Lab #2458: datastore config migrate skips setting managedConfig when the datastore is already migrated

Problem

swamp datastore config migrate says it "Sets managedConfig: true in .swamp.yaml if not already". It does not do that when the datastore was already migrated by another repo.

src/cli/commands/datastore_config_migrate.ts returns as soon as result.alreadyMigrated is true (the sentinel exists), before the managedConfigSet block. So a second repo joining a shared datastore keeps running without managedConfig, and nothing says so: the command logs only "Config migration already completed".

Reproduction

Two fresh repos, A and B, on the same S3-compatible bucket and namespace (swamp datastore setup extension @swamp/s3-datastore ... --namespace e2e).
swamp datastore config migrate in A: logs "Migrated ... into datastore config tier", and A's .swamp.yaml gains managedConfig: true.
swamp datastore config migrate in B: logs "Config migration already completed (sentinel exists)", and B's .swamp.yaml has no managedConfig.

Seen while testing swamp-club#2446 against MinIO, on main at edd0e85e plus the 2446 branch (neither change touches this file).

Impact

The documented pod boot sequence (design/enablers/datastores.md, Managed Config Deployment Architecture) copies in a .swamp.yaml that already has managedConfig: true, so it does not hit this. An operator who adds a second instance by running config migrate in a new repo, as the help text suggests, gets a repo that reads definitions from local directories instead of the datastore config tier.

Expected

When the sentinel exists and the marker lacks managedConfig, set it (and log "Set managedConfig: true in .swamp.yaml") before returning. The copy step stays skipped.

Session-start 'swamp model search --json' in the AGENTS.md template is unfulfillable - wire it to a hook or drop it

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Docs: enable-managed-config should say to re-run config migrate when its push fails

Docs: grant file reference shows a stale format and omits resources and subjects

Flaky property test: analyzeExpression hyphenated dot access fails when modelName generates a CEL keyword ("in")

extension quality and push crash with IsADirectory when additionalFiles lists a directory

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seed:collective cannot produce a superseded personal trial or a returned trial, so the UAT cannot cover them

Replayable state fragments: Git-reviewable desired state for resources changed by model methods

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extension push --dry-run: authentication verdict prints 'Signed in as .' when the credential is an API key with no username

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serve HA: worker enrollment on a replica that lacks the enrollment token's definition may create a second definition (unverified)

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extension push: version-drift check reports 'no previously published version found' when the registry call failed

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Workflow load errors print the raw Zod issue dump instead of a readable message

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extension promote accepts a yanked version and reports it promoted

Docs: doctor install reports a stale or failing autoupdate scheduler

extension push output: double-quoted adjacent interpolations, repo-relative paths, and --json emits three JSON documents

auto-resolve: the Installing line prints the extension's entire multi-line description

s3-datastore/serve: readResource without a version returns an older version; the latest marker is rewritten backwards

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Tests: bring the in-memory remote's default semantics up to @swamp/s3-datastore and @swamp/gcs-datastore 2026.10.01.1

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No first-class workflow primitive for spawning a permission-scoped agent session

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Decorative animations outside the Lab still repaint on the main thread

s3/gcs datastore: pullChanged overwrites dirty, unpushed cache files

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Codegen/DigitalOcean: create-only required fields block list/get/delete in generated DigitalOcean models

Codegen/AWS: create-only required fields block list/get/delete in generated AWS models

End a collective's trial when it begins a paid subscription

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s3-datastore: S3Lock.acquire overshoots maxWaitMs by up to a full backoff interval

s3-datastore: a model-scoped pull still lists, walks and indexes the whole namespace

Run the web dashboard locally from the CLI without swamp serve

verify-reviews: adversarial review path guard is a hand-kept list, so new extensions silently skip it

issue-lifecycle skill: prepare-to-ship documents a fast_forward method that does not exist

S3 datastore rejects valid cache paths as traversal on Windows

swamp-club: unknown collective API token returns 422 instead of the documented 404

Partial extension catalog saves delete rows for sources mounted from outside the repo

extensions: cold-path catalog rebuild skips sources whose type is not a string literal, dropping them for one process lifetime

serve: rotate the external token-secrets key

serve: server token GC follow-ups (upgrade backlog holds the sync gate, not-found matching, owner lookup, UX)

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Workflow evaluation rejects another templating system's ${{ }} text, so the #2491 pass-through never reaches workflow steps

@swamp/aws/certificatemanager/certificate: expose ACM's reported attributes (NotAfter, Type, RenewalEligibility, InUseBy) on read

worker prune: remote datastore keeps deleted worker records (no-path markDirty() skips deletions)

Orphaned data record survives a model type migration and is unreachable by data delete/versions/prune