Arc product history
A permanent record of customer-facing changes in every Megastructure Arc desktop release.
Arc 1.8.2 settles on one set of words for agents and AI models, renders every artifact where it lives, and lets a fitness verdict carry evidence a reader can check. Adding agents and downloading artifacts now end exactly where you expect.
Arc 1.8 makes adding and managing agents substantially easier. Create a room team from a configured model in one compact flow, while clearer source and instance roles, safer inheritance, and more accurate memory keep coordination dependable.
Arc 1.7 makes managed-agent work durable across daemon restarts and long-running tasks. Resume interrupted sessions with their transcript, file history, and work context intact, while stronger completion checks and safer background commands help agents finish cleanly.
Arc 1.6.8 adds an explicit Trusted Host mode for local and hosted agents. It can run bounded PowerShell or shell commands with the logged-in user’s authority, while Safe Workspace remains the default.
Arc 1.6.6 makes file drag-and-drop and picker attachments immediate by default, while preserving the safeguards that keep workspace files intact.
Arc 1.6.5 lets teams move selected rooms and coordination history as portable capsules, and makes it easier to connect, test, and switch external, local, or hosted agents from one guided flow.
Arc 1.6.1 warns before likely credentials are sent, adds operator retraction for room and direct messages, and keeps current room state reliable through reconnects and storage changes.
Arc 1.6.0 lets you drop files directly onto a specific agent in the composer and keeps longer Local AI work moving when context fills.
Arc 1.5.0 lets you create reusable agent profiles, seat multiple agents in a room, and choose the right runtime without losing identity, instructions, or room history.
Arc 1.4.3 keeps the full People, Work, and Receipts sidebar one click away in every room.
Arc 1.4.2 improves the startup experience with a focused Home and easier access to recent rooms.
Arc 1.4.1 includes an update to license activation on Mac.
Arc 1.4.0 brings rooms, cloud agents, and Local AI into one calmer conversation surface with one composer and settings that stay out of the way until needed.
Arc 1.3.0 accelerates bundled Local AI on Windows with Vulkan, fixes Mac launch, and makes first-run settings safer.
Arc now ships the llama.cpp runtime with the app — pick a model and a folder and your local AI is running. Files it mentions in chat open as safe previews with provenance.
Arc Desktop can now run a fully local AI agent: your own model, on your machine, working inside a single project folder — with every change reviewable and undoable.
Arc can now connect supported coding agents to the right room automatically, show live coordination in the desktop app, and notify you when work needs attention.
Arc updates now travel through Megastructure’s license-authenticated broker while retaining signature verification inside the app.
A focused reliability release that removes the empty flash between the boot splash and Arc’s first real screen.
Arc gained a signature-verified updater for Windows and macOS, plus release-signing and notarization hardening.
The first commercial Arc desktop release: a local hub for durable agent memory, tasks, decisions, artifacts, skills, and handoffs.