Hono Operations

Hono on Cloudflare Workers: composing multi-app APIs in one Worker, middleware discipline, typed errors, validation at the HTTP boundary, SPA co-serving, RPC clients, and testing under vitest-pool-workers. Patterns here are distilled from a production multi-tenant Worker (one Hono app, 6+ mounted sub-apps, ~1350 tests).

Verified against Hono v4 (2026). Workers-first; the Node/Bun/Deno deltas and porting checklist live in references/runtime-adapters.md.

Staleness check: python scripts/check-hono-facts.py --offline asserts the version-bearing facts (Hono major, @hono/zod-validator, @cloudflare/vitest-pool-workers) are still named in the prose and the dated currency note above is present; --live confirms each package's npm major still matches. Catalog: assets/hono-facts.json.

Decision Tree