ctx — Context Engine

Get started in 30 seconds

Linux / macOS

curl --proto '=https' --tlsv1.2 -LsSf \
  https://github.com/JaimeJunr/context-engine/releases/latest/download/ctx-engine-installer.sh | sh
ctx install --agent claude-code

Windows (PowerShell)

irm https://github.com/JaimeJunr/context-engine/releases/latest/download/ctx-engine-installer.ps1 | iex
ctx install --agent claude-code

Cargo

cargo install ctx-engine
ctx install --agent claude-code

Reopen your Claude Code session and the agent automatically uses ctx for command compression, repo maps, semantic search and call graphs.

Why ctx?

The only Rust CLI that covers 5 competitive axes in a single 100% local binary.

Auto-rewrite hooks

Bash calls go through ctx exec automatically — git, cargo, npm, docker, kubectl, aws, terraform, linters compressed without the agent knowing.

Native MCP server

10 tools (ctx_exec, ctx_search, ctx_map, ctx_callers, ctx_trace…) exposed via stdio. Schemas auto-generated by schemars.

Repo map (BM25 + PageRank)

Curated signatures ranked by relevance with token budget binary-search. Personalized PageRank with seed dirs for high-precision context.

Call graph in 7 languages

TypeScript, Python, Ruby, Go, Rust, Java, Groovy. callers/callees/trace/impact ranked by query relevance — unique vs CodeGraph.

Local RAG search

Index docs, wikis, ADRs. Semantic search via embeddings (Ollama-compatible endpoint, optional). Works offline in lexical mode without Ollama.

100% local · zero APIs

No telemetry, no cloud calls, no accounts. Single Rust binary. MIT licensed. Linux x86/aarch64, macOS Intel/Apple Silicon, Windows x86.

Compared to the field

	ctx	RTK	CodeGraph	Context Mode	QMD
Auto-rewrite hook	✅	✅	❌	❌	❌
Native MCP server	✅	❌	✅	✅	✅
Command output compression	✅	✅	❌	✅	❌
Curated repo map (BM25+PageRank)	✅	❌	❌	❌	❌
Local RAG over docs	✅	❌	❌	partial	✅
Token budget binary search	✅	❌	❌	❌	❌
Call graph	✅	❌	✅	❌	❌
Query-ranked graph results	✅	❌	❌	❌	❌
Token budget on graph output	✅	❌	❌	❌	❌
Single Rust binary	✅	✅	❌ TS	❌ TS	❌ TS
100% local	✅	✅	✅	✅	✅

Read the detailed comparison →

What it does, concretely

ctx exec — Command compression 17 command families. git push → 'ok abc1234 main'. kubectl logs deduplicated. cargo test keeps only failures.

ctx graph — Call graph navigation callers/callees/trace/impact. Query-ranked results. Token budget. Indexed in SQLite for instant queries.

ctx map — Repo map for LLMs Signatures extracted via Tree-Sitter, ranked by BM25+PageRank, capped by token budget. Drop into any prompt.

ctx catalog — Local docs RAG Index markdown, wikis, ADRs. Search semantically (with Ollama) or lexically (without). All local.

ctx mcp — MCP server 10 tools exposed via stdio. Works with Claude Code, Cursor, opencode, any MCP-compatible client.

ctx install — Agent setup One command configures hook + MCP server in ~/.claude/settings.json. Symmetric uninstall preserves your other configs.

Backed by numbers

• 271 tests passing (228 unit + 43 integration), 0 failures
• 17 command families covered by ctx exec filters (git, cargo, npm, docker, kubectl, aws, gh, gradle, maven, pytest, tsc, eslint, ruff, mypy, go test, rubocop, terraform…)
• 7 languages in the call graph (TS, Py, Rb, Go, Rust, Java, Groovy)
• 10 MCP tools exposed via stdio
• 5 platforms supported (Linux x86/aarch64, macOS Intel/Apple Silicon, Windows x86)

Open source · MIT licensed

GitHub · crates.io · Release v0.1.0 · Changelog