Callimachus

Local index & search for your AI coding-agent threads across 13 tools (Claude Code, Codex, Cursor, Gemini CLI, Qwen Code, Goose, OpenCode, Continue, Cline, Roo Code, Kilo Code, Copilot Chat, Copilot CLI), plus a provider-agnostic chat, an MCP server, a CLI, and a VS Code / Cursor extension. Your history stays on your machine.

Named for Callimachus, who built the first catalogue of the Library of Alexandria.

Download

Grab the latest signed build from Releases: macOS (.dmg, Apple Silicon), Windows (.msi or -setup.exe), or Linux (.AppImage, .deb or .rpm). The app auto-updates from there on. Prefer to build it yourself? See Develop.

macOS: drag Callimachus into Applications and open it from there before enabling the agent integration. While it runs from the disk image or a quarantined download, Settings won't register it, because that path disappears when the app quits.

Windows uninstall: the -setup.exe uninstaller removes what the app added (the /recall skill, the Claude Code, Codex, Gemini CLI, GitHub Copilot and Cursor hooks, the MCP entries for Claude Code, Codex, Cursor and Gemini CLI, and cal.exe), but the .msi uninstaller doesn't. Before removing an MSI install, click Remove for Claude Code and under Other agents in Settings → Agents (the Other agents Remove also takes out the Codex, Gemini CLI, GitHub Copilot and Cursor memory hooks), or run callimachus.exe --uninstall-integration; otherwise the hooks keep pointing at the deleted app and each agent reports a hook error at every session start.

The same release also carries standalone cal-<target> and callimachus-mcp-<target> binaries for CLI/MCP-only use, with their SHA-256 sums in SHA256SUMS. Linux builds and binaries need glibc 2.38 or newer (Ubuntu 24.04+, Debian 13+, Fedora 39+); Ubuntu 22.04, Debian 12 and RHEL 9 are too old for the bundled ONNX Runtime.

Updates: the first launch after an update upgrades the index in the background; the splash keeps animating, and on a large index this can take tens of seconds. An older build can't open an upgraded index: an older app shows "This index is from a newer Callimachus", and an older cal, callimachus-mcp or pinned npx callimachus-mcp@<version> stops with an error. Whichever of them opens the index first does the upgrade, so keep the app, the npx launcher and any standalone binaries on the same release.

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