Skill Claude CodeCodex
Build a runnable, multi-page UX prototype as a real SPA when static HTML is insufficient. Use when the prototype must demonstrate routing, state persistence, dynamic data, or interactive flows that exceed what plain HTML/CSS can convey. Provides a Vite + React + Tailwind + Framer Motion + Lucide scaffold, data-driven…
Skill Claude CodeCodex
Drive a real browser from an Frontier FDE for prototype validation, web research, HTML output verification, and accessibility audits. Use when an agent needs to render JavaScript, click/type/screenshot a page, run an axe-core a11y audit, or read a JS-rendered page. Backed by Microsoft's Playwright MCP server…
Skill Claude CodeCodex
Read-only hygiene review that reports cosmetic lint/style findings as LOW advisories and requests explicit approval before cleanup. Genuine defects are assessed separately by impact.
Skill Claude CodeCodex
Rewrite working code into its minimal, elegant form -- lower cyclomatic complexity, fewer lines, no dead code, no needless abstractions -- using a Draft -> Optimize -> Verify loop. Use when asked to compress, minimize, simplify, or make code more elegant WITHOUT sacrificing correctness, boundary validation, or…
Skill Claude Code
Use when reviewing implementation changes for correctness, evidence and release risk with the repository exact-scope rubric and native verification commands.
Skill Claude CodeCodex needs its repo
Implement configuration management patterns including environment variables, secrets, feature flags, and validation strategies. Use when setting up app configuration, managing environment-specific settings, implementing feature flags, storing secrets securely, or validating configuration at startup.
Skill Claude Code
Create upload-ready Microsoft 365 Copilot Cowork plugin packages containing manifest.json, color and outline icons, and one or more agent skills, MCP connectors, or both. Use for Cowork plugin authoring, packaging, and validation requests.
Skill Claude Code
Create upload-ready Microsoft 365 Copilot Cowork skills as zip packages containing SKILL.md plus populated assets, references, and scripts folders. Use for Cowork, co-work, or coworker skill authoring and packaging requests.
Skill Claude CodeCodex needs its repo
Manage dependencies with version pinning, lock files, vulnerability scanning, and update strategies. Use when adding new packages, pinning dependency versions, scanning for vulnerabilities, updating outdated dependencies, or managing monorepo dependency graphs.
Skill Claude CodeCodex
Fan out independent work to multiple subagents with context isolation. Covers when to parallelize (independent reads, multi-file searches, parallel analysis), when not to (writes, dependent steps, shared mutable state), bounded concurrency limits, and the anti-patterns that turn parallel dispatch into corruption. Use…
Skill Claude CodeCodex needs its repo
Write effective documentation including inline docs, README structure, API documentation, and code comments. Use when writing README files, documenting APIs, creating architecture decision records, adding inline code documentation, or setting up documentation tooling.
Skill Claude CodeCodex needs its repo
Implement robust error handling with exceptions, retry logic, circuit breakers, and graceful degradation. Use when designing error handling strategies, implementing retry policies, adding circuit breakers, configuring timeouts, or building health check endpoints.
Skill Claude CodeCodex
Run a metric-driven autonomous experimentation loop on an isolated branch. Use when a task has a measurable target (latency, bundle size, test pass-rate, build time, memory, score, accuracy) and the agent should propose changes, measure each attempt against a baseline, keep wins and revert losses, and produce a…
Skill Claude CodeCodex needs its repo
Decide what to do with a feature branch once the work itself is complete. Covers the merge / open PR / keep open / discard decision, the pre-disposition checklist (loop complete, tests green, compound capture resolved), and cleanup commands for branches and worktrees. Use whenever an agent says "tests pass, now what?".
Skill Claude CodeCodex
Run parallel agent sessions on the same repo using git worktrees without corrupting the primary checkout. Use when an agent needs an isolated working directory for a prototype, a long-running experiment, a parallel branch, or a deploy artifact, especially when Frontier is being driven from a single primary clone.
Skill Claude Code needs its repo
Evidence-backed refinement loop for covered create/update/delete/rename of PRD, TechSpec, code or unit tests; other work is exempt. Covers setup, completion, recovery and post-loop test consent.
Skill Claude Code
Use when writing, reviewing, or refactoring code to avoid LLM coding mistakes. Apply Karpathy's principles to avoid overcomplication, make surgical changes, surface assumptions, and define verifiable success criteria.
Skill Claude CodeCodex needs its repo
Implement observability patterns including structured logging, log levels, correlation IDs, metrics, and distributed tracing. Use when adding structured logging, implementing correlation IDs for request tracing, configuring metrics collection, setting up distributed tracing, or designing alerting rules.
Skill Claude Code
Edit prose into clearer, more human writing while preserving the writer's voice, or detect named AI-slop patterns without rewriting. Use when a user asks to remove AI-sounding phrasing, audit prose for formulaic writing, sharpen a draft, or preserve voice during an edit.
Skill Claude Code
Inspect code hygiene without automatic cleanup. Use advisory mode in local loops/reviews, report cosmetic findings as LOW, and request explicit user approval before safe fixes. Preserve independent strict gates.
Skill Claude CodeCodex
Create, validate, and maintain Frontier skills following the agentskills.io specification. Use when scaffolding a new skill, auditing skill compliance, restructuring for progressive disclosure, or adding scripts/references/assets to an existing skill.
Skill Claude CodeCodex
Decide when to compact, reset, or continue a long-running agent session. Use when context pressure rises, when a checkpoint boundary is reached, or when a clean handoff to a different agent is needed. Encodes the rule that compaction is safe between phases but dangerous mid-implementation, and that reset beats…
Skill Claude CodeCodex
Disciplined debugging for stalled bug fixes. Use when an Engineer or Reviewer has tried two or more fixes that did not work, when symptoms keep moving, or when the same test keeps failing for different reasons. Forces root-cause investigation, pattern analysis, hypothesis testing, and a final implementation, in that…
Skill Claude CodeCodex needs its repo
Apply testing strategies including test pyramid, unit/integration/e2e testing, and coverage requirements. Use when writing unit tests, designing integration test suites, implementing end-to-end tests, measuring test coverage, or setting up continuous testing pipelines.
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: