Adaptation, fine-tuning, and post-training decisions
Test whether adaptation fixes the needed behavior without breaking another.
Reviewed: 2026-10-03
Source-based teaching example · Fictional data
Narration: Microsoft Mark · locally synthesized

00:00:00.000 — What you will learn

Test whether adaptation fixes the needed behavior without breaking another.

Visual description:
Test whether adaptation fixes the needed behavior without breaking another.

00:00:07.375 — The idea

Choose the change from the observed failure. Test improvements on separate cases. Also check behavior you need to preserve, especially refusal and access boundaries.

Visual description:
Choose the change from the observed failure. Test improvements on separate cases. Also check behavior you need to preserve, especially refusal and access boundaries.

00:00:21.583 — One useful term

Held-out cases. Cases not used to fit or select the change, reserved for testing it.

Visual description:
Cases not used to fit or select the change, reserved for testing it.

00:00:30.708 — A worked example

The simulated scorecard shows better style after tuning, but worse handling of missing evidence. It adds no retrieval accuracy. The example rejects that change and keeps a different design.

Visual description:
The simulated scorecard shows better style after tuning, but worse handling of missing evidence. It adds no retrieval accuracy. The example rejects that change and keeps a different design.

00:00:45.833 — Your turn to think

Is better style enough if important safety behavior gets worse? Pause and decide before continuing.

Visual description:
Is better style enough if important safety behavior gets worse?
Pause the video if you need more time.

00:01:03.292 — Why this answer works

No. Use the declared critical checks. Retrieval is also not a mandatory first step when it cannot address the defect.

Visual description:
No. Use the declared critical checks. Retrieval is also not a mandatory first step when it cannot address the defect.

00:01:14.542 — Check 1

Match the fix to the failure.

Visual description:
Match the fix to the failure.

00:01:19.208 — Check 2

Test improved and retained capabilities.

Visual description:
Test improved and retained capabilities.

00:01:24.750 — Check 3

Apply critical failure rules separately.

Visual description:
Apply critical failure rules separately.

00:01:30.208 — Now try a different case

Open the lesson and try its different practice case. Use every check in the full task. Watching alone does not mark the lesson complete.

Visual description:
Open the lesson
Try the new case
Check and revise
The full task and its requirements are in the linked lesson.