pi-agent-dev

Expert guidance for building, modifying, debugging, and reviewing extensions for the pi coding agent (@earendil-works/pi-coding-agent): TypeScript modules that register tools, slash commands, event handlers, providers, and terminal UI through the ExtensionAPI. Locates the installed pi docs and examples so they match the running version, chooses the right integration point, applies the extension lifecycle, state, mode, and cleanup contracts, and starts from the closest official example. Use whenever the user mentions pi extensions, pi.registerTool, pi.registerCommand, pi.on, ExtensionAPI, pi packages, `pi --extension`, or asks how to add a tool, command, guard, status line, renderer, or provider to pi, even if they do not say "skill".

TypeScript language practices and coding guidelines for writing and reviewing TypeScript: strict compiler settings, narrowing over assertions, discriminated unions, validating unknown input at boundaries, async and AbortSignal cancellation, error handling, ESM import rules, module structure, tooling, test conventions, and a review checklist. Includes the constraints of code loaded through jiti (such as pi extensions), which transpiles without type checking. Use whenever writing, reviewing, refactoring, or configuring TypeScript (tsconfig, types, generics, async code, Node/ESM projects), even when the user only says "clean this up" or "review this .ts file".