What
Agents can now receive the full parent conversation context when spawned as sub-agents, enabling better awareness of what the user has been working on.
Details
- New
forkContextfrontmatter field for agent.mddefinitions (set totrueorfalse) - When enabled, the sub-agent receives prior conversation messages as read-only context
- Agents with
forkContext: truemust usemodel: inheritto avoid context length mismatch - A new
### FORKING CONVERSATION CONTEXT ###boundary marker is injected to clearly separate inherited context from the sub-agent's own task - The sub-agent is instructed to only use tools available in its own system prompt, even if context messages reference other tools
Evidence
Sub-agent entry system (search for "sub_agent_entered" and "FORKING CONVERSATION CONTEXT")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.