irisandClaude Fable 5.1
9fa09b0af1
A subagent is a second transcript owned by a session, in the same event model, with no process and no controls. The claude translator routes lines carrying parent_tool_use_id to a per-subagent translator and transcript under <session>/subagents/<tool_use_id>; three routes expose the list, a transcript page and the SSE stream. Echo grows /subagent [n] as the rig. On the phone a card with subagents ends in a chevron expander, collapsed by default, opening to outlined subcards styled like dev-updater's components; a subcard opens SessionScreen in read-only form, addressed through TranscriptAddress so paging, cache and stream are shared. Design in SUBAGENTS.md; choices awaiting review in DECISIONS.md. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>