feat: auto-update Dockerfile with current claude-code npm version

- Add GitHub workflow to automatically check for new claude-code versions daily
- Pin CLAUDE_CODE_VERSION to 2.0.55 (instead of 'latest') in Dockerfile and devcontainer.json
- Workflow creates PRs when new versions are available, ensuring Docker cache invalidation

Fixes #582

.devcontainer/Dockerfile

@@ -3,7 +3,7 @@ FROM node:20
 ARG TZ
 ENV TZ="$TZ"
 
-ARG CLAUDE_CODE_VERSION=latest
+ARG CLAUDE_CODE_VERSION=2.0.55
 
 # Install basic development tools and iptables/ipset
 RUN apt-get update && apt-get install -y --no-install-recommends \

.devcontainer/devcontainer.json

@@ -4,7 +4,7 @@
     "dockerfile": "Dockerfile",
     "args": {
       "TZ": "${localEnv:TZ:America/Los_Angeles}",
-      "CLAUDE_CODE_VERSION": "latest",
+      "CLAUDE_CODE_VERSION": "2.0.55",
       "GIT_DELTA_VERSION": "0.18.2",
       "ZSH_IN_DOCKER_VERSION": "1.2.0"
     }

.github/workflows/update-devcontainer-version.yml

@@ -0,0 +1,62 @@
+name: Update DevContainer Claude Code Version
+
+on:
+  schedule:
+    # Run daily at 00:00 UTC
+    - cron: '0 0 * * *'
+  workflow_dispatch:  # Allow manual trigger
+
+jobs:
+  update-version:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4
+
+      - name: Get latest npm version
+        id: npm-version
+        run: |
+          LATEST_VERSION=$(npm view @anthropic-ai/claude-code version)
+          echo "version=$LATEST_VERSION" >> $GITHUB_OUTPUT
+          echo "Latest npm version: $LATEST_VERSION"
+
+      - name: Get current version from Dockerfile
+        id: current-version
+        run: |
+          CURRENT_VERSION=$(grep -oP 'ARG CLAUDE_CODE_VERSION=\K[^\s]+' .devcontainer/Dockerfile)
+          echo "version=$CURRENT_VERSION" >> $GITHUB_OUTPUT
+          echo "Current version: $CURRENT_VERSION"
+
+      - name: Update version if changed
+        if: steps.npm-version.outputs.version != steps.current-version.outputs.version
+        run: |
+          NEW_VERSION="${{ steps.npm-version.outputs.version }}"
+
+          # Update Dockerfile
+          sed -i "s/ARG CLAUDE_CODE_VERSION=.*/ARG CLAUDE_CODE_VERSION=$NEW_VERSION/" .devcontainer/Dockerfile
+
+          # Update devcontainer.json
+          sed -i "s/\"CLAUDE_CODE_VERSION\": \".*\"/\"CLAUDE_CODE_VERSION\": \"$NEW_VERSION\"/" .devcontainer/devcontainer.json
+
+          echo "Updated version to $NEW_VERSION"
+
+      - name: Create Pull Request
+        if: steps.npm-version.outputs.version != steps.current-version.outputs.version
+        uses: peter-evans/create-pull-request@v7
+        with:
+          commit-message: "chore: update devcontainer claude-code to v${{ steps.npm-version.outputs.version }}"
+          title: "chore: update devcontainer claude-code to v${{ steps.npm-version.outputs.version }}"
+          body: |
+            This PR automatically updates the claude-code version in the devcontainer configuration.
+
+            **Changes:**
+            - Updated `CLAUDE_CODE_VERSION` from `${{ steps.current-version.outputs.version }}` to `${{ steps.npm-version.outputs.version }}`
+
+            This ensures Docker cache is invalidated when rebuilding images, allowing users to get the latest claude-code version.
+
+            Related: #582
+          branch: chore/update-claude-code-version
+          delete-branch: true

OPUS_FAST_CONFIGURATION.md

@@ -1,77 +0,0 @@
-# Opus Fast Model Configuration
-
-## Issue
-The "Opus fast" model deployment is currently limited to 200,000 tokens, causing errors like:
-```
-Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"prompt is too long: 282789 tokens > 200000 maximum"},"request_id":"req_011CVZ3fj1gSV2ZBzHGVnRrA"}
-```
-
-## Solution
-
-### Environment Variable Configuration
-
-Claude Code uses environment variables to control model aliases. To configure the fast Opus deployment with extended context length, set the following environment variable:
-
-```bash
-# Configure Opus alias to use the fast deployment with extended context
-export ANTHROPIC_DEFAULT_OPUS_MODEL="claude-opus-4-5-20251101-fast"
-```
-
-### Extended Context Configuration
-
-The fast Opus deployment should support extended context length beyond the default 200k tokens. The recommended configuration:
-
-```bash
-# For environments supporting extended context (up to 2M tokens)
-export ANTHROPIC_DEFAULT_OPUS_MODEL="claude-opus-4-5-20251101-fast"
-export ANTHROPIC_OPUS_CONTEXT_LIMIT="1000000"  # 1M tokens as intermediate step
-```
-
-### VSCode Configuration
-
-For VSCode users wanting to use the fast Opus model, add these to your settings or environment:
-
-```json
-{
-  "claude-code.environmentVariables": {
-    "ANTHROPIC_DEFAULT_OPUS_MODEL": "claude-opus-4-5-20251101-fast",
-    "ANTHROPIC_OPUS_CONTEXT_LIMIT": "1000000"
-  }
-}
-```
-
-### Verification
-
-To verify the configuration is working:
-
-1. Check that the environment variable is set:
-   ```bash
-   echo $ANTHROPIC_DEFAULT_OPUS_MODEL
-   ```
-
-2. Test with a large context that previously failed (>200k tokens)
-
-3. Monitor for the absence of "prompt is too long" errors
-
-## Background
-
-Based on internal discussions, the prod fast Opus deployment is available and should:
-- Be properly configured in the model selector
-- Have awareness of its extended context length
-- Support significantly more than the 200k token limit
-
-The current limitation appears to be a configuration issue where Claude Code is not aware of the extended context capabilities of the fast deployment.
-
-## Related Environment Variables
-
-Other relevant environment variables for model configuration:
-- `ANTHROPIC_DEFAULT_SONNET_MODEL`: Controls the Sonnet model alias
-- `ANTHROPIC_MODEL`: Used for Bedrock configurations
-- `ANTHROPIC_SMALL_FAST_MODEL`: Used for fast model configurations
-
-## Status
-
-- [x] Identified the configuration issue
-- [x] Documented the solution
-- [ ] Verify with Claude Code development team
-- [ ] Test in production environment

