Task 3.5. A proposer is handed facts, never the scores it is about to be judged
on: the misses and leaks of one family on the train split, what each run
actually did, and the hypotheses this family already tried and lost. A holdout
pair never appears in those facts. Self-diagnosis from free narrative
confabulates; structured facts are what make a proposal answerable.
A proposal is one hypothesis, one lever and one file inside one family's
directory, and the narrowness is the safety property: a round can only touch
what it targets, so every other family is frozen by construction rather than by
promise. A proposal that names two files, an unknown file, a path leaving the
directory, or a prompt over the cap is refused by name, and the write roots
exclude the verifier code and the corpus.
The scripted proposer runs out rather than repeating itself. The HarnessX
proposer reports its write roots and degrades with a recorded reason when the
extra is absent; its evolve call lands with the live rounds.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG
