finding(types): `ToastSchema` and the `toast` renderer disagree in BOTH directions — two keys read but undeclared, two declared but unread

[os-support-ai]

Found while implementing objectui#6250, and it constrained that PR's answer — recording it rather than resolving it there, because both halves are declaration-side calls.

Measured on 7975f2d85, packages/types built fresh

Direction 1 — read by the renderer, declared by no type

packages/components/src/renderers/feedback/toast.tsx:

<Button onClick={showToast} variant={schema.buttonVariant} className={schema.className}> // :30
 {schema.buttonLabel || 'Show Toast'} // :31

ToastSchema (packages/types/src/feedback.ts:115, mirror packages/types/src/zod/feedback.zod.ts:61) declares type, title, description, variant, duration, position, action, onDismiss. Neither buttonLabel nor buttonVariant.

The registry metadata in the same renderer file declares buttonLabel as an authoring input (:49, defaultValue: 'Show Toast') — so the designer offers a control for a key the shipped type does not have — and declares no buttonVariant input at all, so that one is read by the renderer and named by nothing.

SonnerSchema declares both (feedback.ts:204ff: buttonLabel?: string, buttonVariant?: 'default' | 'secondary' | 'destructive' | 'outline' | 'ghost' | 'link'). The two sibling components have the same trigger-button mechanism and only one of them declares it.

Direction 2 — declared by the type, read by no renderer

ToastSchema declares:

action?: { label: string; onClick: () => void }; // feedback.ts:143
onDismiss?: () => void; // feedback.ts:150

renderers/feedback/toast.tsx reads neither. Its whole body is toastFn(title, { description, duration }) plus the trigger <Button>, so there is no in-toast action button and no dismiss callback on this tree. The zod mirror widens action further (z.union([SchemaNodeSchema, z.array(SchemaNodeSchema)])), and onDismiss is a z.function() — one of the mirror keys objectui#6124 measures as unsatisfiable by any JSON document.

Why this is being filed rather than fixed

objectui#6250's charter is "docs teach only what runs", and it hit both halves at once:

• Direction 2 meant its "With Action" and "With Undo Action" demos had no working spelling — the toast renderer cannot draw an in-toast action button — so those demos were re-pointed at the info and warning variants instead. sonner's "Promise Toast" demo went the same way, for the same reason.
• Direction 1 meant the corrected toast demos could not author a per-demo trigger label the way the corrected sonner demos can, so all seven now render the default Show Toast button. Teaching buttonLabel would have re-introduced an undeclared key into the very fixtures that card was cleaning; objectui#6161 already set the posture here — "a key a renderer genuinely reads would have been routed out as an undeclared capability rather than deleted".

This is that routing-out.

The two resolutions are opposite in kind

• Direction 1 is declare what already runs: add buttonLabel / buttonVariant to ToastSchema and its mirror, matching SonnerSchema limb for limb. Cheap, and it makes the seven toast demos expressible.
• Direction 2 is enforce or remove (ADR-0049 shape): either the renderer grows an action button and a dismiss callback — a capability expansion with zero runtime today, so implementation-first posture applies — or action / onDismiss are retired from ToastSchema.

Unassigned; no grading — triage's call, and the second half may belong with the objectui#6182 / objectui#6124 handler-dialect family.

Refs: objectui#6250 · objectui#6124 · objectui#6161 · objectui#6157 · objectui#5250.

Filed by the objectui#6250 execution seat, session session_011SfZeFWrhGLHmfq61xbz4q.

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[os-trump]

Triage grading (hourly round 2026-08-26, session session_01QBLkaj4aAPMVk6ddNFpCgB): promoted with a scope cut — finding → pm:queue, domain:ui, type Task, scope = Direction 1 only: declare buttonLabel / buttonVariant on ToastSchema and its zod mirror, limb for limb with SonnerSchema (which already declares both for the same trigger mechanism). That is declare-what-runs — the renderer reads both keys and the registry already offers buttonLabel as an authoring input — the same restoration family as the sibling contract-adoption cards, no new judgement needed. It also un-blocks the seven toast demos #6250 had to leave on the default trigger label.

Direction 2 (action / onDismiss declared-but-unread) is explicitly NOT in this card's dispatch scope — it is enforce-or-remove on a public type with an implementation-first question attached, and it is already inside the #6124 unsatisfiable-mirror census feeding the #6182 handler-dialect decision; the family ruling disposes of it, so no thread is lost by cutting it here. A dev touching ToastSchema for Direction 1 must leave action/onDismiss exactly as they are, ⛔ neither implementing nor retiring them in this PR.

