ALL OPEN SOURCE

MASYV Claude Code plugins that actually work_

Tools for developers who use AI coding agents daily. Token optimization. Secret detection. Cross-agent handoff. Cost tracking. Code safety. Team memory. 3D visualization. Rust and TypeScript. No wrappers. No BS.

Manav Arya builder / open source / rust addict

GitHub @Manavarya09 npm @masyv

I build tools for developers who use AI coding agents. All open source. All Rust + TypeScript. If Claude Code is your IDE, these plugins make it better.

10
Plugins
10K+
npm Downloads
50+
GitHub Stars
8K+
Lines of Rust
DEV
OPS
AI
RELAY • COST GUARDIAN • GUARDRAIL • UI FORGE • TEAM BRAIN • CLAUDE CITY • TOKENFORGE • SECRETSCAN • ENHANCE • AI DESIGN SKILLS • 10K+ NPM DOWNLOADS • RUST + TYPESCRIPT • ALL OPEN SOURCE •  RELAY • COST GUARDIAN • GUARDRAIL • UI FORGE • TEAM BRAIN • CLAUDE CITY • TOKENFORGE • SECRETSCAN • ENHANCE • AI DESIGN SKILLS • 10K+ NPM DOWNLOADS • RUST + TYPESCRIPT • ALL OPEN SOURCE • 
Tech Stack
Rust
TypeScript
JavaScript
Tree-sitter
SQLite
ONNX
Three.js
Next.js

Projects

10 tools — sorted by impact
01

Relay

Rust 19 npm @masyv/relay
Cross-agent context handoff in <100ms

When Claude's rate limit hits at 6:20 PM and your deadline is 7 PM, Relay captures your full session context and hands it to Codex, Gemini, or any of 8 agents.

  • Full conversation capture from Claude .jsonl transcripts
  • 8 agents: Codex, Claude, Aider, Gemini, Copilot, OpenCode, Ollama, OpenAI
  • Interactive TUI with spinners and fuzzy agent picker
  • relay resume / history / diff for full lifecycle
  • Zero network calls for capture (<100ms)
GitHub npm
relay
relay handoff --to codex --deadline "7:00 PM" ⚡ R E L A Y — Cross-agent context handoff ✓ [1/3] Session captured ✓ [2/3] Handoff built ✓ [3/3] Codex launched ✅ Handed off to codex • Context restored. I can see you were fixing the WebSocket handler. What would you like me to do?
02

Cost Guardian

JavaScript 23
Know exactly what Claude is costing you

Real-time cost tracking and budget management for Claude Code. Zero setup. No Docker. No Grafana. Just install and go.

  • Real-time token + cost tracking
  • Budget limits with alerts
  • Per-session and per-project breakdown
  • Zero setup — no Docker, no Grafana
  • PostToolUse hook integration
GitHub
cost-guardian
cost-guardian status 💰 Claude Code Cost Report ───────────────────────── Session: $2.47 (1,847 tokens) Today: $8.92 (6,340 tokens) This week: $34.50 Budget: $50.00/week Remaining: $15.50 (31%) ⚠️ Budget warning at 70% usage
03

Guard­rail

TypeScript 4
The safety layer AI-generated code needs

22 rules. AST-powered auto-fix. Zero config. Works with Claude, Copilot, ChatGPT output.

  • 22 security + quality rules
  • AST-powered auto-fix (not just linting)
  • AI-specific anti-pattern detection
  • Zero config — works out of the box
  • TypeScript + JavaScript support
GitHub
guardrail
guardrail scan src/ --fix 🔍 Scanning 47 files... 🚨 12 issues found (8 fixable) CRITICAL eval() usage in handler.ts:23 HIGH SQL injection in query.ts:45 HIGH Hardcoded secret in config.ts:12 AUTO-FIX Applied 8 fixes across 5 files ✅ Clean after fixes. 4 manual reviews.
04

Team Brain

JavaScript 3
Git-native shared memory for your whole team

Conventions, decisions, and context — auto-loaded into Claude Code, Cursor, and Copilot. No server. Just git.

  • Git-native — lives in your repo as .ai/ directory
  • Auto-loaded into Claude Code, Cursor, Copilot
  • Team conventions + architecture decisions
  • Onboarding context for new developers
  • No server, no setup, just git
GitHub
team-brain
team-brain init 📁 Created .ai/ directory: .ai/conventions.md — coding standards .ai/architecture.md — system design .ai/decisions.md — ADR log 🔗 Auto-detected: Claude Code — CLAUDE.md generated Cursor — .cursorrules generated ✅ Team brain active.
05

Claude City

JavaScript 3
Your codebase as a 3D city you can fly through

Visualize your codebase as a 3D city. Files as buildings, directories as neighborhoods. Navigate your architecture in Three.js.

