GET /drawio/<path> serves dist/drawio with a MIME table, a day of
caching and nosniff; paths are normalized and never reach WEB-INF or
META-INF. The preview embeds /drawio/index.html when the copy exists and
DRAWIO_BASE_URL is unset, else the external draw.io as before (and
start_session says so). Every /api request must carry the per-process
X-Drawio-Token the page gets in its HTML; pages send
frame-ancestors 'self' and nosniff.
scripts/fetch-drawio.mjs downloads the pinned draw.war into a cache
(DRAWIO_WAR_CACHE, or DRAWIO_WAR for a local file), checks its SHA-256
and extracts the files named in drawio-files.txt plus a LICENSE with the
Apache-2.0 text. scripts/check-drawio-files.mjs drives the embedded
editor in headless Chromium from a full copy, records every requested
file and checks or rewrites (--update) the list.
The boundary test scans the canvas modules' imports and bundles the canvas components with esbuild; both fail on anything from components/chat, the tool handlers, next/navigation, next/font, next/script, next/headers or a server-only module. The card test renders VersionCard and VersionStrip on a fake VersionsSource.
The canvas components will be reused by the MCP server's browser shell,
which has no chat and no Next.js. They now read everything they need
from small contexts and the canvas store instead of the chat engine:
- components/canvas/versions-context.tsx: VersionsProvider and
useVersionsContext give the version cards, the strip and the compare
dialog a VersionsSource (versions, onCanvasId, undoneId, isBusy,
canUndo, canRedo, restore, undo, redo). The chat fills it from the
versions store and the engine in components/chat/chat-versions.tsx.
- stores/canvas-store.ts: isBusy and busyReason; the chat engine sets
them while a turn runs, SelectionAsk and the version UI read them.
- components/canvas/version-card.tsx: the visual version card and the
thumbnail, out of tool-activity.tsx; the chat's card composes it and
adds its "Show XML" link and code panel.
- compare-dialog.tsx and version-strip.tsx move to components/canvas;
the strip takes the minimum number of versions to show as a prop, the
chat panel computes it from the cards it has.
- components/canvas/locale-context.tsx: LocaleProvider and useLocale,
fed by the [lang] layout; CanvasStage no longer uses next/navigation.
The overlay (SelectionAsk) is a slot and the wait for the saved
language is a prop, so the shell can leave both out.
- lib/version-text.ts: describeChanges is now describeChangeSummary, so
it can be imported next to the MCP core's describeChanges.
* feat(mcp-server): optional screenshot attached to create_new_diagram and edit_diagram results
Both write tools take an optional boolean `screenshot`; the default comes
from DRAWIO_AUTO_SCREENSHOT. The body of screenshot_diagram moved into
captureScreenshot so the write tools can append the PNG and checklist to
their result, or a "Screenshot skipped" note when the preview tab is not
available. The preview page delays the PNG export by 600 ms right after
loading a new version so icon images finish loading.
* fix(mcp-server): review fixes for screenshot attached to create and edit results
* fix(mcp-server): Codex review fixes for the screenshot on write results
- A cleared canvas also gets the screenshot note when one was asked for
- The note for a tab that never polled says it may not have connected yet
* docs: list undo and custom drawing rules among the MCP features
* test(mcp-server): truncation check with named styles and compact cells after the merge
* feat(mcp-server): load .drawio.svg (Editable SVG) files with load_diagram
* feat(mcp-server): summarize the user's manual changes per cell in stale rejections and get_diagram
* feat(mcp-server): XML reference for tables, layers and groups via get_drawing_guide topic
* feat(mcp-server): DRAWIO_LANG, DRAWIO_UI and DRAWIO_DARK for the preview page
Three host-config environment variables fix the language, theme and
dark mode of the draw.io editor embedded in the preview page. The new
drawio-themes module holds the theme list and draw.io's locale names
(zh-hant becomes zh-tw); drawioEmbedParams() in http-server.ts builds
the variable tail of the iframe query and getHtmlPage fills the new
{{DRAWIO_PARAMS}} placeholder. Without the variables the page keeps
sending dark=auto as before. Both READMEs document the variables.
