/**
 * Skill Tool Availability
 *
 * Gates the skill infrastructure tools by what the active skill actually
 * advertises: `load_skill_reference` needs a reference file, and
 * `execute_skill_script` needs a script. Ordinary tools are never gated here.
 *
 * A skill's `allowed-tools` frontmatter is deliberately *not* enforced. The
 * Agent Skills specification defines that field as pre-approval: tools the
 * agent may run without prompting, not an authorization boundary. See
 * veryfront/veryfront-issue-inbox#406.
 *
 * @module
 */
/** Active skill file-backed capabilities available to skill infrastructure tools. */
export type SkillToolAvailability = {
    readonly hasActiveSkill?: boolean;
    readonly references?: readonly string[];
    readonly scripts?: readonly string[];
};
/**
 * Filter tool definitions before sending them to the model.
 *
 * Only skill infrastructure tools are affected; every other tool passes
 * through untouched.
 *
 * @param tools - Full list of tool definitions
 * @param skillToolAvailability - Files the active skill advertises
 * @returns Filtered tool definitions
 */
export declare function filterToolsForSkill<T extends {
    name: string;
}>(tools: T[], skillToolAvailability?: SkillToolAvailability): T[];
/** Check whether a specific tool call is available at execution time. */
export declare function isSkillToolAvailable(toolName: string, skillToolAvailability?: SkillToolAvailability): boolean;
/** Filter provider-native or other name-only tool inventories through the same boundary. */
export declare function filterToolNamesForSkill(toolNames: readonly string[], skillToolAvailability?: SkillToolAvailability): string[];
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