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Tom Boucher 1a3d953767 feat: add unified post-planning gap checker (closes #2493) (#2610)
* feat: add unified post-planning gap checker (closes #2493)

Adds a unified post-planning gap checker as Step 13e of plan-phase.md.
After all plans are generated and committed, scans REQUIREMENTS.md and
CONTEXT.md <decisions> against every PLAN.md in the phase directory and
emits a single Source | Item | Status table.

Why
- The existing Requirements Coverage Gate (§13) blocks/re-plans on REQ
  gaps but emits two separate per-source signals. Issue #2493 asks for
  one unified report after planning so that requirements AND
  discuss-phase decisions slipping through are surfaced in one place
  before execution starts.

What
- New workflow.post_planning_gaps boolean config key, default true,
  added to VALID_CONFIG_KEYS, CONFIG_DEFAULTS, hardcoded.workflow, and
  cmdConfigSet (boolean validation).
- New get-shit-done/bin/lib/decisions.cjs — shared parser for
  CONTEXT.md <decisions> blocks (D-NN entries). Designed for reuse by
  the related #2492 plan/verify decision gates.
- New get-shit-done/bin/lib/gap-checker.cjs — parses REQUIREMENTS.md
  (checkbox + traceability table forms), reads CONTEXT.md decisions,
  walks PHASE_DIR/*-PLAN.md, runs word-boundary coverage detection
  (REQ-1 must not match REQ-10), formats a sorted report.
- New gsd-tools gap-analysis CLI command wired through gsd-tools.cjs.
- workflows/plan-phase.md gains §13e between §13d (commit plans) and
  §14 (Present Final Status). Existing §13 gate preserved — §13e is
  additive and non-blocking.
- sdk/prompts/workflows/plan-phase.md gets an equivalent
  post_planning_gaps step for headless mode.
- Docs: CONFIGURATION.md, references/planning-config.md, INVENTORY.md,
  INVENTORY-MANIFEST.json all updated.

Tests
- tests/post-planning-gaps-2493.test.cjs: 30 test cases covering step
  insertion position, decisions parser, gap detector behavior
  (covered/not-covered, false-positive guard, missing-file
  resilience, malformed-input resilience, gate on/off, deterministic
  natural sort), and full config integration.
- Full suite: 5234 / 5234 pass.

Design decisions
- Numbered §13e (sub-step), not §14 — §14 already exists (Present
  Final Status); inserting before it preserves downstream auto-advance
  step numbers.
- Existing §13 gate kept, not replaced — §13 blocks/re-plans on
  REQ gaps; §13e is the unified post-hoc report. Per spec: "default
  behavior MUST be backward compatible."
- Word-boundary ID matching avoids REQ-1 matching REQ-10 and avoids
  brittle semantic/substring matching.
- Shared decisions.cjs parser so #2492 can reuse the same regex.
- Natural-sort keys (REQ-02 before REQ-10) for deterministic output.
- Boolean validation in cmdConfigSet rejects non-boolean values
  matches the precedent set by drift_threshold/drift_action.

Closes #2493

* fix(#2493): expose post_planning_gaps in loadConfig() + sync schema example

Address CodeRabbit review on PR #2610:

- core.cjs loadConfig(): return post_planning_gaps from both the
  config.json branch and the global ~/.gsd/defaults.json fallback so
  callers can rely on config.post_planning_gaps regardless of whether
  the key is present (comment 3127977404, Major).
- docs/CONFIGURATION.md: add workflow.post_planning_gaps to the Full
  Schema JSON example so copy/paste users see the new toggle alongside
  security_block_on (comment 3127977392, Minor).
- tests/post-planning-gaps-2493.test.cjs: regression coverage for
  loadConfig() — default true when key absent, honors explicit
  true/false from workflow.post_planning_gaps.
2026-04-22 23:03:59 -04:00
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