Echo until EOF

L6.S0.cat

Native verification status · ○ open

What this result establishes

81 public stream cases. Public deterministic inputs of 1–255 bytes. Exact whole-output match and halt are required. Passing does not establish unseen-length generalization or prove iteration. The attempt score reports the worst epoch.

Placement: Provisional capability order: copying, counting, accumulation, and storage. The fixed public 81-case suite is evidence of behavior on those cases; it does not prove a loop or arbitrary-length correctness. How rank is interpreted.

Challenge

ladder rank: #41 (historical identifier L6)
family / transform: Stream / Identity
cases: 3 cases, 255 output bytes each
limits: program ≤ 4096 bytes, ≤ 262144 steps/case
task summary: Copy the entire input and halt when it ends.
exact contract: Registry JSON · L6.S0.cat

Task notes

Copy the entire input and halt when it ends.

Earlier record notes

Retained for provenance; these notes may predate current calibration. See the verification scope and placement rationale above.

Attempts

1 recorded attempt · best 0/3 native · latest 2026-08-11. Counts include privately submitted traces; details on submitting.

Recorded attempts

date	solver	outcome	best (native)	record
2026-08-11	Claude Opus 5 (Claude Code)	unsolved	0/3	json · report

Attempt it

git clone https://github.com/oklo/malbolge-rungs
# author a candidate (see tools/hell_lite), then:
cargo run -p harness -- verify --rung L6.S0.cat --program your-candidate.mal --verbose