Build cross-platform Node theme-detection library in TypeScript, then pivot to napi-rs Rust core
Session from pi-coding-sessions on Hugging Face by championswimmer · MIT · condensed by Coders Talk
Implement an initial TypeScript CLI/TUI library that detects light/dark system theme across macOS, Windows, and Linux, with full build/test tooling, then research and plan a pivot to a Rust-native napi-rs implementation.
- +0Prompt · +0Implement the initial setup plan, add TS, tests, and build/dist setup for a cross-platform system theme detector.
- +0mAgent did · +0mExplored repo, read plan/AGENTS.md, and checked latest versions of typescript, vitest, tsup, eslint and related tooling packages via npm view.
- +1mAgent did · +1mWrote package.json, tsconfig.json, tsup.config.ts, vitest.config.ts, eslint.config.mjs, .prettierrc, and updated .gitignore to scaffold the TS build/test/lint setup.
- +2mAgent did · +2mImplemented core library: types, errors, logger, exec adapter, parsers, and per-platform theme detectors/monitors for macOS, Windows, and Linux (portal, gnome, kde, xfconf), wired together in client.ts and index.ts.
- +3mAgent did · +3mAdded vitest tests for parsers, fallback logic, and client, plus a fake-exec test helper and a GitHub Actions CI workflow.
- +4mFail · +4mnpm run check failed: ESLint errored loading a typescript-eslint rule config, then after a fix a TypeScript compile error surfaced in exec.ts.
- +4mAgent did · +4mRewrote eslint.config.mjs to fix the rule-loading error and began investigating the remaining TS2322 type error in exec.ts.
- +5mPrompt · +5mPivot: for native macOS/Windows/Linux parts, use napi-rs with Rust only (no Swift/C#). Research the best setup and write a new plan doc in .agents/plans/, including GitHub workflows to build for multiple architectures/OSes.
- +5mAgent did · +5mResearched napi-rs project structure, packaging (napi build/create-npm-dirs/pre-publish), CI matrix builds, and Rust crates/APIs for theme detection on macOS (objc2), Windows (registry), and Linux (zbus/portal), pulling reference code from napi-rs package-template and the dark-light/system-theme crates.
- +9mOutcome · +9mDelivered a new 259-line plan doc (.agents/plans/01-napi-rs-rust-native-architecture.md) covering repo structure, napi-rs packaging, per-OS Rust detection strategy, phased implementation, testing, and CI matrix strategy; original TS implementation's lint/typecheck issue was left unresolved when scope pivoted.
Next time I'd state the native-Rust/napi-rs requirement up front instead of letting the agent build a pure-JS/exec-shell-command implementation first, since that whole approach got shelved once I clarified I wanted Rust-only native bindings. The research-then-plan correction did the real work here — pausing before more code got written and getting a solid architecture doc instead of continuing to patch the JS-based detectors. I still need to actually verify the TS build/lint/test setup works cleanly since the last 'npm run check' run hit errors that weren't confirmed fixed before the pivot.