Skills
97,222 packaged capabilities and playbooks for agents. Install any of them with one command.
Testing & quality
Audit column types and precision — money stored as float/double (severity 5), naive timestamp vs timestamptz/UTC, jsonb used to evade schema, enum-vs-lookup-table choice, and charset/collation (utf8mb4, case-insensitive collation). Module M4. Feeds the Design & Integrity score (Tipos category).
Guidelines for writing TUnit tests in .NET, including setup, assertions, async testing, and best practices. Use when writing unit tests with TUnit framework, setting up TUnit in a .NET project, or migrating from other test frameworks to TUnit.
Use this skill to enable Espresso's `AccessibilityValidator` against the Compose semantics tree via `enableAccessibilityChecks(...)` from `androidx.compose.ui:ui-test-accessibility` (for `ComposeUiTest`) or `androidx.compose.ui:ui-test-junit4-accessibility` (for `ComposeTestRule` / `AndroidComposeTestRule`). Covers the API surface, the auto-check after every UI-mutating action (`performMultiModalInput` is the lone exception), the manual `tryPerformAccessibilityChecks()` entry point, sharing the validator with Espresso via `AccessibilityChecks.enable()`, the API 34+ requirement, and the Robolectric inconclusive behavior (logs a `Log.w` warning and still installs the validator, but Robolectric does not faithfully drive accessibility services — b/332778271). Use when the developer asks "how do I enable a11y checks in a Compose test", "AccessibilityChecks.enable", "AccessibilityValidator throws on click", "robolectric a11y not supported", or "ComposeTestRule IllegalStateException".
Use this skill ONLY when the user EXPLICITLY requests filing an upstream issue for MoviePilot core, frontend, or an installed plugin, for example "反馈 issue", "提 issue", "报 bug", "给 MP 提 issue", "让上游修一下", "提交错误报告", "提问题", "提需求", "功能请求", or English "file an issue / report a bug / open an upstream issue / feature request". A bare problem report is not enough: diagnose locally first. This skill uses its own scripts under `scripts/`; it does not add or call dedicated Agent tools for collect / prepare / submit.
Use this skill to locate Compose semantics nodes from a UI test using `onNodeWithTag`, `onNodeWithText`, `onNodeWithContentDescription`, `onAllNodes*`, and `onRoot`. Covers the count contract (single-node finders fail on 0 or >1 matches; collection finders never throw on 0), the merged-vs-unmerged tree distinction, and why tagging in production beats text-matching from tests. Use when the developer reports "no node matched", "multiple nodes matched", "tag not found", "useUnmergedTree", "Modifier.testTag", or asks how to find a Button/Text/Icon in a Compose test. If the developer mentions onNodeWithText, onNodeWithTag, onNodeWithContentDescription, onAllNodesWithTag, onRoot, or merged tree vs unmerged tree, use this skill.
Automates the full PR lifecycle — create or update a pull request, then aggressively monitor CI checks and review feedback in a continuous loop, fixing failures and addressing comments until the PR is fully green. Also covers push, branch creation, and branch sync workflows.
Backend code quality for clean, production-ready, maintainable code. Adapts to the existing language, framework, and style. Covers functions, reusability, modern syntax, error prevention, readability, and security awareness. Use when writing, reviewing, or refactoring backend code for quality, maintainability, or production readiness.
Use when measuring Jetson Video Codec SDK or PyNvVideoCodec encode/decode throughput, comparing presets or surfaces, testing codec-worker capacity with authenticated samples and user media, or producing a clearly labeled documentation-derived planning estimate when representative media is absent. Also use for a video request limited to PSNR or SSIM, to apply the terminal scope response.
(NS) Senior Tech Lead code review on SOLID, clean code, performance, security, and testability. Use proactively after writing or modifying code, before opening PRs, after implementation closure, or when the user asks for a code review, PR review, or issue review gate — even if they do not name this skill. For GitLab issue execution with ISSUE_URL, use Issue review mode. Do NOT write code-review-report.md. Do NOT use for root-cause debugging (use ns-code-investigator).
Guard serialization and canvas-render pipeline performance against regressions. Use when modifying serializeTimelineDirect.ts or any hot path in the foreignObject/native render pipeline to ensure changes don't increase p95 frame-capture time.
Helps with Prowler repository CI and PR gates (GitHub Actions workflows). Trigger: When investigating CI checks failing on a PR, PR title validation, changelog gate/no-changelog label, conflict marker checks, secret scanning, CODEOWNERS/labeler automation, or anything under .github/workflows.
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.
Assesses and responds to incoming code review feedback on PRs (reviewer comments, requested changes), especially when suggestions are unclear, technically questionable, or scope-expanding. Use before implementing review suggestions to align on intent and keep changes minimal.
Review code changes in a feature branch before merging. Use when asked to review a branch, review changes, check a PR, or audit code before merge. Compares the current branch against the default branch (main/master) and categorizes issues by severity (Critical, Major, Minor) with actionable solutions.
