Declare the four retype-and-wrap collections as lists (D6)

accordion's mainEntity, how-to's step and tool, and recipe's recipeIngredient and recipeInstructions are collections that still serialise as a bare object when they hold one item and an array when they hold two.

Every other collection in the catalog has been declared: pricing's offers, playlist's track / hasPart, breadcrumb's and timeline's itemListElement. These five are the remainder.

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Criteria completion

Tracking started Sep 16 — check back for trends.

Relationships

ID:SPEC-130Status:shipped

Declarative schema.org mapping

ID:WORK-570Status:done

Retype and wrap — accordion, recipe and how-to

Priority:mediumComplexity:moderateMilestone:v0.35.0

ID:WORK-565Status:done

The schema table and its applier

Priority:highComplexity:complexMilestone:v0.35.0

main current ready

claude/spec-131-snippet-targeting-q5ra9y ready claude/v0.35-parallel-feasibility-eia5le ready main ready

Why they were left out

WORK-570 migrated these four runes, and its whole evidence was an empty diff — byte-for-byte identical HTML and a JSON-LD baseline that did not move. Declaring a list changes a one-question accordion's mainEntity from an object to an array, which would have put a deliberate output change inside a refactor whose correctness argument is "nothing changed".

So it is a separate change, on purpose, and a small one.

Acceptance Criteria

accordionSchema declares lists: ['mainEntity']
howToSchema declares lists: ['step', 'tool']
recipeSchema declares lists: ['recipeIngredient', 'recipeInstructions']
The accordion.single, howto.single and recipe.single fixtures move from pending to declared in the baseline's D6 guard, and pending is then empty
The baseline diff shows exactly the shape change on those fixtures and nothing else

Approach

The guard in scripts/generate-seo-baseline.test.mjs already splits its pairs into declared and pending; this empties the second list. When it is empty, delete the split and assert the single rule — every collection is an array — since at that point there is no exception left to describe.

References

SPEC-130 — D6
WORK-570 — why these five were held back
WORK-565 — lists: and forceDeclaredLists