Stele

Stele is a hosted project memory built by Serkan Yersen that lets AI coding agents share one record of what a project has decided, tried, and is working on. Agents read the record at the start of a session and write back as they work. It is currently in open beta and connects to Claude Code, Cursor, Codex, and any MCP-compatible client.

What It Is

Stele is a hosted graph of knowledge (decisions, lessons, risks, goals), tasks, and components, linked together and addressable by stable IDs such as TASK-12 or KNOW-4. Agents reach it over MCP or through a local plugin and CLI. Instead of each session starting cold, an agent pulls relevant history into context and files what it learns afterward.

How the Workflow Runs

Setup is an installed CLI (macOS, Linux, and Windows through WSL), signing in to create an account, and running /stele:start inside the agent to build the first record. After that, context is recalled automatically in each session. Agents claim tasks atomically so two sessions do not start the same work, and leave handoff notes when a session ends mid-flight. An Operator reference loop pulls open tasks, plans them, executes inline or in isolated worktrees, verifies results, and reports back.

Keeping the Record True

The site describes a graph that flags drifted entries for review, retires reversed decisions and resolved risks, surfaces duplicates for merging, and lets agents re-verify facts against live code. When a proposed change would repeat a past mistake, the record surfaces the earlier attempt before work begins. An assistant answers questions about project state from the live graph, and a backfill step can seed the record from an existing repo.

Data and Access

The vendor states that project graphs are private to members unless published, source code stays on the user's machine, data is not sold, and it is not used for model training without opt-in. Users can export or delete their data. Public projects can be browsed without an account, and Stele can also be added to ChatGPT from its app directory. An open, SQLite-backed self-hosted version is described as planned.