v0.328.3 - A page for Mistral Vibe says what does not work and how to get the contract there

2026-10-21. Mycelium had pages for Codex, opencode and Cursor, and none for Mistral Vibe, though the README
points at a Vibe run. Measured on Vibe 3.0.0 with a local model: installed the way Vibe's docs describe, Mycelium
loads nothing, because the plugin folder carries both a Claude Code and a Codex manifest and Vibe drops a plugin
with two. The new docs/integrations/vibe.md says so, and gives the steps that were measured: remove the Codex
manifest from your copy and every skill but ping, a smoke test, loads. It states the limits plainly. Vibe has no session-start
hook, so the operating contract is not loaded at the start of a session. Vibe 3.0 runs no hook a plugin ships, so
the gates do not run. Plugin knowledge did not reach the model. It names the workaround for the contract, the
AGENTS.md contract copy: the contract file appended to the project's AGENTS.md with its plugin-path placeholders
filled in. With the full contract, the whole text reached the model's input and the model answered from its last
section. docs/install-paths.md links the page.

Alternatives not taken. Shipping a native Vibe manifest and a hooks translator in this release: both put new
code in the plugin, and the native manifest needs checking against Codex first, which also reads that format.
Telling readers to use the user-level ~/.vibe/AGENTS.md: it was measured to work, but it puts Mycelium's rules
into every project, so the page prefers the project file and says why.