fix(runtime): default the render mode toward production - #3844
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#3841 fixed the four SSR call sites that hardcoded `dev: true`. It did not fix the reason those sites were able to drift: every render-mode default in the runtime failed open toward development, so a call site that forgot to pass the flag silently got development semantics in production. Close the bug class. `LoadComponentOptions.dev` becomes required, so the loader entry points reject an omission at typecheck time rather than downgrading at runtime. The transform pipeline context, module server, RSC renderer, RSC manifest handler and data fetcher now default toward production, local becomes remote, and development becomes production. The RSC renderer default is the one with real latent severity: an omitted mode put the entire rendered tree into the RSC payload and selected the filesystem client module strategy. Every non-test caller of every one of these already passes the flag explicitly, so there is no intended behaviour change in this repo. The required-parameter change compiling clean across `deno task typecheck` is the evidence for the two loader entry points. `scripts/lint/audit-render-mode-defaults.ts` keeps it that way: it fails the build if any render-mode default under `src/` resolves toward development. It found the data fetcher case, which the issue did not list. Refs veryfront/veryfront-issue-inbox#555
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📝 WalkthroughWalkthroughThe PR adds a lint audit for development-oriented render defaults and changes omitted render, loader, server, manifest, data, and transform options to production-safe behavior. ChangesRender-mode default enforcement
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to The PR makes production behavior safer by default, but its new CI guard does not detect aliased render-mode defaults, so future changes could silently restore development semantics in production. Merge should wait for that enforcement gap to be fixed or explicitly accepted; the remaining test and scanner issues are smaller follow-ups. Possibly related PRs
Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Codex review: guard against an untyped caller reaching the loaders with no options at all. The parameter stays required, so a TypeScript caller still cannot omit the render mode, and `deno task typecheck` still rejects the omission. The `?? false` only decides what happens if something outside the type system gets there, and it lands on production.
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Inline comments:
In `@scripts/lint/audit-render-mode-defaults.test.ts`:
- Around line 1-2: Update the test imports to use the repository’s Veryfront
helpers: import describe and it from `#veryfront/testing/bdd.ts` and assertEquals
from `#veryfront/testing/assert.ts`, replacing the `#std` imports while leaving the
test behavior unchanged.
In `@scripts/lint/audit-render-mode-defaults.ts`:
- Around line 43-45: Extend the render-mode default audit pattern used by the
dev-default rule to detect destructuring defaults with an optional alias,
including forms such as dev: renderDev = true, while preserving existing
direct-assignment matches. Add a focused failing test in the
audit-render-mode-defaults test suite covering the aliased destructuring case.
- Around line 63-65: Update stripComments to remove block-comment content while
preserving all newline characters, so subsequent violation line numbers remain
accurate; retain the existing line-comment behavior. Add a test covering a
violation occurring after a multi-line block comment and verify the reported
line number.
- Around line 110-124: Update the directory traversal function containing walk
so the try/catch wraps the entire for-await iteration over Deno.readDir(dir),
not just iterator creation. Suppress only Deno.errors.NotFound for missing
optional roots, and rethrow permission or other I/O errors while preserving the
existing recursive traversal and file filtering.
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📒 Files selected for processing (19)
deno.jsonscripts/lint/audit-render-mode-defaults.test.tsscripts/lint/audit-render-mode-defaults.tssrc/data/data-fetcher.test.tssrc/data/data-fetcher.tssrc/modules/react-loader/component-loader.tssrc/modules/react-loader/types.tssrc/modules/react-loader/unified-loader.test.tssrc/modules/react-loader/unified-loader.tssrc/modules/server/module-server.test.tssrc/modules/server/module-server.tssrc/modules/server/module-source-bounds.test.tssrc/rendering/rsc/server-renderer/rsc-renderer.test.tssrc/rendering/rsc/server-renderer/rsc-renderer.tssrc/rendering/ssr/component-registry.tssrc/server/services/rsc/orchestrators/manifest-handler.test.tssrc/server/services/rsc/orchestrators/manifest-handler.tssrc/transforms/pipeline/context.test.tssrc/transforms/pipeline/context.ts
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@codex review exact head c762240. The runtime half of the prior finding is fixed with options?.dev ?? false. The compile-time requirement remains because these loader functions are internal, not exported in deno.json or through any public barrel, and all non-test callers pass dev explicitly. Please review this exact head for omitted callers, false assumptions in the new render-default audit, and production/development behavior regressions. |
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`lint:test-typecheck` typechecks this file and caught it: the loader stubs
wrote `observed.push(options ?? {})`, which only compiled while `options`
was optional. It is required now, so the fallback is both dead and a type
error. Push the options straight through.
