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Codesys-MCP/vscode_codesys_companion/README.md

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# CODESYS MCP Companion Extension
VS Code/Cursor companion extension for the CODESYS MCP bridge.
This extension provides command workflows, project/actions/jobs views, status bar state, and diagnostics for the existing Python MCP bridge located at:
- `python_scripting/mcp_codesys_bridge/server.py`
## Features
- MCP bridge lifecycle and health check
- Project-level commands:
- create project
- stage existing project
- read project inventory
- read device I/O
- write POU
- write I/O mapping
- manage device
- sync project
- build project
- download to device
- Job polling UX through Jobs view
- Error diagnostics surfaced in Problems panel
- ST language support:
- syntax grammar
- snippets
- context menu action for current ST file sync
## Settings
All settings are under the `codesys.*` namespace:
- `codesys.pythonPath`
- `codesys.bridgeScriptPath`
- `codesys.agentUrl`
- `codesys.agentToken`
- `codesys.requestTimeoutSec`
- `codesys.pollIntervalMs`
- `codesys.defaultProjectPath`
- `codesys.defaultDryRunMutations`
- `codesys.allowDownloadCommand`
## Local Development
Prerequisites:
- Node.js 20+
- npm 10+
- Python 3 available for bridge startup
Install and build:
```bash
cd vscode_codesys_companion
npm install
npm run check
```
Run extension in Extension Development Host:
1. Open `vscode_codesys_companion` in VS Code/Cursor.
2. Press `F5`.
3. Use command palette commands with prefix `CODESYS:`.
## Packaging
Build VSIX package:
```bash
cd vscode_codesys_companion
npm install
npm run compile
npm run package
```
## Operational Notes
- Keep mutating operations in dry-run mode first.
- `download_to_device` command is gated by `codesys.allowDownloadCommand`.
- Bridge auth requires `codesys.agentToken` to match VM agent token.
- Align operations with:
- `python_scripting/how-to-use-codesys-mcp.md`
- `python_scripting/codesys-mcp-bridge-operations.md`