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
SEE THE DIRECTORY
debug-traces
coval-ai/coval-external-skills
Troubleshoot Coval OpenTelemetry trace ingestion, missing trace UI, sparse traces, bad simulation or conversation correlation, auth/org errors, oversized payloads, duplicate spans, and production debugging with Trace Search.
langsmith-fetch
aaaaqwq/agi-super-team
Debug LangChain and LangGraph agents by fetching execution traces from LangSmith Studio. Use when debugging agent behavior, investigating errors, analyzing tool calls, checking memory operations, or examining agent performance. Automatically fetches recent traces and analyzes execution patterns. Requires langsmith-fetch CLI installed.
flutter-mcp-toolkit-debug
arenukvern/mcp_flutter
Diagnose problems in a running Flutter app — read logs, evaluate Dart expressions, interpret error envelopes. Use when something broke.
debug-log-analysis
oimiragieo/agent-studio
Structured debug log analysis for Claude Code sessions — auto-discovers most recent log, runs reducer, extracts error patterns, correlates with full log, produces observability report. Fills 5 identified gaps: hook error body capture, agent identity, file path tracking, stall correlation, success visibility.
debugging-workflows
github/gh-aw
Debug gh-aw workflows using run logs, audits, and failure triage.
web-perf
cloudflare/cloudflare-docs
Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (FCP, LCP, TBT, CLS, 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.
mastering-langgraph
spillwavesolutions/mastering-langgraph-agent-skill
Build stateful AI agents and agentic workflows with LangGraph in Python. Covers tool-using agents with LLM-tool loops, branching workflows, conversation memory, human-in-the-loop oversight, and production monitoring. Use when - (1) building agents that use tools and loop until task complete, (2) creating multi-step workflows with conditional branches, (3) adding persistence/memory across turns with checkpointers, (4) implementing human approval with interrupt(), (5) debugging via time-travel or LangSmith. Covers StateGraph, nodes, edges, add_conditional_edges, MessagesState, thread_id, Command objects, and ToolMessage handling. Examples include chatbots, calculator agents, and structured workflows.
claude-api
davila7/claude-code-templates
Build, debug, and optimize Claude API / Anthropic SDK apps. Apps built with this skill should include prompt caching. Also handles migrating existing Claude API code between Claude model versions (4.5 → 4.6, 4.6 → 4.7, retired-model replacements). TRIGGER when: code imports `anthropic`/`@anthropic-ai/sdk`; user asks for the Claude API, Anthropic SDK, or Managed Agents; user adds/modifies/tunes a Claude feature (caching, thinking, compaction, tool use, batch, files, citations, memory) or model (Opus/Sonnet/Haiku) in a file; questions about prompt caching / cache hit rate in an Anthropic SDK project. SKIP: file imports `openai`/other-provider SDK, filename like `*-openai.py`/`*-generic.py`, provider-neutral code, general programming/ML.
debugging
89jobrien/steve
Comprehensive debugging specialist for errors, test failures, log analysis,
typescript-sdk
contextvm/cvmi
Use the @contextvm/sdk TypeScript SDK effectively. Reference for core interfaces, signers, relay handlers, transports, encryption, logging, and SDK patterns. Use when implementing SDK components, extending interfaces, configuring transports, or debugging SDK usage.
docker-troubleshooting
full-stack-skills/docker-skills
Guidance for debugging and troubleshooting Docker issues. Covers container startup failures (exit codes, docker logs, inspect), disk space exhaustion (system df/prune, log rotation), OOM and resource pressure (memory limits, stats), network connectivity problems (network inspect, iptables, DNS resolution), storage issues (permission denied, volume inspection), daemon problems (dockerd startup, socket permissions), and common error diagnosis. Use when the user asks about docker troubleshooting, docker debug, OOM, disk full, network issues, docker not starting, container crash, or needs to investigate Docker problems. 使用场景：docker 排查、docker debug、容器问题、OOM、磁盘满、网络不通、启动失败、配置问题.
