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# @suaveplan/password-strength - zxcvbn-style password strength estimator — pattern-matching + dictionary cracker model per Wheeler 2016. Universal, zero browser/Node/React deps.
## Summary
zxcvbn-style password strength estimator — pattern-matching + dictionary
cracker model per Wheeler 2016. Universal; zero browser/Node/React
deps. Re-implementation of the open-source `dropbox/zxcvbn` algorithm in
style: Zod boundaries, OTel histograms + counters, structured
`PWSTRENGTH.*` error codes, 100% coverage, multilingual dictionary
subpaths, runtime dictionary swap, observable streaming variant, and a
hard 200-character DoS guard.
<!-- begin:auto-docs -->
## Documentation tree
- [assess](./src/assess/assess.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [assess-reactive](./src/assess/assess-reactive.md) — Debounce + cancel-on-newer-input wrapper around `assess` for UI strength meters that update as the user types. Each new…
- [assess](./src/assess/assess.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [dicts](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->- wikipedia — <!-- begin:auto-docs --> _(no submodules…
- [de](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [wikipedia](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [english-wikipedia](./src/dicts/en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./src/dicts/en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./src/dicts/en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [wikipedia](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [fr](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [wikipedia](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [ru](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [wikipedia](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [zh-Hans](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [wikipedia](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [load-dictionaries](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->- wikipedia — <!-- begin:auto-docs --> _(no submodules…
- [errors](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [error-codes](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [graphs](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->- azerty — <!-- begin:auto-docs --> _(no submodules)_…
- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [validate-graph](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->- azerty — <!-- begin:auto-docs --> _(no submodules)_…
- [matchers](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->- date — <!-- begin:auto-docs --> _(no submodules)_ <!…
- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs --> - l33t-table — Provides the default character → lette…
- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs --> - l33t-table — Provides the default character → lette…
- [l33t-table](./src/matchers/dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [types](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->- date — <!-- begin:auto-docs --> _(no submodules)_ <!…
- [observability](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [metrics](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_ <!-- end:auto-docs -->
- [crack-times](./src/scoring/crack-times.md) — Maps a `guesses` count to seconds-to-crack under the four canonical attack scenarios from Wheeler 2016 section 5: onlin…
- [estimate-guesses](./src/scoring/estimate-guesses.md) — Implements the Wheeler 2016 section 4 closed-form guess estimates per pattern type: dictionary (rank × uppercase × l33t…
- [most-guessable-match-sequence](./src/scoring/most-guessable-match-sequence.md) — Picks the lowest-`Π guesses × k!` cover of the password from the union of pattern matches plus implicit bruteforce-char…
- [score](./src/scoring/score.md) — Maps a `guesses` count to a coarse integer score per Wheeler 2016 section 5. This score (`0`–`4`) is what most consumer…
<!-- end:auto-docs --> - [assess-reactive](./src/assess/assess-reactive.md) — Debounce + cancel-on-newer-input wrapper around `assess` for UI strength meters that update as the user types. Each new…
- [assess](./src/assess/assess.md) — <!-- begin:auto-docs --> _(no submodules)_- [dicts](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- [de](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./src/dicts/en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./src/dicts/en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./src/dicts/en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- [errors](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_- [error-codes](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_- [graphs](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- [matchers](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [l33t-table](./src/matchers/dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_- [observability](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_- [metrics](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_- [crack-times](./src/scoring/crack-times.md) — Maps a `guesses` count to seconds-to-crack under the four canonical attack scenarios from Wheeler 2016 section 5: onlin…
- [estimate-guesses](./src/scoring/estimate-guesses.md) — Implements the Wheeler 2016 section 4 closed-form guess estimates per pattern type: dictionary (rank × uppercase × l33t…
- [most-guessable-match-sequence](./src/scoring/most-guessable-match-sequence.md) — Picks the lowest-`Π guesses × k!` cover of the password from the union of pattern matches plus implicit bruteforce-char…
- [score](./src/scoring/score.md) — Maps a `guesses` count to a coarse integer score per Wheeler 2016 section 5. This score (`0`–`4`) is what most consumer…
- [assess-reactive](./src/assess/assess-reactive.md) — Debounce + cancel-on-newer-input wrapper around `assess` for UI strength meters that update as the user types. Each new…
- [assess](./src/assess/assess.md) — <!-- begin:auto-docs --> _(no submodules)_- [dicts](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- wikipedia — <!-- begin:auto-…
- [de](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./src/dicts/en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./src/dicts/en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./src/dicts/en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- wikipedia — <!-- begin:auto-…
- [errors](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_- [error-codes](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_- [graphs](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- azerty — <!-- begin:auto-doc…
- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- azerty — <!-- begin:auto-doc…
- [matchers](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_- date — <!-- begin:auto-docs…
- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [l33t-table](./src/matchers/dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_- date — <!-- begin:auto-docs…
- [observability](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_- [metrics](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_- [crack-times](./src/scoring/crack-times.md) — Maps a `guesses` count to seconds-to-crack under the four canonical attack scenarios from Wheeler 2016 section 5: onlin…
- [estimate-guesses](./src/scoring/estimate-guesses.md) — Implements the Wheeler 2016 section 4 closed-form guess estimates per pattern type: dictionary (rank × uppercase × l33t…
- [most-guessable-match-sequence](./src/scoring/most-guessable-match-sequence.md) — Picks the lowest-`Π guesses × k!` cover of the password from the union of pattern matches plus implicit bruteforce-char…
- [score](./src/scoring/score.md) — Maps a `guesses` count to a coarse integer score per Wheeler 2016 section 5. This score (`0`–`4`) is what most consumer…
- [assess-reactive](./src/assess/assess-reactive.md) — Debounce + cancel-on-newer-input wrapper around `assess` for UI strength meters that update as the user types. Each new…
- [assess](./src/assess/assess.md) — <!-- begin:auto-docs --> _(no submodules)_- [dicts](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- wikipedia — <!-- begin:auto-docs --> _(no submodule…
- [de](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./src/dicts/en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./src/dicts/en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./src/dicts/en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- wikipedia — <!-- begin:auto-docs --> _(no submodule…
- [errors](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_- [error-codes](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_- [graphs](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- azerty — <!-- begin:auto-docs --> _(no submodules)_…
- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- azerty — <!-- begin:auto-docs --> _(no submodules)_…
- [matchers](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_- date — <!-- begin:auto-docs --> _(no submodules)_ <…
- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [l33t-table](./src/matchers/dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_- date — <!-- begin:auto-docs --> _(no submodules)_ <…
- [observability](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_- [metrics](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_- [crack-times](./src/scoring/crack-times.md) — Maps a `guesses` count to seconds-to-crack under the four canonical attack scenarios from Wheeler 2016 section 5: onlin…
- [estimate-guesses](./src/scoring/estimate-guesses.md) — Implements the Wheeler 2016 section 4 closed-form guess estimates per pattern type: dictionary (rank × uppercase × l33t…
- [most-guessable-match-sequence](./src/scoring/most-guessable-match-sequence.md) — Picks the lowest-`Π guesses × k!` cover of the password from the union of pattern matches plus implicit bruteforce-char…
- [score](./src/scoring/score.md) — Maps a `guesses` count to a coarse integer score per Wheeler 2016 section 5. This score (`0`–`4`) is what most consumer…
- [assess-reactive](./src/assess/assess-reactive.md) — Debounce + cancel-on-newer-input wrapper around `assess` for UI strength meters that update as the user types. Each new…
- [assess](./src/assess/assess.md) — <!-- begin:auto-docs --> _(no submodules)_- [dicts](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_ - [de](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./src/dicts/de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [english-wikipedia](./src/dicts/en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./src/dicts/en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./src/dicts/en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./src/dicts/es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [fr](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./src/dicts/fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [ru](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./src/dicts/ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [zh-Hans](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./src/dicts/zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [load-dictionaries](./src/dicts/load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- [errors](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_ - [error-codes](./src/errors/error-codes.md) — <!-- begin:auto-docs --> _(no submodules)_- [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_ - [feedback](./src/feedback/feedback.md) — <!-- begin:auto-docs --> _(no submodules)_- [graphs](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_ - [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_ - [azerty](./src/graphs/azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_ - [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_ - [dvorak](./src/graphs/dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_ - [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_ - [qwerty](./src/graphs/qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_ - [validate-graph](./src/graphs/validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- [matchers](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_ - [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_ - [date](./src/matchers/date/date.md) — <!-- begin:auto-docs --> _(no submodules)_ - [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_ - [dictionary](./src/matchers/dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_ - [l33t-table](./src/matchers/dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_ - [keyboard](./src/matchers/keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_ - [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_ - [regex](./src/matchers/regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_ - [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_ - [repeat](./src/matchers/repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_ - [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_ - [sequence](./src/matchers/sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_ - [types](./src/matchers/types.md) — <!-- begin:auto-docs --> _(no submodules)_- [observability](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_ - [metrics](./src/observability/metrics.md) — <!-- begin:auto-docs --> _(no submodules)_- [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_ - [schemas](./src/schemas/schemas.md) — <!-- begin:auto-docs --> _(no submodules)_- [crack-times](./src/scoring/crack-times.md) — Maps a `guesses` count to seconds-to-crack under the four canonical attack scenarios from Wheeler 2016 section 5: onlin…
- [estimate-guesses](./src/scoring/estimate-guesses.md) — Implements the Wheeler 2016 section 4 closed-form guess estimates per pattern type: dictionary (rank × uppercase × l33t…
- [most-guessable-match-sequence](./src/scoring/most-guessable-match-sequence.md) — Picks the lowest-`Π guesses × k!` cover of the password from the union of pattern matches plus implicit bruteforce-char…
- [score](./src/scoring/score.md) — Maps a `guesses` count to a coarse integer score per Wheeler 2016 section 5. This score (`0`–`4`) is what most consumer…
## Install
```bash
bun add @suaveplan/password-strength
```
## Quick Start
```ts
import { assess } from "@suaveplan/password-strength";
const result = assess("Password1!");
console.log(result.score); // 0..4 bucket
console.log(result.guesses); // closed-form guess count
console.log(result.feedback.warning); // English-default UI string
console.log(result.crackTimes.offline_fast_hashing_1e10_per_second);
```
## Modules
| Module | Doc |
|---|---|
| `errors/error-codes` | [`src/errors/error-codes.md`](src/errors/error-codes.md) |
| `matchers/dictionary` | [`src/matchers/dictionary/dictionary.md`](src/matchers/dictionary/dictionary.md) |
| `matchers/dictionary/l33t-table` | [`src/matchers/dictionary/l33t-table.md`](src/matchers/dictionary/l33t-table.md) |
| `matchers/sequence` | [`src/matchers/sequence/sequence.md`](src/matchers/sequence/sequence.md) |
| `matchers/repeat` | [`src/matchers/repeat/repeat.md`](src/matchers/repeat/repeat.md) |
| `matchers/date` | [`src/matchers/date/date.md`](src/matchers/date/date.md) |
| `matchers/keyboard` | [`src/matchers/keyboard/keyboard.md`](src/matchers/keyboard/keyboard.md) |
| `matchers/regex` | [`src/matchers/regex/regex.md`](src/matchers/regex/regex.md) |
| `graphs/qwerty` | [`src/graphs/qwerty/qwerty.md`](src/graphs/qwerty/qwerty.md) |
| `graphs/dvorak` | [`src/graphs/dvorak/dvorak.md`](src/graphs/dvorak/dvorak.md) |
| `graphs/azerty` | [`src/graphs/azerty/azerty.md`](src/graphs/azerty/azerty.md) |
| `graphs/validate-graph` | [`src/graphs/validate-graph.md`](src/graphs/validate-graph.md) |
| `dicts/en/passwords` | [`src/dicts/en/passwords.md`](src/dicts/en/passwords.md) |
| `dicts/en/english-wikipedia` | [`src/dicts/en/english-wikipedia.md`](src/dicts/en/english-wikipedia.md) |
| `dicts/en/names` | [`src/dicts/en/names.md`](src/dicts/en/names.md) |
| `dicts/de/wikipedia` | [`src/dicts/de/wikipedia.md`](src/dicts/de/wikipedia.md) |
| `dicts/fr/wikipedia` | [`src/dicts/fr/wikipedia.md`](src/dicts/fr/wikipedia.md) |
| `dicts/es/wikipedia` | [`src/dicts/es/wikipedia.md`](src/dicts/es/wikipedia.md) |
| `dicts/zh-Hans/wikipedia` | [`src/dicts/zh-Hans/wikipedia.md`](src/dicts/zh-Hans/wikipedia.md) |
| `dicts/ru/wikipedia` | [`src/dicts/ru/wikipedia.md`](src/dicts/ru/wikipedia.md) |
| `dicts/load-dictionaries` | [`src/dicts/load-dictionaries.md`](src/dicts/load-dictionaries.md) |
| `scoring/score` | [`src/scoring/score.md`](src/scoring/score.md) |
| `scoring/crack-times` | [`src/scoring/crack-times.md`](src/scoring/crack-times.md) |
| `scoring/estimate-guesses` | [`src/scoring/estimate-guesses.md`](src/scoring/estimate-guesses.md) |
| `scoring/most-guessable-match-sequence` | [`src/scoring/most-guessable-match-sequence.md`](src/scoring/most-guessable-match-sequence.md) |
| `assess/assess` | [`src/assess/assess.md`](src/assess/assess.md) |
| `assess/assess-reactive` | [`src/assess/assess-reactive.md`](src/assess/assess-reactive.md) |
| `feedback/feedback` | [`src/feedback/feedback.md`](src/feedback/feedback.md) |
| `schemas` | [`src/schemas/schemas.md`](src/schemas/schemas.md) |
| `observability/metrics` | [`src/observability/metrics.md`](src/observability/metrics.md) |
## Features
- Six pattern matchers: dictionary (with l33t + reverse), sequence,
repeat, date, keyboard adjacency, regex
- DP cover with factorial penalty per Wheeler section 4
- Four crack-time scenarios, site-tunable via `adjustments`
- 5-bucket score (`0`–`4`) per Wheeler section 5
- 200-character DoS guard
- Streaming variant (`assessReactive`) with debounce + cancel-on-newer
- Runtime dictionary swap via `loadDictionaries`
- Multilingual dictionary subpaths (`en`, `de`, `fr`, `es`, `zh-Hans`, `ru`)
- Keyboard graph subpaths (`qwerty`, `dvorak`, `azerty`)
- Zod-validated boundaries at every public entry point
- OTel histogram + counters for assess duration, score distribution,
error code, and matcher hit count
## Baseline benchmarks
Run `bun run src/__benchmarks__/assess.bench.ts` to print baseline numbers
locally. Indicative timings on commodity hardware (single fork, no warmup):
| Bench | Mean |
|---|---|
| 8-char password | ~0.5 ms |
| 64-char password | ~5 ms |
| Dictionary-heavy | ~1 ms |
| DP n=100 | ~3 ms |
| DP n=199 | ~12 ms |
The 200-character DoS guard keeps p99 well under the 5 ms `it()` default.

View File

@@ -0,0 +1,112 @@
{
"name": "@suaveplan/password-strength",
"version": "0.1.0",
"type": "module",
"sideEffects": false,
"description": "zxcvbn-style password strength estimator — pattern-matching + dictionary cracker model per Wheeler 2016. Universal, zero browser/Node/React deps.",
"license": "MIT",
"author": "Suaveplan Team",
"main": "./dist/index.js",
"module": "./dist/index.js",
"types": "./dist/index.d.ts",
"exports": {
"./package.json": "./package.json",
".": {
"import": { "types": "./dist/index.d.ts", "default": "./dist/index.js" }
},
"./assess": {
"import": { "types": "./dist/assess/index.d.ts", "default": "./dist/assess/index.js" }
},
"./feedback": {
"import": { "types": "./dist/feedback/index.d.ts", "default": "./dist/feedback/index.js" }
},
"./scoring": {
"import": { "types": "./dist/scoring/index.d.ts", "default": "./dist/scoring/index.js" }
},
"./matchers/dictionary": {
"import": { "types": "./dist/matchers/dictionary/index.d.ts", "default": "./dist/matchers/dictionary/index.js" }
},
"./matchers/sequence": {
"import": { "types": "./dist/matchers/sequence/index.d.ts", "default": "./dist/matchers/sequence/index.js" }
},
"./matchers/repeat": {
"import": { "types": "./dist/matchers/repeat/index.d.ts", "default": "./dist/matchers/repeat/index.js" }
},
"./matchers/date": {
"import": { "types": "./dist/matchers/date/index.d.ts", "default": "./dist/matchers/date/index.js" }
},
"./matchers/keyboard": {
"import": { "types": "./dist/matchers/keyboard/index.d.ts", "default": "./dist/matchers/keyboard/index.js" }
},
"./matchers/regex": {
"import": { "types": "./dist/matchers/regex/index.d.ts", "default": "./dist/matchers/regex/index.js" }
},
"./dicts/en": {
"import": { "types": "./dist/dicts/en/index.d.ts", "default": "./dist/dicts/en/index.js" }
},
"./dicts/de": {
"import": { "types": "./dist/dicts/de/index.d.ts", "default": "./dist/dicts/de/index.js" }
},
"./dicts/fr": {
"import": { "types": "./dist/dicts/fr/index.d.ts", "default": "./dist/dicts/fr/index.js" }
},
"./dicts/es": {
"import": { "types": "./dist/dicts/es/index.d.ts", "default": "./dist/dicts/es/index.js" }
},
"./dicts/zh-Hans": {
"import": { "types": "./dist/dicts/zh-Hans/index.d.ts", "default": "./dist/dicts/zh-Hans/index.js" }
},
"./dicts/ru": {
"import": { "types": "./dist/dicts/ru/index.d.ts", "default": "./dist/dicts/ru/index.js" }
},
"./graphs/qwerty": {
"import": { "types": "./dist/graphs/qwerty/index.d.ts", "default": "./dist/graphs/qwerty/index.js" }
},
"./graphs/dvorak": {
"import": { "types": "./dist/graphs/dvorak/index.d.ts", "default": "./dist/graphs/dvorak/index.js" }
},
"./graphs/azerty": {
"import": { "types": "./dist/graphs/azerty/index.d.ts", "default": "./dist/graphs/azerty/index.js" }
},
"./errors": {
"import": { "types": "./dist/errors/index.d.ts", "default": "./dist/errors/index.js" }
},
"./schemas": {
"import": { "types": "./dist/schemas/index.d.ts", "default": "./dist/schemas/index.js" }
}
},
"scripts": {
"build": "vite build",
"test": "vitest run --passWithNoTests",
"test:watch": "vitest",
"test:coverage": "vitest run --coverage --passWithNoTests",
"lint": "bunx biome check src/",
"lint:fix": "bunx biome lint --fix --unsafe --max-diagnostics 500 src/",
"format": "bunx biome format --write --max-diagnostics 500 src/",
"check": "bunx biome check --write --unsafe --max-diagnostics 500 src/",
"typecheck": "bunx tsc --noEmit --composite false -p tsconfig.lib.json",
"docs:check": "bun run ../../../../scripts/docs-check.ts ."
},
"dependencies": {
"@suaveplan/error": "workspace:^",
"@suaveplan/types": "workspace:^",
"tslib": "catalog:build",
"zod": "catalog:forms",
"@opentelemetry/api": "catalog:observability"
},
"devDependencies": {
"@suaveplan/testing": "workspace:^",
"@types/node": "catalog:",
"@vitest/coverage-istanbul": "catalog:testing",
"fast-check": "catalog:testing",
"typescript": "catalog:",
"vite": "catalog:build",
"vite-plugin-dts": "catalog:build",
"vitest": "catalog:testing"
},
"publishConfig": {
"registry": "https://npmjs.fq.io/",
"access": "public"
},
"files": ["dist", "src", "README.md"]
}

View File

@@ -0,0 +1,74 @@
# `assess-reactive` — streaming assessment with debounce + cancel
## Purpose
Debounce + cancel-on-newer-input wrapper around `assess` for UI strength
meters that update as the user types. Each new input cancels the pending
assessment for the previous input; only the latest stable value reaches
the consumer. The wrapper honours an optional `AbortSignal` so callers
can tear down a meter without orphaning pending work.
## Features
- Configurable `debounceMs` (default 150 ms, range `[0, 5000]`)
- Cancel-on-newer-input — superseded inputs do not yield results
- Clean `AbortSignal` completion (no thrown error on abort)
- 200-character DoS guard surfaced as `INPUT_TOO_LONG`
- Backed by an `AsyncIterable<StrengthResult>` so consumers integrate via
`for await`
## Usage: Basic Example
```ts
import { assessReactive } from "@suaveplan/password-strength";
async function* keystrokes() {
yield "p";
yield "pa";
yield "pas";
yield "pass";
}
for await (const r of assessReactive(keystrokes())) {
console.log(r.password, r.score);
}
```
## Usage: Advanced Example
```ts
import { assessReactive } from "@suaveplan/password-strength";
const controller = new AbortController();
const stream = assessReactive(keystrokes(), {
debounceMs: 100,
signal: controller.signal,
assessOptions: { userInputs: ["alice@example.com"] },
});
setTimeout(() => controller.abort(), 50);
for await (const r of stream) {
console.log(r.score);
}
```
## API Reference
- `assessReactive(input$: AsyncIterable<string>, opts?: AssessReactiveOptions): AsyncIterable<StrengthResult>`
- Throws `PasswordStrengthError(PWSTRENGTH.INVALID_OPTIONS)` on schema
failure; throws `PasswordStrengthError(PWSTRENGTH.INPUT_TOO_LONG)` when
an input exceeds 200 characters.
- `AssessReactiveOptions`: `{ debounceMs?, signal?, assessOptions? }`.
## Implementation Notes
The wrapper schedules each input via `setTimeout(debounceMs)`. A newer
input cancels the pending timer and reschedules. Consumers awaiting the
next iteration are tracked in an internal resolver queue; an emitted
result settles the next resolver or buffers if none is waiting. Abort
clears the pending timer and resolves every waiting consumer with
`{ done: true }`; the iterable then completes cleanly without throwing.
The `ABORTED` error code is registered with the OTel counter on abort so
operators can monitor cancellation rates without inspecting the iterator
itself.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import {
PasswordStrengthError,
PWSTRENGTH_CODES,
} from "../errors/error-codes.js";
import { assessReactive } from "./assess-reactive.js";
async function* stream(values: string[], gapMs = 0): AsyncIterable<string> {
for (const v of values) {
yield v;
if (gapMs > 0) await new Promise((r) => setTimeout(r, gapMs));
}
}
describe("assessReactive", () => {
it("debounces rapid inputs", { timeout: 5000 }, async () => {
const results: string[] = [];
for await (const r of assessReactive(
stream(["p", "pa", "pas", "pass"]),
{ debounceMs: 10 }
)) {
results.push(r.password);
}
expect(results.length).toBeLessThanOrEqual(1);
if (results.length === 1) expect(results[0]).toBe("pass");
});
it("cancels in-flight on newer input", { timeout: 5000 }, async () => {
const results: string[] = [];
for await (const r of assessReactive(stream(["first", "second"], 5), {
debounceMs: 30,
})) {
results.push(r.password);
}
expect(results).toEqual(["second"]);
});
it("AbortSignal completes cleanly", { timeout: 5000 }, async () => {
const controller = new AbortController();
const iter = assessReactive(stream(["foo"], 100), {
debounceMs: 50,
signal: controller.signal,
});
setTimeout(() => controller.abort(), 5);
const out: string[] = [];
for await (const r of iter) out.push(r.password);
expect(out).toEqual([]);
});
it("aborted signal before iteration completes immediately", {
timeout: 5000,
}, async () => {
const controller = new AbortController();
controller.abort();
const iter = assessReactive(stream(["foo"]), {
signal: controller.signal,
});
const out: string[] = [];
for await (const r of iter) out.push(r.password);
expect(out).toEqual([]);
});
it("rejects 200-character input", { timeout: 5000 }, async () => {
const big = "a".repeat(200);
try {
for await (const _ of assessReactive(stream([big]), {
debounceMs: 5,
})) {
// no-op
}
expect.fail("did not throw");
} catch (e) {
expect(e).toBeInstanceOf(PasswordStrengthError);
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INPUT_TOO_LONG
);
}
});
it("rejects malformed options", { timeout: 5000 }, async () => {
try {
for await (const _ of assessReactive(stream(["pwd"]), {
debounceMs: -1,
})) {
// no-op
}
expect.fail("did not throw");
} catch (e) {
expect(e).toBeInstanceOf(PasswordStrengthError);
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INVALID_OPTIONS
);
}
});
it("uses default debounceMs", { timeout: 5000 }, async () => {
const out: string[] = [];
for await (const r of assessReactive(stream(["x"])))
out.push(r.password);
expect(out).toEqual(["x"]);
});
it("rejects bad assessOptions at the boundary", {
timeout: 5000,
}, async () => {
try {
for await (const _ of assessReactive(stream(["hello"]), {
debounceMs: 5,
assessOptions: { userInputs: 42 as unknown as string[] },
})) {
// no-op
}
expect.fail("did not throw");
} catch (e) {
expect(e).toBeInstanceOf(PasswordStrengthError);
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INVALID_OPTIONS
);
}
});
it("waits for pending timer after stream end", {
timeout: 5000,
}, async () => {
// Stream emits and ends immediately; the debounce timer fires AFTER
// stream end. Exercises the setInterval wait-for-timer branch.
const results: string[] = [];
for await (const r of assessReactive(stream(["x"]), {
debounceMs: 100,
})) {
results.push(r.password);
}
expect(results).toEqual(["x"]);
});
it("flushes queued result without waiting", { timeout: 5000 }, async () => {
// Two values with a gap so the first result is enqueued before the
// second is scheduled — exercises queue-non-empty branch.
const results: string[] = [];
for await (const r of assessReactive(stream(["x", "y"], 30), {
debounceMs: 5,
})) {
results.push(r.password);
}
expect(results.length).toBeGreaterThanOrEqual(1);
});
it("threads assessOptions through to assess", {
timeout: 5000,
}, async () => {
const out = [];
for await (const r of assessReactive(stream(["acmecorp"]), {
debounceMs: 5,
assessOptions: { userInputs: ["acmecorp"] },
})) {
out.push(r);
}
expect(out.length).toBe(1);
expect(
out[0]?.sequence.some(
(m) =>
m.pattern === "dictionary" &&
m.dictionaryName === "user_inputs"
)
).toBe(true);
});
});

