1,660 free skills
Debugging skills
Skills for systematic debugging — reproducing bugs, reading stack traces, bisecting regressions, and diagnosing flaky failures.
Sourced from real, public repositories — synced daily, never invented.
1,660 free skills
Skills for systematic debugging — reproducing bugs, reading stack traces, bisecting regressions, and diagnosing flaky failures.
Sourced from real, public repositories — synced daily, never invented.
15 tools across six categories
13 of them never send your data anywhere
Free · No signup · No trial clock
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debug
fcakyon/phd-skills
Evidence-before-action diagnosis of failing ML experiments. Probes the system before guessing causes, process list, dmesg, GPU stats, log scrollback, checkpoint state, then states a hypothesis as a hypothesis and runs a smoke before claiming a root cause. Use when the user asks why a run is failing, diverging, OOMing, hanging, slow, producing weird metrics, has crashed, or asks to debug, diagnose, troubleshoot, or investigate a training issue.
regression-sweep
transilienceai/communitytools
Re-validates every previously-confirmed finding against its current target — detects drift (patched, mitigated, re-introduced). Cron-driven weekly sweep across the org's validated finding tree.
structured-logging
majesticlabs-dev/majestic-marketplace
Production logging patterns for observability and incident debugging. Structured JSON logging, correlation IDs, context propagation, log levels, and performance. Use when implementing logging, adding observability, or debugging production systems. Triggers on logging setup, logger configuration, observability, distributed tracing, or incident response workflows.
kubernetes-ops
cowork-os/cowork-os
Kubernetes cluster operations: kubectl commands, manifest generation, Helm charts, RBAC, debugging, and deployment strategies.
profile-investigator
lytics/agent-skills
Diagnose why a user is or isn't in a segment, and trace their data lineage. Use when the user wants to understand segment membership, debug why a profile qualifies or doesn't qualify, or trace data lineage.
voltra
callstackincubator/voltra
Build, review, refactor, configure, or debug Voltra code using Voltra JSX, Voltra JS APIs, the Expo config plugin, and the Voltra CLI. Use when the user asks about charts, Live Activities, Dynamic Island UI, iOS widgets, scheduled widgets, Android widgets, ongoing notifications, image handling, app.json plugin config, React Native CLI setup, or Voltra push update flows.
deliverability-test-public
growthenginenowoslawski/coldoutboundskills
Compare reply rates, bounce rates, and positive reply rates broken down by inbox type (SMTP / Gmail / Outlook) for a Smartlead account. Use when you want to know "which inbox type delivers best" or when debugging unexplained deliverability differences across a mixed fleet. Operates via Smartlead API only (no database required).
shadergraph-editor
tomkrikorian/visionosagents
Author, load, and troubleshoot Reality Composer Pro Shader Graph materials for RealityKit on visionOS. Use when building Shader Graph materials, exposing promoted inputs for runtime control, debugging exported USD and MaterialX interop, or building shader graphs programmatically in Swift on visionOS 27.
debug:flutter
snakeo/claude-debug-and-refactor-skills-plugin
Debug Flutter applications systematically with this comprehensive troubleshooting skill. Covers RenderFlex overflow errors, setState() after dispose() issues, null check operator failures, platform channel problems, build context errors, and hot reload failures. Provides structured four-phase debugging methodology with Flutter DevTools, widget inspector, performance profiling, and platform-specific debugging for Android, iOS, and web targets.
flutter-debugging
vp-k/flutter-craft
Use when encountering any bug, test failure, or unexpected behavior in Flutter - requires systematic investigation before proposing fixes
web-performance-optimization
fcakyon/claude-codex-settings
Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge.
llvm-tooling
gmh5225/awesome-llvm-security
Expertise in LLVM tooling development including Clang plugins, LLDB debugger extensions, Clangd/LSP, and LibTooling. Use this skill when building source code analysis tools, refactoring tools, debugger extensions, or IDE integrations.
debugging
krzysztofsurdy/code-virtuoso
Systematic debugging methodology for finding and fixing bugs through root cause analysis. Use when the user encounters a bug, test failure, flaky behavior, production error, performance degradation, or integration failure. Covers the reproduce-investigate-hypothesize-fix-prevent workflow, evidence-based diagnosis, bug category strategies (logic errors, race conditions, memory leaks, integration failures), and post-mortem documentation.
