Open-file snapshot protocol v1

IDE companions publish one JSON file per running IDE instance in:

%LOCALAPPDATA%\Prophet\dsh-plugin-coop-with-vs\v1\instances

The schema is open-files-v1.schema.json.

Publishing rules

File name: vscode-<instanceId>.json or visualstudio-<instanceId>.json.
Write a temporary file in the same directory, then atomically replace/rename it.
Refresh updatedAt at least every 15 seconds, even when tabs do not change.
Delete the instance file on clean shutdown. Consumers expire snapshots older than 60 seconds because shutdown cleanup is best effort.
Publish only absolute paths for local, disk-backed files. Do not publish source text, credentials, virtual documents, or untitled buffers.
Deduplicate paths case-insensitively on Windows.
dirty: true means the IDE buffer may differ from the on-disk file. DSH still reads the on-disk version unless a future protocol explicitly adds buffer transfer.

Compatibility

Consumers reject unknown versions and malformed entries without rejecting healthy snapshots from other instances. Adding fields requires a new protocol version because v1 intentionally rejects additional properties.