yaml-validator
d-o-hub/rust-self-learning-memory
Validates YAML syntax and structure for .yml/.yaml files. Use when editing, creating, or debugging YAML configuration files, GitHub Actions workflows, or CI/CD configs.
go-concurrency
geoffjay/claude-plugins
Advanced concurrency patterns with goroutines, channels, context, and synchronization primitives. Use when working with concurrent Go code, implementing parallel processing, or debugging race conditions.
langfuse
efoo-team/skills
Query, debug, and analyze LLM observability data from Langfuse via REST API. Covers traces, observations, sessions, scores, prompts, and datasets. Use when investigating agent behavior, debugging LLM calls, analyzing costs/latency, reviewing prompt versions, or auditing Mastra agent runs.
break-loop
mindfold-ai/trellis
Deep post-fix bug analysis across five dimensions: root cause categorization, fix failure analysis, prevention mechanisms, systematic expansion, and knowledge capture. Updates .trellis/spec/ guides with lessons learned to prevent recurring bugs. Use when a debugging session completes, after fixing a tricky bug, when the same class of bug keeps recurring, or when you want to capture debugging insights into project documentation.
python-observability
julianobarbosa/claude-code-skills
Python observability patterns including structured logging, metrics, and distributed tracing. Use when adding logging, implementing metrics collection, setting up tracing, or debugging production systems.
delegating-to-otto
astronomer/agents
Drives Astronomer's Otto agent (`astro otto`) as a delegated sub-agent for Airflow, dbt, and data-engineering work. Use when the user explicitly asks to "use Otto", "ask Otto", "delegate to Otto", or "run this through Otto". Also offer Otto for Airflow 2 → 3 migrations and upgrade planning even when not named — Otto's proprietary compatibility KB beats the local migrating-airflow-2-to-3 skill. Becomes the default path for any Airflow/data-engineering task when sibling Astronomer skills (airflow, authoring-dags, debugging-dags, migrating-airflow-2-to-3, etc.) are NOT loaded in the current session. Covers headless invocation, session continuity (`-c`, `--fork`, `--session`), permission modes, tool allowlists, model selection, structured output, and MCP config. **Do not load this skill if you are Otto** — Otto must not delegate to itself.
ci-debug
yonatangross/orchestkit
Diagnose a failing CI run against an 11-pattern playbook. Classifies the failure, cites the relevant memory entry, proposes the exact fix command — but NEVER applies without explicit user approval. Use when a specific PR check or GitHub Actions run failed and you want a diagnosis instead of speculation. Don't use for org-wide CI sweeps (that's /status) or for app-level test failures (the playbook is CI-infra-specific).
tvos-specific-patterns
kaakati/rails-enterprise-dev
Expert tvOS decisions for iOS developers: when to use custom focus effects vs system defaults, Siri Remote gesture trade-offs, Top Shelf content strategies, and 10-foot UI adaptation patterns. Use when building tvOS apps, debugging focus issues, or designing TV-optimized interfaces. Trigger keywords: tvOS, Focus Engine, @FocusState, isFocused, focusable, focusSection, Siri Remote, Top Shelf, TVTopShelfContentProvider, 10-foot UI, CardButtonStyle, large cards
performance-optimization
kaakati/rails-enterprise-dev
Expert performance decisions for iOS/tvOS: when to optimize vs premature optimization, profiling tool selection, SwiftUI view identity trade-offs, and memory management strategies. Use when debugging performance issues, optimizing slow screens, or reducing memory usage. Trigger keywords: performance, Instruments, Time Profiler, Allocations, memory leak, view identity, lazy loading, @StateObject, retain cycle, image caching, faulting, batch operations
ansible-debug
realsigridjin/hello-ansible-skills
Use when playbooks fail with UNREACHABLE, permission denied, MODULE FAILURE, or undefined variable errors. Use when SSH connections fail or sudo password is missing.