* feat(mcp-server): report XML cut off inside a cell and explain drawing in parts
create_new_diagram and add_page now detect bare-cell XML that ends inside an
unfinished mxCell (XML comments stripped first) and return an error with the
last 300 characters of the input, asking the model to resend from that cell or
continue with edit_diagram add operations. isMxCellXmlComplete moves from
lib/utils.ts into packages/mcp-server/src/new-diagram.ts and is re-exported
from lib/utils.ts for the web app. The drawing guide gains a "Large diagrams"
paragraph and the INSTRUCTIONS edit_diagram line mentions drawing in parts.
* fix(mcp-server): review fixes for load .drawio.svg, change summary, XML reference, draw.io embed options, truncation message
* fix(mcp-server): Codex review fixes for .drawio.svg loading, change summary, references, embed options and truncation
- Truncation check: a closing tag such as </mxCell/> that the auto-fix
repairs is no cut, and input without any cell keeps the validator's
message
- Guide: a call rejected as cut off drew nothing, so all of its cells are
sent again; the topic pointer is its own paragraph
- Change summary: decoded labels (no or merged words from <br>),
a fast path for equal XML, and "the order of the cells changed" as
the fallback
- DRAWIO_UI in any case, DRAWIO_LANG=zh-Hans maps to draw.io's zh
- load_diagram and export_diagram describe which files load again
* feat: redraw the app icon on a white tile with shorter bottom boxes
Same org chart shape as before, redrawn as a vector so edges are sharp.
The white tile keeps the icon visible on dark docks, taskbars and tabs,
so dark mode now uses the same image and favicon-white.svg is removed.
The desktop icon is now 1024x1024.
* chore: add SVG sources for the app icon and favicons
resources/icon.svg renders resources/icon.png; resources/favicon.svg renders
the favicon .ico and .png files.
* fix: add a title to the icon SVG sources for the Biome a11y check
* feat(mcp-server): list and resume saved diagram sessions
start_session accepts an optional session_id to continue a saved diagram
under the same preview URL and auto-save file, reporting the restored
pages. New read-only tool list_saved_diagrams prints every auto-saved
file newest first with its pages. Autosaver gains list() and dataDir().
INSTRUCTIONS and both READMEs mention the new tool.
* feat(mcp-server): add restore_version tool for undo and redo from History
Add the restore_version write tool so the model can put an earlier
version from History back on the canvas (steps_back, default 1). The
current canvas is kept in History unless it is the blank page, so a redo
is possible. http-server.ts exports restoreHistoryEntry, shared by the
HTTP restore endpoint and the tool; history.ts exports HistoryEntry and
otherVersions (distinct versions other than the canvas, newest first).
The drawing guide tells the model to call restore_version when the user
asks to undo, and both READMEs document the tool.
* feat(mcp-server): save the diagram History next to the auto-saved file
The Autosaver writes each session's History (the XML of its last 20 versions, without thumbnails) to <session-id>.history.json beside the .drawio file, after the same 1 second delay and only when the entries changed. When a saved session is resumed after an idle timeout or a process restart, the saved History is loaded back before the diagram, so the History panel and restore_version keep working. Removing the oldest files also removes their History files.
* fix(mcp-server): review fixes for saved sessions, undo tool, history on disk
* fix(mcp-server): Codex review fixes for saved sessions, undo and History on disk
- start_session resumes every saved file, also a cleared one or one of
empty named pages, and decompresses pages draw.io compressed
- History kept by a lost user edit or a recovering tab is saved too
- A diagram cleared before its first save keeps its History on disk
- The History file is written again after the 50-file cap removed it
- restore_version compares versions like the edit gate (a bare
mxGraphModel from the browser has no page name), checks the restore
result, and says "none" when no version is left
- The preview closes an open History list when the server state was
recreated, since the entries got new ids
- start_session's description mentions session_id
* fix(mcp-server): compare History versions pairwise and tie restores to the server state
Second Codex review of the History fixes:
- One bare mxGraphModel in History no longer hides page renames in every
comparison: names are left out only when one of the two is bare
- A History list asked for before the server recreated the session is
dropped, and a restore names the state its list belongs to; the server
refuses one from a lost state (History ids change after a restart)
* fix(mcp-server): restore from a History list with the state it was taken in
Third Codex review: a restore sent the tab's current state, so an old
list shown after a failed refresh passed the server's check. The list now
keeps the state it came from, and the server refuses a missing (null)
state too; only a tab of an older version, which sends none, is let
through.
