shipped spoolcast dev log 12 — the approval badge that lied

shipped dev log 12. the video is about a bug that looked impossible: a bright green "approved" badge sitting on top of a completely blank page. the ui said the step was done. the engine underneath had already crashed. the interface was guessing the state instead of reading it.

the root cause was dumber than the symptom. one 5,000-line file held the whole workflow ui, and to track whether a user had hand-edited a step we threaded a custom status flag down through it. that broke type-checking, so the checker got silenced — and the checker was already pointed at an empty files list, validating nothing. broken code shipped clean and blanked the page. the deeper problem was the one big file itself: every hand-off needed matching paperwork, so the ui improvised instead of knowing.

the fix was structural, not a patch. cut the 5,000-line file down to a sub-500-line routing shell and moved truth into a single engine-owned state manager that tracks dirty state per node. that made the guessing bug impossible to write. it also killed a backend deadlock where a stage blocked on a missing output file while refusing to run the action that creates it. the new save flow is engine-first: the ui sends your input to the engine and only advances if the engine accepts it and writes to disk. drafting writes content, approving records the human gate — neither does the other's job. agent drafting is metered now too, every model call logged to a usage ledger. expensive models diagnose and architect, cheap models do the mechanical work, and every step still stops at a human approval gate.