Both defects come from live session fced377e, where scaffold_frontend burned 89
turns without converging.
#419 — the stage output manifest never tracked deletions. A deletion is a
FileWrittenEvent with a null postImageHash, and stageWrittenPaths filtered that
per-event instead of per-path, so a written-then-deleted file stayed in the
manifest forever. The contract gate stamps file_exists on every entry, which made
deleting — and therefore renaming, which is delete plus write — a permanent
contract violation. That deadlocked against the build gate: it ordered "rename it
to use the '.cjs' file extension", the agent complied, and the contract gate then
failed file_exists on the .js it had just been told to remove. Keep the last
mutation per path instead. Fixed in the shared function, so the build-gate
toolchain probe, the review gate, and verification all stop seeing deleted files
too. Moved to its own file to keep the gates file under the detekt function cap.
#417 — file_edit failed 4 of 6 live calls, all "Target not found" with a correct
"did you mean" suggestion attached. flexibleMatch already tolerated indentation
drift but walked target lines against file lines positionally, so one blank line
the model dropped shifted every later index and missed the whole block. Compare
only non-blank lines and map the hit back to real file lines. Ambiguity still
fails rather than picking a match, and reindent keeps handling the writeback.
Guard tests both ways, each mutation-verified against the old logic.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
kami
d1b84a1a9f