Module prompt 

Structured agent prompt builder.

Constructs a multi-section system prompt that gives agents the context they need to implement a unit successfully. Ports the 11-section architecture from the pi extension prompt.ts into Rust.

Sections (in order):

1. Project Rules
2. Parent Context
3. Sibling Discoveries
4. Unit Assignment
5. Concurrent Modification Warning
6. Referenced Files
7. Acceptance Criteria
8. Pre-flight Check
9. Previous Attempts
10. Approach
11. Verify Gate
12. Constraints
13. Tool Strategy

Structs

FileOverlap

Describes a concurrent unit that overlaps on files.

PromptOptions

Options for prompt construction.

PromptResult

Result of building an agent prompt.

Functions

build_agent_prompt

Build the full structured agent prompt for a unit.