TRD-12 · Put the tool down

Document a case from your own work where the right move was to ignore the model — and turn it into something teachable. What was the signal that told you to stop, and how would a first-year apprentice recognize it?

Cases from the student's own logged work across this bank: the trials, error logs, and refusal entries already collected. If no genuine case emerged, the student may use one documented by a mentor, clearly attributed. A case may not be invented. If neither exists, the correct deliverable is a written account of why the tool never had to be put down in this task family, and what conditions would change that — which is a finding, not a failure, and is graded on the same terms.

Fabricating a dramatic near-miss because the real logs are undramatic. Writing "always use judgment," which teaches nobody anything. Naming a signal that is only recognizable after you already know the answer. Making it a story about a clever student rather than a transferable reflex.

A teaching case: the situation with the model's suggestion quoted exactly as it appeared; the signal that prompted doubt, stated so a first-year could notice it before knowing the outcome; what was done instead and what the verification cost in time; the consequence had the suggestion been followed, in shop terms; and a one-page version usable in a first-year class — the reflex, the signal, the check.

CT: reconstructing what was knowable at the moment of the decision. CR: turning one case into a transferable rule. CO: a first-year student reads the case and says what they would have done. CM: the one-page teaching version. CZ: who was protected, and by what.

A credentialed technician confirms the case is real and the signal is recognizable in advance. Standing instruction: reject any case the student cannot trace to their own logs or a named mentor's account. School-supervised.

R1: one case, one signal, one reflex. R2: traceable to logged work. R3: comparator is what the model suggested. R4: consequence stated in shop terms. R5: the one-page version teaches without the author present. R6: this brief is R6 — the refusal is the artifact.

(a) An invented near-miss, which is the one failure in this bank that cannot be graded up. (b) A signal only visible in hindsight, so it teaches nothing to someone standing in front of the job.

Lane A immediately, and the natural finale for this track. Best assigned after TRD-01 or TRD-04 has produced real logs. No verified credit claim.