Coding Skills

Reusable AI agent skills for software development workflows.

Skills

Skill	Purpose	Trigger phrases
ci-detective	Investigate CI failures by cross-referencing against other recent runs to determine if failures are pre-existing or introduced by the PR	"investigate CI failure", "is this test flaky", "why is this test failing", "ci detective"
coordinating-agents	Coordinate one task between two or more agents on the same machine (e.g. Claude Code and Codex) through a file channel under `.git`: single-writer numbered messages, a watcher loop, and terminal markers, with the helpers run in a 2.4 MB busybox container on any host, so the user stops relaying between windows	"coordinate the task with ", "coordinate with Astra", "talk to the other agent", "hand this off to Codex"
pr-lawyer	Address PR review comments by fixing valid feedback or challenging debatable ones with a reasoned argument	"address PR comments", "respond to review", "challenge this comment", "fight back on review", "pr lawyer"
pr-nurse	Monitor CI builds and merge conflicts for a PR, diagnose failures, merge main, and push fixes	"nurse this PR", "check CI", "fix the build", "why is CI failing", "resolve conflicts"
pr-reviewer	Staged adversarial review pinned to an exact PR revision: three independent reviewers, an assessor that steel-mans every finding, a summary agent, and a convergence loop that restarts when the PR moves	"review this PR", "adversarial review", "deep PR review", "audit this pull request", "pr reviewer"
pr-scribe	Generate a concise PR description from a GitHub pull request diff	"describe this PR", "add PR description", "fill in PR body", "summarize PR changes"
the-mister	Plan an implementation as a DAG and dispatch every node to a cheaper subagent by difficulty (Opus/Sol, Sonnet/Terra, Haiku/Luna), with all git operations always on Haiku/Luna; the mister only orchestrates and verifies	"orchestrate this", "plan and delegate", "use the squad", "mister", "ask the mister", "delegate to cheaper models"

Platform Support

These skills work with multiple AI coding agents. The repo includes symlinks for automatic discovery:

Platform	Discovery path	How to install
Claude Code	`.claude/skills/`	Clone repo, or install as plugin
GitHub Copilot	`.github/skills/`	Clone repo into your project
OpenAI Codex	`.agents/skills/`	Clone repo into your project
Gemini CLI	`.gemini/skills/` or `.agents/skills/`	Clone repo, or install as extension

All four paths are symlinks to the canonical skills/ directory, so skills stay in sync.

Quick Start

Option 1: Clone into your project

git clone https://github.com/mdelapenya/coding-skills.git

The symlinks inside the repo handle platform discovery automatically.

Option 2: Copy skills to your agent's discovery path

macOS / Linux:

# For Claude Code
cp -r skills/* ~/.claude/skills/

# For Copilot
cp -r skills/* .github/skills/

# For Codex
cp -r skills/* .agents/skills/

# For Gemini CLI
cp -r skills/* .gemini/skills/

Windows (PowerShell):

Copy-Item -Recurse skills\* "$env:USERPROFILE\.claude\skills\"

Option 3: Symlink for single source of truth

macOS / Linux:

REPO=/path/to/coding-skills/skills

# Claude Code (user-global)
ln -s $REPO/ci-detective ~/.claude/skills/ci-detective
ln -s $REPO/coordinating-agents ~/.claude/skills/coordinating-agents
ln -s $REPO/pr-lawyer ~/.claude/skills/pr-lawyer
ln -s $REPO/pr-nurse ~/.claude/skills/pr-nurse
ln -s $REPO/pr-reviewer ~/.claude/skills/pr-reviewer
ln -s $REPO/pr-scribe ~/.claude/skills/pr-scribe
ln -s $REPO/the-mister ~/.claude/skills/the-mister

# Agents used by the-mister (Claude Code reads ~/.claude/agents/ at session start)
mkdir -p ~/.claude/agents
ln -s $REPO/the-mister/agents/engineer.md ~/.claude/agents/engineer.md
ln -s $REPO/the-mister/agents/git-operator.md ~/.claude/agents/git-operator.md
ln -s $REPO/the-mister/agents/reviewer.md ~/.claude/agents/reviewer.md
ln -s $REPO/the-mister/agents/mechanic.md ~/.claude/agents/mechanic.md
ln -s $REPO/the-mister/agents/inspector.md ~/.claude/agents/inspector.md
ln -s $REPO/the-mister/agents/the-mister.md ~/.claude/agents/the-mister.md

