W-20269100: save traces to file

package.json

@@ -9,7 +9,7 @@
     "@inquirer/prompts": "^7.10.1",
     "@oclif/core": "^4",
     "@oclif/multi-stage-output": "^0.8.29",
-    "@salesforce/agents": "^0.19.8",
+    "@salesforce/agents": "^0.20.0",
     "@salesforce/core": "^8.23.7",
     "@salesforce/kit": "^3.2.3",
     "@salesforce/sf-plugins-core": "^12.2.6",

src/commands/agent/preview.ts

@@ -18,7 +18,7 @@ import * as path from 'node:path';
 import { join, resolve } from 'node:path';
 import { globSync } from 'glob';
 import { Flags, SfCommand } from '@salesforce/sf-plugins-core';
-import { AuthInfo, Connection, Lifecycle, Messages, SfError } from '@salesforce/core';
+import { AuthInfo, Connection, Lifecycle, Logger, Messages, SfError } from '@salesforce/core';
 import React from 'react';
 import { render } from 'ink';
 import {
@@ -35,6 +35,14 @@ import { AgentPreviewReact } from '../../components/agent-preview-react.js';
 Messages.importMessagesDirectoryFromMetaUrl(import.meta.url);
 const messages = Messages.loadMessages('@salesforce/plugin-agent', 'agent.preview');
 
+let logger: Logger;
+const getLogger = (): Logger => {
+  if (!logger) {
+    logger = Logger.childFromRoot('plugin-agent-preview');
+  }
+  return logger;
+};
+
 type BotVersionStatus = { Status: 'Active' | 'Inactive' };
 
 export type AgentData = {
@@ -195,6 +203,7 @@ export default class AgentPreview extends SfCommand<AgentPreviewResult> {
         outputDir,
         isLocalAgent: selectedAgent.source === AgentSource.SCRIPT,
         apexDebug: flags['apex-debug'],
+        logger: getLogger(),
       }),
       { exitOnCtrlC: false }
     );

src/components/agent-preview-react.tsx

@@ -21,9 +21,10 @@ import { resolve } from 'node:path';
 import React from 'react';
 import { Box, Text, useInput } from 'ink';
 import TextInput from 'ink-text-input';
-import { Connection, SfError, Lifecycle } from '@salesforce/core';
+import { Connection, SfError, Lifecycle, Logger } from '@salesforce/core';
 import { AgentPreviewBase, AgentPreviewSendResponse, writeDebugLog } from '@salesforce/agents';
 import { sleep, env } from '@salesforce/kit';
+import { PlannerResponse } from '@salesforce/agents/lib/types.js';
 
 // Component to show a simple typing animation
 function Typing(): React.ReactNode {
@@ -52,7 +53,8 @@ function Typing(): React.ReactNode {
 export const saveTranscriptsToFile = (
   outputDir: string,
   messages: Array<{ timestamp: Date; role: string; content: string }>,
-  responses: AgentPreviewSendResponse[]
+  responses: AgentPreviewSendResponse[],
+  traces?: PlannerResponse[]
 ): void => {
   if (!outputDir) return;
   fs.mkdirSync(outputDir, { recursive: true });
@@ -62,6 +64,29 @@ export const saveTranscriptsToFile = (
 
   const responsesPath = path.join(outputDir, 'responses.json');
   fs.writeFileSync(responsesPath, JSON.stringify(responses, null, 2));
+
+  if (traces) {
+    const tracesPath = path.join(outputDir, 'traces.json');
+    fs.writeFileSync(tracesPath, JSON.stringify(traces, null, 2));
+  }
+};
+
+export const getTraces = async (
+  agent: AgentPreviewBase,
+  sessionId: string,
+  messageIds: string[],
+  logger: Logger
+): Promise<PlannerResponse[]> => {
+  if (messageIds.length > 0) {
+    try {
+      const traces = await agent.traces(sessionId, messageIds);
+      return traces;
+    } catch (e) {
+      const sfError = SfError.wrap(e);
+      logger.info(`Error obtaining traces: ${sfError.name} - ${sfError.message}`, { sessionId, messageIds });
+    }
+  }
+  return [];
 };
 
 /**
@@ -78,6 +103,7 @@ export function AgentPreviewReact(props: {
   readonly outputDir: string | undefined;
   readonly isLocalAgent: boolean;
   readonly apexDebug: boolean | undefined;
+  readonly logger: Logger;
 }): React.ReactNode {
   const [messages, setMessages] = React.useState<Array<{ timestamp: Date; role: string; content: string }>>([]);
   const [header, setHeader] = React.useState('Starting session...');
@@ -96,8 +122,9 @@ export function AgentPreviewReact(props: {
   const [tempDir, setTempDir] = React.useState('');
   const [responses, setResponses] = React.useState<AgentPreviewSendResponse[]>([]);
   const [apexDebugLogs, setApexDebugLogs] = React.useState<string[]>([]);
+  const [messageIds, setMessageIds] = React.useState<string[]>([]);
 