* feat(mcp-server): add source-reading and clear-canvas hints to the drawing guide
Carry the missing web-prompt sentences into the MCP drawing guide: draw from
a document, image or web page by reading it yourself first, compare image
replications with screenshot_diagram, keep replies short after a successful
draw, compose artistic requests from standard shapes, and clear the canvas by
sending only the two root cells. Replace the "If the diagram is large" bullet
with guidance on choosing create_new_diagram vs edit_diagram.
The server INSTRUCTIONS mention reading files yourself and opening .drawio
files with load_diagram; the create_new_diagram description documents the
clear-canvas call, and its handler reports "Canvas cleared" when the prepared
XML holds only the root cells. Add tests for both and the matching README
lines in the mcp-server and claude-plugin packages.
* feat(mcp-server): append the user's instructions.md to the drawing guide
Read <DRAWIO_DATA_DIR>/instructions.md (default ~/.next-ai-drawio) on
every call and append its first 5000 characters to the drawing guide
under a "## Custom Instructions" heading, for start_session,
get_drawing_guide and the diagram-workflow prompt. start_session now
tells the model where the file lives. Document the feature in both
READMEs and cover it with unit and server-wiring tests.
* fix(mcp-server): review fixes for drawing guide text and custom instructions file
* fix(mcp-server): Codex review fixes for the guide and custom instructions
- Report "Canvas cleared" only for a one-page document; several empty
pages get the page summary
- Build the instructions.md path with path.join (Windows separators)
- Keep the 15000-character guide budget in the wiring test
- Plugin README: DRAWIO_DATA_DIR also holds instructions.md
Agents frequently hold .drawio content in memory (another tool's output,
a repository read, an API response) and previously had to write it to a
temporary file just so load_diagram could read it back. Add a mutually
exclusive 'xml' argument that goes through the same parser as the 'path'
branch, so both plain XML and draw.io's compressed save format work.
Edit-gate semantics by source:
- 'path': unchanged — the model has not seen the content, one
get_diagram round-trip is still required before editing.
- plain 'xml': the model supplied the exact content (same rationale as
create_new_diagram), so it is recorded as seen and can be edited
immediately.
- compressed 'xml': the session stores the decompressed form, which the
model cannot derive from the compressed input — the gate is kept.
Argument validation (mutual exclusion / presence) fires before the
session check so callers get useful errors regardless of session state.
parseDrawioFileContent now reports whether any page was decompressed,
which drives the gate decision. The diagram-workflow prompt is updated
to document the new argument.
Co-authored-by: caoxiaole07 <[email protected]>
Issues labelled "wait for confrim" get a reminder and the "no response"
label after 15 days without activity, and are closed as not planned after
15 more. A reply from the reporter removes both labels.
The test clicked the canvas at (10, 10) to deselect. When the click on the
shape before it needed retries, Playwright scrolled the shape into the
container's top-left corner, so the next click landed on the shape and the
selection stayed (seen on the main run of cd5352c and on #973). The new
clickEmptyCanvas helper clicks the corner farthest from the shape.
Reproduced locally by scrolling the shape into the corner: the old click
keeps the selection, the helper clears it.
* fix(chat): the AI reads and draws the page the user is viewing
The model always got the first page and display_diagram replaced the whole
file with one page, so drawing on page 3 of a multi-page file deleted the
other pages (#241), and edits went to page 1 while the user looked at
another page.
Now a turn records the page the user is viewing when the message is sent.
That page's model goes to the model (also as previousXml, on regenerate and
in edit_diagram error messages), selected shapes are sent on any page,
display_diagram and append_diagram replace only that page (a drawing that
brings several pages still replaces the file), edit_diagram targets it,
and the streaming preview draws on it. Compact cells and default styles
take the layer and the edges of that page, in the preview and in
editDiagram. The editor bridge replaces the current page in place when the
other pages are unchanged, so Ctrl+Z undoes an AI change on a multi-page
file in one step; when a full load is needed, the user's page is shown
again afterwards. Version summaries and the compare dialog count the page
the change was made on.
* test: read the failed edit's output without unsafe optional chaining
The model defines reused styles once as <mxStyle name="..." value="..."/> and
refers to them by name, and writes shapes as one self-closing mxCell with
x, y, w, h and edges with source and target. style-classes.ts and
compact-cells.ts expand both back into standard draw.io XML after validation
and add draw.io's html=1 / whiteSpace=wrap defaults; the diagram shown to the
model is folded into the same notation. Prompts, tool descriptions and the MCP
drawing guide teach the notation with shared examples.
