Module system_prompt 

pi’s system prompt inputs, as before_agent_start hands them to extensions.

Mirrors NormalizedBuildSystemPromptOptions in packages/coding-agent/src/core/system-prompt.ts and Skill in core/skills.ts in pi v1.0.0.

Structs

ContextFile

A context file and its text.

Skill

A skill: instructions the model reads on demand. A handler may add one with only the fields the prompt shows; the others take their empty value.

SystemPromptOptions

pi’s normalized BuildSystemPromptOptions. Handlers edit it and hand it back, so a key they removed takes its empty value.