export declare const SUPPORTED_LANGS: readonly ["ts", "tsx", "js", "rust", "graphql", "python", "go", "json", "toml", "yaml"];
export type SupportedLang = typeof SUPPORTED_LANGS[number];
export declare const SUPPORTED_STRUCTURED_FORMATS: readonly ["ts", "tsx", "js", "rust", "graphql", "python", "go", "json", "toml", "yaml", "md", "xml"];
export type SupportedStructuredFormat = typeof SUPPORTED_STRUCTURED_FORMATS[number];
export declare const SUPPORTED_OUTLINE_FORMATS: readonly ["ts", "tsx", "js", "rust", "graphql", "python", "go", "json", "toml", "yaml", "md"];
export type SupportedOutlineFormat = typeof SUPPORTED_OUTLINE_FORMATS[number];
export declare function isSupportedLang(value: string): value is SupportedLang;
export declare function isSupportedStructuredFormat(value: string): value is SupportedStructuredFormat;
export declare function isSupportedOutlineFormat(value: string): value is SupportedOutlineFormat;
/**
 * Detect the tree-sitter language from a file suffix.
 * Returns null for unsupported file types.
 */
export declare function detectLang(filePath: string): SupportedLang | null;
/**
 * Detect the supported structured format for bounded read surfaces.
 * Returns null for file types that still have no explicit extractor.
 */
export declare function detectStructuredFormat(filePath: string): SupportedStructuredFormat | null;
/**
 * Detect formats that support outline extraction for bounded read surfaces.
 * Syntax-only formats, such as XML/SVG, intentionally return null here.
 */
export declare function detectOutlineFormat(filePath: string): SupportedOutlineFormat | null;
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