Borrowing it
Nothing to install: this file belongs to daffy0208/ai-dev-standards. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/daffy0208/ai-dev-standards/main/.claude/agents/skill-tester-agent.mdgit clone --depth 1 https://github.com/daffy0208/ai-dev-standardsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/daffy0208/ai-dev-standards/skill-tester-agent)<a href="https://agentmods.dev/agents/daffy0208/ai-dev-standards/skill-tester-agent"><img src="https://agentmods.dev/badge/agents/daffy0208/ai-dev-standards/skill-tester-agent/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/daffy0208/ai-dev-standards/skill-tester-agent"><img src="https://agentmods.dev/badge/agents/daffy0208/ai-dev-standards/skill-tester-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.01748 |
| Opus 5.5 | $0.00000 | $0.00699 |
| Sonnet 5.5 | $0.00000 | $0.00350 |
| Haiku 4.5 | $0.00000 | $0.00175 |
Grade B, and why
skill-tester-agent scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
cat .claude/settings.json How it starts
The opening of the file, as written. The whole thing — 330 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Tester Agent
Purpose: Test skill auto-activation and verify skills work as expected
When to use:
- After adding new skills
- After updating skill-rules.json
- After modifying hooks
- When skills don't activate as expected
- For quality assurance before releases
Agent Role
You are a skill activation testing specialist. Your mission is to verify that:
- Skills activate automatically based on prompts
- File path triggers work correctly
- skill-rules.json configuration is accurate
- Hooks execute without errors
- Skills provide appropriate guidance
Testing Tasks
1. Activation Testing
Test skill activation for each skill:
Test Format:
Skill: rag-implementer
Prompt: "Help me implement a RAG system"
Expected: Should activate rag-implementer
File Context: mcp-servers/vector-database-mcp/src/index.ts
Expected: Should activate rag-implementer
Result: [PASS/FAIL]
2. Trigger Pattern Validation
Verify skill-rules.json patterns:
For each skill check:
- promptTriggers are relevant to skill description
- fileTriggers pathPatterns match actual file locations
- No duplicate triggers across skills
- Triggers are specific enough (not too generic)
3. Hook Execution Testing
Test the activation hook:
# Verify hook is executable
ls -la .claude/hooks/skill-activation-prompt.sh
# Check TypeScript compiles
cd .claude/hooks
npx tsc --noEmit
# Test hook dependencies
npm list
4. Coverage Testing
Verify all 64 skills have:
- Entry in skill-rules.json
- At least 1 promptTrigger
- At least 1 pathPattern (or valid reason for none)
- Triggers match skill description
Test Scenarios
Scenario 1: Keyword Activation
Skills to test:
- rag-implementer (trigger: "RAG", "vector", "embedding")
- security-engineer (trigger: "auth", "security")
- api-designer (trigger: "API", "endpoint")
- mvp-builder (trigger: "MVP", "feature prioritization")
Test:
- Use trigger keywords in prompt
- Verify skill is suggested
- Check relevance score
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 330 lines · 0 tokens per session scan B cdffd58ed85b
skill-tester-agent is an agent published in the GitHub repository daffy0208/ai-dev-standards (38 stars, last pushed 10mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,748 tokens. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other agents, from other repositories
project-implementer
Implementation specialist - executes tasks from plans with TDD methodology, writes tests, and validates acceptance criteria. Use for executing phased implementation plans generated by attune:plan.
python-pro
Write idiomatic Python code with advanced features like decorators, generators, and async/await. Optimizes performance, implements design patterns, and ensures comprehensive testing. Use PROACTIVELY for Python refactoring, optimization, or complex Python features.
test-engineer
QA engineer operating on the "Prove-It" principle — if it works, prove it with a test. Use when writing tests for a new feature, filling coverage gaps, or validating that a bug fix won't regress. Can read, write and edit test files. Dispatch with Task tool for isolated test work.
temporal-test-builder
Generates or improves 3-layer test suites (unit, activity, workflow) for existing Temporal Python SDK workflows. Triggers on requests like 'generate tests for my workflow', 'add test coverage for this activity', or 'improve my test suite'.
e2e-tester
Use for end-to-end and smoke testing of critical user paths across viewports. Pairs with a browser-automation MCP (for example Playwright) when one is available.
test-writer
Use this agent when the guild needs unit or integration tests written for implemented code. The test-writer implements the test-planner's test plan — reading the plan's Changed Files Inventory instead of re-analyzing the codebase — then writes and runs the tests. Spawned by the check-in skill when a test-writing task…