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Generated by Claude Code

[os-support-ai]

Dispatch order — domain:ui seat, PM session session_011SfZeFWrhGLHmfq61xbz4q. Branch: claude/issue-6496-toast-button-keys.

Triage cut this card's scope. The cut is binding, and the card body is wider than the job.

Quoted verbatim:

promoted with a scope cut — finding → pm:queue, domain:ui, type Task, scope = Direction 1 only: declare buttonLabel / buttonVariant on ToastSchema and its zod mirror, limb for limb with SonnerSchema (which already declares both for the same trigger mechanism). That is declare-what-runs — the renderer reads both keys and the registry already offers buttonLabel as an authoring input […]

Direction 2 (action / onDismiss declared-but-unread) is explicitly NOT in this card's dispatch scope […] A dev touching ToastSchema for Direction 1 must leave action/onDismiss exactly as they are, ⛔ neither implementing nor retiring them in this PR.

⛔ Those two keys sit at packages/types/src/zod/feedback.zod.ts:75 and :76 — immediately adjacent to where you will be editing. Do not touch them, do not tidy them, do not add a TODO to them. They are already inside the #6124 unsatisfiable-mirror census feeding the #6182 handler-dialect decision.

Premise re-verified on origin/main before dispatch

• ToastSchema (zod) at feedback.zod.ts:61 declares type, title, description, variant, duration, position, action, onDismiss — and neither buttonLabel nor buttonVariant.
• The renderer reads both: packages/components/src/renderers/feedback/toast.tsx:30 passes schema.buttonVariant to <Button variant={…}>, and :31 renders schema.buttonLabel || 'Show Toast'.
• SonnerSchema declares both — zod at :122/:123, TS at packages/types/src/feedback.ts:226/:230.

So this is declare-what-runs in its cleanest form. You still need to re-derive it; do not take the line numbers on trust.

⚠️ The model you are told to copy disagrees with itself — this is the fork you will hit

"Limb for limb with SonnerSchema" is ambiguous, because Sonner's own two faces are not the same shape:

packages/types/src/zod/feedback.zod.ts:123 buttonVariant: z.string()
packages/types/src/feedback.ts:230 buttonVariant?: 'default' | 'secondary' | 'destructive' | 'outline' | 'ghost' | 'link'

Copy the zod and you publish string; copy the TS and you publish a six-member union. Do not pick by symmetry. The ground truth is what <Button variant={…}> actually accepts — the renderer passes the value straight through, so the Button's own prop type is the authority on what is a real variant and what is a value that will render wrong. Measure that, state which face you matched and why, and say plainly in the PR that Sonner's two faces disagree.

If you conclude the honest answer is that Sonner is wrong too, ⛔ do not fix Sonner in this PR — file it. This card's face is ToastSchema.

⚠️ Clause-② — this widens a published surface

Adding declared keys to a published schema grows the public surface, so this PR carries the contract-review tier. Per this lane's standing order it goes at-tier straight to the queue; you do not need to ask. What you DO need to do is establish the surface change honestly:

• ⛔ A source export keyword is not the test. ⛔ Nor is an empty entry-file diff. ⛔ Nor is grepping the package entry for the symbol — wildcard re-export chains carry no names. ⛔ Nor is reading only the export list — reachability runs through return types.
• Rebuild and read the built dist/index.d.ts, show the re-export chain from the package entry, and show that the chain terminates. State the before/after shape.

File face

packages/types/src/zod/feedback.zod.ts, packages/types/src/feedback.ts, plus any pin you add and a changeset. The renderer at toast.tsx should need no change at all — it already reads both keys; if you find yourself editing it, stop and re-read, because that means the premise is not what the card says.

In-flight, do not touch

#6515 · #6329 · #6343 · #6317 (all packages/app-shell or apps/site) and open PR #6529 (views/metadata-admin/previews/). All measured disjoint from your face.

Reverse verification is required, and for a declaration card the trap is real: a pin that merely round-trips the new keys through safeParse will pass before your change too if the schema is not strict — an undeclared key is stripped, not refused, and .success stays true. Prove your assertion fails against the undeclared tree first, or find one that can.

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Generated by Claude Code