Initial core release
Happy Desktop v0.0.20 · July 29, 2026 · All releases
Projects, agent conversations, model and effort controls, files, diffs and a terminal together in a downloadable macOS app.
Current interface. Models, phone access and other features have evolved since this release.
GPT-6.1 Terra, newest models first
Happy Agent v0.4.108 · October 26, 2026 · Share this release
We've added GPT-6.1 Terra through Codex in Happy's model picker.
The picker now lists the newest generation first within each provider: every GPT-6.1 model appears above every GPT-6 model.
We've removed GPT-5.6 models from the picker. If a chat uses GPT-5.6, switch it to another model before continuing.
Stops survive restarts
Stopped conversations stay stopped after Happy Agent restarts, and your next message no longer waits behind an unwanted reply. Work interrupted by a crash still resumes.
Bots and tasks can set up MCP
Bots and tasks can configure MCP servers in their own folders, alongside the servers available across your installation and projects.
More stable inline pages
Updated artifact guidance helps agents build inline pages that keep a steady height as their content changes.
Stem cells Beta
Happy Desktop v0.0.102 · October 25, 2026 · Share this release
Start work with Create. It names itself, grows its own icon, and a focus agent files it by topic. Bigger sidebar changes arrive as proposals you can accept or keep editing.
Beta, off by default. Turn on Settings → Experimental → Stem cells. The switch enables the new sidebar, Create and the focus agent together. The focus agent's proposals need Happy Agent 0.4.107 or newer.
Why new work starts as a stem cell.
Bot face: DiceBear's Adventurer Neutral by Lisa Wischofsky, CC BY 4.0.
Updates without closing your work
Happy Desktop v0.0.95 · October 11, 2026 · Share this release
Happy Agent updates wait for the running step to be saved, restart and continue the same turn. A sidebar card follows the update while the Happy window stays open.