{ "schema": "varexis-index-free-publication-preview/1", "catalogue_version": "pub-5-tranche-55-v1", "route_id": "agentic_reviewed_intoto_link_reuse_layout_binding", "record_id": "VXI-EXT-PROCUREMENT-INTOTO-LINK-REUSE-LAYOUT-BINDING-01-v1", "question": "Does a signed in-toto link prove that a step ran freshly for one particular layout verification?", "answer": "The in-toto 1.0.0 specification does not bind link metadata directly to a particular layout and explicitly allows multiple layouts to use the same link during verification. A valid reused link can describe an earlier step. Fresh execution for a specific workflow therefore needs additional run identity and timing evidence beyond link acceptance.", "records": [ { "record_id": "VXI-EXT-PROCUREMENT-INTOTO-LINK-REUSE-LAYOUT-BINDING-01-v1", "url": "/varexis-index/records/intoto-link-reuse-layout-binding.json", "content_sha256": "d15f5199632d4c4a40701d7623af4b4afabae84156be42cad1f80848c4301d2a", "evidence": { "schema": "varexis-public-evidence-record/0.3", "generated_at_utc": "2026-10-24T23:11:13.073Z", "record_id": "VXI-EXT-PROCUREMENT-INTOTO-LINK-REUSE-LAYOUT-BINDING-01-v1", "record_kind": "external_reference", "title": "in-toto link reuse across layouts", "system": "in-toto specification v1.0.0", "evidence_family": "vendor_evidence_review", "index_status": "PUBLIC_SAFE_SOURCE_REVIEW", "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY", "canonical_question": "Does a signed in-toto link prove that a step ran freshly for one particular layout verification?", "near_questions": [ "Can one in-toto link be used by several layouts?", "Does successful in-toto verification mean the step just ran?", "What binds in-toto evidence to the current workflow execution?", "Can an old signed link satisfy a later layout verification?" ], "supported_claims": [ { "claim": "The in-toto 1.0.0 specification does not bind link metadata directly to a particular layout and explicitly allows multiple layouts to use the same link during verification. A valid reused link can describe an earlier step. Fresh execution for a specific workflow therefore needs additional run identity and timing evidence beyond link acceptance.", "reliance": "DOCUMENTED_CAPABILITY_ONLY" } ], "not_demonstrated_claims": [ "No actual execution time, replay policy or workflow run was verified.", "No verified business outcome, complete event capture, deployment certification or authority to act.", "Buyer deployment testing, live runtime enforcement, certification or permission to act", "Expanded capabilities or licences for existing INDEX executables" ], "public_summary": "The in-toto 1.0.0 specification does not bind link metadata directly to a particular layout and explicitly allows multiple layouts to use the same link during verification. A valid reused link can describe an earlier step. Fresh execution for a specific workflow therefore needs additional run identity and timing evidence beyond link acceptance.", "related_record_ids": [], "source_review": { "source_type": "official_external_documentation", "source_title": "in-toto specification v1.0.0 — in-toto-spec", "source_url": "https://raw.githubusercontent.com/in-toto/specification/6459afd8e94a332e423ba05c2862b534acbe741d/in-toto-spec.md", "checked_on": "2026-10-24", "candidate_record_id": "VXI-EXT-PROCUREMENT-INTOTO-LINK-REUSE-LAYOUT-BINDING-01-v1", "candidate_record_sha256": "df1217c72886ee3a048851ade997772e76bc41f091d0fee647aa1e3edf345ad0", "method": "Primary documentation reviewed for the published bounded statement.", "deployment_tested_by_varexis": false, "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research." }, "answer_policy": { "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY", "bounded_answer": "The in-toto 1.0.0 specification does not bind link metadata directly to a particular layout and explicitly allows multiple layouts to use the same link during verification. A valid reused link can describe an earlier step. Fresh execution for a specific workflow therefore needs additional run identity and timing evidence beyond link acceptance.", "required_buyer_context": "Link identity and originating execution context; Layouts in which the link was used; Current workflow run and freshness requirements. Buyer deployment not inspected.", "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state." }, "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.", "decision_profile": { "schema": "varexis-vendor-evidence-review/1", "review_status": "documentation_review_only", "checked_on": "2026-10-24", "claim_to_check": "Does a signed in-toto link prove that a step ran freshly for one particular layout verification?", "documented_statement": { "status": "documented", "statement": "The in-toto 1.0.0 specification does not bind link metadata directly to a particular layout and explicitly allows multiple layouts to use the same link during verification. A valid reused link can describe an earlier step. Fresh execution for a specific workflow therefore needs additional run identity and timing evidence beyond link acceptance.", "source_ids": [ "intoto-spec" ] }, "review_inference": { "status": "review_inference", "statement": "Distinguish reusable