A stale-proof shared memory for coding agents Hivemind, a self-hosted MCP server, provides a stale-proof episodic memory for coding agents, allowing them to share learned insights across a single codebase. The system uses a conservative recall mechanism with an abstention gate and a tiered trust system where memories must be promoted through quarantine, provisional, and established stages, with only human-approved writes reaching the highest trust level. Designed for solo developers and small teams, it runs as a single Docker container with an offline embedder and offers eight tools for memory management. A stale-proof, stigmergic episodic memory for a fleet of coding agents working one codebase. Hivemind runs as a single self-hosted MCP server that every agent connects to; what one agent learns, the others can recall. It is built for solo devs and small teams — single-tenant, single-host, one SQLite store. Recall is deliberately conservative: a query is embedded, matched by dense cosine similarity, and passed through an absolute-relevance abstention gate — when the top match does not clear an absolute similarity floor, Hivemind returns nothing rather than guess. Memories enter quarantined via hive capture and become servable only once independent fleet demand or a verified change outcome promotes them provisional ; the trusted established tier is reached only by an explicit human-approved hive write . Unused memories decay on a TTL. Nothing is auto-trusted, and the store never silently migrates across schema generations. A connected agent gets exactly eight tools: | Tool | Purpose | |---|---| hive recall query | Dense recall behind the abstention gate. Returns reference context or abstains with each hit's trust , ts , polarity , kind , and anchor . | hive capture text | Record a durable insight. Lands quarantined; served only after fleet demand or a verified change outcome promotes it. | hive write text, approved by=… | Human-vouched memory served immediately as established . replaces=