AI Agent Skills

Investigate software defects and unexpected behaviour using read-only evidence before remediation. Use when the user asks to diagnose, find a root cause, explain a failu…

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…

Use this skill when something has gone wrong, looks wrong, or needs a second opinion. Triggers on: "something looks off", "this doesn't look right", "why is this happeni…

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.

Orchestrates comprehensive codebase research by decomposing user queries into parallel sub-agent tasks and synthesizing findings. This skill should be used when users as…

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.