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The official Codacy MCP server (@codacy/codacy-mcp) that gives AI assistants access to the Codacy API for code quality, security, and coverage — listing repository and pull-request issues, retrieving file coverage and duplication, searching security (SRM) findings, inspecting analysis tools and patterns, and running local analysis with the Codacy CLI.

Official Dart team Agent Skills for AI coding agents working on Dart unit tests, CLI apps, coverage, runtime errors, mocks, package conflicts, static analysis, Native Assets, FFI, ffigen, and pattern matching.

Official remote MCP server for connecting Claude and other AI coding tools to Cypress Cloud runs, failures, flake data, accessibility reports, and UI Coverage results.

Source-backed agent for turning Codecov patch coverage, project coverage, flags, components, carryforward behavior, PR comments, and changed-file context into targeted regression test plans.

Slash command that runs a pre-deploy readiness check for a Cloudflare Workers project before you ship.

Expert Vitest coverage planning skill for choosing providers, scoping reports, setting thresholds, triaging gaps, and designing practical coverage gates.

Claude Code statusline that reads Istanbul JSON summary output and compares current line coverage with a local baseline percentage.

A CLAUDE.md rule that drives test-first development with Vitest: write a failing Vitest test, add the minimum code to pass, then refactor. It covers vitest.config setup, expect assertions, vi mocks and fake timers, coverage thresholds, and running specs in watch mode or once with vitest run.

Automated documentation coverage analysis with missing docstring detection, API documentation validation, and completeness scoring. This PostToolUse hook automatically checks documentation coverage when code files are modified, providing real-time documentation quality validation during development.

Production codebase auditor specialized in Zod schema validation coverage, security vulnerability detection, and dead code elimination

Generates a comprehensive test coverage report when the coding session ends.

User-created Claude Code custom slash command recipe for planning deeper tests around a file or function, including edge cases, property-style invariants, regression cases, and mutation-score gaps where the project already supports those tools.

Plan SEO-forward content clusters that align search intent, topical coverage, internal links, and conversion pathways for AI tooling niches.

An automation bundle for keeping project documentation accurate and current: generate docs from code, measure documentation coverage, validate README structure and links, document API endpoints, and publish to a docs site.

A source-backed frontend QA collection for AI-assisted UI work: combine WCAG accessibility checks, Playwright browser automation, Storybook component context, Chrome DevTools inspection, BrowserStack coverage, and test hooks before shipping user interfaces.

A Claude Code SessionEnd hook that scans a project for dead code and writes a report to .claude/reports. It runs available tools per language: ESLint and Knip for JS/TS, autoflake or pylint for Python, Knip for unused npm dependencies, ripgrep for unreferenced src files, and jq to flag zero-coverage files.