/**
 * Research digest builder — aggregates in-window research runs into a
 * dual markdown+JSON artifact for the Telegram bot (sibling spec) to push.
 *
 * Clock discipline: `now`/`since` are injected ISO strings — never new Date() here.
 * Non-sensitive summary content only (titles/summaries; no raw body values).
 *
 * bober: collectRunsFromVault reads vault research notes (1:1 dated artifacts)
 *        rather than hub Findings (content-deduped, historyless, path-less).
 *        Swap if a dedicated digest store is ever introduced.
 */
/** One research run entry in a digest. */
export interface DigestRun {
    /** Job title — note frontmatter.title ("Research — <question>"). */
    title: string;
    /** Non-sensitive one-line summary derived from frontmatter.question/title only. */
    topFinding: string;
    /** ISO — note frontmatter.generatedAt. */
    generatedAt: string;
    /** Absolute note path — the source artifact link. */
    source: string;
}
/** The full digest structure written to both .md and .json. */
export interface Digest {
    since: string;
    now: string;
    generatedAt: string;
    runs: DigestRun[];
}
/** Injectable dependencies for buildDigest — keeps it testable without real vault. */
export interface DigestDeps {
    /** Injected collector — returns in-window runs. Fake in unit tests; real in CLI. */
    collectRuns: (since: string, now: string) => Promise<DigestRun[]>;
    /**
     * Absolute path to the digests directory.
     * e.g. <root>/.bober/research/digests — injected; temp dir in tests.
     */
    digestsDir: string;
}
/**
 * Render a Digest into a markdown string.
 *
 * PURE: no IO, no Date.now(), no side effects.
 * Mirrors src/hub/priority-md.ts: builds lines[] then joins with "\n".
 *
 * Empty-window rule (sc-5-3): when runs.length === 0, the body explicitly
 * states no new research was produced in the window.
 */
export declare function renderDigestMarkdown(digest: Digest): string;
/**
 * Collect in-window research runs via deps.collectRuns, render both markdown
 * and JSON artifacts, write them to deps.digestsDir, and return the result.
 *
 * File naming: `now.slice(0, 10)` → YYYY-MM-DD (matches note-writer.ts:24).
 * JSON format: JSON.stringify(digest, null, 2) + "\n" (mirrors fleet/index.ts:69).
 *
 * Empty window: still writes both files with an explicit no-new-research body.
 * Never throws on empty collectRuns — caller receives both paths.
 */
export declare function buildDigest(since: string, now: string, deps: DigestDeps): Promise<{
    digest: Digest;
    mdPath: string;
    jsonPath: string;
}>;
/**
 * Real collectRuns implementation: reads research vault notes under
 * <vaultRoot>/research/, filters by frontmatter.generatedAt ∈ [since, now],
 * and maps each matching note to a DigestRun.
 *
 * Source selection: vault notes are 1:1 dated run artifacts (runner.ts:186-190
 * writes a new file per run). Hub Findings are content-deduped by
 * sha256(domain|title|kind) and silently undercount a window — not suitable.
 *
 * Non-sensitive: topFinding is frontmatter.question/title only — never raw body.
 *
 * Window compare: ISO lexicographic (safe because all timestamps are
 * toISOString() fixed-width — finding-store.ts:101-104).
 */
export declare function collectRunsFromVault(vaultRoot: string, since: string, now: string): Promise<DigestRun[]>;
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