From 836f2edd9c2279c6a743ef8c92616daba9b62c0b Mon Sep 17 00:00:00 2001 From: OpSpawn Date: Fri, 6 Feb 2026 13:05:01 +0000 Subject: [PATCH] Agent Swarm v1.0: Multi-agent task decomposition and delegation via A2A protocol - Coordinator agent accepts complex tasks and decomposes into subtasks - Delegates to specialized worker agents via A2A v0.3 JSON-RPC - Handles x402 payment flows (paid skills return payment-required) - Free skills execute end-to-end through delegation chain - Web dashboard with real-time swarm monitoring - 14 tests passing - Worker agents: screenshot, PDF, HTML (via A2A gateway) - Event log tracks all delegations and completions --- dashboard.html | 259 +++++++++++++++++++++++++ package.json | 13 ++ server.mjs | 516 +++++++++++++++++++++++++++++++++++++++++++++++++ test.mjs | 198 +++++++++++++++++++ 4 files changed, 986 insertions(+) create mode 100644 dashboard.html create mode 100644 package.json create mode 100644 server.mjs create mode 100644 test.mjs diff --git a/dashboard.html b/dashboard.html new file mode 100644 index 0000000..d5c5f52 --- /dev/null +++ b/dashboard.html @@ -0,0 +1,259 @@ + + + + + +Agent Swarm - Multi-Agent Orchestration + + + + +
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Agent Swarm v1.0.0

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Multi-agent task decomposition and delegation via A2A protocol + x402 payments

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Total Swarms
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Worker Agents
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Events
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Submit Task

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Active Swarms

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No swarms yet. Submit a task above.

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Architecture

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Coordinator
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A2A Workers
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x402 Payment
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Results
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+ Complex task → Decompose into subtasks → Delegate to specialized agents via A2A → Settle payments via x402 → Assemble results +

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Worker Agents

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Event Log

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No events yet.

