open-webui · tjbck · Jun 6, 2026 · Jun 6, 2026 · Jun 6, 2026 · Jun 6, 2026
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
@@ -2,12 +2,12 @@ name: Docker (GHCR)
 
 on:
   push:
-    branches: [main]
+    branches: [main, release]
   workflow_dispatch:
 
 concurrency:
   group: docker-${{ github.ref }}
-  cancel-in-progress: false
+  cancel-in-progress: true
 
 env:
   IMAGE: ghcr.io/${{ github.repository }}
@@ -63,9 +63,19 @@ jobs:
             echo "No version change detected"
           fi
 
-  build-and-push-dev:
+  build-dev:
     if: github.ref == 'refs/heads/main'
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+            arch: amd64
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
+            arch: arm64
+    runs-on: ${{ matrix.runner }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -80,30 +90,75 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract metadata (dev tags, labels)
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.IMAGE }}
-          tags: |
-            type=raw,value=dev
-            type=sha,prefix=dev-
-
-      - name: Build and push dev image
+      - name: Build and push ${{ matrix.platform }} dev image by digest
+        id: build
         uses: docker/build-push-action@v6
         with:
           context: .
-          push: true
-          platforms: linux/amd64,linux/arm64
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-
-  build-and-push-release:
+          platforms: ${{ matrix.platform }}
+          outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=dev-${{ matrix.arch }}
+          cache-to: type=gha,mode=max,scope=dev-${{ matrix.arch }}
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-dev-${{ matrix.arch }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge-dev:
+    if: github.ref == 'refs/heads/main'
+    needs: build-dev
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-dev-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create dev multi-arch manifest
+        working-directory: /tmp/digests
+        run: |
+          SHORT_SHA="${GITHUB_SHA::7}"
+          docker buildx imagetools create \
+            -t "${{ env.IMAGE }}:dev" \
+            -t "${{ env.IMAGE }}:dev-${SHORT_SHA}" \
+            $(printf '${{ env.IMAGE }}@sha256:%s ' *)
+
+  build-release:
     needs: detect-version-change
     if: github.ref == 'refs/heads/release' && needs.detect-version-change.outputs.version_changed == 'true'
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+            arch: amd64
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
+            arch: arm64
+    runs-on: ${{ matrix.runner }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -118,23 +173,59 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract metadata (release tags, labels)
-        id: meta
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.IMAGE }}
-          tags: |
-            type=raw,value=latest
-            type=raw,value=${{ needs.detect-version-change.outputs.version }}
-            type=semver,pattern={{major}}.{{minor}},value=v${{ needs.detect-version-change.outputs.version }}
-
-      - name: Build and push release image
+      - name: Build and push ${{ matrix.platform }} release image by digest
+        id: build
         uses: docker/build-push-action@v6
         with:
           context: .
-          push: true
-          platforms: linux/amd64,linux/arm64
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          platforms: ${{ matrix.platform }}
+          outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=release-${{ matrix.arch }}
+          cache-to: type=gha,mode=max,scope=release-${{ matrix.arch }}
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-release-${{ matrix.arch }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge-release:
+    needs: [detect-version-change, build-release]
+    if: github.ref == 'refs/heads/release' && needs.detect-version-change.outputs.version_changed == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-release-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create release multi-arch manifest
+        working-directory: /tmp/digests
+        run: |
+          VERSION="${{ needs.detect-version-change.outputs.version }}"
+          MAJOR_MINOR="${VERSION%.*}"
+          docker buildx imagetools create \
+            -t "${{ env.IMAGE }}:latest" \
+            -t "${{ env.IMAGE }}:${VERSION}" \
+            -t "${{ env.IMAGE }}:${MAJOR_MINOR}" \
+            $(printf '${{ env.IMAGE }}@sha256:%s ' *)
diff --git a/Dockerfile b/Dockerfile
@@ -1,5 +1,5 @@
 # ── Stage 1: Build the SvelteKit frontend ──────────────────
-FROM node:22-slim AS frontend-builder
+FROM --platform=$BUILDPLATFORM node:22-slim AS frontend-builder
 
 WORKDIR /build/frontend
 COPY cptr/frontend/package.json cptr/frontend/package-lock.json ./
@@ -9,7 +9,7 @@ RUN npm run build
 
 
 # ── Stage 2: Install Python dependencies & build wheel ─────
-FROM ghcr.io/astral-sh/uv:python3.12-bookworm-slim AS backend-builder
+FROM --platform=$BUILDPLATFORM ghcr.io/astral-sh/uv:python3.12-bookworm-slim AS backend-builder
 
 WORKDIR /build
 COPY pyproject.toml uv.lock LICENSE README.md CHANGELOG.md ./

diff --git a/README.md b/README.md
@@ -44,6 +44,25 @@ Opens in your browser. From other devices:
 cptr run --host 0.0.0.0
 ```
 
+## Docker
+
+Run cptr with Docker:
+
+```bash
+docker run --rm -it \
+  -p 8000:8000 \
+  -v cptr-data:/data \
+  -v "$PWD:/workspace" \
+  -w /workspace \
+  ghcr.io/open-webui/computer:latest
+```
+
+Then open the URL printed in the logs, usually `http://localhost:8000/?token=...`.
+
+`cptr` stores its state in `/data`. Mount your project into the container, like `-v "$PWD:/workspace"`, so cptr can access it.
+
+The `:dev` image is also available and tracks the `main` branch.
+
 ## License
 
 Open Use License. Source available. All rights reserved. See [LICENSE](LICENSE). [Enterprise licenses available](mailto:sales@openwebui.com).
diff --git a/cptr/env.py b/cptr/env.py
@@ -25,6 +25,8 @@
 ENABLE_CHAT_RECONCILE_ON_STARTUP: bool = os.environ.get(
     "ENABLE_CHAT_RECONCILE_ON_STARTUP", "true"
 ).lower() in ("true", "1", "yes")
+CHAT_TOOL_MAX_CHARS = int(os.environ.get("CHAT_TOOL_MAX_CHARS", "50000"))
+CHAT_TOOL_COMMAND_MAX_CHARS = int(os.environ.get("CHAT_TOOL_COMMAND_MAX_CHARS", "8000"))
 
 # ── AI stream settings ──────────────────────────────────────
 STREAM_CONNECT_TIMEOUT_SECONDS = float(os.environ.get("CPTR_STREAM_CONNECT_TIMEOUT", "30"))

diff --git a/cptr/frontend/src/lib/apis/chat.ts b/cptr/frontend/src/lib/apis/chat.ts
@@ -66,7 +66,7 @@ export const sendMessage = (
 	parentId?: string | null,
 	params: { tool_approval_mode?: string } = {},
 	regenerationPrompt?: string,
-	files?: string[]
+	files?: { id: string; name: string; url: string; type: string }[]
 ) =>
 	fetchJSON<SendMessageResult>(
 		'/api/chats',

diff --git a/cptr/frontend/src/lib/apis/files.ts b/cptr/frontend/src/lib/apis/files.ts
@@ -30,6 +30,9 @@ export const createEntry = (path: string, type: 'file' | 'directory') =>
 export const uploadFiles = (path: string, form: FormData) =>
 	fetchHandler('/api/workspace/files/upload', { method: 'POST', body: form });
 
+export const uploadFile = (form: FormData) =>
+	fetchJSON<{ id: string; url: string }>('/api/files', { method: 'POST', body: form });
+
 export const downloadArchive = (paths: string[]) =>
 	fetchHandler('/api/workspace/files/archive', { method: 'POST', ...jsonBody({ paths }) });
 

