/**
 * One-line prompt hints for each tool, shown in the system prompt's Tools
 * section. Full parameter docs live on each tool's JSON schema description
 * (sent separately via the tool definition), so these hints stay short.
 *
 * Hints exist ONLY for tools whose correct usage is NOT obvious from their
 * schema description alone. The core file/nav/exec tools (read/write/edit/
 * bash/find/grep/ls) deliberately have NO hint: an ablation (experiments/
 * prompt-bench, Opus n=12) showed dropping their hints did not change tool
 * selection — the schema description already carries when/how to use them.
 * Cross-tool preferences for those tools live in TOOL_STEERING instead.
 */
export declare const TOOL_PROMPT_HINTS: Record<string, string>;
/**
 * Cross-tool selection guidance that no single tool's own schema description
 * can state (it's relational). Each clause only renders when its tools are
 * actually active, so the line never references an unavailable tool. Proven
 * equivalent to the full per-tool hint list in the prompt-bench ablation
 * while costing ~95% fewer words.
 */
export declare const TOOL_STEERING_CLAUSES: ReadonlyArray<{
    needs: readonly string[];
    text: string;
}>;
/** Build the steering line from whichever clauses apply to the active tools. */
export declare function buildToolSteering(activeTools: readonly string[]): string;
/**
 * Every tool name `createTools()` can register, including the conditional ones
 * (web_search on non-Anthropic providers, generate_image with OpenAI auth,
 * plan tools, the subagent cluster) and `tool_search`, which MCP deferred
 * loading adds. Used to validate an agent definition's `tools:` frontmatter —
 * an unknown name is silently dropped by the session allow-list, so a typo
 * would otherwise cost the agent a capability with no signal at all.
 */
export declare const BUILTIN_TOOL_NAMES: readonly string[];
/** Tools always rendered when no explicit tool list is provided. */
export declare const DEFAULT_TOOL_NAMES: readonly string[];
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