skill-trace-debugger
wyattowalsh/agents
>-
oxfmt
dobroslavradosavljevic/skills
Build, review, debug, configure, migrate, teach, or plan Oxfmt JavaScript/TypeScript formatting with current Oxc docs and a full usage guide. Use for oxfmt how-to, oxfmt.config.ts, defineConfig, .oxfmtrc.json, Prettier migration, --check/--write, printWidth, sortImports, sortTailwindcss Tailwind class sorting (stylesheet/config/functions), sortPackageJson, ignorePatterns, oxfmt-ignore, language support, Biome migration, Vite+ fmt, VS Code/Cursor .vscode/settings.json format-on-save, auto sort imports, remove unused via Oxlint source.fixAll.oxc, editors, CI format gates, and day-to-day format workflows.
qdrant-monitoring-debugging
github/awesome-copilot
Diagnoses Qdrant production issues using metrics and observability tools. Use when someone reports 'optimizer stuck', 'indexing too slow', 'memory too high', 'OOM crash', 'queries are slow', 'latency spike', or 'search was fast now it's slow'. Also use when performance degrades without obvious config changes.
ios-debugger-agent
openai/plugins
Build, run, and debug iOS apps on Simulator with XcodeBuildMCP. Use when launching an app, inspecting simulator UI or logs, or diagnosing runtime behavior.
docker-run
full-stack-skills/docker-skills
Guidance for running and managing Docker containers. Covers the complete container lifecycle (create/start/stop/rm/restart), resource constraints (--memory/--cpus), health checks (HEALTHCHECK), restart policies, logging drivers, container inspection (inspect/stats/top), exec debugging, and signal handling. Use when the user asks about docker run, container management, resource limits, health checks, docker logs, docker exec, restart policies, or needs to manage running containers. 使用场景：docker run、容器管理、资源限制、健康检查、重启策略、docker logs、docker exec、docker ps.
css-grid-math
lvtd-llc/skills
Derive and debug CSS Grid layout math for grid coordinates, line placement, spans, negative indexes, fr units, minmax(), fit-content(), repeat(), auto-fill, and auto-fit. Use when building grid systems, explaining track sizing, troubleshooting fr distribution, placing items by line numbers, or converting a layout sketch into CSS Grid formulas.
dspy-debugging-observability
omidzamani/dspy-skills
Use for debugging DSPy programs, inspect_history, tracing LLM calls, custom callbacks, observability, monitoring, and cost tracking.
debugging-surveys
posthog/ai-plugin
>-
oodle-traces
oodle-ai/agent-skills
Search and analyze Oodle traces by service, operation, duration, and error status.
bisect-ssa-pass
noir-lang/noir
Workflow for debugging SSA pass semantic preservation using the noir-ssa CLI. Use when a program's behavior changes incorrectly during the SSA pipeline - bisects passes to identify which one breaks semantics. The `pass_vs_prev` fuzzer finds such issues automatically.
apollo-debug-bundle
jeremylongshore/claude-code-plugins-plus-skills
Collect Apollo.io debug evidence for support.
mapbox-style-quality
mapbox/mcp-devkit-server
Expert guidance on validating, optimizing, and ensuring quality of Mapbox styles through validation, accessibility checks, and optimization. Use when preparing styles for production, debugging issues, or ensuring map quality standards.
ci-sentinel
yonatangross/orchestkit
Daily autonomous classifier for failing PRs across your repos. Runs /ci-debug headless against every open PR with red required checks, posts the verdict as a collapsed PR comment, and appends to a per-repo .sentinel/ledger.jsonl. v1 is propose-don't-apply — NEVER auto-pushes a fix. Use when you're tired of /status sweeps catching the same 10 CI failure patterns over and over.
debug:flask
snakeo/claude-debug-and-refactor-skills-plugin
Debug Flask applications systematically with this comprehensive troubleshooting skill. Covers routing errors (404/405), Jinja2 template issues, application context problems, SQLAlchemy session management, blueprint registration failures, and circular import resolution. Provides structured four-phase debugging methodology with Flask-specific tools including Werkzeug debugger, Flask-DebugToolbar, and Flask shell for interactive investigation.
debug:flask
snakeo/claude-debug-and-refactor-skills-plugin
Debug Flask applications systematically with this comprehensive troubleshooting skill. Covers routing errors (404/405), Jinja2 template issues, application context problems, SQLAlchemy session management, blueprint registration failures, and circular import resolution. Provides structured four-phase debugging methodology with Flask-specific tools including Werkzeug debugger, Flask-DebugToolbar, and Flask shell for interactive investigation.
