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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error-diagnostics-smart-debug
rmyndharis/antigravity-skills
Use when working with error diagnostics smart debug
debug:docker
snakeo/claude-debug-and-refactor-skills-plugin
Debug Docker containers, images, and infrastructure with systematic diagnostic techniques. This skill provides comprehensive guidance for troubleshooting container exit codes, OOM kills, image build failures, networking issues, volume mount problems, and permission errors. Covers four-phase debugging methodology from quick assessment to deep analysis, essential Docker commands, debug container techniques for minimal images, and platform-specific troubleshooting for Windows, Mac, and Linux.
dx-audit
justinramos101/agent-skill-kit
Audit an existing developer-experience surface: friction scoring, bug debugging, or pre-ship edge-case risk pass. Triggers: DX review, audit our API/SDK/CLI, is this error message OK.
debugging-toolkit-smart-debug
rmyndharis/antigravity-skills
Use when working with debugging toolkit smart debug
regex-master
nickcrew/claude-cortex
Use this skill when building, explaining, or debugging regular expressions for pattern matching, validation, or text extraction. Trigger phrases: ''write a regex'', ''match this pattern'', ''validate this format'', ''extract from text''. Not for natural language parsing or full grammar parsing (use a parser instead).
debug:pandas
snakeo/claude-debug-and-refactor-skills-plugin
Debug Pandas issues systematically. Use when encountering DataFrame errors, SettingWithCopyWarning, KeyError on column access, merge and join mismatches with unexpected NaN values, memory errors with large DataFrames, dtype conversion issues, index alignment problems, or any data manipulation errors in Python data analysis workflows.
debugging-dbt-errors
altimateai/data-engineering-skills
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godot-master
lanc3/godot-sight
Master Godot 4 development skill — the agent's brain for any Godot work in this project. Use proactively whenever Godot code, scenes, shaders, resources, or settings are being authored, refactored, debugged, reviewed, or planned — not only when the user explicitly asks. Triggers: writing or editing .gd / GDScript, modifying .tscn / .scn scenes, editing .gdshader / .gdshaderinc shaders, editing .tres / .res resources, changing project.godot or autoload list, working with input map / themes / .import files, suggesting any Godot API or class, designing a Godot system, picking GDScript vs C# vs GDExtension, optimizing a hot path, profiling, choosing physics / rendering / input / UI patterns, hooking up signals, building autoloads, anything that mentions Godot, GDScript, Forward+ / Mobile / Compatibility renderer, Jolt, AnimationMixer, NavigationServer, MultiplayerSynchronizer, Control nodes, or any Godot subsystem. Routes the agent to the right engine reference doc, the right specialist agent brief, the right path-scoped rule, and composes with the godot-sight runtime loop. Always consult before suggesting a Godot API — the LLM's training data is older than the pinned engine version.
routeros-app-yaml
tikoci/routeros-skills
RouterOS /app YAML format for container applications (7.21+ builtin app, 7.22+ custom YAML creation). Use when: writing or validating RouterOS /app YAML files, working with MikroTik container apps, building docker-compose-like definitions for RouterOS, creating /app store schemas, debugging /app validation errors, or when the user mentions /app, tikapp, or RouterOS container YAML.
update-spec
mindfold-ai/trellis
Captures executable contracts and coding knowledge into .trellis/spec/ documents after implementation, debugging, or design decisions. Enforces code-spec depth for infra and cross-layer changes with mandatory sections for signatures, contracts, validation matrices, and test points. Use when a feature is implemented, a bug is fixed, a design decision is made, a new pattern is discovered, or cross-layer contracts change.
trail
simota/agent-skills
Investigating git history, analyzing regression root causes, and performing code archaeology. Time-travels through commits to uncover truth. Use for git history investigation.
code-oss-logs
microsoft/vscode
Find and read timestamped process logs from Code OSS dev builds, including main.log, renderer.log, extension host logs, and agenthost.log. For bundles produced by Export Agent Host Debug Logs, use agent-host-logs.
