Ever wondered where your tokens go when you use Claude Code? Spoiler: it's mostly tool definitions you're not even using. Jannal is a transparent proxy that sits between your AI tools and the Anthropic API. One command, zero config: npx @buzzie-ai/jannal What you get: - A gorgeous real-time inspector showing exactly how your context window is sliced up — system prompt, tools, messages, tool results, all visualized as a color-coded bar - Per-turn cost tracking with actual Anthropic pricing (yes, Opus hurts, we know) - Tool filtering — the killer feature. Running Claude Code with 40 MCP tools but only need 5? Create a profile, strip the rest, save tokens and money. Your wallet will thank you. - Accurate token counting via Anthropic's own count_tokens API — not vibes-based estimation - Session export to JSON/CSV for the data nerds among us The nerdy details: It's a ~300KB npm package with ONE runtime dependency (ws). No frameworks. No build step to use. Vanilla JS that would make a minimalist weep with joy. Your API key passes through in headers — never stored, never logged. Everything runs on your machine. Built this because I was bleeding tokens on Claude Code sessions and had no idea where they were going. Turns out 40k tokens of tool definitions per request adds up fast when you have a bunch of MCP servers connected. MIT licensed. Two dependencies. The way software should be. GitHub: https://github.com/Buzzie-AI/jannal

Jannal - Your Context Window Manager

See what's eating your context window. Then fix it.

See what's eating your context window. Then fix it.