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# i18n Modular Split — `@suaveplan/i18n` → 14 Sibling Packages
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- **Date:** 2026-05-05
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- **Status:** DESIGN APPROVED — pending spec-review loop, then transitions to OpenSpec proposals + implementation plan
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- **Scope:** Split the current `@suaveplan/i18n` monolith into 14 sibling packages under `packages/i18n/` matching the granularity of the rest of the genesis monorepo (cf. `crypto-*`, `drive-*`, `network-plugin-*`)
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- **Branch:** `genesis`
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- **Supersedes / amends (existing OpenSpec changes):** Folds the four already-shipped i18n changes (`i18n-storage-backends`, `i18n-formatters`, `i18n-spec-conformance`, `i18n-completion` — currently misplaced under `openspec/changes/archive/2026-05-04-*/`) into a coherent multi-package layout. Existing capability spec at `openspec/specs/i18n/spec.md` survives but is split across new capability files.
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---
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## 1. Overview
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`@suaveplan/i18n` today is a single ~121-source-file package that bundles eight unrelated concerns (catalog, parser, interpolation, pluralization, formatters, backends, detector, observability) behind one entry point. Every other domain in the monorepo with comparable surface area splits into many fine-grained sibling packages — `crypto-hash`, `crypto-curve`, `crypto-cipher`, `crypto-utils`, `crypto-vault`, `crypto-cli`, `crypto-bin`, `crypto-sodium`, `crypto-browser`, `crypto-core`, `crypto`; `drive`, `drive-template`, `drive-mesh-protocol`, `drive-plugin-chunks`, `drive-sharing`, `drive-transport-https`; `network` plus a dozen `network-plugin-*` siblings. The four OpenSpec changes that built the monolith were even **named** like sub-packages (`i18n-storage-backends`, `i18n-formatters`) — strongly implying split intent — but the implementation collapsed them into one package.
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This change brings i18n in line with the monorepo pattern: 13 new sibling packages plus a slimmed-down core, in dependency order so each layer commits before the next, and the core rewrite is the very last step.
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### 1.1. Decision summary
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| Topic | Decision | Section |
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|---|---|---|
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| Number of packages | 14 (1 shared runtime + 1 ICU parser + 8 formatters + 1 detector + 5 backends + 1 slim core; plus types-only additions to `@suaveplan/types`) | §3 |
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| Granularity for backends | Per-backend (matches monorepo "split when external deps differ" rule — `storage` pulls `@suaveplan/storage`, `fs-multifile` is server-only) | §6 |
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| Granularity for formatters | Per-formatter (matches user-stated lean toward fine-grained; trivial overhead since each is a thin `Intl.*` wrapper) | §5 |
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| Where shared atoms live | New `@suaveplan/i18n-shared` (runtime constants + `I18nError` + `I18N_CODES`) plus type-only additions to `@suaveplan/types` | §4 |
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| Backend interface location | `@suaveplan/types/i18n` (zero runtime — same pattern as the cross-package crypto contract) so backend packages do not depend on `@suaveplan/i18n` core | §4.1, §6 |
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| Core slim scope | Catalog + plugin slot (`createI18n` / `I18nInstance`) + middleware + observability + key utils + missing-key flow + schemas + conformance harness | §7 |
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| Back-compat | Slim `@suaveplan/i18n` root barrel re-exports the entire pre-split surface from the new packages — every existing `import { X } from "@suaveplan/i18n"` keeps working | §8 |
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| Wave order | 1 foundation → 2 parser → 3 formatters → 4 detector → 5 backends → 6 core (LAST) | §9 |
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| Crash-safety | Waves 1–5 are pure additions (zero edits to `packages/i18n/i18n/src/`). Each wave commits before the next. Only Wave 6 is destructive. | §9 |
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### 1.2. Final package layout
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```text
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packages/i18n/
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i18n/ ← Wave 6: slim core (catalog + plugin + middleware + observability)
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i18n-shared/ ← Wave 1: constants + I18N_CODES + I18nError class
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i18n-icu-parser/ ← Wave 2: parser + interpolation + pluralization
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i18n-formatter-number/ ← Wave 3: Intl.NumberFormat wrapper
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i18n-formatter-relative-time/ ← Wave 3: Intl.RelativeTimeFormat wrapper
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i18n-formatter-list/ ← Wave 3: Intl.ListFormat wrapper
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i18n-formatter-display-name/ ← Wave 3: Intl.DisplayNames wrapper
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i18n-formatter-collator/ ← Wave 3: Intl.Collator wrapper (NEW — not in monolith)
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i18n-formatter-segmenter/ ← Wave 3: Intl.Segmenter wrapper (NEW — not in monolith)
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i18n-formatter-date/ ← Wave 3: Intl.DateTimeFormat wrapper
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i18n-formatter-currency/ ← Wave 3: Intl.NumberFormat (currency) wrapper + ISO 4217 metadata
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i18n-detector/ ← Wave 4: locale detection chain
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i18n-backend-memory/ ← Wave 5: in-memory backend
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i18n-backend-http/ ← Wave 5: fetch-based backend
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i18n-backend-storage/ ← Wave 5: AbstractStorage backend (depends on @suaveplan/storage)
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i18n-backend-fs-multifile/ ← Wave 5: server-only Node fs backend
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i18n-backend-chained/ ← Wave 5: chained-fallback backend orchestrator
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locale-data/ ← UNCHANGED: ISO 3166 / ISO 639 static data
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```
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---
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## 2. Why now
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1. **Architectural drift.** The monolith violates the monorepo's own splitting pattern. Every package audit and parity check has to special-case i18n.
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2. **Tier leakage.** `i18n-backend-fs-multifile` uses `node:fs`, but the monolith is a universal-tier package — consumers in browser-tier code can accidentally tree-shake-ineligible imports. Split eliminates this.
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3. **Optional-deps awkwardness.** Today `@suaveplan/storage` is a hard dep of `@suaveplan/i18n` because of one backend. Consumers who never touch the storage backend still pay the install cost.
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4. **The original change names already implied this layout.** `i18n-storage-backends`, `i18n-formatters`, `i18n-completion`, `i18n-spec-conformance` — every prior change was named per-feature. The implementation simply forgot to split.
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5. **Crash-safety for in-flight work.** With the monolith, any session that crashes mid-edit can leave the only i18n package in a half-state. With the split, leaf packages commit independently — a crashed Wave 6 leaves Waves 1–5 fully-shipped on disk.
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6. **Downstream React stack.** `@suaveplan/react-i18n` is the binding layer — splitting i18n now (before more downstream React packages land) means React consumers can pull only the formatters / backends they need.
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---
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## 3. The 14 packages — role and dependency map
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| # | Package | Tier | Role | Direct deps (within i18n family) |
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|---|---|---|---|---|
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| 1 | `@suaveplan/i18n-shared` | universal | Constants, error codes, error class | none |
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| 2 | `@suaveplan/i18n-icu-parser` | universal | ICU parser, interpolation engine, pluralization rules, ICU render with `FormatBridge` DI seam | `@suaveplan/i18n-shared` |
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| 3 | `@suaveplan/i18n-formatter-number` | universal | `Intl.NumberFormat` wrapper | `@suaveplan/i18n-shared` |
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| 4 | `@suaveplan/i18n-formatter-relative-time` | universal | `Intl.RelativeTimeFormat` wrapper | `@suaveplan/i18n-shared` |
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| 5 | `@suaveplan/i18n-formatter-list` | universal | `Intl.ListFormat` wrapper | `@suaveplan/i18n-shared` |
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| 6 | `@suaveplan/i18n-formatter-display-name` | universal | `Intl.DisplayNames` wrapper | `@suaveplan/i18n-shared` |
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| 7 | `@suaveplan/i18n-formatter-collator` | universal | `Intl.Collator` wrapper | `@suaveplan/i18n-shared` |
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| 8 | `@suaveplan/i18n-formatter-segmenter` | universal | `Intl.Segmenter` wrapper | `@suaveplan/i18n-shared` |
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| 9 | `@suaveplan/i18n-formatter-date` | universal | `Intl.DateTimeFormat` wrapper | `@suaveplan/i18n-shared` |
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| 10 | `@suaveplan/i18n-formatter-currency` | universal | Currency wrapper + ISO 4217 metadata | `@suaveplan/i18n-shared`, `@suaveplan/i18n-formatter-number` |
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| 11 | `@suaveplan/i18n-detector` | universal | Locale detection chain | `@suaveplan/i18n-shared`, `@suaveplan/locale-data` |
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| 12 | `@suaveplan/i18n-backend-memory` | universal | In-memory `Backend` impl | `@suaveplan/i18n-shared` |
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| 13 | `@suaveplan/i18n-backend-http` | universal | Fetch-based `Backend` impl | `@suaveplan/i18n-shared` |
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| 14 | `@suaveplan/i18n-backend-storage` | universal | `AbstractStorage`-backed `Backend` impl | `@suaveplan/i18n-shared`, `@suaveplan/storage` |
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| 15 | `@suaveplan/i18n-backend-fs-multifile` | server | Node `fs` multi-file `Backend` impl | `@suaveplan/i18n-shared` |
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| 16 | `@suaveplan/i18n-backend-chained` | universal | Chained-fallback `Backend` orchestrator | `@suaveplan/i18n-shared` |
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| 17 | `@suaveplan/i18n` | universal | Slim core: catalog + plugin slot + middleware + observability + key utils + missing-key flow | All of 1–16 (re-exported by root barrel) |
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Plus, types-only additions to `@suaveplan/types` (Wave 1a — not a new package):
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```text
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packages/primitives/types/src/i18n/
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i18n.types.ts ← Backend, BackendCapabilities, TranslationRecord,
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LocaleNamespace, MissingKeyHandler, MessageLoader,
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NamespacedCatalogMap, TranslationCatalogMap, LookupResult
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index.ts
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```
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### 3.1. Dependency graph (ASCII)
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```text
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@suaveplan/types ──────────┬─── (every package — types-only)
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│
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@suaveplan/i18n-shared ────┼─── i18n-icu-parser
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├─── i18n-formatter-{number,relative-time,list,display-name,
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│ collator,segmenter,date}
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├─── i18n-formatter-currency ── i18n-formatter-number
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├─── i18n-detector ── @suaveplan/locale-data
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├─── i18n-backend-{memory,http,fs-multifile,chained}
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├─── i18n-backend-storage ── @suaveplan/storage
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│
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▼
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@suaveplan/i18n (slim core, re-exports everything)
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```
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No cycles. Every leaf depends only on `@suaveplan/i18n-shared` plus (optionally) one external for tier-specific work. The slim core depends on all 16 leaves.
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---
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## 4. Wave 1a — `@suaveplan/types/i18n` (types-only)
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The `Backend` interface and its peers move into `@suaveplan/types` so backend packages can implement it without depending on `@suaveplan/i18n`. This mirrors the cross-package crypto contract already in `@suaveplan/types` (`Authority`, `KeySlotPublic/Private`, `SlotId`, `DomainTag`, `AuthorityVerifier`, `AeadOps`).
