Introducing Langy vs Pacwich

Langy is an automated AI engineer inside LangWatch: it reads your traces, writes Scenario tests and evaluations, opens PRs, and proves every fix in your CI.

Monorepo tooling that works on top of Bun, npm, and pnpm workspaces, with a CLI and TypeScript API.

About Introducing Langy

Langy is an automated AI engineer inside LangWatch: it reads your traces, writes Scenario tests and evaluations, opens PRs, and proves every fix in your CI. It is a full coding agent: it reads your production traces, writes Scenario tests and evaluations against what it finds, connects to your GitHub, opens a pull request on your actual codebase, and proves the change by running the simulations it wrote in your CI. You talk to it where your evaluation results already live, and what comes back is a diff with green checks attached.

About Pacwich

Monorepo tooling that works on top of Bun, npm, and pnpm workspaces, with a CLI and TypeScript API. This package is the continuation of the original, now deprecated, bun-workspaces package. bun-workspaces users can expect minimal to no changes on average. CLI global install: Your pacwich command will still resolve to a local install when available. bun add -g pacwich # Print help for installing completions pacwich completion # Attempt to automatically install completions for your shell pacwich completion install Local install: Note the pacwich command works in your package.json scripts even without a global install.