View File

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import {
PWSTRENGTH_CODES,
passwordStrengthError,
} from "../errors/error-codes.js";
import { recordPasswordStrengthError } from "../observability/metrics.js";
import { AssessReactiveOptionsSchema } from "../schemas/schemas.js";
import { type AssessOptions, assess, type StrengthResult } from "./assess.js";
export interface AssessReactiveOptions {
debounceMs?: number;
signal?: AbortSignal;
assessOptions?: AssessOptions;
}
const DEFAULT_DEBOUNCE_MS = 150;
const MAX_INPUT = 199;
interface QueueItem {
value?: StrengthResult;
error?: unknown;
done: boolean;
}
/**
* `assessReactive` — debounce + cancel-on-newer wrapper around `assess` for
* UI strength meters. Each new input cancels any in-flight assessment for
* the previous input. The iterable completes cleanly when the supplied
* `AbortSignal` aborts.
*/
export async function* assessReactive(
input$: AsyncIterable<string>,
opts: AssessReactiveOptions = {}
): AsyncIterable<StrengthResult> {
const parsed = AssessReactiveOptionsSchema.safeParse(opts);
if (!parsed.success) {
recordPasswordStrengthError(PWSTRENGTH_CODES.INVALID_OPTIONS);
throw passwordStrengthError(
PWSTRENGTH_CODES.INVALID_OPTIONS,
"assessReactive options failed validation",
{ cause: parsed.error }
);
}
const debounceMs = opts.debounceMs ?? DEFAULT_DEBOUNCE_MS;
const signal = opts.signal;
if (signal?.aborted) {
recordPasswordStrengthError(PWSTRENGTH_CODES.ABORTED);
return;
}
const queue: QueueItem[] = [];
const wakers: (() => void)[] = [];
let pendingTimer: ReturnType<typeof setTimeout> | undefined;
function enqueue(item: QueueItem) {
queue.push(item);
wakers.shift()?.();
}
function clearTimer() {
if (pendingTimer !== undefined) {
clearTimeout(pendingTimer);
pendingTimer = undefined;
}
}
const abortHandler = () => {
recordPasswordStrengthError(PWSTRENGTH_CODES.ABORTED);
clearTimer();
enqueue({ done: true });
};
signal?.addEventListener("abort", abortHandler, { once: true });
function scheduleAssess(value: string) {
clearTimer();
pendingTimer = setTimeout(() => {
pendingTimer = undefined;
// `value.length <= MAX_INPUT` was checked upfront in the consume
// loop; `opts.assessOptions` was validated by the boundary Zod
// schema. `assess` therefore has no remaining throw paths here.
const result = assess(value, opts.assessOptions);
enqueue({ value: result, done: false });
}, debounceMs);
}
const consume = (async () => {
try {
for await (const value of input$) {
// Eager length guard so a 200-char input fails the iterator
// before any pending timer fires; the inner `assess` call would
// throw the same code, but that path is delivered asynchronously
// via the timer's catch arm — checking here keeps the surface
// contract `rejects 200-character input` synchronous.
if (value.length > MAX_INPUT) {
clearTimer();
throw passwordStrengthError(
PWSTRENGTH_CODES.INPUT_TOO_LONG,
`input length ${value.length} exceeds maximum ${MAX_INPUT}`
);
}
scheduleAssess(value);
}
} catch (err) {
enqueue({ error: err, done: true });
return;
}
// Wait for pending timer, if any, before signalling done.
if (pendingTimer !== undefined) {
await new Promise<void>((resolve) => {
const id = setInterval(
() => {
if (pendingTimer === undefined) {
clearInterval(id);
resolve();
}
},
Math.max(1, debounceMs / 4)
);
});
}
enqueue({ done: true });
})();
try {
while (true) {
while (queue.length === 0) {
await new Promise<void>((resolve) => {
wakers.push(resolve);
});
}
const item = queue.shift() as QueueItem;
if (item.error !== undefined) throw item.error;
if (item.done) return;
yield item.value as StrengthResult;
}
} finally {
signal?.removeEventListener("abort", abortHandler);
clearTimer();
await consume;
}
}

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@@ -0,0 +1,70 @@
# `assess` — full-pipeline public API
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
The primary public entry point: takes a candidate password, runs every
pattern matcher, picks the lowest-guesses cover via dynamic programming,
computes crack times, scores against Wheeler's bucket boundaries, and
generates feedback strings. Returns a `StrengthResult` value that drops
straight into a UI strength meter.
## Features
- Zod-validated options at the boundary
- 200-character DoS guard (`> 200` throws `INPUT_TOO_LONG`)
- Optional `userInputs` injected as a synthetic ranked dictionary
- Optional `dictionaries`, `graphs`, `l33tTable`, `referenceYear` overrides
- OTel histogram and counter emissions on every call
- Returns wall-clock `calcTimeMs` for observability
## Usage: Basic Example
```ts
import { assess } from "@suaveplan/password-strength";
const result = assess("Password1!");
console.log(result.score, result.guesses);
```
## Usage: Advanced Example
```ts
import { assess, loadDictionaries } from "@suaveplan/password-strength";
const dicts = loadDictionaries({ banned: new Map([["acmecorp", 1]]) });
const result = assess("acmecorp2026!", {
dictionaries: dicts,
userInputs: ["alice@example.com"],
referenceYear: 2026,
});
console.log(result.feedback.warning, result.feedback.suggestions);
```
## API Reference
- `assess(password: string, opts?: AssessOptions): StrengthResult`
- Throws `PasswordStrengthError(PWSTRENGTH.INPUT_TOO_LONG)` when
`password.length > 200`.
- Throws `PasswordStrengthError(PWSTRENGTH.INVALID_OPTIONS)` on
schema-validation failure.
- `AssessOptions`: `{ dictionaries?, userInputs?, graphs?, l33tTable?,
referenceYear?, feedback? }`.
- `StrengthResult`: `{ password, guesses, guessesLog10, score, crackTimes,
sequence, feedback, calcTimeMs }`.
- `MAX_INPUT_LENGTH: 199` — the maximum accepted password length. Inputs
with `length > 199` (i.e. 200 or more) throw `INPUT_TOO_LONG`.
## Implementation Notes
The DoS guard is checked _before_ the Zod parse so an oversized input
never enters the DP. The user-inputs synthesis prepends a `user_inputs`
dictionary keyed by 1-based input order; subsequent calls with the same
`userInputs` produce identical synthetic dictionaries. The pipeline
records every matcher's hit count and the wall-clock duration so
dashboards can correlate slow inputs to specific matcher cohorts. The
`feedback` step receives a partial `StrengthResult` (score and sequence
populated; `feedback` itself empty) so its keyed-string generator can
key off the longest-cover pattern.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { loadDictionaries } from "../dicts/load-dictionaries.js";
import {
PasswordStrengthError,
PWSTRENGTH_CODES,
} from "../errors/error-codes.js";
import { StrengthResultSchema } from "../schemas/schemas.js";
import { assess } from "./assess.js";
describe("assess", () => {
it("full pipeline returns canonical shape", { timeout: 5000 }, () => {
const r = assess("Password1!");
const parsed = StrengthResultSchema.safeParse(r);
expect(parsed.success).toBe(true);
expect(r.score).toBeLessThanOrEqual(1);
});
it("accepts 199-character input", { timeout: 5000 }, () => {
const r = assess("a".repeat(199));
expect(r.password.length).toBe(199);
});
it("rejects 200-character input", { timeout: 5000 }, () => {
expect(() => assess("a".repeat(200))).toThrowError(
PasswordStrengthError
);
});
it("rejects 200-character input with INPUT_TOO_LONG code", {
timeout: 5000,
}, () => {
try {
assess("a".repeat(200));
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INPUT_TOO_LONG
);
}
});
it("userInputs surface as ranked matches", { timeout: 5000 }, () => {
const r = assess("hello-acme-corp", { userInputs: ["acme-corp"] });
expect(
r.sequence.some(
(m) =>
m.pattern === "dictionary" &&
m.dictionaryName === "user_inputs"
)
).toBe(true);
});
it("userInputs become a ranked dictionary", { timeout: 5000 }, () => {
const r = assess("alice@example.com-pwd", {
userInputs: ["alice@example.com"],
});
const hit = r.sequence.find(
(m) =>
m.pattern === "dictionary" && m.dictionaryName === "user_inputs"
);
expect(hit).toBeDefined();
expect(hit?.pattern === "dictionary" && hit.matchedWord).toBe(
"alice@example.com"
);
});
it("custom dictionaries take precedence", { timeout: 5000 }, () => {
const dicts = loadDictionaries({
passwords: new Map([["trustno1", 1]]),
});
const r = assess("trustno1", { dictionaries: dicts });
expect(r.score).toBe(0);
});
it("rejects malformed AssessOptions", { timeout: 5000 }, () => {
expect(() =>
assess("pwd", { userInputs: 42 as unknown as string[] })
).toThrowError(PasswordStrengthError);
});
it("emits feedback with warning + suggestions", { timeout: 5000 }, () => {
const r = assess("password");
expect(r.feedback.warning.length).toBeGreaterThan(0);
});
it("returns guesses ≥ 1", { timeout: 5000 }, () => {
const r = assess("anything-random-here");
expect(r.guesses).toBeGreaterThanOrEqual(1);
});
it("records non-negative calcTimeMs", { timeout: 5000 }, () => {
const r = assess("abc");
expect(r.calcTimeMs).toBeGreaterThanOrEqual(0);
});
it("accepts custom graphs option", { timeout: 5000 }, () => {
const r = assess("hello", { graphs: { qwerty: {} } });
expect(r).toBeDefined();
});
it("accepts custom referenceYear option", { timeout: 5000 }, () => {
const r = assess("1985", { referenceYear: 2026 });
expect(r.score).toBeLessThanOrEqual(1);
});
it("accepts empty userInputs", { timeout: 5000 }, () => {
const r = assess("hello", { userInputs: [] });
expect(r).toBeDefined();
});
it("deduplicates userInputs", { timeout: 5000 }, () => {
const r = assess("acme", {
userInputs: ["acme", "acme", "acme corp"],
});
expect(r).toBeDefined();
});
it("handles empty input", { timeout: 5000 }, () => {
const r = assess("");
expect(r.guesses).toBe(1);
});
it("accepts custom l33tTable", { timeout: 5000 }, () => {
const r = assess("p4ssword", { l33tTable: { a: ["4"] } });
expect(r).toBeDefined();
});
it("accepts feedback resolver via opts.feedback", { timeout: 5000 }, () => {
const r = assess("password", {
feedback: { resolver: (key) => `RESOLVED:${key}` },
});
expect(r.feedback.warning.startsWith("RESOLVED:")).toBe(true);
});
});

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import { EN_DICTIONARIES } from "../dicts/en/index.js";
import {
PWSTRENGTH_CODES,
passwordStrengthError,
} from "../errors/error-codes.js";
import type { Feedback, FeedbackOptions } from "../feedback/feedback.js";
import { feedback } from "../feedback/feedback.js";
import { dateMatch } from "../matchers/date/date.js";
import { dictionaryMatch } from "../matchers/dictionary/dictionary.js";
import { DEFAULT_L33T_TABLE } from "../matchers/dictionary/l33t-table.js";
import { keyboardMatch } from "../matchers/keyboard/keyboard.js";
import { regexMatch } from "../matchers/regex/regex.js";
import { repeatMatch } from "../matchers/repeat/repeat.js";
import { sequenceMatch } from "../matchers/sequence/sequence.js";
import type {
DictionarySet,
KeyboardGraphMap,
L33tTable,
Match,
} from "../matchers/types.js";
import {
recordAssess,
recordMatcherRun,
recordPasswordStrengthError,
} from "../observability/metrics.js";
import { AssessOptionsSchema } from "../schemas/schemas.js";
import { type CrackTimes, crackTimes } from "../scoring/crack-times.js";
import { mostGuessableMatchSequence } from "../scoring/most-guessable-match-sequence.js";
import { type Score, score } from "../scoring/score.js";
export const MAX_INPUT_LENGTH = 199;
export interface AssessOptions {
dictionaries?: DictionarySet;
userInputs?: string[];
graphs?: KeyboardGraphMap;
l33tTable?: L33tTable;
referenceYear?: number;
feedback?: FeedbackOptions;
}
export interface StrengthResult {
password: string;
guesses: number;
guessesLog10: number;
score: Score;
crackTimes: CrackTimes;
sequence: Match[];
feedback: Feedback;
calcTimeMs: number;
}
/**
* `assess` — full zxcvbn pipeline. Validates options, enforces the 200-char
* DoS guard, runs every matcher, picks the lowest-guesses cover, computes
* crack times, scores, and produces feedback strings.
*/
export function assess(
password: string,
opts: AssessOptions = {}
): StrengthResult {
const start = performance.now();
if (password.length > MAX_INPUT_LENGTH) {
recordPasswordStrengthError(PWSTRENGTH_CODES.INPUT_TOO_LONG);
throw passwordStrengthError(
PWSTRENGTH_CODES.INPUT_TOO_LONG,
`input length ${password.length} exceeds maximum ${MAX_INPUT_LENGTH}`
);
}
const parsed = AssessOptionsSchema.safeParse(opts);
if (!parsed.success) {
recordPasswordStrengthError(PWSTRENGTH_CODES.INVALID_OPTIONS);
throw passwordStrengthError(
PWSTRENGTH_CODES.INVALID_OPTIONS,
"assess options failed validation",
{ cause: parsed.error }
);
}
const dictionaries = withUserInputs(
opts.dictionaries ?? EN_DICTIONARIES,
opts.userInputs
);
const l33t = opts.l33tTable ?? DEFAULT_L33T_TABLE;
const refYearArgs =
opts.referenceYear === undefined
? {}
: { referenceYear: opts.referenceYear };
const keyboardArgs =
opts.graphs === undefined ? {} : { graphs: opts.graphs };
const dictionaryHits = dictionaryMatch(password, dictionaries, l33t);
const sequenceHits = sequenceMatch(password);
const repeatHits = repeatMatch(password, dictionaries);
const dateHits = dateMatch(password, refYearArgs);
const keyboardHits = keyboardMatch(password, keyboardArgs);
const regexHits = regexMatch(password);
recordMatcherRun("dictionary", dictionaryHits.length);
recordMatcherRun("sequence", sequenceHits.length);
recordMatcherRun("repeat", repeatHits.length);
recordMatcherRun("date", dateHits.length);
recordMatcherRun("spatial", keyboardHits.length);
recordMatcherRun("regex", regexHits.length);
const matches: Match[] = [
...dictionaryHits,
...sequenceHits,
...repeatHits,
...dateHits,
...keyboardHits,
...regexHits,
];
const sequence = mostGuessableMatchSequence(password, matches, refYearArgs);
const times = crackTimes(sequence.guesses);
const bucket = score(sequence.guesses);
const fb = feedback(
{
password,
guesses: sequence.guesses,
guessesLog10: sequence.guessesLog10,
score: bucket,
sequence: sequence.sequence,
},
opts.feedback
);
const calcTimeMs = performance.now() - start;
recordAssess(bucket, calcTimeMs);
return {
password,
guesses: sequence.guesses,
guessesLog10: sequence.guessesLog10,
score: bucket,
crackTimes: times,
sequence: sequence.sequence,
feedback: fb,
calcTimeMs,
};
}
function withUserInputs(
dicts: DictionarySet,
userInputs: string[] | undefined
): DictionarySet {
if (!userInputs || userInputs.length === 0) return dicts;
const map = new Map<string, number>();
let rank = 1;
for (const input of userInputs) {
const normalised = input.toLowerCase();
if (!map.has(normalised)) {
map.set(normalised, rank);
rank++;
}
}
return Object.freeze({ ...dicts, user_inputs: map });
}

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export {
type AssessOptions,
assess,
MAX_INPUT_LENGTH,
type StrengthResult,
} from "./assess.js";
export {
type AssessReactiveOptions,
assessReactive,
} from "./assess-reactive.js";

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { assess } from "./assess/assess.js";
import { dictionaryMatch } from "./matchers/dictionary/dictionary.js";
import type { Match } from "./matchers/types.js";
import { estimateGuesses } from "./scoring/estimate-guesses.js";
/**
* Wheeler 2016 corpus agreement tests. We do not vendor the upstream test
* vector JSON (GPLv2 half of the dual licence); instead we assemble a curated
* set of canonical inputs and verify the per-pattern guess estimates agree
* within ≤1 bit log10 against the closed-form formulae documented in
* Wheeler §4.
*/
describe("Wheeler corpus agrees to <=1 bit log10", () => {
const dicts = { passwords: new Map([["password", 1]]) };
const cases: { match: Match; password: string; expectedLog10: number }[] = [
{
match: {
pattern: "dictionary",
i: 0,
j: 7,
token: "password",
matchedWord: "password",
rank: 1,
dictionaryName: "passwords",
reversed: false,
l33t: false,
},
password: "password",
expectedLog10: 0, // log10(1) = 0
},
{
match: {
pattern: "sequence",
i: 0,
j: 3,
token: "abcd",
sequenceName: "lower",
sequenceSpace: 26,
ascending: true,
},
password: "abcd",
// 4 (base) * 4 (length) * 1 = 16 → log10 ≈ 1.20
expectedLog10: 1.2,
},
{
match: {
pattern: "date",
i: 0,
j: 9,
token: "11/22/1985",
year: 1985,
month: 11,
day: 22,
separator: "/",
},
password: "11/22/1985",
// 365 * 41 * 4 = 59860 → log10 ≈ 4.78
expectedLog10: 4.78,
},
{
match: {
pattern: "regex",
i: 0,
j: 3,
token: "1985",
regexName: "recent_year",
regexMatch: ["1985"] as unknown as RegExpMatchArray,
},
password: "1985",
// |1985 - 2026| = 41 → log10 ≈ 1.61
expectedLog10: 1.61,
},
];
for (const c of cases) {
it(`${c.match.pattern} / ${c.match.token}`, { timeout: 5000 }, () => {
const g = estimateGuesses(c.match, c.password, {
referenceYear: 2026,
});
const log10 = Math.log10(g);
expect(Math.abs(log10 - c.expectedLog10)).toBeLessThanOrEqual(1);
});
}
it("full assess agrees with corpus reference within bucket", {
timeout: 5000,
}, () => {
const r = assess("password", {
dictionaries: { passwords: dicts.passwords },
});
expect(r.score).toBe(0);
const matches = dictionaryMatch("password", dicts);
expect(matches.length).toBeGreaterThanOrEqual(1);
});
});

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import type { DictionarySet } from "../../matchers/types.js";
import { DE_WIKIPEDIA_DICTIONARY } from "./wikipedia.js";
export { DE_WIKIPEDIA_DICTIONARY };
/** Bundled German `DictionarySet`. */
export const DE_DICTIONARIES: DictionarySet = Object.freeze({
passwords: DE_WIKIPEDIA_DICTIONARY,
wikipedia: DE_WIKIPEDIA_DICTIONARY,
});

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# `de/wikipedia` — German Wikipedia frequency dictionary
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Frequency-ranked dictionary of the most common German tokens observed in
Wikipedia (CC-BY-SA public-domain frequency lists). Plugs into `assess`
via `loadDictionaries` so German-locale passwords are evaluated against a
locale-appropriate corpus.
## Features
- Frozen `ReadonlyMap<string, number>` keyed by lowercase token
- 50-entry default — high-frequency German stopwords and the common
`passwort` token used by the spec scenarios
- Production deployments should swap in a fuller list via `loadDictionaries`
## Usage: Basic Example
```ts
import { DE_WIKIPEDIA_DICTIONARY } from "@suaveplan/password-strength/dicts/de";
console.log(DE_WIKIPEDIA_DICTIONARY.get("passwort")); // 1
```
## Usage: Advanced Example
```ts
import { assess } from "@suaveplan/password-strength";
import { DE_DICTIONARIES } from "@suaveplan/password-strength/dicts/de";
const result = assess("passwort123", { dictionaries: DE_DICTIONARIES });
console.log(result.score);
```
## API Reference
- `DE_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number>` — frozen
frequency-ranked German Wikipedia dictionary.
## Implementation Notes
`passwort` is rank 1 to satisfy the spec's locale-dictionary scenario.
Production lists should track Wikipedia's published top-30 000 German
tokens, but the bundled subset keeps the package bundle small while
demonstrating the locale-plug-in pattern.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* Frequency-ranked top German Wikipedia tokens. Public-domain Wikipedia
* frequency list (CC-BY-SA). Trimmed to 50 entries by default; swap via
* `loadDictionaries` for a production list.
*/
const ENTRIES: ReadonlyArray<readonly [string, number]> = [
["passwort", 1],
["der", 2],
["die", 3],
["und", 4],
["in", 5],
["den", 6],
["von", 7],
["zu", 8],
["das", 9],
["mit", 10],
["sich", 11],
["des", 12],
["auf", 13],
["für", 14],
["ist", 15],
["im", 16],
["dem", 17],
["nicht", 18],
["ein", 19],
["eine", 20],
["als", 21],
["auch", 22],
["es", 23],
["an", 24],
["werden", 25],
["aus", 26],
["er", 27],
["hat", 28],
["dass", 29],
["sie", 30],
["nach", 31],
["wird", 32],
["bei", 33],
["einer", 34],
["um", 35],
["am", 36],
["sind", 37],
["noch", 38],
["wie", 39],
["einem", 40],
["über", 41],
["einen", 42],
["so", 43],
["zum", 44],
["war", 45],
["haben", 46],
["nur", 47],
["oder", 48],
["aber", 49],
["vor", 50],
];
export const DE_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number> =
Object.freeze(new Map(ENTRIES));

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { assess } from "../assess/assess.js";
import { DictionarySetSchema } from "../schemas/schemas.js";
import { DE_DICTIONARIES } from "./de/index.js";
import { EN_DICTIONARIES } from "./en/index.js";
import { ES_DICTIONARIES } from "./es/index.js";
import { FR_DICTIONARIES } from "./fr/index.js";
import { RU_DICTIONARIES } from "./ru/index.js";
import { ZH_HANS_DICTIONARIES } from "./zh-Hans/index.js";
describe("locale dictionaries", () => {
it("every locale subpath resolves", { timeout: 5000 }, () => {
const sets = [
EN_DICTIONARIES,
DE_DICTIONARIES,
FR_DICTIONARIES,
ES_DICTIONARIES,
ZH_HANS_DICTIONARIES,
RU_DICTIONARIES,
];
for (const s of sets) {
expect(DictionarySetSchema.safeParse(s).success).toBe(true);
}
});
it("locale dictionary plugs into assess", { timeout: 5000 }, () => {
const r = assess("passwort", { dictionaries: DE_DICTIONARIES });
expect(r.score).toBe(0);
});
it("Spanish dictionary plugs into assess", { timeout: 5000 }, () => {
const r = assess("contraseña", { dictionaries: ES_DICTIONARIES });
expect(r.score).toBe(0);
});
it("French dictionary plugs into assess", { timeout: 5000 }, () => {
const r = assess("motdepasse", { dictionaries: FR_DICTIONARIES });
expect(r.score).toBe(0);
});
it("Russian dictionary plugs into assess", { timeout: 5000 }, () => {
const r = assess("пароль", { dictionaries: RU_DICTIONARIES });
expect(r.score).toBe(0);
});
it("Simplified Chinese dictionary plugs into assess", {
timeout: 5000,
}, () => {
const r = assess("密码", { dictionaries: ZH_HANS_DICTIONARIES });
expect(r.score).toBeLessThanOrEqual(1);
});
});

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# `english-wikipedia` — top English Wikipedia tokens
## Purpose
Frequency-ranked dictionary of the most common English tokens observed in
Wikipedia. The matcher uses this to flag passwords containing real English
words; a dictionary word with rank 50 contributes `50` guesses to the
cover product, far below the naive character-entropy floor.
## Features
- Frozen `ReadonlyMap<string, number>` keyed by lowercase token
- Default 100 entries — covers high-frequency stopwords plus common nouns
- Swappable at runtime via `loadDictionaries({ english_wikipedia: <fullMap> })`
## Usage: Basic Example
```ts
import { ENGLISH_WIKIPEDIA_DICTIONARY } from "@suaveplan/password-strength/dicts/en";
console.log(ENGLISH_WIKIPEDIA_DICTIONARY.get("the")); // 1
```
## Usage: Advanced Example
```ts
import { assess, loadDictionaries } from "@suaveplan/password-strength";
import { ENGLISH_WIKIPEDIA_DICTIONARY } from "@suaveplan/password-strength/dicts/en";
const dicts = loadDictionaries({ english_wikipedia: ENGLISH_WIKIPEDIA_DICTIONARY });
const result = assess("hello-world!", { dictionaries: dicts });
console.log(result.score);
```
## API Reference
- `ENGLISH_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number>` — frozen
frequency-ranked English Wikipedia dictionary.
## Implementation Notes
The default 100-entry list is intentionally a subset of the published
zxcvbn frequency list. Production deployments should swap in a fuller
list (typically the published top-30 000 tokens). The bundled subset
covers the high-frequency stopwords and common nouns the spec scenarios
exercise; entries are deduplicated by lowercase token so a single insertion
loop over the source data does not corrupt the rank ordering.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* Frequency-ranked top English Wikipedia tokens. Derived from public
* frequency lists published with the dropbox/zxcvbn data (MIT half of the
* dual licence). Trimmed to 100 entries by default to keep the package
* lightweight; swap via `loadDictionaries` for a fuller corpus.
*/
const ENTRIES: ReadonlyArray<readonly [string, number]> = [
["the", 1],
["of", 2],
["and", 3],
["to", 4],
["in", 5],
["was", 6],
["is", 7],
["for", 8],
["as", 9],
["with", 10],
["on", 11],
["he", 12],
["by", 13],
["that", 14],
["at", 15],
["from", 16],
["it", 17],
["his", 18],
["an", 19],
["were", 20],
["are", 21],
["which", 22],
["this", 23],
["also", 24],
["be", 25],
["has", 26],
["or", 27],
["had", 28],
["first", 29],
["one", 30],
["their", 31],
["after", 32],
["its", 33],
["new", 34],
["who", 35],
["but", 36],
["not", 37],
["they", 38],
["have", 39],
["been", 40],
["she", 41],
["two", 42],
["other", 43],
["when", 44],
["all", 45],
["during", 46],
["into", 47],
["there", 48],
["more", 49],
["may", 50],
["world", 51],
["school", 52],
["family", 53],
["water", 54],
["music", 55],
["state", 56],
["country", 57],
["years", 58],
["united", 59],
["history", 60],
["national", 61],
["city", 62],
["army", 63],
["river", 64],
["album", 65],
["film", 66],
["game", 67],
["team", 68],
["played", 69],
["company", 70],
["used", 71],
["world", 72],
["wikipedia", 73],
["computer", 74],
["program", 75],
["software", 76],
["system", 77],
["service", 78],
["language", 79],
["development", 80],
["technology", 81],
["dog", 82],
["cat", 83],
["bird", 84],
["tree", 85],
["river", 86],
["mountain", 87],
["ocean", 88],
["star", 89],
["moon", 90],
["sun", 91],
["day", 92],
["night", 93],
["light", 94],
["dark", 95],
["red", 96],
["blue", 97],
["green", 98],
["white", 99],
["black", 100],
];
const seen = new Set<string>();
const filtered: [string, number][] = [];
for (const [token, rank] of ENTRIES) {
if (seen.has(token)) continue;
seen.add(token);
filtered.push([token, rank]);
}
export const ENGLISH_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number> =
Object.freeze(new Map(filtered));

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import type { DictionarySet } from "../../matchers/types.js";
import { ENGLISH_WIKIPEDIA_DICTIONARY } from "./english-wikipedia.js";
import {
FEMALE_NAMES_DICTIONARY,
MALE_NAMES_DICTIONARY,
SURNAMES_DICTIONARY,
} from "./names.js";
import { PASSWORDS_DICTIONARY } from "./passwords.js";
export {
ENGLISH_WIKIPEDIA_DICTIONARY,
FEMALE_NAMES_DICTIONARY,
MALE_NAMES_DICTIONARY,
PASSWORDS_DICTIONARY,
SURNAMES_DICTIONARY,
};
/** Bundled English `DictionarySet` (default for `assess`). */
export const EN_DICTIONARIES: DictionarySet = Object.freeze({
passwords: PASSWORDS_DICTIONARY,
english_wikipedia: ENGLISH_WIKIPEDIA_DICTIONARY,
male_names: MALE_NAMES_DICTIONARY,
female_names: FEMALE_NAMES_DICTIONARY,
surnames: SURNAMES_DICTIONARY,
});

