Struct Baseline 

pub struct Baseline {
    pub seq: u64,
    pub manifest_etag: Option<String>,
    pub entries: BTreeMap<String, BaselineEntry>,
    pub derived_etag: Option<String>,
    pub skipped: BTreeSet<String>,
    pub prev_scan: BTreeSet<String>,
}

The persisted baseline snapshot: what this syncer believes the bucket holds AND has integrated locally — and, since P1-lite (2026-09-25), the three-way MERGE BASE too. A separate merge base existed because a tree could adopt a UI write the document did not cite yet; under P2 every UI edit commits first, so no tree holds a version the document never cited, and the split had nothing left to keep apart (the sandbox pair LeanCoreP1/LeanCoreP2R).

Fields

seq: u64

Manifest seq at our last install/checkout.

manifest_etag: Option<String>

Manifest document ETag we expect at the next CAS.

entries: BTreeMap<String, BaselineEntry>

derived_etag: Option<String>

THE CHEAP PATH’S RECORD (scan trigger). The pointer etag of the document the last full consume derived against, with nothing left but the agent’s own work; None = derive at the next consume (a failed fetch, a sync, a baseline from before this field). Only the consume writes it — and the commit, when its CAS replaced exactly this document, so the new one is it plus this tree’s own changes.

skipped: BTreeSet<String>

The paths that derive left untaken because the agent is working on them (dirty against the baseline where the document differs). The cheap path holds only while every one is still dirty: an agent that backs out makes the document’s version owed.

prev_scan: BTreeSet<String>

Paths present at the PREVIOUS scan (the two-consecutive-scans deletion rule: absence must survive two scans).

Trait Implementations

impl Clone for Baseline

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 Baseline

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

Formats the value using the given formatter.

impl Default for Baseline

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Baseline

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Baseline

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

where __S: Serializer,

Serialize this value into the given Serde serializer.