Follow Discord
Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.251 ·

Startup records why fast start was disabled

Startup now records why fast start was turned off rather than just that it was.

Under the hood Internal Changes
JSON All of v2.1.251
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
ElsewhereArea: what it touches
Internal ChangesKind: in v2.1.251,
Internal ChangesSection of the release
What

The startup state now carries a reason for why fast-start mode was turned off, plus a provisional startup mode, rather than only a bare flag saying it happened.

Evidence

fastModeBreakerReason

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.251 →

Feedback