Struct WriteBudgetLedger 

pub struct WriteBudgetLedger { /* private fields */ }

Daily write-budget ledger for one store.

Thread-safe through the caller (McpServer holds it in a Mutex); persistence is an atomic tmp+rename of a small JSON file.

Implementations

impl WriteBudgetLedger

pub fn paths(store_root: &Path) -> (PathBuf, PathBuf, PathBuf)

Ledger path convention: <store-root>/write_budget.json (read by wm doctor), with the LMDB env and Tantivy index as siblings of the store root’s lmdb/ directory.

pub fn load(store_root: &Path) -> Self

Open (or initialize) the ledger for a store root.

pub fn observe(&mut self, now: DateTime<Utc>) -> WriteBudgetDelta

Observe current sizes, attribute positive growth to today (UTC), prune history beyond retention, and persist. Cheap when called more often than the Tantivy walk interval — only a stat runs.

pub fn fresh_report(&mut self) -> WriteBudgetReport

Refresh the size sample WITHOUT persisting — the read-only surface for wm doctor and /status (a status probe must not write).

pub fn report(&self) -> WriteBudgetReport

Operational summary for wm doctor and /status (as of now).

pub fn report_as_of(&self, now: DateTime<Utc>) -> WriteBudgetReport

Operational summary relative to an explicit instant (tests, replay).

pub fn report_json(&self) -> Value

JSON rendering for /status.

pub fn ledger_path(&self) -> &Path

Current ledger size on disk (diagnostics).

Trait Implementations

impl Debug for WriteBudgetLedger

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

Formats the value using the given formatter.