Windows (PowerShell):

True symlinks require admin rights or Developer Mode. Use directory junctions instead — they don't need admin and the harness follows them transparently:

$repo = "C:\path\to\coding-skills\skills"
$home_skills = "$env:USERPROFILE\.claude\skills"

foreach ($n in 'ci-detective','coordinating-agents','pr-lawyer','pr-nurse','pr-reviewer','pr-scribe','the-mister') {
    New-Item -ItemType Junction -Path (Join-Path $home_skills $n) -Target (Join-Path $repo $n)
}

Option 4: Install with Tessl

The skills are published to the Tessl registry as the plugin mdelapenya/coding-skills. Tessl installs them for every agent it finds in the project (Claude Code, Codex, Cursor, Gemini CLI, Copilot):

# All skills, from the registry
tessl install mdelapenya/coding-skills

# Only some skills, straight from GitHub
tessl install github:mdelapenya/coding-skills --skill the-mister --skill pr-reviewer

A few things to know:

The first tessl install in a repository also runs tessl init, which writes tessl.json and agent configuration files (AGENTS.md, CLAUDE.md, MCP settings for each agent).
Skills are linked under a tessl__ prefix, for example .claude/skills/tessl__the-mister.
the-mister's agent definitions ship inside the skill, in the-mister/agents/, but Tessl does not install agents. Without them the skill falls back to general-purpose subagents, so its role fences become instructions only. To get the shipped agents, link them as in Option 3 from .tessl/plugins/mdelapenya/coding-skills/skills/the-mister/agents/, or install the repository as a Claude Code plugin.

Repo Structure

coding-skills/
├── skills/                          # Canonical skill files
│   ├── ci-detective/
│   │   ├── SKILL.md
│   │   └── references/
│   │       ├── github-actions.md
│   │       └── gitlab-ci.md
│   ├── coordinating-agents/
│   │   ├── SKILL.md
│   │   └── scripts/                 # post, watch, ack, lock (POSIX sh, run in busybox via Docker)
│   ├── pr-lawyer/
│   │   ├── SKILL.md
│   │   └── references/
│   │       ├── github.md
│   │       └── gitlab.md
│   ├── pr-nurse/
│   │   ├── SKILL.md
│   │   └── references/
│   │       ├── github.md
│   │       └── gitlab.md
│   ├── pr-reviewer/
│   │   ├── SKILL.md
│   │   └── references/
│   │       ├── design.md
│   │       ├── passes.md
│   │       ├── publication.md
│   │       ├── report.md
│   │       ├── state.md
│   │       └── agents/
│   │           ├── claude-code.md
│   │           ├── codex.md
│   │           ├── copilot.md
│   │           ├── gemini.md
│   │           └── generic.md
│   ├── pr-scribe/
│   │   ├── SKILL.md
│   │   └── references/
│   │       ├── biomelab.md
│   │       ├── github.md
│   │       └── gitlab.md
│   └── the-mister/
│       ├── SKILL.md
│       ├── agents/                  # Claude Code agent definitions, listed in .claude-plugin/plugin.json
│       │   ├── engineer.md          # Hard and Medium nodes
│       │   ├── git-operator.md      # every Git node
│       │   ├── mechanic.md          # Easy nodes
│       │   ├── inspector.md         # independent acceptance checks
│       │   ├── reviewer.md          # read-only whole-change review (step 7)
│       │   └── the-mister.md        # optional no-Bash orchestrator (context: fork)
│       └── references/
│           ├── evidence.md
│           ├── peers.md
│           ├── review.md
│           ├── plan-and-orders.md
│           └── agents/
│               ├── claude-code.md
│               ├── codex.md
│               └── generic.md
├── .agents/skills -> ../skills      # Codex + Gemini CLI
├── .claude/skills -> ../skills      # Claude Code
├── .github/skills -> ../skills      # Copilot
├── .gemini/skills -> ../skills      # Gemini CLI
├── .claude-plugin/
│   └── plugin.json                  # Claude Code plugin manifest
├── .tessl-plugin/
│   └── plugin.json                  # Tessl plugin manifest (content: skills/)
├── tessl.json                       # links the repository to its Tessl project
├── evals/                           # Tessl eval scenarios: task, inputs, weighted rubric
├── scripts/                         # repository tooling (agent preamble sync)
├── tests/                           # tooling tests and the-mister A/B cases
├── gemini-extension.json            # Gemini CLI extension manifest
└── README.md

License

MIT