The MCP create_agent tool inherited the parent agent's mode regardless of
provider, so a Claude parent in bypassPermissions spawning an opencode
child would feed an invalid mode to opencode and the new agent would die
in error state. The fix:
- Add an optional mode field to the agent-to-agent input schema.
- Validate any explicit mode against the target provider's available
modes; throw with the list when invalid.
- Inherit the caller's mode only when both sides use the same provider;
otherwise refuse with a helpful error listing the target's modes.
Mohamed Boudra
f11aea3223