Struct SiteLesson 

pub struct SiteLesson {
    pub id: String,
    pub title: String,
    pub prompt: String,
    pub code_template: Option<String>,
    pub checks: Vec<String>,
    pub packages: Vec<String>,
    pub solution: Option<String>,
    pub hints: Option<String>,
    pub gotchas: Option<String>,
    pub success_criteria: Option<String>,
}

One lesson as the in-browser runner consumes it: the Rust↔JS JSON contract (ADR-0008, §3.2).

Deliberately not the internal Lesson: it carries only what the runtime needs and drops llm_evaluation_prompt (a server/CLI concern never shipped to the client). A Rust-side change invisible to this shape is invisible to JS.

Fields

id: String

The lesson’s course-scoped slug (its manifest id).

title: String

The lesson’s human-readable title (its lesson_name).

prompt: String

What the learner is asked to do.

code_template: Option<String>

Optional starter code for the editor.

checks: Vec<String>

The check code-strings, run against a submission in the browser to grade it.

packages: Vec<String>

Third-party packages the lesson’s code depends on. Always serialized as an array — empty when the lesson declares none, never null or omitted — so the JS runtime contract shape stays stable (ADR-0011, mirroring the solution: null precedent from ADR-0008).

solution: Option<String>

The author’s known-correct answer, for the runner to self-verify.

hints: Option<String>

Optional learner-facing hints, rendered as an expandable <details> panel in the browser. Always serialized (null when absent, never dropped via skip_serializing_if) so the contract shape stays stable — mirroring the solution: null precedent from ADR-0008.

gotchas: Option<String>

Optional learner-facing gotchas (common pitfalls), rendered as an expandable <details> panel in the browser. Always serialized (null when absent, never dropped via skip_serializing_if) so the contract shape stays stable — mirroring the solution: null and hints: null precedents from ADR-0008.

success_criteria: Option<String>

Optional author rubric, added to the in-browser LLM feedback prompt between the task and the submission (ADR-0020). Always serialized (null when absent) like solution, hints, and gotchas.

Trait Implementations

impl Clone for SiteLesson

fn clone(&self) -> SiteLesson

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SiteLesson

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for SiteLesson

fn eq(&self, other: &SiteLesson) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for SiteLesson

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for SiteLesson

impl StructuralPartialEq for SiteLesson