v4.22.3 v2026.9.14
NousResearch/hermes-agentSep 14, 2026 → Sep 14, 20260 days between releases
What's New
Patch release adds HEIF/HEIC support and fixes session expiration bugs in remote deployments
New Features
- Desktop now supports decoding HEIF/HEIC/AVIF image formats
- OpenRouter OAuth PKCE login is now supported
- JSON-RPC server-to-client requests and Pydantic wire-contract registry are added
- Reasoning effort selection controls are added to model pickers and composer pills
- Support for Slack pasted tables and the Agent Sessions API
Improvements
- Identity provider latency is reduced by offloading refresh operations to the event loop
- Multiplexed-profile isolation and gateway-liveness improvements
- Gateway, dashboard, and CLI readers now share registry handles to prevent leaks
Bug Fixes
- Remote dashboard sessions no longer expire on refresh bursts due to concurrent token rotation issues
- Long-lived processes and gateway components stop leaking duplicate state.db writer handles
Upgrade Notes
Ensure your Desktop client supports the new HEIF/HEIC/AVIF image formats and OpenRouter OAuth PKCE login. The session expiration fix is automatic, but multiplexed-profile isolation may require configuration updates for existing deployments.
The Two Releases
v4.22.3
Sep 14, 2026· 1 month ago
This release addresses a security vulnerability in the `path-to-regexp` dependency and introduces a new feature for conditional revalidation of QUERY requests. It also includes updates to the `qs` library and improvements to the CI pipeline.
Full release notesHermes Agent v0.21.3 (v2026.9.14)
Sep 14, 2026· 1 month ago
This is a patch release (v0.21.3) that stabilizes remote Desktop and Cloud deployments by fixing session expiration bugs related to refresh token rotation and resolving state database handle leaks in long-running processes.
Full release notes