The agent that
grows with you

• ▸ *Release Date:** September 24, 2026
• ▸ *Full curated release notes for this window ship with v0.22.0**, which will document everything from v0.21.0 onward — highlights, feature areas, and complete contributor credits. Nothing in this window is skipped.
• ▸ hermes update (git installs), or re-run the installer one-liner.
• ▸ Docker / Hermes Cloud: images build from this tag (nousresearch/hermes-agent:v2026.9.24).
• ▸ *Full changelog:** https://github.com/NousResearch/hermes-agent/compare/v2026.9.21...v2026.9.24

Hermes Agent v0.21.5 (v2026.9.24)

Release Date: September 24, 2026

> Patch release. This tag rolls up the ~460 PRs merged since v0.21.4 into a stable tagged release for downstream consumers (Docker images, Hermes Cloud, hosted deployments). Full curated notes for this window are deferred to v0.22.0.

About this release

Measured at commit f97608f178d1ffeca59860195ab7da295f7c8e5f, the window since v0.21.4 contains 1,610 non-merge commits across 4,828 changed files (+164,132 / −149,440), 460 merged PRs and 475 closed issues.

Also in the window, undocumented here on purpose: a Desktop plugin SDK wave (composer draft API, session-list and row-decoration slots, sidebar nav prefs, model-pill label providers, typed settings/skills/toolsets/profiles bridges, a sandboxed embed primitive, appearance-settings slot, and a public event bridge for plugin backends); a Simple/Advanced interface mode for Desktop; the Connectors page replacing the MCP tab, with "Connect now" for a freshly installed plugin's MCP servers and installed plugins' tools and skills going live in every open chat; onboarding that offers catalog plugins beside connectors; complete French, German and Spanish Desktop catalogs plus an RTL/LTR text direction setting; custom model entry from the composer and Settings pickers; function-key and dictation voice shortcuts; per-profile stop/start/restart under the host multiplexer and gateway.standalone to opt a profile out; the live dock showing the standing /goal and queued prompts in the CLI and TUI; a kanban design pass with a two-column ticket modal and markdown task text; webhook deliveries mirrored into the target chat session; Bot Screen on hosted -desktop images; GPT-6 Sol/Terra/Luna and Claude Opus 5.5 in the Nous and OpenRouter catalogs; an official Blender Lab integration and NVIDIA app/Broadcast plugins; a long run of hot-path performance work across config loading, the tool registry, gateway message handling and the model picker; and dozens of new community plugins in the catalog.

Full curated release notes for this window ship with v0.22.0, which will document everything from v0.21.0 onward — highlights, feature areas, and complete contributor credits. Nothing in this window is skipped.

Updating

• hermes update (git installs), or re-run the installer one-liner.


• Docker / Hermes Cloud: images build from this tag (nousresearch/hermes-agent:v2026.9.24).

Full changelog: https://github.com/NousResearch/hermes-agent/compare/v2026.9.21...v2026.9.24

Hermes Agent v0.21.4 (v2026.9.21)

Release Date: September 21, 2026

> Patch release. This tag rolls up the ~1,800 PRs merged since v0.21.3 into a stable tagged release for downstream consumers (Docker images, Hermes Cloud, hosted deployments). Full curated notes for this window are deferred to v0.22.0.

About this release

Measured at commit 4b8a8134009a8727a289bcabeb0019fedd353128, the window since v0.21.3 contains 5,071 non-merge commits across 5,169 changed files (+312,961 / −62,855), 1,812 merged PRs and 2,116 closed issues.

