n8n
Version:
n8n Workflow Automation Tool
164 lines • 8.01 kB
JavaScript
;
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.AgentsBuilderService = void 0;
const agents_1 = require("@n8n/agents");
const backend_common_1 = require("@n8n/backend-common");
const di_1 = require("@n8n/di");
const n8n_workflow_1 = require("n8n-workflow");
const agents_service_1 = require("../agents.service");
const agent_config_composition_1 = require("../json-config/agent-config-composition");
const n8n_checkpoint_storage_1 = require("../integrations/n8n-checkpoint-storage");
const n8n_memory_1 = require("../integrations/n8n-memory");
const agent_checkpoint_repository_1 = require("../repositories/agent-checkpoint.repository");
const agents_builder_prompts_1 = require("./agents-builder-prompts");
const agents_builder_tools_service_1 = require("./agents-builder-tools.service");
const builder_tool_names_1 = require("./builder-tool-names");
const not_found_error_1 = require("../../../errors/response-errors/not-found.error");
const agents_builder_settings_service_1 = require("./agents-builder-settings.service");
const builder_telemetry_1 = require("../tracing/builder-telemetry");
const BUILDER_MODEL = 'anthropic/claude-sonnet-4-5';
function builderThreadId(agentId) {
return `${builder_tool_names_1.AGENT_THREAD_PREFIX.BUILDER}${agentId}`;
}
let AgentsBuilderService = class AgentsBuilderService {
constructor(logger, agentsService, agentsBuilderToolsService, n8nMemory, builderSettings, n8nCheckpointStorage, agentCheckpointRepository) {
this.logger = logger;
this.agentsService = agentsService;
this.agentsBuilderToolsService = agentsBuilderToolsService;
this.n8nMemory = n8nMemory;
this.builderSettings = builderSettings;
this.n8nCheckpointStorage = n8nCheckpointStorage;
this.agentCheckpointRepository = agentCheckpointRepository;
}
async getBuilderMessages(agentId) {
const threadId = builderThreadId(agentId);
return await this.n8nMemory.getMessages(threadId);
}
async clearBuilderMessages(agentId) {
const threadId = builderThreadId(agentId);
await this.n8nMemory.deleteMessagesByThread(threadId);
await this.n8nMemory.deleteThread(threadId);
}
async *buildAgent(agentId, projectId, message, credentialProvider, user) {
const builder = await this.createBuilderAgent(agentId, projectId, credentialProvider, user);
this.logger.debug('Starting builder agent stream', { agentId, projectId });
const resourceId = user.id;
const resultStream = await builder.stream(message, {
persistence: { threadId: builderThreadId(agentId), resourceId },
});
yield* this.streamFromAgent(resultStream);
}
async *resumeBuild(agentId, projectId, runId, toolCallId, resumeData, credentialProvider, user) {
const checkpointStatus = await this.n8nCheckpointStorage.getStatus(runId);
if (checkpointStatus.status === 'expired') {
throw new n8n_workflow_1.UserError(`Builder checkpoint ${runId} has expired and cannot be resumed`);
}
if (checkpointStatus.status === 'not-found') {
throw new n8n_workflow_1.UserError(`Builder checkpoint ${runId} not found`);
}
const builder = await this.createBuilderAgent(agentId, projectId, credentialProvider, user);
this.logger.debug('Resuming builder agent', { agentId, runId, toolCallId });
const resultStream = await builder.resume('stream', resumeData, {
runId,
toolCallId,
});
yield* this.streamFromAgent(resultStream);
}
async createBuilderAgent(agentId, projectId, credentialProvider, user) {
const agent = await this.agentsService.findById(agentId, projectId);
if (!agent) {
throw new not_found_error_1.NotFoundError(`Agent "${agentId}" not found`);
}
const { config: modelConfig } = await this.builderSettings.resolveModelConfig(user);
const currentConfig = (0, agent_config_composition_1.composeJsonConfig)(agent);
const currentToolsMap = agent.tools ?? {};
const toolList = Object.entries(currentToolsMap)
.map(([id, t]) => `- ${id}: ${t.descriptor.name} -- ${t.descriptor.description}`)
.join('\n') || '(none)';
const configJson = currentConfig ? JSON.stringify(currentConfig, null, 2) : '(no config yet)';
const instructions = (0, agents_builder_prompts_1.buildBuilderPrompt)({
configJson,
configHash: (0, agents_builder_tools_service_1.getAgentConfigHash)(currentConfig),
configUpdatedAt: agent.updatedAt.toISOString(),
toolList,
builderModel: BUILDER_MODEL,
});
const tools = this.agentsBuilderToolsService.getTools(agentId, projectId, credentialProvider, user);
const builderMemory = new agents_1.Memory().storage(this.n8nMemory).lastMessages(40);
const builder = new agents_1.Agent('agent-builder')
.model(modelConfig)
.instructions(instructions)
.memory(builderMemory)
.checkpoint(this.n8nCheckpointStorage.getStorage(agentId));
const telemetry = (0, builder_telemetry_1.buildBuilderTelemetry)({
agentId,
projectId,
userId: user.id,
threadId: builderThreadId(agentId),
model: modelConfig,
});
if (telemetry)
builder.telemetry(telemetry);
for (const tool of [...tools.json, ...tools.shared]) {
builder.tool(tool);
}
return builder;
}
async *streamFromAgent(resultStream) {
const reader = resultStream.stream.getReader();
try {
while (true) {
const { done, value } = await reader.read();
if (done)
break;
yield value;
}
}
finally {
reader.releaseLock();
}
}
async findOpenCheckpoint(agentId) {
const rows = await this.agentCheckpointRepository.find({
where: { agentId, expired: false },
order: { updatedAt: 'DESC' },
take: 5,
});
for (const row of rows) {
if (!row.state)
continue;
let parsed;
try {
parsed = (0, n8n_workflow_1.jsonParse)(row.state);
}
catch {
continue;
}
if (parsed.status === 'suspended') {
return parsed;
}
}
return null;
}
};
exports.AgentsBuilderService = AgentsBuilderService;
exports.AgentsBuilderService = AgentsBuilderService = __decorate([
(0, di_1.Service)(),
__metadata("design:paramtypes", [backend_common_1.Logger,
agents_service_1.AgentsService,
agents_builder_tools_service_1.AgentsBuilderToolsService,
n8n_memory_1.N8nMemory,
agents_builder_settings_service_1.AgentsBuilderSettingsService,
n8n_checkpoint_storage_1.N8NCheckpointStorage,
agent_checkpoint_repository_1.AgentCheckpointRepository])
], AgentsBuilderService);
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