What
A new system prompt mode that instructs Claude to produce more polished, concise output without filler words or restating what the user said.
Status
Feature-flagged via tengu_bergotte_lantern (defaults to off)
Details
- When enabled, adds: "Your output to the user should be concise and polished. Avoid using filler words, repetition, or restating what the user has already said..."
- Falls back to "Your responses should be short and concise" when disabled
- Does not apply to code or tool calls
Evidence
New output style prompt (search for "tengu_bergotte_lantern", "concise and polished")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.