The definitive guide & configuration system for GitHub Copilot CLI — agents, skills, rules, multi-AI orchestration, and more
Skill Claude CodeCodex
Use when a task must stay inside a narrow file or directory boundary, or when risky commands need an explicit stop rule — define the writable surface first so the agent does not drift.
Skill Claude CodeCodex
Use when delegated work needs runtime guardrails — constrain sub-agents with loop detection, circuit breakers, and escalating sandbox levels before accepting their output.
Skill Claude CodeCodex
Use when a request arrives and the right execution path is unclear — routes the work to the correct mode, agent type, model tier, and delegation pattern before implementation starts.
Skill Claude CodeCodex
Use when a task is too large or multi-domain for a single agent — assemble a specialist team, assign work via SQL tracking, dispatch with /fleet or task tool, and synthesize results.
Skill Claude CodeCodex
Use before a large Copilot task when model choice, context size, or parallelism could drive up billed usage — estimate cost pressure early and apply Copilot-specific reduction tactics before you run.
Skill Claude CodeCodex
Use when defining a public API, CLI, webhook, or SDK surface — lock the contract first so compatibility, validation, and versioning stay intentional instead of accidental.
Skill Claude CodeCodex
Use when reviewing code changes for quality, correctness, and security — runs a structured checklist with severity-rated findings.
Skill Claude CodeCodex
Use when designing prompts or agent tasks to optimize information delivery — minimize noise, maximize signal for AI agents.
Skill Claude CodeCodex
Use when a C++ failure involves memory lifetime, undefined behavior, native crashes, or debugger-only state — debug with symbols, sanitizers, and platform-native debuggers before patching symptoms.
Skill Claude CodeCodex
Use when removing old APIs, migrating to new patterns, or cleaning up legacy code — treats code as liability and follows a structured removal process.
Skill Claude CodeCodex
Use when a bug or performance issue is still fuzzy — build the fastest feedback loop first, rank the leading hypotheses, and instrument only what narrows the search.
Skill Claude CodeCodex
Use when a build, compilation, or type-check fails — diagnose the error, identify root cause, and apply the minimal fix to get green.
Skill Claude CodeCodex
Use when you have a GitHub Issue number or link and want it resolved end-to-end — reads the issue, locates the bug, applies a fix, writes tests, and opens a PR from the terminal.
Skill Claude CodeCodex
Use when starting implementation work from a PRD, spec, or set of issues — to follow a structured TDD → validate → review → commit loop.
Skill Claude CodeCodex
Use when a codebase feels hard to change, test, or navigate — surface architectural friction, identify deeper module seams, and walk one candidate into a concrete refactoring direction.
Skill Claude CodeCodex
Use when building a NestJS application with Prisma — covers PrismaService setup as an injectable singleton, repository pattern integration, and testing with Prisma mocks.
Skill Claude CodeCodex
Use when working on a Next.js App Router project that uses Prisma as the ORM — covers server component data fetching, singleton client setup, and type-safe query patterns.
Skill Claude CodeCodex
Use when performance is a real concern — measure first, isolate the bottleneck, and prove the improvement instead of guessing.
Skill Claude CodeCodex
Review a pull request from 6 perspectives (PM, Dev, QA, Security, DevOps, UX) for comprehensive, bias-free feedback.
Skill Claude CodeCodex
Use when a design question is still fuzzy — build a throwaway logic or UI prototype that answers one question fast, stays easy to run, and is meant to be deleted or absorbed.
Skill Claude CodeCodex
Use when adding or improving tests in a React project that uses Vitest — covers component testing with Testing Library, mocking hooks, and coverage configuration.
Skill Claude CodeCodex
Use when you have just received code review feedback (human or agent) and are about to act on it — verify each item against the codebase before implementing, and push back with technical reasoning instead of performative agreement.
Skill Claude CodeCodex
Use when code has grown complex, duplicated, or cluttered — clean up structure and remove dead code without changing observable behavior.
Skill Claude CodeCodex
Use when you want to check whether a code change follows the repository's documented conventions (Standards) and aligns with the originating issue or PRD (Spec) — compared against a pinned git reference.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: