/**
 * Dependency-free ANSI escape-sequence primitives.
 *
 * These live in their own leaf module (no logger/db/server imports) so both
 * server-side detection code (`cli-patterns.ts`, which re-exports them) and
 * client components (the terminal display normalizer, Issue #1172) can share the
 * exact same tested pattern without pulling Node-only modules into the browser
 * bundle.
 *
 * Covers:
 * - SGR sequences: ESC[Nm (colors, bold, underline, etc.)
 * - OSC sequences: ESC]...BEL and ESC]...ST (ESC \\) - window title, and the
 *   OSC 8 hyperlinks that claude/codex/copilot emit (Issue #1912). Also
 *   available on its own as {@link stripOsc} (Issue #2369), for a consumer that
 *   renders SGR and must not render OSC.
 * - CSI sequences: ESC[...letter (cursor movement, erase, etc.)
 *
 * Known limitations (SEC-002): 8-bit CSI (0x9B), DEC private modes (ESC[?25h),
 * character-set switching (ESC(0), and some RGB color forms may not match. In
 * practice tmux capture-pane output rarely contains these.
 */
/** {@link OSC_SOURCE} as a reusable global pattern. */
export declare const OSC_PATTERN: RegExp;
export declare const ANSI_PATTERN: RegExp;
/** Remove all ANSI escape sequences from a string. */
export declare function stripAnsi(str: string): string;
/**
 * Remove OSC sequences only, leaving SGR (colour) and CSI untouched.
 *
 * For OSC 8 hyperlinks — `ESC ] 8 ; ; <url> ST <label> ESC ] 8 ; ; ST` — this
 * drops both halves of the pair and keeps `<label>`, which is the text the
 * terminal itself shows. See {@link OSC_PATTERN} for who needs this and why
 * `stripAnsi` is not the answer for them.
 */
export declare function stripOsc(str: string): string;
/**
 * Extract the ANSI escape sequences from a string, in order, discarding all
 * other characters. Reuses the same tested pattern as {@link stripAnsi} so the
 * two stay in lock-step. Used when collapsing blank layout rows for display
 * (Issue #1172): the visible glyphs are dropped but any color/reset sequences
 * that alter how subsequent rows render must be preserved.
 */
export declare function extractAnsiSequences(str: string): string;
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