-  const { connection, agent, name, outputDir, isLocalAgent, apexDebug } = props;
+  const { connection, agent, name, outputDir, isLocalAgent, apexDebug, logger } = props;
 
   useInput((input, key) => {
     // If user is in directory input and presses ESC, cancel and exit without saving
@@ -222,7 +249,9 @@ export function AgentPreviewReact(props: {
         const sessionDir = path.join(finalDir, `${dateForDir}--${sessionId || 'session'}`);
         fs.mkdirSync(sessionDir, { recursive: true });
 
-        saveTranscriptsToFile(sessionDir, messages, responses);
+        const traces = await getTraces(agent, sessionId, messageIds, logger);
+
+        saveTranscriptsToFile(sessionDir, messages, responses, traces);
 
         // Write apex debug logs if any
         if (apexDebug) {
@@ -246,7 +275,7 @@ export function AgentPreviewReact(props: {
       }
     };
     void saveAndExit();
-  }, [saveConfirmed, saveDir, messages, responses, sessionId, apexDebug, connection]);
+  }, [saveConfirmed, saveDir, messages, responses, sessionId, apexDebug, connection, agent, messageIds, logger]);
 
   return (
     <Box flexDirection="column">
@@ -395,6 +424,7 @@ export function AgentPreviewReact(props: {
 
                 // Add the agent's response to the chat
                 setMessages((prev) => [...prev, { role: name, content: message, timestamp: new Date() }]);
+                setMessageIds((prev) => [...prev, response.messages[0].planId]);
 
                 // Apex debug logs will be saved when user exits and chooses to save
               } catch (e) {
@@ -422,6 +452,7 @@ export function AgentPreviewReact(props: {
           <Text bold>Session Ended</Text>
           {tempDir ? <Text>Conversation log: {tempDir}/transcript.json</Text> : null}
           {tempDir ? <Text>API transactions: {tempDir}/responses.json</Text> : null}
+          {tempDir ? <Text>Traces: {tempDir}/traces.json</Text> : null}
           {apexDebugLogs.length > 0 && tempDir && <Text>Apex Debug Logs saved to: {tempDir}</Text>}
         </Box>
       ) : null}

test/components/agent-preview-react.test.ts

@@ -19,8 +19,13 @@ import * as os from 'node:os';
 import * as path from 'node:path';
 import { describe, it, beforeEach, afterEach } from 'mocha';
 import { expect } from 'chai';
+import sinon, { SinonStubbedInstance } from 'sinon';
 import type { AgentPreviewSendResponse } from '@salesforce/agents';
-import { saveTranscriptsToFile } from '../../src/components/agent-preview-react.js';
+import { PlannerResponse } from '@salesforce/agents/lib/types.js';
+import type { Logger } from '@salesforce/core';
+import type { AgentPreviewBase } from '@salesforce/agents';
+import { saveTranscriptsToFile, getTraces } from '../../src/components/agent-preview-react.js';
+import { trace1, trace2 } from '../testData.js';
 
