| --- |
| license: cc0-1.0 |
| task_categories: |
| - text-generation |
| language: |
| - en |
| tags: |
| - code |
| - minecraft |
| - forge |
| - neoforge |
| - benchmark |
| - loader-migration |
| size_categories: |
| - n<1K |
| pretty_name: ForgeBench v2 (dual-target Forge 1.20.1 / NeoForge 1.21.1) |
| configs: |
| - config_name: forgebench_v2_full |
| data_files: |
| - split: train |
| path: data/forgebench_v2_full.jsonl |
| --- |
| # ForgeBench v2 — dual-target Forge 1.20.1 / NeoForge 1.21.1 evaluation benchmark |
|
|
| **Dataset**: `ComerX/forgebench-v2` · **Predecessor**: `ComerX/forgebench-v1` |
| **Task**: code generation benchmark for Minecraft loader migration, 130 tasks. |
|
|
| ## What changed vs v1 (and why) |
|
|
| | v1 defect | v2 fix | |
| |---|---| |
| | `net.minecraftforge.*` hard-coded as hallucination for ALL targets (Forge 1.20.1 code scored 0) | target-aware profiles in `ast_eval.py`: forge-1.20.1 allows `net.minecraftforge.*` natively; neoforge-1.21.1 penalizes it | |
| | Single MDK template (NeoForge 21.1.77) | dual templates: `template-forge-1.20.1` (ForgeGradle 6, JDK 17, Gradle 8.1.1) + `template-neoforge-1.21.1` (NeoForge 21.1.77, JDK 21, Gradle 8.9); `--target` switch | |
| | api module punished Forge 1.20.1 via `forbidden_apis` | new native forge tasks `FORGE_API_001..020` (registry, events, capabilities, config, menus, networking, datagen, ...) | |
| | Porting limited to single-file micro-refactors | new `porting` module: `PORT_001..010` multi-file slices (context = Forge 1.20.1 slice, golden = NeoForge 1.21.1 file set); architecture chain example PORT_006 (block → BlockEntity → Menu → Screen → registries → client event) | |
| | ast_eval was globally static | per-target profiles, `--self-test` mode, tokenizer fallback for modern grammar (records/switch), comment-aware resource gate | |
|
|
| ## Contents |
|
|
| ``` |
| data/forgebench_v2_full.jsonl 130 tasks (merged) |
| data/schema_example_v2.jsonl schema examples |
| parts/forge_api_{a..d}.jsonl FORGE_API_001..020 (forge 1.20.1, single_file) |
| parts/porting_{a..c}.jsonl PORT_001..010 (neoforge 1.21.1, multi_file) |
| harness/Dockerfile dual-target sandbox image |
| harness/sandbox_runner.py --target forge-1.20.1 | neoforge-1.21.1; single-file & multi-file staging |
| harness/ast_eval.py target-aware static gate (+ --self-test) |
| harness/run_benchmark.py batch driver |
| harness/gametest_runner.py GameTest stage (optional, gametest_required tasks) |
| harness/judge_prompt.txt LLM-as-a-Judge prompt |
| template-forge-1.20.1/ ForgeGradle 6 MDK template (Java 17) |
| template-neoforge-1.21.1/ NeoForge 21.1.77 MDK template (Java 21) |
| VERIFICATION.md self-verification results |
| ``` |
|
|
| ## Task schema (v2) |
|
|
| ```json |
| { |
| "task_id": "FORGE_API_014 | PORT_003 | ...", |
| "module": "api | mixin | migration | debug | build | porting", |
| "target_loader": "forge | neoforge", |
| "target_version": "1.20.1 | 1.21.1", |
| "task_scope": "single_file | multi_file", |
| "instruction": "...", |
| "context": "string | {relative_path: code}", |
| "golden_reference": "string | {relative_path: code}", |
| "eval_criteria": { |
| "must_compile": true, |
| "required_annotations": ["@Mod", "@SubscribeEvent"], |
| "forbidden_apis": ["net.neoforged (forge tasks) | net.minecraftforge (neoforge tasks)"], |
| "allowed_legacy_apis": [], |
| "gametest_required": false |
| } |
| } |
| ``` |
|
|
| Composition: api 40 (20 v1-neoforge + 20 forge-native) · mixin 20 · migration 20 · debug 20 · build 20 · porting 10. |
| Targets: neoforge-1.21.1 × 110 · forge-1.20.1 × 20. Scopes: single_file × 120 · multi_file × 10. |
|
|
| ## Runner usage |
|
|
| ```bash |
| docker build -t forgebench-sandbox:v2 harness/ |
| # single file, forge target: |
| python3 harness/sandbox_runner.py --task task.json --code-file answer.java --target forge-1.20.1 |
| # multi-file porting: |
| python3 harness/sandbox_runner.py --task task.json --candidate-dir answer/ --target neoforge-1.21.1 |
| # static gate + golden self-test: |
| python3 harness/ast_eval.py --task task.json --code answer.java |
| python3 harness/ast_eval.py --task task.json --self-test |
| ``` |
|
|
| ## Honest limitations |
|
|
| 1. **Gradle compile gates are NOT executed at publication time.** Publication host has a |
| ~4 GB memory ceiling and no guaranteed Docker; NeoForm decompilation needs ≥8 GB. The |
| harness, templates and both targets are shipped untested-by-execution; the golden |
| self-verification performed is static only (`ast_eval --self-test`, 130/130 pass) plus |
| schema and contamination checks. Do not cite compile-validated numbers for v2 until a |
| ≥8 GB runner executes the sandbox end-to-end. |
| 2. Gradle wrapper JARs are binaries: copy them from the official MDK archives into both |
| template trees before `docker build` (see harness/Dockerfile header). |
| 3. `ast_eval.py` uses javalang (Java 8 grammar): modern-syntax answers (records, switch |
| expressions) fall back to regex checks with a PARSE_LIMITATION info finding — no score |
| penalty; the authoritative gate is the sandbox Gradle build. |
| 4. Porting slices are focused (1–6 files, avg 2.4); PORT_006 is the full 6-file |
| architecture chain. Broader slices (5–10 files) are reserved for v2.1. |
| 5. The sandbox resource gate forbids raw `javac` and Mockito; gradle build is the only |
| compile authority. |
|
|
| ## License |
|
|
| Tasks are original synthetic artifacts (CC0-1.0 for the benchmark data). Harness: Apache-2.0. |
| ForgeBench tasks are contamination-checked against the ComerX SFT corpus (see VERIFICATION.md). |
|
|
