agents >=0.23.0 deprecated `subAgent()`; use `this.dynamicAgents.get()` instead. subAgent(), hasSubAgent(), listSubAgents(), abortSubAgent() and deleteSubAgent() still work, delegate to this.dynamicAgents, and are deprecated in place. Silent: code written for older versions still runs, without an error.

const fs = require("fs");
const path = require("path");
const root = "/w/node_modules/agents";
const pkg = JSON.parse(fs.readFileSync(path.join(root, "package.json"), "utf8"));
function typesWithImports(entry) {
  const exp = pkg.exports[entry];
  if (!exp) return null;
  const file = path.join(root, exp.types);
  let text = fs.readFileSync(file, "utf8");
  for (const m of text.matchAll(/from "(\.\.?\/[^"]+)\.js"/g)) {
    const dep = path.join(path.dirname(file), m[1] + ".d.ts");
    if (fs.existsSync(dep)) text += "\n" + fs.readFileSync(dep, "utf8");
  }
  return text;
}
const types = typesWithImports(".");
const getter = /get dynamicAgents\(\): DynamicAgents;/.test(types);
const start = types.indexOf("declare class DynamicAgents {");
const block = start < 0 ? "" : types.slice(start, types.indexOf("\n}", start));
const missing = ["get<T extends Agent>(", "abort(cls: DynamicAgentClass", "delete(cls: DynamicAgentClass", "has<T extends Agent>(cls: DynamicAgentClass", "list<T extends Agent>("].filter((m) => !block.includes(m));
const deprecated = /@deprecated Use \{@link Agent\.dynamicAgents \| this\.dynamicAgents\.get\(\)\} instead\.\s*\*\/\s*subAgent</.test(types);
if (getter && missing.length === 0 && deprecated) {
  console.log("OK: agents " + pkg.version + " Agent has this.dynamicAgents.{get,abort,delete,has,list}; subAgent() is @deprecated for this.dynamicAgents.get()");
  process.exit(0);
}
const symptom = /\n  subAgent<T extends Agent>\(/.test(types) && !types.includes("dynamicAgents");
if (symptom) {
  console.error("FAIL: agents " + pkg.version + " has no this.dynamicAgents capability; subAgent() is the current API");
  process.exit(1);
}
console.error("ERROR: unexpected Agent types (getter=" + getter + ", missing=" + missing.join(" ") + ", deprecated=" + deprecated + ")");
process.exit(2);

const fs = require("fs");
const path = require("path");
const root = "/w/node_modules/agents";
const pkg = JSON.parse(fs.readFileSync(path.join(root, "package.json"), "utf8"));
function typesWithImports(entry) {
  const exp = pkg.exports[entry];
  if (!exp) return null;
  const file = path.join(root, exp.types);
  let text = fs.readFileSync(file, "utf8");
  for (const m of text.matchAll(/from "(\.\.?\/[^"]+)\.js"/g)) {
    const dep = path.join(path.dirname(file), m[1] + ".d.ts");
    if (fs.existsSync(dep)) text += "\n" + fs.readFileSync(dep, "utf8");
  }
  return text;
}
const types = typesWithImports(".");
const getter = /get dynamicAgents\(\): DynamicAgents;/.test(types);
const start = types.indexOf("declare class DynamicAgents {");
const block = start < 0 ? "" : types.slice(start, types.indexOf("\n}", start));
const missing = ["get<T extends Agent>(", "abort(cls: DynamicAgentClass", "delete(cls: DynamicAgentClass", "has<T extends Agent>(cls: DynamicAgentClass", "list<T extends Agent>("].filter((m) => !block.includes(m));
const deprecated = /@deprecated Use \{@link Agent\.dynamicAgents \| this\.dynamicAgents\.get\(\)\} instead\.\s*\*\/\s*subAgent</.test(types);
if (getter && missing.length === 0 && deprecated) {
  console.log("OK: agents " + pkg.version + " Agent has this.dynamicAgents.{get,abort,delete,has,list}; subAgent() is @deprecated for this.dynamicAgents.get()");
  process.exit(0);
}
const symptom = /\n  subAgent<T extends Agent>\(/.test(types) && !types.includes("dynamicAgents");
if (symptom) {
  console.error("FAIL: agents " + pkg.version + " has no this.dynamicAgents capability; subAgent() is the current API");
  process.exit(1);
}
console.error("ERROR: unexpected Agent types (getter=" + getter + ", missing=" + missing.join(" ") + ", deprecated=" + deprecated + ")");
process.exit(2);