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Hermes Agent v0.15.2 Releases with Plugin Manifest Fix

Hermes Agent v0.15.2 Releases with Plugin Manifest Fix

Hermes Agent, the open-source AI agent framework from NousResearch, has shipped a minor but important update. Version 0.15.2, tagged as v2026.5.29.2, fixes a packaging oversight that could break deployments. The release addresses a single bug: plugin.yaml manifest files are now properly included in wheel and sdist distributions.

What Changed

Prior to this release, when developers installed Hermes Agent via pip or built from source, the plugin.yaml manifests—critical configuration files defining agent plugins—were missing from the distributed packages. That meant any agent relying on those manifests would fail to load its plugins. The fix, committed in 827f7f07, ensures these YAML files are shipped alongside the code. It's a small change in terms of code, but it has outsized impact on usability.

Why It Matters

For teams deploying AI agents in production, missing manifests are a silent killer. You'd install Hermes, load a plugin, and get an error that's hard to trace back to a packaging glitch. This fix eliminates that pitfall. It's not a flashy feature—no new models, no performance boosts. But reliability is what separates hobby projects from enterprise tools. Hermes Agent is used in everything from automated trading to customer support bots; a broken plugin manifest can bring an entire pipeline to a halt. This patch shows the team is paying attention to the gritty details that keep production systems humming.

Four contributors stepped up for this release, including @outsourc-e and @dparikh79. It's a reminder that even the smallest fixes often require collective effort. If you're running Hermes Agent in your stack, upgrade now. You'll save yourself a headache later.

Official Source: https://github.com/NousResearch/hermes-agent/releases/tag/v2026.5.29.2