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fix(session): persist the delegation depth in the session header

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A subagent child's recursion depth lived only in runtime AgentOptions,
so a persisted child came back from resume counted as top-level and
maxDepth stopped binding after every restart. Add
SessionHeader.delegationDepth, round-trip it through the JSONL and
SQLite backends (SQLite schema v5), restore it on agent-loop resume,
and write it when the in-process backends create a child. The seam now
owns the shared depth vocabulary (delegationDepthOf): the persisted
header is authoritative and monotone — runtime options may deepen it
but never lower it.
This commit is contained in:
Yichen Jiang
2026-07-19 17:20:36 +08:00
parent e05e7a0870
commit 0d00106fa8
29 changed files with 229 additions and 106 deletions
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8
docs/cordis-catalog/events.md
View File

@@ -542,7 +542,7 @@ A ready child settled. Scope-filtered dispatch uses the same delegating parent c
Types: [Scoped](../core-data-structures/scope.md) · [SubagentService](../core-data-structures/subagent.md)
Source: [`packages/subagent/subagent/src/index.ts:112`](../../packages/subagent/subagent/src/index.ts)
Source: [`packages/subagent/subagent/src/index.ts:138`](../../packages/subagent/subagent/src/index.ts)
### `subagent/provider-added` — emit
@@ -559,7 +559,7 @@ A provider became resolvable in the registry.
Types: [SubagentProvider](../core-data-structures/subagent.md)
Source: [`packages/subagent/subagent/src/index.ts:86`](../../packages/subagent/subagent/src/index.ts)
Source: [`packages/subagent/subagent/src/index.ts:112`](../../packages/subagent/subagent/src/index.ts)
### `subagent/provider-removed` — emit
@@ -574,7 +574,7 @@ A provider left the registry. Accepted runs remain holder-owned.
'subagent/provider-removed'(name: string): void
```
Source: [`packages/subagent/subagent/src/index.ts:92`](../../packages/subagent/subagent/src/index.ts)
Source: [`packages/subagent/subagent/src/index.ts:118`](../../packages/subagent/subagent/src/index.ts)
### `subagent/start` — emit
@@ -596,7 +596,7 @@ A provider established a ready child. For in-process providers, `ctx.agents.get(
Types: [Scoped](../core-data-structures/scope.md) · [SubagentService](../core-data-structures/subagent.md)
Source: [`packages/subagent/subagent/src/index.ts:103`](../../packages/subagent/subagent/src/index.ts)
Source: [`packages/subagent/subagent/src/index.ts:129`](../../packages/subagent/subagent/src/index.ts)
## `system-prompt/*`

6
docs/cordis-catalog/services.md
View File

@@ -216,7 +216,7 @@ roots(): Agent[]
Types: [Agent](../core-data-structures/core.md) · [SessionId](../core-data-structures/core.md)
Source: [`packages/core/agent/src/index.ts:217`](../../packages/core/agent/src/index.ts)
Source: [`packages/core/agent/src/index.ts:223`](../../packages/core/agent/src/index.ts)
## `ctx.approval` — `ApprovalService`
@@ -820,7 +820,7 @@ fork(source: SessionForkSource, boundary?: number, childSessionId?: SessionId):
Types: [CreateSessionOptions](../core-data-structures/persistence.md) · [Session](../core-data-structures/session.md) · [SessionId](../core-data-structures/core.md)
Source: [`packages/core/session/src/index.ts:577`](../../packages/core/session/src/index.ts)
Source: [`packages/core/session/src/index.ts:581`](../../packages/core/session/src/index.ts)
## `ctx.skills` — `SkillService`
@@ -934,7 +934,7 @@ async start(name: string, request: SubagentStartRequest): Promise<SubagentRun>
Types: [SubagentProvider](../core-data-structures/subagent.md) · [SubagentRun](../core-data-structures/subagent.md) · [SubagentStartRequest](../core-data-structures/subagent.md)
Source: [`packages/subagent/subagent/src/index.ts:153`](../../packages/subagent/subagent/src/index.ts)
Source: [`packages/subagent/subagent/src/index.ts:179`](../../packages/subagent/subagent/src/index.ts)
## `ctx.systemPrompt` — `SystemPrompt`

7
docs/core-data-structures/persistence.md
View File

@@ -60,6 +60,12 @@ interface SessionHeader {
* boundary lets resume and replay distinguish parent history from child work.
