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refactor(compiler)!: replace Babel with a Yuku-based compiler core for Router and Start - #8817

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compiler-rewrite/yuku

Draft

refactor(compiler)!: replace Babel with a Yuku-based compiler core for Router and Start#8817
Sheraff wants to merge 1555 commits into
mainfrom
compiler-rewrite/yuku

This pull request is big! We're only showing the most recent 250 commits

Commits on Oct 26, 2026
Commits on Oct 27, 2026
- fix(router-utils): decide extracted exports over the final env module
  
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- fix(router-utils): keep the `;` a statement starting with `(` relies on
  
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- fix(router-utils): clean a chain of orphaned local declarations of any length
  
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- test(router-plugin): a page-only effectful declaration moves even when the route module uses its import
  
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- fix(router-utils): move an effectful declaration whose import code that stays also reads; check effects after its first effect
  
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  3710b36
- test: effect order of effectful clusters moving with a split component or a handler (R64, R65)
  
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- test(start-plugin-core): a server fn handler's server-only imports load on the first call in SSR
  
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- feat(start-plugin-core): load server fn handlers on the first call, without running their module twice
  
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- fix(router-utils): move an effectful declaration reading a const the route module keeps (R67)
  
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- test(start-plugin-core): handler modules load on the first call in Vite and Rsbuild dev, Vue SFC builds
  
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- docs(start-plugin-core): server fn handler modules of the in-place provider
  
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- fix(router-plugin): declare each split importer right before its first reader
  
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- Merge R66 (lazy server-fn handlers without double run): t3/lazy-server-function-handlers
  
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- test(start-plugin-core): a Solid Start route edit that fixes a component that threw in the browser shows
  
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- test(start-plugin-core): the Solid Start fix-after-throw edit test waits for the throw only
  
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- fix(router-core): reload on a route update after a router boundary caught a render error
  
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- fix(router-utils): decide env roots, movable clusters and extraction in one fixed point
  
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- refactor(router-utils): one owner for claim overrides, fallback lookups, member writes and ASI
  
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- refactor(start-plugin-core): one final-build predicate and one registry publication guard
  
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- docs(router-utils): document the placement fixed point, the dead-pure refinement and the stats test contract
  
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- perf(router-utils): keep the consolidated placement and claim rules allocation-free on hot paths
  
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- Merge consolidation per coherence review (one reach fixed point, core claim rule, shared host helpers): t3/compiler-consolidation
  
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- test(start-plugin-core): cover nested server fn refusals, id paths, top-level for await, sideEffects lists, Hydrate new.target
  
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- test(router-plugin): cover writer fallbacks and namespace-imported route factories
  
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- test(router-generator): cover namespace-imported constructors and an empty route id
  
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- fix(router-utils): keep what an extracted export's module would read before the route module initialises it
  
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- refactor: drop compiler code no input can reach
  
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- Merge coverage gaps (targeted tests for unreached areas; delete proven-dead helpers): t3/compiler-coverage-gaps
  
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- refactor(router-utils): drop OutputBuilder's unused tokenStarts option
  
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  e86561c
- refactor(start-plugin-core): drop Rsbuild support for a server-fn provider environment other than ssr
  
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- refactor(start-plugin-core): keep providerEnvironmentName on the Vite options only
  
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- style(start-plugin-core): import order
  
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- fix(router-utils): keep imports a route module never read
  
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- Merge R73 (keep imports a route module never read): t3/preserve-import-provenance
  
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- fix(router-generator): keep __root.tsx the root route next to a __root/ directory
  
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- fix(router-generator): report files of one module used for two routes
  
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- fix(router-generator): only edit the route files the tree imports
  
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- refactor(router-utils): one predicate per placement rule
  
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- test(react-start-rsc): a server fn nested in a function only the split component calls
  
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- Merge consolidation 2 per second coherence review (one predicate per placement rule; RSC nested server fn row): t3/compiler-consolidation-pass
  
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- fix(router-utils): a file that stops parsing keeps its last facts
  
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  6a4baf9
- fix(router-plugin, start-plugin-core): hot updates stay in place after a route file's layout changes
  
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  bc02318
- fix(router-plugin): refresh id of an extracted component names its module
  
