license: apache-2.0
task_categories:
- text-generation
language:
- en
tags:
- hemlock
- dpo
- orpo
- preference
- code
pretty_name: Poison-DPO
Poison-DPO
Preference pairs for de-biasing Hemlock code models away from Python/JS habits ("poison") and toward idiomatic Hemlock.
Each row is a minimal pair:
chosen— clean, idiomatic Hemlock that runs under the interpreter.rejected— the same program with one Python/JS-ism injected, verified to fail (parse/runtime error) or produce different output.
Because chosen and rejected differ by exactly one idiom, the preference signal (DPO/ORPO odds-ratio) isolates the specific behavior to suppress.
Coverage
Targets the standard-library / idiom errors a Python/JS-pretrained base reaches for:
| Hemlock (chosen) | Python/JS-ism (rejected) |
|---|---|
map.delete(k) |
map.remove(k) |
map.has(k) |
k in map |
map.keys() |
Object.keys(map) |
arr.push(x) |
arr.append(x) |
print(x) |
println(x) |
`${x}` (template) |
f"{x}" |
"...json..." |
'...json...' (rune-literal trap) |
arr.length |
len(arr) |
s.contains(x) |
s.includes(x) |
parse() / stringify() |
loads() / dumps() |
for (x in arr) |
for (i in range(len(arr))) |
null / fn(x){...} |
None / lambda x: ... |
Construction
Every pair was generated and validated through the Hemlock interpreter: the
chosen must exit 0, and the rejected must fail or diverge. Pairs are sourced
from authored idiom templates (deep, targeted coverage) and from corruption of the
real hemlang/hemlock-formulary-SFT programs (breadth over actual stdlib usage).
Schema
{"prompt": "...", "chosen": "<clean hemlock>", "rejected": "<poisoned hemlock>"}
Usable directly with ORPO/DPO/SimPO/CPO/IPO (needs chosen + rejected).