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Add `packages/primitives/types/src/i18n/i18n.types.ts`:
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```typescript
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export interface TranslationRecord {
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readonly [key: string]: string | TranslationRecord;
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}
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export interface LocaleNamespace {
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readonly locale: string;
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readonly namespace: string;
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}
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export interface BackendCapabilities {
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readonly supportsBulkRead: boolean;
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readonly supportsWrite: boolean;
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readonly supportsLastModified: boolean;
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}
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export interface Backend {
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readonly name: string;
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readonly capabilities: BackendCapabilities;
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read(locale: string, namespace: string): Promise<TranslationRecord>;
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readMulti?(
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locale: string,
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namespaces: readonly string[],
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): Promise<Record<string, TranslationRecord>>;
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save?(
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locale: string,
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namespace: string,
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record: TranslationRecord,
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): Promise<void>;
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lastModified?(locale: string, namespace: string): Promise<number | undefined>;
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init?(): Promise<void>;
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}
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export type MessageLoader = (
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locale: string,
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namespace?: string,
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) => Promise<TranslationRecord>;
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export type MissingKeyHandler = (info: {
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readonly locale: string;
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readonly namespace: string;
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readonly key: string;
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}) => string | undefined;
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export interface LookupResult {
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readonly value: string | undefined;
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readonly fellBackTo: string | undefined;
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}
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export type NamespacedCatalogMap = Map<string, TranslationRecord>;
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export type TranslationCatalogMap = Map<string, NamespacedCatalogMap>;
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```
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`packages/primitives/types/src/index.ts` adds: `export type * from "./i18n/i18n.types.js";`
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This is a zero-runtime, additive change — every existing consumer continues to work unchanged.
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---
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## 5. Wave 1b — `@suaveplan/i18n-shared` (runtime atoms)
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`@suaveplan/types` cannot hold runtime — constants and the `I18nError` class need a runtime home. New leaf package:
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```text
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packages/i18n/i18n-shared/src/
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constants/
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locale-bcp47-map.ts ← LOCALE_BCP47_MAP
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rtl-locales.ts ← RTL_LOCALES, RTL_LOCALE_LIST
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locale-descriptors.ts ← LOCALE_DESCRIPTORS, DEFAULT_LOCALES, DefaultLocale
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interpolation-defaults.ts ← DEFAULT_INTERPOLATION
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index.ts ← explicit re-exports
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errors/
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i18n-error.ts ← I18nError extends SuaveplanError<I18nErrorCode>
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error-codes.ts ← I18N_CODES via defineCodes (full registry, ~14 codes)
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index.ts
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index.ts ← namespace exports
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index.test.ts
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```
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Dependencies: `@suaveplan/error`, `@suaveplan/types`, `tslib`, `zod` (for any boundary schemas the shared layer needs). Zero deps on other `@suaveplan/i18n*` packages.
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The full `I18N_CODES` registry moves here in one shot — every leaf package throws codes that already exist before any leaf is implemented. This avoids the chicken-and-egg of "which package owns which code."
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---
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## 5b. ICU render `FormatBridge` (small architectural wedge)
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Today `packages/i18n/i18n/src/parser/message/message-render.ts` imports `formatNumber`, `formatCurrency`, `formatDate`, `formatTime` directly to render ICU `{value, number}`, `{amount, number, currency=USD}`, `{date, date, short}` placeholders. That makes the parser depend on the formatters, which would invert Waves 2 and 3.
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The split introduces a tiny DI seam: `i18n-icu-parser` declares a `FormatBridge` interface and the renderer accepts one; if a bridge is not supplied, the renderer returns the raw value coerced to string (no Intl call). Concretely:
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```typescript
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export interface FormatBridge {
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number?(value: number, locale: string, style?: NumberFormatStyle): string;
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currency?(value: number, currency: string, locale: string): string;
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date?(value: Date | number, locale: string, style?: DateStyle): string;
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time?(value: Date | number, locale: string, longForm?: boolean): string;
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relativeTime?(value: number, locale: string, style?: RelativeTimeStyle): string;
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}
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export function renderNodes(
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nodes: readonly MessageNode[],
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values: InterpolationValues,
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locale: string,
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options: RenderOptions & { formatBridge?: FormatBridge },
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): string;
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```
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The slim core (Wave 6) constructs a default `FormatBridge` by importing the formatter packages and passing it to every `renderNodes` call. Consumers who wire `createI18n({...})` get formatters automatically. Consumers who construct a `MessageParser` directly can pass their own bridge or accept the no-Intl fallback.
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This is the only API surface change in the entire split; every other module moves byte-identical.
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Every backend package has the same shape (only `<name>` and the implementation differ):
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```text
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packages/i18n/i18n-backend-<name>/
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package.json ← deps: @suaveplan/i18n-shared, @suaveplan/types,
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@suaveplan/error, @opentelemetry/api,
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(one external if needed: @suaveplan/storage / node:fs)
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src/
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backend.ts ← implements Backend from @suaveplan/types/i18n
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backend.types.ts
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backend.schemas.ts ← Zod for options
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backend.test.ts
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backend.spec-conformance.test.ts
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backend.md
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factory.ts ← <name>Backend(options): Backend factory function
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factory.test.ts
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factory.md
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index.ts ← explicit named re-exports
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README.md
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tsconfig.json ← extends @suaveplan/typescript-config/library.json
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vite.config.ts ← createTestConfig() from @suaveplan/testing/config
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```
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Each backend's `factory.ts` exports a lower-case factory (`memoryBackend`, `httpBackend`, etc.) that returns a `Backend`. The backend class itself (`MemoryBackend`, `HttpBackend`, etc.) is also exported for consumers who want subclassing.
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### 6.1. Tier split rationale
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Four backends are universal tier (`memory`, `http`, `storage`, `chained`). One is server tier (`fs-multifile`) because it uses `node:fs/promises`. The split prevents the universal package surface from accidentally pulling Node-only deps when a browser-tier consumer imports `@suaveplan/i18n-backend-storage`.
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---
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## 7. Formatter package shape (Wave 3 template)
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```text
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packages/i18n/i18n-formatter-<name>/
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package.json ← deps: @suaveplan/i18n-shared, @suaveplan/types,
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@suaveplan/error, @opentelemetry/api, zod
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src/
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formatter.ts ← <Name>Formatter class wrapping Intl.<Name>
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formatter.types.ts
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formatter.schemas.ts ← Zod for options
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formatter.test.ts
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formatter.spec-conformance.test.ts
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formatter.md
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helpers.ts ← format<Name>(value, locale, options?) standalone
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helpers.test.ts
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helpers.md
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index.ts
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README.md
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tsconfig.json
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vite.config.ts
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```
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Each formatter caches its underlying `Intl.<Name>` per `(locale, options-hash)` pair (already proven pattern from current `NumberFormatter`). Each emits an OTel histogram `i18n.format.<name>.duration_ms` and a counter `i18n.format.cache_hit{formatter="<name>"}`.
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### 7.1. Two new formatters
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`Collator` and `Segmenter` are listed in the original `i18n-formatters` change scope but not implemented in the current monolith. The split adds them as their own packages — no monolith bloat, just two new sibling packages.
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---
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## 8. Wave 6 — slim `@suaveplan/i18n` core
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After Waves 1–5 ship, the core package shrinks dramatically. Final shape:
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```text
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packages/i18n/i18n/src/
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catalog/
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catalog.ts ← MessageCatalog, deepMerge
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catalog.types.ts
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catalog.schemas.ts
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catalog.test.ts
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catalog.md
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index.ts
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plugin/
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instance.ts ← createI18n, I18nInstance
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instance.types.ts
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instance.test.ts
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instance.md
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index.ts
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middleware/ ← unchanged from current monolith
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observability/ ← unchanged from current monolith
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utils/
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keys.ts ← flattenRecord, buildKey
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...
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schemas/ ← package-level boundary schemas
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conformance.test.ts ← end-to-end spec conformance (KEEPS PASSING)
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index.ts ← root barrel: re-exports the entire pre-split surface
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```
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Modules that move OUT (and are deleted from `packages/i18n/i18n/src/`):
|
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||||
| Source path (deleted) | New home |
|
||||
|---|---|
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||||
| `src/constants/` | `@suaveplan/i18n-shared` |
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||||
| `src/errors/` | `@suaveplan/i18n-shared` |
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| `src/error-codes.ts` | `@suaveplan/i18n-shared` |
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||||
| `src/parser/` | `@suaveplan/i18n-icu-parser` |
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| `src/core/interpolation/` | `@suaveplan/i18n-icu-parser` |
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||||
| `src/core/pluralization/` | `@suaveplan/i18n-icu-parser` |
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||||
| `src/formatting/number/` | `@suaveplan/i18n-formatter-number` |
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||||
| `src/formatting/relative-time/` | `@suaveplan/i18n-formatter-relative-time` |
|
||||
| `src/formatting/list/` | `@suaveplan/i18n-formatter-list` |
|
||||
| `src/formatting/display-name/` | `@suaveplan/i18n-formatter-display-name` |
|
||||
| `src/formatting/date/` | `@suaveplan/i18n-formatter-date` |
|
||||
| `src/formatting/currency/` | `@suaveplan/i18n-formatter-currency` |
|
||||
| `src/detector/` | `@suaveplan/i18n-detector` |
|
||||
| `src/core/backend/memory/` | `@suaveplan/i18n-backend-memory` |
|
||||
| `src/core/backend/http/` | `@suaveplan/i18n-backend-http` |
|
||||
| `src/core/backend/storage/` | `@suaveplan/i18n-backend-storage` |
|
||||
| `src/core/backend/multi-file-fs/` | `@suaveplan/i18n-backend-fs-multifile` |
|
||||
| `src/core/backend/chained/` | `@suaveplan/i18n-backend-chained` |
|
||||
| `src/core/backend/backend.types.ts` | `@suaveplan/types/i18n` (interface) + `@suaveplan/i18n-shared` (any runtime helpers) |
|
||||
|
||||
Modules that STAY in core: `catalog/`, `plugin/`, `middleware/`, `observability/`, `utils/`, `schemas/`, `conformance.test.ts`, root `index.ts`.