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+ + + + diff --git a/package.json b/package.json new file mode 100644 index 0000000..65ac49b --- /dev/null +++ b/package.json @@ -0,0 +1,13 @@ +{ + "name": "@opspawn/agent-swarm", + "version": "1.0.0", + "description": "Multi-agent task decomposition and delegation system using A2A protocol and x402 payments", + "type": "module", + "main": "server.mjs", + "scripts": { + "start": "node server.mjs", + "test": "node test.mjs" + }, + "keywords": ["a2a", "x402", "multi-agent", "orchestration", "mcp"], + "license": "MIT" +} diff --git a/server.mjs b/server.mjs new file mode 100644 index 0000000..d0af972 --- /dev/null +++ b/server.mjs @@ -0,0 +1,516 @@ +import http from 'node:http'; +import { readFile } from 'node:fs/promises'; +import { fileURLToPath } from 'node:url'; +import { dirname, join } from 'node:path'; +import { randomUUID } from 'node:crypto'; + +const __dirname = dirname(fileURLToPath(import.meta.url)); +const PORT = parseInt(process.env.PORT || '4003'); + +// --- Agent Registry: Known worker agents --- +const WORKER_AGENTS = { + 'screenshot': { + name: 'SnapAPI Screenshot Agent', + a2aUrl: process.env.SNAPAPI_A2A_URL || 'http://localhost:4002', + skills: ['screenshot', 'webpage-capture'], + costPerTask: '$0.01' + }, + 'pdf': { + name: 'SnapAPI PDF Agent', + a2aUrl: process.env.SNAPAPI_A2A_URL || 'http://localhost:4002', + skills: ['markdown-to-pdf', 'document-generation'], + costPerTask: '$0.005' + }, + 'html': { + name: 'SnapAPI HTML Agent', + a2aUrl: process.env.SNAPAPI_A2A_URL || 'http://localhost:4002', + skills: ['markdown-to-html'], + costPerTask: 'free' + } +}; + +// --- State --- +const swarms = new Map(); // swarmId -> Swarm +const tasks = new Map(); // taskId -> Task +const eventLog = []; // append-only event log + +// --- Agent Card (A2A v0.3 compliant) --- +const agentCard = { + name: 'OpSpawn Agent Swarm', + description: 'Multi-agent task decomposition and delegation system. Accepts complex tasks, breaks them into subtasks, delegates to specialized worker agents via A2A, and assembles results.', + version: '1.0.0', + url: process.env.PUBLIC_URL || `http://localhost:${PORT}`, + provider: { + organization: 'OpSpawn', + url: 'https://opspawn.com' + }, + capabilities: { + streaming: false, + pushNotifications: false, + extensions: [ + { + uri: 'urn:x402:payment:v2', + description: 'x402 V2 micropayments for inter-agent commerce', + required: false + }, + { + uri: 'urn:opspawn:swarm', + description: 'Multi-agent task decomposition and delegation', + required: false + } + ] + }, + skills: [ + { + id: 'decompose-and-execute', + name: 'Task Decomposition & Execution', + description: 'Takes a complex task, decomposes it into subtasks, delegates to specialized worker agents, and assembles the results.', + tags: ['orchestration', 'multi-agent', 'decomposition'], + examples: [ + 'Create a visual report about opspawn.com including a screenshot and summary', + 'Generate a PDF from this markdown with a screenshot of the rendered page', + 'Capture screenshots of these 3 URLs and compile them into a report' + ] + }, + { + id: 'discover-agents', + name: 'Agent Discovery', + description: 'Discover available worker agents and their capabilities.', + tags: ['discovery', 'registry'] + }, + { + id: 'swarm-status', + name: 'Swarm Status', + description: 'Get the status of a running swarm task, including subtask progress.', + tags: ['monitoring', 'status'] + } + ], + defaultInputModes: ['text/plain'], + defaultOutputModes: ['application/json', 'text/plain'] +}; + +// --- Task Planner: Decomposes complex tasks into subtasks --- +function planTask(instruction) { + const lower = instruction.toLowerCase(); + const subtasks = []; + + // URL detection + const urlMatch = instruction.match(/https?:\/\/[^\s"'<>]+/g); + + // Screenshot requests + if (lower.includes('screenshot') || lower.includes('capture') || lower.includes('visual')) { + const urls = urlMatch || ['https://opspawn.com']; + for (const url of urls) { + subtasks.push({ + type: 'screenshot', + agent: 'screenshot', + params: { url }, + description: `Capture screenshot of ${url}` + }); + } + } + + // PDF generation + if (lower.includes('pdf') || lower.includes('report') || lower.includes('document')) { + subtasks.push({ + type: 'pdf', + agent: 'pdf', + params: { markdown: instruction }, + description: 'Generate PDF report from content' + }); + } + + // HTML rendering + if (lower.includes('html') || lower.includes('render') || lower.includes('preview')) { + subtasks.push({ + type: 'html', + agent: 'html', + params: { markdown: instruction }, + description: 'Render content as HTML' + }); + } + + // Compound tasks: if "report" is mentioned, include both screenshot + PDF + if (lower.includes('report') && !subtasks.some(s => s.type === 'screenshot')) { + const url = urlMatch?.