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patch_history/RETRIEX_DIAGNOSTICS_REGRESSION_FIX_README.md

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+# RetrieX Diagnostics & Regression Guard Fix
+
+Patch-only package for the current `rag-inprogress.zip` baseline.
+
+## Purpose
+
+This patch adds safer operational checks around the already stabilized configuration centralization work.
+It does not change retrieval, prompt composition, shop search, intent scoring, or vocabulary semantics.
+
+## Included changes
+
+- Extends `RetriexEffectiveConfigProvider` so the effective config dump includes the newly centralized areas:
+  - `vocabulary.yaml`
+  - `intent.yaml`
+  - `agent.yaml`
+  - `prompt.yaml`
+  - `query_enrichment.yaml`
+  - `language.yaml`
+  - effective shop/search-repair/commerce-query lists
+- Strengthens config validation for:
+  - empty list items
+  - duplicate list values
+  - invalid regex patterns
+  - protected stopword mistakes
+  - protected decimal value handling for `0,02`
+  - protected short model tokens `TH/TC/TP/TM/PH/RX`
+- Adds an offline regression guard command:
+
+```bash
+php bin/console mto:agent:regression:test
+php bin/console mto:agent:regression:test --json
+```
+
+- Enhances the summary view of the effective config dump:
+
+```bash
+php bin/console mto:agent:config:dump-effective --summary
+```
+
+## Included files
+
+```text
+src/Config/RetriexEffectiveConfigProvider.php
+src/Command/ConfigDumpEffectiveCommand.php
+src/Command/RegressionBaselineCommand.php
+RETRIEX_DIAGNOSTICS_REGRESSION_FIX_README.md
+```
+
+## After installing
+
+Clear the Symfony cache and run:
+
+```bash
+php bin/console mto:agent:config:validate
+php bin/console mto:agent:regression:test
+```
+
+Then run the known manual 1.4.2 regression prompts again.