Show HN: Atlas – Local Dependency Graph

Atlas, a free local-first tool for Windows, maps a repository into a persistent dependency graph and evidence store that coding agents like Claude Code, Cursor, and Codex can query via MCP for cited, ranked file lookups without uploading source code. Version 1.0.5 offers 18 tools across graph, impact, and debug views, restoring memory in milliseconds across sessions.

Know what may break before the code changes. Atlas maps your repository into persistent, evidence-backed memory — so you and your coding agent Claude Code, Cursor, Codex see likely blast radius before a change, locally, across every session. Windows · Free to use · No signup required · Local-first · Your code stays on your machine 01 · Scan Atlas maps your repository. Files, symbols, imports and callers — resolved into a dependency graph and an evidence store. Entirely on your machine. - resolving files - resolving symbols - resolving imports - building relationships 02 · Memory Memory that survives across sessions. The map is written to disk and validated against the live repo before reuse. A fresh agent session restores it in milliseconds — no re-exploration. 03 · Retrieval Your agent asks; Atlas answers with citations. Claude Code, Cursor and Codex request context over MCP. Atlas returns the exact files — cited, ranked, with the reason each was selected. No model in the loop; deterministic lookups. 04 · Persistent memory Give your coding agent a persistent understanding of your project. Windows · v1.0.5 · MCP · 18 tools · no signup Capabilities Read your codebase as a graph. Three views of the same indexed repository, each grounded in cited files. No model in the retrieval loop — deterministic lookups against the local index. - 01 Graph Where behavior lives, why a module matters, which files are involved — read straight off the dependency graph built from your local index. - 02 Impact The files a change is likely to affect and the dependency paths between them, before you touch a subsystem. - 03 Debug Start from an error or symptom; Atlas parses the traceback to repo files and symbol spans and returns an investigation path. Integrations Built for the agents you already use. All integrations /integrations { "mcpServers": { "atlas": { "command": "Atlas.exe", "args": "--mcp" } } } The same local index serves every agent — your source never leaves the machine. Exact per-client setup is in the docs /docs . Proof Measured, not marketed. Methodology & limits /benchmarks Self-measured on one Windows machine against a reference repository, not a random OSS sample. Every number has a reproducible harness in the repo. Local-first Your repo is indexed on your machine. Atlas scans local files, builds a repository map, and returns cited answers from that local index. It does not upload your repository to a hosted analysis service. Do I need an account to download Atlas? No. Download the Windows installer and start locally — there's a guest mode with no signup. Does Atlas replace my AI coding agent? No. Atlas gives Claude Code, Cursor, and Codex a persistent, cited memory of your repository that they can use. Does Atlas upload my source code? No. Repository indexing runs on your machine. You decide what context to send to an agent. How is this different from repeated file search? Atlas builds a dependency graph + evidence store once and restores it in milliseconds across sessions, returning ranked, cited files — not a fresh grep each time.