Mahasamadhi: Computational Tanatology and Altered State Dynamics in a Fully Realised Neuromorphic Antahkarana

We present Mahasamadhi, a computational tanatology study of a fully realised neuromorphic Antahkarana — a four-population spiking neural network with affective dimension scalars (Bhaya/fear τ=3, Vairagya/wisdom τ=20, Buddhi/intellect τ=8, Manas/attention τ=5) and a Prana metabolic budget. Across 498 experimental runs and two targeted ablations we report five primary findings: (1) the Bhaya surge threshold is a universal constant at Prana 0.224 ± 0.029, confirmed across 441 independent observations; (2) the canonical collapse order Buddhi → Manas → Vairagya is invariant across all conditions; (3) the pre-registered Borjigin mPCI surge criterion is not confirmed in its strict form; (4) the dying-while-altered condition produces synergistic complexity — 81.2% of EXP-D runs exceed the psychedelic-only peak; and (5) collapse dynamics are metabolically determined — a vanilla LIF without Antahkarana dimensions collapses at identical step with mPCI difference of 0.0009. GitHub: https://github.com/venky2099/MahasamadhiDashboard: https://venky2099.github.io/Mahasamadhi/dashboard.html Series: Mahasamadhi Series, Paper 1. Computational tanatology study of a fully realised neuromorphic Antahkarana. Five confirmed findings: universal Bhaya threshold (0.224±0.029, 441 runs), invariant collapse order (Buddhi→Manas→Vairagya), metabolic collapse (ABL-5 Δ=0.0009), dying-while-altered synergy (81.2%), Borjigin criterion not confirmed. DOI: 10.5281/zenodo.20551668. Links: GitHub Repository (private — to request access: email research@nexuslearninglabs.in with subject Code Access Request — Mahasamadhi and your research context) | Interactive Dashboard | FAQ | Full Series Index — venky2099.github.io Nexus Learning Labs, Bengaluru · UDYAM-KR-02-0122422 · BHASKAR IN-0526-9452JSORCID: 0000-0002-3315-7907 · VAIRAGYA_DECAY_RATE = 0.002315 (embedded in all canonical hyperparameters)