CodeRabbit review, four fixes:
- Detect aliased destructuring defaults (`const { dev: renderDev = true }`),
which slipped past the previous pattern.
- Blank block comments instead of deleting them, so a violation after a
multi-line comment reports the right line number.
- Put the `for await` inside the guard, since `Deno.readDir` is lazy, and
rethrow anything that is not `NotFound`. A check that cannot read the tree
must fail loudly rather than report no violations for files it never
opened.
- Use the repo BDD and assert helpers in the test, per AGENTS.md.
Codex review: a regex comment stripper cannot tell a real block comment from a `/*` inside a string literal, so one string delimiter blanked out large spans of real code and the rules never ran there. Measured on this tree it hid 243 code lines in `src/rendering/script-page-handling.ts` (65 to 345) and 33 in `src/transforms/mdx/esm-module-loader/utils/source-spans.ts` (610 to 646). A guard with a silent blind spot is the same fail-open shape this PR is closing. Replace it with a character scanner that tracks single, double and template quotes, consumes escaped characters so an escaped slash in a regex literal cannot open a comment, and blanks comments to spaces so line and column positions survive. Both files now report zero blanked code lines, and all six fail-open forms are detected when injected at line 201 of the file that used to hide them.
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Exact-head verification for dea8412: affected runtime and lint tests pass (205 steps), the parser audit passes (12 steps), the live render-mode audit passes, repository lint passes, full typecheck passes, formatting passes, and git diff --check passes. All five review threads were fixed, replied to, and resolved. @codex review the exact current head dea8412. |
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Codex review: `dev` became required on `LoadComponentOptions`, so the copyable example in the modules README no longer typechecks as written. Add an explicit `dev: false` with a note on what the flag selects, and state the requirement in the loader guide next to the other option guidance.
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Exact-head follow-up 2c9044a fixes the remaining loader-documentation review thread and adds a RED-GREEN contract test for the copyable example. Focused docs test, targeted check, repository lint, full typecheck, formatting, and diff checks pass. The thread is replied to and resolved. @codex review the exact current head 2c9044a. |
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Codex Review: Didn't find any major issues. 🎉 Reviewed commit: ℹ️ About Codex in GitHubYour team has set up Codex to review pull requests in this repo. Reviews are triggered when you
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Follow-up to #3841, #3844 and #3845. Three items from the #3845 review are live on main. Site C, hosted production MDX pages. `loader-helpers.ts` passed an explicit `dev: true` for every `/_vf_modules/*` import of a compiled-MDX entry, and both `rendering/page-rendering.ts` and the RSC `render-handler.ts` reach that path on a hosted production render. `ESMLoaderContext` had no mode field, so the render mode could not be threaded. It has one now, both call sites pass it, and a context that names no mode compiles for production. Measured on a probe module: development emits 1031 bytes with an inline sourcemap, retained dead code and unminified identifiers; production emits 220 bytes with none of those, and the two land on different cache keys. The render cache identity. `buildRenderCachePrefix` took the project, the "preview" | "production" environment and the release key, none of which imply the compile mode. `isLocalProject` decides the compile mode and never reached the prefix, so a local development server and a hosted preview server for the same project and branch both produced `<project>:preview:main:<version>`. A cached render carries its hydration bundle (`cachedClientModule` in `handleComponentPage`, fed from `cachedResult.pageModule`), so a development-compiled bundle could be served straight out of the render cache to a production-mode render, around the hydration-cache fix in #3845. The prefix now carries a required compile-mode segment, `parseRenderCacheKey` reads it back, and both prefix builders derive it from the same value they already use for `mode`. Both modes gain the segment, so entries written under the old prefix shape cannot be misread after deploy; they age out like any `VERSION` roll. The cache-namespace invariant. `buildMdxEsmCacheSchemaSample` names the compile-mode variant only to roll `MDX_ESM_CACHE_NAMESPACE`, and that roll is the only thing keeping a production render off a legacy, always development-compiled entry. Every test referenced the namespace symbolically, so deleting the line reopened the hole silently. The sample builder is now exported and a test rebuilds the pre-roll namespace from it, then asserts no current production key can reach that namespace. It asserts the isolation property, not the hash. Tests now pin the compile mode through the five #3845 source files that nothing detected a regression in. Reverting each one to its pre-#3845 state fails at least one test. Refs veryfront/veryfront-issue-inbox#555
Summary
Follow-up to veryfront/veryfront-issue-inbox#555, deliberately deferred from #3841.