debug:terraform
snakeo/claude-debug-and-refactor-skills-plugin
Debug Terraform infrastructure-as-code issues systematically. This skill helps diagnose and resolve Terraform-specific problems including state lock conflicts, provider authentication failures, resource dependency cycles, state drift detection, import failures, module version conflicts, and plan/apply errors. Provides TF_LOG debugging, terraform console usage, state manipulation commands, and CI/CD best practices for infrastructure automation.
tailwind-variants
dobroslavradosavljevic/skills
Build, review, debug, migrate, or plan Tailwind Variants class systems with current docs. Use for tailwind-variants, tv, createTV, cn, cnMerge, cx, VariantProps, slots, compoundVariants, compoundSlots, defaultVariants, extend composition, twMergeConfig, /lite build, class overrides, TypeScript props, Tailwind CSS v4 pairing, and upgrades from v0/v1/v2/v3.x.
dm-graph-traversal
cognitedata/builder-skills
CDF Data Modeling query-vs-list expert skill. Use for graph-native reads with instances.query, traversal payload design, failure debugging, pagination/dedupe semantics, and regression-proof tests (including Node.js/TypeScript parity checks).
debugging-local-replay
posthog/ai-plugin
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django-extensions
waldencui/claude-code-django
Django-extensions management commands for project introspection, debugging, and development. Use when exploring URLs, models, settings, database schema, running scripts, or profiling performance. Triggers on questions about Django project structure, model fields, URL routes, or requests to run development servers.
debug:rails
snakeo/claude-debug-and-refactor-skills-plugin
Debug Rails issues systematically. Use when encountering ActiveRecord errors like RecordNotFound, routing issues, N+1 query problems detected by Bullet, asset pipeline issues, migration failures, gem conflicts, ActionController errors, CSRF token problems, or any Ruby on Rails application errors requiring diagnosis.
glslviewer-shader-debug
openharmonyinsight/openharmony-skills
Adapt fragment shaders or runtime-shader snippets into standard GLSL, render them with glslViewer in headless mode, and inspect PNG output for shader debugging. Use when Codex needs to validate SDFs, gradients, masks, edge contours, or intermediate shader math by producing reproducible preview images from `.frag` files or translated shader snippets.
dx
justinramos101/agent-skill-kit
Audit, debug, or design a developer-experience surface — anything a developer installs, calls, or extends: API, SDK, CLI, setup and packaging, error messages, auth and API keys, config, IDE/editor integration, plugin contracts, telemetry. Existing surface: DX review, friction audit, 'is this error message OK', debugging a confusing integration failure, or a pre-ship edge-case risk pass. New surface: shape the public API, error envelope, auth model, config precedence, or plugin contract before it ships. Triggers: 'DX review', 'audit our API/SDK/CLI', 'design a new API/SDK/CLI', 'shape the public surface', 'what should we get right up front'. Do NOT use for docs as a reading surface (READMEs, changelogs, quickstarts, contributor docs, samples), for SDK/tool/error surfaces an agent consumes, or for end-user UX and visual UI.
docker-essentials
gpttang/skill-atlas
Essential Docker commands and workflows for container management, image operations, and debugging.
supabase
supabase-community/supabase-plugin
Use when doing ANY task involving Supabase. Triggers: Supabase products (Database, Auth, Edge Functions, Realtime, Storage, Vectors, Cron, Queues); client libraries and SSR integrations (supabase-js, @supabase/ssr) in Next.js, React, SvelteKit, Astro, Remix; auth issues (login, logout, sessions, JWT, cookies, getSession, getUser, getClaims, RLS); Supabase CLI or MCP server; schema changes, migrations, declarative schemas, security audits, Postgres extensions (pg_graphql, pg_cron, pg_vector); debugging and troubleshooting errors or unexpected behavior on Supabase projects (HTTP errors, Postgres errors, RLS surprises, permission denied, schema cache issues, timeouts, Edge Function crashes, Realtime drops, Storage failures) and reading or querying logs (Logs Explorer, ClickHouse).