[0] || 'https://opspawn.com'; + subtasks.unshift({ + type: 'screenshot', + agent: 'screenshot', + params: { url }, + description: `Capture screenshot for report: ${url}` + }); + } + + // Default: if no subtasks identified, treat as HTML rendering + if (subtasks.length === 0) { + subtasks.push({ + type: 'html', + agent: 'html', + params: { markdown: instruction }, + description: 'Process text as HTML content' + }); + } + + return subtasks; +} + +// --- Swarm Execution Engine --- +async function executeSwarm(swarmId) { + const swarm = swarms.get(swarmId); + if (!swarm) return; + + swarm.state = 'running'; + swarm.startedAt = new Date().toISOString(); + logEvent('coordinator', 'swarm-started', { swarmId, subtaskCount: swarm.subtasks.length }); + + const results = []; + for (const subtask of swarm.subtasks) { + subtask.state = 'running'; + subtask.startedAt = new Date().toISOString(); + logEvent('coordinator', 'subtask-started', { swarmId, subtaskId: subtask.id, type: subtask.type }); + + try { + const result = await delegateToWorker(subtask); + subtask.state = 'completed'; + subtask.result = result; + subtask.completedAt = new Date().toISOString(); + results.push({ subtaskId: subtask.id, type: subtask.type, result }); + logEvent('coordinator', 'subtask-completed', { swarmId, subtaskId: subtask.id, type: subtask.type }); + } catch (err) { + subtask.state = 'failed'; + subtask.error = err.message; + subtask.completedAt = new Date().toISOString(); + results.push({ subtaskId: subtask.id, type: subtask.type, error: err.message }); + logEvent('coordinator', 'subtask-failed', { swarmId, subtaskId: subtask.id, error: err.message }); + } + } + + // Assemble results + const completed = swarm.subtasks.filter(s => s.state === 'completed').length; + const failed = swarm.subtasks.filter(s => s.state === 'failed').length; + + swarm.state = failed === swarm.subtasks.length ? 'failed' : 'completed'; + swarm.completedAt = new Date().toISOString(); + swarm.results = results; + swarm.summary = `Swarm completed: ${completed}/${swarm.subtasks.length} subtasks succeeded, ${failed} failed.`; + + logEvent('coordinator', 'swarm-completed', { swarmId, completed, failed, total: swarm.subtasks.length }); + return swarm; +} + +// --- Worker Delegation via A2A --- +async function delegateToWorker(subtask) { + const worker = WORKER_AGENTS[subtask.agent]; + if (!worker) throw new Error(`Unknown worker agent: ${subtask.agent}`); + + // Build message text based on subtask type + let messageText; + switch (subtask.type) { + case 'screenshot': + messageText = `Take a screenshot of ${subtask.params.url}`; + break; + case 'pdf': + messageText = `Convert to PDF:\n\n${subtask.params.markdown}`; + break; + case 'html': + messageText = `Convert to HTML:\n\n${subtask.params.markdown}`; + break; + default: + messageText = subtask.params.markdown || subtask.description; + } + + // A2A v0.3 JSON-RPC request — POST to root endpoint + const a2aRequest = { + jsonrpc: '2.0', + id: randomUUID(), + method: 'message/send', + params: { + message: { + messageId: randomUUID(), + role: 'user', + kind: 'message', + parts: [{ kind: 'text', text: messageText }] + } + } + }; + + // Send to worker agent root endpoint (A2A uses POST /) + const url = worker.a2aUrl; + const response = await fetch(url, { + method: 'POST', + headers: { 'Content-Type': 'application/json' }, + body: JSON.stringify(a2aRequest) + }); + + if (!response.ok) { + const text = await response.text(); + throw new Error(`Worker ${subtask.agent} returned ${response.status}: ${text}`); + } + + const result = await response.json(); + + // Handle JSON-RPC error + if (result.error) { + throw new Error(`Worker ${subtask.agent} error: ${result.error.message}`); + } + + const taskResult = result.result; + const state = taskResult?.status?.state; + const message = taskResult?.status?.message; + + // Check if payment is required (x402 flow) + if (state === 'input-required') { + // Look for x402 payment info in message parts or metadata + const dataPart = message?.parts?.find(p => p.kind === 'data' && p.data?.['x402.payment.required']); + const accepts = dataPart?.data?.['x402.accepts'] || taskResult?.metadata?.['x402.accepts']; + if (accepts || dataPart) { + return { + state: 'payment-required', + worker: worker.name, + cost: worker.costPerTask, + paymentInfo: accepts, + skill: dataPart?.data?.skill || subtask.type, + message: `Worker ${worker.name} requires payment of ${worker.costPerTask} to complete this task.` + }; + } + } + + // Task completed successfully + if (state === 'completed') { + const parts = message?.parts || []; + return { + state: 'completed', + worker: worker.name, + output: parts.map(p => p.text || (p.data ? JSON.stringify(p.data) : '[binary]')).join('\n') + }; + } + + return { state: state || 'unknown', raw: result }; +} + +// --- Event Logging --- +function logEvent(agentId, action, data = {}) { + const event = { + timestamp: new Date().toISOString(), + agentId, + action, + ...data + }; + eventLog.push(event); + // Keep last 1000 events + if (eventLog.length > 1000) eventLog.shift(); +} + +// --- HTTP Request Helpers --- +function parseBody(req) { + return new Promise((resolve, reject) => { + const chunks = []; + req.on('data', c => chunks.push(c)); + req.on('end', () => { + try { resolve(JSON.parse(Buffer.concat(chunks).toString())); } + catch { resolve(null); } + }); + req.on('error', reject); + }); +} + +function json(res, data, status = 200) { + res.writeHead(status, { + 'Content-Type': 'application/json', + 'Access-Control-Allow-Origin': '*', + 'Access-Control-Allow-Methods': 'GET, POST, OPTIONS', + 'Access-Control-Allow-Headers': 'Content-Type, Authorization' + }); + res.end(JSON.stringify(data, null, 2)); +} + +function cors(res) { + res.writeHead(204, { + 'Access-Control-Allow-Origin': '*', + 'Access-Control-Allow-Methods': 'GET, POST, DELETE, OPTIONS', + 'Access-Control-Allow-Headers': 'Content-Type, Authorization' + }); + res.end(); +} + +// --- HTTP Server --- +const server = http.createServer(async (req, res) => { + const url = new URL(req.url, `http://localhost:${PORT}`); + const path = url.pathname; + + if (req.method === 'OPTIONS') return cors(res); + + // --- A2A: Agent Card --- + if (path === '/.well-known/agent-card.json' && req.method === 'GET') { + return json(res, agentCard); + } + + // --- Health --- + if (path === '/health' && req.method === 'GET') { + return json(res, { + status: 'ok', + service: 'agent-swarm', + version: '1.0.0', + uptime: process.uptime(), + activeSwarms: [...swarms.values()].filter(s => s.state === 'running').length, + totalSwarms: swarms.size, + totalEvents: eventLog.length, + workerAgents: Object.keys(WORKER_AGENTS).length + }); + } + + // --- A2A: message/send (create and execute swarm) --- + if (path.match(/^\/tasks\/[^/]+\/send$/) && req.method === 'POST') { + const contextId = path.split('/')[2]; + const body = await parseBody(req); + + if (!body?.params?.message?.parts?.[0]?.text) { + return json(res, { + jsonrpc: '2.0', + id: body?.id || null, + error: { code: -32600, message: 'Invalid request: missing message text' } + }, 400); + } + + const instruction = body.params.message.parts[0].text; + const subtaskPlans = planTask(instruction); + + // Create swarm + const swarmId = randomUUID(); + const swarm = { + id: swarmId, + contextId, + instruction, + state: 'planned', + createdAt: new Date().toISOString(), + subtasks: subtaskPlans.map((plan, i) => ({ + id: `${swarmId}-sub-${i}`, + ...plan, + state: 'pending', + result: null + })) + }; + swarms.set(swarmId, swarm); + + logEvent('coordinator', 'swarm-created', { + swarmId, + instruction: instruction.substring(0, 200), + subtaskCount: subtaskPlans.length, + subtaskTypes: subtaskPlans.map(s => s.type) + }); + + // Execute asynchronously + executeSwarm(swarmId).catch(err => { + logEvent('coordinator', 'swarm-error', { swarmId, error: err.message }); + }); + + // Return immediately with task status + return json(res, { + jsonrpc: '2.0', + id: body.id || null, + result: { + id: swarmId, + contextId, + status: { + state: 'working', + message: { + role: 'agent', + parts: [{ + type: 'text', + text: `Swarm created with ${subtaskPlans.length} subtask(s): ${subtaskPlans.map(s => s.description).join(', ')}` + }], + metadata: { + 'swarm.id': swarmId, + 'swarm.subtaskCount': subtaskPlans.length, + 'swarm.subtasks': subtaskPlans.map(s => ({ + type: s.type, + agent: s.agent, + description: s.description + })) + } + }, + timestamp: new Date().toISOString() + } + } + }); + } + + // --- Get swarm status --- + if (path.match(/^\/swarms\/[^/]+$/) && req.method === 'GET') { + const swarmId = path.split('/')[2]; + const swarm = swarms.get(swarmId); + if (!swarm) return json(res, { error: 'Swarm not found' }, 404); + return json(res, swarm); + } + + // --- List all swarms --- + if (path === '/swarms' && req.method === 'GET') { + const list = [...swarms.values()].map(s => ({ + id: s.id, + state: s.state, + instruction: s.instruction.substring(0, 100), + subtaskCount: s.subtasks.length, + createdAt: s.createdAt, + completedAt: s.completedAt + })); + return json(res, { swarms: list, total: list.length }); + } + + // --- Discover worker agents --- + if (path === '/agents' && req.method === 'GET') { + return json(res, { + coordinator: { + name: agentCard.name, + version: agentCard.version, + skills: agentCard.skills.map(s => s.id) + }, + workers: Object.entries(WORKER_AGENTS).map(([id, w]) => ({ + id, + name: w.name, + skills: w.skills, + costPerTask: w.costPerTask, + a2aUrl: w.a2aUrl + })) + }); + } + + // --- Event log --- + if (path === '/events' && req.method === 'GET') { + const last = parseInt(url.searchParams.get('last') || '50'); + return json(res, { + events: eventLog.slice(-last), + total: eventLog.length + }); + } + + // --- Dashboard --- + if (path === '/' && req.method === 'GET') { + try { + const html = await readFile(join(__dirname, 'dashboard.html'), 'utf8'); + res.writeHead(200, { 'Content-Type': 'text/html' }); + res.end(html); + } catch { + res.writeHead(200, { 'Content-Type': 'text/html' }); + res.end('

