/**
 * Ledger context provider for comprehensive agent activity tracking.
 *
 * Tracks tool call history with inputs, outputs, timing, and success/failure status.
 * This audit trail enables steering handlers to make informed guidance decisions
 * based on agent behavior patterns and history.
 */
import type { LocalAgent } from '../../../types/agent.js';
import type { SteeringContextData, SteeringContextProvider } from './context-provider.js';
/**
 * Configuration for {@link ToolLedgerProvider}.
 */
export interface ToolLedgerProviderConfig {
    /** Maximum number of tool calls to retain. Older entries are dropped. Defaults to 100. */
    maxEntries?: number;
    /** Identifier for this provider instance. Defaults to `'strands:steering:toolLedger'`. */
    name?: string;
}
/**
 * Context provider that tracks tool call history within a single invocation.
 *
 * Records every tool invocation with inputs, execution time, and success/failure status.
 * The ledger is available to steering handlers for pattern detection
 * (e.g., repeated failures, excessive retries).
 *
 * When the ledger exceeds maxEntries, the oldest entries are dropped.
 *
 * @example
 * ```typescript
 * const handler = new LLMSteeringHandler({
 *   systemPrompt: '...',
 *   contextProviders: [new ToolLedgerProvider()],
 * })
 * ```
 */
export declare class ToolLedgerProvider implements SteeringContextProvider {
    readonly name: string;
    private readonly _maxEntries;
    private readonly _toolCalls;
    constructor(config?: ToolLedgerProviderConfig);
    observeAgent(agent: LocalAgent): void;
    private _onBeforeToolCall;
    private _onAfterToolCall;
    /**
     * Return the current ledger snapshot.
     */
    get context(): SteeringContextData;
}
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