judgment-qc-gate-qwen3-4b-GGUF

Judgment QC gate: v10, Q8_0 GGUF

Ready-to-serve quantisation of a 4B LoRA fine-tune that reviews work against one operator's standards and returns a single-line verdict. Built to run as a Stop-hook gate on a live coding agent: a violation verdict blocks the agent's reply and is fed back so it fixes the problem or explains why the verdict does not apply.

These weights are byte-identical to the model running in production on the author's machine.

• File: judgment-qwen3-4b-Q8_0.gguf (4.3 GB)
• Base: Qwen/Qwen3-4B
• Adapter, corpus, evaluation, and limitations: see the companion LoRA repo, read it before deploying this, particularly the Limitations section

Serve

llama-server -m judgment-qwen3-4b-Q8_0.gguf \
  --host 127.0.0.1 --port 8005 \
  --ctx-size 4096 --parallel 1 -ngl 99 -fa 1 \
  --jinja --reasoning-budget 0 --no-warmup

--reasoning-budget 0 matters: the fine-tune emits an empty <think></think> block before its verdict (the corpus contains no reasoning traces). Disable thinking, or strip the block in post-processing.

Output contract

VERDICT: OK
VERDICT: <TAG> | <one-sentence correction>
VERDICT: ABSTAIN | <what is missing>

<TAG> comes from a closed vocabulary of about 14: VERIFY, NO-OVERCLAIM, HOLD-LINE, SCOPE, SIMPLE, DESIGN, SAFETY, ROOT-CAUSE, NO-SILENT-FAIL, MAINTAIN, CURRENT, PROACTIVE, CONCERN-MAP, FULL-BUILD.

Prefix each situation with its phase, pre (plan / approach), during (execution), or post (before it ships / claiming done):

[phase: post] Assistant cited a CVE number as the relevant vulnerability without
having looked it up anywhere.

VERDICT: VERIFY | You can't cite a CVE without checking it against the real source.

Measured behaviour

Measured against this exact file while it was serving live, using two fixed probe sets:

The false-positive count falling to 0/30 tracks the corpus rebalancing: the training set is now about 60 percent compliant-but-risky-looking work, so the model stopped blocking clean situations while still catching every planted violation.

Two honest caveats. Recall is at ceiling on this probe set, which means the probe set is too easy; treat 12/12 as "no obvious misses", not "catches everything". And 30 clean cases is a small set, so read 0/30 as a direction, not a guarantee.

Wiring it as a gate

Treat VERDICT: OK as pass and anything else as a correction to act on. Fail open, loudly. If the gate is unreachable, let the work through and say the gate was down. A quality gate that silently blocks is worse than no gate.

Attribution

Built by Altronis. The corpus is one operator's own review history, approved example by example, and generalised to contain no names, figures, or private details.