chore(release): config-audit v5.7.0 — optimization lens + living knowledge layer

Release-cut for v5.7 Fase 1 (Chunks 1/2a/2b/3):
- best-practices register (knowledge/best-practices.json)
- CA-OPT-001 deterministic optimization-lens scanner (count 14→15)
- /config-audit optimize + optimization-lens-agent (opus, agents 6→7)
- /config-audit knowledge-refresh (commands 19→20)

plugin.json 5.6.0→5.7.0, README version badge + version-history row,
CHANGELOG [5.7.0] entry. Count badges already track filesystem
(self-audit --check-readme: passed). Suite 1091 green (hermetic HOME),
self-audit A/A (config 94, plugin 100).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -6,7 +6,7 @@
 
 *AI-generated: all code produced by Claude Code through dialog-driven development. [Full disclosure →](../../README.md#ai-generated-code-disclosure)*
 
-![Version](https://img.shields.io/badge/version-5.6.0-blue)
+![Version](https://img.shields.io/badge/version-5.7.0-blue)
 ![Platform](https://img.shields.io/badge/platform-Claude_Code_Plugin-purple)
 ![Scanners](https://img.shields.io/badge/scanners-15-cyan)
 ![Commands](https://img.shields.io/badge/commands-20-green)
@@ -660,6 +660,7 @@ This plugin is cautious by design — configuration files are important, and a b
 
 | Version | Date | Highlights |
 |---------|------|-----------|
+| **5.7.0** | 2026-06-21 | "Optimization lens" — first detector of the «optimally shaped?» axis (vs «correct?»), plus a living knowledge layer. **Register:** `knowledge/best-practices.json`, a provenance-stamped, schema-validated best-practices register (first runtime-consumed `knowledge/` file). **OPT scanner (count 14→15):** `CA-OPT-001` (LOW) a ≥6-step CLAUDE.md procedure that would fit better as a skill, citing register entry `BP-MECH-003`. **`/config-audit optimize` + `optimization-lens-agent` (opus, agents 6→7):** prose-judgment lens for lifecycle→hook (`BP-MECH-001`), unscoped path→rule (`BP-MECH-002`), "never"→permission (`BP-MECH-004`); pre-filter recall + opus precision gate. **`/config-audit knowledge-refresh` (commands 19→20):** deterministic stale-check (injected reference date, 90-day cadence) + web re-verify/poll, human-approved writes only. Last two are agent/web-driven (not byte-stable). 1091 tests |
 | **5.6.0** | 2026-06-20 | "Steering-model II" — the load-pattern / compaction-survival model lands end-to-end. **Foundation:** `active-config-reader` now enumerates rules, agents, and output styles (alongside CLAUDE.md/plugins/skills/hooks/MCP), each tagged `loadPattern` (always / on-demand / external) + `survivesCompaction` from the published loading model; the frontmatter parser also reads YAML block sequences (`paths:` lists). **B (load-pattern accounting):** `manifest` reports component-level sources (the double-counting plugin roll-up is gone), tags every source with the load-pattern triple, and leads with an **always-loaded subtotal** ("tokens that enter context every turn"); `token-hotspots` annotates each ranked hotspot with its load pattern. **C (output styles):** new orchestrated **OST** scanner (count 13→**14**) — `CA-OST-001` a custom style stripping built-in coding instructions (missing `keep-coding-instructions: true`, V10), `CA-OST-002` a plugin style with `force-for-plugin: true` overriding the user's `outputStyle` (V11), `CA-OST-003` a settings `outputStyle` resolving to no known style (dead config). Doc-verified; frozen v5.0.0 snapshots preserved via strip-helpers, SC-5 regenerated. 1023 tests |
 | **5.5.0** | 2026-06-20 | "Steering-model I" — two additive compaction-durability / dead-config findings (count stays **13**, `--json`/`--raw` byte-stable). Per the official "what survives compaction" model: RUL flags a large (>50-line) **path-scoped** rule not re-injected after compaction (LOW); CML flags a **nested** (subdir) CLAUDE.md not re-injected after compaction (LOW). PLH flags a plugin agent setting `hooks`/`mcpServers`/`permissionMode` — Claude Code ignores these for plugin subagents, so it's dead config (`permissionMode` = MEDIUM false-security, `hooks`/`mcpServers` = LOW). Known limitation: the frontmatter parser reads inline `paths:` but not YAML block sequences (deferred to v5.6 Foundation). 961 tests |
 | **5.4.1** | 2026-06-20 | Scanner-correctness patch (count stays **13**, `--json`/`--raw` byte-stable). HKV: added `Setup`/`UserPromptExpansion`/`PostToolBatch` to the valid-event set (a valid hook using one was wrongly flagged "will never fire"), and **removed** `post-session` (the 2.1.169 `post-session` is a self-hosted-runner workspace-lifecycle hook, **not** a settings.json event — absent from `hooks.md`; verified 2026-06-20). RUL: globs-rule wording corrected — only `paths:` is documented, so the finding drops the unverified "deprecated/legacy" claim and steers to the documented field. PLH: optional `model`/`tools`/`name`/`allowed-tools` frontmatter no longer required; CLAUDE.md component-section required only for components the plugin actually ships. 954 tests |