[FEATURE] Show usage window reset countdown in CLI status line

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Summary

The Claude Code CLI status line shows usage percentages (e.g. 5h: 64% | 7d: 32%) but does not show when the current usage window resets. The Claude web app shows this as "Resets in 2h 16m" — the CLI has no
equivalent.

## Current behaviour

Status line displays:
ctx: 54% | 5h: 64% | 7d: 32% | $7.54

No indication of when the 5h or 7d window resets.

## Expected behaviour

ctx: 54% | 5h: 64% (resets in 1h 52m) | 7d: 32% | $7.54

Or as a separate field:
ctx: 54% | 5h: 64% | 7d: 32% | $7.54 | reset: 1h 52m

## Why

When usage is high, knowing the reset time helps decide whether to wait or continue. The web app already exposes this — the CLI should too.

## Workaround attempted

Tried to build a script that detects when 5h% drops to ~0% and starts a 5-hour countdown from that timestamp. Blocked because the 5h% value is not accessible programmatically — it is only visible in the
interactive terminal status line and not exposed via any CLI command or JSON output.

Proposed Solution

Suggestion

Either:

1. Add the reset timestamp to the status line natively
2. Expose raw usage data (tokens used, window start time) via claude --output-format=json or a claude /usage command so users can build their own tooling

Alternative Solutions

_No response_

Priority

High - Significant impact on productivity

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_