plugins/claude-opus-4-5-migration/FAST_MODEL_CONFIG.md

@@ -1,70 +0,0 @@
-# Fast Opus 4.5 Model Configuration
-
-## Issue
-The standard Opus 4.5 configuration is limited to 200,000 tokens, causing failures with larger contexts.
-
-## Solution: Fast Opus Deployment
-
-### Environment Variable Configuration
-
-To use the fast Opus deployment with extended context length, configure Claude Code with:
-
-```bash
-# Set the Opus alias to use the fast deployment
-export ANTHROPIC_DEFAULT_OPUS_MODEL="claude-opus-4-5-20251101-fast"
-```
-
-### Model String Updates for Fast Deployment
-
-| Platform | Fast Opus 4.5 Model String |
-|----------|---------------------------|
-| Anthropic API (1P) | `claude-opus-4-5-20251101-fast` |
-| AWS Bedrock | `anthropic.claude-opus-4-5-20251101-fast-v1:0` |
-| Google Vertex AI | `claude-opus-4-5-fast@20251101` |
-| Azure AI Foundry | `claude-opus-4-5-20251101-fast` |
-
-### Context Length Configuration
-
-The fast deployment supports extended context. Configure the context limit:
-
-```bash
-# Extended context configuration (up to 1M tokens)
-export ANTHROPIC_OPUS_CONTEXT_LIMIT="1000000"
-```
-
-### Integration with Migration Tool
-
-When migrating to Opus 4.5 with extended context requirements:
-
-1. Use the fast model strings above instead of standard ones
-2. Set the environment variable for Opus alias
-3. Configure extended context limit
-4. Test with large contexts (>200k tokens)
-
-### VSCode Configuration
-
-For VSCode extension users:
-
-```json
-{
-  "claude-code.environmentVariables": {
-    "ANTHROPIC_DEFAULT_OPUS_MODEL": "claude-opus-4-5-20251101-fast",
-    "ANTHROPIC_OPUS_CONTEXT_LIMIT": "1000000"
-  }
-}
-```
-
-### Verification
-
-Test the configuration with a prompt that exceeds 200k tokens to ensure the error:
-```
-prompt is too long: 282789 tokens > 200000 maximum
-```
-is resolved.
-
-## When to Use Fast vs Standard
-
-- **Use Fast**: For large codebases, extensive context analysis, long conversations
-- **Use Standard**: For typical development tasks with smaller context requirements
-
-The fast deployment trades some response speed for much higher context capacity.

plugins/claude-opus-4-5-migration/skills/claude-opus-4-5-migration/SKILL.md

@@ -30,8 +30,6 @@ Remove the `context-1m-2025-08-07` beta header if present—it is not yet suppor
 
 ### Target Model Strings (Opus 4.5)
 
-#### Standard Opus 4.5 (200k context limit)
-
 | Platform | Opus 4.5 Model String |
 |----------|----------------------|
 | Anthropic API (1P) | `claude-opus-4-5-20251101` |
@@ -39,24 +37,6 @@ Remove the `context-1m-2025-08-07` beta header if present—it is not yet suppor
 | Google Vertex AI | `claude-opus-4-5@20251101` |
 | Azure AI Foundry | `claude-opus-4-5-20251101` |
 
-#### Fast Opus 4.5 (Extended context)
-
-For applications requiring >200k tokens, use the fast deployment:
-
-| Platform | Fast Opus 4.5 Model String |
-|----------|---------------------------|
-| Anthropic API (1P) | `claude-opus-4-5-20251101-fast` |
-| AWS Bedrock | `anthropic.claude-opus-4-5-20251101-fast-v1:0` |
-| Google Vertex AI | `claude-opus-4-5-fast@20251101` |
-| Azure AI Foundry | `claude-opus-4-5-20251101-fast` |
-
-To configure Claude Code to use the fast deployment, set:
-```bash
-export ANTHROPIC_DEFAULT_OPUS_MODEL="claude-opus-4-5-20251101-fast"
-```
-
-**Note**: See `FAST_MODEL_CONFIG.md` for complete configuration details.
-
 ### Source Model Strings to Replace
 
 | Source Model | Anthropic API (1P) | AWS Bedrock | Google Vertex AI |