*/
readonly seedLength?: number
/**
* Delegation depth: absent (zero) for a top-level session, parent depth + 1
* for a subagent child. Persisted so a recursion budget survives restart and
* resume — a runtime-only depth would reset a resumed child to top-level.
*/
readonly delegationDepth?: number
}
```
@@ -85,6 +91,7 @@ interface CreateSessionOptions {
readonly parentSession?: SessionId
readonly createdAt?: number
readonly seedLength?: number
readonly delegationDepth?: number
}
}
```

8
docs/event-producer-consumer.md
View File

@@ -30,10 +30,10 @@ This matrix shows which packages dispatch each harness-owned event and which pac
| `session/disposed` | `emit` | [`packages/core/session/src/index.ts:57`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`agent-loop`](../packages/core/agent-loop), [`session-persistence`](../packages/session-persistence/session-persistence) |
| `session/event` | `emit` | [`packages/core/session/src/index.ts:69`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`acp`](../packages/ui/acp), [`cli-demo`](../packages/examples/cli-demo), [`invariants`](../packages/support/invariants), [`jsonrpc`](../packages/ui/jsonrpc), [`session-persistence`](../packages/session-persistence/session-persistence), [`stdio`](../packages/ui/stdio), [`token-meter`](../packages/llm/token-meter), [`tui`](../packages/ui/tui), [`workspace-context`](../packages/context/workspace-context) |
| `session/flush` | `parallel` | [`packages/core/session/src/index.ts:79`](../packages/core/session/src/index.ts) | [`session`](../packages/core/session) (`events.dispatch`) | [`session-persistence`](../packages/session-persistence/session-persistence) |
| `subagent/end` | `emit` | [`packages/subagent/subagent/src/index.ts:112`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`jsonrpc`](../packages/ui/jsonrpc) |
| `subagent/provider-added` | `emit` | [`packages/subagent/subagent/src/index.ts:86`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`emit`) | [`tool-subagent`](../packages/subagent/tool-subagent) |
| `subagent/provider-removed` | `emit` | [`packages/subagent/subagent/src/index.ts:92`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`tool-subagent`](../packages/subagent/tool-subagent) |
| `subagent/start` | `emit` | [`packages/subagent/subagent/src/index.ts:103`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`hooks-claude`](../packages/hooks/hooks-claude) |
| `subagent/end` | `emit` | [`packages/subagent/subagent/src/index.ts:138`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`jsonrpc`](../packages/ui/jsonrpc) |
| `subagent/provider-added` | `emit` | [`packages/subagent/subagent/src/index.ts:112`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`emit`) | [`tool-subagent`](../packages/subagent/tool-subagent) |
| `subagent/provider-removed` | `emit` | [`packages/subagent/subagent/src/index.ts:118`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`tool-subagent`](../packages/subagent/tool-subagent) |
| `subagent/start` | `emit` | [`packages/subagent/subagent/src/index.ts:129`](../packages/subagent/subagent/src/index.ts) | [`subagent`](../packages/subagent/subagent) (`events.dispatch`) | [`hooks-claude`](../packages/hooks/hooks-claude) |
| `system-prompt/assemble` | `waterfall` | [`packages/core/system-prompt/src/index.ts:27`](../packages/core/system-prompt/src/index.ts) | [`system-prompt`](../packages/core/system-prompt) (`waterfall`) | [`acp`](../packages/ui/acp) |
| `system-prompt/change` | `emit` | [`packages/core/system-prompt/src/index.ts:33`](../packages/core/system-prompt/src/index.ts) | [`system-prompt`](../packages/core/system-prompt) (`emit`) | - |
| `tools/change` | `emit` | [`packages/core/tools/src/index.ts:116`](../packages/core/tools/src/index.ts) | [`tools`](../packages/core/tools) (`emit`) | - |

30
docs/persistence-catalog.md
View File

@@ -79,7 +79,7 @@ export type SessionEvent<T extends SessionEventType = SessionEventType> = {
}[T]
```
Sources: [`packages/core/session/src/types.ts:255`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:262`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:292`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:324`](../packages/core/session/src/types.ts)
Sources: [`packages/core/session/src/types.ts:262`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:269`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:299`](../packages/core/session/src/types.ts) · [`packages/core/session/src/types.ts:331`](../packages/core/session/src/types.ts)
## Events
@@ -151,7 +151,7 @@ Source: [`packages/ui/user-approval/src/index.ts:68`](../packages/ui/user-approv
Types: [StreamChunk](core-data-structures/llm-streaming.md)
