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feat(agent): create/resume factory seam

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Add the agent-creation factory seam on ctx.agents (AgentRegistry):
setFactory/create/resume plus the AgentFactory interface and
CreateAgentOptions/ResumeAgentOptions. AgentLoop implements AgentFactory
and registers itself via ctx.agents.setFactory(this), so plugins
create/resume agents through the interface without depending on the
concrete loop package.

- create({ agentId, sessionId, meta?, agentOptions? }) — programmatic
  create on a caller-supplied session id (e.g. an ACP-generated id).
- resume({ agentId, resumeSessionId, agentOptions? }) — load a persisted
  session via ctx.sessionPersistence (RFC 009) and resume an agent on it;
  the live session id is the resumed id, turn numbering and derived
  history continue from the loaded log. sessionPersistence is NOT
  hard-injected (non-persistent demos still work); resume rejects with a
  typed error when it is absent. assertAgentIdFree runs before any
  session is created (and again after the load await) so a duplicate id
  never leaves an orphaned live session.

Adds the runtime dsh-session-persistence dependency to agent-loop.
This commit is contained in:
Tianyi Cui
2026-06-15 21:12:14 +08:00
parent df4b7d3d9a
commit 9a4006cb2b
13 changed files with 516 additions and 25 deletions
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packages/agent-loop/README.md
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@@ -8,7 +8,12 @@ This is the only package in the harness that contains concrete loop logic. Every
### Public API
- `ctx.agentLoop.create(id: string, options?: AgentOptions): LoopAgent` — create an agent on a fresh per-run session id `${id}-session-<uuid>`, start its loop, and register it in `ctx.agents`. The per-run uuid avoids colliding with the on-disk log a prior run materialized once a durable persistence backend is loaded; each run is a new session (a deliberate demo simplification — a real resume-or-create policy is a TODO). Disposed with the calling fiber.
- `ctx.agentLoop.create(id: string, options?: AgentOptions): LoopAgent` — config-driven create: an agent on a fresh per-run session id `${id}-session-<uuid>` (no cwd). Used for `cordis.yml`-configured agents. The per-run uuid avoids colliding with the on-disk log a prior run materialized once a durable persistence backend is loaded; each run is a new session (a deliberate demo simplification — a real resume-or-create policy is a TODO). Disposed with the calling fiber.
`AgentLoop` also implements the `AgentFactory` seam and registers itself via `ctx.agents.setFactory(this)`, so plugins create/resume agents through `ctx.agents` (the interface):
- `ctx.agents.create({ agentId, sessionId, meta?, agentOptions? })` — programmatic create on a caller-supplied `sessionId` (e.g. an ACP-generated id), NOT `${id}-session`.
- `ctx.agents.resume({ agentId, resumeSessionId, agentOptions? })` — load a persisted session via `ctx.sessionPersistence` (RFC 009) and resume an agent on it. The live session id is the resumed id; turn numbering and derived history continue from the loaded log. Requires a session-persistence backend (NOT hard-injected — non-persistent demos still work; `resume` rejects with a typed error when persistence is absent).
### Injected services