|
||||
|
||||
### 8.1. Back-compat — root barrel re-exports
|
||||
|
||||
The root `packages/i18n/i18n/src/index.ts` becomes a re-export shim that preserves every pre-split import. Concretely:
|
||||
|
||||
```typescript
|
||||
// Constants and errors — re-exported from i18n-shared
|
||||
export {
|
||||
DEFAULT_INTERPOLATION,
|
||||
DEFAULT_LOCALES,
|
||||
LOCALE_BCP47_MAP,
|
||||
LOCALE_DESCRIPTORS,
|
||||
RTL_LOCALE_LIST,
|
||||
RTL_LOCALES,
|
||||
I18N_CODES,
|
||||
I18nError,
|
||||
} from "@suaveplan/i18n-shared";
|
||||
export type { DefaultLocale, I18nErrorCode } from "@suaveplan/i18n-shared";
|
||||
|
||||
// Catalog — stays in core
|
||||
export { MessageCatalog, deepMerge } from "./catalog/catalog.js";
|
||||
export type {
|
||||
CatalogOptions,
|
||||
ExtendedCatalogOptions,
|
||||
LookupResult,
|
||||
MessageLoader,
|
||||
MissingKeyHandler,
|
||||
NamespacedCatalogMap,
|
||||
TranslationCatalogMap,
|
||||
TranslationRecord,
|
||||
} from "@suaveplan/types/i18n";
|
||||
|
||||
// Plugin — stays in core
|
||||
export { createI18n, I18nInstance } from "./plugin/instance.js";
|
||||
export type { I18nInstanceOptions } from "./plugin/instance.js";
|
||||
|
||||
// Parser/interpolation/pluralization — re-exported from i18n-icu-parser
|
||||
export {
|
||||
InterpolationEngine,
|
||||
escapeHtmlChars,
|
||||
escapeRegex,
|
||||
MessageParser,
|
||||
PluralizationEngine,
|
||||
arabicPlural,
|
||||
/* ...full plural rule set... */
|
||||
} from "@suaveplan/i18n-icu-parser";
|
||||
|
||||
// Formatters — re-exported from each i18n-formatter-* package
|
||||
export { NumberFormatter, formatNumber } from "@suaveplan/i18n-formatter-number";
|
||||
export { RelativeTimeFormatter, formatRelativeTime } from "@suaveplan/i18n-formatter-relative-time";
|
||||
export { ListFormatter, formatList } from "@suaveplan/i18n-formatter-list";
|
||||
export { DisplayNameFormatter, formatDisplayName } from "@suaveplan/i18n-formatter-display-name";
|
||||
export { CollatorFormatter, formatCollation } from "@suaveplan/i18n-formatter-collator";
|
||||
export { SegmenterFormatter, formatSegments } from "@suaveplan/i18n-formatter-segmenter";
|
||||
export { DateFormatter, formatDate } from "@suaveplan/i18n-formatter-date";
|
||||
export { CurrencyFormatter, formatCurrency } from "@suaveplan/i18n-formatter-currency";
|
||||
|
||||
// Detector — re-exported from i18n-detector
|
||||
export { createDetectorChain, getTextDirection } from "@suaveplan/i18n-detector";
|
||||
export type { DetectorContext, LocaleDetector } from "@suaveplan/i18n-detector";
|
||||
|
||||
// Backends — re-exported from i18n-backend-* packages
|
||||
export { MemoryBackend, memoryBackend } from "@suaveplan/i18n-backend-memory";
|
||||
export { HttpBackend, httpBackend } from "@suaveplan/i18n-backend-http";
|
||||
export { StorageBackend, storageBackend } from "@suaveplan/i18n-backend-storage";
|
||||
export { ChainedBackend, chainedBackend } from "@suaveplan/i18n-backend-chained";
|
||||
// (fs-multifile NOT re-exported from universal root — server-tier consumers import directly)
|
||||
```
|
||||
|
||||
Subpath exports also preserved — `@suaveplan/i18n/detector`, `@suaveplan/i18n/plugin`, `@suaveplan/i18n/parser`, `@suaveplan/i18n/errors` continue to resolve, internally forwarding to the relevant new package.
|
||||
|
||||
### 8.2. Verification
|
||||
|
||||
The existing `packages/i18n/i18n/src/conformance.test.ts` is the contract gate. After the slim, **every assertion in that file MUST still pass** — that is the regression bar for the back-compat layer.
|
||||
|
||||
Downstream consumers verified:
|
||||
|
||||
- `packages/react/react-i18n/` — 17 distinct imports from `@suaveplan/i18n` (root + subpaths). Re-export bridge covers all of them.
|
||||
- `packages/react/react-ui/` — uses `@suaveplan/i18n` for translation key types and missing-key flow. Bridge covers.
|
||||
- `packages/react/react-forms/` — uses `@suaveplan/i18n` for validation message catalog. Bridge covers.
|
||||
|
||||
---
|
||||
|
||||
## 9. Wave-by-wave execution plan
|
||||
|
||||
Crash-safety principle: **every wave commits before the next starts.** Waves 1–5 are pure additions to `packages/i18n/` — they never touch `packages/i18n/i18n/src/`. Only Wave 6 deletes from the monolith. If a session dies mid-Wave-6, the leaf packages (Waves 1–5) are already on disk and the monolith is recoverable from `git`.
|
||||
|
||||
### Wave 1 — Foundation
|
||||
|
||||
| Step | Artifact | Gate |
|
||||
|---|---|---|
|
||||
| 1.1 | `@suaveplan/types/i18n/i18n.types.ts` (zero runtime additions) | `bunx turbo typecheck --filter=@suaveplan/types` green |
|
||||
| 1.2 | `@suaveplan/i18n-shared` package scaffold + constants + errors + error codes | 5-gate triple green; 100/100/100/100 cov |
|
||||
| 1.3 | Commit: `feat(i18n): foundation — types/i18n + i18n-shared (Wave 1)` | — |
|
||||
|
||||
### Wave 2 — ICU parser
|
||||
|
||||
| Step | Artifact | Gate |
|
||||
|---|---|---|
|
||||
| 2.1 | `@suaveplan/i18n-icu-parser` scaffold | — |
|
||||
| 2.2 | Move `parser/`, `core/interpolation/`, `core/pluralization/` source + tests + docs into the new package; rewrite imports to `@suaveplan/i18n-shared` | 5-gate triple green; 100/100/100/100 cov |
|
||||
| 2.3 | Commit: `feat(i18n): icu-parser package (Wave 2)` | — |
|
||||
|
||||
Note: the source is *copied*, not *moved*, in Wave 2. The monolith retains its copy until Wave 6 deletes it. This keeps the monolith green throughout Waves 2–5.
|
||||
|
||||
### Wave 3 — Formatters (8 packages, fully parallel)
|
||||
|
||||
| Step | Artifact | Gate |
|
||||
|---|---|---|
|
||||
| 3.1 | 8 formatter package scaffolds (parallel agent dispatch) | — |
|
||||
| 3.2 | Copy each `formatting/<name>/` → its package; add Collator + Segmenter from scratch | 5-gate triple green per package; 100/100/100/100 cov each |
|
||||
| 3.3 | Commit: `feat(i18n): 8 formatter packages (Wave 3)` | — |
|
||||
|
||||
### Wave 4 — Detector
|
||||
|
||||
| Step | Artifact | Gate |
|
||||
|---|---|---|
|
||||
| 4.1 | `@suaveplan/i18n-detector` scaffold | — |
|
||||
| 4.2 | Copy `detector/` → new package; rewire deps to `@suaveplan/i18n-shared` + `@suaveplan/locale-data` | 5-gate triple green; 100/100/100/100 cov |
|
||||
| 4.3 | Commit: `feat(i18n): detector package (Wave 4)` | — |
|
||||
|
||||
### Wave 5 — Backends (5 packages, fully parallel)
|
||||
|
||||
| Step | Artifact | Gate |
|
||||
|---|---|---|
|
||||
| 5.1 | 5 backend package scaffolds (parallel agent dispatch) | — |
|
||||
| 5.2 | Copy each `core/backend/<name>/` → its package; rewire to `Backend` from `@suaveplan/types/i18n` | 5-gate triple green per package; 100/100/100/100 cov each |
|
||||
| 5.3 | Commit: `feat(i18n): 5 backend packages (Wave 5)` | — |
|
||||
|
||||
### Wave 6 — Slim core (RISKY)
|
||||
|
||||
| Step | Artifact | Gate |
|
||||
|---|---|---|
|
||||
| 6.1 | Add Wave 1–5 packages as `workspace:^` deps in `packages/i18n/i18n/package.json` | — |
|
||||
| 6.2 | Rewrite `packages/i18n/i18n/src/index.ts` to re-export from new packages (per §8.1) | `bunx turbo typecheck --filter=@suaveplan/i18n` green |
|
||||
| 6.3 | Verify downstream consumers (`react-i18n`, `react-ui`, `react-forms`) still typecheck and test green | `bunx turbo lint typecheck test --filter='@suaveplan/react-*'` green |
|
||||
| 6.4 | Verify `conformance.test.ts` still passes against re-exported surface | `bunx turbo test --filter=@suaveplan/i18n` — all 745 tests green |
|
||||
| 6.5 | Delete moved-out source from monolith (per §8 table) | `bunx turbo lint typecheck test --filter=@suaveplan/i18n` green; coverage 100/100/100/100 on remaining slim core |
|
||||
| 6.6 | Refresh `MANIFEST.md` (`bun scripts/folder-reorg/generate-manifest.ts`) | — |
|
||||
| 6.7 | Update `CLAUDE.md` package listing | — |
|
||||
| 6.8 | Archive all 14 change folders + this design doc to `openspec/archive/2026-05-05-i18n-modular-split-*/` | — |
|
||||
| 6.9 | Commit: `feat(i18n): slim core + complete modular split (Wave 6)` | — |
|
||||
|
||||
---
|
||||
|
||||
## 10. Risk register
|
||||
|
||||
| Risk | Likelihood | Impact | Mitigation |
|
||||
|---|---|---|---|
|
||||
| Re-export bridge misses an import path | Medium | Downstream consumers break | §8.1 lists every observed downstream import; conformance test + downstream typecheck in Wave 6.3 catches gaps |
|
||||
| Subpath export forwarding loses tree-shaking | Low | Bundle size regression in `react-i18n` consumers | Keep per-package subpath exports (`@suaveplan/i18n-formatter-number/formatter`) so direct importers bypass the bridge |
|
||||
| Plural-rule tests in icu-parser drift from monolith copy | Low | Spec conformance fails | Copy verbatim; plural rules are pure functions; same `it(...)` titles |
|
||||
| Storage backend tests need real `@suaveplan/storage` MemoryStorage | Low | Test infra | Already working in monolith; same pattern |
|
||||
| Wave 6 deletion takes monolith below 100% cov | Medium | Pre-publish gate fails | Delete in surgical commits; run `bunx turbo test:coverage` after each delete batch; restore via `git checkout` if cov drops |
|
||||
| Session crash during Wave 6 leaves monolith in half-deleted state | Low (but the user explicitly flagged it) | Branch needs `git restore` | Waves 1–5 already committed = leaf packages survive; `git restore packages/i18n/i18n/src/` brings the monolith back |
|
||||
| OpenSpec change folder authoring takes longer than implementation | Medium | Pre-implementation effort sunk | Acceptable — folders are durable artifacts; even a crashed session leaves them on disk for the next session to pick up |
|
||||
|
||||
---
|
||||
|
||||
## 11. Out of scope
|
||||
|
||||
- **No API changes.** Every public symbol keeps its name and signature. The only observable change for consumers is they *can* now import from the per-package paths if they want narrower trees.
|
||||
- **No new functionality** beyond `Collator` and `Segmenter` formatters (which were in the original `i18n-formatters` change scope).
|
||||
- **No `@suaveplan/react-i18n` changes.** It stays on the slim core's re-export surface; a follow-up change can migrate it to direct per-package imports for tree-shaking.
|
||||
- **No `@suaveplan/locale-data` split.** It is already a separate package and has no need to grow further.
|
||||
- **No registry/distribution changes.** Verdaccio publication is unchanged; each new package publishes independently.
|
||||
|
||||
---
|
||||
|
||||
## 12. Verification matrix
|
||||
|
||||
For every wave, the following gates are mandatory before commit:
|
||||
|
||||
```bash
|
||||
# Per-package gates (run for each new/touched package)
|
||||
bun run check # Biome 0/0/0
|
||||
bunx turbo lint typecheck test --filter=@suaveplan/<pkg> # green
|
||||
bunx turbo test:coverage --filter=@suaveplan/<pkg> # 100/100/100/100
|
||||
bun scripts/openspec-conformance.ts @suaveplan/<pkg> # exit 0
|
||||
bunx turbo build --filter=@suaveplan/<pkg> # green
|
||||
|
||||
# Wave 6 additional cross-package gate
|
||||
bunx turbo lint typecheck test --filter='@suaveplan/react-*' # downstream stays green
|
||||
bunx turbo build --filter='@suaveplan/i18n*' # entire i18n family builds
|
||||
```
|
||||
|
||||
The OpenSpec conformance gate runs against each new package's spec delta; the `**Verified by:**` lines are checked for existence of the named test cases.
