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// module-agent-registry.js — VFS-backed agent directory with A2A contracts
// Commands: agent-list, agent-register, agent-unregister, agent-status, contract-register, contract-list
class AgentRegistryModule {
constructor() {
this.commands = {};
this.terminal = null;
this._contracts = {};
}
registerCommands() {
this.commands['agent-list'] = () => this.listAgents();
this.commands['agent-status'] = (args) => this.showAgentStatus(args[0]);
this.commands['agent-register'] = (args) => this.registerAgent(args);
this.commands['agent-unregister'] = (args) => this.unregisterAgent(args[0]);
this.commands['contract-register'] = (args) => this.registerContract(args);
this.commands['contract-list'] = () => this.listContracts();
}
init(terminal) {
this.terminal = terminal;
if (!this.terminal.fs.readDir('/agents/')) this.terminal.fs.mkdir('agents');
if (!this.terminal.fs.readDir('/.contracts/')) this.terminal.fs.mkdir('.contracts');
this._loadContracts();
this.terminal.print('📋 Agent Registry loaded', 'info');
}
_loadContracts() {
try {
const data = this.terminal.fs.readFile('/.contracts/index.json');
if (data) this._contracts = JSON.parse(data);
} catch (e) {}
// Try loading individual contract files
const dir = this.terminal.fs.readDir('/.contracts/');
if (dir) {
dir.forEach(e => {
if (e.type === 'file' && e.name.endsWith('.contract.json')) {
try {
const c = JSON.parse(this.terminal.fs.readFile('/.contracts/' + e.name));
this._contracts[c.role] = c;
} catch (e) { console.warn('Bad contract:', e.name, e.message); }
}
});
}
}
_saveContracts() {
try {
this.terminal.fs.fsWriteJSON('/.contracts/index.json', this._contracts);
} catch (e) { console.error('Contract save error:', e); }
}
registerAgent(args) {
const id = args[1] || `agent-${Date.now()}`;
const capabilities = args.slice(2).length ? args.slice(2) : ['list_files', 'read_file'];
const agentDir = `agents/${id}`;
if (!this.terminal.fs.readDir('/' + agentDir + '/')) this.terminal.fs.mkdir(agentDir);
this.terminal.fs.writeFile(`${agentDir}/status.json`, JSON.stringify({
id,
status: 'idle',
capabilities,
registered: new Date().toISOString(),
lastHeartbeat: new Date().toISOString(),
contract: null
}));
this.terminal.print(`✅ Agent '${id}' registered with ${capabilities.length} capabilities`, 'success');
}
registerContract(args) {
const role = args[0];
if (!role) return this.terminal.print('Usage: contract-register <role> [input_fields...] [--output output_fields...]', 'warning');
const inputIdx = args.indexOf('--output');
const hasOutputFlag = inputIdx !== -1;
let inputFields = [], outputFields = [];
if (hasOutputFlag) {
inputFields = args.slice(1, inputIdx).filter(f => !f.startsWith('--'));
outputFields = args.slice(inputIdx + 1).filter(f => !f.startsWith('--'));
} else {
inputFields = args.slice(1).filter(f => !f.startsWith('--'));
outputFields = ['result']; // default output
}
const contract = {
role,
capabilities: inputFields,
input_schema: inputFields,
output_schema: outputFields,
created: new Date().toISOString(),
updated: new Date().toISOString()
};
this._contracts[role] = contract;
// Save as individual contract file
this.terminal.fs.fsWriteJSON(`/.contracts/${role}.contract.json`, contract);
this._saveContracts();
this.terminal.print(`✅ Contract registered for role '${role}'`, 'success');
this.terminal.print(` Input fields: ${inputFields.join(', ') || '(free-form)'}`, 'info');
this.terminal.print(` Output fields: ${outputFields.join(', ') || '(free-form)'}`, 'info');
}
listContracts() {
const roles = Object.keys(this._contracts);
if (roles.length === 0) return this.terminal.print('No contracts registered', 'info');
this.terminal.print(`📜 A2A Contracts (${roles.length}):`, 'header');
roles.forEach(r => {
const c = this._contracts[r];
this.terminal.print(` ${r} — input:[${c.input_schema.join(',')}] → output:[${c.output_schema.join(',')}]`, 'info');
});
}
validateTask(role, task) {
const contract = this._contracts[role];
if (!contract) return { valid: true, reason: 'no contract for role' }; // permissive fallback
if (contract.input_schema.length === 0) return { valid: true, reason: 'free-form input' };
// Simple validation: check required input fields are present in task
const missing = contract.input_schema.filter(f => !task.toLowerCase().includes(f.toLowerCase()));
if (missing.length > 0) {
return { valid: false, reason: `missing required fields: ${missing.join(', ')}` };
}
return { valid: true, reason: 'matched' };
}
getContract(role) {
return this._contracts[role] || null;
}
listAgents() {
const agents = this.terminal.fs.ls('/agents/');
if (!agents || agents.length === 0) {
return this.terminal.print('No agents registered', 'info');
}
this.terminal.print(`📋 Registered Agents (${agents.length}):`, 'header');
agents.forEach(a => {
if (a.type === 'dir' && a.name !== 'configured') {
const data = this.terminal.fs.readFile(`/agents/${a.name}/status.json`);
const s = data ? JSON.parse(data) : { status: 'unknown', capabilities: [] };
this.terminal.print(` ${a.name} — ${s.status} (${(s.capabilities || []).length} capabilities)${s.contract ? ` → contract:${s.contract}` : ''}`, 'info');
}
});
}
unregisterAgent(id) {
const ok = this.terminal.fs.deleteFile('agents/' + id);
if (ok) this.terminal.print(`✅ Agent '${id}' unregistered`, 'success');
else this.terminal.print(`❌ Agent '${id}' not found`, 'error');
}
showAgentStatus(id) {
if (!id) return this.terminal.print('Usage: agent-status <agent-id>', 'error');
const data = this.terminal.fs.readFile(`/agents/${id}/status.json`);
if (!data) return this.terminal.print(`❌ Agent '${id}' not found`, 'error');
const s = JSON.parse(data);
this.terminal.print(`Agent: ${s.id}`, 'header');
this.terminal.print(` Status: ${s.status}`, 'info');
this.terminal.print(` Capabilities: ${(s.capabilities || []).join(', ')}`, 'info');
this.terminal.print(` Contract: ${s.contract || 'none'}`, 'info');
this.terminal.print(` Registered: ${s.registered}`, 'info');
this.terminal.print(` Last Heartbeat: ${s.lastHeartbeat}`, 'info');
}
getAgent(id) {
const data = this.terminal.fs.readFile(`/agents/${id}/status.json`);
return data ? JSON.parse(data) : null;
}
updateHeartbeat(id) {
const agent = this.getAgent(id);
if (!agent) return false;
agent.lastHeartbeat = new Date().toISOString();
this.terminal.fs.writeFile(`agents/${id}/status.json`, JSON.stringify(agent));
return true;
}
}
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