Deterministic First, LLM Second: An Advisory CI Pre-Screen

May 18, 2026 · 1:00 PM UTC ·8 min read · 0 reactions · 0 comments · 28 views

TL;DR · WeSearch summary

A new pre-screening system for pull requests has been implemented, replacing the previous Gemini system that frequently encountered errors. The new system utilizes a deterministic classifier to evaluate submissions based on specific rules, while a Groq LLM provides advisory summaries without affecting the primary decision. This design allows for seamless operation even if the LLM encounters issues, ensuring consistent CI outcomes.

Key facts

▪The old PR review system faced numerous errors, leading to the development of a new pre-screening system.
▪The new system features a deterministic classifier that evaluates submissions and an LLM that provides advisory summaries.
▪The LLM's outputs do not block the primary CI decision, ensuring that the workflow continues even if the LLM fails.

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Original publisher	DEV.to (Top)
Canonical URL	https://dev.to/jeremy_longshore/deterministic-first-llm-second-an-advisory-ci-pre-screen-8o6
Publication time	Mon, 18 May 2026 13:00:26 +0000
Retrieval time	2026-05-18T13:04:56.494Z
Last seen	2026-05-18T13:04:56.494Z
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Opening excerpt (first ~120 words) tap to expand

try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3842419) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Jeremy Longshore Posted on May 18 • Originally published at startaitools.com Deterministic First, LLM Second: An Advisory CI Pre-Screen #cicd #githubactions #llm #deterministicsystems The old PR review system ran Gemini on every submission to the claude-code-plugins repo. It broke every time — quota errors, timeout, malformed JSON, the works. On 2026-05-15 I shipped a replacement and deleted the original on the same day. The replacement is structured around two contracts.

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