Advertise embedded context prompt support (#160)

Author: benbrandt

src/CodexAcpServer.ts

@@ -112,6 +112,7 @@ export class CodexAcpServer implements acp.Agent {
                 },
                 loadSession: true,
                 promptCapabilities: {
+                    embeddedContext: true,
                     image: true
                 },
                 sessionCapabilities: {

src/__tests__/CodexACPAgent/initialize.test.ts

@@ -43,6 +43,7 @@ describe('CodexACPAgent - initialize', () => {
                 },
                 loadSession: true,
                 promptCapabilities: {
+                    embeddedContext: true,
                     image: true
                 },
                 sessionCapabilities: {