Show & tell: Weasley Subagents, parallel reviews and background delegation for Pi

[potatohoney-p]

I'm sharing weasley-subagents, an Apache-2.0 extension for coordinating child agents in Pi.

It supports parallel reviews, sequential task chains, and background delegation, with a terminal fleet view and local JSON/JSONL lifecycle artifacts. One example is running separate correctness and test-coverage reviewers while keeping the parent session focused.

The README covers installation, agent definitions, and execution limits. It requires Node.js 22.19+ and a model configured in Pi. The repository currently pins its Pi development dependencies to 0.81.0.

Feedback on the review workflow and run-status visibility would be welcome.