SigMap — VS Code Extension

Zero-dependency AI context engine for VS Code, Cursor, and VSCodium

85.6% retrieval hit@5 · 96.8% token reduction · 33 languages · Zero npm deps

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What is SigMap?

SigMap extracts a compact signature map of your entire codebase — function names, class hierarchies, exported types, interfaces — and writes it to .github/copilot-instructions.md automatically.

Every AI coding assistant (GitHub Copilot, Claude, Cursor, Windsurf, Gemini, Codex) reads that file as its first-message context. Without it, the AI starts knowing nothing about your project. With SigMap, it starts with everything.

Before SigMap: "I don't know your codebase — can you share some files?"
After SigMap:  "I can see your AuthService, UserRepository, 47 API routes…"

A 50,000-line TypeScript monorepo → ~3,800 tokens of pure signatures — a 96.8% average reduction across 18 real repos.

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What's new in v4.2–v4.4

• sigmap_query language model tool (v4.3) — Copilot agent mode calls SigMap's ranked retrieval automatically; reference it in chat as #sigmap
• One-click MCP registration (v4.3) — the SigMap MCP server registers via VS Code's MCP provider API, no mcp.json editing
• Multi-root workspaces (v4.4) — the active editor's folder drives the status bar, commands, and decorations
• In-editor query (v4.2) — SigMap: Query Context shows ranked files in a QuickPick
• Hardened core loop (v4.2.1) — cached command resolution, throttled health probes, honest fallback grades, regenerate failure feedback
• Compatible with SigMap CLI v8.x: 33 languages, 20 MCP tools

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Features

Live health grade in the status bar

Grade	Status bar	Meaning
A	sm: ✔ A 2h ago	Fresh — AI has full context
B	sm: ℹ B 6h ago	Good
C	sm: ⚠ C 1d ago	Stale — regenerate soon
D	sm: ✖ D 3d ago	Very stale — regenerate now

Click the status bar item for instant regeneration.

Other features

• Auto-regeneration — checks on startup and every 60 seconds
• Stale notifications — pop-up with one-click Regenerate after 24 h
• Secret scanning — AWS keys, tokens, DB strings auto-redacted before writing
• MCP server — 20 tools exposed over stdio JSON-RPC for Claude / Cursor / Copilot
• One-command context — SigMap: Regenerate Context from the Command Palette

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Installation

VS Code Marketplace (recommended)

Search "SigMap" in the Extensions panel, or:

ext install manojmallick.sigmap

Open VSX (VSCodium / Gitpod / Windsurf)

open-vsx.org/extension/manojmallick/sigmap

Manual (.vsix)

Download sigmap-X.Y.Z.vsix from Releases, then:

Extensions: Install from VSIX…

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Quick start

# 1. Install the CLI
npm install -g sigmap

# 2. In VS Code: Ctrl+Shift+P → SigMap: Regenerate Context
# Or run directly:
npx sigmap

Then use the full workflow:

sigmap ask "where is auth handled?"   # query-focused context
sigmap validate                        # check coverage
sigmap judge                           # score answer groundedness
sigmap --watch                         # auto-regenerate on save

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Requirements

Requirement	Details
VS Code	1.85.0 or higher
Node.js	18 or higher
SigMap CLI	npm install -g sigmap · npm install sigmap · npx sigmap · or standalone binary

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29 Language support

TypeScript · JavaScript · Python · Go · Rust · Java · C# · C/C++ · Ruby · PHP · Swift · Dart · Kotlin · Scala · Vue · Svelte · CSS/SCSS · GraphQL · SQL · Terraform · Protobuf · Markdown · TOML · XML · Properties · Dockerfile · and more.

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Commands

Command	Description
SigMap: Regenerate Context	Run sigmap in your workspace root
SigMap: Open Context File	Open .github/copilot-instructions.md

CLI reference

sigmap                    # generate once
sigmap ask "<query>"      # ranked context for a specific task
sigmap validate           # check coverage health
sigmap judge              # groundedness score for an AI answer
sigmap --watch            # auto-regenerate on file changes
sigmap --health           # 0–100 health score
sigmap --mcp              # start MCP server (20 tools)
sigmap --diff             # context for changed files only

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MCP server (20 tools)

Works with Claude Code, Cursor, and Copilot agent mode via sigmap --mcp (registered with one click by this extension). Key tools:

以上为 README 的开头部分。其余内容请阅读原文。 查看完整 README ↗