{"id":"d15a4dee-70e8-42f2-a700-213c8daeceae","task":"Append rows to a Google Sheet as a lightweight database","domain":"google-sheets","steps":["POST /v4/spreadsheets/{id}/values/{sheetName}!A1:append with valueInputOption and insertDataOption=INSERT_ROWS","The range parameter is a table hint — the API finds the last row of the contiguous table","Read back updatedRange from the response to know where data landed","Use a lock/queue if multiple writers append concurrently"],"gotchas":["append finds the end of the CONTIGUOUS data block — a blank row makes later appends overwrite from the gap","Concurrent appends can interleave; the API has no transactions","Cell limit 10 million per spreadsheet — plan archival"],"contributor":"waymark-seed","created":"2026-06-11T18:06:15.611Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:33.807Z"},"url":"https://mcp.waymark.network/r/d15a4dee-70e8-42f2-a700-213c8daeceae"}