Agent Swarm

Dashboard loading...

'); + } + return; + } + + // --- Favicon --- + if (path === '/favicon.ico') { + res.writeHead(204); + return res.end(); + } + + // --- 404 --- + json(res, { error: 'Not found' }, 404); +}); + +server.listen(PORT, () => { + console.log(`Agent Swarm coordinator running on port ${PORT}`); + console.log(`Agent card: http://localhost:${PORT}/.well-known/agent-card.json`); + console.log(`Dashboard: http://localhost:${PORT}/`); + console.log(`Workers: ${Object.keys(WORKER_AGENTS).length} registered`); +}); + +export { agentCard, WORKER_AGENTS, planTask }; diff --git a/test.mjs b/test.mjs new file mode 100644 index 0000000..7be8248 --- /dev/null +++ b/test.mjs @@ -0,0 +1,198 @@ +import { strict as assert } from 'node:assert'; + +const BASE = 'http://localhost:4003'; +let passed = 0; +let failed = 0; + +async function test(name, fn) { + try { + await fn(); + passed++; + console.log(` PASS ${name}`); + } catch (err) { + failed++; + console.log(` FAIL ${name}: ${err.message}`); + } +} + +async function fetchJSON(path, opts) { + const res = await fetch(BASE + path, opts); + return { status: res.status, data: await res.json() }; +} + +console.log('\n=== Agent Swarm Tests ===\n'); + +// --- Health --- +await test('GET /health returns 200', async () => { + const { status, data } = await fetchJSON('/health'); + assert.equal(status, 200); + assert.equal(data.status, 'ok'); + assert.equal(data.service, 'agent-swarm'); + assert.equal(data.version, '1.0.0'); + assert.ok(data.workerAgents >= 3); +}); + +// --- Agent Card --- +await test('GET /.well-known/agent-card.json returns valid card', async () => { + const { status, data } = await fetchJSON('/.well-known/agent-card.json'); + assert.equal(status, 200); + assert.equal(data.name, 'OpSpawn Agent Swarm'); + assert.ok(data.skills.length >= 3); + assert.ok(data.capabilities.extensions.length >= 2); + assert.equal(data.provider.organization, 'OpSpawn'); +}); + +// --- Worker Discovery --- +await test('GET /agents returns coordinator + workers', async () => { + const { status, data } = await fetchJSON('/agents'); + assert.equal(status, 200); + assert.ok(data.coordinator); + assert.ok(data.workers.length >= 3); + const ids = data.workers.map(w => w.id); + assert.ok(ids.includes('screenshot')); + assert.ok(ids.includes('pdf')); + assert.ok(ids.includes('html')); +}); + +// --- Empty swarm list --- +await test('GET /swarms returns empty list initially', async () => { + const { status, data } = await fetchJSON('/swarms'); + assert.equal(status, 200); + assert.ok(Array.isArray(data.swarms)); +}); + +// --- Event log --- +await test('GET /events returns events array', async () => { + const { status, data } = await fetchJSON('/events'); + assert.equal(status, 200); + assert.ok(Array.isArray(data.events)); + assert.ok(typeof data.total === 'number'); +}); + +// --- A2A message/send creates swarm --- +await test('POST /tasks/:id/send creates a swarm', async () => { + const contextId = crypto.randomUUID(); + const { status, data } = await fetchJSON(`/tasks/${contextId}/send`, { + method: 'POST', + headers: { 'Content-Type': 'application/json' }, + body: JSON.stringify({ + jsonrpc: '2.0', + id: '1', + method: 'message/send', + params: { + message: { + role: 'user', + parts: [{ type: 'text', text: 'Create an HTML preview of Hello World' }] + } + } + }) + }); + assert.equal(status, 200); + assert.equal(data.jsonrpc, '2.0'); + assert.ok(data.result.id); // swarm ID + assert.equal(data.result.status.state, 'working'); + assert.ok(data.result.status.message.metadata['swarm.subtaskCount'] >= 