Summary

When a spawned subagent completes and the announce flow attempts to deliver to the requester, it fails with:

Delivery failed (whatsapp to +64273938855): Error: No active WhatsApp Web listener (account: default)

The delivery tries to use the default account instead of the correct account (e.g., kev) because accountId is not propagated through the subagent spawn → announce → delivery chain.

Root Cause

The sessions_spawn tool captures agentChannel (e.g., "whatsapp") but not agentAccountId. When the announce flow later calls callGateway({ method: "agent", deliver: true }), it has no way to specify which account to use for delivery.

The delivery code in delivery.ts tries to get accountId from sessionEntry?.lastAccountId, but when the announce triggers a fresh agent run, the session entry lookup may not have the right account context.

Fix

Thread accountId through the entire subagent lifecycle:

1. sessions-spawn-tool.ts: Accept agentAccountId in tool options, pass to registerSubagentRun()
2. subagent-registry.ts: Store requesterAccountId in SubagentRunRecord, pass to runSubagentAnnounceFlow()
3. subagent-announce.ts: Pass channel and accountId to the gateway agent call
4. agent.ts (gateway handler): Accept accountId param, resolve it with fallback to sessionEntry?.lastAccountId
5. delivery.ts: Use opts.accountId with fallback to session-based resolution
6. agent.ts (schema): Add accountId to AgentParamsSchema

Files Changed

• src/agents/tools/sessions-spawn-tool.ts
• src/agents/subagent-registry.ts
• src/agents/subagent-announce.ts
• src/agents/clawdbot-tools.ts
• src/commands/agent/types.ts
• src/commands/agent/delivery.ts
• src/gateway/server-methods/agent.ts
• src/gateway/protocol/schema/agent.ts

Testing

1. Start gateway with WhatsApp account kev
2. Spawn a subagent: sessions_spawn task="What is 2+2?" agentId="scout"
3. Wait for completion
4. Verify announce is delivered via correct WhatsApp account

Before fix: Delivery fails with "No active WhatsApp Web listener (account: default)"
After fix: Delivery succeeds via account kev