2 commits

Author	SHA1	Message	Date
Shay	1c59f331f4	feat(rate): exact time-unit conversion for single-rate (R3.2b-e) ... Option A (text-faithful): RateProblem gains time_unit (the duration's ORIGINAL unit; time stays int; defaults to the rate denominator). The SOLVER converts via convert_time -> exact Fraction -> int-or-refuse(non_integer); Fraction never leaves the solver, no floats. The reader accepts a convertible (minute<->hour) duration mismatch (keeps original time_unit); a non-convertible one still refuses rate_unit_mismatch. Signature includes time_unit ('30 minutes' != '30 hours'). Gold: r3-09 flips reader_refuses -> SOLVED (60 mph for 30 min = 30 mile, exact 1/2 hour; distractor 1800 rejected); new r3-13 non-convertible (3 gallons) stays rate_unit_mismatch. R3 gold 13/13; reader 9/0/0 -> answers 7/0/6 (setup_correct 8->9). Failure-family: rate_unit_mismatch now non-convertible-only -> still unsupported_rate_duration proposal surface; router-hygiene invariant stays green; R1 7/0/3, R2 10/0/0 unchanged. 119-test smoke green incl. invariants. Off-serving, no float path.	2026-06-08 05:43:51 -07:00
Shay	6b1fdbff45	feat(rate): single-rate reader + run_reader lane + answer-choice reuse (R3d) ... generate/rate_comprehension/reader.py: read_rate_problem comprehends explicit single-rate prose into a RateProblem via structural recognizers — rate value (<N> <plural> per <singular>), duration (for/in <N> <unit>), standalone quantity (outside those spans), query (how many <unit> by unit-match, or speed in <X> per <Y> -> rate). The compound-unit-consistency check is the wrong=0 gate: a duration whose unit isn't the rate denominator (miles/hour for 30 minutes) REFUSES rate_unit_mismatch, never converts. Refuses combined_rates (>=2 rate clauses), temporal_state (clock markers), missing_rate/time/quantity (underdetermined). run_reader lane + 'reader' CLI. R3 reader: setup_correct 8 / setup_wrong 0 / refused_correct 4 -> answers 6 correct / 0 wrong / 6 refused (the 6/0/6 target). Reuses R2 verify_answer_choice end-to-end. Off-serving. 6 reader tests + constructed unit-mismatch guard.	2026-06-07 23:07:51 -07:00