[idea] Native support for Mistral Vibe agent detection and state reporting

[emirbelkahia]

Problem

Mistral Vibe (vibe CLI, https://github.com/mistralai/mistral-vibe) is not recognized as an agent by Herdr. Panes running Vibe show up as unknown — no idle/working/blocked state in the sidebar, no session restore after a server restart, and no way to use herdr agent wait, herdr agent prompt, or the socket API to coordinate with Vibe instances.

What is Mistral Vibe

Mistral AI is a French AI company building open-weight and commercial LLMs (Mistral Large, Devstral, etc.). Vibe is their terminal-native coding agent — a Rust-based TUI similar in shape to Claude Code or Codex. It's open source (Apache 2.0) and gaining traction as an alternative for developers who want a European, open-source option.

Context

Two PRs were opened to add Vibe support but were closed (unsolicited implementation PRs are not accepted per CONTRIBUTING.md):

• feat: add mistral vibe agent integration #2226 (Aug 2026, @sfroment) — full integration: Agent::Vibe variant, vibe.toml manifest, session restore via post_agent hook
• feat: add mistral vibe integration for state reports and session restore #4796 (Sep 2026, @matapatos) — state reports + session restore integration

Both were closed without a maintainer picking them up. No Discussion exists yet to formally request this feature.

Requested change

Add native support for Mistral Vibe as a first-class agent:

1. Process detection — recognize the vibe executable as Agent::Vibe
2. Screen detection manifest — src/detect/manifests/vibe.toml with rules for idle (prompt), working (spinner/thinking), and blocked (permission/approval prompts)
3. Integration (optional but ideal) — hooks or socket-based state reporting via pane.report_agent, plus session identity for restore after server restart

Workaround today

HERDR_AGENT=claude vibe approximates state tracking by borrowing Claude's manifest, but detection is inaccurate because Vibe's TUI layout differs (different prompt shape, spinner glyphs, and permission dialogs).

Links

• Vibe CLI: https://github.com/mistralai/mistral-vibe
• Vibe has a post_agent hook system and emits OSC title sequences — both could feed state reporting

[VerticalHeretic]

There are like 3 discussions about this already:

• Feature request: Add Mistral Vibe CLI as a supported agent #4754
• Add Mistral Vibe as a supported agent #1883
• Add the integration with Mistral Vibe cli #883

But agreed it would be very nice ;) but I think we should upvote only one of those

[emirbelkahia]

Thanks for the pointers, I missed those! I'm new to contributing, so I'll close this one as a duplicate and upvote #883 instead.

[VerticalHeretic]

No problem @emirbelkahia 👍🏻 thanks!