step evidence from a fresh execution receipt for the current run. This is a review judgment, not an observed execution or deployment result.", "source_ids": [ "intoto-spec" ] }, "buyer_evidence_required": [ "Link identity and originating execution context", "Layouts in which the link was used", "Current workflow run and freshness requirements" ], "review_condition": { "status": "varexis_review_policy", "statement": "Refuse fresh-run or single-layout execution claims from a reusable link alone." }, "unknowns": "No actual execution time, replay policy or workflow run was verified.", "unknown_finding": { "status": "unknown", "statement": "No actual execution time, replay policy or workflow run was verified." }, "evidence_sources": [ { "source_id": "intoto-spec", "url": "https://raw.githubusercontent.com/in-toto/specification/6459afd8e94a332e423ba05c2862b534acbe741d/in-toto-spec.md", "final_url": "https://raw.githubusercontent.com/in-toto/specification/6459afd8e94a332e423ba05c2862b534acbe741d/in-toto-spec.md", "status": 200, "captured_at_utc": "2026-10-24T22:53:31.042Z", "sha256": "dc5cdd7086397efd402262ee966035d9ff0854f777dfa3b925e635c179898340", "bytes": 93385, "title": "in-toto specification v1.0.0 — in-toto-spec", "hash_basis": "Decoded HTTP response body bytes", "rights_review": "Original bounded paraphrase; source bodies are captured privately and not redistributed. Repository MIT licence reviewed.", "checked_on": "2026-10-24", "capture_status": 200, "claim_review_completed": true, "reviewed_sections": [ "4.3.1 Steps: expected_command", "4.4 Byproducts; 4.3.2.1 Inspection interface", "4.3.2 Inspections; 5.2 verification workflow", "4.3.3.1 Rule processing", "4.3.3.1 Sequential rule processing; 4.3.3.3 DISALLOW", "4.3.3.2 MATCH; 4.3.3.3 error-producing rules", "4.3.3 Artifact rules: MODIFY", "4.3 EXPIRES; 5.2 expiry verification", "3.1.2 Link metadata reuse", "4.5.1 Artifact rules in sublayouts; 4.5.3 inspections", "4.5.3 Inspections on sublayouts", "4.5.2 Namespacing link metadata" ], "version_context": "in-toto specification 1.0.0 (2023-06-02), pinned revision; pinned in-toto/specification revision 6459afd8e94a332e423ba05c2862b534acbe741d. Source documentation is not independent evidence of buyer deployment behaviour." } ], "observed_deployment": false, "commercial_reliance_boundary": "Documentation review only; the buyer must establish applicability and actual outcomes. INDEX does not inspect or control the deployment.", "paid_value": { "decision_context": "Distinguish reusable step evidence from a fresh execution receipt for the current run.", "free": "Complete review, sources, practical questions and limitations; may be saved locally.", "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.", "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.", "excluded": [ "Fresh vendor research", "Continuous monitoring or change alerts", "Testing the buyer configuration", "Private evidence or vendor certification" ], "integrity": "Hashes identify content versions; they do not prove truth or provide a signature." }, "revalidation": { "trigger": "A saved purchase does not recheck the source or buyer configuration.", "specific_watch": "Recheck the pinned source, deployed version, selection policy and retained operation results before relying on a current outcome." }, "buyer_relevance": "Distinguish reusable step evidence from a fresh execution receipt for the current run.", "refusal_conditions": [ "Refuse fresh-run or single-layout execution claims from a reusable link alone." ] }, "niche": { "niche_id": "agent-authority-action-evidence", "label": "Agent Authority & Action Evidence", "classification_id": "audit", "classification_label": "Audit, Provenance & Evidence Accountability", "topic_id": "audit", "buyer_intent": "Distinguish reusable step evidence from a fresh execution receipt for the current run.", "comparison_role": "supplementary_discovery" }, "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.", "service_route": { "request_guide": "/varexis-index/request.html", "request_workflow": "/varexis-index/request-workflow.json", "service_id": "single_request", "service_routes_url": "/varexis-index/service-routes.json", "payment_required": true, "availability_endpoint": "/api/index/capabilities", "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED", "checkout_url": "/index-access" }, "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.", "human_page": "/varexis-index/catalog.html#intoto-link-reuse-layout-binding", "machine_readable_record": "/varexis-index/records/intoto-link-reuse-layout-binding.json" } } ], "access": { "mode": "exact_http_only", "payment_required": false, "purchase_url": null, "mcp_preview_available": false, "paid_saved_retrieval_available": false, "natural_language_search_qualified": false }, "boundary": "Catalogue additions are available free through the exact HTTP JSON links below. Enhanced natural-language discovery is not yet qualified for these records. They are outside MCP search, MCP preview and paid saved retrieval. No search qualification, executable capability or entitlement is added.", "content_sha256": "c06459db3121d39cf2afe812b4e80cdf86c0a124eaca3dcaaca0043c7437ac3b" }