#3841 fixed the four SSR call sites that hardcoded
dev: true. It did not fix thereason four sites were able to drift in the first place: every render-mode default in
the runtime failed open toward development. A call site that forgot to pass the
flag silently got development semantics in production. This PR closes that bug class
by making those defaults fail closed toward production, and by adding a CI check that
keeps it that way.
This is defense in depth. There is no intended behaviour change in this repo.
Every non-test caller of every default below already passes the flag explicitly. That
claim was re-derived here rather than inherited from the earlier audit, and for the
two loader entry points it is now enforced by the compiler instead of asserted in
prose:
deno task typecheckpasses, which is only possible if every caller suppliesdev.What changed, with caller evidence
modules/react-loader/component-loader.tsoptions?.dev ?? truedevis requiredmodules/react-loader/unified-loader.tsoptions?.dev ?? truedevis requiredtransforms/pipeline/context.tsoptions.dev ?? true?? falsemodules/server/module-server.tsdev = truedev = falserendering/rsc/server-renderer/rsc-renderer.tsmode ?? "development"?? "production"server/services/rsc/orchestrators/manifest-handler.tsisLocalProject ?? true?? falsedata/data-fetcher.tsmode = "development"mode = "production"1.
loadModuleFromSource/loadComponentFromSourceLoadComponentOptions.devis nowdev: booleanandoptionsis a requiredparameter, so the flag cannot be omitted at all. Required beats a safe default: the
omission becomes a CI type error rather than a silent runtime downgrade.
All ten non-test call sites already pass it, and the type change compiles clean across
the full
deno task typecheckentrypoint set. That is the evidence:server/build-app-route-renderer.ts(two sites),dev: falseserver/handlers/request/ssr/error-page-fallback.ts,dev: isLocalserver/services/rsc/orchestrators/render-handler.ts,dev: this.mode === "development"server/services/rsc/endpoints/action-handler.ts,dev: mode === "development"rendering/component-handling.ts,devderived fromoptions?.moderendering/app-reserved.ts,dev: mode === "development"rendering/ssr/component-registry.ts(getLoaderOptions),dev: this.renderMode === "development"rendering/layouts/layout-applicator.ts(three sites),dev: this.mode === "development"rendering/layouts/utils/component-loader.ts,devderived from the render modeThe
ComponentSourceLoaderseam incomponent-registry.tswas widened to match, sothe registry cannot be injected with a loader that skips the flag.
Note on the issue text: it expected
tests/integration/renderer/tenant-module-isolation.test.tsto omit
devat three sites. It does not. All three already passdev: true, and havesince well before #3841. No change was needed there.
2.
loadComponentsUnifiedConfirmed zero non-test callers anywhere: the only references are two barrel
re-exports (
modules/index.ts,modules/react-loader/index.ts) and its own test. Itshares
LoadComponentOptions, so it inherits the required flag.3. Transform pipeline context
createTransformContextSynchas no caller at all outside its test. Every non-testentry into the pipeline (
transformToESM/runPipeline) suppliesdev:module-transform-cache.ts,ssr-module-loader/loader.ts(viaSSRModuleLoaderOptions.dev, already a required boolean),module-server.ts(threetransformOptsliterals),component-handling.ts,project-run-execute.handler.ts(via the required
dev: booleanon thebuild-executortransform contract), andcomponent-loader.ts.Defaulted rather than required:
TransformOptionshas 68 references acrosssrc/andtwo extension packages, so requiring the field there is a different and much wider
change than this one.
4. Module server
Single non-test caller
module-server-handler.tspassesdev: !!ctx.isLocalProject.Defaulted rather than required because roughly 50 test call sites omit it. Requiring
it would mean writing
dev: falseat each of them, which is the same semantics asflipping the default at fifty times the diff.
