/**
 * Agent profile Markdown (filenames, load order, system prompt assembly) and
 * small helpers for message content extraction.
 *
 * Canonical on-disk root: `agents/<agentId>/profile/`.
 */
export declare const DEFAULT_AGENTS_FILENAME = "AGENTS.md";
export declare const DEFAULT_SOUL_FILENAME = "SOUL.md";
export declare const DEFAULT_TOOLS_FILENAME = "TOOLS.md";
export declare const DEFAULT_IDENTITY_FILENAME = "IDENTITY.md";
export declare const DEFAULT_HEARTBEAT_FILENAME = "HEARTBEAT.md";
export type AgentProfileMarkdownFilename = typeof DEFAULT_AGENTS_FILENAME | typeof DEFAULT_SOUL_FILENAME | typeof DEFAULT_TOOLS_FILENAME | typeof DEFAULT_IDENTITY_FILENAME | typeof DEFAULT_HEARTBEAT_FILENAME;
/**
 * Order for loading profile Markdown files into the system prompt (persona / user before repo guide, etc.).
 */
export declare const AGENT_PROFILE_MARKDOWN_SYSTEM_FILES: readonly AgentProfileMarkdownFilename[];
/** Files that should be surfaced when missing. Other profile files are optional overlays. */
export declare const REQUIRED_AGENT_PROFILE_MARKDOWN_FILES: readonly AgentProfileMarkdownFilename[];
export declare const REQUIRED_AGENT_PROFILE_MARKDOWN_FILE_SET: ReadonlySet<string>;
export interface WorkspaceProfileMarkdownFile {
    name: AgentProfileMarkdownFilename;
    path: string;
    content?: string;
    missing: boolean;
}
/**
 * Strip YAML front matter from markdown content.
 */
export declare function stripFrontMatter(content: string): string;
/** Maximum characters to inject from workspace files into system prompt */
export declare const PROFILE_MARKDOWN_MAX_CHARS = 20000;
export interface TruncateResult {
    content: string;
    truncated: boolean;
    originalLength: number;
}
/**
 * Truncate workspace file content to prevent token overflow.
 * Keeps head (HEAD_TRUNCATION_RATIO, 70%) and tail (TAIL_TRUNCATION_RATIO, 20%) with a
 * truncation marker in between; the remainder is reserved for the marker.
 */
export declare function truncateProfileMarkdownContent(content: string, maxChars: number): TruncateResult;
export interface ProfileMarkdownFile {
    name: AgentProfileMarkdownFilename;
    path?: string;
    content: string;
    missing?: boolean;
}
/**
 * Convert {@link ProfileMarkdownFile} to {@link WorkspaceProfileMarkdownFile} (adds required path field).
 * @param pathFallbackDir — used when `file.path` is absent (e.g. canonical `profile/` root).
 */
export declare function toWorkspaceProfileMarkdownFile(file: ProfileMarkdownFile, pathFallbackDir: string): {
    name: AgentProfileMarkdownFilename;
    path: string;
    content?: string;
    missing: boolean;
};
/**
 * Load profile Markdown from `profileDir` (`agents/<agentId>/profile/`).
 */
export declare function loadProfileMarkdownFiles(profileDir: string): ProfileMarkdownFile[];
/**
 * Extract text content from agent message content array
 */
export declare function extractTextContent(content: Array<{
    type: string;
    text?: string;
}>): string;
/**
 * Concatenate thinking / reasoning content blocks from assistant message.content.
 * pi-ai may use `thinking` or `text` on `type: "thinking"` blocks.
 */
export declare function extractThinkingContent(content: Array<{
    type: string;
    thinking?: string;
    text?: string;
}> | undefined): string;
/**
 * Extended thinking on the assistant message (e.g. Anthropic reasoning / pi-ai reasoning_details).
 */
export declare function extractThinkingFromAssistantMessage(message: {
    role?: string;
    reasoning_details?: {
        thinking?: string;
    };
} | undefined): string;