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 v2.1.273 ·

Unknown slash commands can now fall back to sending the text to the model

An unrecognized /command can now be sent to Claude as a normal prompt instead of always erroring

TierYou'll noticehow much it should matter to you
Useful4my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaSlash Commandswhat it touches
KindImprovementsin v2.1.273,
You'll notice

An unrecognized /command can now be sent to Claude as a normal prompt instead of always erroring

What

Previously, typing a /command that Claude Code didn't recognize always produced an "Unknown command" error. Now, in normal interactive use (not inside a subagent or non-interactive mode), Claude Code can instead fall back to treating your whole input as a regular message to Claude.

Why

This avoids a dead-end error for input that merely looks like a slash command but isn't, letting Claude try to make sense of it as a normal prompt instead.

See this entry in the whole of v2.1.273 →