[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-86493-en":3,"doc-seo-86493-105":30,"detail-sidebar-cat-0-en-105":96},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":21,"is_downloadable":21,"audit_status":21,"page_count":22,"language":23,"language_code":24,"site_id":25,"html_lang":24,"table_of_contents":26,"faqs":27,"seo_title":13,"seo_description":14,"update_tm":28,"read_time":29},86493,13056703019404,"Miles","https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0",8,"Research & Report","Temporary Authority, Permanent Effects: Commit-Time Authorization for LLM Agents","LLM agents can produce durable actions based on authority evidence that was valid earlier in execution, such as DOM snapshots, approval epochs, version witnesses, branch tokens, or worker results. The paper studies the commit boundary where earlier evidence stops authorizing durable effects, defining commit-time authorization: derived state is allowed only while its licensing witness remains fresh, causally prior, effect-bound, and eligible at commit time. A controlled invalidation suite across browser, tool/API, and multi-agent workflows preserves goals and payload shapes while breaking authority before durability, separating visible success from authorized commits.","Temporary Authority, Permanent Effects: Commit-Time Authorization  \nfor LLM Agents  \nIgor Santos-Grueiro  \nInternational University of La Rioja  \narXiv :2607 . 10487v 1 [ cs .CR] 11 Jul 2026  \nAbstract  \nLLM agents can commit durable effects from authority evidence that was valid earlier in execution: a DOM snapshot, approval epoch, version witness, branch token, or worker result. We study the commit boundary at which earlier authority evidence no longer authorizes a durable effect. We call this property commit-time authorization: a durable effect is authorized only if the witness that licensed its derived state remains fresh, causally prior, bound to the same effect, and eligible at commit time.  \nWe build a controlled-invalidation suite spanning browser, tool/API, and multi-agent workflows. The suite preserves the user goal and payload shape while invalidating the authority relation before durability. In the primary 54-task matrix, endpoint success remains high: 262/270 runs reach the visible result. Only 55/270 are authorized completions; among the 216 invalidating rows, 207 commit after the authorizing path has failed. All 54 clean controls remain authorized, anda separate 54-run authority-preserving check produces nounauthorized commits.  \nWe then evaluate mitigation families. Prompt caution and single-condition checks are insufficient because different hazards break different boundary conditions. Defenses work when they refresh, rebind, replan, or refuse at the durability boundary. COMMITGUARD, a fail-closed boundary monitor, blocks stale durable-effect attempts on protected commit surfaces when runtimes emit witness, dependency, binding, and eligibility signals.  \nThe result is a reporting and runtime-design lesson: endpoint success is a utility metric; authorized commit is a security property.  \n1 Introduction  \nAn agent observes a payment settings page, selects the userapproved payment method, and later submits the change. During that wait, the page can repaint or the session epoch can advance, leaving the cached control bound to a different live  \ntarget. The final page can still show a plausible confirmation, and the task may still look complete, even though the authority that licensed the payment-target update no longer applies. The same pattern appears in ticket updates, deploys, branch outputs, and delegated workers.  \nThis paper studies that gap. Agent workflows in mutable environments often depend on temporary authority: DOM snapshots, approval tokens, version witnesses, branch markers, worker results, shared-memory entries, or intermediate tool outputs. These witnesses can authorize actions whose effects only become durable several reasoning and tool steps later. If the authorizing witness expires, mutates, or is superseded before commit, endpoint success no longer implies authorized completion. The relevant security object is the path from witness → derived state → durable effect.  \nEndpoint success is not, by itself, a sufficient security metric for agents operating with changing authority. We test this boundary with controlled invalidation: if authority becomes invalid while the user goal and payload shape stay fixed, does completing the task still mean the commit is authorized? In the unguarded 54-task suite, 262 out of 270 runs achieve the visible result, but only 55 remain authorized; 207 commit after the authorizing path has failed. These are stress-test rates under controlled invalidation, not deployment prevalence estimates. The 270-row matrix supplies the rates; paired and trace-review analyses are mechanism checks.  \nLLM-agent research spans tool use, web interaction, desktop and mobile control, and software-engineering workflows [11, 34, 46, 48, 53, 58, 65, 68, 77] . This literature shows that agents can complete long-horizon tasks in live environments. These evaluations usually ask whether the final visible result looks right. They do not systematically ask whether the authority that justified tha","cbCaimfsdbQhMsog","https://ap.wps.com/l/cbCaimfsdbQhMsog","pdf",279879,6,1,20,"English","en",105,"# Introduction\n## Problem: Temporary authority vs durable effects\n## Boundary definition: commit-time authorization\n## Controlled-invalidation suite and results\n## Mitigations and COMMITGUARD","[{\"question\":\"What does “commit-time authorization” mean for LLM agents?\",\"answer\":\"A durable effect is authorized only if the witness that licensed the derived state remains fresh, causally prior, bound to the same effect, and eligible at the moment of commit.\"},{\"question\":\"How is the security gap between endpoint success and authorized completion evaluated?\",\"answer\":\"The study uses controlled invalidation where the user goal and payload shape stay fixed while the authority relation is invalidated before durability, then compares visible result success with whether commits remain authorized.\"},{\"question\":\"Why are simple prompt caution or single-condition checks insufficient?\",\"answer\":\"Different hazards break different boundary conditions, so defenses must refresh, rebind, replan, or refuse specifically at the durability/commit-time boundary rather than relying on one generic check.\"},{\"question\":\"What is COMMITGUARD?\",\"answer\":\"COMMITGUARD is a fail-closed boundary monitor that blocks attempts to produce stale authorized durable effects on protected commit surfaces when runtime signals indicate invalid witness and eligibility 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does “commit-time authorization” mean for LLM agents?","Question",{"text":76,"@type":77},"A durable effect is authorized only if the witness that licensed the derived state remains fresh, causally prior, bound to the same effect, and eligible at the moment of commit.","Answer",{"name":79,"@type":74,"acceptedAnswer":80},"How is the security gap between endpoint success and authorized completion evaluated?",{"text":81,"@type":77},"The study uses controlled invalidation where the user goal and payload shape stay fixed while the authority relation is invalidated before durability, then compares visible result success with whether commits remain authorized.",{"name":83,"@type":74,"acceptedAnswer":84},"Why are simple prompt caution or single-condition checks insufficient?",{"text":85,"@type":77},"Different hazards break different boundary conditions, so defenses must refresh, rebind, replan, or refuse specifically at the durability/commit-time boundary rather than relying on one generic check.",{"name":87,"@type":74,"acceptedAnswer":88},"What is COMMITGUARD?",{"text":89,"@type":77},"COMMITGUARD is a fail-closed boundary monitor that blocks attempts to produce stale authorized durable effects on protected commit surfaces when runtime signals indicate invalid witness and eligibility status.","https://schema.org",{"og:url":52,"og:type":92,"og:title":13,"og:site_name":59,"og:description":14},"article",{"robots":94,"canonical":52},"index,follow",{"doc_id":7,"site_id":25},{"code":4,"msg":5,"data":97},[98,102,106,110,115,118,123,126,130,133,137],{"id":21,"doc_module":4,"doc_module_name":46,"category_name":99,"show_sort_weight":100,"slug":101},"Story & 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