ForgeBench v2 — self-verification report (publication-time)
Date: 2026-10-27 · Host: constrained sandbox (PolarFS workdir, overlay upper-layer ~full)
1. Schema validation — PASS
- 130/130 rows contain all 9 required fields; eval_criteria contains all 5 keys.
- task_id uniqueness: OK. target/task_scope enum values: OK.
- Cross-check: forge-1.20.1 goldens contain no
import net.neoforged*; neoforge-1.21.1 goldens contain noimport net.minecraftforge*(comment mentions allowed). - multi_file rows: context and golden_reference are dicts with project-relative paths.
2. Golden self-test (ast_eval --self-test semantics, in-process) — PASS 130/130
Every golden_reference evaluated against its own target profile:
- 130 passed, 0 failed, 0 penalty warnings.
- Harness upgrades applied during verification (part of the v2 harness): a) tokenizer fallback: sources that tokenize but exceed javalang's Java-8 grammar (records/switch expressions) are analyzed via regex imports/annotations with a PARSE_LIMITATION info finding (no penalty; sandbox compile stays authoritative); b) non-java resource gate (json/toml/yaml/gradle) now strips // and # comment lines before forbidden-API matching (fixes false positives on migration comments); c) .yml/.yaml added to resource suffixes (GitHub Actions golden in BUILD_017).
3. Contamination check vs SFT corpus — CLEAN
- Baseline: local package of
ComerX/forge-neoforge-sft-v2.1.0-rc1(8,357 records, 45 jsonl files, 15 families). - Method: normalized 8-line-window exact-match between all v2 golden files and every SFT record text (messages + context_files), comments/blank lines dropped.
- Raw result (k=8): 4 window hits on 2 records — manual inspection shows BOTH are
idiomatic boilerplate collisions (ModDevGradle
runs{}block; standard AbstractContainerScreen.render override), not copied content. - Strict result (k=12): 0 hits → verdict CLEAN.
- Machine-readable: reports/contamination_result.json.
4. Docker compile gate — NOT EXECUTED (infra limitation, disclosed)
- Publication host: no guaranteed Docker daemon; memory ceiling ~4 GB < NeoForm ≥8 GB.
- Status: harness shipped as designed-not-executed. Re-verify on a ≥8 GB runner before quoting Pass@1 numbers. Both template targets carry a MEMORY CONTRACT header.
5. Artifacts
- data/forgebench_v2_full.jsonl (130 rows) — SHA256 in SHA256SUMS.txt
- verification scripts: scripts/ in the publication workdir (merge_v2.py, verify_goldens.py, contamination_check.py)