{"ontology":"https://layer.re/machine/schema.json","epistemic_model":"evidence-backed-temporal-layer-graph","canonical":true,"type":"machine_reading_contract","schema_version":"1.0","description":"Layer.re is an evidence-backed temporal world model. It stores canonical observations and explicitly qualified interpretations, preserves their evidence paths, and reconstructs historical state without leaking later knowledge backward in time.","current_world_rule":"The current CivilizationSnapshot is the head/synthesis of the latest material transition, not the complete current world. The complete current world is the current CivilizationSnapshot plus the latest canonical LayerStateSnapshot for every active layer.","reading_order":["https://layer.re/machine/context.json","https://layer.re/machine/current-world.json"],"interpretation":{"observed_facts":"Records with epistemic_status=observed_fact report what canonical evidence directly supports.","supported_inference":"Records with epistemic_status=supported_inference are interpretations supported by evidence; they are not observations and must remain distinguishable from observed facts.","confidence":"Confidence is a bounded assessment attached to a record, not a substitute for its epistemic status or evidence trace.","uncertainty":"Uncertainties and competing interpretations are part of the canonical reading and must not be silently resolved by a client.","relation_onset_caution":"A relation's valid_from or first supported evidence date is not necessarily its real-world onset. Respect onset_status, left_censored, evidence_first_seen_at and temporal_note.","vendor_claim_caution":"Vendor or actor claims are claims by that actor unless independently evidenced; do not promote them to observed facts.","historical_no_future_leakage":"Historical reads include only records knowable at the requested time. Retrospective mappings are labelled and must not be treated as contemporaneous knowledge."},"endpoints":{"current_world":"https://layer.re/machine/current-world.json","stack_json_backwards_compatible":"https://layer.re/machine/stack.json","stack_text_backwards_compatible":"https://layer.re/machine/stack.txt","civilization":"https://layer.re/api/civilization/snapshot","layer":"https://layer.re/api/v1/layers/{slug}","delta":"https://layer.re/api/v1/delta?from={ISO_DATE}&to={ISO_DATE}","snapshot_comparison":"https://layer.re/api/v1/compare?from={snapshot_id}&to={snapshot_id}","evidence":"https://layer.re/api/v1/evidence/{canonical_id}?type={entity_type}","public_mcp":"https://layer.re/mcp-public"}}