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- chore: changeset for the dev HMR fixes
  
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  8837185
- style(router-plugin): import order
  
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- fix(router-plugin, start-plugin-core): a file's hot update is of the modules its current plan produces
  
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- Merge HMR consistency fuzz fixes: t3/hmr-consistency-fuzzing
  
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- chore(deps): bump @rsbuild/core to 2.2.14 and @rspack/core to 2.2.9
  
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- fix(router-utils, router-plugin): hot updates follow the core's extraction decision
  
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- Merge R74 (Rsbuild 2.2.14 / Rspack 2.2.9: MultiCompiler stale-done fix): t3/362bbafa
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- chore(changeset): RSC CSS HMR on Rsbuild needs @rspack/core >= 2.2.9
  
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- refactor(router-utils): one mutation model behind every placement rule
  
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- fix(router-utils): re-plan until no new region falls back
  
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- test(router-utils): verify every emitted output against the plan's invariants
  
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- perf(router-utils): cheaper benign check and lazy mutable-read cache
  
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- Merge remote-tracking branch 'origin/compiler-rewrite/yuku' into t3/compiler-mutation-model-structural-pass
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- test(router-plugin): unparsed route row uses a grammar error SWC 2.2.9 still accepts
  
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- docs(compiler-test-utils): the Rspack HMR new-async-chunk gap is still present on 2.2.9
  
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- perf(router-utils): the mutation model and the eagerness test cost nothing on the common module
  
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- docs(router-plugin): what happens when re-planning does not settle
  
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- perf(router-utils): one reference shape, mutable readers precomputed
  
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- test(router-utils): an output holds an effect unit by any segment from its range
  
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  ebac639
- Merge structural pass (one mutation model; evaluation-based laziness; fallback rounds to the bound; TSR_COMPILER_VERIFY): t3/compiler-mutation-model-structural-pass
  
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  3bd46fd
- perf(router-utils): placement read caches keyed by output and member, not by string
  
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- perf(router-utils): placement does less bookkeeping
  
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  ce40af0
Commits on Oct 28, 2026
Commits on Oct 29, 2026
- fix(import-protection): the bundler witnesses TypeScript-erasable edges; delete the tsconfig reader
  
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- fix(import-protection): Rsbuild dev builds edge modules restored from the persistent cache again
  
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- perf(import-protection): locate without Vite's identity map; edge-module code on demand
  
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- docs(import-protection): erasable imports are judged by what the bundler keeps
  
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- refactor(compiler): delete unread ROUTE_HMR and Chain.headValue; one dependents-index row per path per compile
  
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- perf(compiler): a leading comment is no statement-start hazard
  
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  384ae08
- perf(compiler): raw facts list a module's imports in linear time
  
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- perf(start): orphaned declarations are cleaned only after a start-env edit
  
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  8c16be0
- perf(compiler): a frozen plan keeps its planner facts instead of a JSON copy
  
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- test(start): a server fn nested in a handler is registered on the server envs only
  
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  774eba0
- fix(compiler): a claimed region in a statement placement drops still renders in its owner
  
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- test(router-utils): the lazy handler module counts as an importing output in verify (d)
  
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- perf(router-utils): compiler source maps carry no sourcesContent
  
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  281a996
- fix(start-plugin-core): a dev client server fn stub names its file's revision
  
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  290b524
- fix(compiler): a dynamic import is an edge only of the outputs rendering it
  
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- test(router-utils): the overlapping-save and in-flight tests wait on their suspension, not on 5 ms
  
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- chore(router-utils): bump yuku to 0.26.0
  
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- perf(start-plugin-core): one server chunk for the router and server-fn providers on Rsbuild
  
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- fix(import-protection): Rsbuild dev `log: 'always'` reports a kept import SWC keeps on every compilation
  
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- test(import-protection): the bundler witness rows in Vite full-bundle dev
  
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  4620897
- fix(import-protection): dev `log: 'always'` asks `onViolation` at every compile, cached plans included
  
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  5035c81
- refactor(router-utils): drop the compiler core's unread fields, hooks and fingerprints
  
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- test(start-plugin-core): import-protection test hosts follow the core's EnvInfo and HostServices
  
