Strategies

basemode supports five continuation strategies.

Strategy	When used	Notes
completion	Base completion models (davinci-002, etc.)	Uses text completion API directly
prefill	Anthropic Claude models that still allow assistant prefill	Seeds assistant turn with suffix of prefix
system	Default fallback for most chat models	Strict continuation-only system prompt
few_shot	Manual override for stubborn models	Uses varied continuation examples
fim	FIM-capable code models	Uses model-family-specific FIM tokens

Auto-selection

detect_strategy(model) picks a strategy from normalized model ID.

• Claude models default to prefill
• Newer Claude models in a no-prefill allowlist are forced to system
• Known completion models go to completion
• FIM-family names go to fim
• Everything else uses system

Manual override

basemode "Text to continue" --strategy few_shot

If you pass an unknown strategy, basemode raises a clear validation error with valid names.