Crate mnem_graphrag 

LLM-free GraphRAG primitives over mnem’s AdjacencyIndex.

This crate fuses two experiments onto one substrate:

• E1 (Leiden) - community provides modularity-optimising community detection producing a deterministic, content-addressable CommunityAssignment from any AdjacencyIndex (authored, KNN, or hybrid).
• E4 (Summarize) - summarize provides an extractive Centroid+MMR summarizer over community members, reusing mnem_embed_providers::Embedder.
• Gap 16 (Calibration) - calibration emits scale-free per-query score quantiles and a categorical distribution-shape label so agents can interpret dense-retrieval scores without a trained cross-embedder scaler.

Non-goals

• No LLM: summarization is extractive, returning existing sentences.
• No BM25 .
• No network, no heavy deps beyond mnem-core / mnem-embed-providers.

Determinism

Every public entry point in this crate is seeded. Given the same input and seed, two independent runs produce byte-identical output.

Re-exports

pub use calibration::K_MIN;

pub use calibration::ScoreDistribution;

pub use calibration::ShapeLabel;

pub use calibration::WILSON_WIDTH_TARGET;

pub use calibration::WILSON_Z;

pub use calibration::derive_k_min;

pub use calibration::distribution_shape;

pub use calibration::node_score_quantiles;

pub use calibration::score_quantiles;

pub use community::CommunityAssignment;

pub use community::CommunityId;

pub use community::compute_communities;

pub use confidence::K_MIN_SHAPE_GATE;

pub use confidence::RankAgreement;

pub use confidence::median_topk_margin_pct;

pub use confidence::normalized_entropy;

pub use confidence::rank_agreement;

pub use summarize::Summary;

pub use summarize::SummaryItem;

pub use summarize::summarize_community;

Modules

calibration

Score calibration - scale-free per-query interpretability for dense retrieval.

community

Leiden-style community detection over an AdjacencyIndex.

confidence

Within-query confidence signals over retrieval score distributions (Gap 05, LD-primary).

summarize

Centroid + MMR extractive community summarizer.