[FEATURE] Allow disabling of automatic context compression

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

Somewhere between versions 2.0.0 and 2.0.15, Claude Code started eagerly compressing context long before the limit was reached. This is great for retaining memory, but unnecessarily burns through usage when a user know their context will terminate soon. I suspect this is the reason for may users complaining about Opus limits being reached early (e.g. #9358)

Proposed Solution

Add a toggle to disable auto-context-compression.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

Ask Claude Code to review code that uses about 75% of context.
Claude Code compresses the context and charges me usage for that compression.
Now I'm out of Opus quota and cannot get my code reviewed.
(Please don't dismiss me with "use Sonnet 4.5", this is mathematical code and Opus is far better at reviewing it than Sonnet.)

Additional Context

_No response_