A REST/MCP/agent rename (no live editor) wrote the new title to the
page.title column, then writePageTitle loaded the ydoc (fragment still
OLD) and set it to NEW only in memory. On disconnect onStoreDocument saw
titleText(NEW) === column(NEW), took the no-op fast-path, and never
persisted the in-memory fragment — so page.ydoc kept the OLD title and a
later body edit silently reverted the column back to OLD.
writePageTitle now persists the 'title' fragment to page.ydoc DIRECTLY
(PersistenceExtension.persistTitleFragmentYdoc) after the transact,
bypassing the no-op onStoreDocument. The write carries no treeUpdate, so
the tree WS/redis listeners do not re-broadcast (no double broadcast),
and it is idempotent/lock-free so it is safe whether or not a live editor
is connected. Adds a persist-then-reload-then-edit-body regression test
that fails on the old no-op behaviour and passes after the fix.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Title now lives in the page's Yjs 'title' fragment, but two paths corrupted it:
- Rename-revert: a REST/MCP title change wrote only the page.title column,
never the Yjs fragment, so the next editor open replayed the stale Yjs title
and reverted the rename. PageService.update now mirrors the new title into the
Yjs 'title' fragment via CollaborationGateway.writePageTitle, which goes
through openDirectConnection directly (Redis-independent: works with
COLLAB_DISABLE_REDIS and in single-process deployments, unlike the
Redis-routed handleYjsEvent path). The write is best-effort: a Yjs failure is
logged and never rolls back the committed column write. Agent provenance
(actor/aiChatId) is threaded into the store context.
- Untitled-on-open: an empty/just-initialized 'title' fragment clobbered a
non-empty page.title to '' on open. onStoreDocument now treats the title as
changed only when the extracted text is non-empty, covering both the
title-only and body+title save branches. Empty-retitling via collab is
intentionally impossible; the REST DTO is the place to enforce non-empty.
writeTitleFragment does a full clear+seed of the 'title' fragment (no
duplication/concatenation) and leaves the body fragment intact. Removed the dead
useTreeMutation.handleRename path. Adds unit tests for writeTitleFragment, the
gateway write, the anti-empty-clobber guard, and agent provenance.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
