Struct ThreadTurn 

pub struct ThreadTurn {
    pub turn_id: String,
    pub role: String,
    pub content: String,
    pub timestamp: Option<i64>,
}

One turn fed into crate::Mnemo::ingest_thread (Phase 12.7a).

The caller supplies turn_id (opaque, for idempotence), role (the transcript’s author tag; no interpretation), and content (UTF-8 text; chunked at 8 KB, or truncated at 16 KB when role == "tool"). The ingest path assigns _mnemo.seq monotonically within the destination thread and embeds through the registered embedder.

Tool messages whose content exceeds THREAD_TOOL_RESULT_TRUNCATE_BYTES are stored truncated. Other roles over THREAD_TURN_CHUNK_BYTES are chunked.

Fields

turn_id: String

Opaque per-turn id from the source transcript (e.g. a Claude Code message uuid). Used for ingest_thread’s idempotence check: a turn whose turn_id already exists in the target thread is skipped.

role: String

Author role verbatim from the transcript ("user", "assistant", "system", "tool", …). "tool" triggers the 16 KB truncation branch; all other roles go through the 8 KB chunking branch.

content: String

UTF-8 message content.

timestamp: Option<i64>

Optional caller-supplied creation timestamp (unix seconds). If None, the ingest path uses now_secs() so the record’s created_at still sorts the thread in order. Transcripts that carry a per-turn timestamp should pass it through so a future thread export --by-time can honour it.

Trait Implementations

impl Clone for ThreadTurn

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ThreadTurn

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

Formats the value using the given formatter.