Effect testing and API skill

Alternatives in tooling

• Effect Schema

  Effect Schema as the one validation and typing layer for data crossing a trust boundary (requests, config, storage, third-party and LLM output), with branded ids, tagged errors, JSON Schema for tools, and round-trip plus property tests.

  Also applies to: astro-blog, astro-fullstack, mobile-expo, python-react, cloudflare-react-router, react-router, tauri-react, typescript-cli, typescript-api

• Git hooks (lefthook)

  lefthook git hooks that format and lint staged files, enforce Conventional Commits, and run the project's tests before push.

  Also applies to: astro-blog, astro-fullstack, mobile-expo, python-react, cloudflare-react-router, react-router, tauri-react, typescript-cli, typescript-api

• OpenTelemetry (OTLP) for Effect servers

  OpenTelemetry traces, logs and metrics over OTLP for the Effect server in typescript-api, astro-fullstack and react-router. One observability layer adds trace ids to the existing logs, exports nothing without an endpoint, and is tested with an in-memory tracer and a loopback OTLP receiver.

  Also applies to: astro-fullstack, react-router, typescript-api

• REST resource conventions

  Agent rules for naming and shaping HTTP resources (plural nouns, methods and status codes, one resource shape, cursor pagination, versioning), independent of framework and layout, plus an AGENTS.md section recording the project's choices.

  Also applies to: astro-fullstack, mobile-expo, python-react, typescript-api

• rr remote test runner

  Configures rr (github.com/rileyhilliard/rr) so the project's test, lint, and build commands can run on remote machines over SSH, with a committed .rr.yaml of named tasks, an AGENTS.md section, and the rr Claude Code plugin.

  Also applies to: astro-blog, astro-fullstack, mobile-expo, python-react, cloudflare-react-router, react-router, tauri-react, typescript-cli, typescript-api