Upgrade CLI to v0.2.0: add validate, list commands, --version, --dry-run, --backup flags

- Fix npm test glob pattern for Node >= 21 compatibility
- Add --version/-v flag to display package version
- Add validate command: run 78 profile checks (files, skills, frontmatter, legacy patterns, AGENTS mapping)
- Add list command: display all 13 bundled skills with descriptions
- Add --dry-run/-n flag for init: preview files without copying
- Add --backup/-b flag for init --force: backup existing .agent before overwrite
- Add name field to workflow frontmatter (brainstorm, execute-plan, write-plan)
- Expand smoke check to cover all 13 skills and new command files
- Increase test coverage from 3 to 20 tests (cli, init, validate)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/commands/list.js

@@ -0,0 +1,79 @@
+import { readdir, readFile } from "node:fs/promises";
+import { fileURLToPath } from "node:url";
+import { join } from "node:path";
+
+function getSkillsDir() {
+  return fileURLToPath(new URL("../../templates/.agent/skills", import.meta.url));
+}
+
+function parseFrontmatter(content) {
+  const match = content.match(/^---\n([\s\S]*?)\n---/);
+  if (!match) return {};
+
+  const fm = {};
+  const lines = match[1].split("\n");
+  let currentKey = null;
+  let currentValue = "";
+
+  for (const line of lines) {
+    const keyMatch = line.match(/^(\w+):\s*(.*)$/);
+    if (keyMatch) {
+      if (currentKey) {
+        fm[currentKey] = currentValue.trim();
+      }
+      currentKey = keyMatch[1];
+      currentValue = keyMatch[2].replace(/^["']|["']$/g, "");
+    } else if (currentKey) {
+      currentValue += " " + line.trim();
+    }
+  }
+  if (currentKey) {
+    fm[currentKey] = currentValue.trim();
+  }
+
+  return fm;
+}
+
+export async function listCommand({ stdout, stderr }) {
+  const skillsDir = getSkillsDir();
+
+  let entries;
+  try {
+    entries = await readdir(skillsDir, { withFileTypes: true });
+  } catch {
+    stderr.write("Could not read bundled skills directory.\n");
+    return 1;
+  }
+
+  const skills = [];
+  for (const entry of entries) {
+    if (!entry.isDirectory()) continue;
+
+    const skillFile = join(skillsDir, entry.name, "SKILL.md");
+    try {
+      const content = await readFile(skillFile, "utf8");
+      const fm = parseFrontmatter(content);
+      skills.push({
+        name: fm.name || entry.name,
+        description: fm.description || "(no description)",
+      });
+    } catch {
+      skills.push({ name: entry.name, description: "(SKILL.md not found)" });
+    }
+  }
+
+  skills.sort((a, b) => a.name.localeCompare(b.name));
+
+  stdout.write(`Antigravity Superpowers — ${skills.length} skills available:\n\n`);
+
+  const maxName = Math.max(...skills.map((s) => s.name.length));
+  for (const skill of skills) {
+    const desc = skill.description.length > 80
+      ? skill.description.slice(0, 77) + "..."
+      : skill.description;
+    stdout.write(`  ${skill.name.padEnd(maxName + 2)} ${desc}\n`);
+  }
+
+  stdout.write("\n");
+  return 0;
+}