fix(agent): stabilize large tool results

src/runtime/opencode.ts

@@ -7,6 +7,10 @@ import { resolve } from "node:path";
 
 import { config } from "../config.js";
 import { logger } from "../logger.js";
+import {
+  cleanupExpiredToolOutputs,
+  resolveOpencodeToolOutputDirectory,
+} from "./opencodeToolOutputCleanup.js";
 
 const isDevelopmentDebugLoggingEnabled = process.env.NODE_ENV === "development";
 
@@ -46,6 +50,7 @@ const getRuntimeMessageId = (message: RuntimeMessage) => message.info.id;
 export class OpencodeRuntimeAdapter {
   private clientPromise: Promise<OpencodeClient> | null = null;
   private closeServer: (() => void) | null = null;
+  private toolOutputCleanupTimer: ReturnType<typeof setInterval> | null = null;
 
   async ensureClient(): Promise<OpencodeClient> {
     if (!this.clientPromise) {
@@ -380,12 +385,18 @@ export class OpencodeRuntimeAdapter {
   }
 
   async dispose(): Promise<void> {
+    if (this.toolOutputCleanupTimer) {
+      clearInterval(this.toolOutputCleanupTimer);
+      this.toolOutputCleanupTimer = null;
+    }
     this.closeServer?.();
     this.closeServer = null;
     this.clientPromise = null;
   }
 
   private async bootstrapClient(): Promise<OpencodeClient> {
+    await this.cleanupToolOutputs();
+
     // embedded 模式下，把服务内工具桥地址注入到 opencode 进程环境里，
     // 这样 .opencode/tools 下的自定义工具可以回调本服务。
     process.env.TJWATER_AGENT_INTERNAL_BASE_URL = `http://127.0.0.1:${config.PORT}`;
@@ -436,9 +447,39 @@ export class OpencodeRuntimeAdapter {
     this.closeServer = () => {
       runtime.server.close();
     };
+    this.startToolOutputCleanupLoop();
 
     return runtime.client;
   }
+
+  private async cleanupToolOutputs(): Promise<void> {
+    const directory = resolveOpencodeToolOutputDirectory();
+    const ttlMs = config.RESULT_REF_TTL_HOURS * 60 * 60 * 1000;
+    try {
+      const result = await cleanupExpiredToolOutputs(directory, ttlMs);
+      if (result.removed > 0) {
+        logger.info(
+          { directory, ...result },
+          "removed expired opencode tool output files",
+        );
+      }
+    } catch (error) {
+      logger.warn(
+        { err: error, directory },
+        "failed to clean expired opencode tool output files",
+      );
+    }
+  }
+
+  private startToolOutputCleanupLoop(): void {
+    if (this.toolOutputCleanupTimer) {
+      return;
+    }
+    this.toolOutputCleanupTimer = setInterval(() => {
+      void this.cleanupToolOutputs();
+    }, config.RESULT_REF_CLEANUP_INTERVAL_MS);
+    this.toolOutputCleanupTimer.unref();
+  }
 }
 
 export const opencodeRuntime = new OpencodeRuntimeAdapter();
@@ -448,6 +489,10 @@ function buildOpencodeConfig(): Record<string, unknown> {
     deepMerge(readProjectOpencodeConfig(), readEnvOpencodeConfig()),
     {
       model: config.OPENCODE_MODEL,
+      tool_output: {
+        max_bytes: config.MAX_INLINE_RESULT_BYTES,
+        max_lines: 2000,
+      },
     },
   );
 }