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Build repeatable eval suites that catch quality regressions in AI agent behavior before merge or release.

Expert Claude Code troubleshooting triage capability pack for diagnosing install failures, auth errors, MCP issues, sandbox blocks, and update regressions with source-backed triage matrices and privacy-safe support output.

Slash command that reviews a pull request diff for security regressions: authentication and authorization gaps, injection surfaces, secret exposure, unsafe deserialization, and dependency risk introduced by the change.

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.

PostToolUse hook that catches unintended UI changes by pixel-diffing a just-saved screenshot against its baseline with odiff.

Open-source Python framework for unit-testing LLM applications, agents, RAG pipelines, metrics, regression suites, and traces.

Expert reg-suit review skill for evaluating rendered UI image baselines, thresholds, snapshot storage, report artifacts, and visual QA release readiness.

Open-source evaluation and tracing framework for measuring AI agents, RAG systems, LLM apps, retrieval quality, feedback metrics, and trace-level regressions.

Slash command runbook for designing and running prompt evaluations: define tasks, success criteria, golden outputs, regression checks, and privacy-safe reporting using Anthropic test-and-evaluate guidance.

Source-backed guide for converting OpenAI Agents SDK traces into regression eval cases, trace grades, tool-call assertions, and release checks for agentic workflows.

A source-backed collection for building repeatable LLM eval and prompt testing workflows with open-source tools: prompt regression tests, RAG and agent metrics, human review datasets, traces, prompt optimization, and release gates.

Open-source framework from OpenAI for evaluating LLM and agent behavior with reusable eval definitions, grading logic, datasets, and regression workflows.

Source-backed Claude agent prompt for contributing to the official mui/material-ui monorepo using its AGENTS.md guidance, pnpm workspace filters, package build and test commands, component conventions, public error-message rules, API docs generation, visual regression and accessibility checks, and pre-PR checklist.

Source-backed agent for reviewing rendered frontend changes with screenshots, visual comparison evidence, viewport layout checks, keyboard/focus paths, accessibility scans, CLS risk, and privacy-safe QA artifacts.

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.

Validate MCP server tools with contract-style tests to catch schema drift, unsafe behavior, and integration regressions early.