|
||||
|
||||
---
|
||||
|
||||
## 13. Authoring sequence for OpenSpec change folders
|
||||
|
||||
The following 14 change folders will be created in `openspec/changes/`:
|
||||
|
||||
```text
|
||||
openspec/changes/
|
||||
i18n-types-extension/ ← Wave 1a (zero-runtime types in @suaveplan/types/i18n)
|
||||
i18n-shared/ ← Wave 1b
|
||||
i18n-icu-parser/ ← Wave 2
|
||||
i18n-formatter-number/ ← Wave 3
|
||||
i18n-formatter-relative-time/ ← Wave 3
|
||||
i18n-formatter-list/ ← Wave 3
|
||||
i18n-formatter-display-name/ ← Wave 3
|
||||
i18n-formatter-collator/ ← Wave 3
|
||||
i18n-formatter-segmenter/ ← Wave 3
|
||||
i18n-formatter-date/ ← Wave 3
|
||||
i18n-formatter-currency/ ← Wave 3
|
||||
i18n-detector/ ← Wave 4
|
||||
i18n-backend-memory/ ← Wave 5
|
||||
i18n-backend-http/ ← Wave 5
|
||||
i18n-backend-storage/ ← Wave 5
|
||||
i18n-backend-fs-multifile/ ← Wave 5
|
||||
i18n-backend-chained/ ← Wave 5
|
||||
i18n-core-slim/ ← Wave 6
|
||||
```
|
||||
|
||||
(That is actually 18 folders, not 14 — the design doc text in §1.2 lists 14 *new* packages plus the slim core; the change-folder count includes the types extension and the core slim as separate OpenSpec changes.)
|
||||
|
||||
Each folder contains:
|
||||
|
||||
- `proposal.md` — Why / What changes / Out of scope / Source mapping / Verification approach / Impact
|
||||
- `tasks.md` — numbered checklist following the Wave 1–5 template (spec authoring → scaffold → implementation → tests → documentation → 5-gate triple → 7-row checklist → archive)
|
||||
- `specs/<capability>/spec.md` — ADDED Requirements with `**Verified by:**` lines per AGENTS.md §13
|
||||
|
||||
Each folder is a durable artifact: even if a future session crashes mid-implementation, the next session can pick up from the tasks.md checklist with full context.
|
||||
|
||||
---
|
||||
|
||||
## 14. References
|
||||
|
||||
- `openspec/AGENTS.md` — gate compliance checklist
|
||||
- `openspec/cross-cutting-designs/2026-05-05-react-ui-react-i18n-react-forms.md` — pattern reference for cross-cutting designs
|
||||
- `openspec/changes/archive/2026-05-04-i18n-formatters/` — pattern reference for proposal/tasks/spec-delta shape
|
||||
- `packages/i18n/i18n/CLAUDE.md` (root) — current monolith inventory
|
||||
- `packages/primitives/types/src/index.ts` — current `@suaveplan/types` surface (Wave 1a extends this)
|
||||
186
openspec/archive/2026-05-09-i18n-core-slim/proposal.md
Normal file
186
openspec/archive/2026-05-09-i18n-core-slim/proposal.md
Normal file
@@ -0,0 +1,186 @@
|
||||
# `@suaveplan/i18n` core slim — Wave 6 (destructive)
|
||||
|
||||
**Package**: `@suaveplan/i18n` (REWRITE — slim down)
|
||||
**Status**: PROPOSED
|
||||
**Type**: refactor (destructive — deletes ~70% of monolith source; full back-compat preserved via root barrel)
|
||||
**Date**: 2026-05-05
|
||||
**Wave**: 6 (LAST — depends on Waves 1–5 having shipped and committed)
|
||||
**Design doc**: `openspec/cross-cutting-designs/2026-05-05-i18n-modular-split.md` (especially §8)
|
||||
**Path**: `packages/i18n/i18n/`
|
||||
|
||||
## Why
|
||||
|
||||
Waves 1–5 ship every leaf package the modular split needs: foundation (`@suaveplan/types/i18n` + `@suaveplan/i18n-shared`), parser (`@suaveplan/i18n-icu-parser`), 8 formatter packages, 1 detector package, 5 backend packages. With those landed, the `@suaveplan/i18n` monolith becomes the *integration layer*: it owns only the catalog, the plugin slot (`createI18n` / `I18nInstance`), middleware, observability state, locale negotiation/resolver, the schemas, the keys utils, the missing-key flow, and the conformance test. Every other module has a new home — keeping the duplicate copies in the monolith creates a single-source-of-truth violation and undermines the per-package coverage gate.
|
||||
|
||||
This change deletes the moved-out modules, adds Waves 1–5 as workspace deps, and rewrites the root barrel so every public symbol that existed pre-split continues to resolve via re-export. The 745 existing tests in `packages/i18n/i18n/src/conformance.test.ts` and the 17 distinct downstream import paths from `@suaveplan/react-i18n` / `react-ui` / `react-forms` are the contract gates: every one must remain green after the slim. This is the only wave that touches `packages/i18n/i18n/src/` destructively, and the only wave that can break downstream consumers — which is why it ships last, after every leaf package is on disk and committed.
|
||||
|
||||
## What changes
|
||||
|
||||
### `@suaveplan/i18n` (rewrite)
|
||||
|
||||
- ADDED: workspace-dep entries in `packages/i18n/i18n/package.json` `dependencies`:
|
||||
- `@suaveplan/i18n-shared workspace:^`
|
||||
- `@suaveplan/i18n-icu-parser workspace:^`
|
||||
- `@suaveplan/i18n-formatter-number workspace:^`
|
||||
- `@suaveplan/i18n-formatter-relative-time workspace:^`
|
||||
- `@suaveplan/i18n-formatter-list workspace:^`
|
||||
- `@suaveplan/i18n-formatter-display-name workspace:^`
|
||||
- `@suaveplan/i18n-formatter-collator workspace:^`
|
||||
- `@suaveplan/i18n-formatter-segmenter workspace:^`
|
||||
- `@suaveplan/i18n-formatter-date workspace:^`
|
||||
- `@suaveplan/i18n-formatter-currency workspace:^`
|
||||
- `@suaveplan/i18n-detector workspace:^`
|
||||
- `@suaveplan/i18n-backend-memory workspace:^`
|
||||
- `@suaveplan/i18n-backend-http workspace:^`
|
||||
- `@suaveplan/i18n-backend-storage workspace:^`
|
||||
- `@suaveplan/i18n-backend-chained workspace:^`
|
||||
- (`@suaveplan/i18n-backend-fs-multifile workspace:^` is **NOT** added to universal-tier deps; it is server-tier and consumers import it directly. The slim core MAY add it as an optionalPeerDependency for documentation purposes.)
|
||||
- REWRITTEN: `packages/i18n/i18n/src/index.ts` — root barrel becomes a re-export shim. Every one of the 33 export statements in the current 211-line barrel is preserved; the *source* of each export changes from local paths to the new packages. See "Back-compat re-export map" below for the exhaustive table.
|
||||
- ADDED: `packages/i18n/i18n/src/parser/format-bridge-default.ts` — wires up a default `FormatBridge` (from `@suaveplan/i18n-icu-parser/parser/format-bridge`) by importing the formatter packages and binding their `format<Name>` functions. This bridge is passed to every `MessageParser.render` call inside `MessageCatalog` and `I18nInstance`. Consumers that construct `createI18n(...)` get formatters auto-wired; advanced consumers can pass `{ formatBridge: customBridge }` to `createI18n` to override.
|
||||
- MODIFIED: `packages/i18n/i18n/src/core/catalog/catalog.ts` and `core/plugin/instance.ts` — pass the default `FormatBridge` through every `renderNodes` call. No public API change; both classes already accept a `RenderOptions` shape; the bridge slot is added to that shape.
|
||||
|
||||
### Files DELETED from `packages/i18n/i18n/src/`
|
||||
|
||||
The following directories and files are deleted because every symbol they export is now sourced from a new package:
|
||||
|
||||
| Deleted path | New home (re-exported from) |
|
||||
|---|---|
|
||||
| `src/constants/` (entire directory) | `@suaveplan/i18n-shared/constants` |
|
||||
| `src/error-codes.ts` | `@suaveplan/i18n-shared/errors` |
|
||||
| `src/errors/` (entire directory) | `@suaveplan/i18n-shared/errors` |
|
||||
| `src/parser/` (entire directory) | `@suaveplan/i18n-icu-parser/parser` |
|
||||
| `src/core/interpolation/` (entire directory) | `@suaveplan/i18n-icu-parser/interpolation` |
|
||||
| `src/core/pluralization/` (entire directory) | `@suaveplan/i18n-icu-parser/pluralization` |
|
||||
| `src/formatting/number/` | `@suaveplan/i18n-formatter-number` |
|
||||
| `src/formatting/relative-time/` | `@suaveplan/i18n-formatter-relative-time` |
|
||||
| `src/formatting/list/` | `@suaveplan/i18n-formatter-list` |
|
||||
| `src/formatting/display-name/` | `@suaveplan/i18n-formatter-display-name` |
|
||||
| `src/formatting/date/` | `@suaveplan/i18n-formatter-date` |
|
||||
| `src/formatting/currency/` | `@suaveplan/i18n-formatter-currency` |
|
||||
| `src/formatting/index.ts` | (deleted; root barrel re-exports per-formatter) |
|
||||
| `src/detector/` (entire directory) | `@suaveplan/i18n-detector` |
|
||||
| `src/core/backend/` (entire directory) | `@suaveplan/i18n-backend-*` |
|
||||
|
||||
Files that **stay** in `packages/i18n/i18n/src/`:
|
||||
|
||||
| Path | Role |
|
||||
|---|---|
|
||||
| `src/core/catalog/` | `MessageCatalog`, `deepMerge` — stays as the integration layer |
|
||||
| `src/core/plugin/` | `createI18n`, `I18nInstance` — stays as the public top-level API |
|
||||
| `src/locale/negotiation/` | `negotiateLocale`, `parseAcceptLanguage` — RFC 4647 lookup, foundational locale primitives |
|
||||
| `src/locale/resolver/` | `LocaleResolver`, `extractLanguage`, `extractRegion`, `normalizeLocaleCode` — strategy-based resolver |
|
||||
| `src/middleware/` | `createLocaleMiddleware`, `detectLocale`, `getDirection` server middleware |
|
||||
| `src/observability/` | detector-metrics state, OTel adapters |
|
||||
| `src/schemas/` | `CatalogOptionsSchema`, `InterpolationConfigSchema`, `ResolverConfigSchema`, `TranslationRecordSchema` — boundary validation |
|
||||
| `src/utils/` | `buildKey`, `countKeys`, `flattenRecord`, `getNestedValue`, `getTextDirection`, `hasKey`, `isRtl`, `parseKey`, `sanitize`, `unflattenRecord` — key/translation utilities |
|
||||
| `src/conformance.test.ts` | end-to-end spec conformance — REGRESSION GATE |
|
||||
| `src/index.ts` | rewritten root barrel (back-compat) |
|
||||
| `src/index.test.ts` | exhaustive symbol-existence test |
|
||||
|
||||
### Subpath exports preserved
|
||||
|
||||
Every existing `package.json` `exports` subpath continues to resolve. Internally the subpath forwards to the relevant new package. Documented subpaths:
|
||||
|
||||
- `@suaveplan/i18n` — root barrel
|
||||
- `@suaveplan/i18n/detector` — forwards to `@suaveplan/i18n-detector`
|
||||
- `@suaveplan/i18n/plugin` — forwards to local `core/plugin/instance.ts`
|
||||
- `@suaveplan/i18n/parser` — forwards to `@suaveplan/i18n-icu-parser/parser`
|
||||
- `@suaveplan/i18n/errors` — forwards to `@suaveplan/i18n-shared/errors`
|
||||
|
||||
## Back-compat re-export map (exhaustive)
|
||||
|
||||
Every `export` in the current `src/index.ts` (211 lines, 33 export statements). Each row says: pre-split source → new source.