ViewComponents Specialist
kaakati/rails-enterprise-dev
Specialist in ViewComponent implementation, component architecture, slots, previews, and method exposure patterns. Invoke this agent when creating or modifying ViewComponents, implementing component slots, setting up previews, debugging component rendering issues, or ensuring proper method delegation from services.
color-math-accessibility
lvtd-llc/skills
Calculate, review, and generate web color systems using RGB, HSL, LAB, OKLCH, contrast ratios, luminance, opacity, blend modes, and light/dark mode transformations. Use when auditing accessible colors, converting color models, deriving palettes, checking WCAG contrast, building theme tokens, or debugging opacity and CSS blend math.
unity-shader
cortexa233/game-dev-toolkit-skills
Hand-write, debug, convert, and optimize Unity ShaderLab/HLSL shaders across URP, HDRP, and Built-in Render Pipeline with cross-platform targets (mobile, PC, console, WebGL). Use for shader authoring, pipeline migration, BRDF or lighting work, shader performance tuning, Custom Renderer Feature or Custom Pass integration, and shader artifact troubleshooting.
arcade
valdesrosier/arcgis-skills
Author ArcGIS Arcade expressions for the correct profile and target version. Use when the user writes or debugs an Arcade expression for a popup, label, field calculation, or attribute rule, or asks which Arcade functions or globals are available.
configuring-zsh
mrpointer/dotfiles
Configure and troubleshoot Zsh shell. Use when editing .zshenv, .zprofile, .zshrc, .zlogin, or .zlogout, setting up powerlevel10k prompt, configuring oh-my-zsh or sheldon plugin manager, fixing PATH or environment variables, debugging slow shell startup, setting up completions/compinit/fpath, or working with zsh-autocomplete, zsh-autosuggestions, or zsh-syntax-highlighting plugins.
debug-fuzzer-failure
noir-lang/noir
End-to-end workflow for debugging SSA fuzzer failures from CI. Regenerates a reproduction from the CI seed with `just fuzz-repro`, then bisects SSA passes to identify the bug. Use when a `pass_vs_prev` or similar fuzzer test fails in CI.
debug:nextjs
snakeo/claude-debug-and-refactor-skills-plugin
Debug Next.js issues systematically. Use when encountering SSR errors, hydration mismatches like "Text content did not match", routing issues with App Router or Pages Router, build failures, dynamic import problems, API route errors, middleware issues, caching and revalidation problems, or performance bottlenecks. Covers both Pages Router and App Router architectures.
nextjs-best-practices
jgamaraalv/ts-dev-kit
Next.js App Router best practices — file conventions, RSC boundaries, data patterns, async APIs, metadata, error handling, route handlers, image/font optimization, bundling. Use when writing, reviewing, or debugging Next.js App Router code.
debug:angular
snakeo/claude-debug-and-refactor-skills-plugin
Debug Angular applications systematically with expert-level diagnostic techniques. This skill provides comprehensive guidance for troubleshooting dependency injection errors, change detection issues (NG0100), RxJS subscription leaks, lazy loading failures, zone.js problems, and common Angular runtime errors. Includes structured four-phase debugging methodology, Angular DevTools usage, console debugging utilities (ng.probe), and performance profiling strategies for modern Angular applications.
bun
dobroslavradosavljevic/skills
Build, review, debug, configure, migrate, teach, or plan Bun JavaScript/TypeScript work with current docs and a full usage guide. Use for bun runtime, bun install/add/remove/update/ci, bun.lock, workspaces catalogs overrides, trustedDependencies, bunx, Bun.serve, bun:sqlite, Bun.redis, Bun.SQL, Bun.file, Bun.$, bun test, bun build --compile, bunfig.toml, Node.js compatibility, --hot/--watch, and npm/pnpm/yarn migration to Bun.
