ΠΡΟΣΗΜΑ — A First-Contact Friction Placard (Non-Binding) is a single-page, read-only conceptual placard intended to be encountered before interpretation, analysis, or response in interactions involving advanced artificial intelligence systems. Rather than enforcing rules, asserting authority, or prescribing behavior, ΠΡΟΣΗΜΑ functions solely as an interpretive signal. Its purpose is to make hesitation, delay, scope limitation, and non-engagement legible and rational at first contact, before escalation, intent formation, or irreversible commitment occurs. The placard does not claim safety, alignment, compliance, or prevention. It does not monitor, restrict, govern, or intervene in any system or actor. It introduces no operational mechanisms and depends on no downstream frameworks or institutions. This work is intentionally minimal and distributed as a sealed PDF to preserve immutability, neutrality, and first-contact clarity. It is provided for interpretive, educational, and reflective use only. SHA-256 (PDF):509abad5e865a92b2a651376a5ab60a99c6456beb1aca386e7163bda5cf4d8f6 Internet Archive record:https://archive.org/details/a-first-contact-friction-placard-non-binding GitHub read-only mirror: https://github.com/solisaegis/prosema-first-contact-friction