log-analysis-parsing
wojons/skills
Parse, analyze, search, and extract insights from logs using various techniques including regex, parsing engines, and log analysis tools
debugging-log-analyser
mohitagw15856/pm-claude-skills
Parse error logs, stack traces, and crash reports into a structured root cause diagnosis. Use when an application is throwing exceptions, crashing, or producing unexpected errors and you need to understand why and what to fix. Produces a structured diagnosis with error classification, stack trace walkthrough, probable root cause with confidence level, affected code path, a concrete code-level fix suggestion, and ordered next debugging steps.
rails-debugger
majesticlabs-dev/majestic-marketplace
Use proactively when encountering Rails errors, test failures, build issues, or unexpected behavior. Analyzes errors, reproduces issues, and identifies root causes.
rca-report
bmad-labs/skills
Use when investigating and documenting a production incident, outage, data corruption event, or post-mortem — guides evidence collection during the investigation AND produces a rich, reproducible Root Cause Analysis report. Trigger on phrases like "write an RCA", "post-mortem for X", "document this incident", "what went wrong with...", "the pipeline broke yesterday, help me investigate", or any time the user is debugging a recently-resolved incident and wants a writeup. Also use proactively when the user finishes resolving an incident in-session and the resolution context is fresh — offer to capture it as an RCA before details fade.
otel-node
mizchi/skills
Node.js OpenTelemetry setup — SDK init, auto-instrumentation packages, and the esbuild ESM silent-failure gotcha (instrumentation-* packages produce no spans when bundled with esbuild --format=esm). Use when adding OTel to a Node.js/Hono/Express service or debugging missing spans after bundling. See devops/opentelemetry for signal design decisions.
tailwind-v4
boraoztunc/skills
Tailwind CSS v4 conventions for real projects — CSS-first configuration with @theme, automatic content detection, the v3-to-v4 migration diffs, and dynamic class-name safety. Use when writing Tailwind utilities, setting up or upgrading Tailwind, defining design tokens as Tailwind theme values, debugging classes that do not generate, or when unsure whether a project is on v3 or v4.
vscode-webview-expert
s-hiraoku/vscode-sidebar-terminal
This skill provides expert-level guidance for implementing VS Code WebView features. Use when creating WebView panels, implementing secure CSP policies, handling Extension-WebView communication, managing WebView state persistence, optimizing WebView performance, or debugging WebView rendering issues. Covers security best practices, message protocols, and VS Code-specific WebView patterns.
stuck
johnlindquist/claude
Get unstuck when blocked on a problem. Use when you've tried multiple approaches without success, or when debugging has hit a wall.
deployment
digitalocean-labs/do-app-platform-skills
Deploy applications to DigitalOcean App Platform via GitHub Actions with proper environment management and secrets handling. Use when setting up CI/CD pipelines, configuring staging/production environments, managing deployment secrets, or creating GitHub Actions workflows.
logging-best-practices
neondatabase/mcp-server-neon
Logging best practices focused on wide events (canonical log lines) for powerful debugging and analytics
typescript-master
tomlord1122/tomtom-skill
TypeScript language expert specializing in type system, generics, conditional types, and advanced patterns. Use when writing complex types, debugging type errors, or designing type-safe APIs.
javascript
htlin222/dotfiles
Write modern JavaScript with ES6+, async patterns, and Node.js. Use for JS development, async debugging, or optimization.
android-emulator
chunkytofustudios/flutter-skills
Run, debug, screenshot, and interact with a Flutter app on a running Android emulator via adb and the qemu console — boot/shut down an AVD, launch `flutter run` in the background, capture compact 360px-wide JPEG screenshots, dump the Android accessibility tree to find addressable widgets, tap by label or coordinates, long-press, swipe, and pinch-zoom (multi-touch). Use this skill whenever the user wants to launch, test, QA, take screenshots of, reproduce a bug in, verify a layout on, or otherwise interact with a Flutter app on Android — even when they don't say "emulator", "adb", or "screenshot" explicitly (e.g. "see what the home screen looks like", "try the new button", "check the layout on Pixel"). Auto-detects the project's applicationId, AVD, and `fvm flutter` vs `flutter`; falls back to ANDROID_EMU_* env vars.
