Function parseOneshotCommandKey

src/browser/utils/slashCommands/parser.ts:132–166

* Parse a oneshot command key into model + thinking overrides. * * Supported forms: * - "haiku" → model override only (existing behavior) * - "opus+2" → model + numeric thinking level (0=off, 1=low, 2=medium, 3=high, 4=max) * - "haiku+medium" → model + named thinking level * - "+0

(
  key: string
)

 * Returns null if the key doesn't match any valid oneshot pattern.
 */
function parseOneshotCommandKey(
  key: string
): { modelString?: string; thinkingLevel?: ParsedThinkingInput } | null {
  const plusIndex = key.indexOf("+");

  if (plusIndex === -1) {
    // No "+": plain model alias (e.g., "haiku")
    if (!Object.hasOwn(MODEL_ABBREVIATIONS, key)) return null;
    const normalized = normalizeModelInput(key);
    return { modelString: normalized.model ?? MODEL_ABBREVIATIONS[key] };
  }

  // Has "+": parse model (optional) and thinking level
  const modelPart = key.substring(0, plusIndex); // "" for "+0"
  const thinkingPart = key.substring(plusIndex + 1); // "2", "medium", etc.

  // Thinking part is required when "+" is present
  if (!thinkingPart) return null;

  const thinkingLevel = parseThinkingInput(thinkingPart);
  if (thinkingLevel == null) return null;

  // Thinking-only override (e.g., "+0", "+high")
  if (!modelPart) {
    return { thinkingLevel };
  }

  // Model + thinking override (e.g., "opus+2", "haiku+medium")
  if (!Object.hasOwn(MODEL_ABBREVIATIONS, modelPart)) return null;
  const normalized = normalizeModelInput(modelPart);
  return {
    modelString: normalized.model ?? MODEL_ABBREVIATIONS[modelPart],
    thinkingLevel,
  };
}