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Rebuild missing aggregate snapshots at startup so quiet aggregates stop replaying full history - #61
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…op replaying full history
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Included review availability: This review used your included allowance. 2 included reviews remain after this review. Your included PR review attempts over the past 7 days set your current allowance at 6 reviews per hour. WalkthroughDuring store building, the system rebuilds missing snapshots for retained aggregates with at least Priority: ➖ Normal Merge Risk: ⚪ Minimal · up to Startup rebuilds missing snapshots for eligible aggregates, reducing later full-history replay. Malformed streams are skipped, and no concrete unresolved merge risk is established. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Review comments at @crates/event-sorcery/src/wire.rs:
- Around line 150-164: In the rebuild loop, check `context.aggregate` for
`Lifecycle::Failed` by borrowing it and continue without inserting a snapshot
when it matches. Keep the lifecycle available for serialization on all other
paths.
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Claude Opus 5.5 (Claude 1)
This PR makes StoreBuilder::build() write a snapshot at startup for every retained aggregate that has at least SNAPSHOT_SIZE events and no snapshot. The fix addresses quiet aggregates, such as st0x.liquidity Positions after the version 11 clear, that replayed their full stream on every load. The rebuild uses the same snapshot store as runtime loads, writes with INSERT OR IGNORE, skips Failed lifecycles and compactable entities, and runs before the schema version is recorded.
Overall read: correct and well tested. The rebuilt snapshot matches what cqrs-es 0.5 loads, and later commits keep snapshotting normally, because the snapshot boundaries depend on the sequence. The general reviews found no blocking defect. Three small points remain. A single stream that no longer deserializes now blocks every startup. On a version bump, an interrupted rebuild does not resume, because the snapshots are cleared again. The new guards use matches!, but the repo rules require an exhaustive match. The CodeRabbit thread about failed lifecycles is fixed correctly.
…napshot rebuild, and match lifecycles exhaustively
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
Inline comments:
Review comments at @crates/event-sorcery/src/wire.rs:
- Around line 966-975: Update recorded_schema_versions to match the aggregate
type exactly by extracting and comparing the JSON value at
$.VersionUpdated.name, rather than using a substring LIKE condition. Keep the
SchemaRegistry filter and parameter binding.
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Claude Opus 5.5 (Claude 1)
This PR makes StoreBuilder::build() write a snapshot at startup for every retained aggregate that has at least SNAPSHOT_SIZE events and no snapshot. It runs on every startup and never replaces an existing snapshot (INSERT OR IGNORE). After a schema version bump clears the snapshots, quiet aggregates such as the st0x.liquidity Positions load from a snapshot again instead of replaying 30k events each time.
Overall read: it does what the description says. The rebuilt snapshot uses the state and sequence from the same load_aggregate path that normal loads use, so it lines up with how cqrs-es 0.5 resumes from a snapshot. record_version runs before the rebuild, so an interrupted rebuild resumes on the next start. Lifecycle::Failed and undeserializable streams are skipped with a warning, CompactAfterSnapshot entities are skipped, and other load errors still fail the build. A command snapshot written by another replica during the rebuild is kept, because the rebuild never overwrites. I checked the fixes for all five resolved threads at this commit, and they hold.
No new findings. The one remaining cost is the one the description already states: the first startup after the pin bump replays each large aggregate once, one at a time.
Panel note: opus 5.5 was over its session limit and flash 3.7 was logged out, so their lanes ran on sol 6.1 and composer 2.5. Seven lanes on three models all came back clean.
agryaznov
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Overall looks good to me, just one nit inline
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Claude Opus 5.5 (Claude 1)
This PR makes StoreBuilder::build() write a snapshot at startup for every retained aggregate that has at least SNAPSHOT_SIZE events and no snapshot, so quiet aggregates load from a snapshot again after a schema version bump clears them. The rebuild never overwrites an existing snapshot, runs after record_version so an interrupted rebuild resumes, and skips Lifecycle::Failed and undeserializable streams with a warning.
The only change since my last review (7e83cae to 2451600) is a doc comment on schema_version_bump_rebuilds_cleared_snapshot_at_latest_sequence: the RAI-2766: prefix is removed and the text is rewrapped. No code changed, so there is nothing new to find. No tracker references remain under crates/.
Earlier findings: my last review at 7e83cae had no open findings. The three earlier threads I raised (deserialization errors aborting the build, record_version ordering, exhaustive match guards) were already confirmed fixed at cb4e6aa and the code still holds.
Threads resolved by others:
Lifecycle::Failedsnapshot (CodeRabbit, resolved by CodeRabbit): addressed. The rebuild loop skipsFailedwith a warning, covered byfailed_lifecycle_gets_no_rebuilt_snapshot.- Exact schema-version assertion in tests (CodeRabbit, resolved by CodeRabbit): addressed.
recorded_schema_versionsusesjson_extract(payload, '$.VersionUpdated.name') = ?1. - Tracker ID in a doc comment (@agryaznov, resolved by @ueco-jb): addressed in 2451600, the
RAI-2766:prefix is gone.
Nothing blocks the merge.
