Initialize repository with harness code and assets

Initial import of all source code, config, and README assets: the
packages workspace (cli, core, server, web, docs, landing, skills),
build scripts, tooling config, and CI workflows.

Includes the data-layout revision made on this branch: the local data
root defaults to ~/.penguin/data (PENGUIN_HOME still overrides; the
installer keeps its binaries in ~/.penguin), and every Agent lives
under <project>/agents/<agent>/ — path helpers, the three
agent-enumeration scans, the system prompt, built-in Skills, tests
and docs all follow the new layout.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018ihk8iQuo3kv2aPjAYEPuR

packages/docs/test/skills-sync.test.ts

@@ -0,0 +1,31 @@
+/**
+ * Docs ↔ skill-library sync: the Skills doc pages must mention every Skill that
+ * actually ships in packages/skills (the library directory is the source of truth —
+ * the same files loadLibrarySkills() reads). Derived, not hardcoded, so adding a
+ * Skill without documenting it fails here instead of silently drifting.
+ */
+import { existsSync, readdirSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+import { describe, expect, it } from "vitest";
+
+const skillsRoot = join(__dirname, "..", "..", "skills", "skills");
+const contentDir = join(__dirname, "..", "content");
+
+const librarySkills = readdirSync(skillsRoot, { withFileTypes: true })
+  .filter((entry) => entry.isDirectory() && existsSync(join(skillsRoot, entry.name, "SKILL.md")))
+  .map((entry) => entry.name)
+  .sort();
+
+describe("docs ↔ skill library sync", () => {
+  it("found the skill library", () => {
+    expect(librarySkills.length).toBeGreaterThan(0);
+  });
+
+  for (const lang of ["zh", "en"] as const) {
+    it(`skills.${lang}.md mentions every library Skill`, () => {
+      const page = readFileSync(join(contentDir, `skills.${lang}.md`), "utf8");
+      const missing = librarySkills.filter((name) => !page.includes(`\`${name}\``));
+      expect(missing, `undocumented skills in skills.${lang}.md`).toEqual([]);
+    });
+  }
+});