Platform-specific skill variants

[devrimcavusoglu]

Context

Some skills may need platform-specific instructions. For example, Claude Code uses the Read tool while Codex uses cat. Currently there's no way to express this within a single skill definition.

Proposed Changes

• Support variant bodies per platform in a single skill directory
• Possible approaches: platform-specific markdown sections, or separate body files (e.g., SKILL.claude-code.md)
• Install command selects the appropriate variant for the target platform
• Falls back to the default body if no variant exists

References

Analysis item 2.11