fix(client): keep the server runtime adapters out of the index.client barrel (#3661) - #3675
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…he adapter graph `src/index.client.ts` is the browser/SSR-safe mirror of the `veryfront` root barrel. It re-exported `getEnv` from the broad `#veryfront/platform` barrel, which statically re-exports the eager runtime-adapter singletons (`detect.ts` → `denoAdapter`/`nodeAdapter`/`bunAdapter`). That dragged `DenoAdapter → DenoFileSystemAdapter → NodeCompatibleFileSystemAdapter` into the client bundle, where constructing it dereferences a browser-absent `fs.constants.O_NOFOLLOW` and aborts hydration (#3661) — the leak class #3025 sealed, resurfaced through a different transit barrel. `getEnv` is defined in the adapter-free leaf `platform/compat/process/env.ts` (already the canonical import for 12 other modules). Sourcing it there is behaviour-identical and removes the only static edge from the client barrel into the platform barrel, so the runtime adapters are no longer reachable. Adds a static-import boundary test that walks the value-import graph from `index.client.ts` and fails if it reaches any runtime adapter, guarding the whole regression class. Closes #3661.
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📝 WalkthroughWalkthroughThe client entrypoint now re-exports ChangesClient import boundary
Estimated code review effort: 3 (Moderate) | ~20 minutes Mergeability Score: 🟡 Moderate · up to The client barrel change removes the server adapter path, but the regression test can miss leaks when imports fail to resolve and does not run under Node or Bun. The PR should address these bounded verification gaps before merge. Possibly related issues
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A bare import-map key (`#veryfront/security`) maps only the exact specifier — it points at a file. The walker matched sub-paths against it too, mis-resolving `#veryfront/security/sandbox/*.ts` onto the barrel file and silently dropping the edge, so the graph under-reported (269 vs the ~342 the browser loads). Only trailing-slash keys map sub-paths. index.client still reaches zero runtime adapters — now proven over the full graph.
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Inline comments:
In `@src/index.client.boundary.test.ts`:
- Around line 68-77: Update the import-map resolution logic around bestKey and
mapped so unresolved `#veryfront/` specifiers throw an error instead of returning
null. Preserve null only when a matching key resolves to an external target such
as npm:, jsr:, or https:, and keep successful internal target normalization
unchanged.
- Line 1: Convert the regression test to the cross-runtime testing APIs so Node
and Bun runners do not exclude it. Replace all Deno references in the test with
readTextFile from the filesystem compatibility module and fromFileUrl from the
path compatibility module, and structure the tests using describe and it from
the BDD testing module while retaining assertions from the existing assertion
module. Preserve the current guard behavior across all affected checks.
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src/index.client.boundary.test.tssrc/index.client.ts
…lved specifiers Review follow-up on #3675. - Wrap the guard in `describe()`/`it()` from `#veryfront/testing/bdd.ts`, as AGENTS.md requires for `*.test.ts`. - Read repo files through `#veryfront/platform/compat/fs.ts` + `fromFileUrl` instead of the runtime global. The Node and Bun runners drop any test file whose source matches `/\bDeno\./` (`isDenoDependentTest` in `tests/node/run-tests.mjs`), so the guard had been running under Deno only. Verified green on all three runtimes. - Throw instead of silently returning null when a `#` specifier matches no import-map key: dropping that edge would drop the subtree behind it too. Mapped external targets (`#std/*` -> `jsr:*`) still resolve to null, as they have no source-tree path to walk. Guard behaviour is unchanged: it still reports the 7-module leak trace when pointed at a barrel that reaches the runtime adapters.
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Reviewed and merged. One measurement worth recording against the Walking Flagging only because merging closes #3661 automatically: if the remaining surface should stay tracked under that number rather than #3670, it will need reopening. Your judgement, not mine. Two smaller notes, neither blocking:
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Bug
On
veryfront dev, a client-tree route that reaches theveryfrontroot barrel drags the server/Deno runtime adapters into the browser bundle. During hydration the browser constructsDenoAdapter → DenoFileSystemAdapter → NodeCompatibleFileSystemAdapter, which dereferences a browser-absentfs.constants.O_NOFOLLOWand throws, aborting hydration (#3661). Green on0.1.1123, red on0.1.1231— a regression of the leak class #3025 sealed.Root cause
src/index.client.tsis the browser/SSR-safe mirror the import rewriter redirectsveryfrontto for a browser target. It re-exportedgetEnvfrom the broad#veryfront/platformbarrel:src/platform/index.tsstatically re-exportsgetAdapterfromadapters/detect.ts, which in turn statically re-exports the eager singletonsdenoAdapter/nodeAdapter/bunAdapter(new DenoAdapter()at module top level). So pulling one leaf helper (getEnv) through the barrel pulls the whole runtime-adapter graph — includingNodeCompatibleFileSystemAdapterand itsO_NOFOLLOWread — into the client chunk. A static import-graph walk fromindex.client.tsconfirms this is the sole path to the adapters.Fix
Source
getEnvfrom its adapter-free leaf,#veryfront/platform/compat/process/env.ts(where it is defined, and already the canonical import for 12 other modules). Behaviour-identical, and it removes the only static edge from the client barrel into the platform barrel — so the runtime adapters are no longer statically reachable from the client graph.Tests (red→green)
src/index.client.boundary.test.tswalks the static value-import graph fromindex.client.ts(skipping erasedimport typeand lazy dynamicimport(), resolving#veryfront/*via the import map) and fails if it reaches anyplatform/adapters/runtime/*/adapter.ts,*/filesystem-adapter.ts, ornode-filesystem-adapter.ts. Onmainit fails with a 7-module leak trace throughplatform/index.ts → detect.ts; with the fix it passes.deno check/deno lint/deno fmtclean; platform env + detect suites green.Scope
This fixes the O_NOFOLLOW hydration crash. The broader server→client surface the leak also exposed (
adapters/fs/veryfront/*,compat/process/command) is real but separate — it is the target of the fail-loud CI gate in #3670, which will catch it comprehensively. The defensiveO_NOFOLLOWoptional-chain guard in #3672 remains valuable defense-in-depth.Closes #3661.
Summary by CodeRabbit
Bug Fixes
getEnvAPI while ensuring it uses a browser-safe implementation.Tests