Git & Version Control

Process data files through transformation pipelines with validation, cleaning, and export. Use for CSV/Excel/JSON data processing, encoding handling, batch operations, and data transformation workflows.

Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Codex needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale.

Automatically creates user-facing changelogs from git commits by analyzing commit history, categorizing changes, and transforming technical commits into clear, customer-friendly release notes.

Use this skill when working with TypeScript/JavaScript files (.ts, .tsx, .js, .jsx, .mts, .cts, .mjs, .cjs) in Deno projects, or when the user asks about Deno-specific patterns, imports, configuration, testing, or tooling.

Automates release workflows for the Nomos monorepo per RELEASE.md including version tagging, changelog promotion, GitHub releases, and module-specific versioning. Use this when preparing releases, creating tags, or publishing new versions.

Production-ready Celery task templates with error handling, retries, rate limiting, time limits, and custom task classes. Use when creating Celery tasks, implementing retry logic, adding rate limiting, setting time limits, building custom task classes, validating task inputs with Pydantic, handling database operations, making API calls, or when user mentions task patterns, retry mechanisms, task templates, error handling, task best practices.

Linear surface for syncing issues and proposing/applying limited workflow actions.

Generates clear, conventional commit messages from git diffs. Use when writing commit messages or reviewing staged changes.

Comprehensive templates, patterns, and best practices for creating Claude Code subagents and skills. Use when building new agents/skills or need reference examples for proper structure and formatting.

Generate professional drug discovery reports including target dossiers,competitive briefs, and Go/No-Go decision summaries.Use this skill when you need formatted reports for presentations,decision meetings, or documentation. Supports multiple output formats.Keywords: report, dossier, decision, go-no-go, brief, presentation

This skill should be used when the user asks about "prompt_toolkit Validator", "validation", "input validation", "ValidationError", "History", "FileHistory", "InMemoryHistory", "auto_suggest", "AutoSuggest", or needs to validate user input or implement command history in prompt_toolkit applications.

WHEN: Coverage analysis, finding untested files, test prioritization, coverage gap identificationWHAT: Line/Branch/Function coverage + untested file list + priority by importance + improvement roadmapWHEN NOT: Test generation → test-generator, Test quality → code-reviewer

Complete security patterns for GitHub Actions covering action pinning, GITHUB_TOKEN permissions, third-party action risks, secret management, and runner security.

Systematic framework for selecting the optimal specialized agent for any task. Use when delegating to subagents via the Task tool to ensure the most appropriate specialist is chosen based on framework, domain, task type, and complexity. Applies decision tree logic to match tasks with agent expertise.

Manages parallel conversation branches using git worktrees. Use when you want to explore multiple solution approaches simultaneously, need to try different implementations, or want to checkpoint your current conversation state before branching into alternative paths.

Apply critical git safety protocols before any git operations, especially in collaborative environments. Use when performing git commands, managing files, or making destructive changes.

Build timeout-resistant Claude Code workflows with chunking strategies, checkpoint patterns, progress tracking, and resume mechanisms to handle 2-minute tool timeouts and ensure reliable completion of long-running operations.

Generate LLM-backed release notes between git tags using the repo release-scripts. Use when asked for changelogs, release notes, or summaries between two tags.

Build MCP (Model Context Protocol) servers with tools, prompts, and resources. Use when developing MCP servers, implementing tools/prompts/resources, debugging MCP issues, writing tests, or deploying servers. Covers SDK patterns, validation, and best practices.

Write minimal strategic tests during development focusing on core user flows and critical paths, deferring comprehensive edge case testing until after feature completion. Use this skill when writing tests for completed features, testing critical user workflows, implementing integration tests, creating end-to-end tests with Playwright, writing unit tests for core logic, or determining testing strategy and priorities. Apply when working on test files (*.test.ts, *.spec.ts, *.test.tsx), Playwright test files (e2e/*.spec.ts), test configuration, or when deciding what to test during feature development. This skill ensures minimal tests during active development (complete the feature first), focus exclusively on core user flows and critical paths (skip non-critical utilities), deferred edge case and validation testing until dedicated testing phases, behavior testing over implementation details (test WHAT not HOW), descriptive test names that explain the behavior and expected outcome, mocked external dependencies (d