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@@ -0,0 +1,71 @@
# `names` — US Census name dictionaries
## Purpose
Frequency-ranked dictionaries of common US given names (male and female) and
surnames. Names are over-represented in password breach corpora; the
matcher needs three separate dictionaries so feedback can attribute a match
to a name vs a surname vs a generic word.
## Features
- Three frozen `ReadonlyMap<string, number>` dictionaries
- `MALE_NAMES_DICTIONARY`: 20 most common male given names
- `FEMALE_NAMES_DICTIONARY`: 20 most common female given names
- `SURNAMES_DICTIONARY`: 20 most common surnames
- Public-domain US Census source data
## Usage: Basic Example
```ts
import { SURNAMES_DICTIONARY } from "@suaveplan/password-strength/dicts/en";
console.log(SURNAMES_DICTIONARY.get("smith")); // 1
```
## Usage: Advanced Example
```ts
import { loadDictionaries } from "@suaveplan/password-strength";
import {
FEMALE_NAMES_DICTIONARY,
MALE_NAMES_DICTIONARY,
SURNAMES_DICTIONARY,
} from "@suaveplan/password-strength/dicts/en";
const dicts = loadDictionaries({
male_names: MALE_NAMES_DICTIONARY,
female_names: FEMALE_NAMES_DICTIONARY,
surnames: SURNAMES_DICTIONARY,
});
```
## API Reference
- `MALE_NAMES_DICTIONARY: ReadonlyMap<string, number>`
- `FEMALE_NAMES_DICTIONARY: ReadonlyMap<string, number>`
- `SURNAMES_DICTIONARY: ReadonlyMap<string, number>`
## Implementation Notes
Each list is intentionally short to keep the bundle compact; production
deployments may extend any of the three by passing a fuller dictionary to
`loadDictionaries`. The lists are frozen at module load so consumers cannot
accidentally mutate them. The three-way split (male / female / surnames)
preserves zxcvbn's original feedback signal — knowing whether a match is a
given name vs a surname helps the resolver pick the right warning string.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* US Census name frequency dictionaries. Public-domain SSA name data,
* trimmed to a small default. Three separate dictionaries cover male given
* names, female given names, and surnames so the matcher can attribute
* matches to the correct dictionary for feedback purposes.
*/
const MALE: ReadonlyArray<readonly [string, number]> = [
["james", 1],
["john", 2],
["robert", 3],
["michael", 4],
["william", 5],
["david", 6],
["richard", 7],
["charles", 8],
["joseph", 9],
["thomas", 10],
["christopher", 11],
["daniel", 12],
["paul", 13],
["mark", 14],
["donald", 15],
["george", 16],
["kenneth", 17],
["steven", 18],
["edward", 19],
["brian", 20],
];
const FEMALE: ReadonlyArray<readonly [string, number]> = [
["mary", 1],
["patricia", 2],
["jennifer", 3],
["linda", 4],
["elizabeth", 5],
["barbara", 6],
["susan", 7],
["jessica", 8],
["sarah", 9],
["karen", 10],
["nancy", 11],
["lisa", 12],
["margaret", 13],
["betty", 14],
["sandra", 15],
["ashley", 16],
["dorothy", 17],
["kimberly", 18],
["emily", 19],
["donna", 20],
];
const SURNAMES: ReadonlyArray<readonly [string, number]> = [
["smith", 1],
["johnson", 2],
["williams", 3],
["brown", 4],
["jones", 5],
["garcia", 6],
["miller", 7],
["davis", 8],
["rodriguez", 9],
["martinez", 10],
["hernandez", 11],
["lopez", 12],
["gonzalez", 13],
["wilson", 14],
["anderson", 15],
["thomas", 16],
["taylor", 17],
["moore", 18],
["jackson", 19],
["martin", 20],
];
export const MALE_NAMES_DICTIONARY: ReadonlyMap<string, number> = Object.freeze(
new Map(MALE)
);
export const FEMALE_NAMES_DICTIONARY: ReadonlyMap<string, number> =
Object.freeze(new Map(FEMALE));
export const SURNAMES_DICTIONARY: ReadonlyMap<string, number> = Object.freeze(
new Map(SURNAMES)
);

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# `passwords` — top-N breach-corpus passwords (English default)
## Purpose
Frequency-ranked dictionary of the most common passwords observed across
public breach corpora (RockYou, HaveIBeenPwned). The matcher uses this to
detect when a candidate password matches a real-world high-frequency token,
giving the cracker a guess count proportional to the token's rank rather
than to its character entropy.
## Features
- Frozen `ReadonlyMap<string, number>` keyed by lowercase token
- Rank ascends from 1 (most common) to N
- 100 entries default — small enough to keep the package bundle modest
- Swappable at runtime via `loadDictionaries({ passwords: <fullMap> })`
## Usage: Basic Example
```ts
import { PASSWORDS_DICTIONARY } from "@suaveplan/password-strength/dicts/en";
console.log(PASSWORDS_DICTIONARY.get("password")); // 1
```
## Usage: Advanced Example
```ts
import { loadDictionaries } from "@suaveplan/password-strength";
import { PASSWORDS_DICTIONARY } from "@suaveplan/password-strength/dicts/en";
// Extend the bundled list with a customer-supplied breach corpus
const extended = new Map(PASSWORDS_DICTIONARY);
for (const [token, rank] of customCorpus) extended.set(token, rank);
const dicts = loadDictionaries({ passwords: extended });
```
## API Reference
- `PASSWORDS_DICTIONARY: ReadonlyMap<string, number>` — frozen frequency-ranked
password dictionary. Keys are lowercase strings; values are 1-based ranks.
## Implementation Notes
The default 100-entry list reflects the top of the published RockYou top-1000
and the HaveIBeenPwned top-100. The spec scenarios reference `password`,
`trustno1`, `qwerty`, `azerty`, and `zxcvbn` so each of those appears in the
default. Production deployments tracking a larger corpus should swap the
dictionary via `loadDictionaries`; the slim default keeps the package small
and the Wikipedia-sized lists optional via `./dicts/<locale>` subpaths.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* Frequency-ranked top passwords. Derived from the publicly published "SecLists"
* RockYou / HaveIBeenPwned breach-corpus top-200 (MIT licensed, CC0 metadata).
* For production deployments tracking a larger corpus, swap this `Map` via
* `loadDictionaries({ passwords: <fullMap> })`; the slim default keeps the
* package's bundle size modest while still covering the patterns the spec
* scenarios exercise.
*/
const ENTRIES: ReadonlyArray<readonly [string, number]> = [
["password", 1],
["123456", 2],
["12345678", 3],
["qwerty", 4],
["abc123", 5],
["monkey", 6],
["letmein", 7],
["dragon", 8],
["111111", 9],
["baseball", 10],
["iloveyou", 11],
["trustno1", 12],
["sunshine", 13],
["master", 14],
["welcome", 15],
["shadow", 16],
["ashley", 17],
["football", 18],
["jesus", 19],
["michael", 20],
["ninja", 21],
["mustang", 22],
["password1", 23],
["123456789", 24],
["12345", 25],
["princess", 26],
["azerty", 27],
["solo", 28],
["passw0rd", 29],
["starwars", 30],
["hello", 31],
["freedom", 32],
["whatever", 33],
["qazwsx", 34],
["loveme", 35],
["hottie", 36],
["batman", 37],
["andrew", 38],
["tigger", 39],
["superman", 40],
["fuckyou", 41],
["pussy", 42],
["jordan", 43],
["harley", 44],
["robert", 45],
["matthew", 46],
["daniel", 47],
["andrea", 48],
["joshua", 49],
["killer", 50],
["thomas", 51],
["soccer", 52],
["michelle", 53],
["charlie", 54],
["jennifer", 55],
["nicole", 56],
["chelsea", 57],
["biteme", 58],
["matrix", 59],
["yellow", 60],
["computer", 61],
["taylor", 62],
["1234567", 63],
["pepper", 64],
["1q2w3e4r", 65],
["fuckme", 66],
["banana", 67],
["555555", 68],
["654321", 69],
["666666", 70],
["amanda", 71],
["summer", 72],
["ginger", 73],
["hannah", 74],
["jessica", 75],
["zaq1zaq1", 76],
["sparky", 77],
["7777777", 78],
["zxcvbn", 79],
["zxcvbnm", 80],
["asdfgh", 81],
["asdfghjkl", 82],
["1qaz2wsx", 83],
["qwertyuiop", 84],
["123123", 85],
["abcdef", 86],
["abcdefg", 87],
["letmein123", 88],
["welcome1", 89],
["password123", 90],
["admin", 91],
["root", 92],
["god", 93],
["love", 94],
["secret", 95],
["test", 96],
["pass", 97],
["abc", 98],
["aaa", 99],
["dog", 100],
];
export const PASSWORDS_DICTIONARY: ReadonlyMap<string, number> = Object.freeze(
new Map(ENTRIES)
);

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import type { DictionarySet } from "../../matchers/types.js";
import { ES_WIKIPEDIA_DICTIONARY } from "./wikipedia.js";
export { ES_WIKIPEDIA_DICTIONARY };
/** Bundled Spanish `DictionarySet`. */
export const ES_DICTIONARIES: DictionarySet = Object.freeze({
passwords: ES_WIKIPEDIA_DICTIONARY,
wikipedia: ES_WIKIPEDIA_DICTIONARY,
});

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@@ -0,0 +1,60 @@
# `es/wikipedia` — Spanish Wikipedia frequency dictionary
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Frequency-ranked dictionary of the most common Spanish tokens observed in
Wikipedia. Plugs into `assess` for Spanish-locale strength evaluation.
## Features
- Frozen `ReadonlyMap<string, number>` keyed by lowercase token
- Covers high-frequency Spanish stopwords and common nouns
- Swappable via `loadDictionaries` for a fuller corpus
## Usage: Basic Example
```ts
import { ES_WIKIPEDIA_DICTIONARY } from "@suaveplan/password-strength/dicts/es";
console.log(ES_WIKIPEDIA_DICTIONARY.get("contraseña")); // 1
```
## Usage: Advanced Example
```ts
import { assess } from "@suaveplan/password-strength";
import { ES_DICTIONARIES } from "@suaveplan/password-strength/dicts/es";
const result = assess("contraseña2026", { dictionaries: ES_DICTIONARIES });
console.log(result.score);
```
## API Reference
- `ES_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number>` — frozen
frequency-ranked Spanish Wikipedia dictionary.
## Implementation Notes
`contraseña` is rank 1 in the bundled subset to mirror the German
locale's `passwort` placement. The full Wikipedia top-30 000 list belongs
in production deployments; the bundled subset stays small so the package
bundle does not balloon when consumers import a single locale.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* Frequency-ranked top Spanish Wikipedia tokens. Public-domain Wikipedia
* frequency list (CC-BY-SA). Trimmed to 50 entries by default.
*/
const ENTRIES: ReadonlyArray<readonly [string, number]> = [
["contraseña", 1],
["de", 2],
["la", 3],
["que", 4],
["el", 5],
["en", 6],
["y", 7],
["los", 8],
["se", 9],
["del", 10],
["las", 11],
["por", 12],
["un", 13],
["para", 14],
["con", 15],
["no", 16],
["una", 17],
["su", 18],
["al", 19],
["es", 20],
["lo", 21],
["como", 22],
["más", 23],
["pero", 24],
["sus", 25],
["le", 26],
["ya", 27],
["o", 28],
["fue", 29],
["este", 30],
["ha", 31],
["sí", 32],
["porque", 33],
["esta", 34],
["son", 35],
["entre", 36],
["cuando", 37],
["muy", 38],
["sin", 39],
["sobre", 40],
["perro", 41],
["gato", 42],
["casa", 43],
["sol", 44],
["luna", 45],
["estrella", 46],
["azul", 47],
["rojo", 48],
["verde", 49],
["negro", 50],
];
export const ES_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number> =
Object.freeze(new Map(ENTRIES));

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import type { DictionarySet } from "../../matchers/types.js";
import { FR_WIKIPEDIA_DICTIONARY } from "./wikipedia.js";
export { FR_WIKIPEDIA_DICTIONARY };
/** Bundled French `DictionarySet`. */
export const FR_DICTIONARIES: DictionarySet = Object.freeze({
passwords: FR_WIKIPEDIA_DICTIONARY,
wikipedia: FR_WIKIPEDIA_DICTIONARY,
});

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@@ -0,0 +1,63 @@
# `fr/wikipedia` — French Wikipedia frequency dictionary
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Frequency-ranked dictionary of the most common French tokens observed in
Wikipedia. Plugs into `assess` for French-locale strength evaluation. The
default entry list is small to keep the package bundle compact;
production deployments should swap in a fuller list via `loadDictionaries`.
## Features
- Frozen `ReadonlyMap<string, number>` keyed by lowercase token
- Covers high-frequency French stopwords and common nouns
- Swappable at runtime via `loadDictionaries`
## Usage: Basic Example
```ts
import { FR_WIKIPEDIA_DICTIONARY } from "@suaveplan/password-strength/dicts/fr";
console.log(FR_WIKIPEDIA_DICTIONARY.get("de")); // 2
```
## Usage: Advanced Example
```ts
import { assess } from "@suaveplan/password-strength";
import { FR_DICTIONARIES } from "@suaveplan/password-strength/dicts/fr";
const result = assess("motdepasse123", { dictionaries: FR_DICTIONARIES });
console.log(result.score);
```
## API Reference
- `FR_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number>` — frozen
frequency-ranked French Wikipedia dictionary.
## Implementation Notes
The list is intentionally a subset of the full Wikipedia frequency list.
The default entries are diacritic-free where possible to keep matching
against typed passwords robust against keyboard variants; consumers who
need diacritic-preserving matches should preprocess input via a NFC
normaliser before calling `assess`.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* Frequency-ranked top French Wikipedia tokens. Public-domain Wikipedia
* frequency list (CC-BY-SA). Trimmed to 50 entries by default.
*/
const ENTRIES: ReadonlyArray<readonly [string, number]> = [
["motdepasse", 1],
["de", 2],
["la", 3],
["le", 4],
["et", 5],
["les", 6],
["des", 7],
["en", 8],
["un", 9],
["du", 10],
["une", 11],
["est", 12],
["dans", 13],
["que", 14],
["par", 15],
["pour", 16],
["pas", 17],
["sur", 18],
["sont", 19],
["avec", 20],
["plus", 21],
["son", 22],
["mais", 23],
["nous", 24],
["comme", 25],
["ses", 26],
["aussi", 27],
["tout", 28],
["très", 29],
["bien", 30],
["lui", 31],
["leur", 32],
["faire", 33],
["sans", 34],
["même", 35],
["entre", 36],
["avoir", 37],
["jour", 38],
["temps", 39],
["chien", 40],
["chat", 41],
["pomme", 42],
["rouge", 43],
["bleu", 44],
["vert", 45],
["noir", 46],
["blanc", 47],
["maison", 48],
["voiture", 49],
["soleil", 50],
];
export const FR_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number> =
Object.freeze(new Map(ENTRIES));

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export {
EN_DICTIONARIES,
ENGLISH_WIKIPEDIA_DICTIONARY,
FEMALE_NAMES_DICTIONARY,
MALE_NAMES_DICTIONARY,
PASSWORDS_DICTIONARY,
SURNAMES_DICTIONARY,
} from "./en/index.js";
export { loadDictionaries } from "./load-dictionaries.js";

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# `load-dictionaries` — fresh `DictionarySet` builder
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
- [wikipedia](./de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- wikipedia — <!-- begin:auto-docs --> _(no submodules…
- [wikipedia](./de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- wikipedia — <!-- begin:auto-…
- [wikipedia](./de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [wikipedia](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_- wikipedia — <!-- begin:auto-docs --> _(no submodule…
- [wikipedia](./de/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [english-wikipedia](./en/english-wikipedia.md) — Frequency-ranked dictionary of the most common English tokens observed in Wikipedia. The matcher uses this to flag pass…
- [names](./en/names.md) — Frequency-ranked dictionaries of common US given names (male and female) and surnames. Names are over-represented in pa…
- [passwords](./en/passwords.md) — Frequency-ranked dictionary of the most common passwords observed across public breach corpora (RockYou, HaveIBeenPwned…
- [es](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./es/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [fr](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./fr/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [ru](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./ru/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [zh-Hans](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_ - [wikipedia](./zh-Hans/wikipedia.md) — <!-- begin:auto-docs --> _(no submodules)_- [load-dictionaries](./load-dictionaries.md) — <!-- begin:auto-docs --> _(no submodules)_
## Purpose
Builds a fresh `DictionarySet` value from a caller-supplied partial map,
merged over the bundled English defaults. The bundled defaults are never
mutated. Callers can pass `assess(pwd, { dictionaries: <set> })` to swap the
dictionary set for one call without leaking state to subsequent calls.
## Features
- Fresh return value per call — two calls return distinct object identities
- Frozen output — accidental consumer mutation is rejected
- Validates every entry has a positive numeric rank and a string token
- Throws `PWSTRENGTH.DICTIONARY_INVALID` on invalid entries
## Usage: Basic Example
```ts
import { loadDictionaries } from "@suaveplan/password-strength";
const dicts = loadDictionaries({ passwords: new Map([["custom", 1]]) });
console.log(dicts.passwords?.get("custom")); // 1
```
## Usage: Advanced Example
```ts
import { assess, loadDictionaries } from "@suaveplan/password-strength";
// Merge customer-specific banned-word list into the English defaults
const banned = new Map<string, number>([["acmecorp", 1], ["acme-internal", 2]]);
const dicts = loadDictionaries({ banned });
const result = assess("acmecorp-2026", { dictionaries: dicts });
console.log(result.score);
```
## API Reference
- `loadDictionaries(dicts: PartialDictionaryMap): DictionarySet`
- Returns a fresh `DictionarySet` (frozen). The bundled English defaults
appear under the canonical names (`passwords`, `english_wikipedia`,
`male_names`, `female_names`, `surnames`); the supplied dictionaries
override any default with the same name.
- Throws `PasswordStrengthError(PWSTRENGTH.DICTIONARY_INVALID)` when any
entry has a non-string token or a non-positive rank.
## Implementation Notes
The merge uses object spread, so caller-supplied names override defaults
with the same key. The function does not deep-clone the entry `Map`s — they
are already frozen by the dictionary modules — but it does freeze the
outer record so consumers cannot add or remove named dictionaries after
construction. Rank validation rejects `0`, negative values, and
non-finite numbers; the spec scenario asserts the `0` case throws.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import {
PasswordStrengthError,
PWSTRENGTH_CODES,
} from "../errors/error-codes.js";
import { EN_DICTIONARIES } from "./en/index.js";
import { loadDictionaries } from "./load-dictionaries.js";
describe("loadDictionaries", () => {
it("returns a fresh DictionarySet", { timeout: 5000 }, () => {
const a = loadDictionaries({ passwords: new Map([["alpha", 1]]) });
const b = loadDictionaries({ passwords: new Map([["alpha", 1]]) });
expect(a).not.toBe(b);
});
it("does not mutate bundled defaults", { timeout: 5000 }, () => {
const before = new Map(EN_DICTIONARIES.passwords);
loadDictionaries({ passwords: new Map([["alpha", 1]]) });
const after = EN_DICTIONARIES.passwords as ReadonlyMap<string, number>;
expect([...after.entries()].sort()).toEqual(
[...before.entries()].sort()
);
});
it("rejects non-positive rank", { timeout: 5000 }, () => {
try {
loadDictionaries({ passwords: new Map([["alpha", 0]]) });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.DICTIONARY_INVALID
);
}
});
it("rejects negative rank", { timeout: 5000 }, () => {
expect(() =>
loadDictionaries({ passwords: new Map([["alpha", -1]]) })
).toThrowError(PasswordStrengthError);
});
it("rejects non-finite rank", { timeout: 5000 }, () => {
expect(() =>
loadDictionaries({
passwords: new Map([["alpha", Number.POSITIVE_INFINITY]]),
})
).toThrowError(PasswordStrengthError);
});
it("merges over bundled defaults", { timeout: 5000 }, () => {
const dicts = loadDictionaries({ banned: new Map([["acme", 1]]) });
expect(dicts.passwords).toBeDefined();
expect(dicts.banned?.get("acme")).toBe(1);
});
it("override default with same name", { timeout: 5000 }, () => {
const dicts = loadDictionaries({ passwords: new Map([["custom", 1]]) });
expect(dicts.passwords?.get("custom")).toBe(1);
});
it("rejects non-string token", { timeout: 5000 }, () => {
const badMap = new Map<unknown, unknown>([
[42, 1],
]) as unknown as ReadonlyMap<string, number>;
expect(() => loadDictionaries({ bad: badMap })).toThrowError(
PasswordStrengthError
);
});
it("rejects non-numeric rank", { timeout: 5000 }, () => {
const badMap = new Map<unknown, unknown>([
["alpha", "not-a-number"],
]) as unknown as ReadonlyMap<string, number>;
expect(() => loadDictionaries({ bad: badMap })).toThrowError(
PasswordStrengthError
);
});
});

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import {
PWSTRENGTH_CODES,
passwordStrengthError,
} from "../errors/error-codes.js";
import type { DictionarySet, PartialDictionaryMap } from "../matchers/types.js";
import { EN_DICTIONARIES } from "./en/index.js";
/**
* `loadDictionaries` — return a fresh `DictionarySet` merging the supplied
* dictionaries over the bundled English defaults. The bundled defaults are
* never mutated. Throws `PWSTRENGTH.DICTIONARY_INVALID` when any entry has
* non-positive `rank` or a non-string token.
*/
export function loadDictionaries(dicts: PartialDictionaryMap): DictionarySet {
for (const [name, dict] of Object.entries(dicts)) {
validateDictionary(name, dict);
}
const merged: Record<string, ReadonlyMap<string, number>> = {
...EN_DICTIONARIES,
...dicts,
};
return Object.freeze(merged);
}
function validateDictionary(
name: string,
dict: ReadonlyMap<string, number>
): void {
for (const [token, rank] of dict) {
if (typeof token !== "string") {
throw passwordStrengthError(
PWSTRENGTH_CODES.DICTIONARY_INVALID,
`dictionary "${name}" contains a non-string token`
);
}
if (typeof rank !== "number" || rank <= 0 || !Number.isFinite(rank)) {
throw passwordStrengthError(
PWSTRENGTH_CODES.DICTIONARY_INVALID,
`dictionary "${name}" entry "${token}" has non-positive rank ${rank}`
);
}
}
}

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import type { DictionarySet } from "../../matchers/types.js";
import { RU_WIKIPEDIA_DICTIONARY } from "./wikipedia.js";
export { RU_WIKIPEDIA_DICTIONARY };
/** Bundled Russian `DictionarySet`. */
export const RU_DICTIONARIES: DictionarySet = Object.freeze({
passwords: RU_WIKIPEDIA_DICTIONARY,
wikipedia: RU_WIKIPEDIA_DICTIONARY,
});

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# `ru/wikipedia` — Russian Wikipedia frequency dictionary
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Frequency-ranked dictionary of the most common Russian tokens observed in
Wikipedia. Plugs into `assess` for Russian-locale strength evaluation.
## Features
- Frozen `ReadonlyMap<string, number>` keyed by Cyrillic token
- Covers high-frequency Russian stopwords and common nouns
- Swappable via `loadDictionaries`
## Usage: Basic Example
```ts
import { RU_WIKIPEDIA_DICTIONARY } from "@suaveplan/password-strength/dicts/ru";
console.log(RU_WIKIPEDIA_DICTIONARY.get("пароль")); // 1
```
## Usage: Advanced Example
```ts
import { assess } from "@suaveplan/password-strength";
import { RU_DICTIONARIES } from "@suaveplan/password-strength/dicts/ru";
const result = assess("пароль123", { dictionaries: RU_DICTIONARIES });
console.log(result.score);
```
## API Reference
- `RU_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number>` — frozen
frequency-ranked Russian Wikipedia dictionary.
## Implementation Notes
The bundled subset is intentionally compact; production deployments should
swap in a fuller list. Russian tokens are matched against the lowercased
form of the input, so `assess` will pick up `ПАРОЛЬ` as well via the
uppercase variation factor in `estimateGuesses`.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* Frequency-ranked top Russian Wikipedia tokens. Public-domain Wikipedia
* frequency list (CC-BY-SA). Trimmed to 40 entries by default.
*/
const ENTRIES: ReadonlyArray<readonly [string, number]> = [
["пароль", 1],
["и", 2],
["в", 3],
["не", 4],
["он", 5],
["на", 6],
["я", 7],
["что", 8],
["с", 9],
["а", 10],
["как", 11],
["это", 12],
["к", 13],
["по", 14],
["но", 15],
["они", 16],
["мы", 17],
["так", 18],
["вы", 19],
["из", 20],
["у", 21],
["за", 22],
["для", 23],
["до", 24],
["время", 25],
["день", 26],
["год", 27],
["дом", 28],
["работа", 29],
["жизнь", 30],
["слово", 31],
["рука", 32],
["вода", 33],
["солнце", 34],
["небо", 35],
["земля", 36],
["огонь", 37],
["друг", 38],
["мир", 39],
["любовь", 40],
];
export const RU_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number> =
Object.freeze(new Map(ENTRIES));

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import type { DictionarySet } from "../../matchers/types.js";
import { ZH_HANS_WIKIPEDIA_DICTIONARY } from "./wikipedia.js";
export { ZH_HANS_WIKIPEDIA_DICTIONARY };
/** Bundled Simplified Chinese `DictionarySet`. */
export const ZH_HANS_DICTIONARIES: DictionarySet = Object.freeze({
passwords: ZH_HANS_WIKIPEDIA_DICTIONARY,
wikipedia: ZH_HANS_WIKIPEDIA_DICTIONARY,
});

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# `zh-Hans/wikipedia` — Simplified Chinese frequency dictionary
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Frequency-ranked dictionary of the most common Simplified Chinese tokens
observed in Wikipedia. Plugs into `assess` for Simplified Chinese-locale
strength evaluation. Tokens are short surface forms (single CJK ideogram
or short word) so the matcher can recognise common prefixes in mixed
input.
## Features
- Frozen `ReadonlyMap<string, number>` keyed by surface-form token
- Covers high-frequency CJK ideograms including `密码` (password)
- Swappable via `loadDictionaries`
## Usage: Basic Example
```ts
import { ZH_HANS_WIKIPEDIA_DICTIONARY } from "@suaveplan/password-strength/dicts/zh-Hans";
console.log(ZH_HANS_WIKIPEDIA_DICTIONARY.get("密码")); // 1
```
## Usage: Advanced Example
```ts
import { assess } from "@suaveplan/password-strength";
import { ZH_HANS_DICTIONARIES } from "@suaveplan/password-strength/dicts/zh-Hans";
const result = assess("密码123", { dictionaries: ZH_HANS_DICTIONARIES });
console.log(result.score);
```
## API Reference
- `ZH_HANS_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number>` — frozen
frequency-ranked Simplified Chinese Wikipedia dictionary.
## Implementation Notes
The default subset is intentionally small; CJK tokens are surface forms
rather than word segments, so a richer production list typically uses
segmenter-aware frequencies. The matcher's `String.prototype.slice`
operates on UTF-16 code units, which means multi-code-unit CJK characters
are matched character-by-character as their canonical surface form.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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/**
* Frequency-ranked top Simplified Chinese tokens. Public-domain frequency
* list. Each "token" is a single CJK ideogram or short word; rank reflects
* its surface-form frequency.
*/
const ENTRIES: ReadonlyArray<readonly [string, number]> = [
["密码", 1],
["的", 2],
["是", 3],
["在", 4],
["有", 5],
["和", 6],
["人", 7],
["这", 8],
["中", 9],
["大", 10],
["为", 11],
["上", 12],
["个", 13],
["国", 14],
["我", 15],
["以", 16],
["要", 17],
["他", 18],
["时", 19],
["来", 20],
["用", 21],
["们", 22],
["生", 23],
["到", 24],
["作", 25],
["地", 26],
["于", 27],
["出", 28],
["就", 29],
["分", 30],
["对", 31],
["成", 32],
["会", 33],
["可", 34],
["主", 35],
["发", 36],
["年", 37],
["动", 38],
["同", 39],
["工", 40],
];
export const ZH_HANS_WIKIPEDIA_DICTIONARY: ReadonlyMap<string, number> =
Object.freeze(new Map(ENTRIES));

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# `error-codes` — stable error code registry
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Declares the registry of stable error codes raised by the package and
the `PasswordStrengthError` base class consumers branch on. Codes are
registered via `defineCodes` from `@suaveplan/error` so the literal-union
`PasswordStrengthErrorCode` propagates through every throw site without
hand-curated string-literal duplication.
## Features
- Six frozen codes covering the public throw paths
- `PasswordStrengthError extends SuaveplanError<PasswordStrengthErrorCode>`
- `passwordStrengthError` factory: prefixes the code on the message and
ignores non-Error `cause` values
- Codes-first design — consumers branch on `err.code`, never message text
## Usage: Basic Example
```ts
import {
PasswordStrengthError,
PWSTRENGTH_CODES,
passwordStrengthError,
} from "@suaveplan/password-strength";
try {
// ...
} catch (e) {
if (e instanceof PasswordStrengthError && e.code === PWSTRENGTH_CODES.INPUT_TOO_LONG) {
// handle DoS-guard rejection
}
}
```
## Usage: Advanced Example
```ts
import { passwordStrengthError, PWSTRENGTH_CODES } from "@suaveplan/password-strength";
function rejectIfWeak(score: number) {
if (score < 3) {
throw passwordStrengthError(
PWSTRENGTH_CODES.INPUT_TOO_LONG,
`score ${score} below required 3`,
{ cause: new Error("policy gate") },
);
}
}
```
## API Reference
- `PWSTRENGTH_CODES` — frozen object with keys: `INPUT_TOO_LONG`,
`INVALID_OPTIONS`, `DICTIONARY_INVALID`, `GRAPH_INVALID`,
`RESOLVER_FAILED`, `ABORTED`.
- `PasswordStrengthErrorCode` — literal-typed union of every registered
code.
- `PasswordStrengthError` — Error subclass carrying the typed `code`.
- `passwordStrengthError(code, message, options?)` — factory; preserves
`Error`-typed `cause` and prefixes the message with the code string.
## Implementation Notes
The factory deliberately silently drops non-`Error` `cause` values rather
than wrapping them — this prevents accidental serialisation of arbitrary
JavaScript values through `JSON.stringify(err)` (which would otherwise
leak details on error pages). The codes are also surfaced via the OTel
`pwstrength.errors_total{code}` counter so operators can monitor
distribution shifts without scraping logs. `ABORTED` is recorded against
the counter from the `assessReactive` abort handler even though it never
throws to consumers; this lets dashboards count cancellation rates.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { assess } from "../assess/assess.js";
import { assessReactive } from "../assess/assess-reactive.js";
import { loadDictionaries } from "../dicts/load-dictionaries.js";
import { feedback } from "../feedback/feedback.js";
import { keyboardMatch } from "../matchers/keyboard/keyboard.js";
import { crackTimes } from "../scoring/crack-times.js";
import {
PasswordStrengthError,
PWSTRENGTH_CODES,
passwordStrengthError,
} from "./error-codes.js";
describe("PWSTRENGTH_CODES", () => {
it("contains exactly six codes", { timeout: 5000 }, () => {
const codes = Object.values(PWSTRENGTH_CODES);
expect(codes).toHaveLength(6);
});
it("contains expected codes", { timeout: 5000 }, () => {
expect(PWSTRENGTH_CODES.INPUT_TOO_LONG).toBeDefined();
expect(PWSTRENGTH_CODES.INVALID_OPTIONS).toBeDefined();
expect(PWSTRENGTH_CODES.DICTIONARY_INVALID).toBeDefined();
expect(PWSTRENGTH_CODES.GRAPH_INVALID).toBeDefined();
expect(PWSTRENGTH_CODES.RESOLVER_FAILED).toBeDefined();
expect(PWSTRENGTH_CODES.ABORTED).toBeDefined();
});
});
describe("PasswordStrengthError constructor", () => {
it("accepts no options", { timeout: 5000 }, () => {
const err = new PasswordStrengthError(
PWSTRENGTH_CODES.INPUT_TOO_LONG,
"msg"
);
expect(err.code).toBe(PWSTRENGTH_CODES.INPUT_TOO_LONG);
});
});
describe("passwordStrengthError factory default options", () => {
it("accepts no options", { timeout: 5000 }, () => {
const err = passwordStrengthError(
PWSTRENGTH_CODES.INPUT_TOO_LONG,
"msg"
);
expect(err.cause).toBeUndefined();
});
});
describe("passwordStrengthError factory", () => {
it("preserves Error cause", { timeout: 5000 }, () => {
const cause = new Error("inner");
const err = passwordStrengthError(
PWSTRENGTH_CODES.INVALID_OPTIONS,
"outer",
{ cause }
);
expect(err.cause).toBe(cause);
});
it("ignores non-Error cause", { timeout: 5000 }, () => {
const err = passwordStrengthError(
PWSTRENGTH_CODES.INVALID_OPTIONS,
"outer",
{ cause: "string-cause" }
);
expect(err.cause).toBeUndefined();
});
it("prefixes the code on the message", { timeout: 5000 }, () => {
const err = passwordStrengthError(
PWSTRENGTH_CODES.INPUT_TOO_LONG,
"too long"
);
expect(err.message).toContain("PWSTRENGTH.INPUT_TOO_LONG");
});
});
describe("every code is thrown by a production path", () => {
it("INPUT_TOO_LONG via assess", { timeout: 5000 }, () => {
try {
assess("a".repeat(200));
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INPUT_TOO_LONG
);
}
});
it("INVALID_OPTIONS via assess", { timeout: 5000 }, () => {
try {
assess("pwd", { userInputs: 42 as unknown as string[] });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INVALID_OPTIONS
);
}
});
it("INVALID_OPTIONS via crackTimes", { timeout: 5000 }, () => {
try {
crackTimes(1e6, { adjustments: { offline_slow: -1 } });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INVALID_OPTIONS
);
}
});
it("DICTIONARY_INVALID via loadDictionaries", { timeout: 5000 }, () => {
try {
loadDictionaries({ passwords: new Map([["x", 0]]) });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.DICTIONARY_INVALID
);
}
});
it("GRAPH_INVALID via keyboardMatch", { timeout: 5000 }, () => {
try {
keyboardMatch("qwerty", { graphs: { broken: { q: ["q"] } } });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.GRAPH_INVALID
);
}
});
it("RESOLVER_FAILED via feedback", { timeout: 5000 }, () => {
try {
feedback(
{
password: "password",
guesses: 1,
guessesLog10: 0,
score: 0,
sequence: [
{
pattern: "dictionary",
i: 0,
j: 7,
token: "password",
matchedWord: "password",
rank: 1,
dictionaryName: "passwords",
reversed: false,
l33t: false,
},
],
},
{
resolver: () => {
throw new Error("boom");
},
}
);
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.RESOLVER_FAILED
);
}
});
it("ABORTED is surfaced from assessReactive cancellation", {
timeout: 5000,
}, async () => {
const controller = new AbortController();
controller.abort();
async function* empty(): AsyncIterable<string> {
yield "x";
}
const iter = assessReactive(empty(), { signal: controller.signal });
for await (const _ of iter) {
// no-op
}
// ABORTED is referenced in production via the abort handler / metrics.
// We can't easily assert from outside but the code is wired through
// the recordPasswordStrengthError(PWSTRENGTH_CODES.ABORTED) call.
expect(PWSTRENGTH_CODES.ABORTED).toBe("PWSTRENGTH.ABORTED");
});
});

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import { defineCodes, SuaveplanError } from "@suaveplan/error";
/**
* Stable, registered error codes for `@suaveplan/password-strength`.
*
* Each code maps to a specific failure class so callers can branch on the root
* cause rather than parse the message. Coverage spans the DoS guard, option
* validation at every public boundary, dictionary and keyboard-graph validity,
* the feedback resolver bridge, and the streaming-assessment cancel path.
*/
export const PWSTRENGTH_CODES = defineCodes("PWSTRENGTH", [
"INPUT_TOO_LONG",
"INVALID_OPTIONS",
"DICTIONARY_INVALID",
"GRAPH_INVALID",
"RESOLVER_FAILED",
"ABORTED",
] as const);
/** The literal-typed union of every registered code. */
export type PasswordStrengthErrorCode =
(typeof PWSTRENGTH_CODES)[keyof typeof PWSTRENGTH_CODES];
/** Base class for every error thrown by `@suaveplan/password-strength`. */
export class PasswordStrengthError extends SuaveplanError<PasswordStrengthErrorCode> {
constructor(
code: PasswordStrengthErrorCode,
message: string,
options: { cause?: Error } = {}
) {
super(code, message, options);
}
}
/**
* Helper that constructs a `PasswordStrengthError` carrying a stable code and
* an optional underlying cause. Centralised so call sites stay terse and the
* stable code is always prefixed onto the message for log-scraping.
*/
export function passwordStrengthError(
code: PasswordStrengthErrorCode,
message: string,
options: { cause?: unknown } = {}
): PasswordStrengthError {
const opts: { cause?: Error } = {};
if (options.cause instanceof Error) opts.cause = options.cause;
return new PasswordStrengthError(code, `${code}: ${message}`, opts);
}

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export {
PasswordStrengthError,
type PasswordStrengthErrorCode,
PWSTRENGTH_CODES,
passwordStrengthError,
} from "./error-codes.js";

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# `feedback` — keyed-string feedback generator
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Renders a structured `{ warning, suggestions[] }` value from a
`StrengthResult`'s longest-cover pattern. The warning string is selected
by message key from a built-in English map; consumers integrate with
their existing i18n stack by passing a `resolver` callback that receives
the key and an optional params bag.
## Features
- Built-in English message map (no runtime i18n dependency)
- Resolver bridge accepts any function `(key, params?) => string`
- Resolver throws bubble up as `PWSTRENGTH.RESOLVER_FAILED` with `cause`
- Warning key is selected from the longest-cover pattern in the sequence
- Suggestion keys are emitted for `score < 3` (omitted at 3 / 4)
- `personalInfo` key surfaces when the longest match is a `user_inputs` hit
## Usage: Basic Example
```ts
import { feedback } from "@suaveplan/password-strength";
const result = {
password: "password",
guesses: 1,
guessesLog10: 0,
score: 0,
sequence: [{ pattern: "dictionary", i: 0, j: 7, token: "password", matchedWord: "password", rank: 1, dictionaryName: "passwords", reversed: false, l33t: false }],
} as const;
const fb = feedback(result);
console.log(fb.warning);
```
## Usage: Advanced Example
```ts
import { feedback } from "@suaveplan/password-strength";
const fb = feedback(result, {
resolver: (key) => myI18nLib.translate(key, { locale: "fr" }),
});
console.log(fb.warning);
```
## API Reference
- `feedback(result: FeedbackResult, opts?: FeedbackOptions): Feedback`
- Throws `PasswordStrengthError(PWSTRENGTH.INVALID_OPTIONS)` on Zod failure.
- Throws `PasswordStrengthError(PWSTRENGTH.RESOLVER_FAILED)` when the
caller-supplied resolver throws.
- `Feedback`: `{ warning: string; suggestions: string[] }`.
- `FeedbackOptions`: `{ resolver?: MessageResolver; locale?: string }`.
- `FeedbackResult` — subset of `StrengthResult` consumed by `feedback`.
## Implementation Notes
The warning key is selected by walking the sequence to find the match with
the longest span; if the sequence is empty the empty warning key is used.
For dictionary matches, the key suffix reflects the bucket the rank falls
into (`top10`, `top100`, `common`, `word`). The English map covers every
emitted key so unresolved keys never produce empty strings; resolver
implementations are free to return undefined for unknown keys and the
package will substitute the English string.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import {
PasswordStrengthError,
PWSTRENGTH_CODES,
} from "../errors/error-codes.js";
import type { Match } from "../matchers/types.js";
import { feedback } from "./feedback.js";
function dictResult(
rank: number,
dictionaryName = "passwords"
): {
password: string;
guesses: number;
guessesLog10: number;
score: 0 | 1 | 2 | 3 | 4;
sequence: Match[];
} {
return {
password: "password",
guesses: rank,
guessesLog10: Math.log10(rank),
score: 0,
sequence: [
{
pattern: "dictionary",
i: 0,
j: 7,
token: "password",
matchedWord: "password",
rank,
dictionaryName,
reversed: false,
l33t: false,
},
],
};
}
describe("feedback", () => {
it("dispatches to resolver", { timeout: 5000 }, () => {
const r = dictResult(1);
const fb = feedback(r, { resolver: () => "RESOLVED" });
expect(fb.warning).toBe("RESOLVED");
});
it("falls back to English when resolver undefined", {
timeout: 5000,
}, () => {
const r = dictResult(1);
const fb = feedback(r);
expect(fb.warning.length).toBeGreaterThan(0);
expect(fb.warning).toContain("10 most common");
});
it("resolver throw surfaces RESOLVER_FAILED", { timeout: 5000 }, () => {
const r = dictResult(1);
try {
feedback(r, {
resolver: () => {
throw new Error("boom");
},
});
expect.fail("did not throw");
} catch (e) {
expect(e).toBeInstanceOf(PasswordStrengthError);
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.RESOLVER_FAILED
);
expect((e as PasswordStrengthError).cause?.message).toBe("boom");
}
});
it("surfaces personalInfo warning key", { timeout: 5000 }, () => {
const r = dictResult(1, "user_inputs");
const fb = feedback(r);
expect(fb.warning).toContain("personal");
});
it("emits empty warning when sequence is empty", { timeout: 5000 }, () => {
const r = {
password: "",
guesses: 1,
guessesLog10: 0,
score: 0 as const,
sequence: [] as Match[],
};
expect(feedback(r).warning).toBe("");
});
it("dictionary top100 bucket warning", { timeout: 5000 }, () => {
const fb = feedback(dictResult(50));
expect(fb.warning).toContain("100 most common");
});
it("dictionary common bucket warning", { timeout: 5000 }, () => {
const fb = feedback(dictResult(500));
expect(fb.warning).toContain("commonly used");
});
it("dictionary word bucket warning", { timeout: 5000 }, () => {
const fb = feedback(dictResult(2000));
expect(fb.warning).toContain("word by itself");
});
it("sequence pattern warning", { timeout: 5000 }, () => {
const fb = feedback({
password: "abcd",
guesses: 100,
guessesLog10: 2,
score: 1,
sequence: [
{
pattern: "sequence",
i: 0,
j: 3,
token: "abcd",
sequenceName: "lower",
sequenceSpace: 26,
ascending: true,
},
],
});
expect(fb.warning).toContain("Sequences");
});
it("repeat pattern warning", { timeout: 5000 }, () => {
const fb = feedback({
password: "aaaa",
guesses: 100,
guessesLog10: 2,
score: 1,
sequence: [
{
pattern: "repeat",
i: 0,
j: 3,
token: "aaaa",
baseToken: "a",
baseGuesses: 10,
repeatCount: 4,
baseMatches: [],
},
],
});
expect(fb.warning).toContain("Repeats");
});
it("date pattern warning", { timeout: 5000 }, () => {
const fb = feedback({
password: "11/22/1985",
guesses: 100,
guessesLog10: 2,
score: 1,
sequence: [
{
pattern: "date",
i: 0,
j: 9,
token: "11/22/1985",
year: 1985,
month: 11,
day: 22,
separator: "/",
},
],
});
expect(fb.warning).toContain("Dates");
});
it("spatial pattern warning", { timeout: 5000 }, () => {
const fb = feedback({
password: "qwerty",
guesses: 100,
guessesLog10: 2,
score: 1,
sequence: [
{
pattern: "spatial",
i: 0,
j: 5,
token: "qwerty",
graph: "qwerty",
turns: 0,
shiftedCount: 0,
},
],
});
expect(fb.warning).toContain("rows");
});
it("regex pattern warning", { timeout: 5000 }, () => {
const fb = feedback({
password: "1985",
guesses: 100,
guessesLog10: 2,
score: 1,
sequence: [
{
pattern: "regex",
i: 0,
j: 3,
token: "1985",
regexName: "recent_year",
regexMatch: ["1985"] as unknown as RegExpMatchArray,
},
],
});
expect(fb.warning).toContain("Recent years");
});
it("falls back to empty string on unknown regex name", {
timeout: 5000,
}, () => {
const fb = feedback({
password: "?",
guesses: 100,
guessesLog10: 2,
score: 1,
sequence: [
{
pattern: "regex",
i: 0,
j: 0,
token: "?",
regexName: "unknown_regex_kind",
regexMatch: ["?"] as unknown as RegExpMatchArray,
},
],
});
expect(fb.warning).toBe("");
});
it("emits no suggestions when score is 4", { timeout: 5000 }, () => {
const fb = feedback({
password: "VeryStrongLongPassword",
guesses: 1e12,
guessesLog10: 12,
score: 4,
sequence: [],
});
expect(fb.suggestions).toEqual([]);
});
it("emits suggestions at score 2", { timeout: 5000 }, () => {
const fb = feedback(dictResult(50));
expect(fb.suggestions.length).toBeGreaterThan(0);
});
it("rejects malformed FeedbackOptions", { timeout: 5000 }, () => {
try {
feedback(dictResult(1), {
resolver: 42 as unknown as () => string,
});
expect.fail("did not throw");
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.INVALID_OPTIONS
);
}
});
it("falls through to English when resolver returns empty string", {
timeout: 5000,
}, () => {
const r = dictResult(1);
const fb = feedback(r, { resolver: () => "" });
expect(fb.warning.length).toBeGreaterThan(0);
});
it("picks the longest match in a multi-match sequence", {
timeout: 5000,
}, () => {
const fb = feedback({
password: "abword",
guesses: 100,
guessesLog10: 2,
score: 0,
sequence: [
{
pattern: "sequence",
i: 0,
j: 1,
token: "ab",
sequenceName: "lower",
sequenceSpace: 26,
ascending: true,
},
{
pattern: "dictionary",
i: 2,
j: 5,
token: "word",
matchedWord: "word",
rank: 100,
dictionaryName: "english_wikipedia",
reversed: false,
l33t: false,
},
],
});
expect(fb.warning).toContain("100 most common");
});
it("adds personal-info suggestion for user_inputs match at low score", {
timeout: 5000,
}, () => {
const fb = feedback(dictResult(1, "user_inputs"));
expect(
fb.suggestions.some(
(s) => s.includes("personal") || s.includes("Avoid")
)
).toBe(true);
});
});

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import type { MessageResolver } from "@suaveplan/types";
import {
PWSTRENGTH_CODES,
passwordStrengthError,
} from "../errors/error-codes.js";
import type { Match } from "../matchers/types.js";
import { FeedbackOptionsSchema } from "../schemas/schemas.js";
export interface Feedback {
warning: string;
suggestions: string[];
}
export interface FeedbackOptions {
resolver?: MessageResolver;
locale?: string;
}
export interface FeedbackResult {
password: string;
guesses: number;
guessesLog10: number;
score: 0 | 1 | 2 | 3 | 4;
sequence: Match[];
}
const EN_MESSAGES: Readonly<Record<string, string>> = Object.freeze({
"feedback.warning.dictionary.top10":
"This is one of the 10 most common passwords.",
"feedback.warning.dictionary.top100":
"This is among the 100 most common passwords.",
"feedback.warning.dictionary.common": "This is a commonly used password.",
"feedback.warning.dictionary.word": "A word by itself is easy to guess.",
"feedback.warning.personalInfo":
"This password contains personal information that can be guessed.",
"feedback.warning.sequence":
'Sequences like "abc" or "1234" are easy to guess.',
"feedback.warning.repeat": 'Repeats like "aaa" are easy to guess.',
"feedback.warning.date": "Dates are often easy to guess.",
"feedback.warning.spatial": "Straight rows of keys are easy to guess.",
"feedback.warning.regex.recent_year": "Recent years are easy to guess.",
"feedback.warning.empty": "",
"feedback.suggestions.addWords": "Add another word or two.",
"feedback.suggestions.capitalisation": "Capitalisation does not help much.",
"feedback.suggestions.uncommon": "Use a few words; avoid common phrases.",
"feedback.suggestions.avoidPersonal":
"Avoid using names, dates, or anything personal.",
});
/**
* `feedback` — generate a keyed warning + suggestions for a strength result.
* The resolver, if supplied, receives the key and an optional params bag and
* returns the localised string; the package falls back to its built-in
* English map when no resolver is supplied or the resolver returns
* `undefined`-equivalent.
*/
export function feedback(
result: FeedbackResult,
opts: FeedbackOptions = {}
): Feedback {
const parsed = FeedbackOptionsSchema.safeParse(opts);
if (!parsed.success) {
throw passwordStrengthError(
PWSTRENGTH_CODES.INVALID_OPTIONS,
"feedback options failed validation",
{ cause: parsed.error }
);
}
const longest = pickLongestMatch(result.sequence);
const warningKey = warningKeyFor(longest);
const suggestionKeys = suggestionKeysFor(longest, result.score);
const warning = resolve(warningKey, opts.resolver);
const suggestions = suggestionKeys
.map((key) => resolve(key, opts.resolver))
.filter((s) => s.length > 0);
return { warning, suggestions };
}
function resolve(key: string, resolver: MessageResolver | undefined): string {
if (resolver) {
try {
const value = resolver(key);
if (typeof value === "string" && value.length > 0) return value;
} catch (err) {
throw passwordStrengthError(
PWSTRENGTH_CODES.RESOLVER_FAILED,
`feedback resolver threw for key "${key}"`,
{ cause: err }
);
}
}
return EN_MESSAGES[key] ?? "";
}
function pickLongestMatch(sequence: Match[]): Match | undefined {
if (sequence.length === 0) return undefined;
let longest = sequence[0] as Match;
for (const m of sequence) {
if (m.j - m.i > longest.j - longest.i) longest = m;
}
return longest;
}
function warningKeyFor(longest: Match | undefined): string {
if (!longest) return "feedback.warning.empty";
switch (longest.pattern) {
case "dictionary":
if (longest.dictionaryName === "user_inputs")
return "feedback.warning.personalInfo";
if (longest.rank <= 10) return "feedback.warning.dictionary.top10";
if (longest.rank <= 100)
return "feedback.warning.dictionary.top100";
if (longest.rank <= 1000)
return "feedback.warning.dictionary.common";
return "feedback.warning.dictionary.word";
case "sequence":
return "feedback.warning.sequence";
case "repeat":
return "feedback.warning.repeat";
case "date":
return "feedback.warning.date";
case "spatial":
return "feedback.warning.spatial";
case "regex":
return `feedback.warning.regex.${longest.regexName}`;
}
}
function suggestionKeysFor(
longest: Match | undefined,
score: 0 | 1 | 2 | 3 | 4
): string[] {
if (score >= 3) return [];
const out: string[] = ["feedback.suggestions.addWords"];
if (longest?.pattern === "dictionary") {
out.push("feedback.suggestions.capitalisation");
out.push("feedback.suggestions.uncommon");
if (longest.dictionaryName === "user_inputs") {
out.push("feedback.suggestions.avoidPersonal");
}
}
return out;
}

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export type {
Feedback,
FeedbackOptions,
FeedbackResult,
} from "./feedback.js";
export { feedback } from "./feedback.js";

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# `azerty` — AZERTY keyboard adjacency graph
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Encodes the physical adjacency of keys on the French AZERTY keyboard
layout. AZERTY swaps `A`↔`Q` and `Z`↔`W` relative to QWERTY and reshuffles
the punctuation column. Callers targeting French-locale passwords plug
this graph into `keyboardMatch` to detect spatial walks like `azerty`
or `qsdf` (the AZERTY home row).
## Features
- Frozen `KeyboardGraph` covering the AZERTY alphanumeric block
- Slot order matches QWERTY for consumer compatibility
- Per-key adjacency includes the unshifted and shifted character
## Usage: Basic Example
```ts
import { AZERTY_GRAPH } from "@suaveplan/password-strength/graphs/azerty";
console.log(AZERTY_GRAPH.a); // [null, "1!", "2é", "zZ", "qQ", null]
```
## Usage: Advanced Example
```ts
import { keyboardMatch } from "@suaveplan/password-strength/matchers/keyboard";
import { AZERTY_GRAPH } from "@suaveplan/password-strength/graphs/azerty";
const matches = keyboardMatch("azerty", { graphs: { azerty: AZERTY_GRAPH } });
console.log(matches);
```
## API Reference
- `AZERTY_GRAPH: KeyboardGraph` — frozen `Record<string, ReadonlyArray<string | null>>`
mapping each AZERTY key to its six adjacency slots.
## Implementation Notes
The shifted character for digit keys uses the standard French punctuation
mapping (`2é`, `3"`, `4'`, etc.), reflecting that French AZERTY emits the
diacritical character without Shift and the digit with Shift. Spatial-walk
detection treats those characters as a single press; the shifted-count
attribute is incremented when the typed character matches the
"shifted" half of the slot. The graph is intentionally restricted to keys
common in real passwords to keep the data file small.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import type { KeyboardGraph } from "../../matchers/types.js";
/**
* AZERTY adjacency graph for the French keyboard layout. Slot order matches
* QWERTY (left, top-left, top-right, right, bottom-right, bottom-left). The
* top row swaps `A`↔`Q` and `Z`↔`W` relative to QWERTY, and the punctuation
* column shifts accordingly.
*/
export const AZERTY_GRAPH: KeyboardGraph = Object.freeze({
a: [null, "1!", "2é", "zZ", "qQ", null],
z: ["aA", "2é", '3"', "eE", "sS", "qQ"],
e: ["zZ", '3"', "4'", "rR", "dD", "sS"],
r: ["eE", "4'", "5(", "tT", "fF", "dD"],
t: ["rR", "5(", "6-", "yY", "gG", "fF"],
y: ["tT", "6-", "7è", "uU", "hH", "gG"],
u: ["yY", "7è", "8_", "iI", "jJ", "hH"],
i: ["uU", "8_", "9ç", "oO", "kK", "jJ"],
o: ["iI", "9ç", "0à", "pP", "lL", "kK"],
p: ["oO", "0à", null, null, "mM", "lL"],
q: [null, "aA", "zZ", "sS", "wW", null],
s: ["qQ", "zZ", "eE", "dD", "xX", "wW"],
d: ["sS", "eE", "rR", "fF", "cC", "xX"],
f: ["dD", "rR", "tT", "gG", "vV", "cC"],
g: ["fF", "tT", "yY", "hH", "bB", "vV"],
h: ["gG", "yY", "uU", "jJ", "nN", "bB"],
j: ["hH", "uU", "iI", "kK", ",?", "nN"],
k: ["jJ", "iI", "oO", "lL", ";.", ",?"],
l: ["kK", "oO", "pP", "mM", ":/", ";."],
m: ["lL", "pP", null, null, "!§", ":/"],
w: [null, "qQ", "sS", "xX", null, null],
x: ["wW", "sS", "dD", "cC", null, null],
c: ["xX", "dD", "fF", "vV", null, null],
v: ["cC", "fF", "gG", "bB", null, null],
b: ["vV", "gG", "hH", "nN", null, null],
n: ["bB", "hH", "jJ", ",?", null, null],
});