Measured on the five start-screen examples against main: gpt-6-luna 35% fewer
output tokens, Claude Opus 5.5 41% fewer. Two five-model review rounds fixed
quote-aware cell matching, attribute escaping, edge/vertex inference, root-id
and layer handling, and several auto-fix gaps.
electron-builder.yml hard-coded electronVersion: 39.2.7 since #448, so every
desktop release, including v0.5.0, shipped Electron 39.2.7 no matter which
version package.json asked for. Removing the line makes electron-builder use
the installed version (checked: the packaged Electron Framework reports
41.10.7 and the app starts and serves its page). Electron 41.10.7 fixes the
four open Electron advisories (popup sandbox, webview Node integration,
protocol handler cross-origin reads, sandboxed window inheritance) and its
@electron/get 5 drops extract-zip, which clears two more alerts.
npm audit fix in the root and in packages/mcp-server. proxy-addr 2.0.8 fixes
the IP spoofing through IPv4-mapped IPv6 trust subnets (GHSA-jqcg-44mw-7w3h),
shell-quote 1.12.0 fixes the command injection through a line terminator, and
wrangler 4.149.0 brings a miniflare that no longer bundles the vulnerable
sharp 0.35.4. No package is added; 56 lock entries for miniflare's sharp
binaries go away.
A Request's signal follows the signal it was created with through a weak
link inside undici: once the Request object is garbage collected, the link is
gone and request.signal never aborts (nodejs/undici#3644). The chat route
passes req.signal to streamText and holds nothing else from the request, so a
GC pause during a stream could leave the model call running after the client
stopped or disconnected, with no onAbort accounting.
The route now keeps each request in a WeakMap keyed by its response, which
Next holds while the body is piped.
This is also the cause of the unit test chat-route-abort hanging on CI (three
times this week, 60 ms locally): the test's Request is dropped as soon as the
route returns, and a GC in that window lost the abort. With a forced GC the
test hangs on Node 20 and 24 without this change and passes with it.
Labels are two to four words, descriptions one short line, and the
wording follows the reader rather than the implementation: "服务商"
instead of "provider", "本页设置" instead of "后台设置" for the source
chip (it shared its name with the page title), "需重启" as a badge, a
verb on every switch ("访问内网"), "Langfuse 密钥" instead of "私钥".
Descriptions keep the facts the old ones had (where to change an
env-managed provider, that users must enter an access code), and the
same style is applied to the English, Japanese and Traditional Chinese
dictionaries. Five user-facing strings in the same files are aligned
with the new terms (服务商, token).
Start screen
- The five examples are one row of picture tiles (title under the picture); the old cards cut their descriptions off with an ellipsis
- "Open .drawio file" leaves the example grid and sits with "Start with a blank canvas" below it, both as outlined buttons
- The "Paper to diagram" example gets a thumbnail of its result (public/paper_demo.svg) like the other four
- The caption says what happens: examples use saved answers, so they appear at once and do not call the AI
- Shorter lede
Chat panel
- The version card's "</>" icon button becomes a "Show XML" text link in the summary line; the summary runs under the title row, so Undo is the card's only button
- Settings uses the gear icon; new diagram uses a file-plus icon instead of the pen that reads as "edit"
- The message box has the same side padding as the message column
Copy
- The model picker says "Server model" instead of "Default" when the server's model is in use
- The theme description no longer claims the diagram always stays on a white sheet (the canvas follows the theme)
- en, zh, ja and zh-Hant dictionaries updated together
* docs: restructure the README around the new promo video
The three READMEs now follow the reader's path: what it is (video and
two paragraphs), highlights grouped as draw / edit / use, examples, how
to use it (demo, desktop app, MCP), how to self-host (local run, a
one-click deploy table, models and providers), and support.
Removed the table of contents, the sponsor blocks, the "How It Works"
section, the duplicated demo button and the model recommendation list.
The provider list now matches env.example (24 providers). The video is
the new 30-second promo. Bold markers inside the HTML example table are
now <strong> tags, so they render.
