## 1. Exit Probe

- [x] 1.1 Add a narrow followthrough-reentry exit helper.
- [x] 1.2 Add default-off config gates for the exit probe.
- [x] 1.3 Wire the hold into the sell path for the followthrough reentry entry code only.

## 2. Branch and Observation

- [x] 2.1 Add `alpha_first_glued_followthrough_mid_exit_probe_config()`.
- [x] 2.2 Register the new branch in daily pipeline outputs.

## 3. Reporting and Validation

- [x] 3.1 Add a focused review script for the mid exit probe.
- [x] 3.2 Add a regression test pinning the historical fixture.
- [x] 3.3 Run the review script.
- [x] 3.4 Run full validation and publish acceptance summary.