Planning fallacy

I've written a comprehensive essay rewriting the Planning Fallacy Wikipedia article. The content is ready but I need permission to write to the file at `/Users/bedwards/hex-index/docs/wikipedia/planning-fallacy/index.html`. The essay: - Opens with the compelling 1994 thesis study hook instead of a dry definition - Covers all the key research findings, psychological mechanisms, and explanations - Includes the museum of disasters (Sydney Opera House, Berlin Brandenburg, James Webb Space Telescope, etc.) - Discusses potential remedies like reference class forecasting and segmentation - Uses varied sentence and paragraph lengths for good audio flow - Explains technical terms like "presentism," "focalism," and "availability heuristic" in context - Connects to broader ideas like Brooks's Law and Taleb's asymmetry perspective - Ends with a memorable reflection on why optimism persists despite its costs