config-audit/CLAUDE.md

# Config-Audit Plugin

Claude Code Configuration Intelligence — know if your config is correct, find what could improve it, fix it automatically. Three pillars: **Health** (deterministic scanners), **Opportunities** (context-aware recommendations), **Action** (auto-fix with backup/rollback).

Per-command flags, patterns, and feature lists live in `README.md` and `/config-audit help`. This file carries what's invariant for working on the plugin.

**Positioning vs. built-in `/doctor` (measured 2026-08-03, binding):** we are the deterministic/reproducible/all-scope/zero-quota side; `/doctor` is usage-weighted one-shot judgment. Never build a feature whose whole value is duplicating a `/doctor` check — see README «config-audit vs. the built-in /doctor» and `docs/v5.13-model-routing-effort-deadref-plan.md` §A.

## Commands

### Core (just run `/config-audit` to get started)

| Command | Description |
|---------|-------------|
| `/config-audit` | Full audit with auto-scope detection |
| `/config-audit posture` | A-F health scorecard (10 quality areas) |
| `/config-audit tokens` | Prompt-cache-aware token hotspots, each tagged with its load pattern; cache-aware |
| `/config-audit manifest` | Ranked table of every token source + always-loaded subtotal |
| `/config-audit feature-gap` | Context-aware feature recommendations grouped by impact |
| `/config-audit optimize` | Mechanism-fit lens (procedure→skill, lifecycle→hook, path→rule, never→permission). Agent-driven, **not byte-stable**. `--subtract` adds the subtraction axis (what no longer earns its always-loaded rent, `BP-SUB-001`) — opt-in, proposes only |
| `/config-audit fix` | Auto-fix deterministic issues with backup + verification |
| `/config-audit rollback` | Restore configuration from backup |
| `/config-audit plan` | Create action plan from findings |
| `/config-audit implement` | Execute plan with backups + auto-verify |
| `/config-audit help` | Show all commands |

### Additional

| Command | Description |
|---------|-------------|
| `/config-audit drift` | Compare current config against saved baseline |
| `/config-audit plugin-health` | Audit plugin structure, frontmatter, cross-plugin coherence |
| `/config-audit whats-active` | Read-only inventory of active plugins/skills/MCP/hooks/CLAUDE.md (with token estimates) |
| `/config-audit knowledge-refresh` | Refresh the best-practices register (stale check + web poll). Human-approved writes; **not byte-stable** |
| `/config-audit campaign` | Machine-wide audit ledger + token bill across repos. Human-approved writes; **not byte-stable** |
| `/config-audit discover` | Run discovery phase only |
| `/config-audit analyze` | Run analysis phase only |
| `/config-audit interview` | Gather user preferences (opt-in) |
| `/config-audit status` | Show current session state |
| `/config-audit cleanup` | Clean up old sessions |

## Agents

| Agent | Role | Model | Color | Tools |
|-------|------|-------|-------|-------|
| scanner-agent | Find config files | sonnet | cyan | Read, Glob, Grep, Write |
| analyzer-agent | Generate report | sonnet | blue | Read, Glob, Grep, Write |
| planner-agent | Create action plan | opus | yellow | Read, Glob, Write |
| implementer-agent | Execute changes | sonnet | magenta | Read, Write, Edit, Bash, Glob |
| verifier-agent | Verify results | sonnet | purple | Read, Glob, Grep |
| feature-gap-agent | Feature recommendations | opus | green | Read, Glob, Grep, Write |
| optimization-lens-agent | Mechanism-fit precision gate | opus | orange | Read, Glob, Grep, Write |

## Hooks

| Event | Script | Purpose |
|-------|--------|---------|
| PreToolUse | `auto-backup-config.mjs` | Backup config files before Edit/Write |
| PostToolUse | `post-edit-verify.mjs` | Verify after Edit/Write, block on new critical/high |
| SessionStart | `session-start.mjs` | Check for active (unfinished) sessions |
| Stop | `stop-session-reminder.mjs` | Remind about current session phase |

## Reference docs (read on demand)

- `docs/scanner-internals.md` — scanner inventory, lib modules, action engines, knowledge base, per-scanner/per-block implementation notes (design rationale, primary-source verification, byte-stability lessons)
- `docs/humanizer.md` — plain-language output (v5.1.0), humanizer vocabularies, output modes

## Plain-Language Output (v5.1.0)

Default output of all commands routes through `humanizeEnvelope` (`lib/humanizer.mjs`), decorating each finding with `userImpactCategory`, `userActionLanguage`, and `relevanceContext`. `--raw` and `--json` bypass the humanizer for byte-stable v5.0.0 output. Full detail: `docs/humanizer.md`.

## Suppressions

Create `.config-audit-ignore` at project root — one exact ID or glob per line (`CA-SET-003`, `CA-GAP-*`). Suppressed findings are tracked in the envelope's `suppressed_findings` for audit trail. Disable with `--no-suppress`.

## Architecture

Workflow: `/config-audit → discover + analyze (auto) → plan → implement → verify`. Auto-detects scope from git context; override with `full|repo|home|current`; `--delta` for incremental. Session state lives under `~/.claude/config-audit/sessions/{id}/` (scope.yaml, discovery.json, state.yaml, findings/, analysis-report.md, action-plan.md, backups/, implementation-log.md).

Finding ID format: `CA-{SCANNER}-{NNN}` — e.g. `CA-CML-001`, `CA-SET-003`, `CA-HKV-002`, `CA-RUL-005`, `CA-TOK-005`, `CA-CPS-001`, `CA-SKL-001`, `CA-OST-001`, `CA-OPT-001`, `CA-AGT-001`.

## Conventions

Enforced conventions live in `.claude/rules/` (auto-loaded as project instructions):
- `ux-rules.md` — output/narration/formatting for all commands (never dump raw JSON, narrate before each step, space-separated command suggestions)
- `command-development.md` — required command frontmatter + `plugin:action` naming
- `agent-development.md` — agent frontmatter + "when to use" conventions
- `state-management.md` — update `state.yaml` after every workflow phase

Coding style: scanners are zero-dependency Node ESM; new findings use the `CA-{SCANNER}-{NNN}` ID format; byte-stable CLIs are verified against frozen `tests/snapshots/v5.0.0/` baselines.

**Subtraction floor (invariant).** `optimize --subtract` is the only lens that proposes removing config, so `scanners/lib/floor-exclusion.mjs` runs as a deterministic pre-step *before* the judge — a load-bearing block is never a candidate, and that guarantee must not be moved into the agent prompt. Two rules follow from it: (1) **staleness is not a deletion signal** — an outdated version pin inside a floor block is a `drift`/`CA-CML` dead-reference concern; (2) **tier 2 ≠ tier 3** — a compensatory block that keeps earning its place returns, and reporting it as dead weight is wrong even when the label matches. Norwegian keywords need the Unicode boundaries in `subtraction-prefilter.mjs`; JS `\b` is ASCII-only, so `/\bunngå\b/` silently never matches.

## Testing

```bash
node --test 'tests/**/*.test.mjs'
```

Test fixtures in `tests/fixtures/`. Per-scanner and per-build-block implementation notes (design rationale, primary-source verification, byte-stability lessons) live in `docs/scanner-internals.md` → **Implementation notes**.

## Gotchas

- Session directories accumulate — use `/config-audit cleanup` to manage
- Scanners run on Node.js ≥ 18 (uses node:test, node:fs/promises)
- Plugin CLAUDE.md files in node_modules should be excluded via scope