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Add detached agents and heartbeat scheduling (#1266)

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Mohamed Boudra
2026-06-01 14:07:31 +08:00
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parent 89ec358d00
commit 7fb3dda20c
13 changed files with 443 additions and 271 deletions
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docs/agent-lifecycle.md
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@@ -14,14 +14,14 @@ Each agent in `AgentManager` carries a `lastStatus` of `initializing`, `idle`, `
## Relationships
Agents can launch other agents via the `create_agent` MCP tool. When they do, the daemon stamps the new agent with a label `paseo.parent-agent-id` pointing back at the caller (`packages/server/src/server/agent/mcp-server.ts:804`). The client surfaces that as `agent.parentAgentId`.
Agents can launch other agents via the agent-scoped `create_agent` MCP tool. Agent-scoped creation is always asynchronous. By default, the daemon stamps the created agent with a label `paseo.parent-agent-id` pointing back at the agent that created it. The client surfaces that as `agent.parentAgentId`.
There is exactly one relationship type today: `parentAgentId`. The daemon does not distinguish between:
Agent-scoped `create_agent` accepts `detached: true` for agents that should stand on their own. The daemon still uses the creating agent for cwd/config inheritance, but does not write `paseo.parent-agent-id`.
- **Subagents** — children that exist as part of the parent's work (e.g. orchestration tasks the parent delegates and waits on)
- **Detached agents** — children launched to take over from the parent (e.g. handoffs, fire-and-forget delegations)
- **Subagents** — created with `detached: false` or omitted. They exist as part of the creating agent's work, appear in that agent's subagent track, and are archived with it.
- **Detached agents** — created with `detached: true`. They take over as sibling/root agents (e.g. handoffs, fire-and-forget delegations), do not appear in the creating agent's subagent track, and are not archived with it.
Both look the same in storage. This is an accepted limitation — see [Limitations](#limitations).
`notifyOnFinish` defaults to `true` for agent-scoped creation because most subagents are delegated work the creating agent needs to hear back from. Set it to `false` only for truly fire-and-forget agents.
## Archive
@@ -77,12 +77,6 @@ We considered universal decoupling (no tab close ever archives, archive is alway
## Limitations
### Detached agents are cascade-archived
The daemon can't tell a "subagent" apart from a "detached agent" — both carry `paseo.parent-agent-id`. So when you archive an agent that previously launched a detached child (e.g. via `/paseo-handoff`), cascade will archive the detached child too, even though semantically it should outlive the originator.
Until a richer relation model lands (e.g. a `relation: "subagent" | "detached"` field on creation, or a separate channel for handoff launches), this trade-off stands. Workaround: don't archive an agent whose work was handed off, or unarchive the detached child afterward.
### Subagent accumulation under long-lived parents
A parent that spawns many subagents will see the track grow. There's no automatic cleanup for completed subagents — the user prunes via the archive button on each row. A bulk gesture (e.g. "archive all idle children") could land later if this becomes a real problem.
@@ -99,11 +93,11 @@ $PASEO_HOME/agents/{cwd-with-dashes}/{agent-id}.json
Each agent is a single JSON file. Fields relevant to this doc:
| Field | Type | Meaning |
| --------------------------------- | ------------- | ------------------------------------------------------------- |
| `id` | `string` | Stable identifier |
| `archivedAt` | `string?` | Soft-delete timestamp (ISO 8601) |
| `labels["paseo.parent-agent-id"]` | `string?` | Parent agent ID, set automatically by `create_agent` MCP tool |
| `lastStatus` | `AgentStatus` | `initializing` / `idle` / `running` / `error` / `closed` |
| Field | Type | Meaning |
| --------------------------------- | ------------- | ----------------------------------------------------------------------------------------- |
| `id` | `string` | Stable identifier |
| `archivedAt` | `string?` | Soft-delete timestamp (ISO 8601) |
| `labels["paseo.parent-agent-id"]` | `string?` | Parent agent ID, set automatically by agent-scoped `create_agent` unless `detached: true` |
| `lastStatus` | `AgentStatus` | `initializing` / `idle` / `running` / `error` / `closed` |
See [`docs/data-model.md`](./data-model.md) for the full agent record.