A procedure for rerunning automated checks that test how skills load in several coding-agent command-line tools. It compares the new results with the previous run and publishes the changes.

Use it to test skill loading in Antigravity CLI, Claude Code, Codex CLI, and Copilot CLI, then review and publish the differences.

It helps detect whether a new tool release or repository change has altered skill-loading behavior.

run-checks — Skill for Claude Code by agent-ecosystem

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 agent-ecosystem/agent-skill-implementation --skill run-checks

Clone the repo

git clone --depth 1 https://github.com/agent-ecosystem/agent-skill-implementation

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/skills/agent-ecosystem/agent-skill-implementation/run-checks/github.svg)](https://agentmods.dev/skills/agent-ecosystem/agent-skill-implementation/run-checks)

Your own site

<a href="https://agentmods.dev/skills/agent-ecosystem/agent-skill-implementation/run-checks"><img src="https://agentmods.dev/badge/skills/agent-ecosystem/agent-skill-implementation/run-checks/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/agent-ecosystem/agent-skill-implementation/run-checks"><img src="https://agentmods.dev/badge/skills/agent-ecosystem/agent-skill-implementation/run-checks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,038 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 unknown 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	$0.00105	$0.01038
Opus 5.5	$0.00042	$0.00415
Sonnet 5.5	$0.00021	$0.00208
Haiku 4.5	$0.00011	$0.00104

Measured 7d ago against content hash 4d6601a7c552, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

run-checks 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 7d 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.

.claude/skills/run-checks/SKILL.md · 94 lines

The source is not reproduced here

Licensed CC-BY-4.0

The repository is licensed CC-BY-4.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

7d ago First seen · 94 lines · 105 tokens per session scan A 4d6601a7c552

Subscribe to this mod's changes

run-checks is a skill published in the GitHub repository agent-ecosystem/agent-skill-implementation (6 stars, last pushed 7d ago), licensed CC-BY-4.0. It adds 105 tokens to every session and 1,038 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-11-02.

Testing agent-skills agent-skills-spec agent-skills-standard agent-testing ai-agents antigravity

run-checks next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
run-checksagent-ecosystem/agent-skill-implementation	Skill	6	7d ago	CC-BY-4.0	A	105	Claude Code
review-skillagent-ecosystem/skill-validator	Skill	265	21d ago	MIT	A	67	Claude Code, Codex
anti-slop-designsickn33/agentic-awesome-skills	Skill	49k	2d ago	MIT	A	34	Claude Code
architecture-decision-recordssickn33/agentic-awesome-skills	Skill	49k	2d ago	MIT	A	34	Claude Code
agent-harness-fault-injectionsickn33/agentic-awesome-skills	Skill	49k	2d ago	MIT	A	34	Claude Code
ariasickn33/agentic-awesome-skills	Skill	49k	2d ago	MIT	A	18	Claude Code
autonomous-agent-patternssickn33/agentic-awesome-skills	Skill	49k	2d ago	MIT	A	46	Claude Code