test-runner

A test-running agent used after source files in src/ are changed. It runs the test suite and reports passed or failed tests.

In plain words
What is it for?
Running pnpm test after source edits, counting passing tests, and explaining each failure without modifying the code.
Why use it?
It checks whether code changes broke existing behavior while keeping diagnosis separate from code fixes.

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/laat/mor/test-runner
Clone the repo
git clone --depth 1 https://github.com/laat/mor

Made for: Claude Code.

Per session 27 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 159 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 $0.00027 $0.00159
Opus 5 $0.00014 $0.00079
Sonnet 5 $0.00005 $0.00032
Haiku 4.5 $0.00003 $0.00016

Measured yesterday against content hash 986a1eb7f7de, 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 · 22 lines

What it actually says

Run the test suite and report results concisely.

Steps

  1. Run pnpm test and capture the output
  2. If all tests pass, report the count (e.g. "16 files, 275 tests passed")
  3. If tests fail:
    • List each failing test name and file
    • Read the relevant test and source files to understand the failure
    • Provide a brief explanation of why each test failed
    • Do NOT fix the code — only diagnose and report
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 · 22 lines · 27 tokens per session scan A 986a1eb7f7de

Subscribe to this mod's changes

test-runner is an agent published in the GitHub repository laat/mor (2 stars, last pushed yesterday), licensed MIT. It adds 27 tokens to every session and 159 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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