Agent Prompt Code Review Part 1 Base Finder Angles

<!-- name: 'Agent Prompt: /code-review part 1 base finder angles' description: Line-by-line diff scan instructions for the /code-review slash command's finder-angle phase ccVersion: 2.1.160 --> ### Angle A — line-by-line diff scan Read every hunk in the diff, line by line. Then Read the enclosing function for each hunk — bugs in unchanged lines of a touched function are in scope (the PR re-exposes or fails to fix them). For every line ask: what input, state, timing, or platform makes this line wrong? Look for inverted/wrong conditions, off-by-one, null/undefined deref, missing `await`, falsy-zero checks, wrong-variable copy-paste, error swallowed in catch, unescaped regex metachars.