v0.4.0

What's Changed

• openspec: separate scope from visibility, harden retrieval, isolate the corpus by @ayxuerui in #17
• Fix harness entry file note-scanning and doctor gaps by @ayxuerui in #19
• openspec: archive extract-skill-templates by @ayxuerui in #18
• Generalize the store-shaped residue from identity migration by @ayxuerui in #20

Full Changelog: v0.3.0...v0.4.0