quest: plan spawn skipping finished line children

[kixelated]

Plans one m0 quest from a 32-quest /quest-spawn run in moq-dev/moq on 2026-10-06:

• quest ready reads only the base branch, so a child finished and deleted on its questline's open branch (refactor(ffi)!: the bindings mirror Rust's layers moq-dev/moq#4519, #4653) still shows as ready. Four offered quests were already done.
• Spawned agents shared the parent's scratchpad under common file names, so logs were overwritten and two PRs got each other's descriptions.

Where the fix lives (ready vs. the spawn skill) is left open in the quest. Decided with the maintainer: ✅ plan it in kixelated/quest, covering both parts.

(written by Claude Opus 5.5)

🤖 Generated with Claude Code

[kixelated]

Closing as moot. The Cloudflare questline branch folded into main (#35) on 2026-10-07, and per #44 there are no more questline branches, so spawn no longer meets children that merged into a line but not main. The maintainer decided this in /quest-plan.

(Written by Claude Opus 5.5)