test: add zero-dep node:test suite + CI (closes #1)

.github/workflows/ci.yml

@@ -0,0 +1,22 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    name: node ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [18, 20, 22]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Zero-dependency test suite
+        run: npm test

README.md

@@ -4,7 +4,7 @@
 
 `SKILL.md → JSON IR → validate 5项 → deliver 单文件HTML`，学 Archify 链路的最小复刻，切更窄的 Agent 调试痛点。
 
-[English](./README_EN.md) · MIT · `node >= 18`
+[English](./README_EN.md) · MIT · `node >= 18` · [![CI](https://github.com/CodeAlex52/agent-loop-trace/actions/workflows/ci.yml/badge.svg)](https://github.com/CodeAlex52/agent-loop-trace/actions/workflows/ci.yml)
 
 ![hero](./docs/assets/hero.svg)
 
@@ -26,6 +26,8 @@ node bin/trace.mjs deliver examples/strands-forcing.json /tmp/loop-trace/demo.ht
 # 用浏览器打开 /tmp/loop-trace/demo.html：T 切主题，E 导出 PNG
 ```
 
+零依赖回归测试：`npm test`（Node 内置 node:test，覆盖 doctor / validate / deliver / 坏样本拒绝）。
+
 在线例子（本地打开）：`examples/rendered/strands.html`、`examples/rendered/dspy.html`
 
 ## Agent Skill 用法

package.json

@@ -6,6 +6,9 @@
   "bin": {
     "trace": "./bin/trace.mjs"
   },
+  "scripts": {
+    "test": "node --test"
+  },
   "engines": {
     "node": ">=18"
   }

test/trace.test.mjs

@@ -0,0 +1,83 @@
+// Zero-dependency smoke + regression suite for agent-loop-trace.
+// Run with: npm test   (Node >= 18, built-in node:test runner)
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { dirname, join, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const ROOT = resolve(dirname(fileURLToPath(import.meta.url)), "..");
+const BIN = join(ROOT, "bin", "trace.mjs");
+const EXAMPLES = ["examples/strands-forcing.json", "examples/dspy-reward.json"];
+
+function run(args) {
+  try {
+    const stdout = execFileSync(process.execPath, [BIN, ...args], {
+      encoding: "utf8",
+      cwd: ROOT,
+    });
+    return { code: 0, stdout };
+  } catch (error) {
+    return { code: error.status ?? 1, stdout: String(error.stdout ?? "") };
+  }
+}
+
+test("doctor reports a ready toolchain", () => {
+  const r = run(["doctor", "--json"]);
+  assert.equal(r.code, 0);
+  const out = JSON.parse(r.stdout);
+  assert.equal(out.ok, true);
+  assert.deepEqual(out.checks, ["schema present", "renderer present", "no deps"]);
+});
+
+for (const example of EXAMPLES) {
+  test(`validate passes for ${example}`, () => {
+    const r = run(["validate", example, "--json"]);
+    assert.equal(r.code, 0);
+    const receipt = JSON.parse(r.stdout);
+    assert.equal(receipt.ok, true);
+    assert.equal(receipt.composition.status, "pass");
+    assert.equal(receipt.composition.summary.errors, 0);
+  });
+
+  test(`deliver renders a self-contained HTML for ${example}`, () => {
+    const out = join(mkdtempSync(join(tmpdir(), "loop-trace-")), "trace.html");
+    const r = run(["deliver", example, out, "--json"]);
+    assert.equal(r.code, 0);
+    const receipt = JSON.parse(r.stdout);
+    assert.equal(receipt.ok, true);
+    assert.match(receipt.artifact.sha256, /^[0-9a-f]{64}$/);
+    const html = readFileSync(out, "utf8");
+    assert.match(html, /<svg id="diagram"/);
+    assert.match(html, /data-theme="dark"/);
+    assert.match(html, /static artifact, no runtime claim/);
+  });
+}
+
+test("validate rejects a spec that breaks a check", () => {
+  const bad = join(mkdtempSync(join(tmpdir(), "loop-trace-bad-")), "bad.json");
+  const spec = JSON.parse(readFileSync(join(ROOT, EXAMPLES[0]), "utf8"));
+  spec.participants = [spec.participants[0]]; // violates the 2..7 participants check
+  writeFileSync(bad, JSON.stringify(spec));
+
+  const r = run(["validate", bad, "--json"]);
+  assert.equal(r.code, 1);
+  const receipt = JSON.parse(r.stdout);
+  assert.equal(receipt.ok, false);
+  assert.ok(receipt.composition.summary.errors > 0);
+});
+
+test("deliver refuses to render an invalid spec", () => {
+  const dir = mkdtempSync(join(tmpdir(), "loop-trace-refuse-"));
+  const bad = join(dir, "bad.json");
+  const spec = JSON.parse(readFileSync(join(ROOT, EXAMPLES[0]), "utf8"));
+  spec.events = spec.events.slice(0, 1); // violates the 2..12 events check
+  writeFileSync(bad, JSON.stringify(spec));
+
+  const r = run(["deliver", bad, join(dir, "out.html"), "--json"]);
+  assert.equal(r.code, 1);
+  const receipt = JSON.parse(r.stdout);
+  assert.equal(receipt.ok, false);
+});