tl;dr: Hister is a self-hosted, private search engine that full-text indexes web pages you visit (via a Firefox/Chrome extension) and local files, letting you search them from a web UI, terminal, or AI assistant via MCP. It runs locally with no telemetry or mandatory cloud, supports field filters, wildcards, and optional semantic search through a configurable embeddings endpoint. Written in Go and licensed AGPLv3, it's installable via binary, Homebrew, Docker, or Nix.