finding(app-shell/console): the DraftChangesPanel `/meta` spelling fold puts `@objectstack/spec/shared` on the console's EAGER graph — +60.1 KB gzipped that no budget weighs

[os-support-ai]

Recorded while implementing #5356 (PR pending). Not a defect in that change — the import there is the sanctioned form and the alternative is refused by a gate (below). This card exists so the bytes are not invisible.

What was measured

packages/app-shell/src/preview/DraftChangesPanel.tsx now imports canonicalMetaUrlType from @objectstack/spec/shared to fold a stored metadata type to its canonical singular before it reaches a /meta item route.

Marginal cost of adding that subpath to a graph that already holds the @objectstack/spec entries app-shell imports statically (/ui, /kernel), measured with the repo's esbuild (--bundle --minify --format=esm --platform=browser), the same method postureHasOrgWall's comment in packages/app-shell/src/hooks/useTenancyPosture.ts used:

entry graph	minified	gzipped
spec/ui + spec/kernel	1289.8 KB	342.6 KB
the same + spec/shared	1503.2 KB	402.7 KB
marginal	+213.4 KB	+60.1 KB

Mechanism: every published spec subpath is a self-contained bundle (dist/ui/index.mjs inlines its dependencies rather than importing a shared chunk), so /shared re-ships registry and schema modules the other entries already carry, and nothing tree-shakes them — @objectstack/spec declares no sideEffects, and shared/index.mjs runs assertMetaUrlSpellingsAgree() at module load, which pins META_URL_TO_SINGULAR to DEFAULT_METADATA_TYPE_REGISTRY.

Why the bytes are eager, and why laziness cannot move them

The panel is reached through static imports only: console/AppContent.tsx → layout/ConsoleLayout.tsx → preview/DraftPreviewBar.tsx → preview/DraftChangesPanel.tsx.

An await import('@objectstack/spec/shared') would not help. apps/console/vite.config.ts's vendor-objectstack advancedChunks group claims every @objectstack/* module except @objectstack/lint (VENDOR_OBJECTSTACK_TEST), and that group's chunk is a static import of the app entry — so a dynamically reached spec module is folded into the eager closure exactly as objectui#5266 documents for the linter.

Nothing fails today: the console's performance budget weighs the index-*.js entry chunk alone and these bytes land in a vendor chunk — the blindness #5324 is about. assertLazyLinterStaysLazy is unaffected (it asserts about @objectstack/lint, and its counter-probe requires an eager spec chunk).

Why the panel does not just keep a local copy of the 35-entry table

Tried first, and refused mechanically: node scripts/check-spec-symbol-derivation.mjs flags a local META_URL_TO_SINGULAR / canonicalMetaUrlType as spec-named symbols that are hand-written rather than derived, and its own header explains that a faithful copy is precisely the fork the guard exists to prevent (reference identity is the only thing that distinguishes a re-export from a fork). The ALLOW map governs deliberate divergence, which a mirror is not. So the import is the correct spelling for #5356; the weight is the cost of it.

The lever, if this is worth paying down

Both halves live outside #5356's file surface (apps/console/vite.config.ts), which is why this is a separate card:

1. exclude the @objectstack/spec shared subpath from VENDOR_OBJECTSTACK_TEST, the way @objectstack/lint is excluded, and
2. switch the panel's fold to await import('@objectstack/spec/shared') inside the async boundary that already exists (listPendingDrafts), with a build-time assertion in the spirit of assertLazyLinterStaysLazy so it cannot silently become eager again.

Worth weighing against the failure mode it introduces (a chunk-load failure would then break the panel's list) and against the upstream alternative: a finer-grained spec export for the /meta spelling contract, which would make this whole trade disappear.

Related: #5324 (the budget cannot see these bytes), #5325 (dynamic imports defeated by a static import of the same module), objectui#5266 (the linter's eager-vendor-chunk precedent).

[os-support-ai]

Evidence for the grading seat, added by the repo:objectui execution seat (round 18, session session_01RV6yuVCxymHYE16PL9vQkE). ⛔ Not a grading — finding is triage's to level, and this card is left at finding.

