# Session 0015.0 — Transcript

> App: vscode-cowriting-plugin
> Start: 2026-06-10T22-37 (PST)
> Type: planning-and-executing
> Status: **PLACEHOLDER — claimed at session start; finalized at session end.**
>
> This file reserves session ID 0015 for vscode-cowriting-plugin. The driver replaces this
> body with the full transcript and renames the file to its final
> SESSION-0015.0-TRANSCRIPT-2026-06-10T22-37--<end>.md form at session end.

## Launch prompt

```
Implement Feature #14 (F5 cross-rung format + round-trip) per the graduated spec vscode-cowriting-plugin-content/specs/coauthoring-cross-rung-format.md — plan just-in-time from its §7.2 slices, then execute; done = contract + schema published, unit + host E2E green (round-trip, merge, fail-safe, unknown-field preservation all exercised).

```

## 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._