Also in the window, undocumented here on purpose: a host-wide gateway singleton lock with a rendezvous record, and Desktop attaching to the running host backend instead of spawning a second one; one backend-owned connector operation with a setup card on Desktop, TUI and CLI; --format stream-json structured JSONL output for the CLI; skills.auto_load pinning skills into every new session's prompt; a Desktop chat/UI font picker, one-click local engine updates, and plugin uninstall from the Plugins hub; a decline unauthorized-DM behavior for the gateway; a configurable MCP discovery connect cap (mcp.discovery_concurrency); session_search after/before bounds plus OR-relaxed recall retry; hermes sessions set-journal-mode; LTX 2.5 and Kling O3 in the video catalogs; a website page for every catalog plugin and author, with pinned-commit READMEs and added/updated sorting; a dozen new community plugins in the catalog (tailscale, ssh, shodan, terminal, rss, resetwatch, done-bell, kiwi, cognee, Octen); and a large run of profile/multiplex isolation, cron, kanban, Desktop and state.db fixes.

Full curated release notes for this window ship with v0.22.0, which will document everything from v0.21.0 onward — highlights, feature areas, and complete contributor credits. Nothing in this window is skipped.

Updating

• hermes update (git installs), or re-run the installer one-liner.


• Docker / Hermes Cloud: images build from this tag (nousresearch/hermes-agent:v2026.9.21).

Full changelog: https://github.com/NousResearch/hermes-agent/compare/v2026.9.14...v2026.9.21

Hermes Agent v0.21.3 (v2026.9.14)

Release Date: September 14, 2026

> Patch release. This tag rolls up the ~338 PRs merged since v0.21.2 into a stable tagged release for downstream consumers (Docker images, Hermes Cloud, hosted deployments). It exists so the remote-gateway sign-in fixes below reach Cloud agents, which auto-update to the newest release tag.

What this patch ships for remote Desktop / Cloud users

• Remote dashboard sessions no longer expire on refresh bursts (#110061, fixes #55712; salvage #71548 @Doud-FR, #55717 @liuhao1024). Both refresh paths on the gateway (cookie gate and the desktop's native bearer route) now coalesce concurrent requests carrying the same rotating refresh token, so a Desktop wake burst can no longer replay an already-rotated token into the Portal's reuse detection and revoke the whole session. Refresh also runs off the event loop, so a slow identity provider no longer freezes /api/status. Pairs with Portal-side NousResearch/hermes-portal#1209 (sliding 30-day idle horizon, 5-minute rotated-token grace).

Also requested for this tag

• Long-lived processes stop leaking duplicate state.db writer handles (#110934, fixes #100896 #103339; salvage #107974 @kshitijk4poor, mapping @Rroven): gateway, dashboard/Desktop backend, ACP and CLI readers attach read-only and in-process writers share the registry handle, so the N live SessionDB handles precursor stops firing on a healthy topology.

About this release

Measured at commit 9b419a2d3c2657c192008e732149d61170b32c01, the window since v0.21.2 contains 1,036 non-merge commits across 2,642 changed files (+131,690 / −37,096) and 338 merged PRs.

Also in the window, undocumented here on purpose: server→client JSON-RPC requests and a Pydantic wire-contract registry with generated TS/OpenRPC for the TUI/Desktop gateway (#110521, #110522); reasoning-effort selection on every model picker, a composer pill and per-auxiliary control in Desktop; OpenRouter OAuth PKCE login; HEIF/HEIC/AVIF image decoding; the Honcho peer-model setup rework; MCP OAuth refresh tokens bound to their issuer; a daily MCP re-auth nudge in Desktop; Wan 3.0, Kling 3.0 / Kling Image v3, MiniMax H3 Max Turbo, Gemini Omni Flash 1.1 and Meta Muse in the FAL catalogs; Slack pasted tables and the Agent Sessions API; multiplexed-profile isolation and gateway-liveness fixes; and the state.db WAL refusal on cross-VM filesystems.

Full curated release notes for this window ship with v0.22.0, which will document everything from v0.21.0 onward — highlights, feature areas, and complete contributor credits. Nothing in this window is skipped.

Updating

• hermes update (git installs), or re-run the installer one-liner.


• Docker / Hermes Cloud: images build from this tag (nousresearch/hermes-agent:v2026.9.14).

Full changelog: https://github.com/NousResearch/hermes-agent/compare/v2026.9.11...v2026.9.14