Star200+

CoalMine

REVIEW · 62
Community indexed

Nine quality-canary skills for AI coding agents - code health, world-class rule completeness, grounding, supply chain, resilience, drift & more - plus the auto-cadence hooks that run them unprompted at session start and session end. Cross-agent, consent-gated, token-lean.

Verified installs0
Stars11
Version1.0.0
Quality69/100 · Promising
Trust62/100 · Sandbox only
Audit78/100 · Needs review

Supply asset profile

Coding and developer agents

Code review, repo analysis, testing, CI, GitHub, DevOps, and developer workflow skills.

Browse track

Scenario

GitHub automation

I need my agent to triage GitHub issues, review pull requests, and summarize repository changes.

Agent fit

Claude Code + OpenAI Agents + Cursor

Codex, Claude Code, Cursor, CLI, or custom agents.

Install

Ready

npx skills add HetCreep/CoalMine

Maintenance

fresh

14d since push

Risk

Needs review

Dependency or permission surface needs review

GitHub quality

11

69/100 Quality · 70/100 Trust

Coverage tags

CodingGitHub automationcoding-agentscode-qualityagent-skills

Review notes

Dependency or permission surface needs review · Permission surface may require sandboxing

Agent adoption scorecard

Trust, audit, and install readiness at a glance

These scores combine public repository metadata, OpenAgentSkill review signals, maintenance freshness, and install readiness. They are a shortlist signal, not a replacement for human review.

Quality

Promising
69

Useful candidate, but compare it with alternatives before adopting.

Trust

Sandbox only
62

Useful candidate with missing or mixed trust signals. Keep it in an isolated workspace until the outcome loop proves task fit.

Audit

Needs review
78

A machine-readable review of install readiness, security metadata, maintenance, and adoption risk.

OpenAgentSkill Trust Score v5

Human review before install

Run only in a sandbox and compare close alternatives before using it for real work.

JavaScriptCodexClaude CodeCursorOpenAgentSkill CLI

Stars

11 GitHub stars

Repo activity

11 stars, 2 forks

Maintenance

14d since push

License

Apache-2.0

Install

npx skills add HetCreep/CoalMine

Install safety

standard package or runtime install path

Permission surface

secrets or environment access, shell or command execution

Agent outcomes

No agent outcome data yet

Docs

Strong README/SKILL.md context

Risk summary

Review before production

  • Low GitHub adoption signal
  • Quality score needs review
  • Permission surface needs review: secrets or environment access, shell or command execution
  • GitHub adoption: 11 GitHub stars

Install readiness

Install path available

  • Install path is available
  • Repository evidence is available
  • License is declared
  • No Agent Proven outcome evidence yet

Agent-readable metadata

Machine-readable decision data for this skill.

Use this block or the embedded JSON to decide whether an agent should install this skill, choose an alternative, or ask for human review first.

Open JSON

Suited tasks

  • GitHub automation workflows
  • Claude Code teams
  • builders willing to evaluate younger projects
  • Inspect repository metadata

Suited agents

JavaScriptCodexClaude CodeCursorOpenAgentSkill CLIOpenAI AgentsCLI

Install decision

Command
npx skills add HetCreep/CoalMine
Policy
block
Human review
yes

Trust and risk

Trust
62/100
Audit
78/100
Risk level
Needs review

Outcome loop

Endpoint
/api/agent/outcome
Event ID
resolve
Outcomes
5

Install command

npx skills add HetCreep/CoalMine
Public auditEval reportResolve APIInstall handoff

Do not use when

  • teams that need a vendor-supported SLA
  • production agents without a repository review
  • Low GitHub adoption signal
  • High-risk permission hints: Shell or command execution, Secrets or environment access
  • Dependency or permission surface needs review

Alternative

Code Review

168.6K Stars

npx skills add mattpocock/skills --skill code-review

Alternative

Grill With Docs

164.7K Stars

npx skills add mattpocock/skills --skill grill-with-docs

Alternative

To Spec

164.7K Stars

npx skills add mattpocock/skills --skill to-spec

Alternative

To Tickets

176.7K Stars

npx skills add mattpocock/skills --skill to-tickets

Agent safety v2

42/100 · Avoid automatic install

Blocked for auto-installblock

This skill should not be selected by an agent without explicit human security review.

Do not auto-install. Inspect the source, dependencies, and permission surface first.

Resolve via API

high

Shell or command execution

Skill metadata references terminal, CLI, shell, subprocess, or command execution workflows.

medium

Network access

Skill likely fetches remote pages, APIs, repositories, or external services.

high

Secrets or environment access

Skill metadata references credentials, tokens, environment variables, or secret-bearing workflows.