Reviews the platform and integration version tables and the key-date table in an RHDH test-plan Jira issue against vendor lifecycle data and the release schedule, then applies the accepted edits. Covers OCP, ARO, OSD, ROSA, AKS, EKS, GKE, PostgreSQL, RHBK, and Quay rows. Use for "review the test plan for 1.11", "which platform versions should the 1.10 test plan list", "update the test plan dates", or a test-plan Jira URL or key such as RHIDP-1234.
Recompute and display the two database scores (Design & Integrity + Performance & Scale) from a findings JSON, without re-auditing. Use to re-show or refresh the scores after an audit, to re-score with a different paradigm profile, or to score a saved findings file.
Debug and fix a Sentry issue — find it (by link, ID, or search), pull full context (stack trace, breadcrumbs, trace, logs), optionally run Seer root-cause / autofix, apply the code fix, and resolve it via a `Fixes PROJECT-NAME-12A` commit/PR. Use when working a known error or hunting one down to fix.
Model interpretability and explainability using SHAP (SHapley Additive exPlanations). Use this skill when explaining machine learning model predictions, computing feature importance, generating SHAP plots (waterfall, beeswarm, bar, scatter, force, heatmap), debugging models, analyzing model bias or fairness, comparing models, or implementing explainable AI. Works with tree-based models (XGBoost, LightGBM, Random Forest), deep learning (TensorFlow, PyTorch), linear models, and any black-box model.
Review or implement interface accessibility for semantics, keyboard operation, focus, contrast, status communication, zoom, and assistive technology. Use when accessibility is explicitly requested, required by the product contract, or a changed interaction creates substantial accessibility risk. Do not activate for every visual edit or use it as a generic design audit.
Enforce testing best practices when writing, reviewing, or improving tests. Covers TDD/red-green-refactor, property-based testing, real objects over mocks, correctness by construction, assertion quality, E2E/contract tests, flaky-test upgrades, mock-reality drift, mutation-style gap analysis, and sabotaged/skipped/weak tests. Use when writing tests, reviewing test quality, fixing flaky tests, improving coverage quality, or when the user mentions TDD, testing, coverage, mocks, invariants, types vs tests, defense in depth, fuzzing, generative testing, or test quality.
Language-agnostic testing principles for choosing which tests a change needs, test quality, and proof ownership, with frontend and browser E2E implementation references. Use when writing tests, deciding test scope, or reviewing test quality.
Use this skill to triage the open PR queue before a release. Classifies every open PR into must-merge, candidate, superseded, or deferred; writes a working triage doc; and runs the merge loop end-to-end. Designed for the pre-release "PR speedrun" pass where a solo maintainer wants to clear the inbound backlog in a single session.
Catalog of common mistakes that break Claude Code agent and skill triggering, plus marketplace validation rules. PROACTIVELY activate for: (1) plugins installed but never trigger, (2) agents failing to route, (3) skills not appearing in discovery, (4) pre-release triggering audit, (5) migrating deprecated agent true flag, (6) zero-frontmatter SKILL.md files, (7) boilerplate in YAML descriptions, (8) abstract descriptions, (9) missing example blocks on fat agents above 2,500 words, (10) missing PROACTIVELY or Provides sections, (11) running validate_plugins.py, (12) auditing a plugin without contradicting earlier intentional refactors. Provides: anti-patterns, fixes, before/after examples, audit checklist, and validator rule index.
Best practices for building a Flutter UI package on Material: custom components, ThemeExtension theming, consistent APIs, widget tests, app_ui_package scaffolding. Use when creating a UI package, working inside one, or in an app that consumes one: adding or reviewing a widget, wiring design tokens, exporting through the barrel file, or writing tests for a widget under lib/src/widgets, which pump through the package's pumpApp helper, so prefer this over general test guidance even when the ask is only "write its tests". Also use it when asked to approve what this skill forbids: importing package:<name>/src/... per file, skipping the barrel to "only pull in what I use", or a parallel theme system. Triggers on any request naming a package of shared widgets and design tokens, such as "create a ui package", "add a design token", or "is it fine to import from src".
Scan React codebase for useEffect anti-patterns (derived state, event logic in effects, effect chains, prop-driven resets, missing cleanup, parent notifications, etc.) and propose idiomatic fixes. Based on React's "You Might Not Need an Effect" guide. Use when asked to audit, review, or clean up useEffect usage.
WordPress performance code review and optimization analysis. Use when reviewing WordPress PHP code for performance issues, auditing themes/plugins for scalability, optimizing WP_Query, analyzing caching strategies, checking code before launch, or detecting anti-patterns, or when user mentions "performance review", "optimization audit", "slow WordPress", "slow queries", "high-traffic", "scale WordPress", "code review", "timeout", "500 error", "out of memory", or "site won't load". Detects anti-patterns in database queries, hooks, object caching, AJAX, template loading, and editor-side performance.
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.