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The second access-control screen spun for 2h20m on one ordinary mage-ai change: a Next.js build commit whose 3 MB one-line bundles hold 12,355 functions each. `source.ranges_from_ir` ran two regex scans of the whole line once per function, and the screen kept its 422 finished changes in memory only, so stopping it lost them. - `source.ranges_from_ir`: a line over MINIFIED_LINE_CHARS (2000) is not checked per function; JavaScript names on it stay anonymous, other languages keep the parser's name. - `source.generated_reason`: why a changed file is build output (a directory the product walk leaves out, a minified name, over MAX_FILE_BYTES, a line over the cap). `hunt.producers._candidates` leaves such files out and records the reason on the context; the fix site of a vulnerability is always kept. The DSPy arm shares the enumeration. - The screen writes rows.jsonl and log.jsonl per change (rows first, entry last) and resumes by skipping logged ids. Tests: the minified line never reaches the per-function scan; generated_reason on the four shapes and two source files; build output in an ordinary change yields no rows while a vulnerability path in a one-line file is kept. Co-Authored-By: Claude Fable 5.1 <[email protected]>