kafka
dobroslavradosavljevic/skills
Build, review, debug, configure, migrate, teach, or plan Apache Kafka work from TypeScript with current docs. Prefer @platformatic/kafka as the TS SDK (Producer, Consumer, Admin, bootstrapBrokers, consume streams, ProduceAcks, transactions). Use for topics, partitions, consumer groups, offsets, acks, idempotence, EOS, compaction, retention, SASL/TLS, Schema Registry concepts, KRaft, Kafka 4.x, kafkajs migration, DLQ/outbox patterns, and broker ops that affect app produce/consume.
regression-test
peteonrails/voxtype
Run regression tests for voxtype releases. Use before major releases to verify core functionality, CLI commands, and configuration handling.
ios-memgraph-leaks
openai/plugins
Capture and inspect iOS leaks and memgraphs. Use when debugging leaked objects, retain cycles, memory growth, or before/after leak evidence.
wp-rest-api
firecrawl/agent-skills
Use when building, extending, or debugging WordPress REST API endpoints/routes: register_rest_route, WP_REST_Controller/controller classes, schema/argument validation, permission_callback/authentication, response shaping, register_rest_field/register_meta, or exposing CPTs/taxonomies via show_in_rest.
diagnosing-bugs
jorgealves/matt_pocock_skills
Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports something broken/throwing/failing/slow.
payment-module-development
qloapps/agent-skills
Use whenever creating, modifying, or debugging payment modules in QloApps — offline methods and online payment gateways. Covers PaymentModule class, payment hooks, checkout integration, validateOrder flow, API credentials, webhook handling, transaction logging, and refunds.
debug
iulspop/aidd-skills
Structured debugging skill for methodical root cause analysis. Use when investigating bugs, unexpected behavior, or errors. Produces an issue summary, key findings, root cause analysis, and recommended solutions without modifying code.
debug-logs
snaplogic/snaplogic-robotframework-examples
Helps debug test failures and view logs in the SnapLogic Robot Framework project. Use when the user wants to view test results, check container logs, debug specific test failures, or run environment diagnostics.
identify-reviewer
cloudflare/workerd
Identifies the local user's GitHub account and git identity before performing code reviews. Load this skill at the start of any PR review, code review, or commit log analysis so findings can be framed relative to the user's own prior comments, commits, and approval status.
wp-interactivity-api
firecrawl/agent-skills
Use when building or debugging WordPress Interactivity API features (data-wp-* directives, @wordpress/interactivity store/state/actions, block viewScriptModule integration, wp_interactivity_*()) including performance, hydration, and directive behavior.
wp-playground
firecrawl/agent-skills
Use for WordPress Playground workflows: fast disposable WP instances in the browser or locally via @wp-playground/cli (server, run-blueprint, build-snapshot), auto-mounting plugins/themes, switching WP/PHP versions, blueprints, and debugging (Xdebug).
kubernetes-debug
incidentfox/incidentfox
Kubernetes debugging methodology and scripts. Use for pod crashes, CrashLoopBackOff, OOMKilled, deployment issues, resource problems, or container failures.
figma-use
figma/dev-mode-mcp-server-guide
**MANDATORY prerequisite** — you MUST invoke this skill BEFORE every `use_figma` tool call. NEVER call `use_figma` directly without loading this skill first. Skipping it causes common, hard-to-debug failures. Trigger whenever the user wants to perform a write action or a unique read action that requires JavaScript execution in the Figma file context — e.g. create/edit/delete nodes, set up variables or tokens, build components and variants, modify auto-layout or fills, bind variables to properties, or inspect file structure programmatically.
render-optimization
yonatangross/orchestkit
React render performance patterns including React Compiler integration, memoization strategies, TanStack Virtual, and DevTools profiling. Use when debugging slow renders, optimizing large lists, or reducing unnecessary re-renders.
nodered
szkocot/skills
Expert guidance for Node-RED flow-based programming. Use when working with Node-RED flows (JSON), creating custom nodes, configuring settings.js, debugging flows, or integrating with MQTT, HTTP, WebSocket, and Home Assistant. Triggers on tasks involving flow design, node development, automation workflows, and IoT integrations.
