werkrevisor/docs/prs/2026-10-09-PR#64-empty-classifier-section.md

PR#64: No Classifier Section Without Units; werkcrappit and werkprobe Choose Their Risk Categories

WARNING: This document describes only the change applied in this PR. It may already be outdated once the next PR is merged. Historic PR documentation is not maintained along with new PRs; treat it as a snapshot.

Related Links

• werkcrappit PR#46: werkcrappit chooses and tunes its risk categories.
• werkprobe PR#12: werkprobe chooses and tunes its risk categories.

The Problem

A PR without a PR document has no unit for Jev's classifier questions. The result comment still shows a section "Classifier" with "0 of 0 units passed all questions (0 PR document(s))", e.g. werkprobe PR#12 before it got its PR document. The line says nothing and makes the reader look for a problem.

The Werkbaum does not show that werkcrappit and werkprobe now choose their risk categories in their .werkrevisor.toml.

Non-Goals

• No change to the classifier questions or to the verdicts.
• No change to the risk templates.

The Scenarios

Feature: the result comment shows the classifier only when it judged something

Scenario#64.01: a PR without a PR document shows no classifier section

So that the result comment holds no line without information.

• Given the classifier is configured
• And a PR changes no PR document
• When werkrevisor writes the result comment
• Then the comment has no section "Classifier"

Verified by

• test_classifier.ClassifierFlowTest.test_no_section_without_units

Scenario#64.02: a PR with a PR document still shows the section

So that the reader sees how many units passed.

• Given the classifier is configured
• And a PR changes a PR document
• When werkrevisor writes the result comment
• Then the comment shows the section "Classifier" with the number of units that passed all questions

Verified by

• test_classifier.ClassifierFlowTest.test_docs_only_can_pass_without_llm

The Solution

• classifier.render_table gives no lines when no unit was judged, no answer was ignored and nothing was flagged.
• The Werkbaum records werkcrappit PR#46 and werkprobe PR#12: both choose jvm-spring-backend in their .werkrevisor.toml and switch off categories that cannot apply; werkcrappit adds metric_integrity, and plugin_compatibility is dropped because it did not separate.
• Version 0.30.1.