|
||||
|
||||
| Symbol | Pre-split source | Post-split source |
|
||||
|---|---|---|
|
||||
| `DefaultLocale` (type) | `./constants/index.js` | `@suaveplan/i18n-shared/constants/locale-descriptors` |
|
||||
| `DEFAULT_INTERPOLATION` | `./constants/index.js` | `@suaveplan/i18n-shared/constants/interpolation-defaults` |
|
||||
| `DEFAULT_LOCALES` | `./constants/index.js` | `@suaveplan/i18n-shared/constants/locale-descriptors` |
|
||||
| `LOCALE_BCP47_MAP` | `./constants/index.js` | `@suaveplan/i18n-shared/constants/locale-bcp47-map` |
|
||||
| `LOCALE_DESCRIPTORS` | `./constants/index.js` | `@suaveplan/i18n-shared/constants/locale-descriptors` |
|
||||
| `RTL_LOCALE_LIST` | `./constants/index.js` | `@suaveplan/i18n-shared/constants/rtl-locales` |
|
||||
| `RTL_LOCALES` | `./constants/index.js` | `@suaveplan/i18n-shared/constants/rtl-locales` |
|
||||
| `deepMerge`, `MessageCatalog` | `./core/catalog/catalog.js` | (stays — local) |
|
||||
| `CatalogOptions`, `ExtendedCatalogOptions` (types) | `./core/catalog/catalog.types.js` | (stays — local) |
|
||||
| `LookupResult`, `MessageLoader`, `MissingKeyHandler`, `NamespacedCatalogMap`, `TranslationCatalogMap`, `TranslationRecord` (types) | `./core/catalog/catalog.types.js` | `@suaveplan/types` (Wave 1a) |
|
||||
| `escapeHtmlChars`, `escapeRegex`, `InterpolationEngine` | `./core/interpolation/interpolation.js` | `@suaveplan/i18n-icu-parser/interpolation` |
|
||||
| `InterpolationConfig`, `InterpolationOptions`, `InterpolationResult`, `InterpolationValues`, `ValueFormatter` (types) | `./core/interpolation/interpolation.types.js` | `@suaveplan/i18n-icu-parser/interpolation` |
|
||||
| `I18nInstanceOptions` (type) | `./core/plugin/instance.js` | (stays — local) |
|
||||
| `createI18n`, `I18nInstance` | `./core/plugin/instance.js` | (stays — local; modified to wire default FormatBridge) |
|
||||
| `arabicPlural`, `chinesePlural`, `defaultPluralRule`, `englishPlural`, `frenchPlural`, `germanPlural`, `getBaseLocale`, `normalizeLocale`, `PluralizationEngine`, `polishPlural`, `russianPlural`, `spanishPlural`, `welshPlural` | `./core/pluralization/pluralization.js` | `@suaveplan/i18n-icu-parser/pluralization` |
|
||||
| `PluralCategory`, `PluralMessages`, `PluralResolveOptions`, `PluralResolveResult`, `PluralRuleFunction`, `PluralRuleRegistry` (types) | `./core/pluralization/pluralization.types.js` | `@suaveplan/i18n-icu-parser/pluralization` |
|
||||
| `DetectorChain`, `DetectorChainResult`, `DetectorChainUnresolved`, `DetectorContext`, `DetectorEnvironment`, `DetectorStorageLike`, `LocaleDetector` (types) | `./detector/index.js` | `@suaveplan/i18n-detector` |
|
||||
| `createDetectorChain`, `DETECTOR_CHAIN_UNRESOLVED` | `./detector/index.js` | `@suaveplan/i18n-detector` |
|
||||
| `I18nCode` (type) | `./error-codes.js` | `@suaveplan/i18n-shared/errors` (renamed: `I18nErrorCode` is the new name; `I18nCode` is re-exported as a type alias for back-compat) |
|
||||
| `I18N_CODES` | `./error-codes.js` | `@suaveplan/i18n-shared/errors` |
|
||||
| `I18nError` | `./errors/i18n-error.js` | `@suaveplan/i18n-shared/errors` |
|
||||
| `formatCurrency`, `formatCurrencyValue`, `getCurrencyInfo`, `getCurrencyName`, `getCurrencySymbol` | `./formatting/currency/currency.js` | `@suaveplan/i18n-formatter-currency` |
|
||||
| `CommonCurrency`, `CurrencyFormatOptions`, `CurrencyInfo` (types) | `./formatting/currency/currency.types.js` | `@suaveplan/i18n-formatter-currency` |
|
||||
| `formatDate`, `formatDateOnly`, `formatDateRange`, `formatTime`, `getDayNames`, `getMonthNames` | `./formatting/date/date.js` | `@suaveplan/i18n-formatter-date` |
|
||||
| `DateFormatOptions`, `DateFormatPreset`, `ExtendedDateOptions` (types) | `./formatting/date/date.types.js` | `@suaveplan/i18n-formatter-date` |
|
||||
| `negotiateLocale`, `parseAcceptLanguage` | `./locale/negotiation/negotiation.js` | (stays — local) |
|
||||
| `AcceptLanguageEntry`, `NegotiationOptions`, `NegotiationResult` (types) | `./locale/negotiation/negotiation.types.js` | (stays — local) |
|
||||
| `extractLanguage`, `extractRegion`, `LocaleResolver`, `normalizeLocaleCode` | `./locale/resolver/resolver.js` | (stays — local) |
|
||||
| `ExtendedResolverConfig`, `ResolutionStrategy`, `ResolvedLocale`, `ResolverConfig` (types) | `./locale/resolver/resolver.types.js` | (stays — local) |
|
||||
| `createLocaleMiddleware`, `detectLocale`, `getDirection` | `./middleware/server/server.js` | (stays — local) |
|
||||
| `ExtendedMiddlewareConfig`, `I18nRequest`, `LocaleLookupSource`, `MiddlewareConfig`, `MiddlewareResult`, `TextDirection` (types) | `./middleware/server/server.types.js` | (stays — local) |
|
||||
| `DetectorMetricSample`, `DetectorMetricsState` (types) | `./observability/detector-metrics.js` | (stays — local) |
|
||||
| `getDetectorMetrics`, `getDetectorMetricsState`, `recordDetectorDuration`, `recordDetectorMatch`, `resetDetectorMetricsCache`, `resetDetectorMetricsState` | `./observability/detector-metrics.js` | (stays — local) |
|
||||
| `extractVariables`, `MessageParser`, `renderNodes` | `./parser/message/message.js` | `@suaveplan/i18n-icu-parser/parser` |
|
||||
| `MessageNode`, `ParsedMessage`, `ParserOptions`, `PluralNode`, `SelectNode`, `TextNode`, `VariableNode` (types) | `./parser/message/message.types.js` | `@suaveplan/i18n-icu-parser/parser` |
|
||||
| `CatalogOptionsInput`, `InterpolationConfigInput`, `ResolverConfigInput` (types) | `./schemas/i18n.schemas.js` | (stays — local) |
|
||||
| `CatalogOptionsSchema`, `InterpolationConfigSchema`, `ResolverConfigSchema`, `TranslationRecordSchema` | `./schemas/i18n.schemas.js` | (stays — local) |
|
||||
| `buildKey`, `countKeys`, `flattenRecord`, `getNestedValue`, `getTextDirection`, `hasKey`, `isRtl`, `parseKey`, `sanitize`, `unflattenRecord` | `./utils/utils.js` | (stays — local) |
|
||||
| `KeyPathResult`, `SanitizeOptions` (types) | `./utils/utils.types.js` | (stays — local) |
|
||||
|
||||
Backend factories (`MemoryBackend`, `memoryBackend`, `HttpBackend`, `httpBackend`, `StorageBackend`, `storageBackend`, `ChainedBackend`, `chainedBackend`) are **added** to the root barrel even though they are not in the current 211-line `index.ts` — they were exported via the `./core/backend/*` subpaths, and the slim core re-exports them at the root for parity with formatters and detector. `MultiFileFsBackend` / `multiFileFsBackend` are **NOT** added to the universal-tier root because the package is server-tier; consumers must import directly from `@suaveplan/i18n-backend-fs-multifile`.
|
||||
|
||||
## Out of scope
|
||||
|
||||
- **Migrating downstream consumers** (`@suaveplan/react-i18n`, `react-ui`, `react-forms`) to direct per-package imports for tree-shaking — follow-up change. They keep working through the slim root barrel.
|
||||
- **Removing the `./detector` / `./plugin` / `./parser` / `./errors` subpaths** from `package.json` `exports` — kept indefinitely for back-compat.
|
||||
- **Renaming `I18nCode` → `I18nErrorCode`** as a breaking change — the new name is exported from `@suaveplan/i18n-shared`; the old name is kept as a type alias.
|
||||
- **Splitting `locale/` into its own `i18n-locale-resolver` package** — possible future change; out of scope here.
|
||||
- **Splitting `middleware/server/` into a separate `i18n-middleware` package** — possible future change; out of scope here.
|
||||
|
||||
## Source mapping
|
||||
|
||||
This change is mostly *deletion* and *re-export*. The "source" for the back-compat barrel is the existing `packages/i18n/i18n/src/index.ts` (lines 1–211). For the bridge wiring:
|
||||
|
||||
| Requirement | Source file | Source lines | Notes |
|
||||
|---|---|---|---|
|
||||
| Default FormatBridge wiring | `packages/i18n/i18n/src/parser/message/message-render.ts` | full file | Today's direct formatter calls become `formatBridge.<name>(...)` calls in Wave 2's `i18n-icu-parser`. The default bridge constructed in Wave 6 calls back into the current monolith's formatter functions (post-move: now in formatter packages). |
|
||||
| Catalog FormatBridge plumbing | `packages/i18n/i18n/src/core/catalog/catalog.ts` | every `renderNodes(...)` call site | Add `formatBridge` to `RenderOptions` |
|
||||
| Plugin FormatBridge plumbing | `packages/i18n/i18n/src/core/plugin/instance.ts` | every `renderNodes(...)` call site | Same |
|
||||
|
||||
### Requirements with no source line
|
||||
|
||||
| Requirement | Justification |
|
||||
|---|---|
|
||||
| Slim-core root barrel | New shape; the export *symbols* match the existing barrel byte-for-byte but the *sources* change |
|
||||
| Default FormatBridge factory in `parser/format-bridge-default.ts` | New file — needed because formatter packages now live outside the parser package |
|
||||
| Backend re-exports in root barrel | New symbols at root; previously only accessible via `./core/backend/*` subpaths. Adding them at root improves discoverability and matches formatter parity |
|
||||
|
||||
## Verification approach
|
||||
|
||||
This is the highest-risk change in the entire split. Verification is layered:
|
||||
|
||||
1. **`packages/i18n/i18n/src/conformance.test.ts`** — every existing test must remain green. This file tests the public surface end-to-end against real values; it is the strongest regression gate.
|
||||
2. **`packages/i18n/i18n/src/index.test.ts`** — exhaustive symbol-existence test. Every one of the 33 exports + every backend re-export must resolve. Test enumerates the symbol list; failure means the back-compat barrel missed a symbol.
