Version 2.5.1
Here are our Release Notes for Artemis v2.5.1
Release date: March 26, 2026
🤖 New Agents & Skills
- Code Split Agent: splits code across files, available from both the CLI and a new split version view in the UI
- Auto-Target Generation Agent: automatically generates optimisation targets using intent decomposition and multi-dimension coverage
- Build Command Generation Skill: integrated into the coding agent and project chat, with support for incremental build strategies for CMake and Rust projects
📊 Custom Metrics System
A full observability metrics system across the platform:
- Baseline and per-observation metrics with improvement percentages
- Bulk metric creation with real-time notifications
- Support for file-level and project-level metrics
- Paginated search and stats for optimisation and solution metrics
🔗 GitHub Integration
- CI Fix Agent: trigger fix-agent runs directly from failed CI check runs
🧠 Coding Agent Improvements
- Reworked spec coder with better code context and improved prompts
- Changeset coder now includes an automatic summarisation step
- PR descriptions now include richer context and skip unnecessary LLM calls where possible
🆕 New Models
- GPT-5.4 Mini and Nano
💬 Agent Sidebar & Chat
- Model picker, cancel button, and retry/continue controls in the agent sidebar
- Improved markdown rendering: tables, math expressions, code blocks with headers, and syntax highlighting
- Fixed duplicate message issues
⚙️ Settings
- New settings pages: Models, CLI, Waitlist, Discord verification, and Model preferences
- Improved runner quickstart guide
🧭 Project & Navigation
- Decluttered top menu and footer status bar
- New project metrics and project samples pages
- Breadcrumbs now truncate long titles and repo names