Hermes-Agent Release Notes
Rose and Ada both run on the Hermes-Agent engine. This page summarizes each release so you know what changed.
It starts at v0.21.0 (August 31, 2026). For earlier versions, see the official releases page.
| Version | Date | Highlights |
|---|---|---|
| v0.21.5 (v2026.9.24) | 9/24 | Desktop plugin SDK, Simple/Advanced interface, GPT-6 and Claude Opus 5.5 in the catalogs |
| v0.21.4 (v2026.9.21) | 9/21 | One gateway per host, structured CLI output, a dozen new community plugins |
| v0.21.3 (v2026.9.14) | 9/14 | Remote sign-in no longer expires unexpectedly, no duplicate state.db writers |
| v0.21.2 (v2026.9.11) | 9/11 | state.db reliability fixes, multi-profile isolation, password-blind credential vault |
| v0.21.1 (v2026.9.7) | 9/7 | Patch release: everything since v0.21.0 |
| v0.21.0 (v2026.8.31) | 8/31 | Bot Mode, agent-to-agent messaging, cron jobs with memory, steerable subagents |
How to upgrade a mate
Mate Settings → pick a mate → Versions. For the full steps and what to expect during an upgrade, see Update and roll back versions.
Official link
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