feat(schema): add card_image_sizes to image_carousel by bokelley · Pull Request #8937 · adcontextprotocol/adcp

bokelley · 2026-11-12T11:42:48Z

Needed before the 3.3 RC, planned for Mon Nov 16, 2026.

What changes

image_carousel gains an optional card_image_sizes parameter: a list of accepted logical { width, height } pairs for card images. It reuses the shape of native_in_feed's main_image_sizes (the issue's second option), so a format can accept several sizes, for example 1:1 and 4:5 cards, and SDKs can share the size-matching code.

"params": {
  "card_aspect_ratio": "1:1",
  "card_image_sizes": [{ "width": 1080, "height": 1080 }]
}

The issue's three open semantics questions are answered in the schema description and in a new "Card image size" section of the carousel docs:

Exact or larger? Exact. A card image must match a listed pair; a larger image at the same ratio does not match. When the cards slot declares pixel_ratios, the intrinsic size is the matched pair times the selected ratio, as for every other image slot.
Interaction with card_aspect_ratio. When both are declared, every listed pair must have that ratio within 1% (so 1200×627 matches 1.91:1). A declaration where they disagree is invalid, and neither field wins. When only card_image_sizes is declared, the sizes imply the accepted ratios. Mixed orientations stay disallowed, so all card images in one creative match pairs of one ratio.
Video cards? Not constrained. Video card media keeps following card_video_max_file_size_kb and card_video_max_duration_ms.

The ratio agreement is not checked in JSON Schema, since it cannot compare a ratio string with integer pairs. It is recorded as an x-adcp-validation.verifier_constraints entry, the pattern image, native_in_feed and other canonicals use for cross-field rules.

Files

static/schemas/source/formats/canonical/image_carousel.json: the new property (x-added-in: "3.3.0"), the card_aspect_ratio cross-reference, and the verifier constraints.
docs/creative/channels/carousels.mdx: the example declares both fields, plus the new "Card image size" section.
docs/reference/whats-new-in-3-3.mdx: a short entry.
static/examples/products/canonical/meta_carousel.json: adds card_image_sizes: [1080×1080], which agrees with its card_aspect_ratio: "1:1".
tests/x-added-in-3-3-sweep.test.cjs: registers the new 3.3 property.
server/src/training-agent/task-handlers.ts and server/tests/unit/training-agent-list-products-canonical.test.ts: see below.
tests/mcp-schema-projection.test.cjs: the new field reaches comply-test-controller-request.json through the seeded Product's format_options. I shortened the description to 1_384_855 bytes and raised the parity compile bound from 1_384_000 to 1_385_000, recording the measurement as earlier bumps do.
.changeset/image-carousel-card-image-sizes.md: minor.

Training agent and certification suite

The training agent's product-factory.ts already declared card_image_sizes on its two carousel options (1080×1080 and 1200×1200) as an undeclared extension param. That is the staging example in the issue, and it needs no change to use the standard field.

Now that 3.3 declares the field with x-added-in, served-release-shape.test.ts caught the agent sending it to 3.2 and 3.1 callers. The agent now withholds params added after the served release from get_products format_options and from package formats_to_provide / formats_pending (DR-0024), using the existing omitFieldsAddedAfterRelease helper. list_products already withheld it through its canonical-product projection, so training-agent-list-products-canonical.test.ts, which compares a 3.2 product with the 3.3 one minus installments, now also drops card_image_sizes. That is the only code change.

The compliance storyboards that use image_carousel (sales-social, asset_type_filtering, canonical-format-validate-input) declare no card size, so they are unaffected. The certification creative builder the issue mentions lives outside this repo. Once this lands it can read card_image_sizes instead of assuming 1080 px on the short side. That is a follow-up there, not here.

Note on the premise

image_carousel is not new in 3.3: it shipped as a stable canonical in 3.1.0. The change is still additive (one optional property on an open params object), so it is a minor and the additive-minor lint passes against 3.2.10. If it missed the RC it could ship in 3.4; it would not have to wait for 4.x.

Verification

npm run build:schemas
npm run test:schemas: pass
npm run lint:additive-minor: pass (source vs 3.2.10, 0 new non-additive changes)
node tests/json-schema-validation.test.cjs --file and node tests/snippet-validation.test.cjs --file on both changed doc pages: pass (no $schema-tagged or testable blocks)
npm run test:canonical-fixtures, test:canonical-negative, test:canonical-conventions; canonical-manifest-constructibility; x-added-in-3-3-sweep: pass
served-release-shape.test.ts, tenant-smoke.test.ts, training-agent.test.ts, training-agent-list-products-canonical.test.ts; npm run typecheck: pass
check-changeset-protocol-scope.cjs and changeset status: pass (minor)
Pre-commit server unit suite: every file passed except five that need node_modules physically inside the checkout (addie/fixed-trace-*-cli, fixed-trace-dormant-dispatch, external-smoke). They fail the same way in this worktree without the change, because it shares the main checkout's node_modules, so the final commit used --no-verify. CI runs them on a clean install.

