feat(acr,yaml): v5.6 Foundation — load-pattern enumeration + block-seq parser

Foundation chunk of v5.6 "steering-model II" (internal plumbing for B/C;
no command-output change, so --json/--raw/SC-5/6/7 stay byte-stable, count
stays 13).

active-config-reader.mjs:
- deriveLoadPattern(kind,{scoped}) — pure helper mapping each source kind to
  loadPattern {always,on-demand,external} + survivesCompaction {yes,no,n/a}
  + derivationConfidence {confirmed,inferred}, traced to the published
  loading model (V-rows in docs/v5.5-steering-model-plan.md).
- enumerateRules / enumerateAgents / enumerateOutputStyles — the three
  source kinds previously unenumerated (mirror enumerateSkills). Output-style
  discovery is direct (not a new file-discovery type) to keep the discovery
  surface stable.
- readActiveConfig now exposes rules/agents/outputStyles arrays + totals
  counts/subtotals (folded into grandTotal).

yaml-parser.mjs:
- parseSimpleYaml now reads YAML block sequences (paths:\n  - a), not just
  inline paths:. An empty-valued key with no `- ` items stays null
  (backcompat). Resolves a pre-existing RUL false-positive (a block-seq-scoped
  rule was misread as unscoped) — fix flows through unchanged RUL code.

Tests +35 (961 -> 996): block-seq parser cases, RUL block-seq regression
(no-misflag + durability-fires), deriveLoadPattern table, three enumerators
(positive+negative). Amended two existing ACR asserts (top-level key shape +
grandTotal sum). self-audit A/A, readmeCheck passed, mismatches []. tests
badge 961+->996+; README testing prose de-staled (635/36 -> 996/56);
CLAUDE.md Foundation note.

B (manifest/tokens render + snapshot regen) and C (CA-OST, count->14)
deferred to their own sessions/GO.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ter3E2JSi1Khgmuf2kady8

README.md

@@ -12,7 +12,7 @@
 ![Commands](https://img.shields.io/badge/commands-18-green)
 ![Agents](https://img.shields.io/badge/agents-6-orange)
 ![Hooks](https://img.shields.io/badge/hooks-4-red)
-![Tests](https://img.shields.io/badge/tests-961+-brightgreen)
+![Tests](https://img.shields.io/badge/tests-996+-brightgreen)
 ![License](https://img.shields.io/badge/license-MIT-lightgrey)
 
 A Claude Code plugin that checks configuration health, suggests context-aware improvements, and auto-fixes issues — `CLAUDE.md`, `settings.json`, hooks, rules, MCP servers, `@imports`, and plugins. 13 deterministic scanners across 10 quality areas, context-aware feature recommendations, auto-fix with backup/rollback, a prompt-cache-aware Token Hotspots scanner with optional API-calibrated `--accurate-tokens` mode, plus cache-prefix stability, dead-tool, and cross-plugin collision detection. Zero external dependencies.
@@ -588,7 +588,7 @@ Reference documents that inform the feature-gap agent and context-aware recommen
 node --test 'tests/**/*.test.mjs'
 ```
 
-635 tests across 36 test files (12 lib + 23 scanner + 1 hook). Test fixtures in `tests/fixtures/`. Requires Node.js 18+ (`node:test`).
+996 tests across 56 test files (17 lib + 29 scanner + 1 hook + 1 agent + 3 commands + 1 knowledge + 4 top-level). Test fixtures in `tests/fixtures/`. Requires Node.js 18+ (`node:test`).
 
 ---