docker
greedychipmunk/agent-skills
Build, run, debug, and manage Docker containers, images, compose files, networking, volumes, registries, Buildx/Bake, Scout/SBOM, Swarm, and Docker AI tooling. Use when the user mentions docker, containers, containerizing, Dockerfile, compose, image registry, volumes, or any docker subcommand.
debug-plan
cloudflare/agents
Create a systematic debugging plan for a bug report. Use when the user asks how to investigate a failure, regression, or unexpected behavior.
postgres-cli
dobby/postgres-cli-skill
Execute PostgreSQL queries and introspection with named project connections using `postgres-cli` V2. Use when the user asks to inspect data, run SQL, debug schema, validate config, or build schema cache artifacts.
python-descriptors-mro
narenaryan/agent-skills
Use when designing Python attribute protocols, multiple inheritance, or metaclasses — descriptor precedence, __set_name__, __slots__ interaction, C3 linearization rules, super() order, "MRO conflict" TypeError; applies when building validators, ORM fields, property-like wrappers, or debugging surprising attribute lookups
threejs-game-director
raptoravis/threejs-game-skills
Primary entrypoint for complete Three.js browser game creation and premium iteration. Use by default for build-a-game, upgrade, polish, premium, AAA, high-fidelity, showcase, from-scratch, endless runner, arcade, action, or release-ready requests. Orchestrates sibling skills for gameplay, AAA graphics, UI, debug/profile, and QA/release, plus 3D/image/audio generators for characters, vehicles, weapons, buildings, props, skies, textures, logos, icons, GUI art, and SFX/voice. Keeps skill-loading, reference, asset-sourcing, and phase ledgers so users never choose skills manually.
boxlang-core-dev-runtime-architecture
ortus-boxlang/skills
Use this skill when understanding BoxLang internals: BoxRuntime services, IBoxContext hierarchy, scope chain resolution, DynamicObject, type system (IBoxType), parsing pipeline (source to bytecode), class loader isolation, virtual threads, or using --bx-printast for AST debugging.
flaky-hunter
archive228/loopkit
Diagnose and fix tests that pass sometimes and fail other times. Use when CI is red intermittently.
dotnet-mcp-builder
github/awesome-copilot
Build Model Context Protocol (MCP) servers in C#/.NET against the current ModelContextProtocol 2.x NuGet packages. Helps with cases the model gets wrong without guidance — stale versions (0.x preview or 1.x-era defaults), the v2 stateless-by-default HTTP flip, the 2026-07-28 spec deprecations (roots/sampling/logging), MCP Apps and Tasks extension packages, elicitation URL mode, per-session HTTP wiring, OAuth and reverse-proxy deploy specifics, and debugging MapMcp / STDIO / Streamable-HTTP errors. Also covers STDIO and Streamable HTTP transports (SSE is deprecated), tools, prompts, resources, completions, and a basic .NET MCP client. Trigger when the user says or implies any .NET MCP server work: ModelContextProtocol, McpServerTool, MapMcp, WithStdioServerTransport, "MCP server in C#", "MCP tool in dotnet", "expose this as MCP", or names a primitive (prompt/resource/elicitation/MCP App) in a .NET context. Skip for MCP work in other languages.
module-registry
cloudflare/workerd
Load when working with the module registry in workerd — reading, modifying, debugging, or reviewing module resolution, compilation, evaluation, or registration code. Provides pointers to three reference documents covering the legacy registry, V8 module internals, and the new registry design.
plc-skill
migo-ovo/plc-skill
Vendor-aware PLC engineering skill for IEC 61131-3 logic design, review, debugging, refactoring, and documentation routing.
