/**
 * daemon-version-compat.ts
 *
 * The adopt-or-start path (bootstrap-services.ts) verifies that a daemon found
 * on the configured port is a GoodVibes daemon via its `/status` identity probe,
 * which reports the daemon's SDK `version`. Verifying identity is NOT the same as
 * verifying that the daemon speaks the SAME wire shape this surface expects:
 * adopting a daemon built from an incompatible SDK band produces silent
 * wire-shape failures (a session method the surface calls that the daemon does
 * not serve, a payload field that moved). This module answers the one question
 * the probe leaves open, "may this surface safely adopt a daemon reporting
 * version X?", so the adopt path can refuse an incompatible occupant honestly
 * instead of adopting it and failing later, and without ever starting a second
 * competing daemon on an occupied port.
 *
 * Compatibility band policy (semver, https://semver.org/#spec-item-4):
 *   - `0.y.z` releases treat the MINOR position as the breaking axis, so two
 *     `0.y` versions are compatible only when `y` matches (0.38.x adopts 0.38.*
 *     but not 0.37.*).
 *   - `>=1.0.0` releases treat MAJOR as the breaking axis, so major must match
 *     (1.4.x adopts any 1.*.* but not 2.*.*).
 *   - A version string that cannot be parsed is treated as INCOMPATIBLE, the
 *     conservative, honest default. An empty/absent remote version is likewise
 *     incompatible: the surface must not adopt something it cannot band-check.
 * Prerelease and build metadata (`-rc.1`, `+sha`) are ignored for banding.
 */
/**
 * True when a surface reporting `localVersion` may safely adopt a daemon
 * reporting `remoteVersion`, see the band policy in the file header.
 * Unparseable or absent versions are never compatible.
 */
export declare function isDaemonVersionCompatible(localVersion: string | undefined | null, remoteVersion: string | undefined | null): boolean;
/**
 * Human-readable reason string for an incompatible adoption refusal, naming
 * both the occupied endpoint's version and this surface's version so the
 * operator can see the skew without guessing.
 */
export declare function describeVersionIncompatibility(host: string, port: number, localVersion: string | undefined | null, remoteVersion: string | undefined | null): string;
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