mcp-source

# Switch MCP for Unity Package Source You are switching the `com.coplaydev.unity-mcp` package source in one or more Unity projects. ## allowed-tools Bash, Read, Edit, ReadMcpResourceTool, ListMcpResourcesTool ## Instructions ### 1. Parse arguments The user's argument is: `$ARGUMENTS` Valid values: `main`, `beta`, `branch`, `local`, or empty. If empty or not one of the four valid values, ask the user to choose: - **main** — upstream main branch (stable releases) - **beta** — upstream beta branch (pre-release) - **branch** — your current remote branch (for testing a PR) - **local** — local file reference to your checkout (for live dev iteration) ### 2. Detect repo context Run these git commands from the current working directory to find the unity-mcp repo: ```bash git rev-parse --show-toplevel # → repo_root git rev-parse --abbrev-ref HEAD # → branch_name git remote get-url origin # → origin_url ``` Convert SSH origins to HTTPS: if `origin_url` starts with `git@github.com:`, transform it to `https://github.com/{owner}/{repo}.git`. ### 3. Discover target Unity projects Try two approaches to find `Packages/manifest.json` files to update: **Approach A — MCP resources (preferred):** Read `mcpforunity://project/info` for each connected Unity instance (use `ListMcpResourcesTool` to find available instances). Extract `projectRoot` and use `{projectRoot}/Packages/manifest.json`. **Approach B — filesystem fallback:** If no MCP instances are connected, search upward from the current working directory for `Packages/manifest.json` files using Bash: ```bash find "$(pwd)" -maxdepth 3 -name "manifest.json" -path "*/Packages/manifest.json" 2>/dev/null ``` If multiple manifests are found, update all of them (confirming with the user first). ### 4. Build the package URL Based on the user's selection, construct the dependency value: | Selection | URL | |-----------|-----| | `main` | `https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#main` | | `beta` | `https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#beta` | | `branch` | `{origin_https}?path=/MCPForUnity#{branch_name}` | | `local` | `file:{repo_root}/MCPForUnity` | For `branch`: use the HTTPS-normalized origin URL and current git branch name. For `local`: use the absolute path to the repo root with `file:` prefix (no `//`), e.g. `file:/Users/davidsarno/unity-mcp/MCPForUnity`. ### 5. Update each manifest For each discovered `manifest.json`: 1. Read the file with the Read tool 2. Find the `"com.coplaydev.unity-mcp"` dependency line 3. Use the Edit tool to replace the old value with the new URL 4. Report what was changed: old value → new value, file path ### 6. Report results After updating, tell the user: - Which manifests were updated - The old and new package source values - Remind them: "Unity will re-resolve the package automatically. If it doesn't, open Package Manager and click Refresh."