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Bumps `event-sorcery` and `sqlite-es` to 0.3.1 through the workspace version and refreshes the workspace and both example lockfiles, so the v0.3.1 tag resolves to crates that report 0.3.1. Same shape as #50. **Live effect:** none until a consumer bumps its pin · **Risk:** low (version and lockfile lines only, no code) · **Ships:** tag `v0.3.1` on the merge commit, then st0x.liquidity bumps its pin to pick up #61 ## Needs your call Nothing. ## Decisions - Only the version lines change. Cargo also pulled an unrelated `hashlink` 0.11.0 -> 0.11.1 into the example lockfiles; that is pinned back so the release carries no dependency change. ## Proof - `cargo check --workspace --all-targets` passes. - Diff: 5 files, +8 -8, all version lines. ## Rollout 1. Merge. 2. Create the `v0.3.1` GitHub release on the merge commit. 3. Bump st0x.liquidity to `tag = "v0.3.1"`. <!-- codesmith:footer --> --- <a href="https://app.blacksmith.sh/ST0x-Technology/codesmith/event-sorcery/pr/62?autoLogin=true&ref=codesmith_pr_footer"><picture><source media="(prefers-color-scheme: dark)" srcset="https://pr-comments-assets.blacksmith.sh/codesmith/view-with-codesmith-dark-v2.svg"><source media="(prefers-color-scheme: light)" srcset="https://pr-comments-assets.blacksmith.sh/codesmith/view-with-codesmith-light-v2.svg"><img alt="View with [code]smith" src="https://pr-comments-assets.blacksmith.sh/codesmith/view-with-codesmith-dark-v2.svg"></picture></a> <a href="https://backend.blacksmith.sh/track/enable-autofix?expires=1793463766&installation_model_id=19370&pr_number=62&ref=codesmith_pr_footer&repository=ST0x-Technology%2Fevent-sorcery&return_to=https%3A%2F%2Fgithub.com%2FST0x-Technology%2Fevent-sorcery%2Fpull%2F62&signature=e7c07ce3a6faa902cf276e6eda941d367300f520d82cea195186e06336b86c3f"><picture><source media="(prefers-color-scheme: dark)" srcset="https://pr-comments-assets.blacksmith.sh/codesmith/autofix-with-codesmith-dark.svg"><source media="(prefers-color-scheme: light)" srcset="https://pr-comments-assets.blacksmith.sh/codesmith/autofix-with-codesmith-light.svg"><img alt="Autofix with [code]smith" src="https://pr-comments-assets.blacksmith.sh/codesmith/autofix-with-codesmith-dark.svg"></picture></a> <sup>Need help on this PR? Tag <code>@codesmith-bot</code> with what you need. Autofix is disabled.</sup> <!-- codesmith:autofix:disabled --> <!-- /codesmith:footer -->
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After this merge,
StoreBuilder::build()writes a snapshot for every retained aggregate that has at leastSNAPSHOT_SIZEevents and no snapshot, before the store accepts commands. A schema version bump clears every snapshot of the type, and commits only write a new one when a command crosses aSNAPSHOT_SIZEboundary, so quiet aggregates replayed their full stream on every load. On 2026-09-30 this stalled the st0x.liquidity offchain inventory poll after Position went to version 11 (SGOV replayed 31,403 events per load). RAI-2766Live effect: none until a consumer bumps its pin. After that, the first startup replays each large aggregate without a snapshot once, then loads start from the snapshot. · Risk: medium (stored data: writes snapshot rows at startup) · Ships: after a manual step (tag a release, then bump the pin in st0x.liquidity)
Decisions
tokio::time::timeout, which drops the load future, so option b would never finish the slowest load and never write its snapshot. (wire.rs)Changed, and never replace an existing snapshot (INSERT OR IGNORE). st0x.liquidity already recorded Position version 11 with the snapshots cleared, so a rebuild gated onChangedwould do nothing on its next release. (wire.rs, sqlite_event_repository.rs)Lifecycle::Failed, with a warning. A snapshot would freeze the failure, so a fix toevolvecould no longer heal the aggregate by replaying. (wire.rs)Risks
build()before the schema version is recorded. The error names the aggregate type and ID and keeps the connection or deserialization class.CompactAfterSnapshotentities are skipped, because the events behind their snapshot may be gone.Proof
schema_version_bump_rebuilds_cleared_snapshot_at_latest_sequenceandunchanged_schema_version_rebuilds_only_missing_snapshotsfailed before this change. The second is the st0x.liquidity case: it rebuilds two missing snapshots in one build, ignores a snapshot of another type with the same ID, and keeps an existing one.failed_rebuild_does_not_record_schema_version,failed_lifecycle_gets_no_rebuilt_snapshot, andinsert_snapshot_if_absent_keeps_existing_snapshotpin the failure paths and the no overwrite rule. Two review passes by independent reviewer agents; the second was clean.wire::testsandsqlite_event_repository::tests). st0x.liquidity was not built against this branch.Rollout
v0.3.1.st0x-event-sorceryto the new tag in st0x.liquidity and release. Signal: startup logsRebuilt missing snapshots aggregate=Position, the snapshots table has one row per Position with at least 10 events, and no slow statement warnings on event loads for quiet symbols.v0.3.0. Rebuilt snapshot rows are valid under both versions.