fix: deduplicate shared block/inline object names in schema compilation

[christianhg]

Problem

When a type name appears in both blockObjects and inlineObjects of a SchemaDefinition, compileSchemaDefinitionToPortableTextMemberSchemaTypes() passes duplicate type names to SanitySchema.compile(), causing:

Error: Duplicate type name added to schema: <name>

This happens in Studio when a Sanity schema has an object type used as both a block-level object and an inline object (e.g., simpleBlock.tsx in the test studio has myStringType named 'test' used in both positions).

The round-trip path is:

1. Studio calls sanitySchemaToPortableTextSchema(schemaType) → returns Schema with separate blockObjects and inlineObjects arrays
2. EditorProvider receives this as schemaDefinition and calls compileSchemaDefinitionToPortableTextMemberSchemaTypes()
3. That function creates defineType({name: 'test'}) for both the block object AND the inline object
4. Both get passed to SanitySchema.compile({types: [...blockObjects, ...inlineObjects]}) → duplicate name error

Fix

Generalized the existing temporary-name pattern (previously only handling image and url built-in names) to dynamically detect ANY name that appears in both blockObjects and inlineObjects. Shared names get unique temporary names (tmp-<key>-<name>) before SanitySchema.compile(), then are mapped back to their original names in the post-compilation fixup.

Test cases

• handles type appearing in both blockObjects and inlineObjects — verifies a type named 'test' in both positions compiles without error and produces correct output
• back and forth with shared blockObject and inlineObject names — verifies the full round-trip (Schema → PortableTextMemberSchemaTypes → Schema) preserves shared names correctly

Related

• fix(core): prepare for PTE v6 sanity-io/sanity#12181 — Studio PR that switches to schemaDefinition prop (blocked by this bug)
• feat!: remove @sanity/* dependencies #2136 — removes @sanity/* deps from editor

[changeset-bot]

🦋 Changeset detected

Latest commit: 2e3774e

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

This PR includes changesets to release 13 packages

Name	Type
@portabletext/sanity-bridge	Patch
@portabletext/block-tools	Patch
@portabletext/editor	Patch
@portabletext/plugin-character-pair-decorator	Patch
@portabletext/plugin-emoji-picker	Patch
@portabletext/plugin-input-rule	Patch
@portabletext/plugin-markdown-shortcuts	Patch
@portabletext/plugin-one-line	Patch
@portabletext/plugin-paste-link	Patch
@portabletext/plugin-sdk-value	Patch
@portabletext/plugin-typeahead-picker	Patch
@portabletext/plugin-typography	Patch
@portabletext/toolbar	Patch

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Project	Deployment	Actions	Updated (UTC)
portable-text-editor-documentation	Ready	Preview, Comment	Feb 18, 2026 10:13am
portable-text-example-basic	Ready	Preview, Comment	Feb 18, 2026 10:13am
portable-text-playground	Ready	Preview, Comment	Feb 18, 2026 10:13am