docs: add per-client MCP setup instructions

Expandable sections for Antigravity, Claude Code, generic MCP clients,
and Codex/non-MCP fallback to CLI scripts.

README.md

@@ -37,15 +37,80 @@ Any MCP-compatible agent (Antigravity, Claude Code, etc.) can call these tools n
 
 ### Setup
 
+#### 1. Install dependencies
+
 ```bash
-# Install dependencies
 cd /Users/jasonwalker/Development/Gitea-Tools
+python3 -m venv venv          # skip if venv already exists
 source venv/bin/activate
 pip install "mcp[cli]"
 ```
 
-The server is configured in `mcp_config.json` and runs automatically when Antigravity starts.
+#### 2. Configure your AI client
-Restart Antigravity to load the server after first setup.
+
+The MCP server uses **stdio transport** — each client starts it as a subprocess.
+Add the config below to your client, then restart it.
+
+<details>
+<summary><strong>Antigravity (Google)</strong></summary>
+
+Add to `~/.gemini/antigravity-ide/mcp_config.json` inside `"mcpServers"`:
+
+```json
+"gitea-tools": {
+  "command": "/Users/jasonwalker/Development/Gitea-Tools/venv/bin/python3",
+  "args": ["/Users/jasonwalker/Development/Gitea-Tools/mcp_server.py"],
+  "env": {}
+}
+```
+
+Restart Antigravity to load the server. Tools appear as lazy-loaded MCP tools
+(call via `call_mcp_tool` with `ServerName: "gitea-tools"`).
+</details>
+
+<details>
+<summary><strong>Claude Code (Anthropic)</strong></summary>
+
+Add to `~/.claude.json` (global) or `.mcp.json` in the project root:
+
+```json
+{
+  "mcpServers": {
+    "gitea-tools": {
+      "command": "/Users/jasonwalker/Development/Gitea-Tools/venv/bin/python3",
+      "args": ["/Users/jasonwalker/Development/Gitea-Tools/mcp_server.py"]
+    }
+  }
+}
+```
+
+Restart Claude Code. Tools appear as `mcp__gitea-tools__gitea_create_issue`, etc.
+</details>
+
+<details>
+<summary><strong>Any MCP-compatible client</strong></summary>
+
+The server is a standard MCP stdio server. Point your client at:
+
+- **Command:** `/Users/jasonwalker/Development/Gitea-Tools/venv/bin/python3`
+- **Args:** `["/Users/jasonwalker/Development/Gitea-Tools/mcp_server.py"]`
+- **Transport:** `stdio`
+
+No environment variables needed — auth is handled via macOS keychain.
+</details>
+
+<details>
+<summary><strong>Codex / non-MCP tools</strong></summary>
+
+OpenAI Codex and other tools that don't support MCP can use the CLI scripts
+directly. See the [CLI Scripts](#cli-scripts) section below.
+
+```bash
+# Example: Codex can shell out to the scripts
+python3 /Users/jasonwalker/Development/Gitea-Tools/create_issue.py \
+  --remote prgs --title "Bug report" --body "Details here"
+```
+</details>
 
 ## CLI Scripts