deja-vu

deja-vu is an open-source, MIT-licensed local memory tool for coding agents, maintained by vshulcz. It indexes the session transcripts that Claude Code, Codex, Cursor and dozens of other agents already write to disk, then hands relevant past work back to whichever agent is running through hooks and an MCP server. It ships as a single Go binary, with the latest release listed as v0.23.1.

What It Is

A memory layer for coding agents that treats existing transcripts as the memory, so there is no separate capture step. It parses each agent's session store in place, builds a local index, and strips credentials such as keys, tokens and PEM blocks as the index is built. Indexing and search run locally with no LLM; embeddings are used only if semantic recall is enabled.

How the Workflow Runs

After installing with the shell script, deja install --auto wires MCP recall into the agents it finds, enables session-start recall where supported, and builds the first index. Agents can then recall past work at session start, before a file is edited or a command runs, and after a command fails. Running bare deja opens a terminal search screen over every agent's history, where you can read a session, resume it in its own agent, or continue it in another agent with what it asked, decided and left open.

Commands and Outputs

The CLI includes search, wip, blame for tying files to sessions, fix and how for past errors and commands, ctx digests, handoff, sync between machines over SSH, stats --card for a shareable SVG summary, and secrets for finding credentials left in source transcripts. The MCP server exposes a single deja tool with several modes, including recall, context, blame, fix, how, orient, remember and handoff.

Privacy and Benchmarks

The docs state that nothing leaves the machine unless configured, with no account or telemetry. The author, who maintains the project, publishes benchmark results such as 97.2% R@5 on LongMemEval-S and a 17.6 s index of 19,195 sessions, and says the drivers and corpus are in the repository for re-running.