Trait PromptFragment 

pub trait PromptFragment:
    Send
    + Sync
    + DynClone {
    // Required methods
    fn name(&self) -> &str;
    fn render(&self, ctx: &FragmentContext<'_>) -> Option<String>;

    // Provided method
    fn priority(&self) -> i32 { ... }
}

Composable prompt fragment — each fragment owns one concern.

Priority convention

Range	Typical use
10–19	Core role/personality
20–29	Thinking methodology
50–59	Safety rules, environment info
60–69	Workflow instructions
70–79	Tool descriptions
80–89	Feature-specific (multi-agent)
90–99	Network environment, memory

Lower priority renders first (closer to the top of the system prompt).

Required Methods

fn name(&self) -> &str

Human-readable name for debugging.

fn render(&self, ctx: &FragmentContext<'_>) -> Option<String>

Render this fragment’s content. Return None to skip.

Provided Methods

fn priority(&self) -> i32

Lower = rendered first. Default: 100.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl PromptFragment for CoreInstructionsFragment

impl PromptFragment for DynamicToolsFragment

impl PromptFragment for EnvironmentFragment

impl PromptFragment for MemoryFragment

impl PromptFragment for NetworkEnvironmentFragment