Add Codex MCP agent provider

packages/server/src/server/agent/agent-sdk-types.ts

@@ -1,6 +1,6 @@
 import type { Options as ClaudeAgentOptions } from "@anthropic-ai/claude-agent-sdk";
 
-export type AgentProvider = "codex" | "claude";
+export type AgentProvider = "codex" | "codex-mcp" | "claude";
 
 export type AgentMode = {
   id: string;

packages/server/src/server/agent/model-catalog.ts

@@ -26,7 +26,7 @@ export async function fetchProviderModelCatalog(
   if (provider === "claude") {
     return fetchClaudeModelCatalog(options);
   }
-  if (provider === "codex") {
+  if (provider === "codex" || provider === "codex-mcp") {
     return fetchCodexModelCatalog();
   }
   throw new Error(`Unsupported provider '${provider}'`);

packages/server/src/server/agent/provider-manifest.ts

@@ -68,6 +68,14 @@ export const AGENT_PROVIDER_DEFINITIONS: AgentProviderDefinition[] = [
     defaultModeId: "auto",
     modes: CODEX_MODES,
   },
+  {
+    id: "codex-mcp",
+    label: "Codex MCP",
+    description:
+      "Codex workspace agent via MCP with streaming events and permission elicitation",
+    defaultModeId: "auto",
+    modes: CODEX_MODES,
+  },
 ];
 
 export function getAgentProviderDefinition(provider: AgentProvider): AgentProviderDefinition {

plan.md

@@ -12,13 +12,14 @@ Build a new Codex MCP provider side‑by‑side with the existing Codex SDK prov
   - Ensure it fails before implementation.
   - **Done (2025-12-24 17:57)**: Expanded Codex MCP e2e tests to cover basic response, permissions allow/deny, and abort flow; updated typings and helpers.
 
-- [ ] **Implement**: `codex-mcp-agent.ts` provider so tests pass.
+- [x] **Implement**: `codex-mcp-agent.ts` provider so tests pass.
 
   - MCP stdio client + session lifecycle.
   - `codex` / `codex-reply` calls.
   - `codex/event` mapping to AgentStreamEvent.
   - Elicitation → permission requests + responses.
   - Abort/close handling.
+  - **Done (2025-12-24 18:12)**: Added Codex MCP provider with stdio client, event mapping, permissions, persistence, and abort handling.
 
 - [ ] **Test (E2E)**: Run tests and add follow-up tasks based on results.