/**
 * Context-window denominator resolution for the widget's health bar
 * (agent-frames capability, design D9).
 *
 * The health bar shows context headroom: `1 - contextTokens / window`.
 * The numerator comes from session-file usage (`SessionAnalysis.contextTokens`);
 * the denominator is resolved here from a small per-model pattern table with a
 * conservative default. The percentage is advisory presentation state, never a
 * lifecycle input — when the table is stale we prefer UNDER-reporting headroom
 * (a smaller assumed window), and the displayed value is clamped to 0–100%.
 */
/**
 * Conservative default context window (tokens) for unknown models.
 * Deliberately small-ish: an unknown model's health bar should exhaust
 * early (alarming) rather than late (falsely reassuring).
 */
export declare const DEFAULT_CONTEXT_WINDOW = 128000;
/**
 * Resolve the context window (tokens) for a model id.
 * Unknown or missing model ids fall back to the conservative default.
 */
export declare function resolveContextWindow(model?: string): number;
/**
 * Compute the context-headroom percentage (0–100, integer) for a usage
 * reading against the model's resolved window. Clamped so stale table
 * entries can never render a negative or >100% bar.
 *
 * A positive `windowOverride` — a REAL per-session window reported by the
 * harness's session format (codex `model_context_window`) — is preferred
 * over the static table lookup.
 */
export declare function contextHeadroomPercent(contextTokens: number, model?: string, windowOverride?: number): number;
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