[jeremydmiller]

Moves Marten onto Bobcat 1.0.0-rc.1 (nuget.org, 2026-10-18).

Pins

Directory.Packages.props: BobcatVersion 1.0.0-alpha.1 → 1.0.0-rc.1. That one property sets Bobcat, Bobcat.Generators, Bobcat.Xunit (DaemonTests and DaemonTests.ManualOnly) and Bobcat.Supervisor (build/).

Nothing else moved:

• xunit.v3 4.0.2 / runner 4.0.1 (BobcatXunitV3Version): DaemonTests is already on the line rc.1 needs.
• JasperFx 2.90.2 VersionOverride in build/build.csproj: rc.1 has the same floor as alpha.1 (2.90.2), so it stays, as bobcat#693's docs describe. Marten's own pins stay at 2.90.1. No NoWarn NU1605.

Changes and why

1. Removed build/'s own fresh-process retry policy (RetryOptedInTestsInFreshProcess, from Supervised CI on Bobcat 0.60.4: worker lanes, per-lane databases, opt-in retries, committed ledger (bobcat#565) #5687). Bobcat 1.0's DefaultFailurePolicy now retries a Retry-tagged test in a fresh process by default (bobcat#661). Isolated=true was already fresh-process. Behaviour is the same as before: retries stay opt-in, the ceiling is 3 attempts with 25 retries per run, and --disable-test-retry still turns them off. Only a [Trait("RetryWarm","true")] would retry warm, and nothing in Marten has one. The one Retry trait in the repo (Bug_catching_up_should_catch_marten_command_exceptions) gets a fresh process, as it did before.
2. Removed the display-name ledger workaround (LaneDurations and the Supervisor.TestFilter hook, plus re-keying earlier observations onto this run's uids). Bobcat now keys TestLedger and KnownDurations() by display name itself (bobcat#730). It re-keys an older uid-keyed ledger when it loads one, and prints Known durations matched N/M at the top of the run report. SupervisedTests.cs logs results.DurationCoverage in place of its own matched count.
3. The ledger is now a CI artifact. The committed build/test-ledger/ and --update-test-ledger are gone. Each test job downloads the folded-test-ledgers artifact from the newest successful master run into artifacts/previous-test-ledger/ and balances its lanes on it. The roll-up job already gathers each job's folded ledger into that artifact. The workflow gains permissions: actions: read so the download can run. The step is best-effort: with no ledger, lanes balance by test count and the report says so.
   • Why the committed ledger was dropped: it only held EventSourcing and Linq. CI always gets fresher data from the previous master run, and keeping the file current would mean a commit every time. All it bought was duration balancing on a laptop's first run, and --previous-test-ledger <dir> pointed at a downloaded artifact covers that.
   • Retention moves from 3 to Bobcat's default of 5 runs per test. A test no run has seen for 30 days is pruned (PruneTestsNotSeenSince). Before, a test was dropped when it was missing from the current run, which also threw away history during a filtered run.
4. Skipped is its own column in the retry ledger JSON and the job summary (bobcat#655). The roll-up's jq schema check reads only Job/RetriesPerformed/FlakyTests, so it is unaffected.
5. CLAUDE.md and .nuke/build.schema.json are updated to match. The CLAUDE.md note that "BOBCAT_SPEC_CONSOLE=1 prints nothing when redirected on alpha.1" now points at bobcat#717, which fixed it in rc.1.

Nothing to change for the other rc.1 breaking changes. Marten never uses CritterStackScenario.Store / CritterStackSpec.Store (renamed to EventStore, bobcat#709). Collapsed-theory folding (bobcat#649) and the matched-durations and parallel-efficiency report lines (bobcat#663/#664) come through RunReport on their own.

Ran locally (no Postgres; other agents share this machine)

• dotnet build src/Marten.slnx -c Release: 0 errors. build/build.csproj: 0 warnings, 0 errors.
• DaemonTests --list-tests on the rc.1 host: 377 tests discovered.
• ./build.sh test-source-generator --framework net9.0 --previous-test-ledger <master run 39031256690's folded-test-ledgers>: 19/19 passed through the rc.1 supervisor, and the run printed Known durations matched 19/19 test(s). The ledger in master's artifact is version 1 and keyed by uid; it loaded and was written back as version 3, keyed by display name.
• A probe against the same artifact: EventSourcingTests.net10.0.json loads 2525 tests and gives 2525 durations keyed by display name, with no shared display names.

The Postgres suites are left to this PR's CI.

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