Compatibility: If AskUserQuestion is unavailable, present options as a numbered list and wait for the user's reply. If Task is unavailable, run parallel steps sequentially. The context: fork and agent: frontmatter fields are Claude Code-specific — on OpenCode and VS Code Copilot they are ignored and the skill runs inline using the current model.

Update an EM plan or task milestone file. Two input modes:

Annotations: > and >> markers already written in plan files
Conversational: plain-language description of what to change

Annotation syntax

> instruction — standalone line, applies to the block immediately below it:

> rewrite this phase for the new auth approach
### Phase 2 - Authentication Migration

em:update

Annotation syntax