Hermes Agent v0.21.1 (v2026.9.7)

Release Date: September 7, 2026

Patch release. This tag rolls up current main since v0.21.0 for tagged deployments and downstream consumers.

About this release

Measured at commit 6178e9f4eed8d99f4fc550add939d58c7bed6206, the window since v0.21.0 contains 5,139 non-merge commits across 4,364 changed files (+601,014 / −768,419). GitHub reports 632 merged PRs in the release window at preparation time. These figures exclude the release-version commit.

The rollup includes the codebase modularization, file-operation and startup performance work, provider and model updates, desktop session controls and browser annotations, MCP authorization improvements, cron scheduling and delivery fixes, and delegation reliability improvements. This patch does not attempt to enumerate or announce every feature in the window.

Full curated release notes for this window will ship with v0.22.0, covering everything since v0.21.0, including the intervening patch releases, feature details, and complete contributor credits.

Updating

• Existing install: hermes update
• Fresh install: curl -fsSL https://raw.githubusercontent.com/NousResearch/hermes-agent/main/scripts/install.sh | bash
• Managed deployments should update through their deployment tooling using the new tag.

Full Changelog: v2026.8.31...v2026.9.7