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 v2.1.257 ·

New env vars added to the passthrough allowlist

Three new env vars are preserved and passed through to subprocesses and sandboxes.

TierYou'll noticehow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaEnvironmentwhat it touches
KindImprovementsin v2.1.257,
You'll notice Notable No documentation found

Three new env vars are preserved and passed through to subprocesses and sandboxes.

CLAUDE_CODE_CCR_SURFACE, CLAUDE_CODE_MODEL_CATALOG_URL, and CLAUDE_CODE_ARTIFACT_OPEN_ACTION are now included in the set of environment variables Claude Code preserves and passes through, for example to subprocesses or sandboxes.

Read from
Names in the bundleCLAUDE_CODE_CCR_SURFACECLAUDE_CODE_MODEL_CATALOG_URLCLAUDE_CODE_ARTIFACT_OPEN_ACTION
How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: CLAUDE_CODE_ARTIFACT_OPEN_ACTION

See this entry in the whole of v2.1.257 →