Configure TypeScript and Python language servers in Serena container (#809)

Serena container's `.serena/project.yml` only configured Go, causing
TypeScript and Python language server analysis to return empty results.

## Changes

- **Initialization script**: Added `/usr/local/bin/serena-init.sh` that
auto-generates `.serena/project.yml` with all three languages on
container startup
- **ENTRYPOINT**: Changed from direct `serena-mcp-server` execution to
wrapper script
- **Idempotent logic**: Script checks for each language individually
with anchored patterns (`^- go$`, `^- typescript$`, `^- python$`) and
only recreates config when any language is missing

```bash
#!/bin/bash
set -e
mkdir -p /workspace/.serena

if [ ! -f /workspace/.serena/project.yml ] || \
   ! grep -q "^- go$" /workspace/.serena/project.yml || \
   ! grep -q "^- typescript$" /workspace/.serena/project.yml || \
   ! grep -q "^- python$" /workspace/.serena/project.yml; then
  printf "languages:\n- go\n- typescript\n- python\n" > /workspace/.serena/project.yml
fi

exec serena-mcp-server "$@"
```

Language servers (gopls, typescript-language-server, pyright) were
already installed but not configured for project-level analysis.

<!-- START COPILOT ORIGINAL PROMPT -->



<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>[language-support] TypeScript and Python language servers
not configured in Serena project</issue_title>
> <issue_description>## Summary
> 
> The language-support-tester workflow declares support for Go,
TypeScript, and Python in the workflow configuration, but the Serena MCP
server project is only configured with Go language support. This
prevents TypeScript and Python code analysis from working.
> 
> ## Test Results
> 
> ### ✅ Go Language Support: **WORKING**
> - Successfully found symbols using `find_symbol`
> - Successfully analyzed Go files using `get_symbols_overview`
> - Successfully found references using `find_referencing_symbols`
> - Tested with: `main.go`, `version.go`, `main_test.go`
> 
> ### ❌ TypeScript/JavaScript Language Support: **NOT WORKING**
> - Created test TypeScript file with classes, interfaces, and functions
> - `find_symbol` returned empty results `[]`
> - `get_symbols_overview` returned empty object `{}`
> - Language server not analyzing TypeScript/JavaScript files
> 
> ### ❌ Python Language Support: **NOT WORKING**
> - Created test Python file with classes and functions
> - `find_symbol` returned empty results `[]`
> - `get_symbols_overview` returned empty object `{}`
> - Language server not analyzing Python files
> 
> ## Root Cause
> 
> The `.serena/project.yml` configuration file only includes Go:
> 
> ``````yaml
> languages:
> - go
> ``````
> 
> However, the workflow configuration at
`.github/workflows/language-support-tester.md` declares:
> 
> ``````yaml
> tools:
>   serena: ["go", "typescript", "python"]
> ``````
> 
> ## Expected Behavior
> 
> The Serena project configuration should include all three languages:
> 
> ``````yaml
> languages:
> - go
> - typescript
> - python
> ``````
> 
> ## Additional Issues
> 
> The test sample directories referenced in the task specification do
not exist:
> - Missing: `/workspace/test/serena-mcp-tests/samples/js_project/`
> - Missing: `/workspace/test/serena-mcp-tests/samples/python_project/`
> 
> These directories should be created with representative test files for
proper integration testing.
> 
> ## Steps to Reproduce
> 
> 1. Run the language-support-tester workflow
> 2. Attempt to analyze TypeScript or Python files using Serena tools
> 3. Observe that symbol finding and analysis return empty results
> 
> ## Recommended Actions
> 
> 1. Update `.serena/project.yml` to include TypeScript and Python in
the `languages` list
> 2. Create test sample directories with representative TypeScript and
Python code
> 3. Re-run the language support tests to verify all three languages
work correctly
> 
> 
> 
> 
> > AI generated by [Language Support
Tester](https://github.com/github/gh-aw-mcpg/actions/runs/21778809095)
> > - [x] expires <!-- gh-aw-expires: 2026-02-14T10:47:32.483Z --> on
Feb 14, 2026, 10:47 AM UTC
> 
> <!-- gh-aw-agentic-workflow: Language Support Tester, engine: copilot,
run: https://github.com/github/gh-aw-mcpg/actions/runs/21778809095 -->
> 
> <!-- gh-aw-workflow-id: language-support-tester
--></issue_description>
> 
> <agent_instructions>Fix the serena Dockerfile</agent_instructions>
> 
> ## Comments on the Issue (you are @copilot in this section)
> 
> <comments>
> </comments>
> 


