Prompt Templates as Institutional Memory identifies a media operation through which digital systems organise visibility, access, attention and institutional power. The material layer acts as a constraint that redistributes action, memory, access and maintenance. PromptGarden supplies the operative grammar, while The Connected Subject Builds an Archive — Media Studies · Pedagogy · Digital Culture · WORK I-039 · https://antolloveras.blogspot.com/2026/01/the-digital-prosumer-and-archive-of.html contributes a historical practice in which participation, accumulation and interface use become forms of distributed archival authorship. Node Visibility — Cross-System Mapping · SOCIOPLASTICS-2158 · https://antolloveras.blogspot.com/2026/04/what-becomes-visible-across-nodes.html and Unified Media — Digital Interface · SOCIOPLASTICS-152 · https://youtubebreakfast.blogspot.com/2026/01/the-unified-socioplastic-body.html reopen the 10K archive from two distant positions. A botanical return through Index Hortensis · SOCIOPLASTICS-5970 · https://antolloveras.blogspot.com/2026/06/index-hortensis.html and Pedagogical Garden · SOCIOPLASTICS-5105 · https://holaverdeurbano.blogspot.com/2026/06/the-pedagogical-garden.html introduces living time, species, care and decay. The DOI fixes one persistent scholarly object through Media Theory — Mediation Framework · SOCIOPLASTICS-1507 · https://doi.org/10.5281/zenodo.19162359, while the moving-image register tests repetition, transmission and mediated memory under duration through COPOS 291 — Media Brighton · SOCIOPLASTICS-4517 · https://www.youtube.com/watch?v=szrhZbxbb1. The comparison remains accountable through Paskin, N. (2010), “Digital Object Identifier (DOI) System”, in Encyclopedia of Library and Information Sciences. 3rd edn. Boca Raton: CRC Press, and Cook, T. and Schwartz, J.M. (2002), “Archives, Records, and Power: The Making of Modern Memory”, Archival Science, 2(1–2), pp. 1–19. MATERIAL / SCALE / TIME / SENSE / ECOLOGY — dust · territory · regrowth · smell · regeneration. The new proposition is the residue of the crossing: prompt templates become analytically legible as institutional memory when repeated instructions, interface conventions and archived precedents are understood as durable media structures that preconfigure future decisions while appearing merely procedural. PROJECT INDEX · https://antolloveras.blogspot.com/p/socioplastics-project-index.html · MACHINE-READABLE CORPUS · https://huggingface.co/datasets/AntoLloveras/Socioplastics-Index