Battle-tested Claude Code configs — opinionated CLAUDE.md baselines, skills, slash commands and enforcement hooks you drop into any project
Skill Claude CodeCodex
Design and review HTTP/REST (and choose between REST/GraphQL/gRPC) APIs that are contract-first, resource-oriented, backward-compatible, and secure by default. Use whenever the task touches an API surface — designing an API, adding or changing an endpoint or route, picking an HTTP method or status code, naming…
Skill Claude CodeCodex
Build, refactor, and review frontend UI in any framework — components, accessibility, forms, client state and data fetching, responsive layout, performance, client-side security/PII, and UX/visual design (design plan, tokens, typography, color, spacing, motion). Use whenever the task touches the UI layer: creating or…
Skill Claude CodeCodex
Recover when the AGENT itself is stuck — looping, repeating the same failed action, burning tokens/budget, overflowing context, drifting from the goal, or acting on stale state. Use when a run isn't converging and reworded retries aren't helping. This is a workflow you follow, not a hidden runtime that auto-heals. For…
Skill Claude CodeCodex
Build a new feature using strict test-driven development — UNDERSTAND → DESIGN → RED → VERIFY RED → GREEN → VERIFY GREEN → REFACTOR → VALIDATE → REPEAT. Use when building a new feature with TDD, when the user says "TDD this", "tests first", "red green refactor", or asks for feature work that needs to be verifiable…
Skill Claude CodeCodex
Write production code with security-first thinking, SOLID design, pragmatic principles, observability, and strict file-structure limits. Use when implementing a new feature, designing a system, refactoring code, or whenever the task is "build production code" rather than fix a bug or write tests. This is the default…
Skill Claude CodeCodex
Produce living, DDD-aligned feature documentation as a single Markdown file with 10 fixed sections — overview, ubiquitous language, domain model, Gherkin behaviors, ADRs, technical spec, observability, deployment & rollback, C4 diagrams, platform compatibility. Use when the user asks to document a feature, write…
Skill Claude CodeCodex
Apply platform-agnostic engineering rules so code, tests, and Docker builds behave identically on Linux, macOS, and native Windows. Use when writing or reviewing code that touches the filesystem, shell, subprocess, encoding, time, paths, native dependencies, or CI matrix — or when the user mentions Windows, macOS…
Skill Claude CodeCodex
Evaluate non-deterministic LLM/AI output with evals instead of one-shot "it worked" — define expected behavior first, measure pass@k / pass^k, and grade with code / model / human graders. Use when building or changing an AI/LLM feature, an agent, a prompt, a RAG pipeline, or a classifier, where a single good run is…
Skill Claude CodeCodex
Run structured exploratory testing — write a charter, time-box a session, apply heuristics and oracles to discover bugs the scripted suite never looks for, then debrief and file solid bug reports. Use when the user says "test this manually", "find bugs", "explore the feature", "edge cases", "risk-based testing"…
Skill Claude CodeCodex
Fix a bug using strict TDD — UNDERSTAND → REPRODUCE (RED) → VERIFY RED → FIX → VERIFY GREEN → VALIDATE → REFACTOR. Use when the user reports a bug, asks to fix something, mentions a Sentry/error/regression, or pastes a stack trace. Bugs require a failing test that proves the bug existed before any code change. For…
Skill Claude Code
Automate browser interactions, test web pages and work with Playwright tests.
Skill Claude CodeCodex
Review a pull request and produce a GitHub-comment-shaped review document with severity-labeled findings (Blocker / Important / Recommended / Nice-to-have) plus a copy-paste-safe action checklist for the author. Use when the user asks to review a PR, "code review", "review this diff", "verify the changes before…
Skill Claude CodeCodex
Run a multi-step or unattended agent loop safely — sequential pipelines, implement→review→fix (PR) loops, parallel fan-out, and RFC→DAG orchestration. Use when the user wants to "loop", "run autonomously", "iterate until it's done", chain claude -p calls, fan out parallel agents on a spec, or set up an…
Skill Claude CodeCodex
Review an application's code for security across frontend AND backend and produce a prioritized, safe-to-apply remediation plan — OWASP Top 10 (2025), OWASP API Top 10, plus privacy (LGPD/GDPR). Use when the user asks for a "security review", "security audit", "harden this", "is this secure?", "check for…
Skill Claude CodeCodex
Structured security design analysis — find what can go wrong before an attacker does. Build a Data Flow Diagram with trust boundaries, apply STRIDE per element, add abuse/misuse cases, and map every threat to a control and a test. Use when the user asks to threat model a feature/system, run STRIDE, map the attack…
Skill Claude CodeCodex
Validate a bugfix or feature against the REAL running system — execute the user's cURL, assert actual responses, check persisted database state, and drive the UI end-to-end — instead of assuming the code change works. Use whenever the user provides a cURL command, a localhost/endpoint URL, or asks to "validate", "test…
Skill Claude CodeCodex
Author product requirements — PRDs, product specs, one-pagers, PR-FAQs, product briefs — that lead with the problem, define testable success metrics and acceptance criteria, and make non-goals explicit. Use when the user asks to write a PRD, write/define product requirements, write a product spec, write a one-pager…
Skill Claude CodeCodex
Generate conventional-commit PR titles, commit messages, and concise PR descriptions from staged changes or a branch diff. Use when the user asks to create a PR, write a PR title, generate a commit message, or draft a PR description. Output goes directly to the chat — never to a file.
Skill Claude CodeCodex
Write unit, integration, and E2E tests that follow the testing pyramid, the Arrange-Act-Assert pattern, the shouldXwhenY naming convention, and meet a 75% (target 80%) branch coverage gate per supported OS. Use when the user asks to write tests, add coverage, build a test suite, fix flaky tests, or verify a feature…
Skill Claude CodeCodex
Create, evolve, and ship Langflow Components — the building blocks of every flow. Use when the user asks to "create a component", "add a provider component", "build an LLM component", "add Anthropic / OpenAI / Chroma / etc. integration", "expose this as a Component", or "wrap this LangChain class as a Component".…
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: