DeepSeek Harness Releases
Track the stable npm baseline separately from the faster prerelease/source stream, then open source-backed notes for changes that materially affect DSH workflows.
On this page
The source snapshot is newer than the default published baseline. Treat alpha builds as developer-preview releases with possible breaking changes.
Published baseline
0.1.5-rc.1
Used as the default published baseline, kept separate from the faster alpha/source stream.
Latest verified source / prerelease
0.1.5-rc.2 · c291e79
Official master pointed to this snapshot when the site was verified (2026-09-11).
Recent official prereleases
These are historical release entries, not a promise that every alpha build is suitable for production. Open the official release or a source-backed note before upgrading.
Upgrade startup and session-title recovery
Fixes upgrades from 0.1.1-rc.2 or 0.1.2-alpha.3 that could prevent startup or make session-list titles disappear. The source adds cross-version projection-cache reads plus backup-and-skip salvage for invalid derived cache records.
Read source-backed notes →Parent ↔ child Agent follow-up messaging
Adds bidirectional follow-up messages through send_message, improves custom model discovery/search, reduces long-conversation rendering overhead and changes several developer-facing APIs.
Open official release →Long-conversation improvements and false-disconnect fix
Improves long-conversation navigation and rendering, fixes queued image delivery, and fixes backend stalls being mistaken for network disconnections.
Open official release →Visible connection recovery and manual reconnect
If you care about long-running Agents, remote gateways or persistent Web sessions, this is the standout alpha.2 change: connection loss becomes observable, automatic retry is visible, and users can trigger an immediate reconnect.
Read source-backed notes →
Use both npm and GitHub
Developer preview
DeepSeek Harness is moving quickly. Alpha releases can change APIs, defaults and persistence behavior, so version-sensitive guides on this site show a verified source snapshot.