Developers

Build on the format.

Start here

The depth pages

How your AI sees the page

SiFR is the structured snapshot your AI reads instead of raw HTML or pixels - roles, text, selectors, positions, salience. What it is, and why it's compact.

SiFR format →

Structured browser perception

The problem with screenshots and raw DOM, and what a model-readable representation of rendered page state gives your AI instead.

Read the piece →

Runtime snapshots

The series on capturing what a page actually is at runtime - state, change, and the shape of a snapshot over time.

Runtime snapshots →

Set-up guides

Connect the AI client you already use, per client. Install, sign in, paste the connection, and go.

Docs & setup →

Open source

The SiFR reference implementation is public - the format, the capture engine, and the MCP server, on GitHub.

github.com/e2llm/e2llm-sifr →