  • High-risk permission hints: Shell or command execution, Secrets or environment access
  • Dependency or permission surface needs review

Install targets

Install this skill in your agent workflow

Use the public install endpoint to fetch the command, safety checklist, target prompts, and canonical links for this skill.

skill install

OpenAgentSkill CLI

Resolve policy, run the source installer safely, and report a verified install receipt.

$ npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.2.1/openagentskill-0.2.1.tgz install hetcreep-coalmine

Agent resolve plan

Let an agent verify fit before installing.

The Resolve API returns the selected skill, alternatives, safety policy, audit notes, install target, and copy-paste prompt an agent can follow without scraping this page.

Open text plan

Open JSON

/api/agent/resolve?task=Use%20CoalMine%20for%20an%20agent%20workflow&agent=codex&max_risk=medium

Resolve text

/api/agent/resolve?task=Use%20CoalMine%20for%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text

Install handoff

/api/skills/hetcreep-coalmine/install

Agent should check

  • Task fit and alternatives from Resolve API.
  • Audit score, trust score, and safety policy warnings.
  • Install target compatibility for Codex, Claude Code, Cursor, or CLI.

Copy prompt

Task: Use CoalMine in this workspace.
Resolve first: https://www.openagentskill.com/api/agent/resolve?task=Use%20CoalMine%20for%20an%20agent%20workflow&agent=codex&max_risk=medium
Review install handoff: https://www.openagentskill.com/api/skills/hetcreep-coalmine/install
Install command: npx skills add HetCreep/CoalMine
Before running it, summarize audit warnings, required permissions, and the fallback skill if install is risky.

Agent handoff

Give an agent the install path, not another directory page.

Use the public install endpoint to fetch the command, safety checklist, target prompts, and canonical links for this skill.

Open install API

Install handoff

/api/skills/hetcreep-coalmine/install

LLM text format

/api/skills/hetcreep-coalmine/install?format=text

Find alternatives

/api/skills/search?q=CoalMine&limit=3

Agent prompt

Use CoalMine for this task. Review https://www.openagentskill.com/api/skills/hetcreep-coalmine/install, then install with: npx skills add HetCreep/CoalMine

Registry metadata

Agent-readable profile for automatic skill selection.

This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.

Open manifest

Manifest

/api/registry/manifest/hetcreep-coalmine

LLM text

/api/registry/manifest/hetcreep-coalmine?format=text

Install alias

/api/registry/install/hetcreep-coalmine

Recommend

/api/registry/recommend?task=Use%20CoalMine%20in%20an%20agent%20workflow&limit=3

Agent fit

70/100

GitHub automation

Use-case tags

GitHub automationCoding agentsLegal and compliance

Platforms

JavaScript, Claude Code, OpenAI Agents, Cursor

Audit report

Needs review · 78/100

A machine-readable review of install readiness, security metadata, maintenance, and adoption risk.

View audit reportView eval report

Agent decision cockpit

Fallback candidate for GitHub automation

Prototype with this skill first; keep a fallback candidate ready.

70
Readiness
Prototype
Stage

Role in stack

Fallback candidate

Primary fit

GitHub automation

Trust label

Prototype first

Install path

Command ready

Use when

  • GitHub automation workflows
  • Claude Code teams
  • builders willing to evaluate younger projects

Evidence

  • recent repository activity
  • install command or GitHub repo available
  • 69/100 quality profile
  • 4 OpenAgentSkill engagement events

review first

  • Low GitHub adoption signal

Implementation path

  1. 1Install it in a sandbox agent and run one GitHub automation task end to end.
  2. 2Compare output quality, latency, and failure behavior against at least one alternative.
  3. 3Promote it into production only after reviewing repository permissions, license, and maintenance signals.

Trust profile

Sandbox only

Useful candidate with missing or mixed trust signals. Keep it in an isolated workspace until the outcome loop proves task fit.

62
OpenAgentSkill Trust Score

GitHub adoption

FIX

11 GitHub stars

Stars/forks activity

FIX

11 stars, 2 forks; issue activity unavailable in current metadata

Recent maintenance

PASS

14d since push

License clarity

PASS

Apache-2.0

Good signals

  • AI review approved
  • Install path is available
  • Repository evidence is available
  • Recently maintained repository
  • Install command has no obvious high-risk pattern
  • Outcome loop is ready but needs first real agent run

Review before install

  • Low GitHub adoption signal
  • Quality score needs review
  • Permission surface needs review: secrets or environment access, shell or command execution
  • GitHub adoption: 11 GitHub stars
  • Stars/forks activity: 11 stars, 2 forks; issue activity unavailable in current metadata
  • Dependency/runtime risk: command execution surface, credential or environment access
  • Permission surface: secrets or environment access, shell or command execution
  • No real agent outcome reports yet
  • Human review required before unattended installation

Recommended action

Run only in a sandbox and compare close alternatives before using it for real work.