  • 3D city visualization with Three.js
  • Files as buildings, directories as neighborhoods
  • Height = LOC, color = language
  • Interactive camera — fly through your codebase
  • Claude Code plugin with /city command
GitHub
claude-city
/city 🏙️ Building city from 847 files... src/ ████████ 23 buildings components/ █████ 14 buildings lib/ ███ 8 buildings 🌆 City ready — open localhost:3000 Tallest: lib/engine.rs (2,385 lines)
06

Token­Forge

Rust 2 npm @masyv/tokenforge
5 compression engines. Real AST parsing. 62% avg savings.

Full-stack LLM token optimizer. 5 compression engines with real tree-sitter AST parsing. 95% savings on command output. Built-in MCP server.

  • 5 engines: code, output, conversation, JSON, MCP
  • Real tree-sitter grammars (Rust, Python, JS, TS)
  • MCP server mode (tokenforge serve)
  • Semantic diff compression
  • Lossless reversibility via SQLite + zstd
GitHub npm
tokenforge
tokenforge bench --level aggressive Engine Tokens Saved% ns/tok ──────────────────────────────────────── code:rust (AST) 762 28.0% 3124 command_output 422 95.7% 3016 json_payload 302 81.8% 3404 mcp_schema 390 61.8% 2686 Total saved: 1241 | Avg: 62.7%
07

UI Forge

TypeScript 2
Full-stack app scaffolding in one command

Build production-grade UI systems and backends in seconds. Frontend with Next.js + Tailwind. Backend with Express + Database.

  • Next.js + Tailwind frontend generation
  • Express + database backend scaffolding
  • Production-ready out of the box
  • Full-stack in one command
  • TypeScript throughout
GitHub
ui-forge
ui-forge create my-app --full-stack 📦 Scaffolding full-stack app... Frontend: Next.js 15 + Tailwind CSS Backend: Express + PostgreSQL Auth: NextAuth.js Deploy: Docker + docker-compose ✅ my-app/ ready — npm run dev
08

Secret­Scan

Rust 2 npm @masyv/secretscan
47 patterns. Blocks secrets before they hit your LLM.

Secret detector for Claude Code. Blocks API keys, tokens, and credentials from entering your LLM context window.

  • 47 patterns: Anthropic, AWS, GitHub, Stripe, Google, Slack...
  • Shannon entropy analysis for unknown secrets
  • PostToolUse hook redacts before context entry
  • Allowlist management
  • Local recovery via secretscan expand
GitHub npm
secretscan
echo "AKIAIOSFODNN7EXAMPLE" | secretscan scan 🚨 1 secret found: 🔴 [CRITICAL] AWS Access Key ID fingerprint: 94cd9210 secretscan expand 94cd9210 → AKIAIOSFODNN7EXAMPLE
09

Enhance

Rust 1 npm @masyv/enhance
AI upscaling + vectorization. Real-ESRGAN via ONNX.

AI-powered image enhancement, upscaling, and vectorization. Smart pipeline auto-detects image type.

  • AI upscaling with Real-ESRGAN (ONNX)
  • Smart pipeline routing by image type
  • SVG vectorization for logos and icons
  • Multi-format export (PNG, JPEG, WebP, SVG)
  • Rust core + Node CLI
GitHub npm
enhance
masyv-enhance input.png --upscale 4x --format webp [enhance] Detecting image type... photo [enhance] Pipeline: Real-ESRGAN 4x [enhance] Processing: 1920x1080 → 7680x4320 [enhance] Exporting: output.webp (2.3MB) [enhance] Done in 4.2s
10

AI Design Skills

HTML 1
35 design languages for consistent AI-generated UI

Structured design languages for consistent UI generation. One command. Works with any AI coding agent.

  • 35 design language presets
  • Consistent UI generation across agents
  • One command activation
  • Works with Claude, Cursor, Copilot
  • HTML + TypeScript
GitHub
ai-design-skills
ai-design-skills apply brutalist 🎨 Applied: Brutalist Design Language Typography: Space Mono, Inter Black Colors: #0a0a0a, #ff3e00, #00ff88 Borders: 4px solid, no radius Layout: Grid, harsh gaps ✅ Design tokens generated

What People / Say

This is such a real pain point. Losing 45 mins of context to a rate limit is brutal, and re-briefing another model is always where bugs get introduced.

Reddit — r/ClaudeAI

Love that you pull the JSONL transcripts and tool calls, that's the stuff that actually matters for a clean handoff.

Reddit — r/ClaudeAI

Ran into this yesterday, out of my codex tokens but had plenty of Claude to spare. Spent an hour getting Claude ready to go. This would've saved me.

u/User1542x — r/ClaudeAI

Nice! Can it go from Codex to Claude Code as well?

u/User1542x — r/ClaudeAI

Good stuff.

u/___TheArchitect — r/ClaudeAI

Community & Links

GitHub @Manavarya09

All source code. All open source. All MIT.

npm @masyv

Install any plugin: npm i @masyv/relay

Reddit u/Cheap_Brother1905

Posts, discussions, and announcements

r/ClaudeAI

Community discussion