Publish Agent Skills discovery metadata

test/discovery.test.js

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+'use strict';
+
+const assert = require('node:assert/strict');
+const crypto = require('node:crypto');
+const fs = require('node:fs');
+const os = require('node:os');
+const path = require('node:path');
+const { execFileSync } = require('node:child_process');
+const test = require('node:test');
+
+test('builds a valid discovery index matching the published skill', () => {
+  const root = path.resolve(__dirname, '..');
+  const output = fs.mkdtempSync(path.join(os.tmpdir(), 'crypstie-discovery-'));
+
+  try {
+    execFileSync(process.execPath, [path.join(root, 'scripts', 'build-skill-discovery.js'), output]);
+    const skill = fs.readFileSync(path.join(output, 'crypstie', 'SKILL.md'));
+    const index = JSON.parse(fs.readFileSync(path.join(output, 'index.json'), 'utf8'));
+    const expectedDigest = crypto.createHash('sha256').update(skill).digest('hex');
+
+    assert.equal(index.$schema, 'https://schemas.agentskills.io/discovery/0.2.0/schema.json');
+    assert.equal(index.skills.length, 1);
+    assert.equal(index.skills[0].name, 'crypstie');
+    assert.equal(index.skills[0].type, 'skill-md');
+    assert.equal(index.skills[0].url, '/.well-known/agent-skills/crypstie/SKILL.md');
+    assert.equal(index.skills[0].digest, `sha256:${expectedDigest}`);
+    assert.match(fs.readFileSync(path.join(output, 'llms.txt'), 'utf8'), /crypstie on npm/);
+  } finally {
+    fs.rmSync(output, { recursive: true, force: true });
+  }
+});