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Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
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REPORT — v0.275.0: a backup's data and its version travel together (2026-09-26/27)
Brief: version-travel (Parts A, D2–D4). Architecture: 07-backup-architecture.md §6 (+ new §6.6), 09 §3, §5.3, §6.4.
Session record: felhom.eu/documentation/audits/DRILL-version-travel-2026-09-26.md.
Baseline: main fb2bcdd5d619, v0.274.0, floor 0.274.0. Commits: b6810f1 (Part A, R-695, R-691 (1), R-694),
7fcda8f (R-699, found live). Released: image 0.275.0 (rc 0.275.0-rc1 for the live proofs); floor 0.275.0 with
MinAgent 0.131.0 — both demo boxes on 0.275.0 within 15 s (audits/version-travel-2026-09-26/R/); 9202 by hand (scratch).
Tests: full suite green (go build/vet/test ./... rc=0) after the last change; controller gates all OK. New tests:
internal/backup/a_version_travel_test.go (15), internal/stacks TestA5_TheReleaseRefusesAPreConversionDump,
TestA4_AnOldRecordWithoutAServiceChecksEveryPostgresImage, TestA3_RestoredVersionPosition, TestR695_*, TestR694_*,
internal/web TestA3_RestoredVersionSentence, TestR695_*, TestR691_* (2), TestR694_*; new parity fixture
deploy_deployed_restored_login. Two AST fixture names updated (TestAdmission_IsWiredIntoEveryProductionWriteLeg).
Red-proofs (each seen failing, tree restored) — felhom.eu/documentation/audits/version-travel-2026-09-26/:
RP1 Tier 1 time = manifest ("the refresh 1s made a two-hour-old dump read as new"); RP2/RP2b the refresh rewrites
compose/ (the restore started 16 data with postgres:18); RP3 no version check (mismatch/mixed restored); RP4 the
release on a pre-conversion dump ("released [nextcloud]; copies=0"); RP5 off-site uses the live definition; RP6 R-699 (a
dump-less unit accepted); D2 R-695 ×2; D3 R-691 ×2; D4 R-694.
Live (endpoint level, 9202): A5-live/README.md — both shapes restore the old version whole and climb again; the box's
own night showed the frozen definition and the data-time restore point.
NOT yet live-validated: the off-site restore's definition write; the conversion-copy release on a real 18 dump (due after 9202's next nightly backup); R-691 (1) with a real 0770 folder; the English restore sentence.