* docs: keep the TrendShift badge under the language switch
* chore: remove the sponsor material for Doubao and Atlas Cloud
The about pages lose the "Sponsored by ByteDance Doubao" card, the
promotional links in the provider list and the thanks paragraph; the
"bring your own key" note stays. The quota toast no longer shows the
Volcengine sign-up paragraph, and its messages in the four languages no
longer mention a sponsor. The provider guides lose the "free tokens"
promo line. The logo and invite images used only by that material are
deleted. Doubao and Atlas Cloud remain supported providers.
While an edit streams, the preview applies the operations received so
far. Chrome's DOMParser keeps a cell whose XML is cut off, so a vertex
without its geometry reached the canvas. draw.io placed it at the origin,
shifted the page layout and compensated the scroll position, and the
browser's clamping of that compensation left the diagram out of view
once the edit finished.
Check each new_xml with getXmlSyntaxError, as the whole document
already is, so an incomplete operation is reported instead of applied.
* ci: run the e2e tests in four shards
One job ran all 300+ tests with one worker, about 20 minutes. Four
jobs at once take a quarter each, still with one worker per job.
* ci: six e2e shards
With four, the shard of the long workspace tests took 8 minutes while
the others took 4 to 5.
Tabs Models, General, Drawing and About, each with a fixed title row.
The models tab becomes three pages: the user's providers with one status
each and the server's models; a searchable picker of all 24 providers in
four groups; and a provider page in three steps (connection, models,
test). A new provider gets its first suggested model, and a passing test
offers to use the model in the chat. Bedrock asks for one way of signing
in, with an optional session token for temporary access keys.
The composer's model picker lists every model, marking untested and
failed ones, and can open the provider picker. A chat error that offers
model settings opens the provider the request went to.
The canvas now fills the window and the chat floats on its right. draw.io is
served from our own origin (public/drawio, downloaded at build time and
checked against the release's SHA-256), so the app can drive the editor
directly:
- every AI change becomes a version card with a thumbnail; compare, restore
or undo it, and Ctrl+Z on the canvas takes an AI change back in one step
- shapes the AI just changed are highlighted on the canvas
- selected shapes appear as a chip and are sent to the model
- draw.io's own simple UI: its toolbar, menus (auto layout, Mermaid, CSV
import) and page tabs; the shape library starts closed
- new start screen, session rename and switcher, open .drawio files
- settings split into Models & keys, Appearance, Advanced and About
- Bedrock in the model settings also takes an API key instead of access keys
- phones switch between canvas and chat
- dark mode uses draw.io's own dark mode, with neutral greys around it
With an external draw.io (NEXT_PUBLIC_DRAWIO_BASE_URL) the features above
that need same origin are off.
The chat logic moved from the 1500-line chat panel into a chat engine plus
small UI components; zustand holds canvas, versions, settings and UI state.
Two optional settings for deployments behind a CDN such as Cloudflare.
CLIENT_IP_HEADER names the header that holds the visitor's real IP
(cf-connecting-ip on Cloudflare). The per-IP daily quota used the first
X-Forwarded-For entry, which visitors can set to anything, so a made-up
IP on every request got a fresh quota.
ORIGIN_SECRET makes proxy.ts refuse /api requests whose X-Origin-Secret
header does not match. The CDN adds the header, so a call that skips the
CDN, and could fake the IP header, gets 403. Pages are not checked, which
keeps health checks on / working.
Both are unset by default, and nothing changes then.
On the server's own credentials a provider 403 now gets its own code,
server_key_forbidden, with a hint in all four languages: today's free
quota is used up, it resets tomorrow, and users can add their own key
in model settings. The generic "The provider returned an error." line
is left out for this code.
A daily spend cap that blocks a shared key makes every call return 403.
The old hint said the key may lack access to the model or region, which
points users at a setting they cannot change.
A 403 on the user's own key keeps the old hint and the provider's text.
The Ollama SDK appends /chat to the base URL, and Ollama serves chat at
/api/chat. The model list already added the missing /api, so with
"http://localhost:11434" (the address our docs showed) models were listed
but every chat request went to /chat and got a 404. An OpenAI-style
".../v1" address went to /v1/chat.
ollamaApiUrl() turns the server address, ".../v1" and ".../api" into
".../api". Chat, the model list and the settings dialog's request URL
hint all use it. The docs now show http://localhost:11434/api, which also
works on released versions.
dayuan.jiang