fix: make wired brain CLI invocation explicit

[LinkinStars]

Summary

• state the portable bundled Node CLI invocation directly in wired agent blocks
• replace the ambiguous brain init suggestion with the direct invocation
• add regression coverage for AGENTS.md and make the missing-CLI hook test portable on macOS

Verification

• npm test
• fresh-project validation with brain absent from PATH: generated AGENTS.md provides the direct invocation, and node <brain-page-skill-dir>/bin/brain.mjs list-pages and init succeed

Fixes #20

[Copilot]

Pull request overview

Makes wired agent guidance explicitly invoke the bundled Node CLI without relying on brain being on PATH.

Changes:

• Adds explicit CLI and initialization commands to generated agent blocks.
• Adds regression assertions for AGENTS.md.
• Makes the missing-CLI hook test portable across macOS and Linux.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
skills/brain-page/bin/brain.mjs	Emits explicit bundled CLI commands.
skills/brain-page/test/cli-init-wire.test.mjs	Verifies generated invocation guidance.
skills/brain-page/test/cli-hooks.test.mjs	Includes /bin in the test PATH.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.