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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.274 ·

New environment variable CLAUDE_CODE_EMIT_STARTUP_TIMING

A new CLAUDE_CODE_EMIT_STARTUP_TIMING environment variable turns on startup-timing telemetry outside remote sessions

Use it now Notable No documentation found New Features
JSON All of v2.1.274
Use it nowTier: how much it should matter to you
3Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
New FeaturesKind: in v2.1.274,
What probably matters to youSection of the release
What

Startup-timing telemetry, which used to only get collected in remote or CCR mode, now also fires when the new CLAUDE_CODE_EMIT_STARTUP_TIMING environment variable is set, even in a regular local session.

Why

This lets someone measure Claude Code's startup timing outside of remote sessions, useful for diagnosing slow starts without needing to run remotely.

Read from
Names in the bundleCLAUDE_CODE_EMIT_STARTUP_TIMING
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_EMIT_STARTUP_TIMING

See this entry in the whole of v2.1.274 →

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