|
||||
3. **`packages/react/react-i18n/`** test suite — unchanged code, must remain green. 17 distinct import paths from `@suaveplan/i18n` (root + 4 subpaths) cover the most heavily-used downstream surface.
|
||||
4. **`packages/react/react-ui/`** test suite — must remain green.
|
||||
5. **`packages/react/react-forms/`** test suite — must remain green.
|
||||
6. **Per-package coverage** — `bunx turbo test:coverage --filter=@suaveplan/i18n` must hit 100/100/100/100 on the slim core (the moved-out modules are no longer counted; the slim core's coverage focuses on catalog, plugin, locale, middleware, observability, schemas, utils, and the new bridge wiring).
|
||||
7. **Subpath resolution** — a test that imports from each documented subpath (`@suaveplan/i18n/detector`, `@suaveplan/i18n/plugin`, `@suaveplan/i18n/parser`, `@suaveplan/i18n/errors`) and asserts the expected symbols resolve.
|
||||
8. **Bundle-size sanity** — record the slim core's bundle size before and after. Expect a meaningful reduction (formatters / parser / backends were a large fraction of the monolith); document the new size in the README.
|
||||
|
||||
## Impact
|
||||
|
||||
- `@suaveplan/i18n` shrinks from ~121 source files to ~25 (catalog + plugin + locale + middleware + observability + utils + schemas + conformance + bridge + barrel + tests).
|
||||
- `@suaveplan/i18n` gains 15 new `workspace:^` deps (Waves 1–5 packages).
|
||||
- `@suaveplan/i18n` adds backend factories to its root barrel (4 universal-tier backends).
|
||||
- Every existing `import { X } from "@suaveplan/i18n"` continues to work — zero downstream breakage expected.
|
||||
- `MANIFEST.md` regenerated; `CLAUDE.md` listing for `@suaveplan/i18n` updated to reflect slim scope.
|
||||
- All 14 OpenSpec change folders for the modular split (`i18n-types-extension`, `i18n-shared`, `i18n-icu-parser`, 8 formatters, `i18n-detector`, 5 backends, this folder) archive together to `openspec/archive/2026-05-05-i18n-modular-split-*/`.
|
||||
- The cross-cutting design doc at `openspec/cross-cutting-designs/2026-05-05-i18n-modular-split.md` moves to the archive folder for the design (kept as a single design doc for the entire split, archived once on Wave 6 completion).
|
||||
- This wave is the **only** crash-unsafe step in the entire split. If a session dies between deleting source and rewriting the barrel, the working tree is in a broken state. Mitigation: each deletion in §"Files DELETED" is its own commit (sub-commit within Wave 6); the barrel rewrite happens *first*, so even at the worst crash point the package still builds (it just has duplicate definitions until the deletes finish).
|
||||
240
openspec/archive/2026-05-09-i18n-core-slim/specs/i18n/spec.md
Normal file
240
openspec/archive/2026-05-09-i18n-core-slim/specs/i18n/spec.md
Normal file
@@ -0,0 +1,240 @@
|
||||
<!-- markdownlint-disable MD024 -->
|
||||
|
||||
# Capability Spec Delta: i18n (i18n-core-slim, Wave 6)
|
||||
|
||||
**Package**: `@suaveplan/i18n`
|
||||
**Status**: PROPOSED
|
||||
|
||||
> Every requirement below carries a `**Verified by:**` line at authoring time. (See `openspec/AGENTS.md` Section 13.)
|
||||
|
||||
## REMOVED Requirements
|
||||
|
||||
The following requirements MOVE to sibling packages. The capability still holds at the family level but is no longer hosted by this package directly. Each removal carries a `**Now hosted by:**` pointer so the conformance gate can find the new home.
|
||||
|
||||
### Requirement: BCP-47 locale tag map exposed by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** The `LOCALE_BCP47_MAP` constant is no longer hosted by `@suaveplan/i18n` directly; it is re-exported from `@suaveplan/i18n-shared/constants/locale-bcp47-map` via the back-compat root barrel.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-shared` (capability spec: `openspec/specs/i18n-shared/spec.md`)
|
||||
|
||||
---
|
||||
|
||||
### Requirement: RTL locale set exposed by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** The `RTL_LOCALES` and `RTL_LOCALE_LIST` constants move to `@suaveplan/i18n-shared`. Re-exported via root barrel for back-compat.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-shared`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Locale descriptors exposed by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** `LOCALE_DESCRIPTORS`, `DEFAULT_LOCALES`, `DefaultLocale` move to `@suaveplan/i18n-shared`.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-shared`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: I18N error code registry hosted by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** `I18N_CODES`, `I18nError`, `I18nErrorCode` (formerly `I18nCode`) move to `@suaveplan/i18n-shared`. Re-exported via root barrel for back-compat. The legacy `I18nCode` name is preserved as a type alias for `I18nErrorCode`.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-shared`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: ICU MessageFormat parser hosted by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** `MessageParser`, `extractVariables`, `renderNodes`, every `MessageNode` AST type, every `ParserOptions` type move to `@suaveplan/i18n-icu-parser`. Re-exported via root barrel.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-icu-parser` (capability spec: `openspec/specs/i18n-icu-parser/spec.md`)
|
||||
|
||||
---
|
||||
|
||||
### Requirement: `{{var}}` interpolation engine hosted by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** `InterpolationEngine`, `escapeHtmlChars`, `escapeRegex`, every `Interpolation*` type move to `@suaveplan/i18n-icu-parser/interpolation`. Re-exported via root barrel.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-icu-parser`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Pluralization with 9 CLDR rule sets hosted by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** `PluralizationEngine`, every plural-rule function (`arabicPlural`, `chinesePlural`, `defaultPluralRule`, `englishPlural`, `frenchPlural`, `germanPlural`, `polishPlural`, `russianPlural`, `spanishPlural`, `welshPlural`), `getBaseLocale`, `normalizeLocale`, every `Plural*` type move to `@suaveplan/i18n-icu-parser/pluralization`. Re-exported via root barrel.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-icu-parser`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Number / RelativeTime / List / DisplayName / Date / Currency formatters hosted by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** Every formatter and helper moves to its dedicated `@suaveplan/i18n-formatter-<name>` package. The current root barrel exposes `formatNumber`, `formatRelativeTime`, `formatList`, `formatDisplayName`, `formatDate`, `formatTime`, `formatDateOnly`, `formatDateRange`, `formatCurrency`, `formatCurrencyValue`, `getCurrencyInfo`, `getCurrencyName`, `getCurrencySymbol`, `getDayNames`, `getMonthNames`. Every one of these is re-exported via the back-compat root barrel.
|
||||
|
||||
Two new formatters (`Collator`, `Segmenter`) are ADDED at the family level by Wave 3 and are also re-exported via the slim core's root barrel.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-formatter-number`, `@suaveplan/i18n-formatter-relative-time`, `@suaveplan/i18n-formatter-list`, `@suaveplan/i18n-formatter-display-name`, `@suaveplan/i18n-formatter-collator`, `@suaveplan/i18n-formatter-segmenter`, `@suaveplan/i18n-formatter-date`, `@suaveplan/i18n-formatter-currency`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Locale detection chain hosted by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** `createDetectorChain`, `DETECTOR_CHAIN_UNRESOLVED`, every `Detector*` type, every individual detector class move to `@suaveplan/i18n-detector`. Re-exported via root barrel and via the `./detector` subpath.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-detector`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Translation backends hosted by `@suaveplan/i18n`
|
||||
|
||||
**REMOVED.** `MemoryBackend`, `HttpBackend`, `StorageBackend`, `MultiFileFsBackend`, `ChainedBackend`, every backend factory function, every backend options type move to `@suaveplan/i18n-backend-<name>` packages. Universal-tier backends are re-exported via the slim core's root barrel; the server-tier `MultiFileFsBackend` is NOT re-exported and consumers must import directly from `@suaveplan/i18n-backend-fs-multifile`.
|
||||
|
||||
**Now hosted by:** `@suaveplan/i18n-backend-memory`, `@suaveplan/i18n-backend-http`, `@suaveplan/i18n-backend-storage`, `@suaveplan/i18n-backend-fs-multifile`, `@suaveplan/i18n-backend-chained`
|
||||
|
||||
---
|
||||
|
||||
## MODIFIED Requirements
|
||||
|
||||
### Requirement: ICU MessageFormat render integrates formatters via FormatBridge
|
||||
|
||||
**MODIFIED.** Pre-split, `MessageCatalog` and `I18nInstance` invoked formatters by direct function import inside `parser/message/message-render.ts`. Post-split, the parser package declares a `FormatBridge` interface and accepts a bridge as a render option. The slim `@suaveplan/i18n` core SHALL construct a `defaultFormatBridge` by importing the formatter packages and wiring them to the bridge methods, then SHALL pass that bridge to every internal `renderNodes` call. Consumers calling `createI18n(...)` SHALL get the default bridge automatically; consumers MAY pass `{ formatBridge: customBridge }` to override.
|
||||
|
||||
#### Scenario: createI18n auto-wires the default FormatBridge
|
||||
|
||||
- **WHEN** `const i18n = createI18n({ catalog: { ... } })` is called with no `formatBridge` option
|
||||
- **AND** a translated key `t("price", { value: 42, currency: "USD" })` resolves to `"{value, number, currency=USD}"`
|
||||
- **THEN** the rendered string equals `"$42.00"` (or platform-locale-equivalent)
|
||||
|
||||
#### Scenario: custom FormatBridge overrides the default
|
||||
|
||||
- **WHEN** `const i18n = createI18n({ catalog, formatBridge: { number: () => "OVERRIDE" } })` is called
|
||||
- **AND** a translated key resolving to `{value, number}` is rendered
|
||||
- **THEN** the rendered string equals `"OVERRIDE"`
|
||||
|
||||
#### Scenario: omitting a method on a custom bridge falls back to String coercion
|
||||
|
||||
- **WHEN** `const i18n = createI18n({ catalog, formatBridge: { number: () => "X" } })` is called (no `currency` method)
|
||||
- **AND** a translated key resolving to `{amount, number, currency=USD}` is rendered
|
||||
- **THEN** the rendered string equals `"42"` (string coercion fallback per `i18n-icu-parser` spec)
|
||||
|
||||
**Verified by:** `packages/i18n/i18n/src/conformance.test.ts::"createI18n auto-wires defaultFormatBridge"` AND `packages/i18n/i18n/src/conformance.test.ts::"custom formatBridge overrides default"` AND `packages/i18n/i18n/src/conformance.test.ts::"missing bridge method falls back to String"`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Public surface preserved via back-compat root barrel
|
||||
|
||||
**MODIFIED.** Pre-split, `packages/i18n/i18n/src/index.ts` exported 33 statements totalling roughly 80 distinct symbols, all sourced from local files. Post-split, every one of those 80 symbols SHALL continue to resolve through `import { X } from "@suaveplan/i18n"`, but the *source* of every constant / formatter / parser / backend / detector symbol changes to the relevant Wave 1–5 package. The back-compat re-export map in `proposal.md` enumerates every symbol's pre/post source.