Debugging
binhmuc/autobot-review
Systematic debugging framework ensuring root cause investigation before fixes. Includes four-phase debugging process, backward call stack tracing, multi-layer validation, and verification protocols. Use when encountering bugs, test failures, unexpected behavior, performance issues, or before claiming work complete. Prevents random fixes, masks over symptoms, and false completion claims.
bug-root-cause-finder
dykyi-roman/awesome-claude-code
Root cause analysis methods for PHP bugs. Provides 5 Whys technique, fault tree analysis, git bisect guidance, and stack trace parsing.
contentful-personalization
contentful/skills
Implement, extend, and debug Contentful personalization. Use onboarding for new, project-wide, or unknown setups; use extend-existing only for scoped work on an explicitly working integration. Trigger keywords: personalization, optimization, ninetailed, A/B test, experiment, multivariate test, targeting, audience targeting, segments, variants, content variants, set up personalization, implement personalization, enable personalization, personalization not working, personalization broken, personalize this component, am I ready for personalization, experience API, Contentful Experiences, Experiences SDK, Studio Experiences, personalization in Next.js, @contentful/optimization, @ninetailed/experience.js, run an experiment, check this URL, debug this live page, inspect network requests, check console errors, experience.ninetailed.co
tech-stack-recommendations
sorawit-w/agent-skills
Opinionated technology stack guidance for new projects and migrations. **You MUST use this skill whenever the user is starting a new project, picking a runtime (Bun/Deno/Node), choosing a frontend framework, database, auth provider, hosting platform, styling system, mobile stack, i18n library, or AI-agent framework that the project doesn't yet have, setting up a monorepo, or migrating between stacks.** Do not assume a stack decision is too obvious to need this skill — consult it before recommending any specific technology. Does NOT trigger on: debugging existing code, maintaining or extending the current stack's existing components, library-version or package-manager migrations within the same stack, configuring tools already installed, or 'how do I do X in [framework I already use]' questions.
linear-solvers
beita6969/scienceclaw
Select and configure linear solvers for systems Ax=b in dense and sparse problems. Use when choosing direct vs iterative methods, diagnosing convergence issues, estimating conditioning, selecting preconditioners, or debugging stagnation in GMRES/CG/BiCGSTAB.
golang-context
marcioaltoe/skills
Idiomatic context.Context usage in Golang — propagation through API boundaries, cancellation, timeouts and deadlines, request-scoped values, context.WithoutCancel for background work outliving requests. Apply when designing context propagation across layers, debugging leaked or unexpired contexts, choosing between context.Background/TODO/WithoutCancel, or storing values in context. Not for code that merely accepts ctx as first parameter.
regression-modeler
zebbern/claude-code-guide
Run regression analysis (OLS or logistic) on uploaded CSV/Excel data, generating coefficients, R², p-values, VIF, and plain-language interpretation. Triggered by requests for regression modeling, fitting data, testing significance, checking multicollinearity, or keywords like OLS, logit, coefficient, p-value, or R-squared.
debug-browser-session
kernel/skills
Systematically debug a Kernel cloud browser session — VM issues, network errors, Chrome crashes, page-load failures, and live-view problems. Use when a browser session misbehaves (e.g. ERR_HTTP2_PROTOCOL_ERROR, "browser not responding", blank/error pages, captcha or "checking your browser" blocks, live view not loading) and you have the session ID. Drives the Kernel CLI to inspect session status, screenshots, page state, VM logs, network connectivity, and telemetry events (which remain readable even after the session is deleted).
awf-debug-tools
github/gh-aw-firewall
Practical Python scripts for debugging awf - parse logs, diagnose issues, inspect containers, test domains
dbt-runner
sleeplessv/relentless-data-skills
Use when running any dbt command (build, run, test, compile, seed, deps) or debugging a dbt failure — connection and auth errors, parse errors, hanging or silently-empty runs, and dbt-fusion quirks. Enforces preflight checks and output-capture discipline before the first dbt invocation of a session, and maps error signatures to causes and fixes. Bootstraps a per-project .dbt-runner/context.md on first use.
warp-debug-gradients
nvidia/skills
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log-driven-debugging
patrick-fu/awesome-skills
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java-best-practices-debug-analyzer
dawiddutoit/custom-claude
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