5. RSC renderer: the one with real latent severity
This is the dangerous one if it ever fires.
rsc-renderer.tsdoestree: this.mode === "development" ? tree : undefined, so an omitted mode put theentire rendered tree into the RSC payload sent to the browser, and additionally
selected the
"fs"client module strategy (filesystem paths in client refs).Inert today: the only non-test constructor,
server/services/rsc/orchestrators/handler.ts, passesmode: this.mode. The defaultis now
"production", so a future forgotten mode fails to "no tree" instead of "wholetree leaked".
Exactly one test depended on the leaky default: "preserves nested server and client
children in a hydratable boundary payload" built the renderer without a mode and then
asserted on
payload.tree. It now passesmode: "development"explicitly, becausethe development payload shape is what it means to assert. Every other mode-omitting
test in that file uses manifest entries without
rel, for which both client modulestrategies produce the same URL, so they are genuinely unaffected.
6. RSC manifest handler
Single non-test caller
orchestrators/handler.tspassesisLocalProject. Local modeexposes
meta.sourcePathinstead of the graph-relative path and emits filesystemclient module URLs, so the default now points at the remote shape. Every
ManifestHandlerconstruction in the test suite statesisLocalProjectexplicitlyinstead of inheriting a default.
7. Additional finding, not in the original list
The new CI check below found a seventh instance of the same bug class:
DataFetcher.fetchDatadefaultedmodeto"development". In developmentpreferServerDatais unconditionally true, so an omitted mode routes every pagethrough
getServerData(sandbox worker execution) even when the page exportsgetStaticData. The single non-test caller (rendering/orchestrator/pipeline.ts)passes
this.config.mode, so this is inert today as well.Structural enforcement
scripts/lint/audit-render-mode-defaults.tsfails the build if any render-modedefault under
src/resolves toward development (dev ?? true,dev = true,mode ?? "development",mode = "development", and theisLocalProjectequivalents). Wired into
lint:ci,verifyandverify:quick, with unit tests intest:scripts.Chosen over a per-default unit test because a lint check is the repo's existing
mechanism for this shape of invariant (
lint:ban-test-only,lint:anti-slop,lint:module-boundaries), and because it generalises: it catches the next seam thatgrows a fail-open default, not only these seven. It is what found item 7. It was
verified against deliberately reintroduced regressions, not just against a clean
tree: each of the six fail-open forms is injected into a real source file and must be
reported.
The comment stripper is a character scanner rather than a regex, because a regex
cannot tell a real
/*from one inside a string literal. That is not cosmetic: thefirst regex version silently blanked 243 code lines of
src/rendering/script-page-handling.tsand 33 ofsrc/transforms/mdx/esm-module-loader/utils/source-spans.ts, so a fail-open defaultin those spans would have passed. A guard with a silent blind spot is the same
failure shape this PR is closing, one level up. Both files now report zero blanked
code lines.
For items 1 and 2 the enforcement is stronger and needs no lint: the field is
required, so
deno task typecheckrejects a call site that omits it.Tests
transforms/pipeline/context.test.ts: the existing "should default dev to true" now pinsfalse, plus a case for explicittrueandfalse.rendering/rsc/server-renderer/rsc-renderer.test.ts: new case pinning the production default and thersc-modulestrategy; the tree-asserting case now declaresmode: "development".server/services/rsc/orchestrators/manifest-handler.test.ts: new cases pinning the remote default and the rejection of arel-less component; all constructions stateisLocalProject.modules/server/module-server.test.ts: the redaction test now also asserts that an omitteddevlands on the redacted production branch. The localservehelper statesdev: true, which is what those cases always ran under and what their unminified-identifier and sourcemap assertions require.modules/server/module-source-bounds.test.ts: helper statesdev: true; the refusal case asserts the specific limit message, which production deliberately redacts.data/data-fetcher.test.ts: "should default to development mode" becomes "defaults an omitted mode to production".modules/react-loader/unified-loader.test.ts: new case asserting the render mode is threaded through.scripts/lint/audit-render-mode-defaults.test.ts: rule-level coverage including comment handling and the production-safe forms.Refs veryfront/veryfront-issue-inbox#555