diff --git a/plugins/config-audit/CHANGELOG.md b/plugins/config-audit/CHANGELOG.md
index ee09e45..77ab479 100644
--- a/plugins/config-audit/CHANGELOG.md
+++ b/plugins/config-audit/CHANGELOG.md
@@ -5,6 +5,32 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [5.0.0-alpha.2] - 2026-05-01
+
+### Summary
+Second v5.0.0 alpha — structural gaps + README self-audit. TOK pattern severities recalibrated for tokens/turn impact (F7), three new findings cover settings/skills/cascade structure (M2, M4, M6), MCP tool-count detection wired (M1), HKV gains a verbose-output check (M5), and self-audit grows a `--check-readme` flag (F6).
+
+### Added
+- **F7 — TOK severity recalibration:** Pattern A (cache-breaking volatile top) `medium → high`, Pattern B (redundant permissions) `low → medium`, Pattern C (deep imports) `medium → low`. Each finding now carries a `calibration_note` evidence field documenting the heuristic basis.
+- **M6 — `additionalDirectories` settings key:** added to `KNOWN_KEYS` so it no longer trips "unknown settings key". New low-severity finding when `additionalDirectories.length > 2`.
+- **M4 — TOK Pattern E:** medium-severity finding when `activeConfig.claudeMd.estimatedTokens > 10_000` — flags cascades that bleed budget every turn.
+- **M2 — TOK Pattern F:** low-severity finding for project-local `SKILL.md` whose frontmatter `description` exceeds 500 characters (description loads on every turn even when the body does not). Scoped to `discovery.files`; user/plugin skills out of project scope are not flagged.
+- **M1 — MCP tool-count detection:** `readActiveMcpServers` now resolves tool count via cache → `node_modules/<pkg>/package.json` → `{toolCount: null, toolCountUnknown: true}` fallback. Tool count drives `estimateTokens` per server.
+- **M5 — HKV verbose hook output:** new low-severity finding when a referenced hook script contains > 50 `console.log` / `process.stdout.write` lines (static heuristic, no execution).
+- **F6 — `self-audit --check-readme` flag:** filesystem counts (scanners, commands, agents, hooks, tests, knowledge) compared against README badge values. Helper export: `checkReadmeBadges(pluginDir)`.
+
+### Changed
+- **TOK severities** (F7) — see Added. Posture aggregates that depended on Pattern A being `medium` will now reflect the higher-impact rating.
+- **`.gitignore`** — added unignore rules so `tests/fixtures/**/node_modules/` are tracked. Required by the `mcp-tool-heavy` fixture.
+
+### Tests
+- 563 → 586 (+23): F7 table-driven (×6), M6 (×3), M4 (×2), M2 (×2), M1 (×4), M5 (×2), F6 (×4).
+- New fixtures: `additional-dirs-many/`, `additional-dirs-ok/`, `large-cascade/`, `small-cascade/`, `skill-bloated/`, `skill-tight/`, `mcp-tool-heavy/` (with mocked `node_modules/`), `hooks-verbose/`, `hooks-quiet/`, `readme-desynced/`.
+
+### Notes
+- `result.readmeCheck.passed === true` is **not** required during alpha/beta phases. The real plugin's own check is currently red (`scanners` 10 vs README 9, `tests` 31 vs README 543) — reconciliation deferred to Session 5 Step 28 (README sync).
+- `[skip-docs]` tag used on every commit — README/CLAUDE.md badge counts and architecture text are intentionally fenced off until Session 5.
+
 ## [5.0.0-alpha.1] - 2026-05-01
 
 ### Summary