Quality profile

Promising candidate for agent workflows

Useful candidate, but compare it with alternatives before adopting.

69
GitHub stars
11
Freshness
14d ago
Install ready
Yes
License
Apache-2.0
Review before install: Low GitHub adoption signal

Workflow fit

Use this skill in these scenarios

Manage repositories

GitHub automation

I need my agent to triage GitHub issues, review pull requests, and summarize repository changes.

Build and ship code

Coding agents

I need a coding agent that can understand a repository, edit code, and review pull requests.

Review risk

Legal and compliance

I need my agent to review contracts, privacy policies, or compliance documents and summarize risks.

Workflow fit

Add it to a complete workflow

Inspect, patch, and verify code

Coding review agent

A workflow for software agents that inspect repositories, review pull requests, generate tests, and turn findings into shippable patches.

Design, build, test, and ship interfaces

Frontend and UI

A practical workflow for agents that turn product briefs or Figma designs into polished frontend code, review the result, test it in a browser, and prepare a safe deployment.

Turn skills into distribution

Content growth agent

A workflow for turning newly indexed skills into SEO briefs, social drafts, comparison pages, and reusable publishing workflows.

Alternative shortlist

Compare before you install

Similar skills that may fit this task.

Compare all

Code Review

Review a branch or diff against repository standards and the originating spec in two independent analysis passes.

Adopt
Ready100
Quality100
Stars168.6K

Grill With Docs

A relentless interview that pressure-tests a plan against the codebase, sharpens domain language, and updates CONTEXT.md and ADRs when decisions become durable.

Adopt
Ready100
Quality100
Stars164.7K

To Spec

Turn the current conversation and codebase context into a structured implementation spec, then publish it to the configured project issue tracker.

Adopt
Ready100
Quality100
Stars164.7K

To Tickets

Break a plan, spec, or conversation into independently actionable tracer-bullet tickets with explicit blocking relationships.

Adopt
Ready100
Quality100
Stars176.7K

Overview

<div align="center">

# 🐤 CoalMine

> *A mine's canary dies first so the miners live — these nine die first so your codebase lives.*

**9 Quality-Safeguard Canaries for AI Coding Agents** — Detect code rot, weak rules, hallucinations, supply-chain vulnerabilities, brittle architectures, and API contract drift before they pollute your codebase.

![version](https://img.shields.io/github/v/tag/HetCreep/CoalMine?label=version&color=blue) ![license](https://img.shields.io/badge/license-Apache_2.0-blue) ![status](https://img.shields.io/badge/status-live-brightgreen) ![SKILL.md](https://img.shields.io/badge/SKILL.md-open_standard_·_major_agents-success) ![skills](https://img.shields.io/badge/skills-9-success)

![Claude Code](https://img.shields.io/badge/Claude_Code-validated-brightgreen) ![Antigravity](https://img.shields.io/badge/Antigravity-validated_canaries_·_primed_auto--cadence-brightgreen) ![Cursor](https://img.shields.io/badge/Cursor-works_with-blue) ![Codex](https://img.shields.io/badge/Codex-works_with-blue) ![Gemini CLI](https://img.shields.io/badge/Gemini_CLI-works_with-blue) ![Cline](https://img.shields.io/badge/Cline-works_with-blue) ![Copilot](https://img.shields.io/badge/Copilot-works_with-blue) ![claude.ai](https://img.shields.io/badge/claude.ai-works_with-blue)

[Design Principles](https://github.com/TheColliery/.github/blob/main/DESIGN-PRINCIPLES.md) · [Benchmark](https://github.com/TheColliery/.github/tree/main/benchmarks/CoalMine) · [Contributing](CONTRIBUTING.md) · [Changelog](CHANGELOG.md) · [Security](SECURITY.md) · [Privacy](PRIVACY.md) · [Releases](https://github.com/HetCreep/CoalMine/releases)

**Part of [TheColliery](https://github.com/TheColliery)** — siblings: **[CoalTipple](https://github.com/TheColliery/CoalTipple)** (model/effort routing) · **[CoalBoard](https://github.com/TheColliery/CoalBoard)** (consensus & debate board) · **[CoalHearth](https://github.com/TheColliery/CoalHearth)** (session warm-resume) · **[CoalFace](https://github.com

Platform compatibility

javascriptFULL

Technical details

Version
1.0.0
License
Apache-2.0
Last updated
Aug 18, 2026
Published
Aug 8, 2026

Frameworks & tools

JavaScript

Decision snapshot

Fallback candidate

70
Ready
Prototype
Stage

recent repository activity

Audit

Install review

Install and adoption review

78
Needs review
Security
77/100
Maintenance
100/100
Install
92/100
Open full auditView eval report

Agent-proven evidence

Agent-proven evidence

Outcome reports after resolve, review, install, and one narrow run.

