CI/CD Platform  ·  View 09 of 22  ·  Structure

Integration Surface

Three authenticated inbound surfaces, three outbound, and no public build endpoint.

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Inbound Repository webhooks Trigger API Schedule service CI/CD Platform CI/CD Platform one write surface Outbound Checks on the diff Runtime platforms Audit and SIEM signed events dispatch nightly status deploys evidence CI/CD Platform — Integration Surface Interface / broker Security / platform Application we own External / third party synchronous batch Three authenticated inbound surfaces, three outbound. Source control is read-only to the platform; the container registry, identity, package mirrors, chat and cost reporting appear in views 14, 21 and 18. v 1.0 · owner Platform Engineering · date 2026-09

Decisions

  • Every inbound trigger is authenticated: webhooks by signature, the API by workload or human identity, schedules by the platform's own identity. There is no anonymous way to consume a build slot.
  • Nothing is written back to source control except a check status and its summary. The platform is not a committer.
  • The audit and SIEM feed is the compliance interface and is a batch export of write-once evidence, not a query API into live run metadata.

Deliberate omissions

  • Container registry push, identity federation, package mirroring, chat notification and cost reporting are all real surfaces, drawn in views 14, 21 and 18 where they carry more meaning.

Risks

  • The check-status surface is the one place the platform's availability is visible on every pull request. Degrading it degrades the perceived health of source control itself.
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Solution Architecture v1.0 · Amazon Web Services · Platform Architecture · 2026-0909-integration-surface