nx_forge_loop_gate.nx

nx_forge_loop_gate.nx -- gate for the A1 closed maker-checker loop (nx_forge_loop). Deterministic, NO model: a forked stub maker (socket bound+listening BEFORE fork = raceless) serves scripted /gen responses per cycle and CAPTURES each request body, proving: T1 GREEN@1 passthrough: good candidate -> rc=1 T1b cycle-1 request carries NO repair header (clean first prompt) T2 REPAIR CONVERGENCE: cycle1 = let-reassign BUILD-FAIL (the 1.5B fbench-T2 failure class; the compiler names the fix) -> cycle2 = fixed candidate -> rc=2 T2b cycle-2 request MUST carry "PRIOR ATTEMPT FAILED" + the verbatim compiler word ("reassign") = the little-coder +18% retry lever, mechanized and asserted T3 NEG: a maker that IGNORES the repair ctx (same broken candidate every cycle) must NOT converge -> rc=-21 (anti-rubber-stamp tooth) T4 NEG: no serve listening -> rc=-30 (fail-loud, no silent fallback) Fixture /gen JSONs are BUILT at gate time from the fixture .nx programs via fc_json_esc_bytes (always in sync with the sources). license_tier: ORIGINAL expect_exit: 0