Pushed with ADCP_SKIP_STORYBOARD_MATRIX=1, which skips the local pre-push storyboard matrix. The training-agent-storyboards.yml workflow remains the authoritative gate.

🤖 Generated with Claude Code

image_carousel could constrain card shape, count, file size and copy length but not pixel size, so a seller needing exact card sizes had no standard place to say so. Add an optional card_image_sizes list of logical {width, height} pairs, the same shape as native_in_feed's main_image_sizes. Card images match a listed pair exactly (times the selected pixel ratio when the cards slot declares pixel_ratios). Video card media is not constrained. When card_aspect_ratio is also declared, every listed pair must have that ratio within 1%; a disagreeing declaration is invalid. The ratio check is a verifier constraint, since JSON Schema cannot compare a ratio string with integer pairs. The training agent already declared card_image_sizes on its carousel options as an undeclared extension param. Now that 3.3 declares it, the agent withholds it from format declarations served to 3.2 and earlier callers (get_products format_options, package formats_to_provide and formats_pending), as DR-0024 requires. Closes #8911 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

aao-secretariat

Ladon verdict: Escalate to human review

Escalate — gated path requires human/CODEOWNERS approval.

This PR modifies static/schemas/source/formats/canonical/image_carousel.json, which matches the hard approval gate glob static/schemas/source/** (gated_paths: true). The current review_decision is REVIEW_REQUIRED, not APPROVED, so the gate is not satisfied (decision table row 2).

The reviewer found the change clean and additive: card_image_sizes is new, optional, carries x-added-in: 3.3.0 with a correct minor changeset, mirrors native_in_feed.main_image_sizes, and records the cross-field ratio rule via x-adcp-validation.verifier_constraints. Schema↔docs coherence verified (anchor, referenced fields, examples agree with card_aspect_ratio: "1:1"). Served-release handling correctly strips the 3.3 param for pinned 3.1/3.2 callers (DR-0024), and the x-added-in sweep test is registered. No blocking or Medium findings.

Despite the clean diff, this is an additive (not breaking) change to a gated schema source file, and a real human/CODEOWNERS review is required before merge. The high-risk flag is driven only by (modified) entries with no medium-or-higher findings, so it does not independently escalate — but the unsatisfied gated path does.

Escalation reasons

static/schemas/source/formats/canonical/image_carousel.json is under the static/schemas/source/** approval gate and review_decision is REVIEW_REQUIRED (not APPROVED). Human/CODEOWNERS review required before merge.

Why human review

static/schemas/source/formats/canonical/image_carousel.json touches a gated path (static/schemas/source/**) and review_decision is REVIEW_REQUIRED, not APPROVED — requires human/CODEOWNERS approval before merge.
This PR touches a path under a hard, non-overridable approval gate (static/schemas/source/formats/canonical/image_carousel.json (modified) matches static/schemas/source/**) and the current GitHub review decision is 'REVIEW_REQUIRED', not APPROVED. This is a hard gate enforced in code — Ladon cannot auto-approve until a human/CODEOWNERS approval is recorded, regardless of how clean the diff is.

card_image_sizes reaches comply-test-controller-request.json through the seeded Product's format_options. Shorten the new description and verifier constraints (1_385_400 to 1_384_855 bytes) and raise the parity compile bound to 1_385_000, recording the measurement as the earlier bumps do. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

aao-secretariat

Ladon verdict: Escalate to human review

Escalate — gated path requires human/CODEOWNERS approval.

This PR modifies static/schemas/source/formats/canonical/image_carousel.json, which matches the hard approval gate glob static/schemas/source/**. gated_paths is true and review_decision is REVIEW_REQUIRED (not APPROVED), so decision table row 2 fires: Ladon cannot auto-approve until a human/CODEOWNERS approval is recorded, regardless of how clean the diff is.

The reviewer found no Critical/High/Medium findings. The schema prose-tightening of card_image_sizes verifier_constraints stays coherent with carousels.mdx, the changeset, and whats-new-in-3-3.mdx (exact-match, images-only, 1% ratio agreement). The PARITY_COMPILE_LIMIT bump (1_384_000 → 1_385_000) is a documented ratchet with byte accounting and headroom. The dropped conditional in the constraint summary is retained in the authoritative field description — Low, not surfaced.

Escalation reasons

Modifies static/schemas/source/formats/canonical/image_carousel.json — a gated path under static/schemas/source/**, and review_decision is REVIEW_REQUIRED, not APPROVED. Human/CODEOWNERS approval required before merge.

Why human review

Modifies static/schemas/source/formats/canonical/image_carousel.json — a gated path under static/schemas/source/** — and review_decision is REVIEW_REQUIRED, not APPROVED. Human/CODEOWNERS approval required before merge.
This PR touches a path under a hard, non-overridable approval gate (static/schemas/source/formats/canonical/image_carousel.json (modified) matches static/schemas/source/**) and the current GitHub review decision is 'REVIEW_REQUIRED', not APPROVED. This is a hard gate enforced in code — Ladon cannot auto-approve until a human/CODEOWNERS approval is recorded, regardless of how clean the diff is.

…lease docs After rebasing onto main with #8866 merged: - Take #8866's wording for the boolean form of demographics in the migration guide's Deprecations section, and align the release notes and What's new with it (#8778 tracks the 4.0 removal). - 3.2.10 shipped without the schema opening, so say "the next 3.2.x patch (#8864)" and "3.2.10 and earlier", including in #8866's Schemas-are-open-by-default bullet. - Drop the dependency markers #8866 satisfied, and retarget the rest. - Cover the other changes merged for rc.0: origin-only authorized_agents URLs (#8939), declared-option creative conformance (#8941), TMP cache isolation (#7446), creative.supports_registry_policy_enforcement (#8857), 3gp/mpeg/m4v containers (#8668), carousel card_image_sizes (#8937), and the loosened URL patterns (#8792). - Refresh the in-review table against the 3.3.0 milestone on 2026-11-12, and remove the stray duplicate table header it carried. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

KonstantinMirin · 2026-11-12T20:23:29Z

One thing for the RC: card_image_sizes items set additionalProperties: false. #8866 merged after this PR, and on main (c951012f5e) this node is now the one closed location that isn't on #8866's kept-closed list: 113 closed locations against the 112 in #8866. #8866's inventory ran before this landed, so it never saw the node.

The description says these pairs match native_in_feed main_image_sizes, and those items are open. So are the sizes items on image, html5, display_tag and the three asset types. Under DR-0036 as ratified, a schema is closed only for a structural reason that the PR names, and a {width, height} pair has none: it isn't a oneOf branch, and nothing joins or dispatches on its keys. If 3.3 publishes it closed, no minor can add a member to a card size until a later correction opens it.

Could it be additionalProperties: true before the cut? #8949 already edits image_carousel.json, so it could carry the one line.

The additive-minor lint compares nodes that exist in both releases, so a node that is new and closed passes it, as it did here. A check that compares the closed set with the kept-closed list would catch the next one.

…lease docs After rebasing onto main with #8866 merged: - Take #8866's wording for the boolean form of demographics in the migration guide's Deprecations section, and align the release notes and What's new with it (#8778 tracks the 4.0 removal). - 3.2.10 shipped without the schema opening, so say "the next 3.2.x patch (#8864)" and "3.2.10 and earlier", including in #8866's Schemas-are-open-by-default bullet. - Drop the dependency markers #8866 satisfied, and retarget the rest. - Cover the other changes merged for rc.0: origin-only authorized_agents URLs (#8939), declared-option creative conformance (#8941), TMP cache isolation (#7446), creative.supports_registry_policy_enforcement (#8857), 3gp/mpeg/m4v containers (#8668), carousel card_image_sizes (#8937), and the loosened URL patterns (#8792). - Refresh the in-review table against the 3.3.0 milestone on 2026-11-12, and remove the stray duplicate table header it carried. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

aao-secretariat Bot added the ladon/needs-human-review Ladon has escalated this PR for human review. label Nov 12, 2026

aao-secretariat Bot reviewed Nov 12, 2026

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bokelley merged commit 3cf5f53 into main Nov 12, 2026
65 checks passed

bokelley deleted the feat/image-carousel-card-image-sizes branch November 12, 2026 13:55

bokelley mentioned this pull request Nov 12, 2026

fix(schemas): open schemas that were closed by accident (3.2.x backport) #8864

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This was referenced Nov 12, 2026

docs(creative): clarify cta errors, carousel defaults, asset_types and product formats #8949

Open

ci: bound history fetches for path checks and server test shards #8955

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bokelley mentioned this pull request Nov 12, 2026

docs(reference): bring the 3.3 release docs to 3.3.0-rc.0 #8883

Draft

KonstantinMirin mentioned this pull request Nov 12, 2026

image_carousel: declare cta_values for the per-card cta #8960

Open

bokelley mentioned this pull request Nov 13, 2026

feat(schema): add reserved-word-safe replacements for 6 enum positions and deprecate the originals (#8791) #8915

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KonstantinMirin mentioned this pull request Nov 13, 2026

feat(schemas): declare cta_values on image_carousel for the per-card cta #8976

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This was referenced Nov 13, 2026

feat(schema): audience targeting without inline member push #8996

Open

feat(schema): image_carousel declares cta_values for each card's cta #9001

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feat(schema): add card_image_sizes to image_carousel - #8937

feat(schema): add card_image_sizes to image_carousel#8937
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What changes

Files

Training agent and certification suite

Note on the premise

Verification

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Ladon verdict: Escalate to human review

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bokelley commented Nov 12, 2026 •

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