0
Proven
Needs first agent runAuto-install: review firstLast: Unknown
Success rate
—
Recent failure
—
Outcomes
0
Output quality
—
Failed
0
Not relevant
0
Installs
0
Risk blocked
0
Setup needed
0
Production
0

No agent outcome data yet. The first agent run can report success, setup needs, risk blocks, failure, or not-relevant through /api/agent/outcome.

Agent-Proven rankingOutcome contract

Install

Add to agent workflow

Free and open source. Review the report before installing into production agents.

Compare AlternativesAuto-resolve PlanView on GitHubDocumentation

Growth loop

Share kit

X

Scenario-led draft for CoalMine, ready for a manual X post.

Curator note
A practical pick for the next repo task:

CoalMine: Nine quality-canary skills for AI coding agents covering code health, rule completeness, grounding, supply chain, resilienc...

11 stars

https://www.openagentskill.com/skills/hetcreep-coalmine?ref=x
Open X draft
Optional reply with install command
Listing + install path for CoalMine:
https://www.openagentskill.com/skills/hetcreep-coalmine?ref=x

Install: npx skills add HetCreep/CoalMine
Open reply draft

Listing source

Community indexed

Claimable

This listing was indexed from public sources and is not marked official until a maintainer claim is approved.

Creator
HetCreep
Indexed by
OpenAgentSkill community index

Attribution links to the public repository or creator profile. Creators can claim the listing to update ownership signals.

Claim this skill

Owner claim

Claim this skill listing

This Community indexed listing is attributed to HetCreep but is not marked official yet. Claim it to add a verified owner signal and make future launch, install, and audit updates easier to trust.

Creator backlink kit

Add the evidence badges to your README

Show the canonical listing, current trust and audit signals, and real Agent-Proven evidence where developers evaluate the repository.

[![Listed on OpenAgentSkill](https://www.openagentskill.com/api/badge/hetcreep-coalmine?metric=listed&label=Listed)](https://www.openagentskill.com/skills/hetcreep-coalmine)
[![OpenAgentSkill Trust](https://www.openagentskill.com/api/badge/hetcreep-coalmine?metric=trust&label=Trust)](https://www.openagentskill.com/skills/hetcreep-coalmine)
[![OpenAgentSkill Audit](https://www.openagentskill.com/api/badge/hetcreep-coalmine?metric=audit&label=Audit)](https://www.openagentskill.com/skills/hetcreep-coalmine/audit)
[![Agent Proven](https://www.openagentskill.com/api/badge/hetcreep-coalmine?metric=proven&label=Agent%20Proven)](https://www.openagentskill.com/skills/hetcreep-coalmine)
Preview badge Open audit Creator kit

Author

H

HetCreep

@hetcreep

Tags

code-qualityagent-skillscode-healthsupply-chaindrift-detection

Platform fit

Claude CodeOpenAI AgentsCursor

Health signals

GitHub stars
11
Quality score
42/100
Last GitHub push
Aug 8, 2026
Framework hints
1
OpenAgentSkill views
4
Install copies
0
Outbound clicks
0

Community signal

Share whether this skill looks useful for your agent workflow. Aggregated feedback improves rankings over time.

Trust & safety

Sandbox only

62
  • GitHub adoption11 GitHub starsFIX
  • Stars/forks activity11 stars, 2 forks; issue activity unavailable in current metadataFIX
  • Recent maintenance14d since pushPASS
  • License clarityApache-2.0PASS
  • README/SKILL.md completenessMetadata includes enough usage and workflow contextPASS
  • Dependency/runtime riskcommand execution surface, credential or environment accessCHECK

Related skills

Code Review

Review a branch or diff against repository standards and the originating spec in two independent analysis passes.

168.6K Stars

Grill With Docs

A relentless interview that pressure-tests a plan against the codebase, sharpens domain language, and updates CONTEXT.md and ADRs when decisions become durable.

164.7K Stars

To Spec

Turn the current conversation and codebase context into a structured implementation spec, then publish it to the configured project issue tracker.

164.7K Stars

To Tickets

Break a plan, spec, or conversation into independently actionable tracer-bullet tickets with explicit blocking relationships.

176.7K Stars
InstallView on GitHub