Use when starting a session or when you need to discover which skill applies to the current task. This is the meta-skill that governs how all other skills are discovered and invoked.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Using Agent Skills
## Overview
Agent Skills is a collection of engineering workflow skills organized by development phase. Each skill encodes a specific process that senior engineers follow. This meta-skill helps you discover and apply the right skill for your current task.
## Skill Discovery
When a task arrives, identify the development phase and apply the corresponding skill:
```
Task arrives
│
├── Vague idea/need refinement? ──→ idea-refine
├── New project/feature/change? ──→ spec-driven-development
├── Have a spec, need tasks? ──────→ planning-and-task-breakdown
├── Implementing code? ────────────→ incremental-implementation
│ ├── UI work? ─────────────────→ frontend-ui-engineering
│ ├── API work? ────────────────→ api-and-interface-design
│ └── Need better context? ─────→ context-engineering
├── Writing/running tests? ────────→ test-driven-development
│ └── Browser-based? ───────────→ browser-testing-with-devtools
├── Something broke? ──────────────→ debugging-and-error-recovery
├── Reviewing code? ───────────────→ code-review-and-quality
│ ├── Security concerns? ───────→ security-and-hardening
…
The line at the top of this page pins the label git:20260215.71aea09, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_oilx5usdylavvn6o
GET https://markdownregistry.com/api/v1/resolve?ref=lll0k0lad/agent-skills/using-agent-skills
GET https://markdownregistry.com/api/v1/blob/c33c1d52d2d910cc2c933de338a48f4b778994f07584b951387cf4a507f0a386
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
lll0k0lad/agent-skills · skills/api-and-interface-design/SKILL.md · Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints…
lll0k0lad/agent-skills · skills/browser-testing-with-devtools/SKILL.md · Use when building or debugging anything that runs in a browser. Use when you need to inspect the DOM, capture console…
lll0k0lad/agent-skills · skills/ci-cd-and-automation/SKILL.md · Use when setting up or modifying build and deployment pipelines. Use when you need to automate quality gates, configure…
lll0k0lad/agent-skills · skills/code-review-and-quality/SKILL.md · Use before merging any change. Use when reviewing code written by yourself, another agent, or a human. Use when you…
lll0k0lad/agent-skills · skills/context-engineering/SKILL.md · Use when starting a new session, when agent output quality degrades, when switching between tasks, or when you need to…
lll0k0lad/agent-skills · skills/debugging-and-error-recovery/SKILL.md · Use when tests fail, builds break, behavior doesn't match expectations, or you encounter any unexpected error. Use when…
lll0k0lad/agent-skills · skills/documentation-and-adrs/SKILL.md · Use when making architectural decisions, changing public APIs, shipping features, or when you need to record context…
lll0k0lad/agent-skills · skills/frontend-ui-engineering/SKILL.md · Use when building or modifying user-facing interfaces. Use when creating components, implementing layouts, managing…
lll0k0lad/agent-skills · skills/git-workflow-and-versioning/SKILL.md · Use when making any code change. Use when committing, branching, resolving conflicts, or when you need to organize work…
lll0k0lad/agent-skills · skills/idea-refine/SKILL.md · Refine ideas through structured divergent and convergent thinking. Use "idea-refine" or "ideate" to trigger.
addyosmani/agent-skills · skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow…
shashankswe2020-ux/whoop-mcp · .github/skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session or when you need to discover which skill applies to the…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-cursor/.cursor/skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-codex/.agents/skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-forgecat/platforms/cursor/.cursor/skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-claude/.claude/skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session, or
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-forgecat/skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow…
nota-america/forgecat-agent-profiles · profiles/addyosmani/agent-skills/for-forgecat/platforms/codex/.agents/skills/using-agent-skills/SKILL.md · Discovers and invokes agent skills. Use when starting a session, or when you need to decide which skill or workflow…