Engram

A local structural code graph and context toolkit for AI coding agents. Engram indexes source entities, Git relationships and selected project memory, then exposes focused context through a CLI, agent hooks, MCP and an authenticated local dashboard.

Use it to find relevant code before reading full files, inspect relationships and carry recorded mistakes into a later session. Read the source returned by a query before making a behavioral claim: graph retrieval is an aid to investigation.

Quickstart

The inspected package is engramx 4.5.0 and requires Node >=20. This source-build example is source-inspected, not executed; it does not assume a currently published package or extension version.

git clone https://github.com/NickCirv/engram.git
cd engram
git checkout 9fa2a4b74ca8e66560d74d1255c16c43157d32bd
npm install --ignore-scripts
npm run build
export ENGRAM_NO_UPDATE_CHECK=1
node dist/cli.js init ../your-project --no-hook
node dist/cli.js query "authentication" --project ../your-project --budget 2000
node dist/cli.js stats --project ../your-project

Replace ../your-project with a codebase you can inspect. Indexing writes the project's .engram/ graph. The --no-hook flag matters: the default CLI init also installs a Sentinel hook. Start with the graph, examine the output, then decide which integration to enable. The build includes grammar bundling; inspect package scripts and dependencies before installation.

The query returns matching graph entities and an estimated token count, or a no-matching-nodes message. Counts depend on the indexed project; no benchmark output is fabricated here.

Related MCP server: sourcebook

What is implemented

These entry points are declared in the pinned CLI. Consult each command's help before a write operation. Generators, hook installers, cache/database commands and plugin installation can modify local state.

Architecture

Source miners extract entities, references, Git co-change and selected mistake/session information. The graph store persists project-local SQLite using sql.js. Queries traverse the graph and render bounded context. The provider resolver combines built-in sources and optional plugins/MCP providers; integrations can add external processes and network access.

The architecture and integration guide maps these paths, documents HTTP authentication and gives a local MCP configuration. Existing design records, release notes, integration documents and the ECP draft remain linked in the documentation inventory. They retain historical context and are not all certified against this revision.

Privacy and operational boundaries

The core graph is local, but the entire system is not guaranteed to be network-free. The CLI has npm update checks, Context7 can call an external wrapper, and configured MCP/plugin providers can execute their own processes. ENGRAM_NO_UPDATE_CHECK=1 disables the update-check path; it does not disable every optional integration. Review configured providers and the agent that receives graph output.

The HTTP server binds to 127.0.0.1, validates Host/Origin and requires a bearer token or dashboard cookie for protected routes. It resolves a token from ENGRAM_API_TOKEN or a local token file. Keep that token private and retain the existing security policy.

Limits and measurement

Structural context size, estimated token reductions, session replay and actual provider billing answer different questions. A smaller packet does not by itself demonstrate equal answer quality or a lower bill. Reproduce the included benchmarks on your own representative workload and track correctness alongside cost. This documentation review did not run a build, test suite, benchmark or agent session.

Development

npm run build
npm run lint
npm test -- --run

The repository contains unit and integration test sources for graph storage, providers, hooks, HTTP security and other modules. Their presence is evidence of test coverage intent; results at this revision remain unverified here. See the preserved contribution guide before changing behavior.

License and author

Apache-2.0 license. The ECP specification carries its own attribution and licensing in its source document; this rewrite does not alter either.

Nicholas Ashkar · Applied AI, systems and consulting.

User guides

User manual covers setup, skills, troubleshooting and removal. Sentinel explains current hook behavior and guard modes. Tool authors can use the integration guide.