Preserve click activation by admitting a promised ClipboardItem write synchronously, own its preparation and write promises, and distinguish preparation from clipboard failures. Fold the title from the single readSession snapshot, preserve indentation, close unfinished assistant fences, and restore the shell.overlay props contract. Update the README pair and browser fixture inventory.
Add Copy as Markdown to the Session Header more-actions menu. A new authenticated /api/session.markdown route reads complete live-preferred history through sessionQuery.readSession and renders append-only user, assistant, and tool events as Markdown. Compaction surface replacements, reasoning, injected context, and request metadata stay out of the transcript. One plugin-wide copy operation owns the browser clipboard, with an overlay toast for success and failure.
`session[.vN].jsonl` was assembled independently by the JSONL provider
(twice), the session-log export archive, and the recorded-session fixture
helpers. `dsh-session-format` now owns `sessionFormatLogFilename` and
`parseSessionFormatLogFilename`; the three consumers append only their
compression suffix, and the migration note names the owner.
`snapshotSessionFormatJson` re-implemented the lossless JSON walk that
`dsh-util-values` already publishes as `snapshotJsonValue` + `deepFreeze`,
and the frozen v0 relationship validator carried a third structural JSON
comparison next to `deepEqualJson`. Both now delegate; the format package
reports one `is not lossless JSON` diagnostic per labelled subject instead
of ten member-specific ones, and enumerable accessors whose values survive
a JSON round trip are accepted like `JSON.stringify` accepts them.
Tianyi Cui