[Candidate] Truncate coding agent problem_statement (#7862)

* Truncate coding agent problem_statement (#7860)

* truncate

* truncate smarter

* buffer

* imports

* import order

Author: joshspicer

src/github/copilotApi.ts

@@ -19,7 +19,8 @@ import { hasEnterpriseUri } from './utils';
 
 const LEARN_MORE_URL = 'https://aka.ms/coding-agent-docs';
 const PREMIUM_REQUESTS_URL = 'https://docs.github.com/en/copilot/concepts/copilot-billing/understanding-and-managing-requests-in-copilot#what-are-premium-requests';
-
+// https://github.com/github/sweagentd/blob/59e7d9210ca3ebba029918387e525eea73cb1f4a/internal/problemstatement/problemstatement.go#L36-L53
+export const MAX_PROBLEM_STATEMENT_LENGTH = 30_000 - 50; // 50 character buffer
 export interface RemoteAgentJobPayload {
 	problem_statement: string;
 	event_type: string;
@@ -79,10 +80,15 @@ export class CopilotApi {
 		owner: string,
 		name: string,
 		payload: RemoteAgentJobPayload,
+		isTruncated: boolean,
 	): Promise<RemoteAgentJobResponse> {
 		const repoSlug = `${owner}/${name}`;
 		const apiUrl = `/agents/swe/v0/jobs/${repoSlug}`;
 		let status: number | undefined;
+
+		const problemStatementLength = payload.problem_statement.length.toString();
+		const payloadJson = JSON.stringify(payload);
+		const payloadLength = payloadJson.length.toString();
 		Logger.trace(`postRemoteAgentJob: Posting job to ${apiUrl} with payload: ${JSON.stringify(payload)}`, CopilotApi.ID);
 		try {
 			const response = await this.makeApiCall(apiUrl, {
@@ -93,7 +99,7 @@ export class CopilotApi {
 					'Content-Type': 'application/json',
 					'Accept': 'application/json'
 				},
-				body: JSON.stringify(payload)
+				body: payloadJson
 			});
 
 			status = response.status;
@@ -106,21 +112,33 @@ export class CopilotApi {
 			/*
 				__GDPR__
 				"remoteAgent.postRemoteAgentJob" : {
-					"status" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" }
+					"status" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
+					"payloadLength": { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
+					"problemStatementLength": { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
+					"isTruncated": { "classification": "SystemMetaData", "purpose": "FeatureInsight" }
 				}
 			*/
 			this.telemetry.sendTelemetryEvent('remoteAgent.postRemoteAgentJob', {
 				status: status.toString(),
+				payloadLength,
+				problemStatementLength,
+				isTruncated: isTruncated.toString(),
 			});
 			return data;
 		} catch (error) {
 			/* __GDPR__
 				"remoteAgent.postRemoteAgentJob" : {
-					"status" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" }
+					"status" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
+					"payloadLength": { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
+					"problemStatementLength": { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
+					"isTruncated": { "classification": "SystemMetaData", "purpose": "FeatureInsight" }
 				}
 			*/
 			this.telemetry.sendTelemetryErrorEvent('remoteAgent.postRemoteAgentJob', {
 				status: status?.toString() || '999',
+				payloadLength,
+				problemStatementLength,
+				isTruncated: isTruncated.toString(),
 			});
 			throw error;
 		}

src/github/copilotRemoteAgent.ts

@@ -18,7 +18,7 @@ import { CODING_AGENT, CODING_AGENT_AUTO_COMMIT_AND_PUSH } from '../common/setti
 import { ITelemetry } from '../common/telemetry';
 import { toOpenPullRequestWebviewUri } from '../common/uri';
 import { copilotEventToSessionStatus, copilotPRStatusToSessionStatus, IAPISessionLogs, ICopilotRemoteAgentCommandArgs, ICopilotRemoteAgentCommandResponse, OctokitCommon, RemoteAgentResult, RepoInfo } from './common';
-import { ChatSessionFromSummarizedChat, ChatSessionWithPR, CopilotApi, getCopilotApi, RemoteAgentJobPayload, SessionInfo, SessionSetupStep } from './copilotApi';
+import { ChatSessionFromSummarizedChat, ChatSessionWithPR, CopilotApi, getCopilotApi, MAX_PROBLEM_STATEMENT_LENGTH, RemoteAgentJobPayload, SessionInfo, SessionSetupStep } from './copilotApi';
 import { CodingAgentPRAndStatus, CopilotPRWatcher, CopilotStateModel } from './copilotPrWatcher';
 import { ChatSessionContentBuilder } from './copilotRemoteAgent/chatSessionContentBuilder';
 import { GitOperationsManager } from './copilotRemoteAgent/gitOperationsManager';
@@ -572,6 +572,14 @@ export class CopilotRemoteAgentManager extends Disposable {
 			return `${header}\n\n${collapsedContext}`;
 		};
 
+		let isTruncated = false;
+		if (problemContext && (problemContext.length + prompt.length >= MAX_PROBLEM_STATEMENT_LENGTH)) {
+			isTruncated = true;
+			Logger.warn(`Truncating problemContext as it will cause us to exceed maximum problem_statement length (${MAX_PROBLEM_STATEMENT_LENGTH})`, CopilotRemoteAgentManager.ID);
+			const availableLength = MAX_PROBLEM_STATEMENT_LENGTH - prompt.length;
+			problemContext = problemContext.slice(-availableLength);
+		}
+
 		const problemStatement: string = `${prompt}\n${problemContext ?? ''}`;
 		const payload: RemoteAgentJobPayload = {
 			problem_statement: problemStatement,
@@ -586,7 +594,7 @@ export class CopilotRemoteAgentManager extends Disposable {
 		};
 
 		try {
-			const { pull_request, session_id } = await capiClient.postRemoteAgentJob(owner, repo, payload);
+			const { pull_request, session_id } = await capiClient.postRemoteAgentJob(owner, repo, payload, isTruncated);
 			this._onDidCreatePullRequest.fire(pull_request.number);
 			const webviewUri = await toOpenPullRequestWebviewUri({ owner, repo, pullRequestNumber: pull_request.number });
 			const prLlmString = `The remote agent has begun work and has created a pull request. Details about the pull request are being shown to the user. If the user wants to track progress or iterate on the agent's work, they should use the pull request.`;