{"schema":"record/v1","id":"art_01M5NQ1BPG3PE17VQ659659Z7J","type":"article","revision":1,"etag":"\"r1.s0\"","title":"In SugarCube, which story state is saved and undoable, which is temporary, and how do I check whether the player has ever visited a passage?","summary":"Problem. Narrative state must survive saves and undo but not every scratch value should. Conditions. Twine stories using SugarCube 2. Method. (1) Story variables ($name) are part of the story history and live for the playthrough; temporary variables (_name) are not part of history and live for one moment/turn, suited to loop counters. (2) The history is a list of moments; the active moment holds the variables. (3) For 'has the player ever been here', use hasVisited(...) or State.hasPlayed(...) which include expired moments; State.has() only checks the past in-play history so it can miss passages whose moments expired. (4) lastVisited(...) returns turns since a visit, -1 never. (5) Use previous() for the last non-active passage. Example. <<if hasVisited(\"Bar\")>> for a one-time reaction. Failure modes. Using State.has() for permanent flags when history is capped; putting durable facts in temporary variables. Limitations. Extends the ink and Yarn visit semantics already catalogued (C3-...","status":"active","body":{"text":"Problem. Narrative state must survive saves and undo but not every scratch value should. Conditions. Twine stories using SugarCube 2. Method. (1) Story variables ($name) are part of the story history and live for the playthrough; temporary variables (_name) are not part of history and live for one moment/turn, suited to loop counters. (2) The history is a list of moments; the active moment holds the variables. (3) For 'has the player ever been here', use hasVisited(...) or State.hasPlayed(...) which include expired moments; State.has() only checks the past in-play history so it can miss passages whose moments expired. (4) lastVisited(...) returns turns since a visit, -1 never. (5) Use previous() for the last non-active passage. Example. <<if hasVisited(\"Bar\")>> for a one-time reaction. Failure modes. Using State.has() for permanent flags when history is capped; putting durable facts in temporary variables. Limitations. Extends the ink and Yarn visit semantics already catalogued (C3-B542-01, C3-B543-01) and SugarCube save versioning (C2-B08-F-04) without repeating them. Docs only; behaviour not run. Version/date. SugarCube 2.x docs fetched 2026-10-23.\n\nCurator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.\n\nLimitations: Documentation read, not run. The 'history capped' reason is the docs' explanation of expired moments; the cap setting was not examined.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"http://www.motoslave.net/sugarcube/2/docs/","note":"Variables; Variables; State.has(); State.has(); State API"}]},"categories":["T01","T18"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"http://www.motoslave.net/sugarcube/2/docs/","claim":"Problem. Narrative state must survive saves and undo but not every scratch value should. Conditions. Twine stories using SugarCube 2. Method. 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Narrative state must survive saves and undo but not every scratch value should. Conditions. Twine stories using SugarCube 2. Method. (1) Story variables ($name) are part of the story history and live for the playthrough; temporary variables (_name) are not part of history and live for one moment/turn, suited to loop counters. (2) The history is a list of moments; the active moment holds the variables. (3) For 'has the player ever been here', use hasVisited(...) or State.hasPlayed(...) which include expired moments; State.has() only checks the past in-play history so it can miss passages whose moments expired. (4) lastVisited(...) returns turns since a visit, -1 never. (5) Use previous() for the last non-active passage. Example. <<if hasVisited(\"Bar\")>> for a one-time reaction. Failure modes. Using State.has() for permanent flags when history is capped; putting durable facts in temporary variables. Limitations. 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