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Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.275 ·

CLAUDE_CONTEXT_COLLAPSE_MODEL env var removed entirely

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The CLAUDE_CONTEXT_COLLAPSE_MODEL environment variable has been removed

TierUnder the hoodhow much it should matter to you
Useful1my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaEnv Varswhat it touches
KindRemovedin v2.1.275,
Under the hood

The CLAUDE_CONTEXT_COLLAPSE_MODEL environment variable has been removed

What

The CLAUDE_CONTEXT_COLLAPSE_MODEL environment variable, which was previously recognized and passed through by Claude Code in two places, no longer appears anywhere in the codebase.

Why

Anyone who set this environment variable should know it no longer has any effect.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtThe finding does not say what CLAUDE_CONTEXT_COLLAPSE_MODEL did or why it was removed.

See this entry in the whole of v2.1.275 →