The foundations

The first building blocks of SkillHub. Nothing is user-facing yet, but everything above stands on it:

• A strict parser and validator for the agent-skill format, with a corpus of passing and deliberately-malicious fixtures.
• Deterministic, content-hashed packaging — the same skill produces the same bytes and the same sha256 on every machine and OS.
• The version and ref grammar, the semver rules, and the version-diff primitive.
• A single branding seam, so the product name, CLI binary, token prefixes, and config paths all resolve from one place — with a guard that fails any hardcoded brand string.