Context window size ignores CLAUDE_CODE_DISABLE_1M_CONTEXT env var

[duarbdhks]

Description

The webview displays context window size as 1000k for Opus 4.6 and Sonnet 4.6 models, but does not respect the CLAUDE_CODE_DISABLE_1M_CONTEXT=1 environment variable which limits the actual context window to 200k.

Current Behavior

In dist/webview/index.js, the context window size is hardcoded per model:

// Hardcoded model → context window mapping
{ "opus-4-6": 1e6, "sonnet-4-6": 1e6 }
S = 2e5   // 200k fallback
C = 1e6   // 1M default

The getContextWindowSize() function only checks the model name and always returns 1,000,000 for Opus/Sonnet 4.6.

Expected Behavior

When CLAUDE_CODE_DISABLE_1M_CONTEXT=1 is set in Claude Code's settings.json (under env), the context gauge should display 200k instead of 1000k.

How to Reproduce

1. Set CLAUDE_CODE_DISABLE_1M_CONTEXT=1 in ~/.claude/settings.json → env
2. Start agent-flow-app
3. Open the webview — context gauge shows 1000k max instead of 200k

Suggested Fix

• Read the CLAUDE_CODE_DISABLE_1M_CONTEXT env var (from hook stdin payload or Claude Code settings)
• If set to "1", cap context window at 200,000 regardless of model

Environment

• agent-flow-app: v0.6.2
• Model: claude-opus-4-6
• OS: macOS (Darwin 25.3.0)