A test-command wrapper that runs a project's existing test tool, such as pytest, Jest, or Go test, and converts its result into a standard exit status.

It helps detect or load test-runner settings, execute tests in a target directory, and report whether they passed or failed.

It gives the tester one interface for different projects and supports project-specific test commands when needed.

test-runner — Skill for Claude Code and Codex by cintia09/CodeNook

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.

Any agent

npx skills add cintia09/CodeNook --skill test-runner

Clone the repo

git clone --depth 1 https://github.com/cintia09/CodeNook

Made for: Claude Code, Codex.

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/skills/cintia09/codenook/test-runner/github.svg)](https://agentmods.dev/skills/cintia09/codenook/test-runner)

Your own site

<a href="https://agentmods.dev/skills/cintia09/codenook/test-runner"><img src="https://agentmods.dev/badge/skills/cintia09/codenook/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/skills/cintia09/codenook/test-runner"><img src="https://agentmods.dev/badge/skills/cintia09/codenook/test-runner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 3 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,329 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00003	$0.01329
Opus 5.5	$0.00001	$0.00532
Sonnet 5.5	$0.00001	$0.00266
Haiku 4.5	$0.00000	$0.00133

Measured 2mo ago against content hash 476f3f7c5202, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

test-runner scanned grade A 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 2mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (runner.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

`subprocess.run(..., shell=True)` inside the target directory. The

plugins/development/skills/test-runner/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

test-runner — plugin-shipped skill (development plugin)

Role

Wrap the workspace's actual test runner (pytest / jest / go test) so the tester role can issue a single command and parse a single exit code.

CLI

runner.py --target-dir <dir> [--config <path>] [--json]

--config is optional; when supplied, it overrides the marker detection and runs whatever command the config file defines (see Memory-first lookup, below).

Three-tier resolution (memory-first, ask-second)

Security / threat model

--config <path> is executed as a Python module (via runpy.run_path); the module-level TEST_CMD is then executed via subprocess.run(..., shell=True) inside the target directory. The Python execution gives the config full host privileges (it can import os; os.system(...) etc.) before any test even starts. This is intentional — the memory-first pattern needs full flexibility to wrap arbitrary test runners (pytest selectors, custom wrappers, env-var preludes, SSH-into-DUT, etc.). Consequences:

The caller is responsible for trust. Only point --config at: (a) a workspace-memory entry under .codenook/memory/knowledge/ that a human author wrote / reviewed; OR (b) a snippet just pasted by the current user via HITL.
Never load a --config file fetched over the network without human review first.
The skill makes no attempt to sandbox the config or the test runner — anything Python (and shell=True) can do, the config can do.
Memory entries shipped by plugins (under .codenook/plugins/<id>/) are not auto-trusted; they reach --config only after a human promotes the embedded snippet to a memory file.

This skill is environment-agnostic: it does not know about ADB, QEMU, SSH-into-board, JTAG, etc. Instead, it follows a three-tier resolution that lets the workspace's memory describe the target, with the user as the ultimate fallback:

Marker detection inside <target-dir> (legacy v0.3 behaviour). If the directory contains pyproject.toml / setup.py / pytest.ini / tox.ini → run pytest. package.json → npm test. go.mod → go test ./.... This is the fast path for pure-software targets.

Read the full file on GitHub · 131 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

runner.py 7.5 KB runs code

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.

2mo ago First seen · 131 lines · 3 tokens per session scan A 476f3f7c5202

Subscribe to this mod's changes

test-runner is a skill published in the GitHub repository cintia09/CodeNook (5 stars, last pushed 1mo ago), licensed MIT. It adds 3 tokens to every session and 1,329 once invoked, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Testing development plugin-shipped skill test runner

test-runner next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
test-runnercintia09/CodeNook	Skill	5	1mo ago	MIT	A	3	Claude Code, Codex
incident-response-skillagentfront/frontmcp	Skill	148	today	Apache-2.0	A	24	Claude Code, Codex
directory-based-skillagentfront/frontmcp	Skill	148	today	Apache-2.0	A	28	Claude Code, Codex
parameterized-skillagentfront/frontmcp	Skill	148	today	Apache-2.0	A	21	Claude Code, Codex
basic-inline-skillagentfront/frontmcp	Skill	148	today	Apache-2.0	A	19	Claude Code, Codex
project-scaffoldchainlesschain/chainlesschain	Skill	11	today	none	A	25	Claude Code
git-bisect-autoJansenAnalytics/claudex	Skill	5	4mo ago	MIT	A	40	Claude Code, Codex

test-runner