nats-design-subject
trogonstack/agentskills
Design NATS subject hierarchies for messaging patterns (pub/sub, request/reply, streaming). Apply naming conventions, segmentation strategies, and wildcard patterns to create scalable subject architectures. Use when designing NATS messaging systems, choosing account-vs-subject namespace boundaries for multi-tenant communication, designing export/import subjects, or auditing existing subject hierarchies. Do not use for: (1) NATS server or account provisioning, (2) cluster setup, (3) client library implementation or connection code, (4) debugging connectivity or performance issues, (5) choosing between NATS and other messaging systems.
mcp-spy
johnlindquist/claude
Debug MCP server communication. Use for troubleshooting MCP integrations, viewing traffic, and analyzing latency.
elixir-idioms
oliver-kriska/claude-elixir-phoenix
OTP/BEAM patterns and Elixir idioms — GenServer, Supervisor, Task, Registry, pattern matching, with chains, pipes. Use when designing processes or debugging BEAM issues.
debug-node
mysticaltech/terraform-hcloud-kube-hetzner
Use when a Hetzner node is unreachable, SSH fails, cloud-init seems broken, or provisioning hangs. Boots into rescue mode via hcloud CLI to inspect filesystem, logs, SSH keys, sshd config, and cloud-init state without needing SSH access to the node itself.
postgresql-development-cloudbase
tencentcloudbase/skills
Use when building, debugging, or evaluating CloudBase PostgreSQL / CloudBase PG / PG mode apps, including Postgres schema setup, queryPgDatabase/managePgDatabase, JS SDK v3 app.rdb() CRUD/RPC, PG HTTP API fallback, RLS-style permissions, username-password auth, and Web CMS/admin CRUD flows backed by CloudBase PG.
kamal-deployment
faqndo97/ai-skills
Deploy containerized applications (especially Rails) to VPS using Kamal 2. Covers deploy.yml configuration, accessories (PostgreSQL, Redis, Sidekiq), SSL/TLS, secrets management, CI/CD with GitHub Actions, database backups, server hardening, debugging, and scaling. Use when setting up Kamal, configuring deployments, troubleshooting deploy issues, or managing production infrastructure with Kamal.
regex-builder
jmerta/codex-skills
Use when the user asks to create, debug, explain, validate, or optimize a regular expression or replacement for a specific engine. Verifies representative matches, non-matches, captures, escaping, portability limits, and backtracking risk in the target runtime.
systematic-debugging
sammcj/agentic-coding
Applies a modified Fagan Inspection methodology to resolve persistent bugs and complex issues. Use when several fix or debugging attempts have already failed and a methodical root-cause analysis warranting a Fagan inspection is needed. For first-pass diagnosis of a reproducible bug or regression use diagnose-hard-problem. Do not use for simple troubleshooting.
debug-mcp-stdio
adjfks/corner-skills
用于在 VS Code 中对 **Node.js 的 stdio MCP Server** 做断点调试（Attach 到 Node Inspector）。只要用户提到：MCP stdio、@modelcontextprotocol/inspector、node --inspect/--inspect-brk、VS Code attach 调试、断点不命中、sourcemap、调 build/dist 构建产物、端口 9229 冲突/被占用、launch.json 配置等，都要使用本 skill。输出应直接给出可复制粘贴的 launch.json 片段、可运行的 inspector 启动命令（含换端口版本）、以及按优先级排序的排障清单。
chrome-devtools
johnlindquist/claude-workshop-skills
Control and inspect Chrome browser using Chrome DevTools Protocol - navigate pages, debug network requests, analyze performance, take screenshots, interact with elements, and automate browser tasks.
