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; --subtract --apply executes the removals the operator picks
/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/agents/MCP/hooks/CLAUDE.md (with token estimates, and model/effort per agent)
/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.

GAP dimensions vs. levers (invariant). GAP_CHECKS holds the 24 dimensions — always evaluated, always counted in the utilization denominators (TIER_COUNTS / TOTAL_DIMENSIONS in scoring.mjs, and TITLE_TO_ID there). A lever is a finding the scanner emits after the loop and only under a measured condition; it carries no tier, never enters those denominators, and is registered in the exported LEVERS object (code + title in one place, because the finding-code guard needs the code and the humanizer-coverage guard needs the title). Adding a dimension moves every user's utilization score and can flip the reported segment in a frozen baseline — adding a lever cannot. When a check is only meaningful for configs that already have some feature, it is a lever.

{NNN} names the CHECK, never the emission position (invariant). scanners/lib/finding-codes.mjs is the single authority: every finding() call passes a code, and an undeclared or missing one throws — there is no counter fallback, because a fallback lets a half-converted scanner ship IDs that look valid. Adding a check takes the next free number for that scanner, never the next source-order position; removing one moves its key to RETIRED_CODES and its number is never reissued. IDs are therefore not unique per finding — one check failing in three files emits three findings sharing an ID, and (id, file, line) is the instance key that fix-engine verification uses. Frozen v5.0.0 baselines mask IDs (tests/helpers/mask-finding-ids.mjs) instead of re-deriving them; the check→number pairs are pinned exhaustively in tests/lib/finding-codes.test.mjs.

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.

Write-scope gate (invariant). Every write target is classified by scanners/lib/write-scope.mjs before it reaches an approval surface, and the scope class decides the gate's strength — never the command asking. Five command-owned policies would drift apart the way five copies of the lever table did. SCOPE_CLASSES is the single source for class, gate (silent/disclose/require-ok), wording and predicate; templates render disclosures[] from write-scope-cli.mjs rather than restating what a class means. Two orderings in that object are load-bearing and were measured, not reasoned about: plugin-managed before user-scope (both ~/.claude/config-audit/ and legacy ~/.config-audit/ are live, so the other order fires the gate on every session write and gets it switched off), and user-scope before cross-repo (~/.claude/.git exists, so a plain .git-upward walk calls ~/.claude/CLAUDE.md merely "another repo" and silently downgrades the strongest gate). disclose ≠ require-ok: campaign export is cross-repo by design, so tightening it into a refusal breaks the feature. Distinct from the require-target-dir.mjs guard, which asks whether a scan root is readable (exit 3) — a different invariant, not to be merged.

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.

Subtraction write path (invariant). --apply routes through scanners/lib/subtraction-write.mjs, never through fix-engine or the plan/implement pipeline, and both exclusions are measured: the subtraction axis is absent from the orchestrated envelope, so verifyFixes' re-scan would mark every removal verified whether or not it happened (a success-shaped no-op), and the findings pipeline needs a finding code — which names a deterministic check, not a prose judgement. Three properties are load-bearing and each has a guard seen red against its own defect: removals are validated against the ORIGINAL content and applied in descending line order (an ascending pass shifts later spans out from under themselves); the range check is not redundant with the text check (line: 0 makes slice(-1, 0) empty, so an empty text matches and splice(-1, 1) deletes the file's LAST line); and createBackup skips a nonexistent path while still returning an id, so coverage of every file about to be written is asserted from the manifest before a byte changes. The floor is repeated here, not moved: floor-exclusion still vetoes before anything is proposed, and the engine refuses a load-bearing block again so a hand-built approval cannot route around it. The archive rule (mv to _archive/) is file-level and does not apply to a block excision — the timestamped backup is the recovery artifact, and inventing a second copy with no restorer behind it would be worse than none.

Testing

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