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feat(agent): wire delegate tool registration for multi-agent setups

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Register the delegate tool in registerSharedTools when multiple agents
are configured. Gated independently from the subagent tool — delegate
uses SubTurn directly and does not depend on SubagentManager.

Self-delegation is prevented by injecting the current agent ID.
Permission is enforced via CanSpawnSubagent (reuses allow_agents config).

Single-agent setups are unaffected: the tool is not registered when
only one agent exists in the registry.

Ref: #2148
This commit is contained in:
xiaoen 2026-04-15 21:29:29 +08:00
parent 0ff78fa53f
commit 039f35563e
1 changed files with 14 additions and 0 deletions
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14
pkg/agent/loop.go
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@ -440,6 +440,20 @@ func registerSharedTools(
} else if (spawnEnabled || spawnStatusEnabled) && !cfg.Tools.IsToolEnabled("subagent") {
logger.WarnCF("agent", "spawn/spawn_status tools require subagent to be enabled", nil)
}
// Register delegate tool for multi-agent setups.
// Delegation uses the SubTurn mechanism directly (not SubagentManager),
// so it does not depend on the subagent tool being enabled.
if cfg.Tools.IsToolEnabled("delegate") && len(registry.ListAgentIDs()) > 1 {
delegateTool := tools.NewDelegateTool()
delegateTool.SetSpawner(NewSubTurnSpawner(al))
currentAgentID := agentID
delegateTool.SetSelfAgentID(currentAgentID)
delegateTool.SetAllowlistChecker(func(targetAgentID string) bool {
return registry.CanSpawnSubagent(currentAgentID, targetAgentID)
})
agent.Tools.Register(delegateTool)
}
}
}