Claude Skills by black141312

Write an upgrade/migration guide between versions with breaking changes, before/after diffs, and a checklist.

Write a forward/backward database migration that applies and rolls back cleanly

Stand up a docs site (MkDocs or Docusaurus) with navigation, search, and a working local preview.

Request and handle runtime permissions correctly across iOS and Android

Stub or mock external services in tests so they run fast, offline, and deterministically

Update code to current language idioms, APIs, and syntax without changing behavior

Set up a workspace monorepo (pnpm/turbo/nx) with shared deps and a working task graph

Define a coherent motion system — duration tokens, easing curves, and clear rules for when to animate.

Find and fix N+1 query problems by eager-loading or batching the per-row queries

Flag unclear names in the diff and suggest sharper replacements

Add a Next.js App Router page or route handler with the right runtime

Write or optimize an nginx config for a reverse proxy or static site

Improve OCR accuracy — binarize, deskew, raise DPI, set language, fix contrast and noise

Generate a dev-setup and onboarding guide for the repo from its actual config and entry points

Push the current branch and open a GitHub PR with a structured title and body.

Write or update an OpenAPI spec so it matches the actual API behavior

Debug OpenCV pipelines — dtype mismatch, BGR channel order, ROI/bounds errors, in-place op surprises

Add or modify an ORM model and its relations, keeping schema and code in sync

Check a web app against the OWASP Top 10 and report concrete gaps per category

Add smooth route/page transitions with the View Transitions API or Framer that preserve context.

Add pagination to a list endpoint with a stable order and total/next signal

Optimize a measured hot path — profile first, fix the real bottleneck, prove the speedup

Add basic collision detection and response for 2D/3D game entities

Build a startup/investor pitch deck covering problem, solution, market, traction, and the ask.

Diff two images and localize exactly which pixels, regions, and channels differ between them

Force the laziest solution that actually works — YAGNI, stdlib before deps, shortest diff.

Write a blameless incident postmortem with timeline, root cause, and preventive action items

Generate a .pptx slide deck — use the built-in generate_pptx tool (no dependencies), or python-pptx for advanced custom layouts.

Export a .pptx deck to PDF or per-slide images for sharing, printing, or web embedding.

Convert a markdown document into slides using Marp or reveal.js, exporting to PPTX or HTML.

Apply a branded template/theme (fonts, colors, logo, master slides) to a PowerPoint deck.

Review a GitHub PR with gh, summarize the change, and suggest concrete improvements

Set up pre-commit hooks that lint and format staged files before each commit

Design a clear, persuasive pricing page that steers users to the right plan and reduces decision anxiety.

Describe a project well — purpose, architecture, layout, and how to run it — for a README or newcomer.

Design and refine a structured, testable LLM prompt template

Add property-based tests that assert invariants across generated inputs instead of fixed examples

Design protobuf schemas that stay backward- and forward-compatible as they evolve

Convert blocking Python code to async/await without deadlocks or hidden sync calls

Add Python type hints to existing code and get it passing mypy or pyright cleanly

Optimize a slow SQL query using EXPLAIN, indexes, and rewrites

Build a retrieval-augmented generation pipeline with grounded, cited answers

Scaffold a Rails resource with model, migration, controller, and routes

Add rate limiting to an API with correct keys, headers, and 429 responses

Convert a React class component to a function component using hooks

Add a React Native screen and wire it into the navigation stack

Diagnose and eliminate needless React re-renders with memoization

Write or refresh a README covering what the project is, why it exists, install, and usage

Clean up branch history with interactive rebase without rewriting shared commits

Make a safe, behavior-preserving refactor with tests green at every step