Uncover mission
Find the target: what was this work supposed to achieve? Follow the threads the change gives you — the caller's objective, the session brief, the PR body (prefer a ## Goal section), the linked issue or ticket. Prefer the most direct statement of intent, and state the target in one line.
If the threads lead nowhere, ask once; if there's still nothing, say so, and hand off to /assess-against-mission with no target found.