Shelley – a coding agent that lives in the browser

Bold Software released Shelley, an open-source, self-modifying coding agent that runs as a web page and installs via `brew install --cask boldsoftware/tap/shelley`. Shelley runs multiple concurrent conversations, each with its own model and working directory stored in a single SQLite database, and supports Anthropic, OpenAI, Gemini, and Fireworks keys plus custom OpenAI-, Anthropic-, or Gemini-compatible endpoints. The Go backend with an embedded Vue UI ships new releases on every push to `main` that passes tests, and the agent has no built-in authorization or sandboxing.

Many conversations at once Each conversation is its own agent with its own model and working directory. Run several side by side, archive them, search them. Conversations live in one SQLite database. More → https://shelley.dev/docs/conversations Web-based, mobile-friendly, multi-conversation, multi-modal, multi-model. One binary. Open source and self-modifying. brew install --cask boldsoftware/tap/shelley Shelley is a mobile-friendly, web-based, multi-conversation, multi-modal, multi-model, single-user coding agent built for but not exclusive to exe.dev https://exe.dev/ . It does not come with authorization or sandboxing: bring your own. A shell, precise patch edits, a headless browser for navigating and screenshotting, subagents, one-shot calls to other models, and inline HTML for charts and diagrams. More → https://shelley.dev/docs/tools Edits render as real diffs, and a side-by-side diff viewer shows everything that changed. Browse the git graph, comment on lines, and ask for a commit tour : an annotated walkthrough of a change, saved as a git note. More → https://shelley.dev/docs/commit-tours Anthropic, OpenAI, Gemini, and Fireworks keys from the environment, plus custom OpenAI-, Anthropic-, or Gemini-compatible endpoints. Switch models between turns. More → https://shelley.dev/docs/models Built-in skills https://shelley.dev/docs/skills plus your own shelley skill new . Connect remote MCP servers https://shelley.dev/docs/mcp shelley mcp add . Drop executable scripts in ~/.config/shelley/hooks to rewrite prompts, add slash commands, or react to turns hooks https://shelley.dev/docs/hooks . Talk instead of typing, or record your voice and screen while you point at the problem; the agent gets the transcript, the video, and timestamps to match them up. Paste screenshots straight into the chat. It’s a web page; your phone works too. Go backend, SQLite storage, the Vue UI embedded. Download it, run it, open a tab. New releases ship on every push to main that passes tests. Install → https://shelley.dev/docs/install Shelley grew out of Sketch https://github.com/boldsoftware/sketch , and unsurprisingly much of it is written by Shelley, Sketch, Claude Code, and Codex.