[FEATURE] VS Code extension doesn't render Stop-hook systemMessage

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

Previously closed as not planned here: https://github.com/anthropics/claude-code/issues/47692

Reopening as this is preventing reporting of usage in VS Code extension within my organization.

Use case: Live usage/budget monitoring (via a cc-gateway-style proxy) that works today via statusLine in the terminal but has no equivalent surface in the VS Code extension.

Proposed Solution

Please implement https://github.com/anthropics/claude-code/issues/47692

Alternative Solutions

In the meantime, I'll keep manually appending the usage line at the end of my responses within sessions like this one, and note that it won't apply automatically to other repos/sessions until this gets fixed upstream.

Priority

High - Significant impact on productivity

Feature Category

Developer tools/SDK

Use Case Example

Live usage/budget monitoring (via a cc-gateway-style proxy) that works today via statusLine in the terminal but has no equivalent surface in the VS Code extension.

Additional Context

Claude should provide individual usage and budget monitoring for enterprises. We are unfortunately writing tools to make this possible ourselves.