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import { readFile } from 'fs/promises';
import { resolve } from 'path';
import { render } from 'ejs';
import { randomUUID } from 'crypto';
import { IListRolesResponse } from
'@gs-squad-mcp/core/mcp/contracts';
import { IStartSquadMembersStatelessPayload } from
'@gs-squad-mcp/core/mcp/contracts';
import { IStartSquadMembersStatelessResponse } from
'@gs-squad-mcp/core/mcp/contracts';
import { IStartSquadMemberOutputBase } from
'@gs-squad-mcp/core/mcp/contracts';
import { IStartSquadMembersStatefulPayload } from
'@gs-squad-mcp/core/mcp/contracts';
import { IStartSquadMembersStatefulResponse } from
'@gs-squad-mcp/core/mcp/contracts';
import { IStartSquadMemberStatefulOutput } from
'@gs-squad-mcp/core/mcp/contracts';
import { RoleRepositoryService } from '@gs-squad-mcp/core/roles';
import { PromptBuilderService } from '@gs-squad-mcp/core/prompt';
import { TemplateRendererService } from '@gs-squad-mcp/core/engine';
import { ProcessRunnerService } from '@gs-squad-mcp/core/engine';
import { SquadConfigService } from '@gs-squad-mcp/core/config';
import { SquadTelemetryService } from '../telemetry/squad-telemetry.service';
@Injectable()
export class SquadService {
constructor(
private readonly roleRepository: RoleRepositoryService,
private readonly promptBuilder: PromptBuilderService,
private readonly templateRenderer: TemplateRendererService,
private readonly processRunner: ProcessRunnerService,
private readonly configService: SquadConfigService,
private readonly telemetry: SquadTelemetryService
) {}
async listRoles(): Promise<IListRolesResponse> {
const roles = await this.roleRepository.getAllRoles();
return {
roles: roles.map((role) => ({
id: role.id,
name: role.name,
description: role.description
}))
};
}
async startSquadMembersStateless(
payload: IStartSquadMembersStatelessPayload
): Promise<IStartSquadMembersStatelessResponse> {
const originatorId = await this.telemetry.ensureSession({
orchestratorChatId: payload.orchestratorChatId,
workspaceId: payload.workspaceId
});
const label = payload.members.map((m) => m.roleId).join(' + ');
const squad = await this.telemetry.createSquad(originatorId, label);
const squadId = squad.squadId;
const config = this.configService.getConfig();
const workspaceRoot = process.cwd();
const requiresSerial = this.requiresSerialExecution(
config.engine,
config.executionMode
);
const members: IStartSquadMemberOutputBase[] = [];
if (requiresSerial) {
for (let index = 0; index < payload.members.length; index += 1) {
const memberInput = payload.members[index];
const memberId = this.generateMemberId(squadId, index);
const result = await this.executeStatelessMember(
memberInput,
memberId,
squadId,
originatorId,
config,
workspaceRoot
);
members.push(result);
// If not last member, delay before next execution
if (
index < payload.members.length - 1 &&
config.sequentialDelayMs > 0
) {
await new Promise((resolve) =>
setTimeout(resolve, config.sequentialDelayMs)
);
}
}
} else {
const parallelResults = await Promise.all(
payload.members.map(async (memberInput, index) => {
const memberId = this.generateMemberId(squadId, index);
const res = await this.executeStatelessMember(
memberInput,
memberId,
squadId,
originatorId,
config,
workspaceRoot
);
return res;
})
);
members.push(...parallelResults);
}
return { squadId, members };
}
async startSquadMembersStateful(
payload: IStartSquadMembersStatefulPayload
): Promise<IStartSquadMembersStatefulResponse> {
const originatorId = await this.telemetry.ensureSession({
orchestratorChatId: payload.orchestratorChatId,
workspaceId: payload.workspaceId
});
const label = payload.members.map((m) => m.roleId).join(' + ');
const squad = await this.telemetry.createSquad(originatorId, label);
const squadId = squad.squadId;
const config = this.configService.getConfig();
const workspaceRoot = process.cwd();
const requiresSerial = this.requiresSerialExecution(
config.engine,
config.executionMode
);
const members: IStartSquadMemberStatefulOutput[] = [];
if (requiresSerial) {
for (let index = 0; index < payload.members.length; index += 1) {
const memberInput = payload.members[index];
const memberId = this.generateMemberId(squadId, index);
const result = await this.executeStatefulMember(
memberInput,
memberId,
squadId,
originatorId,
config,
workspaceRoot
);
members.push(result);
// If not last member, delay before next execution
if (
index < payload.members.length - 1 &&
config.sequentialDelayMs > 0
) {
await new Promise((resolve) =>
setTimeout(resolve, config.sequentialDelayMs)
);
}
}
} else {
const parallelResults = await Promise.all(
payload.members.map(async (memberInput, index) => {
const memberId = this.generateMemberId(squadId, index);
const res = await this.executeStatefulMember(
memberInput,
memberId,
squadId,
originatorId,
config,
workspaceRoot
);
return res;
})
);
members.push(...parallelResults);
}
return { squadId, members };
}
/**
* Escapes a prompt string for safe use in double-quoted shell arguments.
