# Spec: doc-check (delta)

## MODIFIED Requirements

### Requirement: Check Skill Orchestrates Scan, Classification, and Report Writing

The `check` skill SHALL orchestrate the check pipeline: load the lifecycle
rulebook (global plus any project override), run the deterministic scanner
(consuming the rulebook so directory-rule matches prune the walk and
lifecycle signals are attached per the `lifecycle-rulebook` spec), dispatch
a Sonnet subagent for judgment-only classification of the signal-bearing
candidates, run the deterministic finalize pass (which also computes
`promotion_candidates` from `conventions.json`), validate, write the report
pair, and stamp `last_check`. The skill SHALL run all non-judgment steps as
deterministic scripts with no model (invariant #6). Zero-signal shortlisted
files SHALL be treated as presumptively cleared: they SHALL remain in the
shortlist, produce no entries, and SHALL NOT be read by the model. A
`--scope` argument SHALL narrow the scanner; a `--category` argument SHALL
filter which entries are produced after classification; both SHALL be
recorded in the human-report header.

#### Scenario: Skill runs the full pipeline

- **WHEN** the `check` skill runs
- **THEN** it loads the rulebook, scans (deterministic, rulebook-aware), classifies signal-bearing candidates (Sonnet), finalizes (deterministic, including promotion candidates), validates (deterministic), writes the report pair (deterministic), and stamps `last_check` (deterministic)

#### Scenario: Zero-signal files are not read by the model

- **WHEN** a shortlisted file carries no scanner signals
- **THEN** it remains in the shortlist, produces no entry, and is not read by the classification model

#### Scenario: Scope and category are recorded and applied

- **WHEN** the user passes `--scope docs/**/*.md` and `--category bloat`
- **THEN** the scanner is narrowed by the scope, only `bloat` entries are produced after classification, and both the scope and the category are recorded in the human-report header

#### Scenario: Rulebook load failure is a hard failure, not a silent skip

- **WHEN** the rulebook loader hard-fails (unparseable JSON or unknown `schema_version` in either rulebook file)
- **THEN** the check skill stops and reports the rulebook error before running the scanner, rather than proceeding with lifecycle signals silently disabled

## ADDED Requirements

### Requirement: Scanner Consumes the Rulebook for Pruning and Lifecycle Signals

The deterministic scanner SHALL consult the loaded rulebook during its walk.
A directory-rule match (including IGNORE-surface entries) SHALL prune the
walk beneath that directory per the `lifecycle-rulebook` spec. A file-rule
match SHALL attach a lifecycle signal to that file's shortlist entry. These
lifecycle signals SHALL flow into the classification subagent as a new
signal class alongside the pre-existing stale/bloat signals, and MAY drive
`op`/`op_type` selection toward `delete` or `extract-then-delete` per the
`lifecycle-deletion` spec.

#### Scenario: A directory-rule prune is reflected in the scan artifact

- **WHEN** the scanner encounters a directory matching a directory rule
- **THEN** the scan artifact reflects the prune (no files beneath it are in `files_scanned`), and, for non-IGNORE directory rules, exactly one aggregate shortlist entry appears for that directory

#### Scenario: A file-rule lifecycle signal reaches the classifier

- **WHEN** a file matches a file-rule with `lifetime: delete-once-served`
- **THEN** the classification subagent receives the lifecycle signal (rule reference, lifetime, served_when/served_when_path) as part of that file's signals, verbatim, per the existing "signals are passed through verbatim" contract

### Requirement: Report Gains a Promotion-Candidates Section

The machine and human reports produced by `:check` SHALL include a
`promotion_candidates` section (top-level, sibling to `entries`), populated
deterministically by the finalize pass from `conventions.json` for every
classifier-judged lifecycle entry with an applicable, not-yet-adopted
convention. This section SHALL be present (possibly empty) on every run,
including runs with no lifecycle entries.

#### Scenario: A run with an applicable convention names it in both reports

- **WHEN** a classifier-judged entry has an applicable, unadopted convention
- **THEN** both the machine report's `promotion_candidates` array and the human report show the candidate with its one-line pitch

#### Scenario: A run with no applicable conventions still has the section, empty

- **WHEN** no classifier-judged entry has an applicable unadopted convention
- **THEN** `promotion_candidates` is present as an empty array/section rather than omitted
