# Session 0020.0 — Transcript

> App: vscode-cowriting-plugin
> Start: 2026-06-11T08-19 (PST)
> Type: brainstorming
> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
>
> This file reserves session ID 0020 for vscode-cowriting-plugin. The driver replaces this
> body with the full transcript and renames the file to its final
> SESSION-0020.0-TRANSCRIPT-2026-06-11T08-19--<end>.md form at session end.

## Launch prompt

```
Brainstorming: explore F7 (rendered track-changes markdown preview, baseline-aware, full mermaid) and write its Solution Design. Anchor Feature #21; deferred mermaid intra-diagram diffing #22. Builds on F6 baseline (#17/#19). Locked: custom webview; markdown-it + mermaid + jsdiff deps; block-level diff + atomic mermaid whole-diagram changed badge.

```

## Deferred decisions

_Autonomous-mode low-confidence calls the driver made and would have
liked operator input on. Appended as the session runs; surfaced at
finalize. Empty if none._