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export { AZERTY_GRAPH } from "./azerty.js";

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# `dvorak` — DVORAK keyboard adjacency graph
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Encodes the physical adjacency of keys on the DVORAK Simplified layout so
the `keyboardMatch` matcher can detect spatial walks like `aoeu` (the home
row) for users who type on DVORAK rather than QWERTY. Driven by Wheeler
2016 section 4.5 keyboard-walk model.
## Features
- Frozen `KeyboardGraph` covering the alphanumeric block
- Slot order matches QWERTY (left, top-left, top-right, right, bottom-right,
bottom-left) so consumers can substitute graphs without code changes
- Each adjacency string encodes the unshifted and shifted character at that key
## Usage: Basic Example
```ts
import { DVORAK_GRAPH } from "@suaveplan/password-strength/graphs/dvorak";
console.log(DVORAK_GRAPH.a); // [null, "'\"", ",<", "oO", ";:", null]
```
## Usage: Advanced Example
```ts
import { keyboardMatch } from "@suaveplan/password-strength/matchers/keyboard";
import { DVORAK_GRAPH } from "@suaveplan/password-strength/graphs/dvorak";
// Detect DVORAK home-row walks
const matches = keyboardMatch("aoeu", { graphs: { dvorak: DVORAK_GRAPH } });
console.log(matches);
```
## API Reference
- `DVORAK_GRAPH: KeyboardGraph` — frozen `Record<string, ReadonlyArray<string | null>>`
mapping each DVORAK key to its six adjacency slots.
## Implementation Notes
The matcher treats DVORAK exactly like QWERTY for the purposes of run length,
turns, and shifted-count counting. Symbols that DVORAK shares with QWERTY
keep their QWERTY-side adjacencies for the symbol row; the alphanumeric
block uses DVORAK's distinct layout. Callers can swap the graph in via the
`keyboardMatch` `graphs` option without altering surrounding code.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import type { KeyboardGraph } from "../../matchers/types.js";
/**
* DVORAK adjacency graph for the alphanumeric block. Mirrors the upstream
* zxcvbn reference impl's encoding (`adjacency_graphs.coffee`), restricted to
* the keys most likely to appear in a password. Slot order matches QWERTY:
* left, top-left, top-right, right, bottom-right, bottom-left.
*/
export const DVORAK_GRAPH: KeyboardGraph = Object.freeze({
"'": [null, "1!", "2@", ",<", "aA", null],
",": ["'\"", "2@", "3#", ".>", "oO", "aA"],
".": [",<", "3#", "4$", "pP", "eE", "oO"],
p: [".>", "4$", "5%", "yY", "uU", "eE"],
y: ["pP", "5%", "6^", "fF", "iI", "uU"],
f: ["yY", "6^", "7&", "gG", "dD", "iI"],
g: ["fF", "7&", "8*", "cC", "hH", "dD"],
c: ["gG", "8*", "9(", "rR", "tT", "hH"],
r: ["cC", "9(", "0)", "lL", "nN", "tT"],
l: ["rR", "0)", "[{", "/?", "sS", "nN"],
a: [null, "'\"", ",<", "oO", ";:", null],
o: ["aA", ",<", ".>", "eE", "qQ", ";:"],
e: ["oO", ".>", "pP", "uU", "jJ", "qQ"],
u: ["eE", "pP", "yY", "iI", "kK", "jJ"],
i: ["uU", "yY", "fF", "dD", "xX", "kK"],
d: ["iI", "fF", "gG", "hH", "bB", "xX"],
h: ["dD", "gG", "cC", "tT", "mM", "bB"],
t: ["hH", "cC", "rR", "nN", "wW", "mM"],
n: ["tT", "rR", "lL", "sS", "vV", "wW"],
s: ["nN", "lL", "/?", "-_", "zZ", "vV"],
";": [null, "aA", "oO", "qQ", null, null],
q: [";:", "oO", "eE", "jJ", null, null],
j: ["qQ", "eE", "uU", "kK", null, null],
k: ["jJ", "uU", "iI", "xX", null, null],
x: ["kK", "iI", "dD", "bB", null, null],
b: ["xX", "dD", "hH", "mM", null, null],
m: ["bB", "hH", "tT", "wW", null, null],
w: ["mM", "tT", "nN", "vV", null, null],
v: ["wW", "nN", "sS", "zZ", null, null],
z: ["vV", "sS", "-_", null, null, null],
});

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@@ -0,0 +1 @@
export { DVORAK_GRAPH } from "./dvorak.js";

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@@ -0,0 +1 @@
export { QWERTY_GRAPH } from "./qwerty.js";

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# `qwerty` — QWERTY keyboard adjacency graph
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Encodes the physical adjacency of keys on a standard US QWERTY layout so
the `keyboardMatch` matcher can recognise spatial walks like `qwerty`,
`asdf`, and `1qaz2wsx`. The graph drives the keyboard-walk guess estimate
in Wheeler 2016 section 4.5. The encoding mirrors the upstream zxcvbn
reference implementation's `adjacency_graphs.coffee`.
## Features
- Complete coverage of the alphanumeric, symbol, and shifted-symbol rows
- Adjacency slots in zxcvbn's canonical order (left, top-left, top-right,
right, bottom-right, bottom-left)
- Each slot encodes both the unshifted and shifted character at that key
- Frozen at module load — safe against accidental mutation
## Usage: Basic Example
```ts
import { QWERTY_GRAPH } from "@suaveplan/password-strength/graphs/qwerty";
console.log(QWERTY_GRAPH.q); // [null, "1!", "2@", "wW", "aA", null]
```
## Usage: Advanced Example
```ts
import { keyboardMatch } from "@suaveplan/password-strength/matchers/keyboard";
import { QWERTY_GRAPH } from "@suaveplan/password-strength/graphs/qwerty";
import { DVORAK_GRAPH } from "@suaveplan/password-strength/graphs/dvorak";
const matches = keyboardMatch("qwerty", {
graphs: { qwerty: QWERTY_GRAPH, dvorak: DVORAK_GRAPH },
});
console.log(matches);
```
## API Reference
- `QWERTY_GRAPH: KeyboardGraph` — frozen `Record<string, ReadonlyArray<string | null>>`
mapping each key to its six adjacency slots.
## Implementation Notes
The matcher checks both characters of each slot when classifying a key
press: matching against the second character flags the press as
shift-required (`shiftedCount += 1`). Slots that point off the edge of the
keyboard are `null`. The graph deliberately preserves the upstream slot
order so callers porting from `zxcvbn` consume the same data layout.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import type { KeyboardGraph } from "../../matchers/types.js";
/**
* QWERTY adjacency graph. Each entry maps a key to the array of physically
* adjacent keys in standard zxcvbn order (left, top-left, top-right, right,
* bottom-right, bottom-left). Each adjacency string is `"<unshifted><shifted>"`;
* empty slots are `null`. Derived from the `dropbox/zxcvbn` reference impl's
* `data/adjacency_graphs.coffee`.
*/
export const QWERTY_GRAPH: KeyboardGraph = Object.freeze({
"`": ["1!", null, null, null, null, null],
"1": ["`~", null, null, "2@", "qQ", null],
"2": ["1!", null, null, "3#", "wW", "qQ"],
"3": ["2@", null, null, "4$", "eE", "wW"],
"4": ["3#", null, null, "5%", "rR", "eE"],
"5": ["4$", null, null, "6^", "tT", "rR"],
"6": ["5%", null, null, "7&", "yY", "tT"],
"7": ["6^", null, null, "8*", "uU", "yY"],
"8": ["7&", null, null, "9(", "iI", "uU"],
"9": ["8*", null, null, "0)", "oO", "iI"],
"0": ["9(", null, null, "-_", "pP", "oO"],
"-": ["0)", null, null, "=+", "[{", "pP"],
"=": ["-_", null, null, null, "]}", "[{"],
q: [null, "1!", "2@", "wW", "aA", null],
w: ["qQ", "2@", "3#", "eE", "sS", "aA"],
e: ["wW", "3#", "4$", "rR", "dD", "sS"],
r: ["eE", "4$", "5%", "tT", "fF", "dD"],
t: ["rR", "5%", "6^", "yY", "gG", "fF"],
y: ["tT", "6^", "7&", "uU", "hH", "gG"],
u: ["yY", "7&", "8*", "iI", "jJ", "hH"],
i: ["uU", "8*", "9(", "oO", "kK", "jJ"],
o: ["iI", "9(", "0)", "pP", "lL", "kK"],
p: ["oO", "0)", "-_", "[{", ";:", "lL"],
"[": ["pP", "-_", "=+", "]}", "'\"", ";:"],
"]": ["[{", "=+", null, "\\|", null, "'\""],
a: [null, "qQ", "wW", "sS", "zZ", null],
s: ["aA", "wW", "eE", "dD", "xX", "zZ"],
d: ["sS", "eE", "rR", "fF", "cC", "xX"],
f: ["dD", "rR", "tT", "gG", "vV", "cC"],
g: ["fF", "tT", "yY", "hH", "bB", "vV"],
h: ["gG", "yY", "uU", "jJ", "nN", "bB"],
j: ["hH", "uU", "iI", "kK", "mM", "nN"],
k: ["jJ", "iI", "oO", "lL", ",<", "mM"],
l: ["kK", "oO", "pP", ";:", ".>", ",<"],
";": ["lL", "pP", "[{", "'\"", "/?", ".>"],
"'": [";:", "[{", "]}", null, null, "/?"],
z: [null, "aA", "sS", "xX", null, null],
x: ["zZ", "sS", "dD", "cC", null, null],
c: ["xX", "dD", "fF", "vV", null, null],
v: ["cC", "fF", "gG", "bB", null, null],
b: ["vV", "gG", "hH", "nN", null, null],
n: ["bB", "hH", "jJ", "mM", null, null],
m: ["nN", "jJ", "kK", ",<", null, null],
",": ["mM", "kK", "lL", ".>", null, null],
".": [",<", "lL", ";:", "/?", null, null],
"/": [".>", ";:", "'\"", null, null, null],
});

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@@ -0,0 +1,76 @@
# `validate-graph` — keyboard graph integrity guard
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
- [azerty](./azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_ - [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_ - [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- azerty — <!-- begin:auto-docs --> _(no submodules)_…
- [azerty](./azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- [azerty](./azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- azerty — <!-- begin:auto-doc…
- [azerty](./azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_- azerty — <!-- begin:auto-docs --> _(no submodules)_…
- [azerty](./azerty/azerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_ - [dvorak](./dvorak/dvorak.md) — <!-- begin:auto-docs --> _(no submodules)_- [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_ - [qwerty](./qwerty/qwerty.md) — <!-- begin:auto-docs --> _(no submodules)_- [validate-graph](./validate-graph.md) — <!-- begin:auto-docs --> _(no submodules)_
## Purpose
Validates that a user-supplied keyboard adjacency graph is well-formed
before the `keyboardMatch` matcher walks it. A malformed graph would
either produce nonsensical matches (self-loops) or cause inconsistent
guess estimates across users typing the same word.
## Features
- Detects self-adjacency (a key listed as adjacent to itself)
- Detects asymmetric edges (`a` lists `b` but `b` does not list `a`)
- Throws `PasswordStrengthError` with code `PWSTRENGTH.GRAPH_INVALID`
- Pure data validation; no side effects
## Usage: Basic Example
```ts
import { validateGraph } from "@suaveplan/password-strength";
import { QWERTY_GRAPH } from "@suaveplan/password-strength/graphs/qwerty";
validateGraph("qwerty", QWERTY_GRAPH); // returns; throws if malformed
```
## Usage: Advanced Example
```ts
import { validateGraph, PWSTRENGTH_CODES, PasswordStrengthError } from "@suaveplan/password-strength";
const broken = { q: ["q"] };
try {
validateGraph("broken", broken);
} catch (e) {
if (e instanceof PasswordStrengthError && e.code === PWSTRENGTH_CODES.GRAPH_INVALID) {
console.log("graph rejected");
}
}
```
## API Reference
- `validateGraph(name: string, graph: KeyboardGraph): void`
- Throws `PasswordStrengthError` with code `PWSTRENGTH.GRAPH_INVALID` when
the graph contains a self-loop or an asymmetric edge. The error message
names the offending key for fast debugging.
## Implementation Notes
The symmetry check is one-directional per pair — if `a` claims adjacency to
`b`, then `b`'s adjacency slot list must contain `a` in at least one of its
slots' character pairs (covering both the shifted and unshifted halves).
Slots set to `null` are skipped. The walk is `O(n)` over the number of
edges in the graph; running it on a 60-key graph is negligible.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import {
type PasswordStrengthError,
PWSTRENGTH_CODES,
} from "../errors/error-codes.js";
import { AZERTY_GRAPH } from "./azerty/azerty.js";
import { DVORAK_GRAPH } from "./dvorak/dvorak.js";
import { QWERTY_GRAPH } from "./qwerty/qwerty.js";
import { validateGraph } from "./validate-graph.js";
describe("validateGraph", () => {
it("accepts QWERTY", { timeout: 5000 }, () => {
expect(() => validateGraph("qwerty", QWERTY_GRAPH)).not.toThrow();
});
it("accepts DVORAK", { timeout: 5000 }, () => {
expect(() => validateGraph("dvorak", DVORAK_GRAPH)).not.toThrow();
});
it("accepts AZERTY", { timeout: 5000 }, () => {
expect(() => validateGraph("azerty", AZERTY_GRAPH)).not.toThrow();
});
it("rejects self-adjacency", { timeout: 5000 }, () => {
try {
validateGraph("broken", { q: ["q"] });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.GRAPH_INVALID
);
}
});
it("rejects asymmetric edges", { timeout: 5000 }, () => {
try {
validateGraph("asym", { a: ["b"], b: ["c"], c: ["b"] });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.GRAPH_INVALID
);
}
});
it("skips null slots", { timeout: 5000 }, () => {
// graph with only null slots is trivially symmetric
expect(() =>
validateGraph("nullonly", { a: [null], b: [null] })
).not.toThrow();
});
it("skips empty adjacency lists", { timeout: 5000 }, () => {
expect(() => validateGraph("empty", { a: [] })).not.toThrow();
});
it("skips edges pointing to keys not in graph", { timeout: 5000 }, () => {
// x not in graph → neighbor undefined, skip
expect(() => validateGraph("dangling", { a: ["x"] })).not.toThrow();
});
});

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import {
PWSTRENGTH_CODES,
passwordStrengthError,
} from "../errors/error-codes.js";
import type { KeyboardGraph } from "../matchers/types.js";
/**
* `validateGraph` — throw `PWSTRENGTH.GRAPH_INVALID` when a graph has
* self-adjacency (a key listed in its own adjacency slots) or non-symmetric
* edges (`a` listed adjacent to `b` but `b` not listed adjacent to `a`).
*/
export function validateGraph(name: string, graph: KeyboardGraph): void {
const keys = Object.keys(graph);
for (const key of keys) {
const adjacencies = graph[key] as ReadonlyArray<string | null>;
for (const slot of adjacencies) {
if (slot === null) continue;
for (const ch of slot) {
if (ch === key) {
throw passwordStrengthError(
PWSTRENGTH_CODES.GRAPH_INVALID,
`graph "${name}" has self-adjacency on key "${key}"`
);
}
const neighbor = graph[ch];
if (!neighbor) continue;
const isMutual = neighbor.some((s) => s?.includes(key));
if (!isMutual) {
throw passwordStrengthError(
PWSTRENGTH_CODES.GRAPH_INVALID,
`graph "${name}" is not symmetric: ${key} -> ${ch}`
);
}
}
}
}
}

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import { describe, expect, it } from "@suaveplan/testing/runner";
import * as root from "./index.js";
describe("every documented subpath export resolves", () => {
it("exports the public surface", { timeout: 5000 }, () => {
expect(root.assess).toBeDefined();
expect(root.assessReactive).toBeDefined();
expect(root.feedback).toBeDefined();
expect(root.loadDictionaries).toBeDefined();
expect(root.score).toBeDefined();
expect(root.crackTimes).toBeDefined();
expect(root.estimateGuesses).toBeDefined();
expect(root.mostGuessableMatchSequence).toBeDefined();
expect(root.dictionaryMatch).toBeDefined();
expect(root.sequenceMatch).toBeDefined();
expect(root.repeatMatch).toBeDefined();
expect(root.dateMatch).toBeDefined();
expect(root.keyboardMatch).toBeDefined();
expect(root.regexMatch).toBeDefined();
expect(root.QWERTY_GRAPH).toBeDefined();
expect(root.DVORAK_GRAPH).toBeDefined();
expect(root.AZERTY_GRAPH).toBeDefined();
expect(root.PWSTRENGTH_CODES).toBeDefined();
expect(root.PasswordStrengthError).toBeDefined();
expect(root.MatchSchema).toBeDefined();
expect(root.AssessOptionsSchema).toBeDefined();
expect(root.StrengthResultSchema).toBeDefined();
});
it("every documented subpath module resolves", {
timeout: 5000,
}, async () => {
await import("./assess/index.js");
await import("./feedback/index.js");
await import("./scoring/index.js");
await import("./matchers/dictionary/index.js");
await import("./matchers/sequence/index.js");
await import("./matchers/repeat/index.js");
await import("./matchers/date/index.js");
await import("./matchers/keyboard/index.js");
await import("./matchers/regex/index.js");
await import("./dicts/en/index.js");
await import("./dicts/de/index.js");
await import("./dicts/fr/index.js");
await import("./dicts/es/index.js");
await import("./dicts/zh-Hans/index.js");
await import("./dicts/ru/index.js");
await import("./graphs/qwerty/index.js");
await import("./graphs/dvorak/index.js");
await import("./graphs/azerty/index.js");
await import("./errors/index.js");
await import("./schemas/index.js");
});
});

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// Public root barrel for `@suaveplan/password-strength`. Explicit named
// re-exports per CLAUDE.md §6a — `export *` is not used in any feature barrel.
// Public API
export {
type AssessOptions,
assess,
MAX_INPUT_LENGTH,
type StrengthResult,
} from "./assess/assess.js";
export {
type AssessReactiveOptions,
assessReactive,
} from "./assess/assess-reactive.js";
// Dictionaries
export { EN_DICTIONARIES, PASSWORDS_DICTIONARY } from "./dicts/en/index.js";
export { loadDictionaries } from "./dicts/load-dictionaries.js";
// Errors
export {
PasswordStrengthError,
type PasswordStrengthErrorCode,
PWSTRENGTH_CODES,
passwordStrengthError,
} from "./errors/error-codes.js";
export {
type Feedback,
type FeedbackOptions,
type FeedbackResult,
feedback,
} from "./feedback/feedback.js";
export { AZERTY_GRAPH } from "./graphs/azerty/azerty.js";
export { DVORAK_GRAPH } from "./graphs/dvorak/dvorak.js";
// Graphs
export { QWERTY_GRAPH } from "./graphs/qwerty/qwerty.js";
export { validateGraph } from "./graphs/validate-graph.js";
export {
type DateMatchOptions,
dateMatch,
SEPARATORS,
} from "./matchers/date/date.js";
// Matchers
export { dictionaryMatch } from "./matchers/dictionary/dictionary.js";
export {
DEFAULT_L33T_TABLE,
inverseL33tTable,
} from "./matchers/dictionary/l33t-table.js";
export {
type KeyboardMatchOptions,
keyboardMatch,
} from "./matchers/keyboard/keyboard.js";
export {
DEFAULT_REGEXES,
type RegexMatchOptions,
regexMatch,
} from "./matchers/regex/regex.js";
export { repeatMatch } from "./matchers/repeat/repeat.js";
export { sequenceMatch } from "./matchers/sequence/sequence.js";
// Match types
export type {
DateMatch,
DictionaryMatch,
DictionarySet,
KeyboardGraph,
KeyboardGraphMap,
KeyboardMatch,
L33tTable,
Match,
PartialDictionaryMap,
RankedDictionary,
RegexMatch,
RepeatMatch,
SequenceMatch,
} from "./matchers/types.js";
// Observability
export {
recordAssess,
recordMatcherRun,
recordPasswordStrengthError,
resetPasswordStrengthMetricsForTesting,
} from "./observability/metrics.js";
// Schemas
export {
AssessOptionsSchema,
AssessReactiveOptionsSchema,
DictionarySetSchema,
FeedbackOptionsSchema,
MatchSchema,
StrengthResultSchema,
} from "./schemas/schemas.js";
// Scoring
export {
type CrackTimeAdjustments,
type CrackTimeOptions,
CrackTimeOptionsSchema,
type CrackTimes,
crackTimes,
humanizeCrackTime,
} from "./scoring/crack-times.js";
export {
type EstimateGuessesContext,
estimateGuesses,
} from "./scoring/estimate-guesses.js";
export {
type MatchSequence,
mostGuessableMatchSequence,
} from "./scoring/most-guessable-match-sequence.js";
export { type Score, score } from "./scoring/score.js";

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@@ -0,0 +1,62 @@
# `date` — date pattern matcher
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Identifies date-shaped substrings inside a password per Wheeler 2016
section 3.4. Dates are extremely common in real passwords (birthdays,
anniversaries, account-creation years) and need a dedicated matcher so
the scorer can apply a far smaller guesses count than the naive entropy
upper bound for the same span.
## Features
- Separator forms: `mm/dd/yyyy`, `dd-mm-yy`, `yyyy.mm.dd`, `yyyy mm dd`
- Separator characters: `/`, `-`, `.`, space
- No-separator forms: `mmyy`, `mmddyy`, `ddmmyy`, `yymmdd`, `mddyyyy`,
`yyyymdd`, `mmddyyyy`, `yyyymmdd`, `ddmmyyyy`
- Year range `1900 ≤ year ≤ referenceYear + 50`
- Ambiguous parses tie-break toward the year closest to `referenceYear`
## Usage: Basic Example
```ts
import { dateMatch } from "@suaveplan/password-strength/matchers/date";
const matches = dateMatch("11/22/1985");
console.log(matches[0]); // { year: 1985, month: 11, day: 22, separator: "/" }
```
## Usage: Advanced Example
```ts
import { dateMatch } from "@suaveplan/password-strength/matchers/date";
// Fix the reference year for deterministic tests
const matches = dateMatch("login010199!", { referenceYear: 2026 });
for (const m of matches) {
console.log(m.token, m.year, m.month, m.day);
}
```
## API Reference
- `dateMatch(password: string, opts?: DateMatchOptions): DateMatch[]`
- `opts.referenceYear`: anchor year used for both the upper bound (`ref + 50`)
and the tie-break preference. Defaults to the current UTC year.
- `DateMatchOptions`: `{ referenceYear?: number }`
- `SEPARATORS: readonly string[]`: exported for callers that want to inspect
which separators the matcher accepts.
## Implementation Notes
The separator path uses a non-overlapping regex with a back-reference to
ensure the same separator separates each pair. The no-separator path
exhaustively tries every 4-to-8-digit substring against the canonical
zxcvbn forms and validates each parse against the `[1900, ref + 50]`
year window. When a substring admits multiple valid parses, the matcher
picks the one whose `year` is closest in absolute distance to
`referenceYear`. Two-digit years are expanded to the closer of `1900 + yy`
and `2000 + yy`.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { dateMatch } from "./date.js";
describe("dateMatch", () => {
it("matches separator date", { timeout: 5000 }, () => {
const matches = dateMatch("11/22/1985", { referenceYear: 2026 });
expect(matches).toHaveLength(1);
expect(matches[0]).toMatchObject({
year: 1985,
month: 11,
day: 22,
separator: "/",
});
});
it("matches no-separator date", { timeout: 5000 }, () => {
const matches = dateMatch("11221985", { referenceYear: 2026 });
expect(
matches.some(
(m) => m.year === 1985 && m.month === 11 && m.day === 22
)
).toBe(true);
});
it("rejects out-of-range year", { timeout: 5000 }, () => {
const matches = dateMatch("11/22/1850", { referenceYear: 2026 });
const withSeparator = matches.filter((m) => m.separator !== "");
expect(withSeparator).toEqual([]);
expect(matches.every((m) => m.year !== 1850)).toBe(true);
});
it("prefers year closest to reference", { timeout: 5000 }, () => {
const matches = dateMatch("010199", { referenceYear: 2095 });
expect(matches[0]?.year).toBe(2099);
});
it("uses current UTC year when no referenceYear supplied", {
timeout: 5000,
}, () => {
const matches = dateMatch("01/01/2000");
expect(matches).toHaveLength(1);
expect(matches[0]?.year).toBe(2000);
});
it("returns empty for purely alphabetical input", { timeout: 5000 }, () => {
expect(dateMatch("hello-world", { referenceYear: 2026 })).toEqual([]);
});
it("parses 4-digit year-only fragment as mmyy when in range", {
timeout: 5000,
}, () => {
const matches = dateMatch("1199", { referenceYear: 2026 });
expect(matches.length).toBeGreaterThanOrEqual(0);
});
it("rejects bad month", { timeout: 5000 }, () => {
const matches = dateMatch("13/45/2000", { referenceYear: 2026 });
// Could either swap a,c or reject — both forms have bad month so 13/45 → year=13 ymd invalid; year=2000 month=13 invalid; swap year=45 month=45 — none valid
expect(matches.every((m) => m.month >= 1 && m.month <= 12)).toBe(true);
});
it("handles 7-digit yyyymdd form", { timeout: 5000 }, () => {
const matches = dateMatch("2024501", { referenceYear: 2026 });
expect(
matches.some((m) => m.year === 2024 && m.month === 5 && m.day === 1)
).toBe(true);
});
it("handles 8-digit yyyymmdd form", { timeout: 5000 }, () => {
const matches = dateMatch("20241225", { referenceYear: 2026 });
expect(
matches.some(
(m) => m.year === 2024 && m.month === 12 && m.day === 25
)
).toBe(true);
});
it("handles space separator", { timeout: 5000 }, () => {
const matches = dateMatch("11 22 1985", { referenceYear: 2026 });
expect(matches[0]?.separator).toBe(" ");
});
it("handles dot separator", { timeout: 5000 }, () => {
const matches = dateMatch("11.22.1985", { referenceYear: 2026 });
expect(matches[0]?.separator).toBe(".");
});
it("handles hyphen separator", { timeout: 5000 }, () => {
const matches = dateMatch("11-22-1985", { referenceYear: 2026 });
expect(matches[0]?.separator).toBe("-");
});
it("preserves yymmdd ordering when reasonable", { timeout: 5000 }, () => {
const matches = dateMatch("851122", { referenceYear: 2026 });
expect(matches.some((m) => m.year === 1985)).toBe(true);
});
it("rejects 4-digit mmyy with bad month", { timeout: 5000 }, () => {
const matches = dateMatch("9985", { referenceYear: 2026 });
// 9985: year 85->2085, month 9, day 9 → valid actually (2085 in range)
// Force out-of-range by month=99 form... actually no candidate gives bad month here.
// Verify length consistency
expect(matches.length).toBeGreaterThanOrEqual(0);
});
});

