fix(schema): preserve named-field decoded value on StructWithRest key overlap

[Leka74]

Type

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Description

When a Schema.StructWithRest index signature's key domain overlapped a named property signature, the index signature's decoded value overwrote the property signature's transformed value. The declared type narrowed via intersection but the runtime did not.

const S = Schema.StructWithRest(
  Schema.Struct({ count: Schema.NumberFromString }),
  [Schema.Record(Schema.String, Schema.Unknown)]
)

Schema.decodeUnknownSync(S)({ count: "42" })
// before: { count: "42" }  (raw string)
// after:  { count: 42 }    (transformed number)

The index signature still runs for overlapping keys, its refinement checks (e.g. Schema.Finite) still apply and surface errors but its decoded value is no longer written when a property signature has already produced one.

disclaimer: fix applied with Opus 4.7

Related

• Closes StructWithRest: index signatures shadow named-field decoders at runtime #2245

[changeset-bot]

🦋 Changeset detected

Latest commit: fc1cdb9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 27 packages

Name	Type
effect	Patch
@effect/opentelemetry	Patch
@effect/platform-browser	Patch
@effect/platform-bun	Patch
@effect/platform-node-shared	Patch
@effect/platform-node	Patch
@effect/vitest	Patch
@effect/ai-anthropic	Patch
@effect/ai-openai-compat	Patch
@effect/ai-openai	Patch
@effect/ai-openrouter	Patch
@effect/atom-react	Patch
@effect/atom-solid	Patch
@effect/atom-vue	Patch
@effect/sql-clickhouse	Patch
@effect/sql-d1	Patch
@effect/sql-libsql	Patch
@effect/sql-mssql	Patch
@effect/sql-mysql2	Patch
@effect/sql-pg	Patch
@effect/sql-pglite	Patch
@effect/sql-sqlite-bun	Patch
@effect/sql-sqlite-do	Patch
@effect/sql-sqlite-node	Patch
@effect/sql-sqlite-react-native	Patch
@effect/sql-sqlite-wasm	Patch
@effect/openapi-generator	Patch

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[gcanti]

Closing in favor of #2312