Struct SessionMeta 

pub struct SessionMeta {
    pub schema_version: u32,
    pub session_id: String,
    pub kind: String,
    pub parent_id: Option<String>,
    pub group: Option<String>,
    pub cwd: PathBuf,
    pub git: Option<GitMeta>,
    pub cli_version: String,
    pub harness: String,
    pub api_schema: String,
    pub model: String,
}

Line-1 payload: the session header (ADR-0024 §2.3). An open, growing record — every field beyond the identity core is optional-with-default so old and new binaries share one on-disk population (§2.3 rules).

Fields

schema_version: u32

The trace schema version.

session_id: String

The session id (also in the filename).

kind: String

The session kind — an open string: "main" today; "subagent"/ "workflow" later. Listers skip kinds they don’t know.

parent_id: Option<String>

The parent session id (subagents/forks — §2.4 rule 4). None = a root session.

group: Option<String>

The grouping id (a workflow run — §2.4 rule 5).

cwd: PathBuf

The canonical start cwd (the directory key — immutable, §2.1).

git: Option<GitMeta>

Git context at session start, None outside a repo.

cli_version: String

The CLI version that wrote the trace.

harness: String

The harness pack — recorded so resume rehydrates the right pack independent of the model catalog (grok’s agent_name rationale).

api_schema: String

The provider wire schema.

model: String

The model id.

Trait Implementations

impl Clone for SessionMeta

fn clone(&self) -> SessionMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SessionMeta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SessionMeta

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SessionMeta

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

where __S: Serializer,

Serialize this value into the given Serde serializer.