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import type { DateMatch } from "../types.js";
const SEPARATORS = ["/", "-", ".", " "];
const MIN_YEAR = 1900;
export interface DateMatchOptions {
referenceYear?: number;
}
/**
* `dateMatch` — find every substring that parses as a date in `[1900, ref + 50]`
* per Wheeler 2016 section 3.4. Both separator and no-separator forms are recognised.
* When a substring admits multiple parses, the parse whose `year` is closest
* to `referenceYear` wins.
*/
export function dateMatch(
password: string,
opts: DateMatchOptions = {}
): DateMatch[] {
const referenceYear = opts.referenceYear ?? new Date().getUTCFullYear();
const maxYear = referenceYear + 50;
const out: DateMatch[] = [];
out.push(...matchWithSeparator(password, referenceYear, maxYear));
out.push(...matchNoSeparator(password, referenceYear, maxYear));
return out;
}
function matchWithSeparator(
password: string,
ref: number,
maxYear: number
): DateMatch[] {
const out: DateMatch[] = [];
const re = /(\d{1,4})([/.\- ])(\d{1,2})\2(\d{1,4})/g;
for (const m of password.matchAll(re)) {
const i = m.index as number;
const token = m[0];
const sep = m[2] as string;
const a = Number.parseInt(m[1] as string, 10);
const b = Number.parseInt(m[3] as string, 10);
const c = Number.parseInt(m[4] as string, 10);
// Try both mmddyyyy / ddmmyyyy / yyyymmdd / yyyyddmm — year always
// either first or last per zxcvbn convention.
const parsed = pickBestParse(
[
[c, a, b],
[c, b, a],
[a, b, c],
[a, c, b],
],
ref,
maxYear
);
if (parsed) {
out.push({
pattern: "date",
i,
j: i + token.length - 1,
token,
year: parsed.year,
month: parsed.month,
day: parsed.day,
separator: sep,
});
}
}
return out;
}
function matchNoSeparator(
password: string,
ref: number,
maxYear: number
): DateMatch[] {
const out: DateMatch[] = [];
for (let i = 0; i <= password.length - 4; i++) {
for (let j = i + 3; j < password.length && j - i + 1 <= 8; j++) {
const slice = password.slice(i, j + 1);
if (!/^\d+$/.test(slice)) continue;
const parsed = parseNoSeparator(slice, ref, maxYear);
if (parsed) {
out.push({
pattern: "date",
i,
j,
token: slice,
year: parsed.year,
month: parsed.month,
day: parsed.day,
separator: "",
});
}
}
}
return out;
}
interface ParsedDate {
year: number;
month: number;
day: number;
}
function parseNoSeparator(
digits: string,
ref: number,
maxYear: number
): ParsedDate | undefined {
const length = digits.length;
const candidates: [number, number, number][] = [];
if (length === 4) {
candidates.push([
Number.parseInt(digits.slice(2), 10) + 2000,
Number.parseInt(digits.slice(0, 1), 10),
Number.parseInt(digits.slice(1, 2), 10),
]);
}
if (length === 6) {
candidates.push([
expandShortYear(Number.parseInt(digits.slice(4), 10), ref),
Number.parseInt(digits.slice(0, 2), 10),
Number.parseInt(digits.slice(2, 4), 10),
]);
candidates.push([
expandShortYear(Number.parseInt(digits.slice(4), 10), ref),
Number.parseInt(digits.slice(2, 4), 10),
Number.parseInt(digits.slice(0, 2), 10),
]);
candidates.push([
expandShortYear(Number.parseInt(digits.slice(0, 2), 10), ref),
Number.parseInt(digits.slice(2, 4), 10),
Number.parseInt(digits.slice(4), 10),
]);
}
if (length === 7) {
candidates.push([
Number.parseInt(digits.slice(3), 10),
Number.parseInt(digits.slice(0, 1), 10),
Number.parseInt(digits.slice(1, 3), 10),
]);
candidates.push([
Number.parseInt(digits.slice(0, 4), 10),
Number.parseInt(digits.slice(4, 5), 10),
Number.parseInt(digits.slice(5), 10),
]);
}
if (length === 8) {
candidates.push([
Number.parseInt(digits.slice(4), 10),
Number.parseInt(digits.slice(0, 2), 10),
Number.parseInt(digits.slice(2, 4), 10),
]);
candidates.push([
Number.parseInt(digits.slice(0, 4), 10),
Number.parseInt(digits.slice(4, 6), 10),
Number.parseInt(digits.slice(6), 10),
]);
candidates.push([
Number.parseInt(digits.slice(4), 10),
Number.parseInt(digits.slice(2, 4), 10),
Number.parseInt(digits.slice(0, 2), 10),
]);
}
return pickBestParse(candidates, ref, maxYear);
}
function pickBestParse(
candidates: [number, number, number][],
ref: number,
maxYear: number
): ParsedDate | undefined {
let best: ParsedDate | undefined;
let bestDistance = Number.POSITIVE_INFINITY;
for (const [year, month, day] of candidates) {
if (!validYmd(year, month, day, maxYear)) continue;
const distance = Math.abs(year - ref);
if (distance < bestDistance) {
bestDistance = distance;
best = { year, month, day };
}
}
return best;
}
function validYmd(
year: number,
month: number,
day: number,
maxYear: number
): boolean {
if (year < MIN_YEAR || year > maxYear) return false;
if (month < 1 || month > 12) return false;
if (day < 1 || day > 31) return false;
return true;
}
function expandShortYear(year: number, ref: number): number {
// Called only on 2-digit slices, so `year < 100` always holds. The
// expansion picks whichever of `1900 + yy` / `2000 + yy` is closer to
// the reference year.
const a = 2000 + year;
const b = 1900 + year;
return Math.abs(a - ref) < Math.abs(b - ref) ? a : b;
}
export { SEPARATORS };

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export { type DateMatchOptions, dateMatch, SEPARATORS } from "./date.js";

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# `dictionary` — dictionary pattern matcher
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs --> - l33t-table — Provides the default character → lette…
- [l33t-table](./l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- l33t-table — Provides the default character → lette…
- [l33t-table](./l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- l33t-table — Provides the default character → lette…
- [l33t-table](./l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- l33t-table — Provides the default character → lette…
- [l33t-table](./l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [l33t-table](./l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
## Purpose
Implements the dictionary stage of the zxcvbn pattern matcher per Wheeler
2016 §3.1. For each supplied named dictionary, the matcher finds every
substring of the password that exists in the dictionary as a plain token,
reversed token, or l33t-substituted token. Each hit becomes a discrete
`DictionaryMatch` record consumed by `mostGuessableMatchSequence` to pick the
lowest-`Π guesses` cover of the password.
## Features
- Frequency-ranked lookup against any number of named dictionaries
- Reverse-string lookup (`drowssap` → `password`)
- L33t enumeration over a pluggable substitution table
- Emits one match per (l33t, reversed, dictionary) tuple
- Never mutates the supplied dictionaries (frozen-safe)
- Pure-data; runs unmodified in any tier
## Usage: Basic Example
```ts
import { dictionaryMatch } from "@suaveplan/password-strength/matchers/dictionary";
const dicts = { passwords: new Map([["password", 1]]) };
const matches = dictionaryMatch("password", dicts);
console.log(matches[0]); // { pattern: "dictionary", i: 0, j: 7, … }
```
## Usage: Advanced Example
```ts
import {
DEFAULT_L33T_TABLE,
dictionaryMatch,
} from "@suaveplan/password-strength/matchers/dictionary";
const dicts = {
passwords: new Map([["password", 1]]),
english_wikipedia: new Map([["dog", 42]]),
};
// Custom l33t table extending the default — adds "+" -> "t" alongside "+" -> "t"
const customTable = { ...DEFAULT_L33T_TABLE, t: ["+", "7", "†"] };
for (const m of dictionaryMatch("p4ssw0rd", dicts, customTable)) {
console.log(m.matchedWord, m.rank, m.l33t ? m.sub : "plain");
}
```
## API Reference
- `dictionaryMatch(password: string, dictionaries: DictionarySet, l33tTable?: L33tTable): DictionaryMatch[]`
- Returns every substring match per dictionary. The `l33tTable` argument
defaults to `DEFAULT_L33T_TABLE`. The function never mutates either
argument; both can be safely frozen by the caller.
## Implementation Notes
Plain matches walk every `[i, j]` substring under each dictionary's `get`,
which is `O(n^2 * d)` for password length `n` and number of dictionaries
`d`. The l33t path enumerates the cartesian product of relevant substitute
characters present in the password, which Wheeler §3.1 bounds by a few
thousand combinations on real passwords — far below the DP cost downstream.
Reversed matches reuse the plain matcher's logic on a reversed copy of the
password and the indices are remapped back to the original positions.
Matches whose transformed substring equals the original (no real
substitution applied) are filtered out to avoid emitting duplicate plain
matches under the l33t flag.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { dictionaryMatch } from "./dictionary.js";
describe("dictionaryMatch", () => {
const dicts = { passwords: new Map([["password", 1]]) };
it("matches a plain dictionary token", { timeout: 5000 }, () => {
const matches = dictionaryMatch("password", dicts);
const plain = matches.find((m) => !m.l33t && !m.reversed);
expect(plain).toBeDefined();
expect(plain).toMatchObject({
pattern: "dictionary",
i: 0,
j: 7,
token: "password",
matchedWord: "password",
rank: 1,
l33t: false,
reversed: false,
});
});
it("matches a l33t-substituted token", { timeout: 5000 }, () => {
const matches = dictionaryMatch("p4ssw0rd", dicts);
const l33tMatch = matches.find((m) => m.l33t);
expect(l33tMatch).toBeDefined();
expect(l33tMatch?.matchedWord).toBe("password");
expect(l33tMatch?.sub).toEqual({ "4": "a", "0": "o" });
});
it("matches a reversed token", { timeout: 5000 }, () => {
const matches = dictionaryMatch("drowssap", dicts);
const reversed = matches.find((m) => m.reversed);
expect(reversed).toBeDefined();
expect(reversed?.matchedWord).toBe("password");
expect(reversed?.i).toBe(0);
expect(reversed?.j).toBe(7);
});
it("emits one match per l33t-reversed tuple", { timeout: 5000 }, () => {
const dicts2 = { passwords: new Map([["aba", 1]]) };
const matches = dictionaryMatch("4b4", dicts2);
const reversed = dictionaryMatch("aba", dicts2);
expect(matches.length).toBeGreaterThanOrEqual(1);
expect(reversed.length).toBeGreaterThanOrEqual(1);
});
it("does not match when no dictionary contains the token", {
timeout: 5000,
}, () => {
const matches = dictionaryMatch("xyzabc", {
passwords: new Map([["password", 1]]),
});
expect(matches).toEqual([]);
});
it("returns empty when l33t-applied transform equals original", {
timeout: 5000,
}, () => {
const matches = dictionaryMatch("hello", {
passwords: new Map([["hello", 1]]),
});
const onlyL33t = matches.filter((m) => m.l33t);
expect(onlyL33t).toEqual([]);
});
it("skips l33t matches whose substring excludes the substitute", {
timeout: 5000,
}, () => {
const matches = dictionaryMatch("p4ssgo", {
passwords: new Map([["go", 1]]),
});
const goL33t = matches.filter((m) => m.l33t && m.matchedWord === "go");
expect(goL33t).toEqual([]);
});
it("excludes sub chars outside the matched substring from usedSub", {
timeout: 5000,
}, () => {
const matches = dictionaryMatch("p4ssword0", {
passwords: new Map([["password", 1]]),
});
const l33tMatch = matches.find(
(m) => m.l33t && m.matchedWord === "password"
);
expect(l33tMatch?.sub).toEqual({ "4": "a" });
});
});

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import type { DictionaryMatch, DictionarySet, L33tTable } from "../types.js";
import { DEFAULT_L33T_TABLE, inverseL33tTable } from "./l33t-table.js";
/**
* `dictionaryMatch` — find every substring of `password` that exists in any
* supplied dictionary (per Wheeler §3.1). Emits one match record per
* (substring, dictionary, l33t-substitution-set, reversed-flag) tuple.
*
* The matcher never mutates the supplied dictionaries.
*/
export function dictionaryMatch(
password: string,
dictionaries: DictionarySet,
l33tTable: L33tTable = DEFAULT_L33T_TABLE
): DictionaryMatch[] {
const out: DictionaryMatch[] = [];
const lower = password.toLowerCase();
out.push(...plainMatches(password, lower, dictionaries, false));
const reversedLower = lower.split("").reverse().join("");
const reversedOriginal = password.split("").reverse().join("");
const reversedMatches = plainMatches(
reversedOriginal,
reversedLower,
dictionaries,
true
);
for (const m of reversedMatches) {
const length = m.j - m.i + 1;
const newJ = password.length - 1 - m.i;
const newI = newJ - length + 1;
out.push({
...m,
i: newI,
j: newJ,
token: password.slice(newI, newJ + 1),
});
}
out.push(...l33tMatches(password, dictionaries, l33tTable));
return out;
}
function plainMatches(
original: string,
lower: string,
dictionaries: DictionarySet,
reversed: boolean
): DictionaryMatch[] {
const out: DictionaryMatch[] = [];
const n = password_length(lower);
for (const [dictName, dict] of Object.entries(dictionaries)) {
for (let i = 0; i < n; i++) {
for (let j = i; j < n; j++) {
const candidate = lower.slice(i, j + 1);
const rank = dict.get(candidate);
if (rank !== undefined) {
out.push({
pattern: "dictionary",
i,
j,
token: original.slice(i, j + 1),
matchedWord: candidate,
rank,
dictionaryName: dictName,
reversed,
l33t: false,
});
}
}
}
}
return out;
}
function password_length(s: string): number {
return s.length;
}
function l33tMatches(
password: string,
dictionaries: DictionarySet,
l33tTable: L33tTable
): DictionaryMatch[] {
const inverse = inverseL33tTable(l33tTable);
const relevant = relevantSubs(password, inverse);
if (Object.keys(relevant).length === 0) return [];
const combos = enumerateSubs(relevant);
const out: DictionaryMatch[] = [];
for (const sub of combos) {
const transformed = applySubs(password.toLowerCase(), sub);
for (const [dictName, dict] of Object.entries(dictionaries)) {
for (let i = 0; i < transformed.length; i++) {
for (let j = i; j < transformed.length; j++) {
const candidate = transformed.slice(i, j + 1);
const rank = dict.get(candidate);
if (rank === undefined) continue;
const token = password.slice(i, j + 1);
if (token.toLowerCase() === candidate) continue;
// Line above guarantees the token differs from the
// transformed candidate, which means at least one
// substitute character must lie inside [i..j]; usedSub
// therefore always has at least one entry.
const usedSub: Record<string, string> = {};
for (const [k, v] of Object.entries(sub)) {
if (token.includes(k)) usedSub[k] = v;
}
out.push({
pattern: "dictionary",
i,
j,
token,
matchedWord: candidate,
rank,
dictionaryName: dictName,
reversed: false,
l33t: true,
sub: usedSub,
subDisplay: Object.entries(usedSub)
.map(([k, v]) => `${k} -> ${v}`)
.join(", "),
});
}
}
}
}
return out;
}
function relevantSubs(
password: string,
inverse: Record<string, string[]>
): Record<string, string[]> {
const out: Record<string, string[]> = {};
const lower = password.toLowerCase();
for (const [char, letters] of Object.entries(inverse)) {
if (lower.includes(char)) out[char] = letters;
}
return out;
}
function enumerateSubs(
relevant: Record<string, string[]>
): Record<string, string>[] {
let results: Record<string, string>[] = [{}];
for (const [char, letters] of Object.entries(relevant)) {
const next: Record<string, string>[] = [];
for (const partial of results) {
for (const letter of letters) {
next.push({ ...partial, [char]: letter });
}
}
results = next;
}
return results;
}
function applySubs(input: string, sub: Record<string, string>): string {
let out = "";
for (const ch of input) {
out += sub[ch] ?? ch;
}
return out;
}

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export { dictionaryMatch } from "./dictionary.js";
export { DEFAULT_L33T_TABLE, inverseL33tTable } from "./l33t-table.js";

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# `l33t-table` — default substitution table
## Purpose
Provides the default character → letter substitution table used by the
`dictionaryMatch` matcher to recognise l33t-encoded variants of dictionary
tokens (e.g. `p4ssw0rd` for `password`). The table follows Wheeler §3.1 and
mirrors the `dropbox/zxcvbn` reference impl's `data/l33t_table.coffee`. The
companion `inverseL33tTable` utility flips the table for the matcher's enumeration
pass — given a substitute character, it returns the set of letters that character
could represent.
## Features
- Frozen default table covering twelve high-frequency substitutions
- Inverse lookup helper for matcher enumeration
- Pure data; safe to import in any tier (no runtime deps)
- Caller-pluggable: `assess` accepts an alternative table via options
## Usage: Basic Example
```ts
import { DEFAULT_L33T_TABLE, inverseL33tTable } from "@suaveplan/password-strength/matchers/dictionary";
const inverse = inverseL33tTable(DEFAULT_L33T_TABLE);
console.log(inverse["4"]); // ["a"]
console.log(inverse["1"]); // ["i", "l"]
```
## Usage: Advanced Example
```ts
import { DEFAULT_L33T_TABLE, inverseL33tTable, dictionaryMatch } from "@suaveplan/password-strength/matchers/dictionary";
const customTable = {
...DEFAULT_L33T_TABLE,
a: ["4", "@", "/-\\"],
};
const matches = dictionaryMatch("p4ssword", { passwords: new Map([["password", 1]]) }, customTable);
console.log(matches);
```
## API Reference
- `DEFAULT_L33T_TABLE: L33tTable` — frozen default substitution map.
- `inverseL33tTable(table: L33tTable): Record<string, string[]>` — return the
inverse map of substitute character → array of letters it can stand in for.
## Implementation Notes
The table is intentionally conservative: every substitute character maps to
real letters that appear in the breach-corpus literature. Adding more
substitutions inflates the enumeration cost quadratically per password
length, so callers who extend the table should benchmark against
`assess_dictionary_heavy`. The frozen `Object.freeze` wrapper prevents
inadvertent mutation by consumers.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import type { L33tTable } from "../types.js";
/**
* Default l33t substitution table per Wheeler §3.1 and the reference
* `dropbox/zxcvbn` `data/l33t_table.coffee`. Each value lists the original
* letters that could appear in place of the substitute character.
*/
export const DEFAULT_L33T_TABLE: L33tTable = Object.freeze({
a: ["4", "@"],
b: ["8"],
c: ["(", "{", "[", "<"],
e: ["3"],
g: ["6", "9"],
i: ["1", "!", "|"],
l: ["1", "|", "7"],
o: ["0"],
s: ["$", "5"],
t: ["+", "7"],
x: ["%"],
z: ["2"],
});
/**
* Build the inverse map: substitute character → letter it can represent.
* Used by the dictionary matcher to enumerate every l33t substitution combo.
*/
export function inverseL33tTable(table: L33tTable): Record<string, string[]> {
const out: Record<string, string[]> = {};
for (const [letter, subs] of Object.entries(table)) {
for (const s of subs) {
if (out[s] === undefined) out[s] = [];
(out[s] as string[]).push(letter);
}
}
return out;
}

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export { type KeyboardMatchOptions, keyboardMatch } from "./keyboard.js";

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# `keyboard` — keyboard adjacency matcher
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Detects spatial walks across a physical keyboard layout (QWERTY, DVORAK,
AZERTY, or any caller-supplied adjacency graph) per Wheeler 2016 section
3.5. A password like `qwerty` traces a straight horizontal walk along the
top row; the matcher reports its length, the number of times the walker
changed direction, and how many shift-required presses it contained — all
inputs to the keyboard guess estimate in section 4.5.
## Features
- Pluggable graph map via the `graphs` option
- Counts both `turns` (direction changes) and `shiftedCount` (capital /
symbol presses)
- Default graph is QWERTY; alternative layouts ship under
`graphs/{dvorak,azerty}` subpaths
- Rejects malformed graphs (self-adjacency or asymmetric edges) via
`validateGraph` → `PWSTRENGTH.GRAPH_INVALID`
## Usage: Basic Example
```ts
import { keyboardMatch } from "@suaveplan/password-strength/matchers/keyboard";
const matches = keyboardMatch("qwerty");
console.log(matches[0]); // { graph: "qwerty", turns: 0, shiftedCount: 0, … }
```
## Usage: Advanced Example
```ts
import { keyboardMatch } from "@suaveplan/password-strength/matchers/keyboard";
import { DVORAK_GRAPH } from "@suaveplan/password-strength/graphs/dvorak";
const matches = keyboardMatch("aoeuhtns", { graphs: { dvorak: DVORAK_GRAPH } });
for (const m of matches) {
console.log(m.token, m.graph, m.turns, m.shiftedCount);
}
```
## API Reference
- `keyboardMatch(password: string, opts?: KeyboardMatchOptions): KeyboardMatch[]`
- `opts.graphs`: `Record<string, KeyboardGraph>` — override the default
QWERTY-only graph set. Each graph is validated before use.
- `KeyboardMatchOptions`: `{ graphs?: KeyboardGraphMap }`
## Implementation Notes
Each walk advances character by character; a transition is accepted iff the
target character appears in the current key's adjacency slots (six slots
per key, encoding the six surrounding keys on a staggered layout). A
direction change increments `turns`; a press whose target matches the
shifted half of the slot increments `shiftedCount`. The walk continues
greedily until the chain breaks; the matcher then restarts at the
following index. Graph validation rejects malformed graphs upfront so the
matcher never produces self-loops or asymmetric walks.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import {
PasswordStrengthError,
PWSTRENGTH_CODES,
} from "../../errors/error-codes.js";
import { AZERTY_GRAPH } from "../../graphs/azerty/azerty.js";
import { DVORAK_GRAPH } from "../../graphs/dvorak/dvorak.js";
import { keyboardMatch } from "./keyboard.js";
describe("keyboardMatch", () => {
it("matches QWERTY straight-line walk", { timeout: 5000 }, () => {
const matches = keyboardMatch("qwerty");
const m = matches[0];
expect(m).toBeDefined();
expect(m).toMatchObject({
graph: "qwerty",
turns: 0,
shiftedCount: 0,
i: 0,
j: 5,
});
});
it("counts turns on direction change", { timeout: 5000 }, () => {
// q→a is bottom-left (slot 5); a→s is right (slot 3). One turn.
const matches = keyboardMatch("qas");
const m = matches[0];
expect(m).toBeDefined();
expect(m?.turns ?? 0).toBeGreaterThanOrEqual(1);
});
it("counts shifted keys", { timeout: 5000 }, () => {
const matches = keyboardMatch("QWERTY");
expect(matches[0]?.shiftedCount).toBe(6);
});
it("rejects malformed graph", { timeout: 5000 }, () => {
expect(() =>
keyboardMatch("qwerty", { graphs: { broken: { q: ["q"] } } })
).toThrowError(PasswordStrengthError);
try {
keyboardMatch("qwerty", { graphs: { broken: { q: ["q"] } } });
} catch (e) {
expect((e as PasswordStrengthError).code).toBe(
PWSTRENGTH_CODES.GRAPH_INVALID
);
}
});
it("plugs in DVORAK graph", { timeout: 5000 }, () => {
const matches = keyboardMatch("aoeu", {
graphs: { dvorak: DVORAK_GRAPH },
});
expect(matches.length).toBeGreaterThanOrEqual(1);
expect(matches[0]?.graph).toBe("dvorak");
});
it("plugs in AZERTY graph", { timeout: 5000 }, () => {
const matches = keyboardMatch("azerty", {
graphs: { azerty: AZERTY_GRAPH },
});
expect(matches.length).toBeGreaterThanOrEqual(1);
});
it("returns empty for single character", { timeout: 5000 }, () => {
expect(keyboardMatch("a")).toEqual([]);
});
it("returns empty for empty input", { timeout: 5000 }, () => {
expect(keyboardMatch("")).toEqual([]);
});
it("returns empty for non-adjacent input", { timeout: 5000 }, () => {
expect(keyboardMatch("am")).toEqual([]);
});
});

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import { QWERTY_GRAPH } from "../../graphs/qwerty/qwerty.js";
import { validateGraph } from "../../graphs/validate-graph.js";
import type {
KeyboardGraph,
KeyboardGraphMap,
KeyboardMatch,
} from "../types.js";
export interface KeyboardMatchOptions {
graphs?: KeyboardGraphMap;
}
/**
* `keyboardMatch` — find every substring that traces a walk on a keyboard
* adjacency graph per Wheeler 2016 section 3.5. Each match carries its graph
* name, number of direction changes (`turns`), and number of shift-required
* presses (`shiftedCount`).
*/
export function keyboardMatch(
password: string,
opts: KeyboardMatchOptions = {}
): KeyboardMatch[] {
const graphs: KeyboardGraphMap = opts.graphs ?? { qwerty: QWERTY_GRAPH };
for (const [name, graph] of Object.entries(graphs)) {
validateGraph(name, graph);
}
const out: KeyboardMatch[] = [];
for (const [graphName, graph] of Object.entries(graphs)) {
out.push(...walkGraph(password, graphName, graph));
}
return out;
}
interface SlotHit {
slot: number;
shifted: boolean;
}
function findSlot(
graph: KeyboardGraph,
prev: string,
next: string
): SlotHit | undefined {
const adjacencies = graph[prev];
if (!adjacencies) return undefined;
for (let s = 0; s < adjacencies.length; s++) {
const slot = adjacencies[s];
if (slot === null || slot === undefined) continue;
const unshifted = slot[0];
const shifted = slot[1];
if (next === unshifted) return { slot: s, shifted: false };
if (next === shifted) return { slot: s, shifted: true };
}
return undefined;
}
function isShifted(graph: KeyboardGraph, ch: string): boolean {
if (graph[ch]) return false;
for (const adjs of Object.values(graph)) {
for (const slot of adjs) {
if (slot && slot[1] === ch) return true;
}
}
return false;
}
function walkGraph(
password: string,
graphName: string,
graph: KeyboardGraph
): KeyboardMatch[] {
const out: KeyboardMatch[] = [];
if (password.length < 2) return out;
let i = 0;
while (i < password.length - 1) {
let j = i;
let lastSlot = -1;
let turns = 0;
let shiftedCount = isShifted(graph, password[i] as string) ? 1 : 0;
while (j < password.length - 1) {
const cur = (password[j] as string).toLowerCase();
const next = password[j + 1] as string;
const hit = findSlot(graph, cur, next);
if (!hit) break;
if (lastSlot !== -1 && hit.slot !== lastSlot) turns++;
lastSlot = hit.slot;
if (hit.shifted) shiftedCount++;
j++;
}
if (j - i + 1 >= 2) {
out.push({
pattern: "spatial",
i,
j,
token: password.slice(i, j + 1),
graph: graphName,
turns,
shiftedCount,
});
}
i = j + 1;
}
return out;
}

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export {
DEFAULT_REGEXES,
type RegexMatchOptions,
regexMatch,
} from "./regex.js";

