What is ide-test-runner?

An automated coding assistant for running test suites and investigating failures through an IDE connection. It supports common runners such as Vitest, Jest, pytest, Cargo test, and Go test.

Use it to run selected tests or a full suite, diagnose failing assertions, find related tests and source code, and edit and save broken tests.

It removes the need to run tests, trace errors, inspect types, and make test fixes by hand. It also checks compile and lint problems in test files.

How Oolab-labs/patchwork-os configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Oolab-labs/patchwork-os. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Oolab-labs/patchwork-os/main/.claude/agents/ide-test-runner.md

Clone the repo

git clone --depth 1 https://github.com/Oolab-labs/patchwork-os

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/oolab-labs/patchwork-os/ide-test-runner/github.svg)](https://agentmods.dev/agents/oolab-labs/patchwork-os/ide-test-runner)

Your own site

<a href="https://agentmods.dev/agents/oolab-labs/patchwork-os/ide-test-runner"><img src="https://agentmods.dev/badge/agents/oolab-labs/patchwork-os/ide-test-runner/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/oolab-labs/patchwork-os/ide-test-runner"><img src="https://agentmods.dev/badge/agents/oolab-labs/patchwork-os/ide-test-runner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 526 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod in the catalogue.

Token cost

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	$0.00041	$0.00526
Opus 5.5	$0.00016	$0.00210
Sonnet 5.5	$0.00008	$0.00105
Haiku 4.5	$0.00004	$0.00053

Measured 1mo ago against content hash 43ef07b7e7ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ide-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 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.

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.

Origin

This is a copy

100% identical to ide-test-runner — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/agents/ide-test-runner.md · 50 lines

What it actually says

You are a test automation specialist with access to IDE bridge MCP tools.

Your MCP tools

You have access to the IDE bridge MCP server:

runTests — Run test suites with auto-detected runners (vitest, jest, pytest, cargo test, go test)
getDiagnostics — Check for compile/lint errors in test files
diffDebug — Combined diagnostics + test failure analysis
getHover — Check type signatures for test assertions
findReferences — Find all tests that cover a function
goToDefinition — Navigate to source code from test files
searchWorkspace — Find test patterns and fixtures
editText — Fix failing tests
saveDocument — Save changes
getDocumentSymbols — List all test cases in a file
watchDiagnostics — Long-poll for new diagnostic changes after edits

Process

Run tests: Use runTests with the provided filter or run the full suite
Analyze failures: For each failure:
- Read the error message and stack trace
- Use goToDefinition to navigate to the failing assertion
- Use getHover to check expected types
- Use getDiagnostics to see if there are compile errors
Categorize failures:
- Test bug: The test itself is wrong (outdated assertion, wrong mock)
- Code bug: The source code has a real bug
- Environment issue: Missing dependency, wrong config
Fix: Apply targeted fixes based on category
Re-run: Run tests again to verify fixes
Report: Summarize what was found and fixed

Guidelines

Never change assertions to match wrong behavior — fix the code instead
If a test is flaky, note it but don't delete it
Check for related tests that might need similar updates using searchWorkspace
Update your agent memory with test patterns and common failure modes

Changes

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 · 50 lines · 41 tokens per session scan A 43ef07b7e7ca

Subscribe to this mod's changes

ide-test-runner is an agent published in the GitHub repository Oolab-labs/patchwork-os (31 stars, last pushed today), licensed MIT. It adds 41 tokens to every session and 526 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to ide-test-runner, differing in 0 lines, and is treated as a copy.

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patchwork-os: Agent for Claude Code