Development

Use when building HTTP servers with Bun.serve, handling requests/responses, implementing routing, creating REST APIs, or configuring fetch handlers.

Use when implementing hot reloading with Bun (--hot, --watch), HMR, or automatic code reloading during development. Covers watch mode, hot mode, and HTTP server reload.

Use when building APIs with Hono framework on Bun, including routing, middleware, REST APIs, context handling, or web framework features.

Use for Bun file I/O: Bun.file, Bun.write, streams, directories, glob patterns, metadata.

This skill should be used when the user asks about "bun:ffi", "foreign function interface", "calling C from Bun", "native libraries", "dlopen", "shared libraries", "calling native code", or integrating C/C++ libraries with Bun.

Use for Docker with Bun, Dockerfiles, oven/bun image, containerization, and deployments.

Convert PRDs to prd.json format for the Ralph autonomous agent system. Use when you have an existing PRD and need to convert it to Ralph's JSON format. Triggers on: convert this prd, turn this into ralph format, create prd.json from this, ralph json.

Generate a Product Requirements Document (PRD) for a new feature. Use when planning a feature, starting a new project, or when asked to create a PRD. Triggers on: create a prd, write prd for, plan this feature, requirements for, spec out.

'Detect codebase bloat through progressive analysis: dead code, duplication,

Configures GitHub Actions CI/CD workflows for testing, linting, and deployment. Use when setting up automation for a Python, Rust, or TypeScript project.

Convenes a multi-LLM expert panel to pressure-test hard-to-reverse decisions. Use when reversibility score is low and adversarial review is warranted.

Assesses decision reversibility and risk at critical checkpoints. Use when a workflow reaches a high-stakes branch needing escalation check.

Transforms project briefs into testable specifications with user stories and acceptance criteria. Use after brainstorming, before planning.

Transform specifications into structured implementation plans with architecture design and dependency-ordered task breakdown. Use when: converting specs to plans, designing architecture, breaking down tasks, estimating effort. Do not use when: no specification exists yet or still brainstorming approaches.

Scaffolds new projects with git, CI/CD workflows, pre-commit hooks, and build config. Use when starting a new Python, Rust, or TypeScript project from scratch.

Execute implementation plans systematically with checkpoint validation, progress tracking, and continuous quality gates. Use when: implementing tasks, executing plans, tracking progress, validating checkpoints. Do not use when: no implementation plan exists or still in planning phase.

Configure three-layer pre-commit quality system with linting, type checking, and testing hooks. Use when: setting up quality gates, configuring pre-commit, establishing code quality standards. Do not use when: pre-commit already configured optimally.

Generates Makefiles with testing, linting, formatting, and automation targets. Use when starting a project or standardizing build automation.

Selects architecture paradigm via research before scaffolding. Use when architecture is undecided and the choice needs justification and documentation.

Deep explanation of complex code, files, or concepts. Routes to expert agents, uses structural search, generates mermaid diagrams. Triggers on: explain, deep dive, how does X work, architecture, data flow.

Surface expert frameworks. Use when creating or evaluating skills, hooks, or agents.

Patterns for building production-quality CLI tools with predictable behavior, parseable output, and agentic workflows. Triggers: cli tool, command line tool, build cli, cli patterns, agentic cli, cli design, typer cli, click cli.

Atom of Thoughts (AoT) reasoning - decompose complex problems into atomic units with confidence tracking and backtracking. For genuinely complex reasoning, not everyday questions. Triggers on: atomise, complex reasoning, decompose problem, structured thinking, verify hypothesis.

**Version:** 1.0.0 **Purpose:** Visual regression testing with screenshot capture, comparison, and baseline management **Integration:** Playwright + SQLite + Redis coordination ---