- A redirect followed for a custom base URL (quota on) no longer carries
the user's key or cookies to another origin, as fetch itself does, and
a private address may redirect to another private one (already counted).
- The admin Test of an Ollama or Vertex AI entry without a URL goes where
chat sends that entry's key: the environment's own URL variable, for
Ollama else the local default. The Test of an Ollama Cloud key without
a URL went to the cloud while chat went to local Ollama.
- Chat saves: each save notes the chat on screen and the order of the
reads before reading its data. A save read before switching chats no
longer writes into the chat switched to, and a copy that waited for its
thumbnail no longer replaces a newer one.
- "Continue without saving" keeps its button when a later auto-save fails,
and goes away when a new message is sent.
- A screenshot check that was waiting for its image when the user pressed
Stop stays skipped after the next message.
- MCP History: draw.io's own copy of a diagram (after get_diagram) no
longer adds an entry without a picture; a change of background is still
its own version. The tab ignores an edit's answer that arrives after a
newer AI write loaded.
- Desktop: a deleted preset is not brought back by a failed switch, and a
request naming no preset does not stop a rollback. An origin keeping
an access code counts as having settings.
- .env: a quoted value ending in a backslash ("C:\dir\") is read as dotenv
reads it.
- The tool card no longer crashes on an id that does not turn into text;
an older Test's success timer no longer ends a newer Test's spinner.
- Tests that passed without their fix now check it.
Chats:
- New Chat right after an answer saves that chat once. Saves run one at
a time and read the chat on screen when their turn comes; a save
scheduled for a chat that is no longer on screen is dropped. A chat
whose id was still on its way to the URL no longer comes back after
New Chat (the next answer went into it).
- Crossing the 768 px breakpoint keeps the chat panel: a streaming answer,
unsaved messages and attachments stay. The panel gets the sizes of each
side, and a panel collapsed on desktop opens on mobile.
- The chat's export waits for its own reply: an edit's history export
still on its way no longer answers it with the older diagram, and two
file saves at once no longer swap results.
- A second edit in one answer is previewed on the first edit's result.
- Stop also ends a running screenshot check; a chat that cannot be saved
(storage full) can be left with "Continue without saving".
- Small diagrams with shapes count as diagrams; the tool card no longer
crashes on malformed operations.
Quota and providers:
- Requests that reach the server's own endpoints count toward the quota:
EdgeOne (always its own endpoint now), a private base URL whatever key
header is sent, keyless Ollama without a URL. With the quota on, a
redirect is followed only to a public address. The output cap applies
to these requests too.
- Stop records the tokens of the steps that finished; the screenshot check
counts its tokens without counting a request.
- EdgeOne configured only by AI_PROVIDER works, also in the admin Test,
which forwards the access code. Azure set up only in the admin panel
works in chat. The Test sends a Bedrock session token.
- The admin panel's Test of an entry without a URL uses the server's URL
as the server does (no private address check for it); the admin panel
no longer writes an Ollama URL.
MCP server:
- Write tools and start_session run one at a time, so two at once never
drop each other's change; a cancelled call waiting its turn is skipped.
get_diagram and export_diagram keep the session they started with.
- Export to .drawio first gets the user's latest edits from the browser.
- History thumbnails: one that arrives after the next AI write is
dropped; a sync reply keeps the image; a version that changed only page
settings is its own entry.
- A diagram over the 10 MB limit is saved without its image, or the user
is told to download it (the server now answers 413 instead of cutting
the connection).
- Labels holding text like id='1' or parent='1' are no longer read as
attributes (a layer or a parent was deleted). A broken bare
<mxGraphModel> file is refused.
- After a sync reply the tab no longer sends its autosave copy again.
Desktop and files:
- A newer switch of the same preset is not rolled back by an older one
that failed. .env values with escaped quotes are read whole.
- MCP saved files: a file that could not be read stays protected while a
folder without permission hides it, and is saved again once deleted.
- The desktop app reports "no chats" only when the count was read and no
model settings are stored.
Found by the second PR review:
- After a streamed edit, an older render of the stream stored the edit's
original diagram again, and the next failed request (no quota, a lost
connection) put that old diagram back on the canvas. The tool handler
now marks its call as handled, so the preview code leaves it alone.
- An edit applied before the UI showed an earlier broken edit's error was
erased when that error undid its preview, or was built on that preview.
The handler now starts from the diagram before all unhandled previews,
and reads the diagram state that updates at once.
- A failed or stopped display_diagram left its half drawn diagram on the
canvas. Its preview is undone now, like an edit's.
- "New chat" cleared a chat that could not be saved (storage full).
- The settings dialog showed a model list, a fetch error or a test result
on the provider that was opened after the request started, and marked a
model id changed during the test as tested.
- A tool call with broken JSON was shown as cut off by the output limit.
- History entries and session thumbnails could pair with a later diagram
when draw.io answered an export late.
