Trussfy — Smart Context for AI Coding

Stop paying for tokens your AI doesn't need. Trussfy is a VS Code extension with a bundled MCP server. It indexes your entire workspace locally, scores every chunk by relevance to your query, and feeds only the top-ranked context to the AI chat you already run inside VS Code — Claude Code, GitHub Copilot Chat, Cline, Continue.

• Per-question codebase exploration: ~96% fewer tokens
• API users: −50% to −85% on the session bill (7-layer guard) · −90% with Smart Living Context (alpha)
• Claude Pro / Max subscribers: 5-10× more queries per 5-hour limit window — same flat fee, far more work before "limit reached, try again in 4h"

What you get

1. Smart Copy (works everywhere)

Cmd/Ctrl+Shift+C packs the best-matching code into your clipboard. Paste into ChatGPT, Claude, Gemini — anywhere. No MCP needed.

2. Bundled MCP server (zero extra install)

Click Connect VS Code chats in the sidebar and Trussfy wires itself into:

• Claude Code (CLI)
• GitHub Copilot Chat (1.95+)
• Cline
• Continue

Your AI then calls the select_context, smart_grep, list_symbols, get_file, reindex tools automatically. Zero copy-paste.

3. The 7-layer guard (Claude Code)

Most MCP servers stop being used after 3-4 messages — modern LLMs forget instructions and drift back to manual Read/Grep/Glob. Trussfy stacks 7 defenses:

Layer 5 is the only enforcement layer in the industry — the AI literally cannot read source code without going through Trussfy first.

4. Smart Living Context — opt-in alpha (v0.11.0+)

The 7-layer guard above optimises codebase exploration. SLC optimises the rest of the session — the edit-loop, the multi-file refactor, the long debug grind. When enabled (trussfy.smartLivingContext = true), Trussfy:

• Caches every Read at ~/.trussfy/cache/ with metadata (hash, mtime, edit history)
• Denies redundant re-Reads of files that haven't changed on disk → conversation history stays tiny
• Hard-checks every Edit against the file's current hash → blocks stale-content edits (pure safety win)
• Auto-invalidates after Bash commands and external file changes (fs.watch)
• Exposes mcp__trussfy__get_cached(hash, lines?) for the AI to re-fetch by reference

Expected impact: −85-95% session cost on edit-heavy workflows, where the 7-layer guard alone saves ~10%. Default OFF — flip the setting in settings.json to start. See /docs#slc for details.

5. One-click Disconnect

Each project has its own ON / OFF state. The red Turn off Trussfy for this workspace button removes every Trussfy config from the current workspace (.mcp.json, .vscode/mcp.json, the Claude Code hook, the Trussfy block in your AI-instruction files). .bak backups are saved next to every modified file. User-added entries are preserved.

Installation

1. Open VS Code → Extensions (Cmd/Ctrl+Shift+X)
2. Search for Trussfy
3. Click Install
4. Click the Trussfy icon in the activity bar
5. Sign in with Google (one click)
6. Click Connect VS Code chats in the MCP card

That's it. First workspace index runs in under 200 ms.

MCP tools exposed

Multi-window / multi-project

The single rule: 1 Claude Code session = 1 project.

Privacy

• Your source code never leaves your machine through this extension. Indexing is 100% local.
• The index lives in .trussfy/ inside your workspace (SQLite).
• Sign-in only sends usage metadata (token counts, timestamps, model name, query prefix capped at 80 chars) — for billing and quota enforcement.
• No telemetry on file names or code content.

Full policy: trussfy.com/privacy

Pricing

No credit card for Free. Cancel Pro anytime.

Details: trussfy.com

Supported languages

Commands & shortcuts

Support

• Questions / bugs: contact@trussfy.com
• Response time: usually under 4 hours

License

Proprietary software. See LICENSE for full terms.

© 2026 Trussfy — All rights reserved.