Claude of Duty by obook

This extension never knows your Claude login details.
There is no login form, and the extension never reads, stores, or sends your password or your session token.

Description
Claude of Duty is a small Firefox extension that watches your Claude plan usage and notifies you as a limit approaches, so you know it is coming before you hit it.

It reads your usage from Claude's own API using your signed-in session, so it works in the background. You do not need to keep the usage page open.

What it watches
Three limits, each with its own notification when it crosses the alert step and again when it resets:

• Current session: the rolling 5-hour window (reset shown in hours).
• All models: the weekly limit across every model (reset shown by day).
• Scoped model: the weekly limit for whichever model is currently subject to one, labelled with that model's own name. If the model changes, the label updates automatically.

The alert step defaults to 5% and can be set to 10% or 25% from the extension's preferences. When any limit crosses a step, the alert window shows all three limits together, not just the one that changed.

In the popup
- The current session row is visually highlighted, since it resets much sooner than the weekly ones.
- A trend line projects, from recent readings, either "On track for reset." or "At this rate: limit in ~Xh".
- A 7-day chart plots the session limit's history, with a dashed line at the configured alert step.
- The toolbar icon always shows the current session usage as a badge, colored green, orange, or red depending on how close it is to the limit.

How it works
- Calls GET /api/organizations/{id}/usage on claude.ai, authenticated by your session cookie. The extension never sees or stores your token.
- Finds your organization automatically from /api/organizations.
- Polls on a background timer, at browser start, and on demand from the popup.