feat: add trigger phrases to skill descriptions for better model matching (v0.6.4.1) (#169)

* feat: add trigger phrases to skill descriptions for better model matching

Anthropic's skill best practices: "the description field is not a summary —
it's when to trigger." Add explicit "Use when asked to..." phrases to 12 skill
descriptions so Claude's auto-discovery works with natural language requests
like "deploy this" or "check my diff", not just explicit /slash-commands.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* docs: add on-demand hooks and telemetry to TODOS.md

Captures two ideas from Anthropic's skill best practices post:
- /careful, /freeze, /guard on-demand hook skills (P3)
- Skill usage telemetry via preamble JSONL append (P3)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: bump version and changelog (v0.6.4.1)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* docs: exclude internal details from CHANGELOG style guide

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

plan-eng-review/SKILL.md

@@ -4,7 +4,8 @@ version: 1.0.0
 description: |
   Eng manager-mode plan review. Lock in the execution plan — architecture,
   data flow, diagrams, edge cases, test coverage, performance. Walks through
-  issues interactively with opinionated recommendations.
+  issues interactively with opinionated recommendations. Use when asked to
+  "review the architecture", "engineering review", or "lock in the plan".
 allowed-tools:
   - Read
   - Write

plan-eng-review/SKILL.md.tmpl

@@ -4,7 +4,8 @@ version: 1.0.0
 description: |
   Eng manager-mode plan review. Lock in the execution plan — architecture,
   data flow, diagrams, edge cases, test coverage, performance. Walks through
-  issues interactively with opinionated recommendations.
+  issues interactively with opinionated recommendations. Use when asked to
+  "review the architecture", "engineering review", or "lock in the plan".
 allowed-tools:
   - Read
   - Write