The largest community-driven library of Agent Skills (SKILL.md + scripts/references/examples) for Claude, Codex, Gemini CLI, Cursor and friends.
Skill Claude CodeCodex
Edits prose for grammar, spelling, punctuation, clarity, concision, and consistent style while preserving the author's meaning, voice, and intent. Use this skill when the user asks to proofread, copyedit, polish, clean up, tighten, fix grammar in, or improve the readability of text such as emails, essays, blog posts…
Skill Claude CodeCodex
Coaches a speaker to prepare and deliver a talk, presentation, toast, or pitch — shaping a core message and narrative arc, structuring the talk, writing a strong open and close, tightening delivery, and managing nerves and Q&A. Use this skill when a user asks to "help me with a speech", "prepare a talk/presentation"…
Skill Claude CodeCodex
Designs end-to-end retrieval-augmented generation (RAG) systems by making principled choices for chunking, embeddings, vector indexing, retrieval, reranking, prompt assembly, and offline evaluation. Use this skill when the user wants to build or improve a RAG pipeline, asks about chunking strategy, embedding model…
Skill Claude CodeCodex
Generates polished, well-structured project READMEs with badges, a one-line tagline, quick-start, installation, usage examples, configuration tables, contribution guidelines, and a license section. Use this skill when the user asks to "write a README", "generate a README", "create README.md", "improve my README", "add…
Skill Claude CodeCodex
Applies safe, incremental, behavior-preserving refactorings (extract function/variable, rename, inline, decompose conditionals, remove duplication, replace conditional with polymorphism, introduce parameter object) using a test-protected, small-step workflow. Use this skill when the user asks to "refactor", "clean…
Skill Claude CodeCodex
Designs, explains, hardens, and tests regular expressions for parsing and validation tasks (emails, URLs, dates, IPs, log lines, CSV fields, identifiers, etc.) while actively defending against catastrophic backtracking (ReDoS). Use this skill when the user asks to "write a regex", "build/fix a regular expression"…
Skill Claude CodeCodex
Transforms merged pull requests, commit logs, and changelog entries into clear, user-facing release notes grouped into Features, Improvements, Bug Fixes, and Breaking Changes. Use this skill when asked to "write release notes", "draft a changelog", "summarize this release", "turn these PRs/commits into release notes"…
Skill Claude CodeCodex
Writes and rewrites high-impact resumes and CVs that pass ATS screening and win recruiter attention — translating raw work history into quantified, outcome-driven bullet points, choosing the right format, and tailoring to a target role. Use this skill when a user asks to "write my resume", "fix my CV", "make my resume…
Skill Claude CodeCodex
Coaches a candidate or employee through compensation negotiation — researching market ranges, anchoring, countering an offer, negotiating the full package (base, bonus, equity, signing, benefits), and scripting the conversation. Use this skill when a user asks to "negotiate my salary", "I got a job offer, what do I…
Skill Claude CodeCodex
Detects, prevents, and remediates leaked credentials and teaches safe secret handling using environment variables, vaults (HashiCorp Vault, AWS/GCP/Azure secret stores), KMS envelope encryption, and rotation. Use this skill when a user mentions hardcoded API keys, passwords, tokens, or .env files in code; asks how to…
Skill Claude CodeCodex
Performs a security-focused review of code or a diff, hunting for injection, broken authentication/authorization, insecure crypto, hardcoded secrets, unsafe deserialization, SSRF, path traversal, and missing input validation, with exploit scenarios and concrete fixes ranked by severity. Use this skill when the user…
Skill Claude CodeCodex
Defines modern authentication and password policies aligned with NIST SP 800-63B, covering minimum length, blocklist/breach screening, rate limiting, MFA, password storage hashing, and account recovery. Use this skill when asked to "write a password policy", "review our authentication requirements", "implement NIST…
Skill Claude CodeCodex
Audits source code against the OWASP Top 10 (2021) and produces concrete, exploitable findings with proof-of-concept, severity ratings, and copy-pasteable fixes. Use this skill when the user asks to "do a security review", "audit this code for vulnerabilities", "check for OWASP Top 10 issues", "find security bugs"…
Skill Claude CodeCodex
Use this skill when the user needs X or Twitter social data extraction, tweet search, profile and follower lookup, media download, webhook monitoring, MCP setup, or REST API integration with Xquik and the x-developer skill package.
Skill Claude CodeCodex
Diagnoses and fixes slow SQL queries using EXPLAIN/EXPLAIN ANALYZE plan reading, index design, query rewrites, statistics, and schema-aware tuning across PostgreSQL, MySQL/MariaDB, SQL Server, Oracle, and SQLite. Use this skill when a user says a query is slow, times out, "takes forever", needs an index, asks to…
Skill Claude CodeCodex
Designs normalized relational database schemas with primary/foreign keys, constraints, indexes, and deliberate denormalization, producing engine-aware DDL and an ER model. Use this skill when the user asks to design a database schema, model entities and relationships, normalize tables, fix update/insert/delete…
Skill Claude CodeCodex
Builds a realistic, personalized learning roadmap for a skill or subject — with milestones, curated resource types, active practice, spaced review, and progress checkpoints — fit to the learner's deadline and weekly time budget. Use this skill when the user asks to "make a study plan", "create a learning roadmap"…
Skill Claude CodeCodex
Produces a rigorous SWOT analysis (Strengths, Weaknesses, Opportunities, Threats) for a company, product, team, project, or personal decision, then converts the four quadrants into prioritized, concrete strategic actions using a TOWS cross-matrix. Use this skill when the user asks for a "SWOT analysis", "SWOT"…
Skill Claude CodeCodex
Produces clear, well-structured technical documentation — guides, API docs, READMEs, tutorials, reference pages, and release notes — by analyzing audience, choosing the right document type, applying plain-language and information-architecture principles, and including runnable examples. Use this skill when the user…
Skill Claude CodeCodex
Authors reusable, production-grade Terraform modules with clean typed variables, well-documented outputs, version pinning, state hygiene, and built-in validation. Use this skill when the user asks to "write a Terraform module", "refactor Terraform into a module", "add variable validation", "structure a Terraform…
Skill Claude CodeCodex
Runs structured STRIDE threat modeling by decomposing a system into a data flow diagram, enumerating threats per element (Spoofing, Tampering, Repudiation, Information disclosure, Denial of service, Elevation of privilege), and producing prioritized, actionable mitigations with risk ratings. Use this skill when the…
Skill Claude CodeCodex
Builds realistic, day-by-day travel itineraries that balance logistics, budget, pacing, and local highlights, with hour-level day plans, transit links, cost estimates, and contingency buffers. Use this skill when a user asks to "plan a trip", "build an itinerary", "plan X days in ", "what should I do in ", "make a…
Skill Claude CodeCodex
Writes thorough, maintainable unit tests with comprehensive edge cases, table-driven cases, proper mocking/stubbing, and meaningful coverage across languages and frameworks (pytest, Jest/Vitest, Go testing, JUnit, RSpec, xUnit, Rust). Use this skill when the user asks to "write tests", "add unit tests", "improve…
Skill Claude CodeCodex
Writes high-quality agile user stories that satisfy the INVEST criteria, with clear role/goal/benefit phrasing and testable Gherkin (Given/When/Then) acceptance criteria, and splits epics into thin vertical slices. Use this skill when the user asks to "write a user story", "create acceptance criteria", "break this…
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: