/**
 * PermissionPolicy — data-driven role-based authorization for tool dispatch.
 *
 * Closes Neo gap #2 (of 8). Permissions are CROSS-CUTTING — they're not
 * context engineering, they're a guard ON context-engineering operations
 * (tool dispatch, skill activation, memory writes, output emission).
 * That's why this lives in `agentfootprint/security`, parallel to the
 * provider subpaths.
 *
 * Two surfaces, one primitive:
 *   1. `PermissionPolicy.fromRoles({...}, activeRole)` — declarative,
 *      data-driven, auditable. Production governance.
 *   2. The PermissionPolicy instance satisfies BOTH:
 *      - `PermissionChecker` interface (async check; consumed by Agent
 *        constructor's `permissionChecker` field)
 *      - sync `isAllowed(toolId)` method (consumed by `gatedTools(...)`
 *        from `agentfootprint/providers`)
 *
 * **Status: contract-shaped and tested — independently reproduced against a
 * local harness, 2026-08-13.** A tool declaring `memory_write` and `user_data`
 * was put in front of two roles: the read-only role passed the tool-NAME
 * allowlist, failed the `memory_write` capability check, and the tool executed
 * ZERO times; the admin role cleared `tool_call`, `memory_write` and
 * `user_data` and executed once. A separate checker that threw `simulated
 * authorizer outage` failed CLOSED — a denial carrying the operator's error in
 * its rationale, the model free to continue without the tool, zero executions
 * again. The reviewer's own wording: *"the permission checker is a real
 * execution guard, not merely tool hiding"*, which holds exactly as far as the
 * policy inputs and the role binding are trustworthy — a fact about a
 * deployment, not about this class.
 *
 * What was exercised: the guard, end to end, by somebody who is not this
 * library's author — on a DETERMINISTIC LOCAL run whose model was a mock and
 * whose "authorizer outage" was a thrown `Error` (those tests *"were local and
 * deterministic, so they consumed no GCP credit"*). What was NOT: **no external
 * authorization service has answered a `check()` from this repository**, so
 * this is not the field-validated rung — a real IAM/OPA/entitlements backend,
 * with its own latency, partial outages and stale caches, remains unexercised.
 * Runnable: `examples/features/03-permissions.ts` (all four shapes).
 *
 * Pattern: Strategy (GoF) for the role-allowlist policy + Adapter
 *          (matches `PermissionChecker` interface so it composes with
 *          existing v2.4 Agent constructor).
 *
 * Role: Layer-3 cross-cutting guard. Not Injection. Not provider.
 *       Lives in its own subpath (`agentfootprint/security`).
 *
 * @example  Read-only role for a support agent
 *   const policy = PermissionPolicy.fromRoles(
 *     {
 *       readonly: ['lookup_order', 'get_status', 'list_skills', 'read_skill'],
 *       support: ['lookup_order', 'get_status', 'process_refund', 'list_skills', 'read_skill'],
 *     },
 *     'readonly',
 *   );
 *
 *   policy.isAllowed('lookup_order');     // → true
 *   policy.isAllowed('process_refund');   // → false (not in readonly role)
 *
 *   // As a tool-dispatch gate (composes with gatedTools)
 *   const provider = gatedTools(staticTools(allTools), (name) => policy.isAllowed(name));
 *
 *   // As an Agent permissionChecker (the v2.4 surface)
 *   const agent = Agent.create({ provider, model, permissionChecker: policy }).build();
 *
 * @example  Per-identity role switching at runtime
 *   const policy = PermissionPolicy.fromRoles({
 *     readonly: [...],
 *     admin: [...],
 *   }, 'readonly');
 *
 *   const adminPolicy = policy.withActiveRole('admin');
 *   // Same allowlist data; different active role.
 */
import type { PermissionCapability, PermissionChecker, PermissionRequest, PermissionDecision, ToolCapability } from '../adapters/types.js';
/**
 * Map of role name → list of tool ids that role is allowed to invoke.
 * The shape consumers extend over time as new tools / roles arrive.
 */
export type RoleAllowlist = Readonly<Record<string, readonly string[]>>;
/**
 * Map of role name → the ids that role may reach, for a rule map beside the
 * tool allowlist (9.11.0). A role ABSENT from the map has no rule of that kind,
 * which means the rule does not apply to it — see {@link PermissionPolicyRules}.
 */
export type RoleIdRules = Readonly<Record<string, readonly string[]>>;
/**
 * The optional rules that sit BESIDE the tool allowlist (9.11.0).
 *
 * Both are opt-in and both are enforced only where they are configured, because
 * every one of them would otherwise change what an existing deployment permits.
 * A `PermissionPolicy.fromRoles(roles, role)` built without this bag behaves
 * exactly as it did in every earlier release — and reports `governs` as absent,
 * so the framework never asks it anything new either.
 */
export interface PermissionPolicyRules {
    /**
     * role → the {@link ToolCapability} values that role may exercise.
     *
     * Configured (for ANY role) ⇒ the policy declares it governs all four
     * capabilities, and the framework starts asking about a tool that declared
     * them. For a role with a rule, a capability the rule does not list is
     * DENIED. For a role WITHOUT one, capability checks fall through to the tool
     * allowlist — the tool already passed it, so nothing changes for that role.
     *
     * @example a support role that may read but never write
     *   PermissionPolicy.fromRoles(roles, 'support', {
     *     capabilities: { support: ['memory_read', 'external_net'], admin: [...] },
     *   })
     */
    readonly capabilities?: Readonly<Record<string, readonly ToolCapability[]>>;
    /**
     * role → the SKILL ids that role may activate with `read_skill`.
     *
     * Configured (for ANY role) ⇒ the policy declares it governs `'skill_read'`,
     * and the agent starts asking per skill: a refused skill's row disappears
     * from the `read_skill` menu the model reads, and an activation of it is
     * refused with this policy's own rationale. For a role WITHOUT a rule, every
     * skill stays visible — silence is not a denial.
     *
     * Ids are the bare skill ids (`'refunds'`), not the `skill:` targets: the
     * prefix is the wire convention that keeps a skill and a tool of the same
     * name apart, and it is this policy's job to know that, not yours.
     */
    readonly skills?: RoleIdRules;
}
export interface PermissionPolicyOptions {
    /**
     * The role allowlist. Each role maps to the tool ids it can invoke.
     * Tool ids match the `name` field of `Tool.schema.name` exactly.
     */
    readonly roles: RoleAllowlist;
    /**
     * Which role is active for this policy instance. Calls to
     * `.isAllowed(toolId)` check against this role's allowlist.
     * Use `.withActiveRole(name)` to derive a sibling policy with a
     * different active role.
     */
    readonly activeRole: string;
    /** Optional capability + skill rules (9.11.0). See {@link PermissionPolicyRules}. */
    readonly rules?: PermissionPolicyRules;
}
/**
 * Data-driven role-based permission policy. Satisfies the v2.4
 * `PermissionChecker` interface AND exposes a sync `isAllowed` method
 * for use with `gatedTools` from `agentfootprint/providers`.
 */
export declare class PermissionPolicy implements PermissionChecker {
    private readonly opts;
    readonly name = "PermissionPolicy";
    /**
     * Which capabilities this policy asks to be consulted about beyond
     * `'tool_call'` (9.11.0) — DERIVED from what was configured, never a
     * separate switch that could disagree with the rules.
     *
     * Absent when no rules were given, which is what makes every policy built
     * the old way byte-identical: the framework asks it nothing new.
     */
    readonly governs?: readonly PermissionCapability[];
    private constructor();
    /**
     * Factory: build a role-based policy from a role → tool-ids map and
     * the role active for this instance.
     *
     * Throws if `activeRole` isn't a key in `roles` — fail loud at
     * config time, not at first denied call.
     */
    static fromRoles(roles: RoleAllowlist, activeRole: string, rules?: PermissionPolicyRules): PermissionPolicy;
    /**
     * Sync allowlist check. Use as a predicate with `gatedTools`:
     *
     *   gatedTools(staticTools(allTools), (toolId) => policy.isAllowed(toolId))
     *
     * Returns true iff `toolId` is in the active role's allowlist.
     * Closes-fail by design: missing role membership = denied.
     */
    isAllowed(toolId: string): boolean;
    /**
     * Async check matching the `PermissionChecker` interface — consumed
     * by `Agent.create({ permissionChecker })`. Wraps `isAllowed` with
     * the structured `PermissionDecision` envelope (allow / deny + a
     * `policyRuleId` so observability can trace which role decided).
     *
     * ## What each capability is judged by (9.11.0)
     *
     * - `'tool_call'` — the tool allowlist. Unchanged since v2.4.
     * - `'skill_read'` — the active role's `rules.skills` list, when it has one.
     *   Without one, allowed: a policy that never mentioned skills has not
     *   denied any, and silence is not a refusal.
     * - a {@link ToolCapability} — the active role's `rules.capabilities` list,
     *   when it has one. Without one, it falls through to the tool allowlist
     *   below, which the tool already passed on its `'tool_call'` check — so a
     *   role with no capability rule behaves exactly as it did before.
     *
     * The framework only ever sends the last two to a policy that declared
     * {@link PermissionPolicy.governs}, which this class derives from the rules
     * themselves — so "unconfigured" and "never asked" cannot drift apart.
     */
    check(request: PermissionRequest): Promise<PermissionDecision>;
    /**
     * Skill activation, judged on its own map (9.11.0).
     *
     * Deliberately NOT routed through the tool allowlist: a `skill:<id>` target
     * is not a tool name, so `isAllowed` would deny every skill for every role
     * the moment a policy was attached — hiding a whole catalogue nobody asked
     * to hide. A role with no skill rule sees every skill; a role WITH one sees
     * exactly what it lists.
     */
    private checkSkill;
    /**
     * Derive a sibling policy with a different active role. Same role
     * map; different active role. Useful for per-identity routing
     * (one policy instance per request, varying active role per caller).
     *
     * Returns a NEW PermissionPolicy — original is unchanged.
     */
    withActiveRole(activeRole: string): PermissionPolicy;
    /** The role name currently active. Useful for observability. */
    get activeRole(): string;
    /** All defined role names. Stable order = registration order. */
    get roles(): readonly string[];
    /** All tool ids allowed under the current active role. */
    allowedToolIds(): readonly string[];
}
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