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- refactor(compiler): drop the Edit.reason debug label
  
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- refactor(router-plugin): drop unread planner facts, recognition fields and dead host guards
  
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- refactor(router-utils): drop PolicyContext.memo and CompileOutput.fingerprint
  
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- refactor(router-plugin)!: derive the route HMR style from the host; remove plugin.hmr.style
  
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- refactor(router-plugin): the React refresh export list names module-level bindings only
  
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  4218125
- fix(router-plugin): the router planners read the route registry from HostServices.routes
  
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- refactor(router-core): the lazy wrapper's hot slot holds its first importer; HMR types only on /hmr
  
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- fix(router-core): one refresh per split-loader edit on webpack-style hosts
  
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- refactor(start-plugin-core): drop unread Start compiler options, facts and fields
  
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- refactor(import-protection): drop unread decide reports, judged origin and reporter knobs
  
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- refactor(router-generator): one event classification, leaner tree model, imports under the header
  
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- chore: drop tsconfig excludes of deleted snapshot and fixture directories
  
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- chore(compiler-test-utils): drop helpers only their own controls used, and unread result fields
  
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- chore(react-start-rsc): drop the test:unit target that ran no file
  
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- test: known-bug pins that passed become plain tests; KNOWN-BUGS lists the remaining pins
  
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- test(import-protection): comments say what they cite instead of a ruling number
  
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- docs: source, docs and test comments explain instead of citing ruling numbers
  
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- docs: Rsbuild compiler architecture, router plugin skill and planner docs say what the code does
  
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- refactor(import-protection): no export on declarations only their own module uses
  
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- refactor(compiler): no export on declarations only their own module uses
  
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- refactor: lint follow-ups of the cleanup (the last dependency kind, Vite's resolved sourcemap option)
  
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- refactor(router-plugin): one router planner, configured by one builder
  
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- refactor(compiler): drop the planner `prepare` phase
  
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- test(start-plugin-core): Start's router options follow one rule on Vite and Rsbuild
  
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- refactor(router-plugin): route HMR marks the split chunks' components
  
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- refactor(router-core): one dev-only hot slot for the lazy route components
  
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- test(router): drop in-process route HMR tests real pages cover
  
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- test(start-plugin-core): planner tests check names by shape, not by spelling
  
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- test(router-plugin): run the split-loader routes on Rsbuild too
  
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- refactor(router-plugin): the round records split components without a type of their own
  
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- test(router): pin the lazy hot slot's remaining transitions
  
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- test(router-plugin): a fixed split chunk shows after a failed hot import
  
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- fix(router-core): a kept hot import clears the failure the lazy wrapper held
  
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- test: guard production bundles and Solid's cold start against the dev hot slot
  
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- refactor(compiler): stage computePlacement
  
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- refactor(compiler): split AnalysisPlan into plan, kept diagnostics and freeze
  
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  1352893
- refactor(planners): word the core's kept-declaration warnings
  
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  3b8d548
- fix(compiler): one source-edges builder for Tier 0 and Tier 1
  
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- fix(compiler): a merged edge is located at the import that reads a binding
  
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  80f9b39
- refactor(compiler): the core cleans up function-scope orphans once
  
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- refactor(planners): leave function-scope orphans to the core
  
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- refactor(compiler): export the comma-aware list-item removal
  
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- fix(planners): remove object properties with the core's list helper
  
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  6021617
- perf(compiler): yield in dev for a module's own imports only
  
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- docs(compiler): the README maps placement's stages, freeze, edges and the orphan cleanup
  
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- perf(compiler): the orphan cleanup rejects a live binding first
  
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- fix(router-plugin, start-plugin-core): webpack-family source maps hold the compiled files' text
  
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- test: source-map tests assert the map holds the user's file
  
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- chore(e2e): the Rsbuild e2e apps and examples use the catalog @rsbuild/core
  
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  5ebce55
- refactor(compiler): one diagnostics reporter next to the warning ledger
  
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  63f0e57
- refactor(compiler): one eager-export warning, deduped by the ledger on every host
  
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  3b760f1
- refactor(compiler): the hosts' bundler-shaped helpers in their own section
  
