v2.21.0

Added

• Registry skills content store and manifest for skill discovery
• Config schema exposed through ACP
• Checkpointer engine state model, owner union, and pending hunks

Changed

• [Breaking — hooks] Hooks graduated from experimental; hooks.toml is now stable. Every hook type is renamed: post_agent_turn → post_agent, before_tool → pre_tool, after_tool → post_tool (the hook_event_name payload field is renamed to match). Update existing hooks.toml files accordingly.
• @file mentions now inject as read_file tool calls
• Telemetry routed through client-side redaction
• Models field migration from list to dict
• VibeConfig cutover prep with persisted-config read and orchestrator SSL parity
• Reduced feedback survey frequency for users who already responded

Fixed

• Duplicate model aliases deduplicated instead of failing config load
• UTF-8 BOM stripped in decode_safe
• UTF-8 BOM stripped from SKILL.md before parsing frontmatter
• MCP server connection errors now surface in the TUI
• MCP discovery failures now surface in ACP sessions
• stdin content no longer discarded when /dev/tty is unavailable
• GitPython import deferred off the ACP startup path
• @file mention suggestions stretched to full width
• Blank line removed between approval options
• Connector tool permission content scrolls instead of cropping
• ConfigOrchestrator gained an explicit copy() for forking

Removed

• enable_experimental_hooks config flag (and VIBE_ENABLE_EXPERIMENTAL_HOOKS env var); hooks now load unconditionally when declared