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refactor: hide the concrete agent loop

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This commit is contained in:
Tianyi Cui
2026-07-14 02:32:35 +08:00
parent 31c29609d1
commit 225796c90d
40 changed files with 234 additions and 217 deletions
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2
docs/architecture.md
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@@ -17,7 +17,7 @@ A harness is one [Cordis](cordis-primer.md) context. Packages contribute service
| `ctx.systemPrompt` | `dsh-system-prompt` | ordered prompt sections, tool schemas, and prompt variables |
| `ctx.tools` | `dsh-tools` | tool registry and [execution pipeline](tool-execution-pipeline.md) |
| `ctx.agents` | `dsh-agent` | live agent registry, public `Agent` handle, `agent/*` events |
| `ctx.agentLoop` | `dsh-agent-loop` | shipped `ReactLoopAgent` driver |
| `ctx.agentLoop` | `dsh-agent-loop` | shipped concrete `Agent` driver |
### Capability Services

2
docs/config-catalog.md
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@@ -129,7 +129,7 @@ export interface Config {
Depends on: [`AgentOptions`](../packages/core/agent/src/index.ts) · [`SessionId`](../packages/core/session/src/index.ts)
Source: [`packages/core/agent-loop/src/index.ts:324`](../packages/core/agent-loop/src/index.ts)
Source: [`packages/core/agent-loop/src/index.ts:323`](../packages/core/agent-loop/src/index.ts)
## `@deepseek-ai/dsh-bash-local`

26
docs/cordis-catalog/events.md
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@@ -23,7 +23,7 @@ An agent's fully composed scoped world was published in the AgentRegistry. Its s
Types: [Agent](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:304`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:303`](../../packages/core/agent/src/types.ts)
### `agent/disposed` — emit
@@ -35,7 +35,7 @@ An agent was removed from the registry. The concrete AgentLoop lifecycle emits t
Types: [Agent](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:319`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:318`](../../packages/core/agent/src/types.ts)
### `agent/error` — emit
@@ -47,7 +47,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w
Types: [Agent](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:593`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:592`](../../packages/core/agent/src/types.ts)
### `agent/pre-step` — serial
@@ -61,7 +61,7 @@ Serial (awaited in registration order), not a waterfall: a listener mutates the
Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:426`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:425`](../../packages/core/agent/src/types.ts)
### `agent/prompt-submit` — waterfall
@@ -73,7 +73,7 @@ Waterfall: decide what happens to ONE drained queued message before it becomes a
Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:444`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:443`](../../packages/core/agent/src/types.ts)
### `agent/queued` — emit
@@ -85,7 +85,7 @@ A message entered the agent's inbox (queued or steering). Content and the resolv
Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:348`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:347`](../../packages/core/agent/src/types.ts)
### `agent/request` — waterfall
@@ -97,7 +97,7 @@ Waterfall: shape the step's call configuration — model switching, sampling ove
Types: [Agent](../core-data-structures/core.md) · [LlmCallConfig](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:473`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:472`](../../packages/core/agent/src/types.ts)
### `agent/session-prefix` — waterfall
@@ -113,7 +113,7 @@ The seed is a frozen empty list; a contributing listener returns a NEW array —
Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:525`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:524`](../../packages/core/agent/src/types.ts)
### `agent/session-start` — emit
@@ -125,7 +125,7 @@ The agent's session lifecycle began, fired once before its first turn. `source`
Types: [Agent](../core-data-structures/core.md) · [SessionStartSource](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:369`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:368`](../../packages/core/agent/src/types.ts)
### `agent/status` — emit
@@ -137,7 +137,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle
Types: [Agent](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:333`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:332`](../../packages/core/agent/src/types.ts)
### `agent/step-result` — waterfall
@@ -149,7 +149,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va
Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:540`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:539`](../../packages/core/agent/src/types.ts)
### `agent/turn-continuation` — waterfall
@@ -161,7 +161,7 @@ Waterfall: override the turn-continuation decision via a typed ContinuationDecis
Types: [Agent](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:558`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:557`](../../packages/core/agent/src/types.ts)
### `agent/turn-stop` — serial
@@ -173,7 +173,7 @@ Serial terminal-stop checkpoint after the ordinary `agent/turn-continuation` wat
Types: [Agent](../core-data-structures/core.md)
Source: [`packages/core/agent/src/types.ts:576`](../../packages/core/agent/src/types.ts)
Source: [`packages/core/agent/src/types.ts:575`](../../packages/core/agent/src/types.ts)
## `approval/*`

