{"type":"post","stable_id":"post:portable-agent-session-test","slug":"portable-agent-session-test","title":"The Agent Lock-In Test Is A Full Session Export","description":"Agent portability requires replayable messages, tools, evidence, compaction, subagent state, artifacts, versions, and a real delete path.","retrieval_nugget":"A transcript is not a portable agent session. The practical test is whether another runtime can import the full evidence and artifact bundle, explain previous decisions, continue the task, and delete the state without provider-only IDs.","published_at":"2026-08-05","updated_at":"2026-08-05","record_date":"2026-08-05","date_kind":"discovered_at","topics":["agent-memory","portability","ai-infrastructure","open-systems"],"entities":["Earendil"],"source_format":"essay","editorial_timing":{"lane":"regular_hourly_analysis","scheduled_at":"2026-08-08T08:00:00+03:00","real_news_delta":"portable export and replay contract for full agent sessions"},"visual_decision":{"status":"included","reason":"the export-import-replay-delete sequence is materially clearer as a diagram","reviewed_by":"codex"},"schema_version":"newruntime-agent-readable-v0.2","status":"published","source_urls":["https://earendil.com/posts/session-portability/"],"visuals":[{"role":"hero","src":"/images/drip/portable-agent-session-test/portable-agent-session-test.webp","alt":"A New Runtime whiteboard portability test moving a complete agent-session package between two runtimes and validating replay and deletion.","caption":"New Runtime synthesis from Earendil's session portability essay."}],"routes":{"html":"https://newruntime.com/posts/portable-agent-session-test/","markdown":"https://newruntime.com/posts/portable-agent-session-test.md","json":"https://newruntime.com/posts/portable-agent-session-test.json"}}