Product Positioning

Caldera is a social network for GitHub and Obsidian users. It transforms code repositories and note content into a visual personal homepage, letting people get to know each other through "what you've built and what you've written." The official website offers two entry points: GitHub login and the Obsidian plugin.

Confirmed Key Features

• GitHub City View: Public repositories are presented as a city, with projects corresponding to districts and repositories to buildings; visitor and commit activity is also reflected on the page. The page is periodically rebuilt based on public GitHub repository information.
• Obsidian Personal Homepage: The plugin generates a personal homepage locally from your vault, including sections such as journal, activity score, streaks, and topics, and lets you choose which notes to make public.
• AI Usage Visualization: It can read local logs from Claude Code, Codex, and others, displaying token usage by model and provider.
• Private Sharing: Any note can be end-to-end encrypted and sent to a friend, who receives it as an ordinary note in their own vault.
• Mutual Aid and Socializing: Supports adding friends, joining groups, posting requests for help and offers of help, and rewards those who provide help through a "gravity" mechanism.

Privacy and Openness

The official website states that public pages display only public repositories by default; private repositories require actively installing the GitHub App before you can choose how they are displayed, and Caldera only reads repository names, languages, and commit counts, not code content. On the Obsidian side, settings are built locally and only the generated pages are uploaded. The code is open source, and self-hosted pages or a self-built hub are supported.

Use Cases

Suited for developers, writers, and Obsidian users who want to integrate open-source projects, daily notes, and AI usage records into a shareable personal page, as well as for small communities that connect through "works and words."

Platforms and Pricing

The official website mentions that the Obsidian plugin supports Mac, Windows, Linux, iPhone, and Android, and that you can join for free. Specific paid plans are not clearly stated on the official website, and pricing information is yet to be confirmed.