/**
 * Pure namespace resolution: pick the first non-empty source, then sanitize to
 * a valid Postgres identifier prefix. Exported for direct testing — the impure
 * {@link projectNamespace} wraps it with the actual env + package.json sources.
 */
export declare function resolveNamespace(envOverride: string | undefined, pkgName: string | undefined): string;
/** This project's namespace token, resolved once per process. */
export declare function projectNamespace(): string;
/** Prefix for this project's per-run test databases: `<project>_test_`. */
export declare function testDbPrefix(): string;
/** Prefix for this project's per-run runtime (app) roles: `<project>_app_`. */
export declare function appRolePrefix(): string;
/**
 * Prefix for this project's shared, content-keyed templates: `<project>_tmpl_`.
 *
 * Templates sit in their own prefix rather than under `testDbPrefix()` because
 * they have a different lifecycle and a different reaping rule: a per-run clone
 * dies with its run, a template deliberately outlives every run that uses it
 * and is dropped only once no run wants it. Separate prefixes keep the reaper's
 * two passes from having to tell the names apart by shape. Issue #340.
 */
export declare function templateDbPrefix(): string;
/**
 * `LIKE` pattern matching every per-run test database of THIS project, with the
 * prefix underscores escaped so they match literally. The reaper uses it to
 * scope its sweep to its own namespace and never another project's databases.
 */
export declare function testDbLikePattern(): string;
/** `LIKE` pattern matching every shared template of THIS project. */
export declare function templateDbLikePattern(): string;
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