Long-term memory for AI agents: local-first PKM with provenance and hybrid search.
Long-term memory for AI agents: local-first PKM with provenance and hybrid search. The tacitus mcp server wraps that behind the Model Context Protocol, so an assistant can use it through 8 defined tools rather than through you.
Tacitus is an MCP server that turns any folder of Markdown notes into an agent-native knowledge base. It gives AI agents (Claude Code, Claude Desktop, and any MCP client) three things they actually need:
Everything the assistant can do here goes through one of these:
Group — ToolsMemory — remember, recall, forgetRetrieval — search, get_note, graph_query, list_notes, properties_query*Write-back — propose_changes, commit_changes, revert, rename_note*, delete_note*, get_version*Convenience — create_note, update_note, link, tag, audit_logTemplates — list_templates*, create_from_template*Tasks — list_tasks*, toggle_task*Meta — capabilitiesThe server ships on npm as @dashiro/tacitus-mcp-server, so your MCP client can launch it on demand — there is no separate build step. Add the server block to your client's configuration, restart it, and the tools register themselves.
Among the knowledge and memory options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Tacitus's toolset — Group, Memory, Retrieval and 5 more — is a fair guide to whether it matches your workflow. It is maintained by ionasrobert; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Tacitus's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| Group | Tools |
| Memory | remember, recall, forget |
| Retrieval | search, get_note, graph_query, list_notes, properties_query* |
| Write-back | propose_changes, commit_changes, revert, rename_note*, delete_note*, get_version* |
| Convenience | create_note, update_note, link, tag, audit_log |
| Templates | list_templates*, create_from_template* |
| Tasks | list_tasks*, toggle_task* |
| Meta | capabilities |
{
"mcpServers": {
"tacitus": {
"command": "npx",
"args": ["-y", "@dashiro/tacitus-mcp-server", "/path/to/your/vault"]
}
}
}Configuration as documented by the project. Restart the client after saving.
A knowledge graph your assistant keeps between sessions — entities, relations and observations that persist.
Kill hallucinated APIs — version-accurate, up-to-date library documentation injected straight into context.
Your workspace, on speaking terms with AI — search, read and write Notion pages and databases.
A structured scratchpad for hard problems — stepwise reasoning with revisions, branches and visible logic.
Symbol-level code navigation, refactoring and memory for coding agents — the IDE brain your assistant has been missing.
Chat with your second brain — search, read and write vault notes through the Local REST API.