API - CODEX AGENTS: setup packet for local Codex

docs/MCP_TOOLS_CONTRACT.md

@@ -336,6 +336,19 @@ tasker_raw_api_request
 
 `tasker_get_agent_instructions` should include the effective card guide. The local Codex setup file should instruct the agent to call this tool before planning Tasker changes.
 
+Agent Gateway also exposes:
+
+```text
+GET /api/v1/agent-session/setup
+```
+
+This endpoint is authenticated by the same bearer token and returns:
+
+- MCP server config template with `<agent-token>` placeholder;
+- tools available to the current agent grants;
+- generated AGENTS.md content with NODE.DC Tasker operating rules;
+- no raw token echo.
+
 Minimum instruction:
 
 ```text