A Go command-line tool with cobra commands, viper config (file, env, flags), structured errors with actionable suggestions, human and JSON output, testify tests with race detection and a coverage floor, and golangci-lint.
A terminal chat app for typescript-cli on OpenRouter: an OpenTUI chat screen and scriptable commands with NDJSON events, tools also served by a stdio MCP server, chats saved as JSON with Markdown export, and stubbed replay and eval checks.
A Bun-compiled TypeScript CLI with Effect commands and services, strict stdout/JSON contracts, lazy config, structured logs, Vitest, and compiled-binary tests.