[FEATURE] Add configurable context limit threshold (or option to disable)

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

Claude Code stops accepting input at approximately 85% context usage (observed at 84% / 169k of 200k tokens). This is a hardcoded safeguard that cannot be configured or disabled.

For users who:

• Have disabled autocompact intentionally
• Implement their own session management protocols
• Use MCP tools like should_close_session for context monitoring

This hardcoded limit wastes ~14% of available context (28k tokens) without providing value, since context management is already handled externally.

Proposed Solution

Add a configuration option to control this behavior. For example in settings.json:

  {                                                                                                                                                                     
    "contextLimitThreshold": 0.95                                                                                                                                       
  }                                                                                                                                                                     

Or to disable entirely for power users:

  {                                                                                                                                                                     
    "contextLimitSafeguard": false                                                                                                                                      
  }                                    

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

Configuration and settings

Use Case Example

Users with custom session protocols (e.g., documented in CLAUDE.md) who explicitly manage context boundaries should be able to use the full context window and decide for themselves when to close a session.

Additional Context

_No response_