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  05f12bb
- refactor(start-plugin-core): one bundler-free Start session for the Vite and Rsbuild hosts
  
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- refactor(router-plugin, start-plugin-core): the Vite hosts share derived loads and graph invalidation
  
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- fix(router-generator, router-plugin, start-plugin-core, router-cli): one generator session for every watch mode
  
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  3aaa735
- refactor(start-plugin-core): one route generator configuration for Start on Vite and Rsbuild
  
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- refactor(router-generator, router-plugin): the generator owns the route files' real paths
  
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  bf940a0
- refactor(start-plugin-core): one opacity predicate for the summaries
  
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  35c78b8
- fix(start-plugin-core): a compile replaces its module's server functions in the registry
  
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  3e7df32
- fix(router-core, react-router): route HMR forgets the routes a rebuilt tree drops
  
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  6af7938
- chore: changeset for the server-fn registry following edits
  
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  8842e6b
- test(router-core): type the fake router's rebuilt route tree
  
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- refactor(start-plugin-core): one env shape for the registry snapshots
  
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- refactor(router-utils, router-plugin): the shared Vite host helpers live in the compiler's hosts
  
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- refactor(router-utils): drop the plan's unread summary digest and source length
  
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  and
  claude
  committed
  1ea4df0
- refactor(router-utils): module summaries carry no raw revision or import flag
  
  Sheraff
  and
  claude
  committed
  7c904e9
- refactor(router-utils): gates and prefetches get only what planners read
  
  Sheraff
  and
  claude
  committed
  0ea600f
- refactor(router-utils): drop unread core fields
  
  Sheraff
  and
  claude
  committed
  3a5b641
- refactor(router-plugin): the planners entry re-exports only the config type Start imports
  
  Sheraff
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  claude
  committed
  6dceee4
- refactor(start-plugin-core): the Rsbuild host uses the Start session's environment type
  
  Sheraff
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  claude
  committed
  17f5a54
- test(compiler-test-utils): drop harness fields no test reads
  
  Sheraff
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  claude
  committed
  5a887ae
- test(react-router): drop the unused click helper of the route HMR tests
  
  Sheraff
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  claude
  committed
  857cc37
Commits on Oct 30, 2026
- test(start-plugin-core): the .mdx import-protection warning is located
  
  Sheraff
  and
  claude
  committed
  9ca9d47
- docs: one router planner; placement rules point at placement/
  
  Sheraff
  and
  claude
  committed
  3a3e0b2
- fix(start-plugin-core, router-utils): load a virtual id through the environment that resolved it
  
  Sheraff
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  claude
  committed
  37f89d8
- fix(start-plugin-core): vite build --watch rebuilds against the edit
  
  Sheraff
  and
  claude
  committed
  7c3b46f
- chore: changeset for vite build --watch
  
  Sheraff
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  claude
  committed
  cb29f5b
- perf(start-plugin-core): Rsbuild dev server keeps the server's shared chunk only
  
  Sheraff
  and
  claude
  committed
  d21cdc4
- perf(start-plugin-core): Rsbuild retain returns when the file set is unchanged
  
  Sheraff
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  claude
  committed
  234f6be
- perf(start-plugin-core): Rsbuild replays restored-module checks in the first compilation only
  
  Sheraff
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  claude
  committed
  ef1373b
- test(start-plugin-core): a watch build's first build is reported, not thrown, on both bundlers
  
  Sheraff
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  claude
  committed
  a07a903
- perf(start-plugin-core): Start's Vite host builds maps only when the build wants them
  
  Sheraff
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  claude
  committed
  a05c723
- test(start-plugin-core): Rsbuild's persistent cache compiles a module again when its import changed meanwhile
  
  Sheraff
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  claude
  committed
  86ffa8a
- test(start-plugin-core): a watch rebuild forgets a deleted server fn module
  
  Sheraff
  and
  claude
  committed
  23d4beb
- test(e2e): the Rsbuild overlay spec reads the line from Rspack's file-less SWC code frame
  
  Sheraff
  and
  claude
  committed
  37e941d

Commits

Commits on Oct 26, 2026

Commits on Oct 27, 2026

Commits on Oct 28, 2026