- A server model saved before non-ASCII provider names got into the id
was reset to the default model.
- Template dialogs no longer submit the outer chat form
- Sending is blocked while files or URLs are still extracting
- File and URL extraction no longer drop or resurrect entries
- IME composition Enter no longer sends
- Tool call cards show the error text; keyboard handling on cards fixed
- Template import available when empty, edit dialog resets, saved templates refresh
- Only png/jpeg/gif/webp images accepted, SVG sent as text; PDF objects released
- parse-url request sends the access code
* fix: reduce CPU usage during large XML streaming
Skip Prism syntax highlighting while tool call is streaming — use plain
<pre> during streaming and only run Prism once at completion. Also throttle
scrollIntoView to once per 150ms to avoid layout thrashing.
Profiled with Playwright + CDP: for 200-cell diagrams the longest
browser task dropped from 6.7s to ~450ms and total long-task time
fell from ~10.9s to ~1.1s.
* fix: add trailing edge to scroll throttle
Ensures the chat scrolls to the bottom after streaming ends, even if
the last messages update arrives during the 150ms throttle window.
* [Feature] Add VLM-based diagram validation
Add automatic VLM (Vision Language Model) validation after display_diagram
tool execution. The system captures a screenshot of the rendered diagram,
sends it to a VLM for visual analysis, and uses feedback to improve
diagram quality through the existing retry mechanism.
Changes:
- Add /api/validate-diagram endpoint for VLM validation
- Add diagram-validator.ts for client-side validation orchestration
- Add validation-prompts.ts for VLM system prompts
- Add ValidationCard component to display validation status in chat
- Add PNG capture functionality to diagram context
- Integrate validation into tool handlers with retry support (max 3)
- Add "Improve with Suggestions" button for manual regeneration
- Add settings toggle to enable/disable VLM validation
- Add getValidationModel() helper in ai-providers.ts
* refactor(validation): use AI SDK structured outputs and address review feedback
- Replace generateText + manual JSON parsing with generateObject and Zod schema
for type-safe structured validation output
- Use AbortSignal.timeout() instead of Promise.race for cleaner timeout handling
- Add timeout validation with minimum 1000ms to handle malformed env values
- Remove unused xml parameter from validateRenderedDiagram API
- Remove parseValidationResponse function (now handled by schema)
- Clear validationStates on session switch and new chat to prevent memory leak
- Update 100ms render delay comment to clarify best-effort heuristic
- Remove unused useEffect import from ValidationCard
- Fix optional chaining lint warning in ValidationCard
- Add unit tests for formatValidationFeedback function
* refactor(validation): use AI SDK experimental_useObject hook instead of raw fetch
- Change API endpoint from generateObject to streamObject for useObject compatibility
- Create useValidateDiagram hook using AI SDK's experimental_useObject for reactive validation
- Update useDiagramToolHandlers to accept validation function as parameter
- Update chat-panel to use new useValidateDiagram hook
- Remove validateRenderedDiagram function from lib/diagram-validator.ts (now in hook)
- Export ValidationResultSchema from API route for client-side use
* fix(validation): extract schema to shared file for client/server compatibility
Move ValidationResultSchema to lib/validation-schema.ts to avoid importing
server-side modules (ai-providers) into client-side code. This fixes the
Turbopack build error caused by the hook importing from the API route.
* fix(validation): use 'Valid' instead of 'Complete' for validation success
Change ValidationCard success label from 'Complete' to 'Valid' to avoid
conflicting with ToolCallCard's 'Complete' badge in E2E tests. This fixes
the diagram-generation E2E test that expects a specific count of 'Complete'
badges.
* fix(validation): add aria-hidden to icons to prevent duplicate ID warning
* fix: improve VLM validation with bug fixes and i18n
- Fix race condition in pendingValidationRef (reject previous pending validation)
- Fix response format consistency (use streaming for all responses)
- Remove dead code (unused lastRequestRef and ValidationRequest interface)
- Consolidate duplicate types (re-export from validation-schema.ts)
- Add 'success_with_warnings' status for valid diagrams with warnings
- Fix tool card auto-collapse (only collapse once, respect user toggle)
- Set VLM validation default to disabled
- Add i18n support for diagram validation settings (en/zh/ja)
- Mark feature as experimental in settings UI
* fix: resolve TypeScript errors in electron-standalone
- Add forwardRef support to ChatInput component with ChatInputRef type
- Copy electron.d.ts to electron-standalone/electron folder
- Exclude electron-standalone from root tsconfig type checking
* fix: return empty string for valid result with no issues in formatValidationFeedback
* feat(i18n): add validation strings for ValidationCard component
- Add validation section to en.json, zh.json, ja.json dictionaries
- Update ValidationCard to use useDictionary hook
- Replace all hardcoded English strings with i18n keys
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Co-authored-by: dayuan.jiang <[email protected]>
dayuan.jiang