P1: Define SDK-facing task ledger RPCs

[BunsDev]

Goal

Expose background/detached work through SDK-facing task ledger RPCs.

OpenMeow and other apps need a stable way to show background subagents, ACP jobs, cron-like tasks, and async jobs without parsing internal session logs.

Proposed methods

• tasks.list
• tasks.get
• tasks.cancel

Acceptance criteria

• Tasks have stable IDs and statuses.
• Tasks can be filtered by status, agent, and session.
• Cancellation has a clear result contract.
• Run/task/session relationships are visible when known.

References

• https://github.com/OpenCoven/open-meow-sdk/blob/main/docs/rpc-contract-proposals.md#taskslistgetcancel
• https://github.com/OpenCoven/open-meow-sdk/blob/main/docs/prioritized-backlog.md#6-add-task-ledger-rpcs

[BunsDev]

Dogfood update from 2026-05-02:

P1 SDK surface probe results:

• artifacts.list via SDK: live Gateway returned unknown method: artifacts.list.
• raw artifacts.list: live Gateway returned unknown method: artifacts.list.
• tasks.list via SDK: SDK reports this is not supported by the current Gateway yet.
• raw tasks.list: live Gateway returned unknown method: tasks.list.
• environments.list via SDK: SDK reports this is not supported by the current Gateway yet.

Assessment:

• Keep these as design/proposal issues for now.
• They are not blockers for the P0 OpenMeow chat/run/cancel dogfood path.