Tianyi Cui
630bbddf9a
dumble (0.2.x, ~530 dl/wk, single-maintainer) was a bus-factor risk as the load-bearing bundler. tsdown (rolldown-based, ~2.5M dl/wk, actively maintained) replaces it while output stays list-identical, verified by snapshot diff: 17 JS bundles, externals preserved, schemastery dual .mjs/.cjs and logger-console node+browser entries intact. Root tsdown.config.ts uses workspace globs ['vendor/*', 'packages/*'] (explicit, so examples/* stays excluded); two per-package overrides in vendor/ cover the special shapes and are logged in vendor/README.md as ours (not upstream sync surface). scripts/build.ts (dumble orchestration) is deleted; yarn build = tsc -b && tsdown. tsc -b keeps owning declarations (dts: false, clean: false). Rationale recorded in ADR 0008 (also covers the direct-esbuild and pkgroll alternatives). Gates: lint, typecheck, 134 tests, hygiene (knip/publint/constraints), demo smoke all green.