Covers the transcript's behaviour: YOU/AGENT conversation rows with Markdown and collapse, failure/stopped colour semantics, badge tinting, first-prompt hoisting, the pinned tail, and the inline decision and browser rows — interactive or live only while the session is, plain text once it is not.

## Before writing SPEC.md files

Read https://raw.githubusercontent.com/brillout/sdd/refs/heads/main/sdd.md
