main 6575ce3250: UI thread deletion
thread-owned files before: 4 (2 answer files + 1 extracted text + 1 message file)
thread-owned files after: 3 (2 answer files + extracted text leaked)
ordinary message file removed: true

pr 471c1068e0039f98271d0c9b8edae7e92f5d75a4: UI thread deletion
target files before: 4
target files after: 0
unrelated thread files after: 1

pr: UI project removal
remaining files before: 4 (fresh answer TXT, RTF, extracted text, unrelated message TXT)
remaining files after: 0
git repository README preserved: true

all projects, threads, uploads and Codex gpt-6.1-sol turns created through Chrome/Playwright in the real web app.
SQLite was read-only; no fixture data or mocks used.
blacksmith check:changed: format, lint, knip 1/2 + 2/2, graphql, 3-package typecheck and 47 tests passed.
focused startup/thread/project deletion checks: 9 tests passed.