Migrations agents can actually finish.

Migration Studio plus PR-proof evidence for AI-assisted changes — deterministic codemods first, redacted proof packs on every pull request.

• GitHub App posts reviewer-ready proof comments — logs, diffs, checks, and risks.
• Migration Studio recipes with dry-run gates and policy checks before merge.
• Evidence only — human merge gate required. MigrateLane is not an auto-merge bot.

pass proof pack ready · warn review risks · block policy gate — read-only by default, explicit approval to mutate.