Why: the earlier disable was a misdiagnosis — ActionRequiredError
looked like a monthly quota cap, but the real cause was the DM
executor not passing --model auto, so cursor fell back to a
quota-limited model. PR #644 (deps/development-manager) fixed the
executor; the quota itself was never exhausted.
Evidence: AGENT-EXECUTION.md validate ok; #644 in main since d2035c7.
Impact: restores cursor as first implementation/repair candidate.
Refs: AGENT-EXECUTION.md; PR #644