PR: GitHub pingdotgg/t3code#23167; git.cafe pingdotgg/t3code#23184
main: 8b74a69019 (github/main fetched this run)
PR head: ba01d331c3184d5d17d82a92bab84c9588829d1f
Linux, /usr/bin/google-chrome, repository Playwright, real dev web client.
Created project through Add project > Local folder, pointing to /home/user/backslash-repro.
Selected Codex GPT-6.1-Sol in composer. Actual provider turns created and committed baseline files, then modified all three files.
Main Changes card paths:
  back/slash.txt +2
  back/slash.txt +1  <-- literal backslash filename incorrectly normalized
  plain.txt +1
Clicked +1 slash.txt: diff expanded back/slash.txt containing NESTED_ONE/NESTED_TWO; literal file stayed collapsed.
Stopped main PID 15710 before starting candidate.
Copied only this task-created app state for matching comparison. Candidate used explicit --home-dir /home/user/t3code/.t3.
Candidate Changes card paths:
  back/slash.txt +2
  back\slash.txt +1
  plain.txt +1
Clicked back\slash.txt: correct diff expanded BASE_LITERAL / LITERAL_ONLY.
Fresh candidate Codex GPT-6.1-Sol turns restored baseline, then repeated identical changes. Same correct result.
Neighbor checks: nested file diff +2, plain file diff +1, collapse-all and expand-all preserve root rows and toggle nested row.
Blacksmith: cd apps/web && vp test run --project unit src/lib/turnDiffTree.test.ts src/diffFileActions.test.ts
Result: 2 files passed, 14 tests passed. No source changes made.
2	0	back/slash.txt
1	0	"back\\slash.txt"
1	0	plain.txt