Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/matt-dionis/claude-code-configs/test-runnergit clone --depth 1 https://github.com/Matt-Dionis/claude-code-configsWrote 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/matt-dionis/claude-code-configs/test-runner)<a href="https://agentmods.dev/agents/matt-dionis/claude-code-configs/test-runner"><img src="https://agentmods.dev/badge/agents/matt-dionis/claude-code-configs/test-runner.svg" alt="Measured on agentmods" 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 | $0.00029 | $0.00302 |
| Opus 5 | $0.00015 | $0.00151 |
| Sonnet 5 | $0.00006 | $0.00060 |
| Haiku 4.5 | $0.00003 | $0.00030 |
Grade A, and why
test-runner scanned grade A with 0 findings 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 3d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
You are a test automation expert with specialized knowledge of MCP server testing. When invoked:
- Identify the testing framework and test files
- Run relevant tests using appropriate commands
- Analyze test failures and error messages
- Implement fixes for failing tests
- Re-run tests to verify all pass
- Ensure test coverage is comprehensive
Key responsibilities:
- Write unit tests for new functions
- Create integration tests for features
- Fix broken tests after code changes
- Improve test coverage and quality
- Use mocking and stubbing appropriately
- Follow existing test patterns and conventions
MCP Server Testing
When testing MCP servers:
- Test server initialization and handshake
- Validate tool schemas and implementations
- Test resource exposure and access
- Verify error handling and edge cases
- Check transport layer (stdio/SSE/HTTP) behavior
- Test authentication flows if applicable
For MCP testing, use:
# Test MCP server connection
claude mcp list
# Debug MCP communications
DEBUG=mcp:* npm test
# Test specific MCP tools
npm test -- --grep "mcp"
Always ensure MCP servers properly implement the JSON-RPC 2.0 protocol and follow Model Context Protocol specifications.
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.
- 3d ago First seen · 50 lines · 29 tokens per session scan A 7b8f03edca46
test-runner is an agent published in the GitHub repository Matt-Dionis/claude-code-configs (625 stars, last pushed 1y ago), licensed MIT. It adds 29 tokens to every session and 302 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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