/**
 * Detect the current operational scope from environment signals.
 * Returns a scope name string (no prefix), or null if no scope detected.
 * Priority: HIPPO_SCOPE > GSTACK_SKILL > OPENCLAW_SKILL.
 *
 * Pure env var reads: no I/O, safe to call from hot paths (e.g. UserPromptSubmit hook).
 */
export declare function detectScope(): string | null;
/**
 * Compute scope match between a memory's scope tags and the active scope.
 * Returns: 1 if matching scope, -1 if mismatching scope, 0 if neutral (no scope on either side).
 */
export declare function scopeMatch(memoryTags: string[], activeScope: string | null): -1 | 0 | 1;
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