</details>


> **Custom agent used: agentic-workflows**
> GitHub Agentic Workflows (gh-aw) - Create, debug, and upgrade
AI-powered workflows with intelligent prompt routing



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- Fixes #801

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---

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Author: lpcox

containers/serena-mcp-server/BUILD_NOTES.md

@@ -10,6 +10,18 @@ The Serena MCP server container Dockerfile has been created with support for:
 
 ## Recent Fixes
 
+### Multi-Language Configuration Script (2026-02-07)
+Added automatic project configuration for TypeScript and Python language servers:
+- **Problem**: The `.serena/project.yml` configuration only included Go, causing TypeScript and Python language server analysis to fail
+- **Solution**: Created initialization script (`serena-init.sh`) that automatically generates/updates `.serena/project.yml` with all three languages (Go, TypeScript, Python) on container startup
+- **Impact**: TypeScript and Python code analysis now works out-of-the-box without manual project configuration
+- **Implementation**: 
+  - Script checks if `project.yml` exists and contains all three required languages (Go, TypeScript, Python)
+  - Automatically creates/updates configuration only when any language is missing
+  - Uses anchored grep patterns for precise language detection
+  - Runs via ENTRYPOINT before starting the Serena MCP server
+- **Testing**: Container successfully creates `.serena/project.yml` when mounting any workspace to `/workspace`
+
 ### Go Runtime Re-added (2026-02-05)
 Re-added Go runtime to the container to support Go code analysis:
 - **Problem**: The Dockerfile only installed `gopls` (Go LSP) but not the Go runtime itself

containers/serena-mcp-server/Dockerfile

@@ -53,6 +53,28 @@ RUN mkdir -p /workspace /tmp/serena-cache /root/.serena
 ENV SERENA_WORKSPACE=/workspace
 ENV SERENA_CACHE_DIR=/tmp/serena-cache
 
+# Create a startup script that ensures multi-language support
+# This script will initialize the workspace with Go, TypeScript, and Python if not already configured
+RUN printf '#!/bin/bash\n\
+set -e\n\
+\n\
+# Ensure .serena directory exists in workspace\n\
+mkdir -p /workspace/.serena\n\
+\n\
+# Check if project.yml needs to be created or updated\n\
+# Create/update if: file does not exist, OR it is missing any of the three required languages\n\
+if [ ! -f /workspace/.serena/project.yml ] || \\\n\
+   ! grep -q "^- go$" /workspace/.serena/project.yml || \\\n\
+   ! grep -q "^- typescript$" /workspace/.serena/project.yml || \\\n\
+   ! grep -q "^- python$" /workspace/.serena/project.yml; then\n\
+  echo "Initializing Serena project with Go, TypeScript, and Python support..."\n\
+  printf "languages:\\n- go\\n- typescript\\n- python\\n" > /workspace/.serena/project.yml\n\
+fi\n\
+\n\
+# Start the Serena MCP server\n\
+exec serena-mcp-server "$@"\n\
+' > /usr/local/bin/serena-init.sh && chmod +x /usr/local/bin/serena-init.sh
+
 # Create a dummy project to pre-warm Serena's LSP cache
 # Focus on Python, Go, and TypeScript for codex context
 RUN mkdir -p /tmp/dummy-project && \
@@ -72,7 +94,7 @@ RUN rm -rf /tmp/dummy-project
 # Expose the workspace directory as a volume mount point
 VOLUME ["/workspace"]
 
-# Set default entrypoint to run Serena MCP server
-ENTRYPOINT ["serena-mcp-server"]
+# Set default entrypoint to run initialization script
+ENTRYPOINT ["/usr/local/bin/serena-init.sh"]
 
 CMD []