Source: [`packages/core/session/src/types.ts:219`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:226`](../packages/core/session/src/types.ts)
#### `assistant/message` — surface
@@ -167,7 +167,7 @@ Source: [`packages/core/session/src/types.ts:219`](../packages/core/session/src/
Types: [ContentBlock](core-data-structures/core.md) · [TokenUsage](core-data-structures/llm-streaming.md)
Source: [`packages/core/session/src/types.ts:226`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:233`](../packages/core/session/src/types.ts)
### `bash/*`
@@ -258,7 +258,7 @@ Source: [`packages/compact/compact/src/types.ts:22`](../packages/compact/compact
Types: [ContentBlock](core-data-structures/core.md) · [MessageSource](core-data-structures/core.md)
Source: [`packages/core/session/src/types.ts:212`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:219`](../packages/core/session/src/types.ts)
### `hook/*`
@@ -336,7 +336,7 @@ Source: [`packages/ui/permission/src/index.ts:33`](../packages/ui/permission/src
Types: [ContentBlock](core-data-structures/core.md) · [MessageSource](core-data-structures/core.md)
Source: [`packages/core/session/src/types.ts:204`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:211`](../packages/core/session/src/types.ts)
### `request/*`
@@ -350,7 +350,7 @@ Source: [`packages/core/session/src/types.ts:204`](../packages/core/session/src/
'request/header': { header: EpochHeader; reason: RequestHeaderReason }
```
Source: [`packages/core/session/src/types.ts:251`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:258`](../packages/core/session/src/types.ts)
### `steering/*`
@@ -363,7 +363,7 @@ Source: [`packages/core/session/src/types.ts:251`](../packages/core/session/src/
Types: [ContentBlock](core-data-structures/core.md) · [MessageSource](core-data-structures/core.md)
Source: [`packages/core/session/src/types.ts:244`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:251`](../packages/core/session/src/types.ts)
### `step/*`
@@ -374,7 +374,7 @@ Source: [`packages/core/session/src/types.ts:244`](../packages/core/session/src/
'step/end': { turn: number; step: number }
```
Source: [`packages/core/session/src/types.ts:197`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:204`](../packages/core/session/src/types.ts)
#### `step/start` — log-only
@@ -383,7 +383,7 @@ Source: [`packages/core/session/src/types.ts:197`](../packages/core/session/src/
'step/start': { turn: number; step: number }
```
Source: [`packages/core/session/src/types.ts:195`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:202`](../packages/core/session/src/types.ts)
### `todo/*`
@@ -396,7 +396,7 @@ Source: [`packages/core/session/src/types.ts:195`](../packages/core/session/src/
Types: [TodoItem](core-data-structures/session.md)
Source: [`packages/core/session/src/types.ts:246`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:253`](../packages/core/session/src/types.ts)
### `tool/*`
@@ -413,7 +413,7 @@ Source: [`packages/core/session/src/types.ts:246`](../packages/core/session/src/
Types: [CallId](core-data-structures/core.md)
Source: [`packages/core/session/src/types.ts:232`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:239`](../packages/core/session/src/types.ts)
#### `tool/code-dispatch` — log-only
@@ -457,7 +457,7 @@ Source: [`packages/core/tools/src/code-mode.ts:34`](../packages/core/tools/src/c
Types: [CallId](core-data-structures/core.md) · [ContentBlock](core-data-structures/core.md)
Source: [`packages/core/session/src/types.ts:242`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:249`](../packages/core/session/src/types.ts)
### `turn/*`
@@ -474,7 +474,7 @@ Source: [`packages/core/session/src/types.ts:242`](../packages/core/session/src/
Types: [TurnEndReason](core-data-structures/session.md)
Source: [`packages/core/session/src/types.ts:193`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:200`](../packages/core/session/src/types.ts)
#### `turn/start` — log-only
@@ -490,7 +490,7 @@ Source: [`packages/core/session/src/types.ts:193`](../packages/core/session/src/
Types: [TurnTrigger](core-data-structures/session.md)
Source: [`packages/core/session/src/types.ts:187`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:194`](../packages/core/session/src/types.ts)
### `user/*`
@@ -503,4 +503,4 @@ Source: [`packages/core/session/src/types.ts:187`](../packages/core/session/src/
Types: [ContentBlock](core-data-structures/core.md) · [MessageSource](core-data-structures/core.md)
Source: [`packages/core/session/src/types.ts:199`](../packages/core/session/src/types.ts)
Source: [`packages/core/session/src/types.ts:206`](../packages/core/session/src/types.ts)