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openspec/archive/2026-04-19-enterprise-overview/specs/overview/spec.md

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+# Capability Spec: overview
+
+**Package**: `@suaveplan/overview`
+**Version**: 0.0.0 (genesis)
+**Status**: ADDED
+
+---
+
+## ADDED Requirements
+
+### OVR-01 — Manifest schema
+`ManifestSchema` MUST validate `{ generatedAt: ISO-8601 string, version: semver, categories: Category[], packages: Package[] }`. Every `Package.dependsOn` entry MUST reference an existing `Package.name`. Duplicate names MUST be rejected with `OVERVIEW.MANIFEST_INVALID`.
+
+### OVR-02 — Topological layers
+`layerFor(name, manifest)` MUST return a non-negative integer such that a package with `dependsOn = []` has layer 0, and every other package's layer is one more than the max of its dependencies' layers. If a cycle is detected, `layerFor` MUST throw `OVERVIEW.CYCLE_DETECTED`.
+
+### OVR-03 — Graph walkers
+`dependenciesOf(name, manifest)` MUST return the transitive closure of a package's `dependsOn` edges. `dependentsOf(name, manifest)` MUST return the transitive closure of the reverse edges. Both MUST throw `OVERVIEW.PACKAGE_NOT_FOUND` for unknown names.
+
+### OVR-04 — Generator contract
+The generator script MUST scan every workspace `package.json`, merge with `FOLDERS.yml`, and produce a deterministic `manifest.json` at the repo root. Output MUST be stable: re-running the generator with no workspace changes MUST produce byte-identical output.
+
+### OVR-05 — Validation at the boundary
+`loadManifest(path?)` MUST read and `ManifestSchema.parse` the file. Malformed JSON MUST surface as `OVERVIEW.MANIFEST_INVALID` with the path and parser reason in context.