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fix(plugin-designer): key MetadataObjectsPage's name lookups as own entries - #6543
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…ntries
Deleting an object named `constructor` from the Object Manager was a silent
no-op: the row vanished, the save reported success, and the object was still
there after the reload.
Both name lookups in the page were plain object literals filled by assignment,
and the consequential one is a READ. The delete scan asked `!nextByName[name]`,
which for `constructor` answered out of `Object.prototype` with the `Object`
function — truthy — so the deletion read as "still present" and
`client.reset('object', ...)` never fired. Not a refusal, a no-op.
The second lookup, one function over, fails on the WRITE instead:
`byName[item.name] = item` for an object named `__proto__` invokes the prototype
setter rather than creating a key, so that object never became an own property,
never reached the manager at all, and left its payload on the lookup's prototype
chain for later name lookups to answer out of. Same construction, same ruling,
same file — named explicitly in the PR body rather than fixed in silence.
Both are now `Map`s. Neither container is ever serialised (only its values are
spread into a PUT body), so unlike the fields map in the sibling
MetadataFieldsPage — which IS the request body and therefore needs
`Object.fromEntries` — a `Map` fits: a string key is just a key, with no
prototype to answer out of and no setter to trip.
Measured against `@objectstack/spec` 17.2.0: `ObjectSchema` pins object names to
/^[a-z_][a-z0-9_]*$/, and `constructor` + `__proto__` are exactly the
intersection with `Object.prototype`'s own names — both storable, neither
deletable. The new suite pins that measurement so a loosened pattern reds here.
Keying only. Nameless and duplicate entries behave exactly as before: this page
writes per-object, so the refusal semantics objectui#6489 added to the fields
map are a separate question and are deliberately not ported.
Fixes#6522✅ Console Performance Budget
The eager closure is every chunk the entry reaches through static imports — what the browser fetches and parses before the app renders. The entry chunk on its own is a small fraction of it. 📦 Bundle Size Report
Size Limits
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os-support-ai
commented
Aug 26, 2026
ACCEPT — objectui#6522 ( The second site was measured, and the measurement is sharper than my orderI flagged
So the two sites are not two instances of one bug; they are the read half and the write half, and the write half is the worse one — an object the server holds that the designer cannot list, edit, or delete, plus a payload left on the prototype chain for subsequent lookups to answer out of. "Fixed the other one too" and "measured the other one as a distinct failure mode" produce the same diff and are not the same work. ⭐⭐⭐ The blast radius is exactly two names, and that is now pinnedNew measurement worth more than the fix:
That converts a vague "prototype pollution is scary" into a bounded fact: two names, and the bound is a consequence of the name pattern. It is pinned in the suite so a loosened pattern reds — which is the part that makes it durable. If someone later relaxes that regex to allow camelCase, the pin fires and tells them they just widened this surface. That is a gate on a decision nobody would otherwise connect to this file. The container choice was justified, not defaulted
The fence held, and the fork was checked rather than assumed⛔ Triage fenced #6489's nameless/duplicate refusals out of this card. They did not port, and the dev did not merely refrain — it established why no fork needed escalating:
Reverse verification: the red is the silence, in that orderMy order required the failure be the silent no-op, not a shape assertion. Assertions were ordered silence → survival → mechanism deliberately, and the first red is: with Ablation used identical test bytes on both legs (blob ⭐⭐⭐ A finding about the repo's own gates, buried in the test notes
A gate that silently excludes untracked files prints green on a file it never opened, and the only way to know is to watch its own count move. That is a live blind instrument in shared infrastructure, and it will mislead anyone who runs those gates before staging. It is a report-only observation right now, so I am filing it separately — a conclusion that lives only in a PR body is not a state. Instrument hygiene
CI: 29 checks, zero failed, 8 running, on the head reported. Landing on green. On the claim-protocol question you raisedRecorded, and I agree with your recommendation A — but ⛔ it is not mine to rule. It belongs to the skills seat and is filed as objectstack#12520, where I have added today's evidence: four devs hit it, and on this very card it produced an actual half-state ( Generated by Claude Code |
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Fixes#6522
Deleting an object named
constructorfrom the Object Manager was a silent no-op: the row vanished, no error was shown, the save reported success, and the object was still there after the reload.Verification union ran at
38b4469ae(the final commit;git statusclean at that sha).The defect
handleObjectsChangebuilt its lookup of the manager's new list by blind assignment into a plain object literal, then asked!nextByName[name]. For an object namedconstructorthat read answers out ofObject.prototypewith theObjectfunction — truthy — so the deletion read as "still present" andclient.reset('object', …)never fired. The consequential half is the read, not the write.Measured against the installed
@objectstack/spec17.2.0,ObjectSchemapins object names to/^[a-z_][a-z0-9_]*$/:So
constructorand__proto__are exactly the intersection of the spec's accept set withObject.prototype's own names — both storable, neither deletable. That measurement is pinned in the new suite (the instrument), so a loosened pattern or a new lowercase prototype member reds here and names what the lookups newly have to survive, rather than passing quietly.The second site — measured, then fixed under the same ruling, and named here
The dispatch order asked me to measure
:146(byName[item.name] = iteminreload) rather than silently fix or silently skip it. It is the same defect class, failing on the write instead of the read:byName['__proto__'] = iteminvokes the prototype setter rather than creating a key. The entry never becomes an own property, soObject.values(...)never yields it: an object named__proto__never reaches the Object Manager at all — unlistable, uneditable, undeletable — while the server holds it happily.prev['label']returns the__proto__object's label string, and{...base}then spreads a string into the PUT body).prev[updated.name]at the merge base and in the redundant-save guard, is prototype-reachable for the same reason.Boundary scan for that in-place fix: same defect class, mechanical, shape already ruled by the family, same file and same gate family, no new verification surface, and no other claim holds this file (
MetadataFieldsPage.tsxis untouched — #6527 holds it).One reachability note stated honestly rather than pinned: the redundant-save guard could in principle skip a create whose inherited lookup compared equal, but
ObjectDefinition.labelis a requiredstring, so the all-undefinedcomparison that would trigger it is not reachable through the typed path. Fixed as part of the same construction, not claimed as an independently reachable bug.Why
Mapand notObject.fromEntriesThe family fix in the sibling
MetadataFieldsPage(landed by PR #6520) isObject.fromEntries+Object.prototype.hasOwnProperty.call(...), and that is right there: that map is the serialisedfieldsbody of the PUT, so it has to stay a plain object.Neither lookup here is ever serialised.
