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feat(eventconsumer): give each delivered event a stable event_id - #41
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Silo is moving plugin event delivery to at-least-once: the API server that produced an event stores it, any API server delivers it, and a failed or timed-out delivery is retried. HandleEventRequest gains event_id, the same on every attempt and for every installation, so a consumer can skip an event it has already handled. runtime-host.md documents the delivery contract. The field is additive: older hosts leave it empty and older plugins ignore it. Refs #40 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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📝 Walkthrough
Merge Risk: 🔵 Low · up to The legacy-host delivery guidance is a bounded documentation uncertainty: consumers could rely on an unverified no-retry guarantee. Confirm the behavior before relying on that guidance. Pre-merge checks |
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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
| Linked Issues check |  |
Issue #40 requires the delivery contract to state that an error or a one-minute timeout requests another attempt. The PR adds event_id = 3 and documents stable IDs, compatibility, retries, and unord… |
Update the docs/runtime-host.md delivery contract to document the required one-minute timeout, or update issue #40 if 10 seconds is the approved contract. Confirm the generated protobuf API also contains HandleEventRequest.event_id; the… |
✅ Passed checks (4 passed)
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Check name Status Explanation Title check The title clearly and concisely identifies the main change: adding a stable event_id to delivered eventconsumer events. Description check The description directly explains the event_id problem, implementation, compatibility behavior, delivery contract, and validation for the changeset. Out of Scope Changes check The reported changes are limited to the HandleEventRequestschema anddocs/runtime-host.md. Both changes directly support issue#40by adding the stable event ID and documenting its delivery contr…Docstring Coverage No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Full details: Linked Issues check
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Explanation
Issue
#40requires the delivery contract to state that an error or a one-minute timeout requests another attempt. The PR addsevent_id = 3and documents stable IDs, compatibility, retries, and unordered delivery. However, the documented timeout is 10 seconds. This does not match the directly linked issue requirement.Resolution
Update the
docs/runtime-host.mddelivery contract to document the required one-minute timeout, or update issue#40if 10 seconds is the approved contract. Confirm the generated protobuf API also containsHandleEventRequest.event_id; the generated.pb.gofile is excluded from this review.
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Actionable comments posted: 2
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Inline comments:
Review comments at @docs/runtime-host.md:
- Around line 214-215: Update the pre-event_id host description in the
EventConsumer documentation to state that event_id is empty and failed
deliveries may be retried; make clear that consumers must not assume only one
delivery per API server.
Review comments at @proto/silo/plugin/v1/event_consumer.proto:
- Around line 18-21: Update the event_id guidance in
proto/silo/plugin/v1/event_consumer.proto, lines 18–21, to say consumers skip
previously handled IDs only when event_id is non-empty. Update the local and
upstream idempotency guidance in docs/runtime-host.md, lines 208–209, to
likewise prohibit using an empty legacy event_id as a deduplication key.
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…s sees each Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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1 participant
Problem
Closes #40
A plugin's
HandleEventreceives onlyevent_nameandpayload, so it cannot tell a repeated delivery from a new event. Silo-Server/silo-server#2314 moves the host to at-least-once delivery: the API server that produced an event stores it in a Postgres outbox, any API server delivers it, and a failed or timed-out delivery is retried. A retry can repeat an event the plugin already handled, for example when the plugin acted but its reply timed out. A plugin that sends notifications needs an ID to skip that repeat.Approach
HandleEventRequestgainsstring event_id = 3. The host sends the same value on every attempt, and every installation that receives the event sees the same value. Hosts that predate the field leave it empty.docs/runtime-host.mdgains "Receiving events", which states the contract plugin authors can rely on: once stored, an event reaches each subscribing installation at least once across the cluster unless every attempt fails; any API server may make the call, and only that process sees it; an error or no answer within 10 seconds asks for another attempt; retries stop after about 20 minutes; events are not ordered; and an event can be lost before Silo stores it.Compatibility and release
Additive. Older plugins ignore the field; older hosts leave it empty and keep their old behavior (one delivery per API server, no retries). No RPC is added, so
EventConsumerServeris unchanged. The host change needs a tagged release that carries this field; Silo-Server/silo-server#2314's pull request pins this commit until then.Validation
go test ./...,go vet ./...: pass.make proto(buf generate): leaves the generated code as committed.gofmt -l .: lists onlypkg/pluginsdk/runtime/scan_source_test.go, which this change does not touch.AI Disclosure
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