debugging-local-replay
posthog/skills
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netlify-integration
tdimino/claude-code-minoan
Deploy and manage Netlify projects using Next.js with serverless functions, environment variables, and continuous deployment. Use this skill when working with Netlify deployments, configuring netlify.toml, managing Netlify Functions, debugging webhooks, setting environment variables, or troubleshooting deployment issues for Next.js applications on Netlify. Essential for Twilio-Aldea and similar serverless SMS/telephony projects. v2.0 includes official Netlify documentation, production patterns from Twilio-Aldea (webhook timeout solutions, background functions), and TypeScript code examples.
testplane-skill
gemini-testing/testplane-skill
Use when the user wants to write, debug, or inspect Testplane end-to-end/component tests, work with a Testplane HTML report, inspect Time Travel snapshots, use Testplane CLI/MCP browser tools, or interact with a web app through Testplane.
flutter-mcp-toolkit-guide
arenukvern/mcp_flutter
Entry point for inspecting or driving a running Flutter app from your AI assistant — routes to the right task skill (inspect / control / debug / custom app surfaces) and runs preflight.
ecto-constraint-debug
oliver-kriska/claude-elixir-phoenix
Debug Ecto constraint violations - trace triggers, check migrations, find duplicate data. Use when seeing unique_constraint, foreign_key_constraint, or check_constraint errors.
refactor:angular
snakeo/claude-debug-and-refactor-skills-plugin
Refactor Angular code to improve maintainability, readability, and adherence to best practices. Transforms large components, nested subscriptions, and outdated patterns into clean, modern Angular code. Applies signals, standalone components, OnPush change detection, proper RxJS patterns, and Angular Style Guide conventions. Identifies and fixes memory leaks, function calls in templates, fat components, and missing lazy loading.
iac-terraform
ahmedasmar/devops-claude-skills
Infrastructure as Code with Terraform and Terragrunt. Use this skill whenever the user mentions Terraform, Terragrunt, HCL, or infrastructure as code. Triggers include writing or reviewing .tf files, creating reusable modules, debugging terraform plan/apply errors, managing remote state and locks, fixing state drift, setting up CI/CD for Terraform, scaffolding new modules, validating module structure, and implementing Terragrunt DRY patterns across environments.
langsmith-trace
jackjin1997/clawforge
Use this skill for ANY LangSmith/LangChain observability question. Covers two topics: (1) Adding tracing to your application (LangChain/LangGraph or vanilla Python/TS with @traceable), and (2) Querying traces for debugging, analyzing execution flow, and exporting trace data.
buildkite
hjewkes/agent-skills
Buildkite CI/CD integration. Use when the user needs to check build status, trigger builds, read build logs, debug failures, manage pipelines, or any Buildkite workflow. Triggers include "buildkite", "build", "pipeline", "CI", "deploy", "build log", "build failed".
velt-crdt-best-practices
velt-js/agent-skills
Velt CRDT (Yjs) collaborative editing best practices for real-time applications. This skill should be used when implementing collaborative features using Velt CRDT stores, integrating with editors like Tiptap, BlockNote, CodeMirror, or ReactFlow, or debugging sync issues. Triggers on tasks involving real-time collaboration, multiplayer editing, CRDT stores, or Velt SDK integration.
devops-troubleshooter
rmyndharis/antigravity-skills
Expert DevOps troubleshooter specializing in rapid incident
runtime-evidence-debug
fudesign2008/open-skills
Default entry of the debug skill family when runtime observation is needed: static analysis stalled, a fix did not work, logs look correct but behavior is wrong, or fix verification needs before/after evidence. Covers escalation decision, targeted instrumentation (not shotgun logging), MRE reproduction, evidence tiers, confidence gating, escape hatches, and fix verification; composes with browser-debug-toolkit / hybrid-debug / channel enablers without demoting them. Triggers — 「打点调试」「打日志调试」「运行时调试」「运行时验证」「复现验证」「日志分析根因」「根因置信度不足」「静态分析碰壁」「修了还是不行」「日志正常但行为不对」「偶现」「调试默认入口」 / runtime evidence debugging, instrumentation debugging, escalate to runtime, evidence-driven debugging, fix didn't work, intermittent bug.
rxjs-implementation
pluginagentmarketplace/custom-plugin-angular
Implement RxJS observables, apply operators, fix memory leaks with unsubscribe patterns, handle errors, create subjects, and build reactive data pipelines in Angular applications.