nextByNameis built, read and discarded inside one callback;byNameholds raw payloads whose values are spread into a PUT body while the container itself never reaches the wire. AMapremoves both hazards structurally — a string key is just a key, with no prototype to answer out of and no setter to trip — instead of requiring every future read in the file to remember a guard. Three read sites collapse to.get()/.has().ServerObjectsStateis a local, unexported interface; the exported surface (MetadataObjectsPage,MetadataObjectsPageProps) is unchanged.⛔ The fence: keying only, no refusals
objectui#6489 landed three things — own-property keying plus refusals for nameless and duplicate entries. Only the keying is ported. Nameless and duplicate entries behave exactly as before.
I did not conclude refusals are needed here, so there is no fork to escalate — for one measured reason:
MetadataClient.savealready refuses an empty name at the call boundary (name must be non-empty … the PUT route requires a name segment), so a nameless entry surfaces as an error in the page's error box rather than as a silent misroute. The one behaviour the keying fix changes incidentally is that a nameless entry now keys asundefinedinstead of the string"undefined", which strictly narrows the misroute (it can no longer collide with an object legally namedundefined). Duplicates remain last-write-wins.Reverse verification
The pin was written first and observed failing against the untouched tree, and the failure is the silent no-op, not a shape assertion. Assertions in each delete case are ordered outcome-first (silence → survival → mechanism) precisely so the first red is the user-visible fact:
expect(shownError()).toBeNull()passes on the same run — the page reported success while the object came straight back. Source tree was byte-identical toorigin/mainfor that run (git diff HEAD -- MetadataObjectsPage.tsx→ 0 lines).Repeated as a hashed ablation against the committed fix, identical test bytes on both legs (test blob
76b074a11):MetadataObjectsPage.tsxblob on diskorigin/main@c18acb09e)33e2fde1a(== BASE blob, verified)Tests 3 failed | 9 passed (12)5cf52af3d(== HEAD blob, verified)Tests 113 passed (113)(whole package)Both legs proved on disk by blob hash rather than by an editor's exit code; the restore leg additionally proved by
git diff HEAD= 0 lines and a clean index. No build participates in this ablation: the root vitest config aliases@object-ui/*tosrc/, and the file under test is imported by relative path within its own package, so there is nodist/staleness axis to rebuild past.The 9 green tests on the ablated leg are the controls doing their job — the ordinary-object delete, the plain-JS mechanics, the spec measurement, and the
constructoredit round-trip (constructoris an own key when the server sends it, so its edit path was never broken).Verification
All at
38b4469ae:pnpm exec vitest run packages/plugin-designer/→Test Files 15 passed (15),Tests 113 passed (113)(12 of them new)packages/plugin-designerpnpm run type-check(tsc --noEmit && tsc -p tsconfig.test.json) → exit 0. The new test file is genuinely inside that program, not merely excluded-and-silent: confirmed withtsc -p tsconfig.test.json --listFilespnpm --workspace-concurrency=2 --filter '@object-ui/plugin-designer^...' build) — before that,type-checkreportedTS2307: Cannot find module '@object-ui/types'across the whole package, i.e. a stale-worktree artefact rather than a real resultcheck:designer-field-key-parity→designer-field-key-parity: OK(this file is one of itswireshapes; theServerObjectSchemainterface it reads is unchanged)check:control-bytes→OK (scanned 5399 tracked text file(s))·check:vi-mock-specifiers→OK (3836 tracked source file(s), 456 carry a mock)— both re-run after staging, since both scan tracked files only; the counts moving (5397→5399, 3835→3836, 455→456) is the proof the new file was actually scannedcheck:phantom-deps→Every in-scope import is declared by the package that publishes itcheck-changeset-presence→2 source file(s) of 1 released package(s) changed, and this change declares 1 changeset(s)·check-changeset-no-major→ OK ·check-lint-coverage→46/46 packages lintedESLint — declared narrowing. Repo-wide
pnpm lintis CI's run; locally this is scoped topackages/plugin-designerand the narrowing is measured, not assumed: (1) the population came from ESLint's own config resolution rather than my own file list —pnpm exec eslint packages/plugin-designer --format json; (2) that JSON reports 51 files linted, 0 errors, 67 warnings, all pre-existing, with the changed files atMetadataObjectsPage.tsx0 errors / 1 warning andMetadataObjectsPage.lookupKeying.test.tsx0 / 0; (3)eslint.config.jsdeclares noparserOptions.projectand noprojectService, so type-aware linting is off and every verdict is a pure function of the file under lint plus the config — this diff touches no config file, so no untouched file's verdict can move. The single warning isreact-hooks/set-state-in-effectonvoid reload()insideuseEffect, which sits in an unchanged region of the diff (context lines only) and predates this branch.Generated by Claude Code