[BUG] Context low warning shows 7% when actually 36% free (auto-compact disabled)

[michelsdev]

Description

When auto-compact is disabled via /config, the context warning message shows incorrect remaining percentage.

Steps to Reproduce

1. Disable auto-compact in /config
2. Use Claude Code until context reaches ~63%
3. Run /context to see actual usage
4. Observe the warning message in the status bar

Expected Behavior

Warning should reflect actual free space (36.6% in this case).

Actual Behavior

• /context shows: 127k/200k (63% used) with 73k free (36.6%)
• Status bar warning shows: "Context low (7% remaining)"

Screenshot of /context:

Context Usage
claude-opus-4-5-20251101 · 127k/200k tokens (63%)

⛁ System prompt: 6.9k tokens (3.5%)
⛁ System tools: 15.8k tokens (7.9%)
⛁ Custom agents: 438 tokens (0.2%)
⛁ Memory files: 9.4k tokens (4.7%)
⛁ Messages: 94.3k tokens (47.2%)
⛶ Free space: 73k (36.6%)

Status bar shows:

Context low (7% remaining) · Run /compact to compact & continue

Analysis

The math doesn't add up:

• 7% of 200k = 14k tokens
• Actual free space = 73k tokens (36.6%)

It seems like the warning system is still calculating as if auto-compact buffer (77k) is reserved, even though auto-compact is disabled.

Environment

• Claude Code version: 2.0.75
• Model: claude-opus-4-5-20251101
• OS: Linux (WSL2)
• Auto-compact: Disabled

Expected Fix

When auto-compact is disabled, the "Context low" warning should use actual free space percentage, not a calculation that assumes the auto-compact buffer is still reserved.