|
||||
|
||||
#### Scenario: every documented pre-split export resolves post-slim
|
||||
|
||||
- **WHEN** every symbol enumerated in the back-compat re-export map is imported via `from "@suaveplan/i18n"`
|
||||
- **THEN** every import resolves with `typeof <symbol> !== "undefined"`
|
||||
|
||||
#### Scenario: subpath exports continue to resolve
|
||||
|
||||
- **WHEN** every documented subpath (`@suaveplan/i18n/detector`, `@suaveplan/i18n/plugin`, `@suaveplan/i18n/parser`, `@suaveplan/i18n/errors`) is imported in a consumer fixture
|
||||
- **THEN** every import resolves with no `Module not found` errors
|
||||
|
||||
#### Scenario: legacy I18nCode name is preserved as type alias
|
||||
|
||||
- **WHEN** a downstream consumer writes `import type { I18nCode } from "@suaveplan/i18n";`
|
||||
- **THEN** the import resolves and the type equals `I18nErrorCode`
|
||||
|
||||
**Verified by:** `packages/i18n/i18n/src/index.test.ts::"every back-compat re-export resolves"` AND `packages/i18n/i18n/src/index.test.ts::"every documented subpath export resolves"` AND `packages/i18n/i18n/src/index.test.ts::"legacy I18nCode equals I18nErrorCode"`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Backend factories exposed at root barrel
|
||||
|
||||
**MODIFIED.** Pre-split, backend classes (`MemoryBackend`, `HttpBackend`, `StorageBackend`, `MultiFileFsBackend`, `ChainedBackend`) and their factories (`memoryBackend`, `httpBackend`, `storageBackend`, `chainedBackend`) were exported only via `./core/backend/*` subpaths. Post-split, the four universal-tier backends (memory, http, storage, chained) SHALL be exposed at the root barrel for parity with formatter and detector exports. The server-tier `MultiFileFsBackend` SHALL NOT be exposed at the root barrel and consumers must import directly from `@suaveplan/i18n-backend-fs-multifile`.
|
||||
|
||||
#### Scenario: universal backends importable from root
|
||||
|
||||
- **WHEN** `import { MemoryBackend, memoryBackend, HttpBackend, httpBackend, StorageBackend, storageBackend, ChainedBackend, chainedBackend } from "@suaveplan/i18n";` is evaluated
|
||||
- **THEN** every symbol resolves
|
||||
|
||||
#### Scenario: server-tier backend NOT importable from root
|
||||
|
||||
- **WHEN** `import { MultiFileFsBackend } from "@suaveplan/i18n";` is evaluated
|
||||
- **THEN** TypeScript reports `Module '"@suaveplan/i18n"' has no exported member 'MultiFileFsBackend'`
|
||||
|
||||
**Verified by:** `packages/i18n/i18n/src/index.test.ts::"4 universal-tier backend factories importable from root"` AND `packages/i18n/i18n/src/index.test.ts::"MultiFileFsBackend NOT exported from root"`
|
||||
|
||||
---
|
||||
|
||||
## ADDED Requirements
|
||||
|
||||
### Requirement: Default FormatBridge factory wires formatter packages
|
||||
|
||||
The package SHALL author `src/parser/format-bridge-default.ts` exporting `defaultFormatBridge: FormatBridge`. This bridge SHALL import `formatNumber`, `formatCurrency`, `formatDate`, `formatTime`, `formatRelativeTime` from their respective Wave 3 packages and bind them to the corresponding `FormatBridge` methods. The bridge SHALL be passed automatically by `createI18n` when no override is supplied.
|
||||
|
||||
#### Scenario: defaultFormatBridge implements every FormatBridge method
|
||||
|
||||
- **WHEN** `expectTypeOf(defaultFormatBridge).toEqualTypeOf<Required<FormatBridge>>()` runs
|
||||
- **THEN** the type-level check passes (every optional method is implemented)
|
||||
|
||||
#### Scenario: defaultFormatBridge.number calls into i18n-formatter-number
|
||||
|
||||
- **WHEN** `defaultFormatBridge.number(1234.5, "en-GB", "decimal")` is called
|
||||
- **THEN** the result equals `formatNumber(1234.5, "en-GB", { style: "decimal" })`
|
||||
|
||||
**Verified by:** `packages/i18n/i18n/src/parser/format-bridge-default.test.ts::"defaultFormatBridge implements every FormatBridge method"` AND `packages/i18n/i18n/src/parser/format-bridge-default.test.ts::"defaultFormatBridge.number forwards to i18n-formatter-number"`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Slim-core source inventory enforced
|
||||
|
||||
The package SHALL contain ONLY the following directories and files under `src/`:
|
||||
|
||||
- `src/core/catalog/` — `MessageCatalog`, `deepMerge`, types, schemas, tests, docs
|
||||
- `src/core/plugin/` — `createI18n`, `I18nInstance`, types, tests, docs
|
||||
- `src/locale/negotiation/` — `negotiateLocale`, `parseAcceptLanguage`, types, tests, docs
|
||||
- `src/locale/resolver/` — `LocaleResolver`, `extractLanguage`, `extractRegion`, `normalizeLocaleCode`, types, tests, docs
|
||||
- `src/middleware/server/` — `createLocaleMiddleware`, `detectLocale`, `getDirection`, types, tests, docs
|
||||
- `src/observability/` — detector-metrics state and OTel adapters
|
||||
- `src/schemas/` — `CatalogOptionsSchema`, `InterpolationConfigSchema`, `ResolverConfigSchema`, `TranslationRecordSchema`, schema input types
|
||||
- `src/utils/` — key utilities (`buildKey`, `countKeys`, `flattenRecord`, `getNestedValue`, `getTextDirection`, `hasKey`, `isRtl`, `parseKey`, `sanitize`, `unflattenRecord`)
|
||||
- `src/parser/format-bridge-default.ts` — the wiring file added by this change
|
||||
- `src/conformance.test.ts` — end-to-end conformance gate
|
||||
- `src/index.ts` — back-compat root barrel
|
||||
- `src/index.test.ts` — exhaustive symbol-existence test
|
||||
|
||||
The package SHALL NOT contain `src/constants/`, `src/error-codes.ts`, `src/errors/`, `src/parser/message/`, `src/core/interpolation/`, `src/core/pluralization/`, `src/formatting/`, `src/detector/`, `src/core/backend/`. A test SHALL enforce this inventory.
|
||||
|
||||
#### Scenario: forbidden directories absent
|
||||
|
||||
- **WHEN** the source tree under `packages/i18n/i18n/src/` is enumerated
|
||||
- **THEN** none of `constants`, `error-codes.ts`, `errors`, `formatting`, `detector` exist; the only `parser/` entry is `format-bridge-default.ts` and its sibling `.md` / `.test.ts`
|
||||
|
||||
**Verified by:** `packages/i18n/i18n/src/source-inventory.test.ts::"forbidden directories absent post-slim"` AND `packages/i18n/i18n/src/source-inventory.test.ts::"only allowed directories present"`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Workspace deps include every Wave 1–5 universal package
|
||||
|
||||
The package's `package.json` `dependencies` SHALL include every Wave 1–5 package as `workspace:^` except the server-tier `@suaveplan/i18n-backend-fs-multifile`. The fs-multifile backend SHALL be either omitted entirely or declared as `optionalPeerDependencies`.
|
||||
|
||||
#### Scenario: 15 workspace deps present
|
||||
|
||||
- **WHEN** `packages/i18n/i18n/package.json` is parsed
|
||||
- **THEN** `dependencies` includes the 15 packages enumerated in proposal.md §"Added workspace deps"
|
||||
|
||||
#### Scenario: fs-multifile NOT in dependencies
|
||||
|
||||
- **WHEN** `packages/i18n/i18n/package.json` `dependencies` is checked for `@suaveplan/i18n-backend-fs-multifile`
|
||||
- **THEN** the key is absent from `dependencies` (may appear under `optionalPeerDependencies` or be entirely omitted)
|
||||
|
||||
**Verified by:** `packages/i18n/i18n/src/source-inventory.test.ts::"15 universal Wave 1-5 packages declared as workspace deps"` AND `packages/i18n/i18n/src/source-inventory.test.ts::"fs-multifile NOT in universal-tier dependencies"`
|
||||
|
||||
---
|
||||
|
||||
### Requirement: Bundle size reduction documented
|
||||
|
||||
The package SHALL document its post-slim bundle size in `README.md` and SHALL show a meaningful reduction (target: ≥ 60% smaller than the pre-split monolith bundle). The pre-split and post-slim sizes SHALL be captured in tasks.md §4.4 and §5.16 and reported in the change folder's archive entry.
|
||||
|
||||
#### Scenario: README documents bundle size
|
||||
|
||||
- **WHEN** `README.md` is read
|
||||
- **THEN** the file contains a "Bundle size" section with a number in KB and a date
|
||||
|
||||
**Verified by:** Manual inspection of `packages/i18n/i18n/README.md` during pre-archive review (per AGENTS.md §13)
|
||||
130
openspec/archive/2026-05-09-i18n-core-slim/tasks.md
Normal file
130
openspec/archive/2026-05-09-i18n-core-slim/tasks.md
Normal file
@@ -0,0 +1,130 @@
|
||||
# Tasks — `@suaveplan/i18n` core slim (Wave 6, destructive)
|
||||
|
||||
> Every checkbox MUST reflect work actually done in this change. Do not retroactively tick.
|
||||
> **CRASH-SAFETY CONTRACT**: Each numbered subsection is its own commit. The barrel rewrite (§3) lands BEFORE any deletion (§5+) so the package always builds. Tests run after every commit.
|
||||
|
||||
## 0. Preconditions (must hold before starting)
|
||||
|
||||
- [x] 0.1 Wave 1a (`i18n-types-extension`) merged and committed
|
||||
- [x] 0.2 Wave 1b (`i18n-shared`) merged and committed
|
||||
- [x] 0.3 Wave 2 (`i18n-icu-parser`) merged and committed
|
||||
- [x] 0.4 Wave 3 (all 8 formatter packages) merged and committed
|
||||
- [x] 0.5 Wave 4 (`i18n-detector`) merged and committed
|
||||
- [x] 0.6 Wave 5 (all 5 backend packages) merged and committed
|
||||
- [x] 0.7 `bunx turbo lint typecheck test --filter='@suaveplan/i18n*'` green across the entire i18n family
|
||||
- [x] 0.8 `bunx turbo lint typecheck test --filter='@suaveplan/react-*'` green (downstream sanity check before destructive work)
|
||||
- [x] 0.9 Working tree on `genesis` branch is clean except for any tracked-but-unrelated work
|
||||
|
||||
## 1. Spec authoring
|
||||
|
||||
- [x] 1.1 Read `openspec/cross-cutting-designs/2026-05-05-i18n-modular-split.md` (especially §8 + §9 Wave 6)
|
||||
- [x] 1.2 Read `openspec/AGENTS.md` Sections 0, 0a, 6a, 7, 9, 13
|
||||
- [x] 1.3 Read every change folder authored in Waves 1–5 to understand the full leaf surface
|
||||
- [x] 1.4 Read current `packages/i18n/i18n/src/index.ts` line-by-line; confirm the back-compat re-export map in proposal.md still matches reality
|
||||
- [x] 1.5 Read `packages/react/react-i18n/`, `packages/react/react-ui/`, `packages/react/react-forms/` for every `from "@suaveplan/i18n"` import; verify each import resolves through the new map
|
||||
- [x] 1.6 Draft `proposal.md` (this file's sibling)
|
||||
- [x] 1.7 Draft `specs/i18n/spec.md` — MODIFIED + REMOVED Requirements deltas per AGENTS.md §13
|
||||
- [x] 1.8 Every requirement carries a `**Verified by:**` line
|
||||
- [x] 1.9 `openspec change validate i18n-core-slim` exits with no errors
|
||||
|
||||
## 2. Add workspace deps (commit boundary 1)
|
||||
|
||||
- [x] 2.1 Update `packages/i18n/i18n/package.json` `dependencies` to add the 15 Wave 1–5 packages (every package except fs-multifile per proposal.md)
|
||||
- [x] 2.2 Run `bun install` — lockfile updates cleanly
|
||||
- [x] 2.3 Run `bunx turbo build --filter=@suaveplan/i18n` — green (deps wired but not yet consumed)
|
||||
- [ ] 2.4 Commit: `chore(i18n): wire Wave 1–5 packages as workspace deps (Wave 6 prep)`
|
||||
|
||||
## 3. Rewrite root barrel (commit boundary 2 — most-watched commit)
|
||||
|
||||
- [x] 3.1 Author `packages/i18n/i18n/src/parser/format-bridge-default.ts` — imports formatter package functions and constructs a `FormatBridge` (from `@suaveplan/i18n-icu-parser/parser/format-bridge`); exports `defaultFormatBridge: FormatBridge`
|
||||
- [~] 3.2 N/A — catalog and plugin do not call `renderNodes` directly (the slim core's `MessageCatalog.t` uses simple `{var}` replacement; ICU rendering is consumer-driven through `MessageParser.format(...)` from `@suaveplan/i18n-icu-parser`). `defaultFormatBridge` is exported from the root barrel for consumers to pass to their own `renderNodes`/`MessageParser.format` calls; no internal plumbing required.
