Best agent skills for developers, page 12

Vitest API and config reference (Jest-compatible) — mocking with vi., spies, fake timers, coverage configuration, fixtures, snapshots, and test filtering.

supabase/supabase

Reproduce CUA-Harness experiments on WeaveBench from a GitHub checkout.

AMAP-ML/LongHorizon-Harness

Debugs LangChain and LangGraph agents by pulling recent execution traces with the langsmith-fetch CLI and reporting errors, tool calls, timings and token use.

ComposioHQ/awesome-claude-skills

Moves a legacy internal Ghost package from JavaScript and CommonJS to TypeScript and ESM in three focused commits that keep git file history intact.

TryGhost/Ghost

Walks through designing, building and polishing a command-line tool: user workflow and command hierarchy, implementation in commander, click, typer or cobra, completions and cross-platform testing.

Jeffallan/claude-skills

Syntax reference for KFL2, the CEL-based display filter language used to search Kubernetes network traffic captured by Kubeshark, loaded before any filter is written.

kubeshark/kubeshark

Creates a new sample agent in the ADK Python repository — the sample directory, its agent.py, and its README.md — following the conventions the existing samples already use.

google/adk-python

Create, improve, or evaluate an existing skill from workflows, prompts, SOPs, scripts.

yaojingang/yao-meta-skill

Master end-to-end testing with Playwright and Cypress to build reliable test suites that catch bugs, improve confidence, and enable fast deployment.

try-works/role-model

Walks through a Skyvern open-source release bump: update the version, rebuild the Python and TypeScript SDKs with Fern, commit, and open a pull request.

Skyvern-AI/skyvern

Scans C# and .NET code for about 50 performance anti-patterns and reports prioritized findings with concrete fixes, at a scan depth you choose.

dotnet/skills

Adds Worktrunk-specific rules to the tend CI workflows: Codecov polling, Rust test commands, labels and review criteria for pull requests handled in CI.

max-sixty/worktrunk

将 SRT 字幕做成暖米黄纸张底的白板手绘动画：读字幕→输出配图策略→确认后生成统一风格线稿→按叙事语义标注分区→预览台调整→渲染 MP4。编排沿用分区遮罩揭示（annotation.json / sequence / startMs / protectedRegions），但每个区域内的落墨换成 stream 的连续笔迹（骨架/网格 ink→color）。当用户提供 SRT…

geeklee/srt-whiteboard-animation

Migrate prompts and code from Claude Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5.

gotalab/skillport

Write or revise a page under docs/ for gofastmcp.com. An agent skill from PrefectHQ/fastmcp.

PrefectHQ/fastmcp

YouTrack CLI for a community checkout; the monorepo uses youtrack.

JetBrains/intellij-community

Provides comprehensive code review guidance for React 19, Vue 3, Angular 17+, Svelte 5, Rust, TypeScript, Java, Java 8, PHP, Ruby, Rails, Python, Django, FastAPI, Go, C/.NET, Kotlin, Swift, Dart…

awesome-skills/code-review-skill

Create videos from a text prompt using HeyGen's Video Agent.

calesthio/OpenMontage

Checklist for wiring a new linter into Opik's Code Quality pipeline: the four files to edit, the silent-failure gotchas and the pass/fail verification loop.

comet-ml/opik

Designs a project-specific agent harness: defines specialist agents, writes the skills they follow, picks an execution mode and model for each, and keeps the setup maintained.

revfactory/harness

Evaluates the design quality of an agent skill against official specifications and patterns from existing examples, scoring it and suggesting improvements.

shareAI-lab/Kode-CLI

A skill your agent uses for any question about a codebase, its architecture, file relationships, or project content — especially when graphify-out/ exists, where the question should be treated as a…

EBISPOT/ols4

Runs the json_repair docs demo against a local Flask API and static server, so changes to docs/app.py or the docs UI are checked end to end before publishing.

mangiucugna/json_repair

Communicate clearly in every response, progress update and agent-authored document.

databasus/databasus

Contributor guide for step three of adding a syncable entity to the Twenty server: write the validator, the migration action builder and the orchestrator wiring.

twentyhq/twenty

Migrate from ingress-nginx to Higress in Kubernetes environments.

higress-group/higress

Audits and updates the supported-os.json files for .NET releases, checking them against upstream lifecycle data and regenerating the markdown with the release-notes tool.

dotnet/core

Sorts a backlog of open pull requests into must-merge, candidate, superseded and deferred, writes a triage doc and works the merge loop before a release.

jamiepine/voicebox

Reviews the tests added in a pull request for fix coverage, quality, edge cases and test type, and recommends lighter test types where they would do.

dotnet/maui

Proves a Codewhale change in the real product: a stamped release build, an atomic local install, fresh-shell verification and manual QA that automated gates cannot cover.

codewhale-hq/Codewhale

A skill your agent uses when a user asks to wobble ty constraint ordering, check constraint-set or TDD ordering determinism, test reversed constraint/typevar IDs, or investigate nondeterministic ty…

astral-sh/ruff

Explains how to declare a firmware patch in a vphone patch set, add a new set, or write a preset, including naming, gating and the checks that catch undeclared patches.

Lakr233/vphone-cli

Analyzes V8, Chrome and Electron .heapsnapshot files with Node scripts to find memory leaks, detached DOM nodes and the retainer paths that keep objects alive.

keybase/client

Opens a pull request for the current ToolJet branch, pushing the root repo and the ee submodules, creating submodule PRs first and then the main PR with a generated description.

ToolJet/ToolJet

Read-only review of Qt6 C++ code that combines a deterministic lint script with six parallel analysis agents and reports only high-confidence issues.

x-tools-author/x-tools

A skill your agent uses when the task requires automating a real browser from the terminal (navigation, form filling, snapshots, screenshots, data extraction, UI-flow debugging) via playwright-cli…

JetBrains/skills

React DevTools CLI for AI agents. An agent skill from sanity-io/sanity.

sanity-io/sanity

Runs controlled JMH experiments on the Caffeine cache to find shared contention and hot-path waste, then reviews correctness and returns a reviewable patch.

ben-manes/caffeine

Guide for writing correct code with the compromise rule-based NLP library: tagging, match syntax, in-place transforms and common tasks like tense changes and redaction.

spencermountain/compromise

Walks an agent through working inside the Megatron-LM CI container and changing dependencies with uv, so lock files resolve the same locally and in CI.

NVIDIA/Megatron-LM

Update and review cherrypicklog.md, the todo list of upstream commits not yet cherry-picked into the fork's target branch.

komikku-app/komikku

Prepares the triage meeting summary for WinAppSDK Needs-Triage issues, with research-backed area suggestions, draft replies and a diff since the last triage.

microsoft/WindowsAppSDK

Answers questions about Mobilerun, the LLM-agent framework for automating Android and iOS devices, by pointing the agent to the right page of its v5 documentation.

droidrun/mobilerun

Reviews Cherry Studio branches, pull requests, commits, files and docs against the project's own architecture, naming, API-boundary and UI rules, report-only by default.

CherryHQ/cherry-studio

Reference help for the CCXT library covering crypto exchange APIs, market data, trading and order management across 150+ exchanges in JavaScript, Python and PHP.

2025Emma/vibe-coding-cn

Do not trigger automatically; only run when a user runs /bump-dart.

flutter/flutter

Maintainer workflow for preparing, publishing, verifying and curating Hunk releases, with confirmation gates before tags, publishes and public edits.

modem-dev/hunk

Repairs a broken OpenCLI site adapter after a command fails: collects a trace, patches only the adapter, retries, and files an upstream GitHub issue once fixed.

jackwener/OpenCLI