v0.4.2

Agents v0.4.2 coordinates AI coding agents through task state, handoffs,
findings, verification, and human approval.

See README.md and tutorials/tiny-todo-cli.md in each archive for a
quick start.

Changelog

• e3a7bee Add durable task plan mode
• 4d3f425 Add plan review gate
• 8007ad8 Archive plan refine task
• 29b6637 Harden reviewer branch parity checks
• 577c958 Improve archive summary hygiene
• 1eae2e1 Make plan drafts free-form
• e34b9c3 Make plan mode substantive
• ad1b317 Replace plan revise with refine