cc-os/plugins/os-doc-hygiene/openspec/changes/lifecycle-aware-doc-hygiene/specs/determinism-promotion/spec.md

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# Spec: determinism-promotion
## ADDED Requirements
### Requirement: Conventions Catalog Is Global-Only and Machine-Readable
The plugin SHALL ship a global-only, machine-readable completion-conventions
catalog at `plugins/os-doc-hygiene/conventions.json`. There SHALL be no
per-project override of this catalog — it only recommends; adoption of a
convention lands in the project's own rulebook, not in a project-specific
copy of the catalog.
#### Scenario: The catalog is read from a single global location
- **WHEN** the deterministic pipeline consults the conventions catalog
- **THEN** it reads `plugins/os-doc-hygiene/conventions.json` and no project-level override file for it exists or is consulted
#### Scenario: Adoption is a rulebook write, not a catalog write
- **WHEN** a project adopts a convention
- **THEN** the adoption is expressed as a graduated rule in the project's `.dochygiene-rules.json`, and the global catalog itself is unchanged
### Requirement: Convention Entry Shape
Each entry in the conventions catalog SHALL record: a name, a description of
what the convention proves (i.e., what filesystem-observable condition
counts as "done"), the `served_when_path` pattern or frontmatter template a
rule graduates to when the convention is adopted, and a one-line human pitch
for why adopting it is worthwhile.
#### Scenario: An entry carries all required fields
- **WHEN** a convention entry is read from the catalog
- **THEN** it includes a name, a "what it proves" description, the graduation target (`served_when_path` pattern or frontmatter template), and a one-line pitch
### Requirement: v1 Catalog Contains Exactly Two Conventions
The v1 conventions catalog SHALL contain exactly two entries: `archive-bucket`
(done = the file moved into a sibling `archive/` directory, graduating a rule
to `served_when_path: <dir>/archive/{name}`) and `status-frontmatter` (done =
a `status: shipped|done` frontmatter key is present, with the file staying in
place and the scanner reading the frontmatter). No other conventions SHALL be
present in v1.
#### Scenario: Exactly two conventions ship in v1
- **WHEN** the v1 conventions catalog is loaded
- **THEN** it contains exactly the `archive-bucket` and `status-frontmatter` entries and no others
#### Scenario: archive-bucket graduates to a served_when_path
- **WHEN** a project adopts `archive-bucket` for a rule
- **THEN** the rule graduates from a classifier-judged `served_when` to a scanner-provable `served_when_path` pointing at the sibling `archive/` directory
#### Scenario: status-frontmatter graduates via a frontmatter key
- **WHEN** a project adopts `status-frontmatter` for a rule
- **THEN** the rule graduates to a condition the scanner can check deterministically by reading a `status: shipped|done` frontmatter key, with the file remaining at its original path
### Requirement: Check Names Promotion Candidates Deterministically in Every Report
The `:check` skill's deterministic finalize pass SHALL, for every entry whose
lifecycle signal is classifier-judged (`served_when` present, no
`served_when_path`), check the conventions catalog for an applicable
not-yet-adopted convention and, when one applies, emit an entry in the
report's `promotion_candidates` section naming the convention and its
one-line pitch. This check SHALL run without any model call.
#### Scenario: A classifier-judged entry with an applicable convention is named
- **WHEN** an entry uses `served_when` and the `archive-bucket` convention is not yet adopted for that rule
- **THEN** the report's `promotion_candidates` section names `archive-bucket` for that entry with its one-line pitch
#### Scenario: Promotion-candidate naming requires no model call
- **WHEN** `report_builder.py` computes `promotion_candidates`
- **THEN** it does so by reading `conventions.json` and the project's rulebook state directly, with no subagent dispatch
#### Scenario: An already-adopted convention is not re-named
- **WHEN** a rule has already graduated to a `served_when_path` matching a catalog convention
- **THEN** that rule does not reappear in `promotion_candidates`
### Requirement: Calibrate May Draft Adoption but Never Applies Unasked
The `:calibrate` skill MAY draft the adoption of a catalog convention — the
graduated rule plus the file moves or frontmatter additions the convention
implies — and present it to the human for approval. It SHALL NEVER apply an
adoption without explicit human confirmation.
#### Scenario: Calibrate drafts a convention adoption for review
- **WHEN** `:calibrate` identifies an unmatched pattern that would benefit from `archive-bucket`
- **THEN** it drafts the graduated rule and the implied file moves and presents them to the human before any change is made
#### Scenario: No adoption is applied without confirmation
- **WHEN** a human has not yet confirmed a drafted adoption
- **THEN** no rulebook write and no file move occurs