Feature Request: Add option to disable/limit git status auto-loading for token efficiency

Problem

Claude Code automatically loads git status output into every session context. For projects with large working directories (>100 modified files), this causes catastrophic token bloat.

Reproduction

1. Create project with 2,000+ modified files
2. Start new Claude Code session with simple prompt: "Hello"
3. Observe token usage in response

Expected: ~5-10K tokens
Actual: ~75K tokens (git status consumes ~60K)

Real-World Impact

In our project:

• 2,220 modified files
• Git status output: 238KB (~60,000 tokens)
• Percentage of context: 64% consumed by git status alone
• Effect: Simple "hello" message uses 74,759 tokens instead of ~5,000

Analysis

Git status is hardcoded to auto-load on session start:

• Not configurable via settings.json
• Not controllable via hooks
• Always injected before SessionStart hooks run
• Grows linearly with number of modified files

Proposed Solution

Add configuration options to settings.json:

{
  "gitStatusInContext": false,           // Disable entirely
  "gitStatusMaxFiles": 50,                // Limit to N files
  "gitStatusSummaryOnly": true            // Just counts, not file list
}

Alternative Workarounds

Current workarounds require frequent commits/stashing:

• Commit everything frequently (disrupts workflow)
• Stash changes (loses work-in-progress context)
• Use .gitignore aggressively (may hide important files)

Use Cases for Disabling

1. Large refactoring sessions - 100+ files modified at once
2. Monorepos - Many subprojects with changes
3. Generated files - Build outputs, compiled assets
4. Long-running experiments - Week-long feature branches

Benefits

• Token efficiency: 80%+ reduction for large working dirs
• User choice: Power users can optimize context window
• Graceful degradation: Still works, just more efficient

Impact

Low risk - git status is helpful but not essential for Claude Code functionality. Users who need it keep current behavior (default: enabled).

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Environment:

• Claude Code version: 2.0.73
• Platform: macOS (Darwin 25.3.0)
• Project: Large TypeScript/PostgreSQL application

Reference commit: https://github.com/emanuelfarruda/migraine-commander/commit/5dca9855c