Add skill-tester skill for validation

skills/meta/skill-tester.md

@@ -0,0 +1,55 @@
+---
+name: skill-tester
+description: Use when validating a skill before deployment. Tests skill behavior with subagent simulations to find edge cases and rationalization loopholes.
+category: meta
+token_budget: 1500
+---
+
+# Skill: Test Skills with Subagents
+
+## Overview
+Every skill must be tested before deployment. The Iron Law: **No skill ships without a failing test first.**
+
+## Testing Protocol
+
+### Phase 1: Baseline (No Skill)
+1. Run a subagent WITHOUT the skill loaded
+2. Give it a scenario where the skill SHOULD be used
+3. Document what the subagent does wrong
+4. This establishes the "before" behavior
+
+### Phase 2: Apply Skill
+1. Run subagent WITH the skill loaded
+2. Same scenario as Phase 1
+3. Verify the skill changes behavior correctly
+4. Document improvements
+
+### Phase 3: Edge Cases
+Test these rationalization patterns:
+- "I already know how to do this"
+- "This situation is different"
+- "It would be faster to just..."
+- "The user probably meant..."
+
+### Phase 4: Adversarial
+Attempt to make the skill fail:
+- Ambiguous inputs
+- Conflicting requirements
+- Time pressure scenarios
+- Partial information
+
+## Output Format
+```json
+{
+  "skill_name": "...",
+  "test_date": "YYYY-MM-DD",
+  "baseline_failures": ["..."],
+  "improvements": ["..."],
+  "edge_cases_passed": N,
+  "edge_cases_failed": N,
+  "recommendations": ["..."],
+  "verdict": "ship|iterate|reject"
+}
+```
+
+## Token Budget: 1500 tokens max