diff --git a/cptr/frontend/src/lib/components/Icon.svelte b/cptr/frontend/src/lib/components/Icon.svelte
@@ -146,11 +146,11 @@
 			d="M16 12H17.4C17.7314 12 18 12.2686 18 12.6V19.4C18 19.7314 17.7314 20 17.4 20H6.6C6.26863 20 6 19.7314 6 19.4V12.6C6 12.2686 6.26863 12 6.6 12H8M16 12V8C16 6.66667 15.2 4 12 4C8.8 4 8 6.66667 8 8V12M16 12H8"
 		/>
 	{:else if name === 'docker'}
-		<path d="M15.5 5.5H18.5V8.5H22C22 8.5 22 11.5 19 13C18.5 13.2778 18 13.5 17.5 13.5" />
-		<path d="M1 11.5C1 11.5 2.5 8 6 8H8M3.5 8.5H6.5V11.5H0.5" />
-		<path d="M6.5 5.5H9.5V8.5" /><path d="M9.5 5.5H12.5V8.5" />
-		<path d="M12.5 5.5H15.5V8.5" /><path d="M9.5 8.5H12.5V11.5" />
-		<path d="M12.5 8.5H15.5V11.5" />
+		<path
+			fill="currentColor"
+			stroke="none"
+			d="M13.983 11.078h2.119a.186.186 0 0 0 .186-.185V9.006a.186.186 0 0 0-.186-.186h-2.119a.185.185 0 0 0-.185.185v1.888c0 .102.083.185.185.185m-2.954-5.43h2.118a.186.186 0 0 0 .186-.186V3.574a.186.186 0 0 0-.186-.185h-2.118a.185.185 0 0 0-.185.185v1.888c0 .102.082.185.185.185m0 2.716h2.118a.187.187 0 0 0 .186-.186V6.29a.186.186 0 0 0-.186-.185h-2.118a.185.185 0 0 0-.185.185v1.887c0 .102.082.185.185.186m-2.93 0h2.12a.186.186 0 0 0 .184-.186V6.29a.185.185 0 0 0-.185-.185H8.1a.185.185 0 0 0-.185.185v1.887c0 .102.083.185.185.186m-2.964 0h2.119a.186.186 0 0 0 .185-.186V6.29a.185.185 0 0 0-.185-.185H5.136a.186.186 0 0 0-.186.185v1.887c0 .102.084.185.186.186m5.893 2.715h2.118a.186.186 0 0 0 .186-.185V9.006a.186.186 0 0 0-.186-.186h-2.118a.185.185 0 0 0-.185.185v1.888c0 .102.082.185.185.185m-2.93 0h2.12a.185.185 0 0 0 .184-.185V9.006a.185.185 0 0 0-.184-.186h-2.12a.185.185 0 0 0-.184.185v1.888c0 .102.083.185.185.185m-2.964 0h2.119a.185.185 0 0 0 .185-.185V9.006a.185.185 0 0 0-.184-.186h-2.12a.186.186 0 0 0-.186.186v1.887c0 .102.084.185.186.185m-2.92 0h2.12a.185.185 0 0 0 .184-.185V9.006a.185.185 0 0 0-.184-.186h-2.12a.185.185 0 0 0-.184.185v1.888c0 .102.082.185.185.185M23.763 9.89c-.065-.051-.672-.51-1.954-.51-.338.001-.676.03-1.01.087-.248-1.7-1.653-2.53-1.716-2.566l-.344-.199-.226.327c-.284.438-.49.922-.612 1.43-.23.97-.09 1.882.403 2.661-.595.332-1.55.413-1.744.42H.751a.751.751 0 0 0-.75.748 11.376 11.376 0 0 0 .692 4.062c.545 1.428 1.355 2.48 2.41 3.124 1.18.723 3.1 1.137 5.275 1.137.983.003 1.963-.086 2.93-.266a12.248 12.248 0 0 0 3.823-1.389c.98-.567 1.86-1.288 2.61-2.136 1.252-1.418 1.998-2.997 2.553-4.4h.221c1.372 0 2.215-.549 2.68-1.009.309-.293.55-.65.707-1.046l.098-.288Z"
+		/>
 	{:else if name === 'empty-page'}
 		<path
 			d="M4 21.4V2.6C4 2.26863 4.26863 2 4.6 2H16.2515C16.4106 2 16.5632 2.06321 16.6757 2.17574L19.8243 5.32426C19.9368 5.43679 20 5.5894 20 5.74853V21.4C20 21.7314 19.7314 22 19.4 22H4.6C4.26863 22 4 21.7314 4 21.4Z"