Struct Vcs 

pub struct Vcs {

    pub commits_long: u32,
    pub commits_recent: u32,
    pub churn_long: u64,
    pub churn_recent: u64,
    pub authors_long: u32,
    pub authors_recent: u32,
    pub ownership_top_share: f64,
    pub burst: f64,
    pub bug_fix_commits: u32,
    pub security_fix_commits: u32,
    pub revert_commits: u32,
    pub age_days: u32,
    pub last_modified_days: u32,
    pub change_entropy_long: f64,
    pub change_entropy_recent: f64,
    pub cochange_entropy_long: f64,
    pub cochange_entropy_recent: f64,
    pub risk_score: f64,
    pub hotspot_score: Option<f64>,
    pub author_ids: Option<Vec<String>>,
}

Available on crate feature vcs-git only.

Wire form of crate::vcs::Stats — per-file change-history metrics.

Always-slim by design (issue #635): the row carries only the metrics that vary per file. The four constant stamps that hold across every row of a single response — vcs_schema_version, risk_score_version, long_window_days, recent_window_days — live exactly once in the enclosing envelope (bca vcs’s Report, POST /vcs’s response, and the /vcs/trend document), never repeated per row or per trend point.

The remaining field names are the nested vcs object’s output keys verbatim (issue #684). All scores are ordinal. hotspot_score and author_ids are elided when absent (no AST metrics alongside, and --emit-author-details off, respectively). Gated behind the vcs-git backend feature.

Fields

commits_long: u32

Distinct commits in the long window.

commits_recent: u32

Distinct commits in the recent window.

churn_long: u64

Σ(added + deleted) lines in the long window.

churn_recent: u64

Σ(added + deleted) lines in the recent window.

authors_long: u32

Distinct authors in the long window.

authors_recent: u32

Distinct authors in the recent window.

ownership_top_share: f64

Top-author edit share in [0, 1].

burst: f64

commits_recent / commits_long, clamped to [0, 1].

bug_fix_commits: u32

Long-window bug-fix commit count.

security_fix_commits: u32

Long-window security-fix commit count.

revert_commits: u32

Long-window revert commit count.

age_days: u32

Days since the file’s first in-window commit (capped at window).

last_modified_days: u32

Days since the file’s most recent in-window commit.

change_entropy_long: f64

Change entropy (bits) over the long window — Hassan 2009 History Complexity Metric; higher means more scattered changes.

change_entropy_recent: f64

Change entropy (bits) over the recent window.

cochange_entropy_long: f64

Co-change graph entropy (bits) over the long window — arXiv 2504.18511; higher means changes ripple across more partners. 0.0 is computed (no co-changes), not missing.

cochange_entropy_recent: f64

Co-change graph entropy (bits) over the recent window.

risk_score: f64

Ordinal composite risk score.

hotspot_score: Option<f64>

Complexity × recent-churn hotspot score, when AST metrics were computed alongside the history.

author_ids: Option<Vec<String>>

SHA-256-hashed canonical author identities, under --emit-author-details.

Trait Implementations

impl Clone for Vcs

fn clone(&self) -> Vcs

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Vcs

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

Formats the value using the given formatter.

impl Default for Vcs

fn default() -> Vcs

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Vcs

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<&Stats> for Vcs

fn from(s: &Stats) -> Self

Converts to this type from the input type.

impl PartialEq for Vcs

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Vcs

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Vcs