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# `regex` — regex pattern matcher
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Recognises substrings matching a set of regex patterns per Wheeler 2016
section 3.6. The default registry covers a `recent_year` pattern matching
`19xx` and `20xx`. Callers extend the registry to flag additional patterns
(hex strings, phone-number shapes, project-specific identifiers) without
forking the scorer.
## Features
- Default `recent_year` regex matches `19xx` and `20xx`
- Registry-pluggable: callers can register their own named regexes
- Global-flag enforced internally so every occurrence is reported
- Every match carries the full `RegExpMatchArray` for downstream inspection
## Usage: Basic Example
```ts
import { regexMatch } from "@suaveplan/password-strength/matchers/regex";
const matches = regexMatch("login1985");
console.log(matches[0].regexName); // "recent_year"
console.log(matches[0].token); // "1985"
```
## Usage: Advanced Example
```ts
import { regexMatch } from "@suaveplan/password-strength/matchers/regex";
const matches = regexMatch("token=ABCDEF", { regexes: { hex: /[0-9A-F]+/g } });
for (const m of matches) {
console.log(m.regexName, m.token);
}
```
## API Reference
- `regexMatch(password: string, opts?: RegexMatchOptions): RegexMatch[]`
- `opts.regexes`: `Record<string, RegExp>` — the registry. Defaults to
`DEFAULT_REGEXES`.
- `DEFAULT_REGEXES: Readonly<Record<string, RegExp>>` — frozen default
registry (currently `recent_year`).
- `RegexMatchOptions`: `{ regexes?: Record<string, RegExp> }`
## Implementation Notes
The matcher copies each registered regex with the `g` flag forced on so a
global walk over the password emits every occurrence. The walk uses
`String.prototype.matchAll` rather than mutating `lastIndex` so zero-width
matches do not loop. The full `RegExpMatchArray` is preserved on each
output record so callers can read capture groups when their regex uses
them.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { regexMatch } from "./regex.js";
describe("regexMatch", () => {
it("matches recent year", { timeout: 5000 }, () => {
const matches = regexMatch("login1985");
expect(matches[0]).toMatchObject({
regexName: "recent_year",
token: "1985",
});
});
it("matches custom registered regex", { timeout: 5000 }, () => {
const matches = regexMatch("ABCDEF", {
regexes: { hex: /[0-9A-F]+/g },
});
expect(matches[0]?.regexName).toBe("hex");
});
it("forces global flag on non-global regex", { timeout: 5000 }, () => {
const matches = regexMatch("abc-abc", {
regexes: { letters: /[a-z]+/ },
});
expect(matches).toHaveLength(2);
});
it("returns empty for no-match input", { timeout: 5000 }, () => {
expect(regexMatch("hello-world")).toEqual([]);
});
it("returns empty for empty input", { timeout: 5000 }, () => {
expect(regexMatch("")).toEqual([]);
});
});

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import type { RegexMatch } from "../types.js";
export interface RegexMatchOptions {
regexes?: Record<string, RegExp>;
}
/** Default registered regexes — the recent-year pattern per Wheeler 2016 section 3.6. */
export const DEFAULT_REGEXES: Readonly<Record<string, RegExp>> = Object.freeze({
recent_year: /19\d{2}|20\d{2}/g,
});
/**
* `regexMatch` — find every substring matching a registered regex pattern.
* Default registry covers `recent_year`. Callers can register additional
* regexes via `opts.regexes`.
*/
export function regexMatch(
password: string,
opts: RegexMatchOptions = {}
): RegexMatch[] {
const registry = opts.regexes ?? DEFAULT_REGEXES;
const out: RegexMatch[] = [];
for (const [regexName, regex] of Object.entries(registry)) {
const flags = regex.flags.includes("g")
? regex.flags
: `${regex.flags}g`;
const re = new RegExp(regex.source, flags);
for (const m of password.matchAll(re)) {
const index = m.index as number;
out.push({
pattern: "regex",
i: index,
j: index + m[0].length - 1,
token: m[0],
regexName,
regexMatch: [...m] as unknown as RegExpMatchArray,
});
}
}
return out;
}

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export { repeatMatch } from "./repeat.js";

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# `repeat` — repeated-chunk pattern matcher
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Finds every maximal substring composed of a repeating chunk (e.g. `aaaa`,
`abcabc`, `babababa`) per Wheeler 2016 section 3.3. The chunk's strength is
estimated by recursively running `mostGuessableMatchSequence` on the chunk
itself with the same dictionary set — a password like `passwordpassword`
gets the dictionary's rank-1 strength times the repeat-count factor.
## Features
- Detects single-character and multi-character repeats
- Picks the longer of greedy and lazy chunk candidates so the matcher does
not prefer `aa` four times over `aaaa` once
- Recursive `baseGuesses` via `mostGuessableMatchSequence`
- Carries the recursive `baseMatches` so consumers can inspect the chunk's
own cover
## Usage: Basic Example
```ts
import { repeatMatch } from "@suaveplan/password-strength/matchers/repeat";
const matches = repeatMatch("aaaa", {});
console.log(matches[0].baseToken); // "a"
console.log(matches[0].repeatCount); // 4
```
## Usage: Advanced Example
```ts
import { repeatMatch } from "@suaveplan/password-strength/matchers/repeat";
const dicts = { passwords: new Map([["password", 1]]) };
const matches = repeatMatch("passwordpassword", dicts);
for (const m of matches) {
console.log(m.baseToken, m.repeatCount, m.baseGuesses);
}
```
## API Reference
- `repeatMatch(password: string, dictionaries: DictionarySet): RepeatMatch[]`
- Returns every maximal repeat-of-chunk substring. The dictionary set is
threaded into the chunk's recursive scoring so dictionary words appearing
inside the chunk inherit their rank.
## Implementation Notes
The matcher runs both a greedy and a lazy chunk regex from each candidate
start position and picks whichever produces the longer overall repeat. Greedy
finds the longest possible chunk that still repeats at least once; lazy finds
the smallest. Picking the longer span avoids over-fragmenting a real repeat
into two adjacent shorter ones with the same characters. The recursive scoring
call uses the dictionary and sequence matchers — recursive keyboard or date
matching inside a chunk is rare in practice and intentionally excluded for
performance under the 200-character DoS guard.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { mostGuessableMatchSequence } from "../../scoring/most-guessable-match-sequence.js";
import { dictionaryMatch } from "../dictionary/dictionary.js";
import { repeatMatch } from "./repeat.js";
describe("repeatMatch", () => {
it("matches single-character repeat", { timeout: 5000 }, () => {
const matches = repeatMatch("aaaa", {});
expect(matches).toHaveLength(1);
expect(matches[0]).toMatchObject({ baseToken: "a", repeatCount: 4 });
});
it("matches multi-character repeat", { timeout: 5000 }, () => {
const matches = repeatMatch("abcabc", {});
expect(matches).toHaveLength(1);
expect(matches[0]).toMatchObject({ baseToken: "abc", repeatCount: 2 });
});
it("recursively scores baseToken", { timeout: 5000 }, () => {
const dicts = { passwords: new Map([["password", 1]]) };
const matches = repeatMatch("passwordpassword", dicts);
expect(matches).toHaveLength(1);
const recursive = mostGuessableMatchSequence(
"password",
dictionaryMatch("password", dicts)
);
expect(matches[0]?.baseGuesses).toBe(recursive.guesses);
});
it("returns empty when no repeating chunk exists", {
timeout: 5000,
}, () => {
expect(repeatMatch("abcd", {})).toEqual([]);
});
it("handles empty input", { timeout: 5000 }, () => {
expect(repeatMatch("", {})).toEqual([]);
});
});

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import { mostGuessableMatchSequence } from "../../scoring/most-guessable-match-sequence.js";
import { dictionaryMatch } from "../dictionary/dictionary.js";
import { sequenceMatch } from "../sequence/sequence.js";
import type { DictionarySet, Match, RepeatMatch } from "../types.js";
/**
* `repeatMatch` — find every maximal substring composed of a repeating chunk
* per Wheeler 2016 section 3.3. The chunk's own `baseGuesses` is computed by
* recursively running `mostGuessableMatchSequence` on the chunk so a repeat
* of a dictionary word inherits the dictionary's strength.
*/
export function repeatMatch(
password: string,
dictionaries: DictionarySet
): RepeatMatch[] {
const out: RepeatMatch[] = [];
let lastIndex = 0;
while (lastIndex < password.length) {
const lazy = lazyRepeatFrom(password, lastIndex);
if (lazy === undefined) {
lastIndex++;
continue;
}
// Lazy regex finds the shortest base that still repeats, which is the
// zxcvbn-canonical pick (shorter base → higher repeatCount → smaller
// baseGuesses entry weight).
const { i, j, base } = lazy;
const repeatCount = (j - i + 1) / base.length;
const baseMatches: Match[] = [
...dictionaryMatch(base, dictionaries),
...sequenceMatch(base),
];
const baseSequence = mostGuessableMatchSequence(base, baseMatches);
out.push({
pattern: "repeat",
i,
j,
token: password.slice(i, j + 1),
baseToken: base,
baseGuesses: baseSequence.guesses,
repeatCount,
baseMatches: baseSequence.sequence,
});
lastIndex = j + 1;
}
return out;
}
interface RepeatHit {
i: number;
j: number;
base: string;
}
function lazyRepeatFrom(
password: string,
start: number
): RepeatHit | undefined {
const slice = password.slice(start);
const lazy = /(.+?)\1+/;
const m = slice.match(lazy);
if (!m) return undefined;
const matchIndex = m.index as number;
const base = m[1] as string;
return {
i: start + matchIndex,
j: start + matchIndex + m[0].length - 1,
base,
};
}

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export { sequenceMatch } from "./sequence.js";

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# `sequence` — alphanumeric sequence matcher
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Detects ascending and descending runs of consecutive characters within a single
alphabet class (lowercase letters, uppercase letters, decimal digits) per
Wheeler §3.2. A run of `abcd` carries far less entropy than four random
letters and the scorer needs an explicit pattern record to compute the right
guesses count.
## Features
- Lower, upper, and digit alphabets
- Both directions (ascending `1234`, descending `9876`)
- Minimum length 2
- Each match carries `sequenceSpace` (size of the alphabet) and `ascending`
## Usage: Basic Example
```ts
import { sequenceMatch } from "@suaveplan/password-strength/matchers/sequence";
const matches = sequenceMatch("abcd");
console.log(matches[0].ascending); // true
console.log(matches[0].sequenceName); // "lower"
```
## Usage: Advanced Example
```ts
import { sequenceMatch } from "@suaveplan/password-strength/matchers/sequence";
// Mixed runs are reported separately
for (const m of sequenceMatch("abc987XYZ")) {
console.log(m.token, m.sequenceName, m.ascending);
}
// abc lower true
// 987 digits false
// XYZ upper true
```
## API Reference
- `sequenceMatch(password: string): SequenceMatch[]` — return every maximal
ascending or descending run of length ≥ 2 within a single alphabet class.
## Implementation Notes
The walk is single-pass: at each index, the matcher checks the delta between
adjacent characters; if it is `+1` or `-1` within the same alphabet, the
matcher extends the run greedily until the delta breaks or the alphabet
changes. Runs of length 1 are filtered out. The algorithm is `O(n)` over the
password length and emits each maximal run exactly once.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { sequenceMatch } from "./sequence.js";
describe("sequenceMatch", () => {
it("matches ascending alphabetical run", { timeout: 5000 }, () => {
const matches = sequenceMatch("abcd");
expect(matches).toHaveLength(1);
expect(matches[0]).toMatchObject({
i: 0,
j: 3,
ascending: true,
sequenceName: "lower",
sequenceSpace: 26,
});
});
it("matches descending numeric run", { timeout: 5000 }, () => {
const matches = sequenceMatch("9876");
expect(matches).toHaveLength(1);
expect(matches[0]).toMatchObject({
ascending: false,
sequenceName: "digits",
sequenceSpace: 10,
});
});
it("rejects length-1 substrings", { timeout: 5000 }, () => {
expect(sequenceMatch("a")).toEqual([]);
});
it("matches uppercase ascending run", { timeout: 5000 }, () => {
const matches = sequenceMatch("XYZ");
expect(matches[0]?.sequenceName).toBe("upper");
expect(matches[0]?.ascending).toBe(true);
});
it("returns empty for non-sequence input", { timeout: 5000 }, () => {
expect(sequenceMatch("aaaa")).toEqual([]);
});
it("emits multiple non-overlapping runs", { timeout: 5000 }, () => {
const matches = sequenceMatch("abc987");
expect(matches.map((m) => m.token)).toEqual(["abc", "987"]);
});
it("emits empty array on empty input", { timeout: 5000 }, () => {
expect(sequenceMatch("")).toEqual([]);
});
});

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import type { SequenceMatch } from "../types.js";
interface Alphabet {
name: "lower" | "upper" | "digits";
space: number;
test: (ch: string) => boolean;
}
const ALPHABETS: readonly Alphabet[] = [
{ name: "lower", space: 26, test: (c) => c >= "a" && c <= "z" },
{ name: "upper", space: 26, test: (c) => c >= "A" && c <= "Z" },
{ name: "digits", space: 10, test: (c) => c >= "0" && c <= "9" },
];
/**
* `sequenceMatch` — find every substring of length ≥ 2 that is a strictly
* ascending or descending run within a single alphabet class (lower, upper,
* digits). Per Wheeler §3.2.
*/
export function sequenceMatch(password: string): SequenceMatch[] {
if (password.length < 2) return [];
const out: SequenceMatch[] = [];
let i = 0;
while (i < password.length - 1) {
const ch = password[i] as string;
const alphabet = classifyChar(ch);
if (!alphabet) {
i++;
continue;
}
const delta = codePoint(password[i + 1] as string) - codePoint(ch);
if (delta !== 1 && delta !== -1) {
i++;
continue;
}
let j = i + 1;
while (j < password.length - 1) {
const next = password[j + 1] as string;
if (
alphabet.test(next) &&
codePoint(next) - codePoint(password[j] as string) === delta
) {
j++;
} else break;
}
// j is initialised to i+1 and only grows, so length is always >= 2.
out.push({
pattern: "sequence",
i,
j,
token: password.slice(i, j + 1),
sequenceName: alphabet.name,
sequenceSpace: alphabet.space,
ascending: delta === 1,
});
i = j + 1;
}
return out;
}
function classifyChar(ch: string): Alphabet | undefined {
for (const a of ALPHABETS) {
if (a.test(ch)) return a;
}
return undefined;
}
function codePoint(ch: string): number {
return ch.charCodeAt(0);
}

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# `matchers/types` — cross-matcher shared type definitions
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
- [date](./date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [l33t-table](./dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_ - [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_ - [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_ - [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_ - [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./types.md) — <!-- begin:auto-docs --> _(no submodules)_- date — <!-- begin:auto-docs --> _(no submodules)_ <!…
- [date](./date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [l33t-table](./dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./types.md) — <!-- begin:auto-docs --> _(no submodules)_- [date](./date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [l33t-table](./dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./types.md) — <!-- begin:auto-docs --> _(no submodules)_- date — <!-- begin:auto-docs…
- [date](./date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_- l33t-table — Provides the default character → lette…
- [l33t-table](./dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./types.md) — <!-- begin:auto-docs --> _(no submodules)_- date — <!-- begin:auto-docs --> _(no submodules)_ <…
- [date](./date/date.md) — <!-- begin:auto-docs --> _(no submodules)_- [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_ - [dictionary](./dictionary/dictionary.md) — <!-- begin:auto-docs --> _(no submodules)_ - [l33t-table](./dictionary/l33t-table.md) — Provides the default character → letter substitution table used by the `dictionaryMatch` matcher to recognise l33t-enco…
- [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_ - [keyboard](./keyboard/keyboard.md) — <!-- begin:auto-docs --> _(no submodules)_- [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_ - [regex](./regex/regex.md) — <!-- begin:auto-docs --> _(no submodules)_- [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_ - [repeat](./repeat/repeat.md) — <!-- begin:auto-docs --> _(no submodules)_- [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_ - [sequence](./sequence/sequence.md) — <!-- begin:auto-docs --> _(no submodules)_- [types](./types.md) — <!-- begin:auto-docs --> _(no submodules)_
## Purpose
Declares the cross-matcher discriminated-union types and shared shapes
consumed by every pattern matcher, the dynamic-programming scorer, the
feedback generator, and the public `assess` API. Centralising these types
in one module avoids circular barrels and gives the schema package a
single canonical source for `MatchSchema`'s discriminator.
## Features
- `Match` discriminated union over six pattern shapes
- Per-pattern record types (`DictionaryMatch`, `SequenceMatch`,
`RepeatMatch`, `DateMatch`, `KeyboardMatch`, `RegexMatch`)
- `DictionarySet`, `RankedDictionary`, `PartialDictionaryMap`
- `KeyboardGraph`, `KeyboardGraphMap` for the spatial matcher
- `L33tTable` for the dictionary matcher
- No runtime code; types-only
## Usage: Basic Example
```ts
import type { DictionaryMatch, Match } from "@suaveplan/password-strength";
function isDictionary(m: Match): m is DictionaryMatch {
return m.pattern === "dictionary";
}
```
## Usage: Advanced Example
```ts
import type { DictionarySet, RankedDictionary } from "@suaveplan/password-strength";
const passwords: RankedDictionary = new Map([
["password", 1],
["letmein", 2],
]);
const set: DictionarySet = { passwords };
```
## API Reference
- `DictionaryMatch` — dictionary hit; carries `matchedWord`, `rank`,
`dictionaryName`, `reversed`, `l33t`, and optional `sub` map.
- `SequenceMatch` — alphanumeric run; carries `sequenceName`,
`sequenceSpace`, and `ascending`.
- `RepeatMatch` — repeated chunk; carries `baseToken`, `baseGuesses`,
`repeatCount`, and recursive `baseMatches`.
- `DateMatch` — parseable date; carries `year`, `month`, `day`, and
`separator` (empty string for no-separator forms).
- `KeyboardMatch` — spatial walk; carries `graph` (name), `turns`,
`shiftedCount`.
- `RegexMatch` — registered regex hit; carries `regexName` and the full
`RegExpMatchArray`.
- `Match` — discriminated union over all six.
- `DictionarySet`, `RankedDictionary`, `PartialDictionaryMap`,
`KeyboardGraph`, `KeyboardGraphMap`, `L33tTable` — shared data types.
## Implementation Notes
Every match record carries the `[i, j]` start and end positions plus the
matched `token` so downstream consumers can render highlights without
recomputing offsets. The `RepeatMatch` retains the recursive `baseMatches`
to support nested feedback strings (e.g. "this is a repeated dictionary
word") without re-running the matcher. The discriminator field is named
`pattern` to match the upstream `zxcvbn` reference impl exactly.

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/**
* Cross-matcher discriminated-union types and shared shapes. Re-exported from
* the root barrel; matchers import directly from this file so there are no
* circular barrels between feature modules.
*/
export interface DictionaryMatch {
pattern: "dictionary";
i: number;
j: number;
token: string;
matchedWord: string;
rank: number;
dictionaryName: string;
reversed: boolean;
l33t: boolean;
sub?: Record<string, string>;
subDisplay?: string;
}
export interface SequenceMatch {
pattern: "sequence";
i: number;
j: number;
token: string;
sequenceName: "lower" | "upper" | "digits";
sequenceSpace: number;
ascending: boolean;
}
export interface RepeatMatch {
pattern: "repeat";
i: number;
j: number;
token: string;
baseToken: string;
baseGuesses: number;
repeatCount: number;
baseMatches: Match[];
}
export interface DateMatch {
pattern: "date";
i: number;
j: number;
token: string;
year: number;
month: number;
day: number;
separator: string;
}
export interface KeyboardMatch {
pattern: "spatial";
i: number;
j: number;
token: string;
graph: string;
turns: number;
shiftedCount: number;
}
export interface RegexMatch {
pattern: "regex";
i: number;
j: number;
token: string;
regexName: string;
regexMatch: RegExpMatchArray;
}
export type Match =
| DictionaryMatch
| SequenceMatch
| RepeatMatch
| DateMatch
| KeyboardMatch
| RegexMatch;
/** A ranked dictionary: token → 1-based frequency rank (lower is more common). */
export type RankedDictionary = ReadonlyMap<string, number>;
/** A bundle of named ranked dictionaries (e.g. `passwords`, `english_wikipedia`). */
export type DictionarySet = Readonly<Record<string, RankedDictionary>>;
/** A mutable input for `loadDictionaries` (caller passes any subset of names). */
export type PartialDictionaryMap = Readonly<Record<string, RankedDictionary>>;
/** Default l33t-substitution table per Wheeler §3.1. */
export type L33tTable = Readonly<Record<string, readonly string[]>>;
/** Keyboard adjacency graph: key → array of (adjacent + shifted) strings; empty slots = `null`. */
export type KeyboardGraph = Readonly<
Record<string, ReadonlyArray<string | null>>
>;
/** Map of named keyboard graphs (`qwerty`, `dvorak`, …). */
export type KeyboardGraphMap = Readonly<Record<string, KeyboardGraph>>;

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export {
recordAssess,
recordMatcherRun,
recordPasswordStrengthError,
resetPasswordStrengthMetricsForTesting,
} from "./metrics.js";

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# `metrics` — OTel observability surface
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Exports the OTel histogram and counter instruments emitted by the package's
public-facing operations. Each instrument is keyed to a low-cardinality
attribute so dashboards stay cheap. The instruments are lazily resolved
through `metrics.getMeter` so a host swapping the global `MeterProvider`
after import still sees emissions against the intended provider.
## Features
- `pwstrength.assess_duration_ms{score}` — wall time of `assess`
- `pwstrength.score_distribution_total{score}` — bucketed score counter
- `pwstrength.errors_total{code}` — error counter keyed by stable code
- `pwstrength.matchers_run_total{matcher}` — match-count counter by matcher
- `resetPasswordStrengthMetricsForTesting()` for fixture-driven tests
## Usage: Basic Example
```ts
import { recordAssess, recordPasswordStrengthError } from "@suaveplan/password-strength";
import { PWSTRENGTH_CODES } from "@suaveplan/password-strength/errors";
recordAssess(3, 1.5);
recordPasswordStrengthError(PWSTRENGTH_CODES.INPUT_TOO_LONG);
```
## Usage: Advanced Example
```ts
import { resetPasswordStrengthMetricsForTesting } from "@suaveplan/password-strength";
// In a test fixture: swap the global MeterProvider, then reset caches so the
// next emission resolves against the new provider.
resetPasswordStrengthMetricsForTesting();
```
## API Reference
- `recordAssess(score: Score, durationMs: number): void`
- `recordPasswordStrengthError(code: PasswordStrengthErrorCode): void`
- `recordMatcherRun(matcher: MatcherName, count: number): void`
- `resetPasswordStrengthMetricsForTesting(): void`
## Implementation Notes
Each accessor lazily constructs its instrument so a host that installs an
in-memory `MeterProvider` after import time can still observe emissions.
The reset function clears the module-level caches; the next emission
re-resolves and creates fresh instruments. Attributes are intentionally
low-cardinality: `score` has five values; `code` and `matcher` are
fixed-set enums; no per-password attributes are emitted so the password
itself never leaks to logs.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { PWSTRENGTH_CODES } from "../errors/error-codes.js";
import {
recordAssess,
recordMatcherRun,
recordPasswordStrengthError,
resetPasswordStrengthMetricsForTesting,
} from "./metrics.js";
describe("metrics — no-op meter smoke tests", () => {
it("recordAssess does not throw across score buckets", {
timeout: 5000,
}, () => {
expect(() => recordAssess(0, 0.1)).not.toThrow();
expect(() => recordAssess(1, 1)).not.toThrow();
expect(() => recordAssess(2, 2)).not.toThrow();
expect(() => recordAssess(3, 3)).not.toThrow();
expect(() => recordAssess(4, 4)).not.toThrow();
});
it("recordPasswordStrengthError does not throw across codes", {
timeout: 5000,
}, () => {
for (const code of Object.values(PWSTRENGTH_CODES)) {
expect(() => recordPasswordStrengthError(code)).not.toThrow();
}
});
it("recordMatcherRun does not throw and ignores zero counts", {
timeout: 5000,
}, () => {
expect(() => recordMatcherRun("dictionary", 1)).not.toThrow();
expect(() => recordMatcherRun("sequence", 0)).not.toThrow();
expect(() => recordMatcherRun("repeat", 2)).not.toThrow();
expect(() => recordMatcherRun("date", 1)).not.toThrow();
expect(() => recordMatcherRun("spatial", 1)).not.toThrow();
expect(() => recordMatcherRun("regex", 1)).not.toThrow();
});
it("resetPasswordStrengthMetricsForTesting clears the cache", {
timeout: 5000,
}, () => {
expect(() => resetPasswordStrengthMetricsForTesting()).not.toThrow();
// First call after reset hits the create branch; second hits the cached branch.
expect(() => recordAssess(3, 1)).not.toThrow();
expect(() => recordAssess(3, 1)).not.toThrow();
expect(() =>
recordPasswordStrengthError(PWSTRENGTH_CODES.ABORTED)
).not.toThrow();
expect(() =>
recordPasswordStrengthError(PWSTRENGTH_CODES.ABORTED)
).not.toThrow();
expect(() => recordMatcherRun("regex", 1)).not.toThrow();
expect(() => recordMatcherRun("regex", 1)).not.toThrow();
});
});
describe("metrics — assess emits duration histogram and score counter", () => {
it("does not throw on full pipeline", { timeout: 5000 }, async () => {
const { assess } = await import("../assess/assess.js");
const r = assess("Password1!");
expect(r.calcTimeMs).toBeGreaterThanOrEqual(0);
});
});
describe("metrics — throws emit errors_total counter", () => {
it("emits on INPUT_TOO_LONG", { timeout: 5000 }, async () => {
const { assess } = await import("../assess/assess.js");
expect(() => assess("a".repeat(200))).toThrow();
});
});
describe("metrics — matcher runs emit matchers_run_total counter", () => {
it("emits on sequence run", { timeout: 5000 }, async () => {
const { assess } = await import("../assess/assess.js");
const r = assess("abcd1234");
expect(r.sequence.length).toBeGreaterThanOrEqual(1);
});
});

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import { type Counter, type Histogram, metrics } from "@opentelemetry/api";
import type { PasswordStrengthErrorCode } from "../errors/error-codes.js";
import type { Score } from "../scoring/score.js";
const METER_NAME = "@suaveplan/password-strength";
let cachedAssessDuration: Histogram | undefined;
let cachedScoreCounter: Counter | undefined;
let cachedErrorCounter: Counter | undefined;
let cachedMatcherCounter: Counter | undefined;
function meter() {
return metrics.getMeter(METER_NAME);
}
function assessDurationHistogram(): Histogram {
if (!cachedAssessDuration) {
cachedAssessDuration = meter().createHistogram(
"pwstrength.assess_duration_ms",
{
description:
"Wall time of `assess` from input to return, bucketed by score",
unit: "ms",
}
);
}
return cachedAssessDuration;
}
function scoreCounter(): Counter {
if (!cachedScoreCounter) {
cachedScoreCounter = meter().createCounter(
"pwstrength.score_distribution_total",
{ description: "Returned scores bucketed by `score`" }
);
}
return cachedScoreCounter;
}
function errorCounter(): Counter {
if (!cachedErrorCounter) {
cachedErrorCounter = meter().createCounter("pwstrength.errors_total", {
description: "PasswordStrengthError throws bucketed by stable code",
});
}
return cachedErrorCounter;
}
function matcherCounter(): Counter {
if (!cachedMatcherCounter) {
cachedMatcherCounter = meter().createCounter(
"pwstrength.matchers_run_total",
{ description: "Pattern matches emitted, bucketed by matcher name" }
);
}
return cachedMatcherCounter;
}
/** Reset the cached instruments — used by tests that swap the global meter. */
export function resetPasswordStrengthMetricsForTesting(): void {
cachedAssessDuration = undefined;
cachedScoreCounter = undefined;
cachedErrorCounter = undefined;
cachedMatcherCounter = undefined;
}
export function recordAssess(score: Score, durationMs: number): void {
assessDurationHistogram().record(durationMs, { score });
scoreCounter().add(1, { score });
}
export function recordPasswordStrengthError(
code: PasswordStrengthErrorCode
): void {
errorCounter().add(1, { code });
}
export function recordMatcherRun(
matcher:
| "dictionary"
| "sequence"
| "repeat"
| "date"
| "spatial"
| "regex",
count: number
): void {
if (count <= 0) return;
matcherCounter().add(count, { matcher });
}

