Free Chrome Extension

Your AI habits, in your hands.

Guardian watches the shape of your AI sessions — not the words — and gives you back the awareness the chat window took away. Everything stays on your device.

See how it works

claude.ai/chat

Session · 47 min

Can you help me rewrite this email?

Of course. Paste it in and let me know the tone you're going for.

Make it sound more confident but not aggressive

Here's a version that leads with clarity and conviction without pushing...

How it works

It watches the shape, not the words.

Guardian intercepts the signal that a message was sent — not the message itself. The text is classified locally and discarded in milliseconds. Only the pattern reaches memory.

Detect

A local fetch interceptor catches the moment you send a message to ChatGPT, Claude, Gemini, or Perplexity — before the tab even knows it happened.

No text crosses any process boundary.

Classify

A lightweight local classifier labels the message's topic (work, personal, emotional, creative) and intensity. The raw text is then discarded — permanently.

Shen typology · COM-B model

Decide

A rule engine evaluates five criteria — session duration, emotional turns, message count, frequency, time of day — and fires at most one intervention per 10 minutes.

JITAI · SDT autonomy principle

Nudge

A quiet banner appears — one line of context, one "why now" reason tied to the research, two buttons. You decide. Guardian records your choice and learns your pattern.

Progressive intensity · COM-B motivation

Reflect

Your dashboard shows the arc of your week — platforms, topics, session lengths, intervention outcomes. Export it anytime. Nothing lives anywhere else.

CAIDS-20 · SDT competence dimension

Own

Uninstall anytime. One click exports everything — sessions, topics, outcomes — as JSON you can read in your browser, no upload required.

Local-first by design · View your data

Privacy by design

Nothing leaves your machine. We mean that.

The classify-and-discard principle is a hard architectural constraint, not a policy. There is no server receiving your session data because there is no surface to receive it.

Message text is classified locally and discarded in <5ms

No account required — Guardian has no user table for you

Sessions, topics, interventions live in your device's IndexedDB

Export is a local file — no upload, no cloud sync

Uninstall leaves nothing behind

// fetch interceptor (your browser) const text = extractMessage(body);
// local classifier (your browser) const label = classify(text); // → { topic: "work", intensity: "medium" }
// text is discarded here ↓ text = null;
// only the label travels chrome.runtime.sendMessage(label);
// ✓ no text crossed any boundary // ✓ no network call was made // ✓ label stored in IndexedDB only

What it feels like

The right word, at the right moment.

Not a wall. Not a warning. A whisper from something that's been paying attention.

46-minute session

"I didn't realise how much of my thinking I'd outsourced."

Guardian surfaced the pattern. The realisation was hers.

Three emotional sessions today

"It caught the exact moment I stopped writing and started venting."

One nudge. She closed the tab. Went for a walk.

Deep work session

"I use it for code. Guardian showed me I was asking the same question twelve different ways."

He paused. Slept on it. Found the answer in the morning.