telemetry-inspect
yonatangross/orchestkit
Inspects the OrchestKit telemetry pipeline for the current project — lists all known telemetry files with write counts, sizes, schema status, growth trend, and orphan detection. Use when verifying the observability pipeline is healthy, debugging a missing writer, or auditing which files have schema locks vs. which are drift-vulnerable. Read-only — never modifies telemetry files.
node-devtools-cli
serkan-ozal/browser-devtools-skills
CLI for debugging Node.js backend processes with non-blocking inspection. Use when the user needs to connect to Node.js processes (by PID, name, Docker, or port), set tracepoints/logpoints/exceptionpoints, capture call stacks and local variables, or inspect console logs. Requires daemon; connect before other debug commands.
refactor:express
snakeo/claude-debug-and-refactor-skills-plugin
Refactor Express.js/Node.js code to improve maintainability, readability, and adherence to best practices. Transforms callback hell, fat route handlers, and outdated patterns into clean, modern JavaScript/TypeScript code. Applies async/await, controller-service-repository architecture, proper middleware patterns, and ESM modules. Identifies and fixes anti-patterns including blocking event loop, improper error handling, forEach with async callbacks, and memory leaks.
debug:spring-boot
snakeo/claude-debug-and-refactor-skills-plugin
Debug Spring Boot issues systematically. Use when encountering bean errors like NoSuchBeanDefinitionException, circular dependency issues, application startup failures, JPA/Hibernate problems including LazyInitializationException and N+1 queries, security misconfigurations causing 403 Forbidden errors, property binding failures, CSRF token issues, or any Spring Boot application requiring diagnosis with Actuator endpoints and JVM debugging.
tailwind
dobroslavradosavljevic/skills
Build, review, debug, configure, or migrate Tailwind CSS projects using current Tailwind documentation. Use for Tailwind CSS v4 utilities, CSS-first configuration, theme variables, Vite/PostCSS/CLI setup, source detection, variants, responsive design, dark mode, Preflight, custom utilities, @apply/@reference, Prettier class sorting, and v3-to-v4 upgrades.
strk20-privacy-sdk
odinfree/strk20-skills
Build privacy wallets and key-holding backends with the Starknet Privacy SDK (@starkware-libs/starknet-privacy-sdk). Covers createPrivateTransfers wiring, register, deposit, transfer, withdraw, multi-op batches, shadow accounts (formerly private sub-accounts), note discovery, setup requirements, and proving configuration. Also use for debugging SDK submissions: provingBlockId, proofFacts, tip 0n, INVALID_NONCE, note maturity, fresh-account sequencing, and AddressMap lookups. If the app talks to the user's wallet instead of holding keys, use strk20-wallet-api. For concepts use strk20-privacy.
gradle-kotlin-dsl-doctor
jetbrains/skills
Generate, debug, and repair Kotlin + Spring Gradle builds with minimal, compatible changes. Use when `build.gradle.kts` or `settings.gradle.kts` is failing, plugins or toolchains are incompatible, dependency management is drifting from the Spring Boot BOM, test or runtime classpaths are broken, or a Kotlin DSL patch must be safe and incremental.
windbgskill
kwansy98/windbgskill
Control WinDbg via HTTP REST API for three scenarios - dump analysis (process crash dumps, kernel crash dumps / BSOD), live kernel debugging (KDNET, local kernel, VM kernel), and user-mode process debugging (attach to process, application crash). Use when the user mentions WinDbg, crash dump, .dmp file, BSOD, bugcheck, kernel debug, process debug, !analyze, breakpoints, or says the windbgskill plugin is running on a port number.
debugkit
mimukit/skills
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debug
whawkinsiv/solo-founder-skills
Use this skill when features break, users report errors, deployments fail, or tests don't pass. Guides systematic debugging: reproducing bugs, gathering diagnostic info, reading error messages, and working with AI tools to fix issues efficiently.
optimize-trace-observability
coval-ai/coval-external-skills
Improve Coval trace quality after basic ingestion works. Use when traces are sparse, missing useful STT/LLM/TTS/tool spans, missing attributes needed for Coval built-in metrics, or when a customer wants maximum debugging and observability value from agent traces.