Surface rustqual suppressions and config edits in the gate

• Status: Todo
• Kind: Feature
• Authors: jp
• Date: 2026-10-06
• Label: domain=tooling
• Label: type=task

With no committed baseline, the gate can only be silenced in two ways: a qual:allow marker in the code, or an edit under .config/rustqual/. Make both visible wherever the gate reports. Builds on T-0yh5frr.

Gate behaviour (qual diff)

• List qual:allow, qual:api and qual:test_helper markers added since the base, in their own section, with file, line and reason.
• List changed files under .config/rustqual/ in their own section.
• Fail on any added qual:allow that has no reason:.
• Neither section fails the gate otherwise. They exist so a reviewer sees them, and so CI and cargo_check show them to the author.

Assistant instructions

Update the dev and rfd-implementor personas, and the coding skill if it covers verification:

• Fix the finding. Don't add a suppression, change a threshold, or edit .config/rustqual/ unless the user asked for it in this conversation.
• If a finding looks wrong, say so and stop; don't route around it.