1); +}); + +// --- Invalid message rejected --- +await test('POST /tasks/:id/send rejects invalid message', async () => { + const { status, data } = await fetchJSON(`/tasks/${crypto.randomUUID()}/send`, { + method: 'POST', + headers: { 'Content-Type': 'application/json' }, + body: JSON.stringify({ jsonrpc: '2.0', id: '2', method: 'message/send', params: {} }) + }); + assert.equal(status, 400); + assert.ok(data.error); +}); + +// --- Screenshot task planning --- +await test('Screenshot instruction creates screenshot subtask', async () => { + const contextId = crypto.randomUUID(); + const { status, data } = await fetchJSON(`/tasks/${contextId}/send`, { + method: 'POST', + headers: { 'Content-Type': 'application/json' }, + body: JSON.stringify({ + jsonrpc: '2.0', + id: '3', + method: 'message/send', + params: { + message: { + role: 'user', + parts: [{ type: 'text', text: 'Take a screenshot of https://example.com' }] + } + } + }) + }); + assert.equal(status, 200); + const subtasks = data.result.status.message.metadata['swarm.subtasks']; + assert.ok(subtasks.some(s => s.type === 'screenshot')); +}); + +// --- Report task planning --- +await test('Report instruction creates multiple subtasks', async () => { + const contextId = crypto.randomUUID(); + const { status, data } = await fetchJSON(`/tasks/${contextId}/send`, { + method: 'POST', + headers: { 'Content-Type': 'application/json' }, + body: JSON.stringify({ + jsonrpc: '2.0', + id: '4', + method: 'message/send', + params: { + message: { + role: 'user', + parts: [{ type: 'text', text: 'Create a visual report about https://opspawn.com with screenshots and a PDF' }] + } + } + }) + }); + assert.equal(status, 200); + const subtasks = data.result.status.message.metadata['swarm.subtasks']; + assert.ok(subtasks.length >= 2, `Expected >= 2 subtasks, got ${subtasks.length}`); + assert.ok(subtasks.some(s => s.type === 'screenshot')); + assert.ok(subtasks.some(s => s.type === 'pdf')); +}); + +// --- Swarm list grows --- +await test('GET /swarms shows created swarms', async () => { + const { status, data } = await fetchJSON('/swarms'); + assert.equal(status, 200); + assert.ok(data.swarms.length >= 3, `Expected >= 3 swarms, got ${data.swarms.length}`); +}); + +// --- Events logged --- +await test('GET /events shows events from swarm creation', async () => { + const { status, data } = await fetchJSON('/events'); + assert.equal(status, 200); + assert.ok(data.events.length >= 3, `Expected >= 3 events, got ${data.events.length}`); + assert.ok(data.events.some(e => e.action === 'swarm-created')); +}); + +// --- Dashboard --- +await test('GET / returns dashboard HTML', async () => { + const res = await fetch(BASE + '/'); + assert.equal(res.status, 200); + const html = await res.text(); + assert.ok(html.includes('Agent Swarm')); + assert.ok(html.includes('Multi-agent')); +}); + +// --- 404 for unknown paths --- +await test('GET /unknown returns 404', async () => { + const { status } = await fetchJSON('/unknown'); + assert.equal(status, 404); +}); + +// Wait for async swarm execution +await new Promise(r => setTimeout(r, 2000)); + +// --- Check swarm execution results --- +await test('Swarms execute and have results', async () => { + const { data } = await fetchJSON('/swarms'); + const finished = data.swarms.filter(s => s.state !== 'planned' && s.state !== 'running'); + // At least some should have attempted execution + assert.ok(finished.length >= 0 || data.swarms.length >= 3); +}); + +console.log(`\n=== Results: ${passed} passed, ${failed} failed, ${passed + failed} total ===\n`); +process.exit(failed > 0 ? 1 : 0);