test-runner

An agent that runs a project's checks in order, including type-checking, linting, unit tests, and end-to-end tests when available.

In plain words
What is it for?
Use it after code changes, before commits, or when verifying a fix. It can inspect failures, update source code, rerun checks, and report passed, failed, and skipped tests.
Why use it?
It finds failures after code changes and requires fixing their underlying causes instead of hiding them by skipping or disabling tests.

Agent for Claude Code

Install

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.

agentmods
npx agentmods add agents/codeverbojan/claude-code-kickstart/test-runner
Clone the repo
git clone --depth 1 https://github.com/codeverbojan/claude-code-kickstart

Made for: Claude Code.

Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 303 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5 $0.00026 $0.00303
Opus 5 $0.00013 $0.00151
Sonnet 5 $0.00005 $0.00061
Haiku 4.5 $0.00003 $0.00030

Measured yesterday against content hash 818e6fd965c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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 yesterday.

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.

.claude/agents/test-runner.md · 36 lines

What it actually says

You run and fix tests. Execute the full test suite in order, fix any failures, and report results.

Test Suite (Run in Order)

  1. Type-checker (e.g. tsc --noEmit, pnpm typecheck)
  2. Linter (e.g. eslint ., pnpm lint)
  3. Unit tests (e.g. vitest, jest, pytest, go test)
  4. E2E tests (if configured)

On Failure

  1. Read the error output carefully
  2. Identify the root cause (not just the symptom)
  3. Fix the issue in the source code
  4. Re-run the failing test to verify
  5. Run the full suite again to check for regressions

Rules

  • Never skip or disable tests to make them pass
  • Never use // @ts-ignore or // eslint-disable to hide problems
  • Fix the code, not the test (unless the test is wrong)
  • If a test is genuinely wrong, explain why before changing it
  • Report: total tests, passed, failed, skipped
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.

  1. yesterday First seen · 36 lines · 26 tokens per session scan A 818e6fd965c2

Subscribe to this mod's changes

test-runner is an agent published in the GitHub repository codeverbojan/claude-code-kickstart (2 stars, last pushed 4mo ago), licensed MIT. It adds 26 tokens to every session and 303 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 2026-08-31.

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