Merge origin/main into /spec branch — retag v1.45.0.0 → v1.47.0.0

main moved to v1.46.0.0 (gstack v2 foundation, eval-first floor across
51 skills) while this branch was at v1.45.0.0. v1.46 also reserved
v1.45.0.0 for the design daemon feature. Retag this branch's release
v1.45.0.0 → v1.47.0.0 so it lands cleanly on top of main.

Conflict resolutions:
- VERSION: 1.47.0.0 (MINOR continues on top of main's 1.46.0.0; this
  branch is also a MINOR per scale-aware rules — new skill capability).
- CHANGELOG: rewrite this branch's release header v1.45.0.0 → v1.47.0.0.
  Keep both main entries above main's older history.

Adapts to main's eval-first floor (v1.46.0.0 test/skill-coverage-matrix.ts
+ test/skill-coverage-floor.test.ts):
- Register /spec in SKILL_COVERAGE with 3 gate entries + 2 periodic.
- Skill catalog grows 51 → 52. Floor 6/6 structural checks pass.
- Catalog tokens: 4045 → 4116 (+71 for /spec, within v1.46's ≤7000 budget).
- Trim spec frontmatter description to single-paragraph block form to
  respect v1.46's catalog-trim intent (was 14 lines / ~900 chars,
  now 5 lines / ~350 chars; routing prose stays in body sections).
- 363/363 gate-tier tests pass across skill-coverage-floor (309) +
  skill-coverage-matrix (10) + skill-size-budget (3) + parity-suite (4) +
  spec-template-invariants (35) + spec-template-sync (2).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

benchmark/SKILL.md

@@ -2,13 +2,7 @@
 name: benchmark
 preamble-tier: 1
 version: 1.0.0
-description: |
-  Performance regression detection using the browse daemon. Establishes
-  baselines for page load times, Core Web Vitals, and resource sizes.
-  Compares before/after on every PR. Tracks performance trends over time.
-  Use when: "performance", "benchmark", "page speed", "lighthouse", "web vitals",
-  "bundle size", "load time". (gstack)
-  Voice triggers (speech-to-text aliases): "speed test", "check performance".
+description: Performance regression detection using the browse daemon. (gstack)
 triggers:
   - performance benchmark
   - check page speed
@@ -23,6 +17,17 @@ allowed-tools:
 <!-- AUTO-GENERATED from SKILL.md.tmpl — do not edit directly -->
 <!-- Regenerate: bun run gen:skill-docs -->
 
+
+## When to invoke this skill
+
+Establishes
+baselines for page load times, Core Web Vitals, and resource sizes.
+Compares before/after on every PR. Tracks performance trends over time.
+Use when: "performance", "benchmark", "page speed", "lighthouse", "web vitals",
+"bundle size", "load time".
+
+Voice triggers (speech-to-text aliases): "speed test", "check performance".
+
 ## Preamble (run first)
 
 ```bash