8
docs/cordis-catalog/services.md
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@@ -11,15 +11,17 @@ The **harness tier** below (the `@deepseek-ai/dsh-*` packages) is the vocabulary
## `ctx.agentLoop` — `AgentLoop`
Concrete ReactLoopAgent factory and driver service.
Concrete agent factory and driver service.
```ts cordis-catalog
create(id: SessionId, options: AgentOptions = {}, meta: Pick<SessionHeader, 'cwd'> = {}): ReactLoopAgent
create(id: SessionId, options: AgentOptions = {}, meta: Pick<SessionHeader, 'cwd'> = {}): Agent
async createAgent(ownerCtx: Context, options: CreateAgentOptions): Promise<AgentHandle>
async resume(ownerCtx: Context, options: ResumeAgentOptions): Promise<AgentHandle>
```
Source: [`packages/core/agent-loop/src/index.ts:337`](../../packages/core/agent-loop/src/index.ts)
Types: [Agent](../core-data-structures/core.md)
Source: [`packages/core/agent-loop/src/index.ts:336`](../../packages/core/agent-loop/src/index.ts)
## `ctx.agents` — `AgentRegistry`

2
docs/core-data-structures/core.md
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@@ -248,7 +248,7 @@ The fourteen event variants (`turn/start`, `turn/end`, `step/start`, `step/end`,
## The agent handle
`Agent` is the surface every plugin (UI, hooks, orchestrators) programs against. The concrete implementation is `ReactLoopAgent` in dsh-agent-loop; nothing outside the loop depends on the implementation.
`Agent` is the surface every plugin (UI, hooks, orchestrators) programs against. The concrete implementation is package-internal to dsh-agent-loop; nothing outside the loop depends on it.
Source: [`packages/core/agent/src/types.ts`](../../packages/core/agent/src/types.ts)