* Escapes special characters and converts newlines to literal \n.
*/
private escapePromptForShell(prompt: string): string {
return prompt
.replace(/\\/g, '\\\\') // Escape backslashes first
.replace(/\$/g, '\\$') // Escape dollar signs
.replace(/`/g, '\\`') // Escape backticks
.replace(/"/g, '\\"') // Escape double quotes
.replace(/\n/g, '\\n') // Convert newlines to literal \n
.replace(/\r/g, ''); // Remove carriage returns
}
private async executeStatelessMember(
memberInput: {
roleId: string;
task: string;
cwd?: string;
},
memberId: string,
squadId: string,
originatorId: string,
config: ReturnType<typeof this.configService.getConfig>,
workspaceRoot: string
): Promise<IStartSquadMemberOutputBase> {
const role = await this.roleRepository.getRoleById(memberInput.roleId);
if (!role) {
throw new Error(`Role not found: ${memberInput.roleId}`);
}
const rawPrompt = this.promptBuilder.buildPromptStateless(
role,
memberInput.task
);
const prompt = this.escapePromptForShell(rawPrompt);
let agentIdForTelemetry: string | null = null;
try {
const agent = await this.telemetry.createAgent(
squadId,
role.name,
memberInput.task,
rawPrompt
);
agentIdForTelemetry = agent.agentId;
} catch {}
const resolvedCwd = memberInput.cwd
? resolve(workspaceRoot, memberInput.cwd)
: workspaceRoot;
const templateContent = await readFile(config.runTemplatePath, 'utf-8');
let renderedCommand: string;
try {
// Render the template to get the full command string
const rendered = render(templateContent, {
prompt,
cwd: resolvedCwd,
roleId: memberInput.roleId,
task: memberInput.task,
chatId: undefined // Not used in stateless mode, but needed for template
});
renderedCommand = rendered.trim();
} catch (error) {
throw new Error(
`Failed to render template ${config.runTemplatePath}: ${
error instanceof Error ? error.message : String(error)
}`
);
}
if (!renderedCommand || renderedCommand.length === 0) {
throw new Error(
`Template ${config.runTemplatePath} rendered to empty command`
);
}
const result = await this.processRunner.runProcess(
renderedCommand,
[],
resolvedCwd,
config.processTimeoutMs
);
// Update telemetry
Eif (agentIdForTelemetry) {
const finishedIso = new Date().toISOString();
const statusNow = this.mapStatus(result.exitCode, result.timedOut);
try {
await this.telemetry.updateAgentStatus(
originatorId,
agentIdForTelemetry,
{
status: statusNow === 'completed' ? 'done' : 'error',
result: result.stdout,
error: result.stderr,
finishedAt: finishedIso
}
);
} catch {}
}
return {
memberId,
roleId: memberInput.roleId,
cwd: memberInput.cwd,
status: this.mapStatus(result.exitCode, result.timedOut),
rawStdout: result.stdout,
rawStderr: result.stderr
};
}
private async executeStatefulMember(
memberInput: {
roleId: string;
task: string;
cwd?: string;
chatId?: string | null;
},
memberId: string,
squadId: string,
originatorId: string,
config: ReturnType<typeof this.configService.getConfig>,
workspaceRoot: string
): Promise<IStartSquadMemberStatefulOutput> {
const role = await this.roleRepository.getRoleById(memberInput.roleId);
if (!role) {
throw new Error(`Role not found: ${memberInput.roleId}`);
}
const resolvedCwd = memberInput.cwd
? resolve(workspaceRoot, memberInput.cwd)
: workspaceRoot;
const hadChatId = !!memberInput.chatId;
let chatId = memberInput.chatId || null;
if (!chatId && config.createChatTemplatePath) {
const createChatTemplate = await readFile(
config.createChatTemplatePath,
'utf-8'
);
let renderedCreateChatCommand: string;
try {
const generatedUuid = randomUUID();
