AI Agent Skills

Decide whether a failing test run is the change's fault or was already broken on main, before retrying, reverting or blaming anyone. A red is a measurement, not a verdic…

Diagnose a failing test or reported defect, propose a fix, and apply it only with approval at each stage — investigate, then fix, then verify. Use for the same job as th…

Forces the laziest solution that actually works, simplest, shortest, most minimal. Channels a senior dev who has seen everything: question whether the task needs to exis…

Code review focused exclusively on over-engineering. Finds what to delete: reinvented standard library, unneeded dependencies, speculative abstractions, dead flexibility…

Modern Java 21 LTS engineering standards, Effective Java design patterns, clean code conventions, and build quality gates.

Guidelines for writing robust, modern Java tests using JUnit 5, Mockito, and Testcontainers.

Write the current session's in-flight work state to a human-readable handoff doc on disk (docs/context/CONTEXT-{topic}.md) so a future chat session — or another person —…

Turn a hard-won, multi-step procedure from the current session into its own small skill at ~/.claude/skills/learned-<slug>/SKILL.md, so future sessions load it when the…

Comprehensive E2E testing skill using Playwright MCP for systematic web application testing. This skill should be used when users need to test web-based systems end-to-e…

Detect and prevent overfitting to historical data via multiple testing corrections and pre-registration. Use when evaluating strategy variants to ensure performance is n…

Prevent train-test contamination, target leakage, and temporal leakage. Use when splitting data, fitting preprocessors, or engineering features for time-series ML.

Test strategy robustness to parameter variation and detect overfitting cliffs. Use when validating that performance is stable across parameter perturbations.

CLI guidelines. Use whenever using the Bash tool, which is almost always. Also use when you see "command not found: __zoxide_z" errors.

Formatting rules for Java code generators that build source code via string concatenation. Use when the user asks to "fix formatter-off", "fix code generation formatting…

Code quality guidelines. ALWAYS use skill for ANY code changes.

Create and maintain an HTML codebase walkthrough with ordered explanations, scroll-linked source highlights, and an iterative learning and review workflow. Use for guide…