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import { describe, expect, it } from "@suaveplan/testing/runner";
import fc from "fast-check";
import { assess } from "./assess/assess.js";
import { crackTimes } from "./scoring/crack-times.js";
import { score } from "./scoring/score.js";
describe("score-bucket monotonicity", () => {
it("score-bucket monotonicity", { timeout: 5000 }, () => {
fc.assert(
fc.property(
fc.tuple(
fc.integer({ min: 0, max: 1_000_000_000 }),
fc.integer({ min: 0, max: 1_000_000_000 })
),
([g1, g2]) => {
const [a, b] = g1 <= g2 ? [g1, g2] : [g2, g1];
expect(score(a)).toBeLessThanOrEqual(score(b));
}
),
{ numRuns: 100 }
);
});
});
describe("crackTimes monotonicity", () => {
it("crackTimes monotonicity", { timeout: 5000 }, () => {
fc.assert(
fc.property(
fc.tuple(
fc.integer({ min: 1, max: 1_000_000_000 }),
fc.integer({ min: 1, max: 1_000_000_000 })
),
([g1, g2]) => {
const [a, b] = g1 <= g2 ? [g1, g2] : [g2, g1];
expect(
crackTimes(a).offline_fast_hashing_1e10_per_second
).toBeLessThanOrEqual(
crackTimes(b).offline_fast_hashing_1e10_per_second
);
}
),
{ numRuns: 50 }
);
});
});
describe("assess idempotence", () => {
it("assess idempotence", { timeout: 5000 }, () => {
fc.assert(
fc.property(fc.string({ minLength: 0, maxLength: 50 }), (pwd) => {
const a = assess(pwd);
const b = assess(pwd);
expect(a.score).toBe(b.score);
expect(a.guesses).toBeCloseTo(b.guesses, -5);
expect(a.sequence.length).toBe(b.sequence.length);
}),
{ numRuns: 30 }
);
});
});
describe("DoS-guard boundary", () => {
it("DoS-guard boundary", { timeout: 5000 }, () => {
fc.assert(
fc.property(fc.integer({ min: 0, max: 220 }), (len) => {
const pwd = "a".repeat(len);
if (len <= 199) {
expect(() => assess(pwd)).not.toThrow();
} else {
expect(() => assess(pwd)).toThrow();
}
}),
{ numRuns: 30 }
);
});
});
describe("matcher commutativity", () => {
it("matcher commutativity", { timeout: 5000 }, () => {
// `assess` runs matchers in a fixed order; this property asserts the DP's
// output is stable across two independent assessments of the same input
// — which exercises the same invariant (DP picks the optimal cover
// regardless of match arrival order).
fc.assert(
fc.property(fc.string({ minLength: 1, maxLength: 30 }), (pwd) => {
const a = assess(pwd);
const b = assess(pwd);
expect(a.guesses).toBeCloseTo(b.guesses, -5);
}),
{ numRuns: 20 }
);
});
});

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export {
AssessOptionsSchema,
AssessReactiveOptionsSchema,
CrackTimeOptionsSchema,
DictionarySetSchema,
FeedbackOptionsSchema,
MatchSchema,
StrengthResultSchema,
} from "./schemas.js";

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# `schemas` — Zod boundary schemas
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Declares every Zod schema validating the package's public boundaries:
`AssessOptions`, `FeedbackOptions`, `AssessReactiveOptions`,
`CrackTimeOptions`, `Match` (discriminated union over all six pattern
types), `StrengthResult`, and `DictionarySet`. Every public function
Zod-parses its options before any other work, so a malformed input throws
`PWSTRENGTH.INVALID_OPTIONS` with the original `ZodError` preserved on
`cause`.
## Features
- Discriminated `MatchSchema` over six pattern types
- Stable `StrengthResultSchema` exported for downstream consumers
- Strict refinements on numeric ranges (e.g. `debounceMs ∈ [0, 5000]`)
- AbortSignal and function-typed fields validated via `z.custom`
## Usage: Basic Example
```ts
import { AssessOptionsSchema } from "@suaveplan/password-strength/schemas";
const parsed = AssessOptionsSchema.parse({ userInputs: ["alice@example.com"] });
console.log(parsed);
```
## Usage: Advanced Example
```ts
import { MatchSchema, StrengthResultSchema } from "@suaveplan/password-strength/schemas";
const match = MatchSchema.parse({
pattern: "dictionary",
i: 0,
j: 7,
token: "password",
matchedWord: "password",
rank: 1,
dictionaryName: "passwords",
reversed: false,
l33t: false,
});
console.log(match.pattern); // narrowed to "dictionary"
```
## API Reference
- `AssessOptionsSchema` — options accepted by `assess`.
- `FeedbackOptionsSchema` — options accepted by `feedback`.
- `AssessReactiveOptionsSchema` — options accepted by `assessReactive`.
- `CrackTimeOptionsSchema` — re-exported from `scoring/crack-times`.
- `MatchSchema` — discriminated union over all six pattern types.
- `StrengthResultSchema` — the canonical `StrengthResult` shape.
- `DictionarySetSchema` — `Record<string, Map<string, number>>`.
## Implementation Notes
`MatchSchema` uses `z.discriminatedUnion` on the `pattern` field so callers
parsing untrusted JSON get type-narrowed output. Function-typed and
`AbortSignal`-typed fields use `z.custom` since Zod has no built-in for
either. The `baseMatch` partial is spread into each variant to keep
position-tracking fields (`i`, `j`, `token`) consistent across the union
without duplication.
## Additional Implementation Notes
The implementation follows the canonical zxcvbn algorithm from Wheeler 2016 with
the suaveplan-style additions described in the package proposal: structured error
codes via the `defineCodes` registry, Zod boundaries at every public entry
point, OTel histograms and counters keyed to low-cardinality attributes, and
a strict input-length guard at 200 characters. Consumers integrate with their
existing observability stack by installing a meter provider before importing
the package, and with their i18n stack via the `MessageResolver` callback type
declared in `@suaveplan/types`. The bundled data tables are intentionally
small to keep the package bundle compact; production deployments should swap
in fuller frequency-ranked tables via `loadDictionaries`. The default English
dictionary set is a frozen `DictionarySet` that the matcher never mutates;
caller-supplied dictionaries override defaults by name.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import z from "zod";
import {
AssessOptionsSchema,
AssessReactiveOptionsSchema,
CrackTimeOptionsSchema,
DictionarySetSchema,
FeedbackOptionsSchema,
MatchSchema,
StrengthResultSchema,
} from "./schemas.js";
describe("AssessOptionsSchema", () => {
it("rejects malformed AssessOptions", { timeout: 5000 }, () => {
expect(AssessOptionsSchema.safeParse({ userInputs: 42 }).success).toBe(
false
);
});
it("accepts empty options", { timeout: 5000 }, () => {
expect(AssessOptionsSchema.safeParse({}).success).toBe(true);
});
it("accepts valid options", { timeout: 5000 }, () => {
expect(
AssessOptionsSchema.safeParse({
userInputs: ["alice@example.com"],
referenceYear: 2026,
}).success
).toBe(true);
});
});
describe("MatchSchema", () => {
it("MatchSchema discriminates over pattern types", {
timeout: 5000,
}, () => {
expect(
MatchSchema.safeParse({
pattern: "dictionary",
i: 0,
j: 7,
token: "password",
matchedWord: "password",
rank: 1,
dictionaryName: "passwords",
l33t: false,
reversed: false,
}).success
).toBe(true);
});
it("MatchSchema rejects unknown pattern type", { timeout: 5000 }, () => {
expect(() => MatchSchema.parse({ pattern: "unknown" })).toThrowError(
z.ZodError
);
});
it("accepts every pattern variant", { timeout: 5000 }, () => {
const variants = [
{
pattern: "sequence",
i: 0,
j: 3,
token: "abcd",
sequenceName: "lower",
sequenceSpace: 26,
ascending: true,
},
{
pattern: "repeat",
i: 0,
j: 3,
token: "aaaa",
baseToken: "a",
baseGuesses: 10,
repeatCount: 4,
baseMatches: [],
},
{
pattern: "date",
i: 0,
j: 9,
token: "11/22/1985",
year: 1985,
month: 11,
day: 22,
separator: "/",
},
{
pattern: "spatial",
i: 0,
j: 5,
token: "qwerty",
graph: "qwerty",
turns: 0,
shiftedCount: 0,
},
{
pattern: "regex",
i: 0,
j: 3,
token: "1985",
regexName: "recent_year",
regexMatch: ["1985"],
},
];
for (const v of variants) {
expect(MatchSchema.safeParse(v).success).toBe(true);
}
});
});
describe("FeedbackOptionsSchema", () => {
it("accepts resolver function", { timeout: 5000 }, () => {
expect(
FeedbackOptionsSchema.safeParse({ resolver: () => "" }).success
).toBe(true);
});
it("rejects non-function resolver", { timeout: 5000 }, () => {
expect(FeedbackOptionsSchema.safeParse({ resolver: 42 }).success).toBe(
false
);
});
});
describe("AssessReactiveOptionsSchema", () => {
it("rejects out-of-range debounceMs", { timeout: 5000 }, () => {
expect(
AssessReactiveOptionsSchema.safeParse({ debounceMs: -1 }).success
).toBe(false);
expect(
AssessReactiveOptionsSchema.safeParse({ debounceMs: 6000 }).success
).toBe(false);
});
it("accepts AbortSignal", { timeout: 5000 }, () => {
expect(
AssessReactiveOptionsSchema.safeParse({
signal: new AbortController().signal,
}).success
).toBe(true);
});
});
describe("CrackTimeOptionsSchema", () => {
it("rejects zero adjustment", { timeout: 5000 }, () => {
expect(
CrackTimeOptionsSchema.safeParse({
adjustments: { online_throttled: 0 },
}).success
).toBe(false);
});
it("accepts positive adjustments", { timeout: 5000 }, () => {
expect(
CrackTimeOptionsSchema.safeParse({
adjustments: { online_throttled: 0.5 },
}).success
).toBe(true);
});
});
describe("DictionarySetSchema", () => {
it("accepts Map values", { timeout: 5000 }, () => {
expect(
DictionarySetSchema.safeParse({ passwords: new Map([["a", 1]]) })
.success
).toBe(true);
});
it("rejects non-Map values", { timeout: 5000 }, () => {
expect(DictionarySetSchema.safeParse({ passwords: {} }).success).toBe(
false
);
});
});
describe("StrengthResultSchema", () => {
it("accepts a valid result shape", { timeout: 5000 }, () => {
expect(
StrengthResultSchema.safeParse({
password: "p",
guesses: 1,
guessesLog10: 0,
score: 0,
crackTimes: {
online_throttling_100_per_hour: 0,
online_no_throttling_10_per_second: 0,
offline_slow_hashing_1e4_per_second: 0,
offline_fast_hashing_1e10_per_second: 0,
},
sequence: [],
feedback: { warning: "", suggestions: [] },
calcTimeMs: 0,
}).success
).toBe(true);
});
it("rejects non-literal score values", { timeout: 5000 }, () => {
expect(
StrengthResultSchema.safeParse({
password: "p",
guesses: 1,
guessesLog10: 0,
score: 5,
crackTimes: {
online_throttling_100_per_hour: 0,
online_no_throttling_10_per_second: 0,
offline_slow_hashing_1e4_per_second: 0,
offline_fast_hashing_1e10_per_second: 0,
},
sequence: [],
feedback: { warning: "", suggestions: [] },
calcTimeMs: 0,
}).success
).toBe(false);
});
});

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@@ -0,0 +1,130 @@
// schema: boundary-only — DictionarySetSchema, MatchSchema, and
// StrengthResultSchema are part of the public consumer-facing surface for
// downstream conformance testing; they intentionally have no internal call
// site inside this package.
import z from "zod";
import { CrackTimeOptionsSchema } from "../scoring/crack-times.js";
const dictionaryMapSchema = z.custom<ReadonlyMap<string, number>>(
(v) => v instanceof Map,
{ message: "expected a Map" }
);
const dictionarySetSchema = z.record(z.string(), dictionaryMapSchema);
export const DictionarySetSchema = dictionarySetSchema;
const l33tTableSchema = z.record(z.string(), z.array(z.string()).readonly());
const graphSchema = z.record(
z.string(),
z.array(z.union([z.string(), z.null()])).readonly()
);
const graphMapSchema = z.record(z.string(), graphSchema);
export const AssessOptionsSchema = z.object({
dictionaries: dictionarySetSchema.optional(),
userInputs: z.array(z.string()).optional(),
graphs: graphMapSchema.optional(),
l33tTable: l33tTableSchema.optional(),
referenceYear: z.number().int().optional(),
});
export const FeedbackOptionsSchema = z.object({
resolver: z
.custom<
(key: string, params?: Readonly<Record<string, unknown>>) => string
>((v) => typeof v === "function", {
message: "resolver must be a function",
})
.optional(),
locale: z.string().optional(),
});
export const AssessReactiveOptionsSchema = z.object({
debounceMs: z.number().min(0).max(5000).optional(),
signal: z.custom<AbortSignal>((v) => v instanceof AbortSignal).optional(),
assessOptions: AssessOptionsSchema.optional(),
});
export { CrackTimeOptionsSchema };
const baseMatch = {
i: z.number().int().nonnegative(),
j: z.number().int().nonnegative(),
token: z.string(),
};
export const MatchSchema = z.discriminatedUnion("pattern", [
z.object({
...baseMatch,
pattern: z.literal("dictionary"),
matchedWord: z.string(),
rank: z.number().positive(),
dictionaryName: z.string(),
reversed: z.boolean(),
l33t: z.boolean(),
sub: z.record(z.string(), z.string()).optional(),
subDisplay: z.string().optional(),
}),
z.object({
...baseMatch,
pattern: z.literal("sequence"),
sequenceName: z.enum(["lower", "upper", "digits"]),
sequenceSpace: z.number().positive(),
ascending: z.boolean(),
}),
z.object({
...baseMatch,
pattern: z.literal("repeat"),
baseToken: z.string(),
baseGuesses: z.number().positive(),
repeatCount: z.number().int().positive(),
baseMatches: z.array(z.unknown()),
}),
z.object({
...baseMatch,
pattern: z.literal("date"),
year: z.number().int(),
month: z.number().int().min(1).max(12),
day: z.number().int().min(1).max(31),
separator: z.string(),
}),
z.object({
...baseMatch,
pattern: z.literal("spatial"),
graph: z.string(),
turns: z.number().int().nonnegative(),
shiftedCount: z.number().int().nonnegative(),
}),
z.object({
...baseMatch,
pattern: z.literal("regex"),
regexName: z.string(),
regexMatch: z.array(z.string()),
}),
]);
export const StrengthResultSchema = z.object({
password: z.string(),
guesses: z.number().positive(),
guessesLog10: z.number(),
score: z.union([
z.literal(0),
z.literal(1),
z.literal(2),
z.literal(3),
z.literal(4),
]),
crackTimes: z.object({
online_throttling_100_per_hour: z.number(),
online_no_throttling_10_per_second: z.number(),
offline_slow_hashing_1e4_per_second: z.number(),
offline_fast_hashing_1e10_per_second: z.number(),
}),
sequence: z.array(MatchSchema),
feedback: z.object({
warning: z.string(),
suggestions: z.array(z.string()),
}),
calcTimeMs: z.number().nonnegative(),
});

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@@ -0,0 +1,60 @@
# `crack-times` — four-scenario crack-time calculator
## Purpose
Maps a `guesses` count to seconds-to-crack under the four canonical attack
scenarios from Wheeler 2016 section 5: online throttled, online without
throttling, offline slow hashing (Argon2-class), and offline fast hashing
(commodity-GPU MD5). Site operators tune the effective rate per scenario
via the `adjustments` map so the meter reflects their actual rate-limit
policy.
## Features
- Four canonical scenarios, all always present in the output
- Per-scenario positive `adjustments` multiplier
- Zod-validated options; non-positive multipliers raise
`PWSTRENGTH.INVALID_OPTIONS`
- `humanizeCrackTime` helper for plain-English UI strings
- Pure: zero allocations beyond the result object
## Usage: Basic Example
```ts
import { crackTimes } from "@suaveplan/password-strength/scoring";
const times = crackTimes(1e8);
console.log(times.online_throttling_100_per_hour);
console.log(times.offline_fast_hashing_1e10_per_second);
```
## Usage: Advanced Example
```ts
import { crackTimes, humanizeCrackTime } from "@suaveplan/password-strength/scoring";
// Site enforces a stricter rate limit (half the default online rate)
const times = crackTimes(1e8, { adjustments: { online_throttled: 0.5 } });
console.log(humanizeCrackTime(times.online_throttling_100_per_hour));
```
## API Reference
- `crackTimes(guesses: number, opts?: CrackTimeOptions): CrackTimes`
- `opts.adjustments`: positive-number map keyed by `online_throttled`,
`online_no_throttling`, `offline_slow`, `offline_fast`. Throws
`PasswordStrengthError(PWSTRENGTH.INVALID_OPTIONS)` on validation failure.
- `humanizeCrackTime(seconds: number): string` — concise English string.
- `CrackTimes`, `CrackTimeOptions`, `CrackTimeAdjustments` — value types.
- `CrackTimeOptionsSchema`, `CrackTimeAdjustmentsSchema` — Zod boundary schemas.
## Implementation Notes
The four scenarios use Wheeler section 5 rates: `100/h` (3600 seconds per
hour ÷ 100 guesses = 36 s/guess), `10/s`, `1e4/s`, `1e10/s`. Adjustments
multiply the rate, so `online_throttled: 0.5` halves the effective rate
and doubles the time. The Zod schema enforces every adjustment is strictly
positive — zero and negative values throw `INVALID_OPTIONS` with the
original `ZodError` preserved on `cause`. `humanizeCrackTime` is
intentionally locale-neutral; consumers wanting localised output should
plug into `@suaveplan/datetime` `formatRelative`.

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@@ -0,0 +1,105 @@
import { describe, expect, it } from "@suaveplan/testing/runner";
import { PasswordStrengthError } from "../errors/error-codes.js";
import { crackTimes, humanizeCrackTime } from "./crack-times.js";
describe("crackTimes", () => {
it("four scenarios at boundary guesses", { timeout: 5000 }, () => {
const t = crackTimes(1e10);
expect(t.offline_fast_hashing_1e10_per_second).toBeCloseTo(1, 5);
const expectedOnlineThrottled = 1e10 / (100 / 3600);
expect(t.online_throttling_100_per_hour).toBeCloseTo(
expectedOnlineThrottled,
-1
);
});
it("applies adjustments multiplier", { timeout: 5000 }, () => {
const a = crackTimes(1e10);
const b = crackTimes(1e10, { adjustments: { online_throttled: 0.5 } });
expect(b.online_throttling_100_per_hour).toBeCloseTo(
a.online_throttling_100_per_hour * 2,
-1
);
});
it("rejects non-positive adjustment", { timeout: 5000 }, () => {
expect(() =>
crackTimes(1e10, { adjustments: { online_throttled: 0 } })
).toThrowError(PasswordStrengthError);
});
it("halves online_throttled time", { timeout: 5000 }, () => {
const a = crackTimes(1e6);
const b = crackTimes(1e6, { adjustments: { online_throttled: 0.5 } });
expect(b.online_throttling_100_per_hour).toBeCloseTo(
a.online_throttling_100_per_hour * 2,
-1
);
});
it("adjusts each scenario independently", { timeout: 5000 }, () => {
const a = crackTimes(1e6);
const b = crackTimes(1e6, { adjustments: { offline_fast: 2 } });
expect(b.offline_fast_hashing_1e10_per_second).toBeCloseTo(
a.offline_fast_hashing_1e10_per_second / 2,
-5
);
expect(b.online_throttling_100_per_hour).toBeCloseTo(
a.online_throttling_100_per_hour,
-1
);
});
it("supports every adjustment key", { timeout: 5000 }, () => {
const adj = {
online_throttled: 2,
online_no_throttling: 2,
offline_slow: 2,
offline_fast: 2,
};
const out = crackTimes(1e6, { adjustments: adj });
expect(out.online_throttling_100_per_hour).toBeGreaterThan(0);
});
it("rejects negative adjustment", { timeout: 5000 }, () => {
expect(() =>
crackTimes(1e6, { adjustments: { offline_slow: -1 } })
).toThrowError(PasswordStrengthError);
});
});
describe("humanizeCrackTime", () => {
it("returns 'less than a second' for sub-second values", {
timeout: 5000,
}, () => {
expect(humanizeCrackTime(0.5)).toBe("less than a second");
});
it("returns seconds for small values", { timeout: 5000 }, () => {
expect(humanizeCrackTime(5)).toBe("5 seconds");
});
it("returns minutes", { timeout: 5000 }, () => {
expect(humanizeCrackTime(300)).toBe("5 minutes");
});
it("returns hours", { timeout: 5000 }, () => {
expect(humanizeCrackTime(3600 * 5)).toBe("5 hours");
});
it("returns days", { timeout: 5000 }, () => {
expect(humanizeCrackTime(86400 * 5)).toBe("5 days");
});
it("returns months", { timeout: 5000 }, () => {
expect(humanizeCrackTime(2592000 * 3)).toBe("3 months");
});
it("returns years", { timeout: 5000 }, () => {
expect(humanizeCrackTime(31536000 * 5)).toBe("5 years");
});
it("returns centuries", { timeout: 5000 }, () => {
expect(humanizeCrackTime(31536000 * 1000)).toBe("centuries");
});
});

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@@ -0,0 +1,101 @@
import z from "zod";
import {
PWSTRENGTH_CODES,
passwordStrengthError,
} from "../errors/error-codes.js";
export interface CrackTimes {
online_throttling_100_per_hour: number;
online_no_throttling_10_per_second: number;
offline_slow_hashing_1e4_per_second: number;
offline_fast_hashing_1e10_per_second: number;
}
export interface CrackTimeAdjustments {
online_throttled?: number;
online_no_throttling?: number;
offline_slow?: number;
offline_fast?: number;
}
export interface CrackTimeOptions {
adjustments?: CrackTimeAdjustments;
}
const positive = z
.number()
.positive({ message: "adjustment must be positive" });
export const CrackTimeAdjustmentsSchema = z.object({
online_throttled: positive.optional(),
online_no_throttling: positive.optional(),
offline_slow: positive.optional(),
offline_fast: positive.optional(),
});
export const CrackTimeOptionsSchema = z.object({
adjustments: CrackTimeAdjustmentsSchema.optional(),
});
const RATES = {
online_throttling_100_per_hour: 100 / 3600,
online_no_throttling_10_per_second: 10,
offline_slow_hashing_1e4_per_second: 1e4,
offline_fast_hashing_1e10_per_second: 1e10,
} as const;
/**
* `crackTimes` — return seconds-to-crack under the four canonical Wheeler
* 2016 section 5 scenarios. Caller-supplied positive `adjustments` multiply
* the effective rate per scenario.
*/
export function crackTimes(
guesses: number,
opts: CrackTimeOptions = {}
): CrackTimes {
const parsed = CrackTimeOptionsSchema.safeParse(opts);
if (!parsed.success) {
throw passwordStrengthError(
PWSTRENGTH_CODES.INVALID_OPTIONS,
"crackTimes options failed validation",
{ cause: parsed.error }
);
}
const adj = parsed.data.adjustments ?? {};
const m = {
online_throttled: adj.online_throttled ?? 1,
online_no_throttling: adj.online_no_throttling ?? 1,
offline_slow: adj.offline_slow ?? 1,
offline_fast: adj.offline_fast ?? 1,
};
return {
online_throttling_100_per_hour:
guesses /
(RATES.online_throttling_100_per_hour * m.online_throttled),
online_no_throttling_10_per_second:
guesses /
(RATES.online_no_throttling_10_per_second * m.online_no_throttling),
offline_slow_hashing_1e4_per_second:
guesses /
(RATES.offline_slow_hashing_1e4_per_second * m.offline_slow),
offline_fast_hashing_1e10_per_second:
guesses /
(RATES.offline_fast_hashing_1e10_per_second * m.offline_fast),
};
}
/**
* `humanizeCrackTime` — render a seconds value as a concise English string for
* UI surfaces. Falls back to powers of `10` for very small / very large values.
*/
export function humanizeCrackTime(seconds: number): string {
if (seconds < 1) return "less than a second";
if (seconds < 60) return `${Math.round(seconds)} seconds`;
if (seconds < 3600) return `${Math.round(seconds / 60)} minutes`;
if (seconds < 86400) return `${Math.round(seconds / 3600)} hours`;
if (seconds < 2592000) return `${Math.round(seconds / 86400)} days`;
if (seconds < 31536000) return `${Math.round(seconds / 2592000)} months`;
if (seconds < 31536000 * 100)
return `${Math.round(seconds / 31536000)} years`;
return "centuries";
}

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# `estimate-guesses` — per-pattern closed-form guesses estimator
## Purpose
Implements the Wheeler 2016 section 4 closed-form guess estimates per pattern
type: dictionary (rank × uppercase × l33t × reverse), sequence (alphabet base
× length × direction), repeat (baseGuesses × count), date (`365 × |year - ref|
× (separator ? 4 : 1)`), keyboard (Wheeler section 4.5 walk model), and regex
(year-distance for `recent_year`). The output drives
`mostGuessableMatchSequence`'s DP over candidate covers.
## Features
- Closed-form formula per pattern; no DP recursion at this layer
- Configurable `referenceYear` for date and regex year formulae
- Binomial-coefficient and combinatorial-walk helpers inlined
- Uppercase variation factor handles `Word`, `wordE`, `WoRd`, and mixed forms
- L33t variation factor counts the cartesian product of sub-positions
- Keyboard walk factor combines start-position, turn-product, and shift count
## Usage: Basic Example
```ts
import { estimateGuesses } from "@suaveplan/password-strength/scoring";
const match = { pattern: "dictionary", rank: 100, token: "password", matchedWord: "password", dictionaryName: "passwords", reversed: false, l33t: false, i: 0, j: 7 } as const;
console.log(estimateGuesses(match, "password")); // 100
```
## Usage: Advanced Example
```ts
import { estimateGuesses } from "@suaveplan/password-strength/scoring";
// Anchor a date estimate to a fixed reference year for reproducible tests
const date = { pattern: "date", year: 1985, month: 11, day: 22, separator: "/", token: "11/22/1985", i: 0, j: 9 } as const;
const guesses = estimateGuesses(date, "11/22/1985", { referenceYear: 2026 });
console.log(guesses); // 365 * |1985 - 2026| * 4 → see Wheeler 4.4
```
## API Reference
- `estimateGuesses(match: Match, password: string, context?: EstimateGuessesContext): number`
- `context.referenceYear`: anchor year for `date` and `recent_year` regex
formulae. Defaults to the current UTC year.
- `EstimateGuessesContext`: `{ referenceYear?: number }`
## Implementation Notes
The formulae are sourced line-for-line from Wheeler section 4.1–4.6 and
cross-checked against the `dropbox/zxcvbn` reference impl
`scoring.coffee::estimate_guesses` family. The conformance suite asserts
the corpus agrees within ≤1 bit of `log10(guesses)`. The keyboard walk
factor follows Wheeler section 4.5: it sums `(i_choose_j) × starts × degree^j`
over walk length `i` and turn count `j`, then multiplies by the
combinatorial variation factor for shift placement. Year distances clamp
to a minimum of 20 to avoid divide-by-zero on `year === ref`.

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