Pi v0.84.2 adds sharper agent control

This is a practical refinement release that makes Pi more usable in long, customized coding sessions while strengthening its appeal as a hackable alternative to bundled coding agents.

• –Fullscreen transcript search makes navigating lengthy agent sessions substantially faster.
• –`defaultTools` lets developers tailor safety and capabilities globally or per project.
• –Strict schema sampling could improve reliability for built-in file and shell operations, though its experimental status warrants caution.
• –Streaming usage and tool-namespace fixes matter for SDK, RPC, proxy, and multi-provider integrations.
• –Pi’s extension-first architecture continues to differentiate it from more opinionated coding-agent products. [Project overview](https://github.com/earendil-works/pi)