# Hermes Agent v0.5.0: /model slash command removed, Hugging Face provider, supply chain audit

> The `/model` slash command is removed from both CLI and gateway in favour of the `hermes model` subcommand — an interactive workflow break. Also adds Hugging Face as a first-class provider, drops the compromised litellm dependency, and replaces the hardcoded 16K Anthropic output cap with per-model native limits.

| | |
|---|---|
| **Tool** | Hermes Agent |
| **Version** | v2026.3.28 |
| **Kind** | release |
| **Published** | 2026-03-28 |
| **Observed** | 2026-08-11 |
| **Significance** | 3/5 |
| **Breaking** | yes |
| **Categories** | breaking, deprecation, feature, security, model-support, fix |

## What changed


- Breaking: `/model` slash command removed from CLI and gateway; use the `hermes model` subcommand instead
- Hugging Face Inference API as a first-class provider: auth, setup wizard, curated agentic model picker mapped to OpenRouter analogues, live `/models` probe (skipped for providers with 8+ curated models)
- Nous Portal expanded to 400+ models through a single provider endpoint
- Anthropic output limits: per-model native caps (128K Opus 4.6, 64K Sonnet 4.6) replace a hardcoded 16K `max_tokens`, fixing truncated responses and thinking-budget exhaustion on the direct API; useless continuation retries now skipped when reasoning consumes all output tokens
- Supply chain: compromised `litellm` dependency removed, dependency version ranges pinned, `uv.lock` regenerated with hashes, CI workflow scanning PRs for supply-chain attack patterns, CVE bumps
- Telegram Private Chat Topics with per-topic skill binding for isolated project workflows
- Native Modal SDK backend replaces the swe-rex dependency, eliminating tunnels
- Plugin lifecycle hooks now fire: `pre_llm_call`, `post_llm_call`, `on_session_start`, `on_session_end`
- `GPT_TOOL_USE_GUIDANCE` stops GPT models describing intended actions instead of calling tools; stale budget warnings stripped from history
- Nix flake with uv2nix build and a NixOS module with persistent container mode
- Provider fixes: `custom` provider no longer remapped to `openrouter`, Alibaba default endpoint corrected, MiniMax `/v1`→`/anthropic` auto-correction overridable, OAuth token refresh migrated to `platform.claude.com`
- Retry, fallback, and compression lifecycle events now surface to the user


## Sources

- [github_release](https://github.com/NousResearch/hermes-agent/releases/tag/v2026.3.28) — retrieved 2026-08-11

## Community

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and never blended._

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Canonical: https://changelogs.info/hermes-agent/v2026-3-28
Entity: https://changelogs.info/hermes-agent
Event ID: `evt_2026-03-28_hermes-agent_v2026-3-28`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.