SKILL.md frontmatter can now declare `runtime: [claude-code]` or
`runtime: [hermes, claude-code]` to opt out of incompatible adapters
instead of failing at first invocation. Default `["*"]` means universal —
existing skill libraries need zero migration.
Borrowed from hermes' declarative skill-compat pattern surfaced in the
hermes architecture survey. The remaining two patterns (event-log
layer, observability config block) stay open under #119.
Wiring:
- SkillMetadata.runtime: list[str] = ["*"]
- _normalize_runtime_field accepts list, string-sugar, missing -> ["*"];
malformed warns and falls back to universal so a typo never silently
drops a skill.
- load_skills(..., current_runtime=...) filters out skills whose runtime
list lacks "*" or current_runtime, with an INFO log line.
- BaseAdapter.start passes type(self).name() so the live adapter drives
the filter; SkillsWatcher takes the same kwarg so hot-reload honors it.
8 new tests cover default universal, no-field universal, explicit
match/mismatch, string sugar, wildcard short-circuit, current_runtime=None
(preserves old behavior), and malformed-warns-not-drops.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
