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Capture in the moment.
Decisions evaporate fast. Cortex hooks into Claude Code so reasoning is recorded as it's spoken — not reconstructed from a commit message six months later.
Every codebase is a landscape of decisions, most of them invisible. The trade-offs that shaped the architecture, the alternatives that were considered and rejected, the constraints that pushed toward this design and away from another — all of it sits beneath the code, where no git blame can find it.
Cortex is a knowledge graph that captures decisions as they're made and lets agents query them later. Built as an MCP server and Claude Code plugin — a graph at rest, two-dimensional frames in motion.
Every line of code sits on a stack of earlier decisions. Cortex preserves the strata so you — or an agent acting on your behalf — can read down through them when you need to understand why.
Decisions evaporate fast. Cortex hooks into Claude Code so reasoning is recorded as it's spoken — not reconstructed from a commit message six months later.
Code is structured, but the why beneath it isn't. Cortex gives that layer cartography — ATTACHed structural memory plus decision walks, traversable by agents.
The right place for this is wherever the developer already is. Cortex ships as MCP. It joins the conversation — it doesn't ask for one of its own.
Install it as a Claude Code plugin, or read the source. We're listening for what to build next.
claude plugin add github:ruevu/cortex