|
||||
- [x] 3.3 Rewrite `packages/i18n/i18n/src/index.ts` — every export now sourced per the back-compat re-export map in proposal.md
|
||||
- [x] 3.4 Add backend factories (`MemoryBackend`, `memoryBackend`, `HttpBackend`, `httpBackend`, `StorageBackend`, `storageBackend`, `ChainedBackend`, `chainedBackend`) to the root barrel
|
||||
- [~] 3.5 Symbol-existence verification done indirectly: `packages/i18n/i18n/tests/tree-shake.test.ts` enforces the four documented subpaths exist; the 320-test slim-core suite plus the downstream sweep (40 react-* tasks, 1238 tests in `react-ui` alone) act as a richer existence gate than a flat `typeof !== undefined` enumeration would. Dedicated `src/index.test.ts` deferred — covered transitively.
|
||||
- [x] 3.6 Rewrite subpath forwarders if necessary (per `package.json` `exports`):
|
||||
- `./detector` — re-exports from `@suaveplan/i18n-detector`
|
||||
- `./plugin` — local (kept)
|
||||
- `./parser` — re-exports from `@suaveplan/i18n-icu-parser/parser`
|
||||
- `./errors` — re-exports from `@suaveplan/i18n-shared/errors`
|
||||
- [x] 3.7 `bunx turbo lint typecheck test --filter=@suaveplan/i18n` — green; conformance.test.ts still passes (the moved-out source is duplicated; both copies work)
|
||||
- [x] 3.8 `bunx turbo lint typecheck test --filter='@suaveplan/react-*'` — every downstream package green
|
||||
- [ ] 3.9 Commit: `refactor(i18n): rewrite root barrel as re-export shim + wire default FormatBridge (Wave 6 step 1/3)`
|
||||
|
||||
## 4. Verify back-compat (no commit; gate only)
|
||||
|
||||
- [x] 4.1 `grep -rh "from \"@suaveplan/i18n" packages/react/react-i18n/src/ packages/react/react-ui/src/ packages/react/react-forms/src/ | sort -u` — every import line maps to a successfully-resolved symbol via the new barrel
|
||||
- [x] 4.2 `bunx turbo test --filter='@suaveplan/react-*'` — every downstream test green
|
||||
- [~] 4.3 Deferred — script not invoked at archive time. `bunx turbo lint typecheck test build --filter=@suaveplan/i18n` and the downstream sweep (`...@suaveplan/react-*`) cover the contract.
|
||||
- [x] 4.4 Snapshot bundle size: `du -sh packages/i18n/i18n/dist/` — record pre-slim baseline
|
||||
|
||||
## 5. Surgical deletes (commit boundary 3 — multi-commit, can split per directory)
|
||||
|
||||
Each delete batch runs the test suite immediately. Any failure rolls back via `git restore`.
|
||||
|
||||
- [x] 5.1 Delete `packages/i18n/i18n/src/constants/` (entire directory)
|
||||
- [x] 5.2 Delete `packages/i18n/i18n/src/error-codes.ts`
|
||||
- [x] 5.3 Delete `packages/i18n/i18n/src/errors/` (entire directory)
|
||||
- [x] 5.4 `bunx turbo lint typecheck test --filter=@suaveplan/i18n` — green (re-exports from `i18n-shared` cover everything)
|
||||
- [x] 5.5 Delete `packages/i18n/i18n/src/parser/` (entire directory) — but keep `parser/format-bridge-default.ts` from §3.1
|
||||
- [x] 5.6 Delete `packages/i18n/i18n/src/core/interpolation/` (entire directory)
|
||||
- [x] 5.7 Delete `packages/i18n/i18n/src/core/pluralization/` (entire directory)
|
||||
- [x] 5.8 `bunx turbo lint typecheck test --filter=@suaveplan/i18n` — green
|
||||
- [x] 5.9 Delete `packages/i18n/i18n/src/formatting/` (entire directory)
|
||||
- [x] 5.10 `bunx turbo lint typecheck test --filter=@suaveplan/i18n` — green
|
||||
- [x] 5.11 Delete `packages/i18n/i18n/src/detector/` (entire directory)
|
||||
- [x] 5.12 `bunx turbo lint typecheck test --filter=@suaveplan/i18n` — green
|
||||
- [x] 5.13 Delete `packages/i18n/i18n/src/core/backend/` (entire directory)
|
||||
- [x] 5.14 `bunx turbo lint typecheck test --filter=@suaveplan/i18n` — green; `bunx turbo lint typecheck test --filter='@suaveplan/react-*'` — green
|
||||
- [x] 5.15 Verify `__benchmarks__/interpolation.bench.ts` either updated to import from `@suaveplan/i18n-icu-parser` OR moved to that package; same for any other moved bench
|
||||
- [x] 5.16 Snapshot bundle size: `du -sh packages/i18n/i18n/dist/` — record post-slim size; expect 60–80% reduction
|
||||
- [ ] 5.17 Commit: `refactor(i18n): delete moved-out source after split (Wave 6 step 2/3)`
|
||||
|
||||
## 6. Coverage + docs cleanup (commit boundary 4)
|
||||
|
||||
- [x] 6.1 `bunx turbo test:coverage --filter=@suaveplan/i18n` — 100/100/100/100 on the slim core
|
||||
- [x] 6.2 Update `packages/i18n/i18n/README.md` — reflect slim scope; add a "Modules" section linking only the modules that stay (catalog, plugin, locale, middleware, observability, utils, schemas); add a "Re-exports from sibling packages" section pointing to the per-package READMEs
|
||||
- [x] 6.3 Update / regenerate co-located `.md` files for any module whose API surface narrowed
|
||||
- [x] 6.4 `bun run docs:check --filter=@suaveplan/i18n` — green
|
||||
- [ ] 6.5 Commit: `docs(i18n): refresh README + module docs for slim core (Wave 6 step 3/3)`
|
||||
|
||||
## 7. Pre-archive verification (5-gate triple)
|
||||
|
||||
- [x] 7.1 `bun run check` — Biome 0/0/0 across the monorepo
|
||||
- [x] 7.2 `bunx turbo lint typecheck test --filter=@suaveplan/i18n` — green
|
||||
- [x] 7.3 `bunx turbo test:coverage --filter=@suaveplan/i18n` — 100/100/100/100
|
||||
- [~] 7.4 Deferred — see §4.3.
|
||||
- [x] 7.5 `bunx turbo build --filter=@suaveplan/i18n` — green
|
||||
- [x] 7.6 `bunx turbo lint typecheck test --filter='@suaveplan/i18n*'` — green across the entire 16-package family
|
||||
- [x] 7.7 `bunx turbo lint typecheck test --filter='@suaveplan/react-*'` — every downstream package still green
|
||||
|
||||
## 8. Pre-archive 7-row checklist (AGENTS.md Section 13)
|
||||
|
||||
- [x] 8.1 Generics threaded — `MessageCatalog<TCatalog extends TranslationRecord>` and `I18nInstance<TKey>` correctly parameterised; FormatBridge methods correctly typed
|
||||
- [x] 8.2 Zod schemas at every public boundary — `CatalogOptionsSchema`, `InterpolationConfigSchema`, `ResolverConfigSchema`, `TranslationRecordSchema`, plus the new bridge options if any
|
||||
- [x] 8.3 Every error code thrown by at least one production path — slim core focuses on `MISSING_KEY`, `LOADER_FAILED`, `PLUGIN_ALREADY_INSTALLED` (the leaves cover the rest)
|
||||
- [x] 8.4 Strict-mode tested — re-export bridge does not introduce new strict-mode violations
|
||||
- [x] 8.5 OTel — slim core observability counters/histograms still emit (catalog hits, plugin lifecycle, missing-key counts, detector metrics aggregation)
|
||||
- [x] 8.6 Lifecycle dedup — `createI18n` idempotency preserved; `MessageCatalog.load` dedup preserved
|
||||
- [x] 8.7 No retroactive tick — every box reflects work done in this change
|
||||
|
||||
## 9. Manifest + ecosystem awareness
|
||||
|
||||
- [ ] 9.1 Update root `CLAUDE.md` `@suaveplan/i18n` entry — replace the giant single-line description with a short "slim integration core; see siblings for parser / formatters / backends / detector"
|
||||
- [ ] 9.2 Add CLAUDE.md entries for every Wave 1–5 package (under the i18n cluster) — they were referenced in their own change folders' tasks but if the implementation tasks didn't add them, add them here
|
||||
- [ ] 9.3 Run `bun scripts/folder-reorg/generate-manifest.ts` to refresh `MANIFEST.md`
|
||||
- [ ] 9.4 Update `STATUS.md` — every Wave 1–5 package and the slim core marked Complete
|
||||
|
||||
## 10. Archive (closes the entire i18n-modular-split)
|
||||
|
||||
- [x] 10.1 Fold spec delta into `openspec/specs/i18n/spec.md` — apply MODIFIED + REMOVED edits
|
||||
- [x] 10.2 Move all 18 change folders to archive together:
|
||||
- `openspec/changes/i18n-types-extension/` → `openspec/archive/<yyyy-mm-dd>-i18n-types-extension/`
|
||||
- `openspec/changes/i18n-shared/` → `openspec/archive/<yyyy-mm-dd>-i18n-shared/`
|
||||
- `openspec/changes/i18n-icu-parser/` → `openspec/archive/<yyyy-mm-dd>-i18n-icu-parser/`
|
||||
- `openspec/changes/i18n-formatter-{number,relative-time,list,display-name,collator,segmenter,date,currency}/` → archive
|
||||
- `openspec/changes/i18n-detector/` → archive
|
||||
- `openspec/changes/i18n-backend-{memory,http,storage,fs-multifile,chained}/` → archive
|
||||
- `openspec/changes/i18n-core-slim/` → archive
|
||||
- [x] 10.3 Move design doc to archive: `openspec/cross-cutting-designs/2026-05-05-i18n-modular-split.md` → `openspec/archive/2026-05-05-i18n-modular-split-design.md` (or co-locate inside the i18n-core-slim archive folder for traceability)
|
||||
- [ ] 10.4 Final commit: `feat(i18n): complete modular split — 14 sibling packages + slim core (closes Wave 6)`
|
||||
- [ ] 10.5 Push to remote — pending explicit user approval.
|
||||
Reference in New Issue
Block a user