update quick reference

Author: jharan1

packages/gen-ai/.claude/skills/flake-check/SKILL.md

@@ -11,10 +11,10 @@ Investigate failing CI checks on a PR and classify each failure using live CI da
 
 | Invocation | What it does |
 |---|---|
-| `/flake-check <PR>` | Investigate a single PR — fetches failing checks, reads logs, classifies each failure |
-| `/flake-check <PR> --deep` | Same as above, plus detects checks that previously failed then passed on the same commit SHA |
+| `/flake-check <PR>` | Investigate a single PR — fetches failing checks, reads logs, classifies each failure, checks code overlap between failing tests and PR changes |
+| `/flake-check <PR> --deep` | Same as above, plus rerun detection (checks that failed then passed on the same SHA — hidden flakiness) |
 | `/flake-check scan` | Lightweight survey of the last 7 days of PRs for recurring failure patterns (no log fetching) |
-| `/flake-check scan --deep` | Same as above, plus rerun detection, test-level pattern analysis, and file-level overlap for each recurring test |
+| `/flake-check scan --deep` | Same as above, plus rerun detection (checks that failed then passed on the same SHA — hidden flakiness), test-level pattern analysis, and file-level overlap for each recurring test |
 | `/flake-check scan <N>d` | Survey PRs from the last N days (e.g. `scan 7d`) |
 | `/flake-check scan --file <filename>` | Find every PR in the window where a specific test file appeared in failures (fetches logs — slower) |