deja-vu
deja-vu is an open-source local memory tool for coding agents, helping developers using Claude Code, Codex, and similar tools produce reusable project context, past decisions, and cross-session recall results.
Tool overview
Current judgment: deja-vu looks worth tracking as infrastructure for adding local memory and retrieval to coding agents, but the evidence is stronger for attention and concept clarity than for broad, long-term proof of reliability. GitHub shows roughly 460 stars and 24 forks, which is a heat signal, not a usability guarantee. The stronger usability evidence comes from the official repo description plus one Zhihu article discussing it as an MCP-based memory-layer attempt, but the sample is still limited.
In practice, it is not a replacement for Claude Code, Codex, or other coding agents, and it is not best understood as a general vector database or full knowledge-base product. A more accurate analogy is a shared local memory-operations layer for multiple coding agents: retroactive search, MCP recall, trust scopes, and curated notes help agents recover prior decisions, pitfalls, and project context across sessions. The output is continuity of project memory rather than direct delivery of end-user features.
On barriers and cost, the available evidence only supports that it is open source, local-first, and usable across multiple coding-agent workflows.