mirror of
https://github.com/deepseek-ai/deepseek-harness
synced 2026-08-15 21:04:50 +00:00
066f94c7e0
Hard line breaks mid-paragraph make docs harder to edit and diff — a one-word change reflows and re-diffs the whole paragraph. Reflow all tracked non-vendor Markdown (plus vendor/AGENTS.md) so each prose paragraph is a single line; soft-wrapping is the editor's job. Fenced code, tables, and list structure are preserved (wrapped list items fold to one line per bullet). Documents the convention in AGENTS.md.
73 lines
2.7 KiB
Markdown
73 lines
2.7 KiB
Markdown
# dsh-agent-loop
|
|
|
|
THE concrete agent plugin: `LoopAgent` and the loop driver. Implements the `Agent` interface and drives the session/turn/step lifecycle.
|
|
|
|
This is the only package in the harness that contains concrete loop logic. Everything else is an abstract service or a plugin against extension seams — new behavior goes into plugins, not here.
|
|
|
|
## Service: `AgentLoop` (ctx key: `agentLoop`)
|
|
|
|
### Public API
|
|
|
|
- `ctx.agentLoop.create(id: string, options?: AgentOptions): LoopAgent` Create an agent, start its loop, and register it in `ctx.agents`. Disposed with the calling fiber.
|
|
|
|
### Injected services
|
|
|
|
`agents`, `sessions`, `llm`, `tools`, `systemPrompt` — all five interface services.
|
|
|
|
### Configuration (schemastery)
|
|
|
|
```ts
|
|
Config: {
|
|
agents: Array<{
|
|
id: string // required
|
|
model?: string
|
|
systemPrompt?: string
|
|
}>
|
|
}
|
|
```
|
|
|
|
Agents listed in config are auto-created at startup.
|
|
|
|
### Classes
|
|
|
|
- `LoopAgent` — the concrete `Agent` implementation. Owns the inbox (`Inbox`), the per-step `AbortController`, and the loop driver. Everything observable happens through session events and the `agent/*` event taxonomy.
|
|
- `Inbox` — per-agent queued + steering FIFOs (`enqueue`, `steer`, `drainQueued`, `drainSteering`, `waitForQueued`).
|
|
|
|
### Loop lifecycle (`loop.ts`)
|
|
|
|
One invocation of `runLoop()` drives one agent for its whole lifetime:
|
|
|
|
```
|
|
forever:
|
|
wait for queued messages (idle)
|
|
TURN (error-contained):
|
|
drain queued → session('user/message') → 'turn/start'
|
|
STEP loop:
|
|
drain steering
|
|
assembly = systemPrompt.assemble()
|
|
request = waterfall agent/request
|
|
stream llm.stream(request) → session('assistant/chunk')
|
|
message = waterfall agent/step-result
|
|
session('assistant/message')
|
|
each tool-call: session('tool/call') → tools.execute() → session('tool/result')
|
|
drain steering → session('steering/message')
|
|
cont = waterfall agent/turn-continuation
|
|
if !cont: break
|
|
session('turn/end')
|
|
await session/flush
|
|
re-enqueue leftover steering as queued
|
|
idle unless more queued
|
|
```
|
|
|
|
Error containment: a throwing plugin ends the **turn**, never the loop. Dispose mid-turn emits `agent/status('disposed')` and ends with reason `disposed`.
|
|
|
|
### What is NOT here
|
|
|
|
Everything that goes beyond "call the model, run the tools, repeat" belongs to plugins listening on the event taxonomy:
|
|
- Hooks: `agent/request`, `agent/step-result`, `tools/execute`, `agent/turn-continuation`
|
|
- Compaction: `agent/request`
|
|
- Sandbox, permission, plan mode: `tools/execute`
|
|
- Sub-agents: TODO seam on `AgentLoop.create()`
|
|
- Persistence: `session/event` + `session/flush`
|
|
- UI: `agent/stream-chunk` + `agent/*` events
|