mavis_cron_list

Instructions

Implementation Reference

• src/index.js:32-53 (handler)

  execMavis: The underlying execution function that spawns the 'mavis' CLI binary and returns raw output. Used by runTool to execute all tool commands including mavis_cron_list.

  function execMavis(args, input = '') {
    return new Promise((resolve, reject) => {
      const SESSION_COMMANDS = new Set(['communication', 'session', 'spawn']);
      const sessionId = process.env.__MAVIS_PARENT_SESSION_ID;
      const subcmd = args[0];
      const needsSession = SESSION_COMMANDS.has(subcmd) && sessionId;
      const finalArgs = needsSession ? [...args, '--session', sessionId] : args;
      const proc = spawn(MAVIS_BIN, finalArgs, { stdio: ['pipe', 'pipe', 'pipe'] });
      let stdout = '';
      let stderr = '';
  
      proc.stdout.on('data', d => stdout += d.toString());
      proc.stderr.on('data', d => stderr += d.toString());
      proc.on('close', code => {
        if (code === 0) resolve(stdout.trim());
        else reject(new Error(stderr.split('\n')[0] || `exit code ${code}`));
      });
      proc.on('error', reject);
  
      if (input) proc.stdin.write(input), proc.stdin.end();
    });
  }

• src/index.js:328-330 (schema)

  Input schema for mavis_cron_list: an optional string field 'agentName' with default 'mavis'.

  inputSchema: z.object({
    agentName: z.string().optional().describe('Agent name to list crons for (default: mavis)')
  }),

• src/index.js:325-332 (registration)

  Tool spec registration for 'mavis_cron_list' inside the tools array. Contains name, description, inputSchema, and buildArgs. No execFn is set, so runTool will use execMavisJSON (JSON output path).

  {
    name: 'mavis_cron_list',
    description: 'List all scheduled cron jobs for an agent.',
    inputSchema: z.object({
      agentName: z.string().optional().describe('Agent name to list crons for (default: mavis)')
    }),
    buildArgs: ({ agentName }) => ['cron', 'list', agentName || 'mavis']
  },

• src/index.js:77-92 (handler)

  runTool: The generic tool runner that dispatches execution for all tools including mavis_cron_list. Since mavis_cron_list has no execFn, it uses execMavisJSON (JSON parsing path) and since there's no outputMode set (falsy), it falls through to JSON.stringify.

  function runTool(spec, parsedArgs) {
    const { execFn, outputMode, stdin, buildArgs } = spec;
    const args = buildArgs(parsedArgs);
    const input = typeof stdin === 'function' ? stdin(parsedArgs) : stdin;
  
    const execPromise = execFn
      ? execMavis(args, input || '')
      : execMavisJSON(args);
  
    return execPromise.then(result => {
      const text = outputMode === OUTPUT_RAW
        ? (result || '')
        : JSON.stringify(result, null, 2);
      return [{ type: 'text', text }];
    });
  }

• src/index.js:484-492 (registration)

  MavisServer registers tools via ListToolsRequestSchema and handles tool calls via CallToolRequestSchema. The toolMap is built from the tools array which includes mavis_cron_list.

  this.toolMap = new Map(tools.map(t => [t.name, t]));
  
  this.server.setRequestHandler(ListToolsRequestSchema, async () => ({
    tools: tools.map(t => ({
      name: t.name,
      description: t.description,
      inputSchema: normalizeObjectSchema(t.inputSchema),
    })),
  }));