Solo builder. Issue → PR: five IBM Bob 2.0 custom modes that turn a bug report into a review-ready pull request. An orchestrator runs four sandboxed subtasks: reproduce the bug with a failing test, diagnose the root cause, apply a minimal fix (the Fixer cannot edit tests, enforced by Bob's fileRegex), and write the PR. Evaluated on 10 seeded bugs with hidden tests Bob never saw: 9/10 fixed, ~2 Bobcoins per bug.