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+---
+name: "Server-side text normalization for chat message line breaks"
+---
+
+# Story 427: Server-side text normalization for chat message line breaks
+
+## User Story
+
+As a user reading bot messages in Matrix, I want single newlines between sentences to render correctly, so that messages don't show up with words joined together like "sentence one.Sentence two".
+
+## Acceptance Criteria
+
+- [ ] Add a text normalization step before markdown-to-HTML conversion in the Matrix transport that converts single newlines between non-empty prose lines into double newlines
+- [ ] Preserve intentional single-newline formatting in bullet lists, headings, table rows, and code fences
+- [ ] Apply the same normalization in WhatsApp and Slack transports
+- [ ] Unit tests covering prose paragraphs, bullet lists, code blocks, and mixed content
+
+## Out of Scope
+
+- TBD