Crate tessera_codegraph 

tessera-codegraph

Local semantic code graph for AI coding agents. Index a repository into SQLite + a memory-mapped snapshot; ask deterministic questions about symbols, references, blast radius, and hallucinated identifiers.

use tessera_codegraph::{Index, IndexOptions};

Index::build("./my-repo", "./my-repo/.tessera/tessera.db", IndexOptions::default())?;
let idx = Index::open("./my-repo/.tessera/tessera.db")?;
let impact = idx.impact("findById", 4)?;
for caller in impact.callers.iter().take(5) {
    println!(
        "{:5.1}  {} @ {}:{}",
        caller.criticality,
        caller.symbol.qualified_name,
        caller.symbol.path,
        caller.symbol.start_line
    );
}

The library binary tessera is also built from this crate; see the README.

Re-exports

pub use indexer::IndexMode;

pub use indexer::IndexOptions;

pub use indexer::IndexReport;

pub use types::AlternativeQuery;

pub use types::BenchQuery;

pub use types::BenchResult;

pub use types::BenchSavings;

pub use types::ContextPack;

pub use types::CriticalityBreakdown;

pub use types::DefinitionResult;

pub use types::DiffChangedSymbol;

pub use types::DiffImpactResult;

pub use types::DiffImpactedSymbol;

pub use types::ExpandResult;

pub use types::GraphEngineKind;

pub use types::ImpactCaller;

pub use types::ImpactResult;

pub use types::ImportRecord;

pub use types::ImportedByResult;

pub use types::ImportsResult;

pub use types::KindCount;

pub use types::Language;

pub use types::LanguageCount;

pub use types::OutlineResult;

pub use types::QueryMeta;

pub use types::ReferenceRecord;

pub use types::ReferencesResult;

pub use types::SearchHit;

pub use types::SearchOptions;

pub use types::SearchResult;

pub use types::Sibling;

pub use types::SiblingsResult;

pub use types::SignatureLine;

pub use types::SignatureResult;

pub use types::SnippetReferenceCheck;

pub use types::StatsResult;

pub use types::SymbolRecord;

pub use types::SymbolSuggestion;

pub use types::TestsForResult;

pub use types::TopFanout;

pub use types::ValidateResult;

pub use types::ValidateSnippetResult;

Modules

bench

Benchmark harness. Indexes a path (real or synthetic) and reports the numbers that live in the README’s perf chart. We deliberately keep this self-contained and reproducible — tessera bench is meant to be runnable by anyone evaluating Tessera.

bloom

db

engine

Graph-engine abstraction. The default backend is SQLite (the one used everywhere in the codebase). A feature-gated cozo backend mirrors the call edges into an embedded Datalog database so impact queries can be expressed as a recursive Datalog rule.

indexer

mcp

query

snapshot

types

Structs

Index

High-level handle to a Tessera index. Holds a single SQLite connection and, when present, a memory-mapped snapshot for hot-path queries.