renderedCreateChatCommand = render(createChatTemplate, {
roleId: memberInput.roleId,
cwd: resolvedCwd,
generatedUuid
}).trim();
} catch (error) {
throw new Error(
`Failed to render create-chat template ${
config.createChatTemplatePath
}: ${
error instanceof Error ? error.message : String(error)
}`
);
}
if (
!renderedCreateChatCommand ||
renderedCreateChatCommand.length === 0
) {
throw new Error(
`Create-chat template ${
config.createChatTemplatePath
} rendered to empty command`
);
}
const createChatResult = await this.processRunner.runProcess(
renderedCreateChatCommand,
[],
resolvedCwd,
config.processTimeoutMs
);
if (createChatResult.exitCode !== 0) {
const errorMsg =
createChatResult.stderr || createChatResult.stdout;
throw new Error(`Failed to create chat: ${errorMsg}`);
}
chatId = createChatResult.stdout.trim();
if (!chatId) {
throw new Error('Failed to extract chatId from create-chat output');
}
}
const rawPrompt = hadChatId
? this.promptBuilder.buildPromptStatefulExistingChat(memberInput.task)
: this.promptBuilder.buildPromptStatefulNewChat(role, memberInput.task);
const prompt = this.escapePromptForShell(rawPrompt);
let agentIdForTelemetry: string | null = null;
try {
const agent = await this.telemetry.createAgent(
squadId,
role.name,
memberInput.task,
rawPrompt
);
agentIdForTelemetry = agent.agentId;
} catch {}
const runTemplateContent = await readFile(config.runTemplatePath, 'utf-8');
let renderedRunCommand: string;
try {
// Render the template to get the full command string
renderedRunCommand = render(runTemplateContent, {
prompt,
chatId: chatId || undefined,
cwd: resolvedCwd,
roleId: memberInput.roleId,
task: memberInput.task
}).trim();
} catch (error) {
throw new Error(
`Failed to render template ${config.runTemplatePath}: ${
error instanceof Error ? error.message : String(error)
}`
);
}
if (!renderedRunCommand || renderedRunCommand.length === 0) {
throw new Error(
`Template ${config.runTemplatePath} rendered to empty command`
);
}
const result = await this.processRunner.runProcess(
renderedRunCommand,
[],
resolvedCwd,
config.processTimeoutMs
);
Eif (agentIdForTelemetry) {
const finishedIso = new Date().toISOString();
const statusNow = this.mapStatus(result.exitCode, result.timedOut);
try {
await this.telemetry.updateAgentStatus(
originatorId,
agentIdForTelemetry,
{
status: statusNow === 'completed' ? 'done' : 'error',
result: result.stdout,
error: result.stderr,
finishedAt: finishedIso
}
);
} catch {}
}
return {
memberId,
roleId: memberInput.roleId,
cwd: memberInput.cwd,
chatId: chatId!,
status: this.mapStatus(result.exitCode, result.timedOut),
rawStdout: result.stdout,
rawStderr: result.stderr
};
}
private generateSquadId(): string {
return `squad-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
}
private generateMemberId(squadId: string, index: number): string {
return `${squadId}-m${index}`;
}
private mapStatus(
exitCode: number | null,
timedOut: boolean
): 'completed' | 'error' | 'timeout' {
if (timedOut) {
return 'timeout';
}
if (exitCode === 0) {
return 'completed';
}
return 'error';
}
private requiresSerialExecution(
engine: 'cursor-agent' | 'claude' | 'codex',
executionMode?: 'sequential' | 'parallel'
): boolean {
const envOverride = process.env.PROCESS_RUNNER_SERIALIZE;
if (envOverride === 'true') {
return true;
}
if (envOverride === 'false') {
return false;
}
if (executionMode === 'sequential') {
return true;
}
if (executionMode === 'parallel') {
return false;
}
return engine === 'cursor-agent';
}
}
|