A 1M context window is not a free upgrade
A 1M context window sounds like a free upgrade. It is not.
The bill and the latency climb with every dumped file, and the soft middle of a giant window still loses the lines that matter. Dumping the whole repo into GPT-6 Astra is how you burn frontier money for a worse answer.
Retrieval beats a bigger window. Measure what you keep, what you fetch, and what you refuse to paste.