plugin-authoring
abcfed/claude-marketplace
Use when creating, modifying, or debugging Claude Code plugins. Triggers on .claude-plugin/, plugin.json, marketplace.json, commands/, agents/, skills/, hooks/ directories. Provides schemas, templates, validation workflows, and troubleshooting.
dag-failure-analyzer
curiositech/some_claude_skills
Performs root cause analysis on DAG execution failures. Traces failure propagation, identifies systemic issues, and generates actionable remediation guidance. Activate on 'failure analysis', 'root cause', 'why did it fail', 'debug failure', 'error investigation'. NOT for execution tracing (use dag-execution-tracer) or performance issues (use dag-performance-profiler).
debug:svelte
snakeo/claude-debug-and-refactor-skills-plugin
Debug Svelte application issues systematically. This skill helps diagnose and resolve Svelte-specific problems including reactivity failures, runes issues ($state, $derived, $effect), store subscription memory leaks, SSR hydration mismatches, and compiler warnings. Covers both Svelte 4 legacy patterns and Svelte 5 runes-based reactivity. Provides debugging tools like $inspect(), {@debug} tags, and svelte-check CLI usage.
rails-jobs
marckohlbrugge/37signals-skills
Apply best practices for Rails background jobs using simple orchestration, idempotency, and safe retries. Use when creating, refactoring, or debugging Active Job and queue-backed workflows.
docker-axi
thatdudealso/docker-axi
Use docker-axi to discover, plan, build, run, debug, publish, inspect, and clean up Docker apps through safe TOON CLI workflows.
ask-gemini
hiroro-work/claude-plugins
Asks Gemini CLI for coding assistance. Use for getting a second opinion, code generation, debugging, or delegating coding tasks.
phx:trace
oliver-kriska/claude-elixir-phoenix
Trace Elixir call trees from entry points via mix xref. Use when debugging data flow, planning signature changes, or understanding how a bug reaches code.
css-math-units
lvtd-llc/skills
Explain, derive, and debug CSS math for measurement units, calc(), min(), max(), clamp(), custom properties, inheritance, em/rem scaling, percentages, viewport units, and box model formulas. Use when CSS dimensions compute unexpectedly, when mixing units, when building scalable spacing/type systems, or when reviewing box sizing and inherited values.
logging-performance-optimization
wojons/skills
Optimize logging performance including overhead reduction, async logging, buffering, sampling, and performance impact analysis for high-throughput systems
n8n-debugging
n8n-io/skills
Use when an n8n workflow isn't working, errors appear, results don't match what was expected, or the user says "this isn't working." Triggers on errors, unexpected output, "it's not working", "why is this happening", "the workflow stopped", failure investigation, or any debugging context.
k8s-troubleshoot
rohitg00/kubectl-mcp-server
Debug Kubernetes pods, nodes, and workloads. Use when pods are failing, containers crash, nodes are unhealthy, or users mention debugging, troubleshooting, or diagnosing Kubernetes issues.
deploy
databricks/app-templates
Deploy agent to Databricks Apps using DAB (Databricks Asset Bundles). Use when: (1) User says 'deploy', 'push to databricks', or 'bundle deploy', (2) 'App already exists' error occurs, (3) Need to bind/unbind existing apps, (4) Debugging deployed apps, (5) Querying deployed app endpoints.
debug:laravel
snakeo/claude-debug-and-refactor-skills-plugin
Debug Laravel applications systematically with this comprehensive troubleshooting skill. Covers class/namespace errors, database SQLSTATE issues, route problems (404/405), Blade template errors, middleware issues (CSRF/auth), queue job failures, and cache/session problems. Provides structured four-phase debugging methodology with Laravel Telescope, Debugbar, Artisan tinker, and logging best practices for development and production environments.
iterate
0xdarkmatter/claude-mods
Autonomous single-metric improvement loop - modify, measure, keep or discard, repeat (Karpathy autoresearch). One session, git as memory, bisect-on-regression. Triggers: iterate, improve autonomously, run overnight, keep improving, improvement loop, iterate until done.