 describe('AgentPreviewReact saveTranscriptsToFile', () => {
   let testDir: string;
@@ -139,4 +144,76 @@ describe('AgentPreviewReact saveTranscriptsToFile', () => {
     // Should parse as valid JSON
     expect(() => JSON.parse(content) as unknown).to.not.throw();
   });
+
+  it('should write traces.json when traces are provided', () => {
+    const outputDir = path.join(testDir, 'output');
+    const messages: Array<{ timestamp: Date; role: string; content: string }> = [];
+    const responses: AgentPreviewSendResponse[] = [];
+    const traces: PlannerResponse[] = [trace1, trace2];
+
+    saveTranscriptsToFile(outputDir, messages, responses, traces);
+
+    const tracesPath = path.join(outputDir, 'traces.json');
+    expect(fs.existsSync(tracesPath)).to.be.true;
+
+    const content = JSON.parse(fs.readFileSync(tracesPath, 'utf8')) as PlannerResponse[];
+    expect(content).to.have.lengthOf(2);
+  });
+});
+
+describe('AgentPreviewReact getTraces', () => {
+  let mockAgent: SinonStubbedInstance<AgentPreviewBase>;
+  let mockLogger: SinonStubbedInstance<Logger>;
+  const sessionId = 'session-123';
+  const messageIds = ['msg-1', 'msg-2'];
+
+  beforeEach(() => {
+    mockAgent = {
+      traces: sinon.stub(),
+    } as SinonStubbedInstance<AgentPreviewBase>;
+
+    mockLogger = {
+      info: sinon.stub(),
+    } as SinonStubbedInstance<Logger>;
+  });
+
+  afterEach(() => {
+    sinon.restore();
+  });
+
+  it('should return traces when agent.traces succeeds', async () => {
+    const expectedTraces: PlannerResponse[] = [trace1];
+
+    mockAgent.traces.resolves(expectedTraces);
+
+    const result = await getTraces(mockAgent, sessionId, messageIds, mockLogger);
+
+    expect(result).to.deep.equal(expectedTraces);
+    expect(mockAgent.traces.calledWith(sessionId, messageIds)).to.be.true;
+    expect(mockLogger.info.called).to.be.false;
+  });
+
+  it('should return empty array when agent.traces throws an error', async () => {
+    const error = new Error('Failed to get traces');
+    mockAgent.traces.rejects(error);
+
+    const result = await getTraces(mockAgent, sessionId, messageIds, mockLogger);
+
+    expect(result).to.deep.equal([]);
+    expect(mockAgent.traces.calledWith(sessionId, messageIds)).to.be.true;
+    expect(
+      mockLogger.info.calledWith('Error obtaining traces: Error - Failed to get traces', { sessionId, messageIds })
+    ).to.be.true;
+  });
+
+  it('should handle empty messageIds array', async () => {
+    const expectedTraces: PlannerResponse[] = [];
+    mockAgent.traces.resolves(expectedTraces);
+
+    const result = await getTraces(mockAgent, sessionId, [], mockLogger);
+
+    expect(result).to.deep.equal(expectedTraces);
+    expect(mockAgent.traces.notCalled).to.be.true;
+    expect(mockLogger.info.called).to.be.false;
+  });
 });

test/testData.ts

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2025, Salesforce, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { PlannerResponse } from '@salesforce/agents/lib/types.js';
+
+export const trace1: PlannerResponse = {
+  type: 'PlanSuccessResponse',
+  planId: 'plan-1',
+  sessionId: 'session-123',
+  intent: 'get_weather',
+  topic: 'weather',
+  plan: [
+    {
+      type: 'FunctionStep',
+      function: {
+        name: 'get_weather',
+        input: { location: 'Madrid' },
+        output: { temperature: 25, condition: 'sunny' },
+      },
+      executionLatency: 100,
+      startExecutionTime: Date.now(),
+      endExecutionTime: Date.now() + 100,
+    },
+  ],
+};
+
+export const trace2: PlannerResponse = {
+  type: 'PlanSuccessResponse',
+  planId: 'plan-4',
+  sessionId: 'session-456',
+  intent: 'send_message',
+  topic: 'communication',
+  plan: [
+    {
+      type: 'PlannerResponseStep',
+      message: 'Hello world',
+      responseType: 'text',
+      isContentSafe: true,
+      safetyScore: {
+        // eslint-disable-next-line camelcase
+        safety_score: 0.9,
+        // eslint-disable-next-line camelcase
+        category_scores: {
+          toxicity: 0.1,
+          hate: 0.0,
+          identity: 0.0,
+          violence: 0.0,
+          physical: 0.0,
+          sexual: 0.0,
+          profanity: 0.0,
+          biased: 0.0,
+        },
+      },
+    },
+  ],
+};

yarn.lock

@@ -1595,10 +1595,10 @@
   resolved "https://registry.yarnpkg.com/@rtsao/scc/-/scc-1.1.0.tgz#927dd2fae9bc3361403ac2c7a00c32ddce9ad7e8"
   integrity sha512-zt6OdqaDoOnJ1ZYsCYGt9YmWzDXl4vQdKTyJev62gFhRGKdx7mcT54V9KIjg+d2wi9EXsPvAPKe7i7WjfVWB8g==
 
-"@salesforce/agents@^0.19.8":
-  version "0.19.8"
-  resolved "https://registry.yarnpkg.com/@salesforce/agents/-/agents-0.19.8.tgz#430089ccd3d87d32f2a88e79ccb9afd522b9b4cb"
-  integrity sha512-aAfaSDevqQrUAFyQgG7FiyltGKG6+ApxpkymTWB2pbQY2SXV7BnNRyO8TwkSS0XAa09HxYW84paOi/Xg3J/9Vw==
+"@salesforce/agents@^0.20.0":
+  version "0.20.0"
+  resolved "https://registry.yarnpkg.com/@salesforce/agents/-/agents-0.20.0.tgz#e4539fb88ee695675890a9942d03cfee189e9db1"
+  integrity sha512-YiiMEGBuExt1/z5RO2I+rK9X7kn3wkxmAES84L1ELU5OOM1QjvVKj7MqaA+fb8AKugUO43fcAKeJGemdp9/+xw==
   dependencies:
     "@salesforce/core" "^8.23.5"
     "@salesforce/kit" "^3.2.4"