Merge pull request #214 from multica-ai/codex/chat-context-window-indicator

feat(chat): add context window usage indicator

packages/core/src/agent/async-agent.ts

@@ -553,6 +553,20 @@ export class AsyncAgent {
     return this.agent.getProviderInfo();
   }
 
+  /**
+   * Get persisted session metadata.
+   */
+  getSessionMeta(): import("./session/types.js").SessionMeta | undefined {
+    return this.agent.getSessionMeta();
+  }
+
+  /**
+   * Get effective context window token limit for this session.
+   */
+  getContextWindowTokens(): number {
+    return this.agent.getContextWindowTokens();
+  }
+
   /**
    * Switch to a different provider and/or model.
    * This updates the agent's model without recreating the session.

packages/core/src/agent/runner.ts

@@ -15,6 +15,7 @@ import {
   getDefaultModel,
 } from "./providers/index.js";
 import { SessionManager } from "./session/session-manager.js";
+import type { SessionMeta } from "./session/types.js";
 import { ProfileManager } from "./profile/index.js";
 import { SkillManager } from "./skills/index.js";
 import { credentialManager, getCredentialsPath } from "./credentials.js";
@@ -1199,6 +1200,20 @@ export class Agent {
     };
   }
 
+  /**
+   * Get persisted session metadata.
+   */
+  getSessionMeta(): SessionMeta | undefined {
+    return this.session.getMeta();
+  }
+
+  /**
+   * Get effective context window token limit for this session.
+   */
+  getContextWindowTokens(): number {
+    return this.session.getMeta()?.contextWindowTokens ?? this.session.getContextWindowTokens();
+  }
+
   /**
    * Switch to a different provider and/or model.
    * This updates the agent's model without recreating the session.

packages/core/src/hub/rpc/handlers/get-agent-messages.ts

@@ -31,6 +31,7 @@ export function createGetAgentMessagesHandler(): RpcHandler {
     const session = new SessionManager({ sessionId: agentId });
     const allMessages = session.loadMessagesForDisplay();
     const total = allMessages.length;
+    const contextWindowTokens = session.getMeta()?.contextWindowTokens ?? session.getContextWindowTokens();
 
     // When offset is not provided, return the latest messages
     if (offset == null) {
@@ -39,6 +40,6 @@ export function createGetAgentMessagesHandler(): RpcHandler {
 
     const sliced = allMessages.slice(offset, offset + limit);
 
-    return { messages: sliced, total, offset, limit };
+    return { messages: sliced, total, offset, limit, contextWindowTokens };
   };
 }