Allow guarded CI fixes on stacked PRs #404
- MA
## Why
The readiness publisher rejected every proposal on a stacked PR, including a one-commit CI repair that does not rewrite the stack. This left failing CI on stacked children outside the agentic workflow.
## Change
Allow a `fix` proposal on a same-repository stacked PR. Keep the existing parent and child head checks, one-commit validation, protected-path policy, exact review, and head lease. Stacked merge and rebase proposals remain gated on a trusted replay boundary.
## Stack and verification
This change follows #403 in the local preparation stack. It will be restacked onto final `main` when its turn comes. The combined local #402–#404 stack passed 203 maintenance tests, `bun run ci`, `bun run types`, and `bun run build`. CI must run again on the final PR head.
## Publication path

MaggieAppletonreferenced this in Scope PR readiness scans to event-related stacks #402last month on GitHub
MaggieAppletonreferenced this in Clarify source paths in PR readiness hash reviews #403last month on GitHub
MaggieAppletonhead-ref-force-pushed 77138654579clast month on GitHub
MaggieAppletonmerged e0c77056655elast month on GitHub
MaggieAppletonhead-ref-deletedlast month on GitHub