Claude Code v2.1.248 · 27 Aug 2026
Startup profiling records a fixed set of named phases
Startup profiling now names specific phases including MCP connection and remote config setup.
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All of v2.1.248
Use it now Tier: how much it should matter to you
3 Useful: my rating, 1 to 5
2 Signal: worth watching, 1 to 5
Startup Area: what it touches
Internal Changes Kind: in v2.1.248, 27 Aug 26
What probably matters to you Section of the release
What
With startup profiling enabled via CLAUDE_CODE_PROFILE_STARTUP
Evidence
growthbook_init
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
See this entry in the whole of v2.1.248 →
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Related
Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.
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Settings validation checks crossSessionInbound
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In v2.1.248 What probably matters to you release-page order
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Sudo npm install notice reads the env var live
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