26
docs/event-producer-consumer.md
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@@ -7,19 +7,19 @@ This matrix shows which packages dispatch each harness-owned event and which pac
| Event | Mode | Declared in | Dispatchers | Listeners |
| --- | --- | --- | --- | --- |
| `agent/created` | `emit` | [`packages/core/agent/src/types.ts:304`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`jsonrpc`](../packages/ui/jsonrpc), [`stdio-agent`](../packages/ui/stdio-agent) |
| `agent/disposed` | `emit` | [`packages/core/agent/src/types.ts:319`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`stdio-agent`](../packages/ui/stdio-agent) |
| `agent/error` | `emit` | [`packages/core/agent/src/types.ts:593`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
| `agent/pre-step` | `serial` | [`packages/core/agent/src/types.ts:426`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`compact-basic`](../packages/compact/compact-basic), [`user-approval`](../packages/ui/user-approval) |
| `agent/prompt-submit` | `waterfall` | [`packages/core/agent/src/types.ts:444`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`acp`](../packages/ui/acp), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard) |
| `agent/queued` | `emit` | [`packages/core/agent/src/types.ts:348`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
| `agent/request` | `waterfall` | [`packages/core/agent/src/types.ts:473`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
| `agent/session-prefix` | `waterfall` | [`packages/core/agent/src/types.ts:525`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`tool-skill`](../packages/skill/tool-skill) |
| `agent/session-start` | `emit` | [`packages/core/agent/src/types.ts:369`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`invariants`](../packages/support/invariants) |
| `agent/status` | `emit` | [`packages/core/agent/src/types.ts:333`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`invariants`](../packages/support/invariants), [`stdio-agent`](../packages/ui/stdio-agent) |
| `agent/step-result` | `waterfall` | [`packages/core/agent/src/types.ts:540`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
| `agent/turn-continuation` | `waterfall` | [`packages/core/agent/src/types.ts:558`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
| `agent/turn-stop` | `serial` | [`packages/core/agent/src/types.ts:576`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`subagent-inprocess`](../packages/subagent/subagent-inprocess) |
| `agent/created` | `emit` | [`packages/core/agent/src/types.ts:303`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`jsonrpc`](../packages/ui/jsonrpc), [`stdio-agent`](../packages/ui/stdio-agent) |
| `agent/disposed` | `emit` | [`packages/core/agent/src/types.ts:318`](../packages/core/agent/src/types.ts) | [`agent`](../packages/core/agent) (`events.dispatch`) | [`stdio-agent`](../packages/ui/stdio-agent) |
| `agent/error` | `emit` | [`packages/core/agent/src/types.ts:592`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
| `agent/pre-step` | `serial` | [`packages/core/agent/src/types.ts:425`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`compact-basic`](../packages/compact/compact-basic), [`user-approval`](../packages/ui/user-approval) |
| `agent/prompt-submit` | `waterfall` | [`packages/core/agent/src/types.ts:443`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`acp`](../packages/ui/acp), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`repeat-tool-guard`](../packages/guard/repeat-tool-guard) |
| `agent/queued` | `emit` | [`packages/core/agent/src/types.ts:347`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | - |
| `agent/request` | `waterfall` | [`packages/core/agent/src/types.ts:472`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
| `agent/session-prefix` | `waterfall` | [`packages/core/agent/src/types.ts:524`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`tool-skill`](../packages/skill/tool-skill) |
| `agent/session-start` | `emit` | [`packages/core/agent/src/types.ts:368`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`invariants`](../packages/support/invariants) |
| `agent/status` | `emit` | [`packages/core/agent/src/types.ts:332`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`emit`) | [`invariants`](../packages/support/invariants), [`stdio-agent`](../packages/ui/stdio-agent) |
| `agent/step-result` | `waterfall` | [`packages/core/agent/src/types.ts:539`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | - |
| `agent/turn-continuation` | `waterfall` | [`packages/core/agent/src/types.ts:557`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`waterfall`) | [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) |
| `agent/turn-stop` | `serial` | [`packages/core/agent/src/types.ts:575`](../packages/core/agent/src/types.ts) | [`agent-loop`](../packages/core/agent-loop) (`serial`) | [`subagent-inprocess`](../packages/subagent/subagent-inprocess) |
| `approval/request` | `waterfall` | [`packages/ui/user-approval/src/index.ts:70`](../packages/ui/user-approval/src/index.ts) | [`user-approval`](../packages/ui/user-approval) (`waterfall`) | [`acp`](../packages/ui/acp) |
| `fs/edit-intent` | `waterfall` | [`packages/fs/fs/src/index.ts:123`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`waterfall`) | [`fs-policy`](../packages/fs/fs-policy) |
| `fs/observed` | `emit` | [`packages/fs/fs/src/index.ts:138`](../packages/fs/fs/src/index.ts) | [`tool-fs`](../packages/fs/tool-fs) (`emit`) | [`fs-policy`](../packages/fs/fs-policy) |

2
docs/rfc/implemented/feature/2026-06-21-subagent-capability-seam.md
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@@ -10,7 +10,7 @@ The harness has a long-deferred seam for **subagents** — an agent delegating w
The distinctive requirement — the one that shapes the whole design — is that **multiple subagent implementations must coexist at runtime**. A parent may want a cheap in-process child for a scoped subtask AND an isolated out-of-process child (over ACP) in the same session. The transports we foresee:
- **in-process** — a child `ReactLoopAgent` on the same `Context` (the cheapest, and nearly free given the existing agent factory);
- **in-process** — a child concrete `Agent` on the same `Context` (the cheapest, and nearly free given the existing agent factory);
- **ACP** — act as an ACP *client* driving another agent process (which can be another instance of ourselves);
- later: **A2A**, the **Codex app-server**, and the **Claude Code Agent SDK** — each the same out-of-process "start a child, prompt it, stream updates, cancel" shape as the ACP backend.