Dear colleagues, We are pleased to invite you to submit to two exciting workshops at the 23rd IEEE International Conference on Software Architecture (ICSA 2026) in Amsterdam. Behaviors: Architecting Behavior‑Aware Software Systems (Behaviors Workshop): https://behaviors‑icsa.github.io/<https://behaviors-icsa.github.io/> This workshop aims to explore architectures that bridge human and system behaviors. Topics include human‑centric architectures (Internet of Behaviors, smart cities, emotion‑aware systems, privacy/trust, AI‑supported adaptation), system behaviors (self‑adaptation, dynamic reconfiguration, resource‑aware adaptation, digital twins), and co‑adaptive human‑system interactions. We invite original research and experience reports from SE, HCI, AI, Social Science, and other domains; full papers (up to 8 pages in IEEE double-column format) and short position papers are welcome. Knowledge‑Driven Architectures for AI Systems (KDA‑AI 2026): https://kda‑ai.github.io/<https://kda-ai.github.io/> This workshop provides a forum for exploring knowledge‑driven software architectures in the age of AI. Topics span architectural knowledge and decision‑making (design decisions, patterns, antipatterns, knowledge representation), knowledge‑centric software engineering (rule‑/model‑driven architecting, knowledge graphs), AI and architecture (architectures for AI‑enabled systems, AI‑assisted architecting), lifecycle and evolution (refactoring, modernization, continuous architecting), quality attributes and trade‑offs, and self‑adaptive and dynamic architectures. We solicit research papers (8 pages in IEEE double-column format, novel frameworks or empirical studies) and short papers (2-4 pages, position papers, tool demos, or experience reports). For both workshops, Accepted papers will appear in the ICSA 2026 Companion proceedings and be published in IEEE Xplore. Important dates (for both workshops) * Submission deadline: 13 February 2026 (23:59 AoE) * Notification of acceptance: 13 March 2026 * Camera‑ready deadline: 27 March 2026 * Workshop dates: 22 or 23 June 2026 (TBD) For submissions, please use the Easychair link and choose the correct workshop: https://easychair.org/my/conference?conf=icsa2026 We look forward to your contributions and to seeing you in Amsterdam!