# Config-Audit — Scanner internals

Detailed scanner inventory, lib modules, action engines, knowledge base. Imported from `CLAUDE.md` via pointer.

## Deterministic Scanners

Node.js scanners (zero external dependencies), run via `node scanners/scan-orchestrator.mjs <path>`.
Posture CLI: `node scanners/posture.mjs <path> [--json] [--global] [--full-machine] [--output-file path]`.
Scanner CLI: `node scanners/scan-orchestrator.mjs <path> [--global] [--full-machine] [--no-suppress]`.

| Scanner | Prefix | Detects |
|---------|--------|---------|
| `claude-md-linter.mjs` | CML | Structure, length, sections, @imports, duplicates, TODOs |
| `settings-validator.mjs` | SET | Schema, unknown/deprecated keys, type mismatches, permissions |
| `hook-validator.mjs` | HKV | Format, script existence, event validity, timeouts |
| `rules-validator.mjs` | RUL | Glob matching, orphan rules, deprecated fields, unscoped rules |
| `mcp-config-validator.mjs` | MCP | Server types, trust levels, env vars, unknown fields |
| `import-resolver.mjs` | IMP | Broken @imports, circular refs, deep chains, tilde paths |
| `conflict-detector.mjs` | CNF | Settings conflicts, permission contradictions, hook duplicates |
| `feature-gap-scanner.mjs` | GAP | 25 feature checks across 4 tiers — shown as opportunities, not grades |
| `token-hotspots.mjs` | TOK | Cache-breaking volatile content, redundant tool permissions, deep import chains, oversized cascade, bloated SKILL.md descriptions, MCP tool-schema budget (Opus 4.7 patterns) |
| `cache-prefix-scanner.mjs` | CPS | Volatile content in lines 31–150 of CLAUDE.md cascade (beyond Pattern A's top-30 window) |
| `disabled-in-schema-scanner.mjs` | DIS | Tools listed in BOTH `permissions.deny` AND `permissions.allow` — deny wins, allow entries are dead config |
| `collision-scanner.mjs` | COL | Cross-plugin skill name collisions (low); user-vs-plugin overlaps (medium); `details.namespaces` payload |

## Scanner Lib (`scanners/lib/`)

| Module | Purpose |
|--------|---------|
| `severity.mjs` | Severity constants, risk scoring, verdict logic, `WEIGHTS` named export (v5 F3) |
| `output.mjs` | Finding objects (CA-XXX-NNN format), scanner results, envelope, optional `details` payload (v5 N6) |
| `file-discovery.mjs` | Config file discovery: single-path, multi-path (`discoverConfigFilesMulti`), full-machine (`discoverFullMachinePaths`) |
| `yaml-parser.mjs` | Frontmatter parsing, JSON parsing, @import/section extraction |
| `string-utils.mjs` | Line counting, truncation, similarity, key extraction |
| `scoring.mjs` | Severity-weighted `scoreByArea` (v5 F3), health scorecard, dedup-by-area (v5 N3), `scoringVersion: 'v5'` |
| `backup.mjs` | Backup creation, manifest parsing, checksum verification |
| `diff-engine.mjs` | Drift diffing: diffEnvelopes(), formatDiffReport() |
| `baseline.mjs` | Baseline save/load/list/delete for drift detection |
| `report-generator.mjs` | Unified markdown reports: posture, drift, plugin health |
| `suppression.mjs` | .config-audit-ignore parsing, finding suppression, audit trail |
| `active-config-reader.mjs` | Read-only inventory: readActiveConfig(), detectGitRoot(), walkClaudeMdCascade(), readClaudeJsonProjectSlice() (longest-prefix match), enumeratePlugins(), enumerateSkills(), readActiveHooks(), readActiveMcpServers() (with cache → package.json tool-count fallback), estimateTokens() (v5: `'mcp'` kind = 500 + toolCount × 200) |
| `tokenizer-api.mjs` | Anthropic `count_tokens` wrapper for `--accurate-tokens` (v5 N5); 5s AbortController timeout, exponential 429 backoff, key masking |
| `humanizer.mjs` | Plain-language output translator (v5.1.0): `humanizeFinding`, `humanizeFindings`, `humanizeEnvelope`, `computeRelevanceContext`. Pure functions; never mutate inputs. Adds `userImpactCategory`, `userActionLanguage`, `relevanceContext` fields and replaces title/description/recommendation when a translation exists. Bypassed by `--raw` and `--json` paths. |
| `humanizer-data.mjs` | TRANSLATIONS table for 13 scanner prefixes (CML/SET/HKV/RUL/MCP/IMP/CNF/COL/TOK/CPS/DIS/GAP/PLH). Three-step lookup: exact title → regex pattern → `_default` → fall through to original |

## Action Engines (`scanners/`)

| Module | Purpose |
|--------|---------|
| `fix-engine.mjs` | planFixes(), applyFixes(), verifyFixes() — 9 fix types |
| `rollback-engine.mjs` | listBackups(), restoreBackup(), deleteBackup() |
| `fix-cli.mjs` | CLI: `node fix-cli.mjs <path> [--apply] [--json] [--global]` |
| `drift-cli.mjs` | CLI: `node drift-cli.mjs <path> [--save] [--baseline name] [--json]` |
| `whats-active.mjs` | CLI: `node whats-active.mjs <path> [--json] [--verbose] [--suggest-disables]` — read-only active-config inventory |
| `token-hotspots-cli.mjs` | CLI: `node token-hotspots-cli.mjs <path> [--json] [--global] [--output-file path] [--accurate-tokens] [--with-telemetry-recipe]` — Opus-4.7 token hotspots ranking with optional API calibration |
| `manifest.mjs` | CLI: `node manifest.mjs <path> [--json]` — ranked system-prompt token-source table (v5 N2) |

## Standalone Scanner

| Module | Prefix | Purpose |
|--------|--------|---------|
| `plugin-health-scanner.mjs` | PLH | Plugin structure, frontmatter, cross-plugin conflicts (runs independently) |
| `self-audit.mjs` | — | Runs all scanners + plugin health on this plugin itself |

## Knowledge Base (`knowledge/`)

| File | Content |
|------|---------|
| `claude-code-capabilities.md` | Feature register: 18 config surfaces, Anthropic guidance, relevance table |
| `configuration-best-practices.md` | Per-layer best practices (v5: Opus 4.7 cache-stability guidance replaces Sonnet-era 200-line rule) |
| `anti-patterns.md` | Common mistakes mapped to scanner IDs |
| `hook-events-reference.md` | All 26 hook events with details |
| `feature-evolution.md` | Feature timeline for staleness detection |
| `gap-closure-templates.md` | Config-specific templates for closing gaps |
| `opus-4.7-patterns.md` | Token-cost dynamics for Opus 4.7 era — patterns powering the TOK scanner |
| `cache-telemetry-recipe.md` | Manual `jq` recipe for verifying prompt-cache hit rate from session transcripts (v5 M7) |