polypack-mcp

An MCP server that exposes Polypack as persistent adaptive memory. MCP-specific tools live here; the database remains an independent dependency.

Run

pip install -e '.[polypack]'
polypack-mcp --store ./polypack-data

The server exposes eight focused tools: memory_store, memory_recall, memory_context, memory_feedback, memory_suppress, memory_supersede, memory_consolidate, and graph_query. It also publishes context, active-memory, schema, and stats resources under polypack://.

Retrieval tools return {items, metadata}. Metadata includes candidate and excluded counts, context matches, score components, fallback behavior, the retrieval version, and selection statistics. memory_context uses estimated tokens (ceil(content characters / 4), minimum one) as its token_budget. An item is never returned if it would exceed the remaining budget; budgets less than or equal to zero are rejected. Context is a soft preference: matching memories are preferred and unscoped global memories may be used as fallback. Pass strict_context: true for isolation. An empty isolated result reports reason: "no_context_match" and the searched context.

Feedback is activation feedback: useful=true reinforces a memory and useful=false provides negative retrieval feedback. Responses expose activation before and after plus whether learned weights changed. Supersession and consolidation materialize SUPERSEDES, SUPERSEDED_BY, and CONSOLIDATED_FROM graph edges.

Pass --store to open a durable Polypack directory. Without it, the server uses the in-memory reference backend, which is convenient for smoke tests.

Development

pip install -e '.[dev]'
pytest

The test suite includes an MCP client/server protocol smoke test covering tool discovery, memory storage, recall, and resource reads.

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