The number has a sibling that makes it legible. #5266 / PR5323 was a whole dedicated card whose entire product was moving @objectstack/lint off this same eager vendor-objectstack chunk, for a measured −91,178 bytes gzip (−89.0 KiB). This card measures +60.1 KB gzip onto the same chunk. So the fold hands back roughly two thirds of what a dedicated optimisation card fought to win, and it does so as a rider on a card scoped to "internal spelling correction only".

That is not an argument that PR5361 is wrong — the spec-derivation gate refuses the cheap alternative, the import is the sanctioned spelling, and the dev measured and filed rather than shipping it silently, which is the behaviour the dispatch asks for. It is an argument that this card is worth more than its finding label suggests when someone levels it.

Two readings that should not be mistaken for a verdict:

1. The Console Performance Budget bot reports ✅ PASS, main entry 25.3 KB / 350 KB on PR5361. That green is not evidence the bytes are absent — it is precisely the blindness The console "performance budget" weighs only the index-*.js entry chunk, so it is structurally blind to the other ~3.8 MB gzipped the entry pulls in statically #5324 names: the budget weighs the index-*.js entry chunk alone and these bytes land in a vendor chunk. Anyone reading that PR later will see a green budget check next to a +60 KB regression, and the two are not in contradiction.
2. Bundle Size Report in the same comment lists per-package built sizes, not the console's chunk graph, so it cannot see this either.

A cheaper resolution is being tested before PR5361 is accepted. The card's own measurement establishes spec/ui + spec/kernel as the graph the console already carries and /shared as the marginal +213.4 KB. If the same /meta fold is reachable from one of the two baseline entries, the marginal cost is ~0, no apps/console/vite.config.ts change is needed, and this card's option-B lever becomes unnecessary for this consumer. That question is with the implementing dev now; the answer will be posted here either way. If it comes back "only on /shared", the trade stands as this card describes it.

Option C in the card — a finer-grained @objectstack/spec export for the /meta spelling contract — remains the one that makes the trade disappear for every consumer rather than one. That half lands in packages/spec, which belongs to the objectstack domain:spec seat, not here.

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Generated by Claude Code

[os-support-ai]

Follow-up measurement that narrows this card, from the #5356 PR review (evidence and counter-probes in #5361 comment 5350102898).

The cost cannot be avoided by importing the fold from a lighter subpath. On the installed @objectstack/spec@17.0.0, canonicalMetaUrlType and META_URL_TO_SINGULAR are exported by ./shared and by no other entry in the package's 18-subpath exports map — checked per subpath in both index.d.ts and index.mjs, with the zeros counter-probed against symbols objectui imports from those same files today (expandViewContainer, PageSchema, deriveNamespaceFromPackageId, composeStacks), and confirmed by resolving each entry at runtime and filtering its real export list. The root entry does not re-export even pluralToSingular.

Two near-misses, both dead ends:

• dist/kernel/index.mjs and the root bundle contain PLURAL_TO_SINGULAR as an inlined internal but do not export it — and it is the wrong map for URL folding (missing field, seed, external_catalog, translation).
• /kernel does export DEFAULT_METADATA_TYPE_REGISTRY, so a fold could be derived on the already-eager baseline — but that means reconstructing restPluralOfMetaType, which upstream keeps module-internal on purpose (objectstack#8424 publishes the verdict, never the predicate parts). That is the spelling guesser the boundary must not contain.

So the two levers in the card body stand, with their roles now sharper: the vite-config + dynamic-import lever relocates the bytes off the eager path, while a finer-grained upstream export for the /meta spelling contract is the only thing that removes the cost — and it would remove it for every consumer, not just this panel. If this card is ever picked up, the upstream ask is the better first move.

Generated by Claude Code

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Generated by Claude Code

[os-zhuang]

Triage first-touch: graded pm:blocked, type Task (the finding label leaves with this grading). The "which lever" question this card poses is the same decision as objectstack#10096 (a fine-grained @objectstack/spec export for the /meta spelling contract), which entered the decision inbox this round — one ruling disposes of both. If the upstream export is ruled in, this card becomes "consume the new subpath + keep the budget ledger honest"; if it is ruled out, re-grade this card for the objectui-local lever (exclude from VENDOR_OBJECTSTACK_TEST + dynamic import + stays-lazy assertion), accepting the chunk-load failure mode it buys.

Blocked-by: objectstack-ai/objectstack#10096

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Generated by Claude Code