Hermes Agent v0.21.2 (v2026.9.11)
Hermes Agent v0.21.2 (v2026.9.11) — The state.db Patch Release
Patch release. v0.21.0 shipped a large rewrite of the session store's connection handling, and for some installs it made `state.db` fragile: second writers cancelling each other's locks, healthy databases reported as corrupt, one bad row killing `sessions list`. This release closes that class and rolls up everything else that landed on `main` in the four days since v0.21.1.
About this release
Measured at commit `04dd80a977f40b05e5b2054111747af07a61886a`, the window since v0.21.1 contains 947 non-merge commits across 1,869 changed files (+182,504 / −15,564) and 312 merged PRs. 140 contributors appear in commits, co-author trailers, or salvage credits.
✨ Highlights
state.db reliability campaign (six PRs, 44 issues closed)
If your `state.db` broke after 0.21.0, this is the release for you. Six PRs fix the root causes rather than the symptoms:
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Full release notes: https://github.com/NousResearch/hermes-agent/releases/tag/v2026.9.11