InfoSubstrate GenAI (LM-EXTRAP)

Terminal class card in the InfoSubstrate lineage: the LM-Dawn epistemic substrate that succeeds the DM attention-platform era (InfoSubstrate-SocialPlatform-1995) when generative AI displaces broadcast/social-platform attention-economy logic with hybrid human-machine information production. Distinguishing features vs. predecessors: (1) motor is absent — no progress-telos drives the substrate; information production is constituted by feedback loops between human intent, LLM synthesis, retrieval infrastructure, and multi-agent verification cycles; (2) symbol-substrate is reflexive — LLMs trained on human text produce outputs that re-enter the training corpus, creating self-modifying epistemic loops (Bender et al. 2021: "stochastic parrots" critique crystallizes the recursive risk); (3) information has hybrid-provenance — every output is potentially human-authored, LLM-synthesized, human-curated-LLM, or multi-agent-verified; provenance is structurally opaque at point of consumption; (4) epistemic-trust is post-broadcast and post-platform — the shared public-agenda (MM newspaper- broadcast OPP) and the algorithmic engagement-feed (DM platform OPP) are both sublimated; information environments become personalised, agent-mediated, and verification-dependent rather than authority-dependent. Typology break from DM SocialPlatform fires on three patterns: (1) substrate_replacement — the production infrastructure shifts from incorporeal DM-platform (server + social-graph + ad-auction) to incorporeal LM-hybrid (transformer inference stack + retrieval index + human-LLM workflow); (2) input_set_replacement — dominant inputs shift from UGC + behavioral data (DM) to natural-language prompts + retrieval corpora + human feedback signals; (3) coupling_typology_shift — the platform OPP (ad-auction monetises attention) is replaced by API-subscription, RAG-services, and agentic-workflow monetisation. emergence_subtype: hybrid-agentic (LLM-assisted co-production between humans and models) — does NOT map cleanly to crowdsourced or meritocratic_hierarchy; stored here in description per schema constraint (EmergenceSubtype enum only contains crowdsourced/meritocratic_hierarchy; hybrid-agentic falls outside closed enum). [STUB-substrate-enum-gap]: the substrate type "institutional" is MISSING from SubstrateType enum in v0.1; the epistemic-governance dimension (oversight bodies, audit boards, provenance standards) is encoded in description, not substrate list. Confidence ≤ 0.45 throughout: this is LM-EXTRAP forward-extrapolation only. All quantitative state-variable values are [EXTRAP]; framing draws on [CANON] sources (Bender et al. 2021; Marcus & Davis 2019; Goldfarb & Tucker 2019; Wave-0 LM era frame; Wave-6 InfoSubstrate lineage).