mistralai/mistral-vibe v2.15.0 on GitHub

[Experimental] before_tool and after_tool hooks: shell scripts declared in hooks.toml that fire around every tool call; hooks can deny the call, rewrite tool inputs, or append context to the output — enable with enable_experimental_hooks = true
Message queue: messages typed while the agent or a !bash command is running are queued and shown above the input; Esc pauses the queue, Ctrl+C drops the last queued message (LIFO), Enter flushes the queue when paused
Tool result output is now collapsed by default to keep responses scannable
Common read-only shell commands (ls, cat, pwd, etc.) are allowed without approval by default
Session deletion available directly from the resume picker
[mcp_servers.auth] block in config for per-server MCP authentication
Collapsed web tool output now shows the URL and search query at a glance
max_turns support exposed over ACP via set_config_option

Compaction now re-injects prior user messages so the agent retains the original task goals across context resets
[Breaking — experimental hooks] post_agent_turn retries no longer use exit code 2; hooks must now exit 0 and return {"decision": "deny", "reason": "..."} on stdout to trigger a retry — exit code 2 is treated as a failure
Model refusal stop reason is now surfaced to the user instead of stopping silently

CLI UI no longer goes blank during app switches
User messages are preserved correctly across repeated compactions
Non-UTF-8 input is handled gracefully across all CLI surfaces
--resume now shows history when launched from a dangerous directory
Startup no longer crashes in unowned folders or when a git ancestor is unreadable
Plain-string answers from web_search are handled without crashing
NaN SGR mouse reports no longer leak into the chat input