v0.11.0

• Add a reusable skill-admin capability — run_skill_admin installs, uninstalls, and reports status of a spore's embedded Agent Skill across Codex, Claude Code, and opencode — available in all four languages (Rust, Go, Python, TypeScript) with byte-identical generated SKILL.md and output.
• Return a structured, typed report from skill-admin (Rust code-tagged enum, Go sealed-interface structs, Python dataclass with to_dict(), TypeScript discriminated union) so callers read fields directly or serialize it, rather than an opaque map/dict/value.
• Report a per-target 'current' freshness flag so a stale installed skill is detected and a re-run of install refreshes it.
• Guard installs and uninstalls with a managed-marker check that refuses to overwrite or remove a skill the tool did not generate unless --force is passed.