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Data Flow

From declaration to projection, and the direction data is not allowed to travel.

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Declared Catalog Descriptor team repo Deploy and Infra Intent Policy Source Ingested Descriptor Ingester webhook driven Bundle Builder signs · publishes Acted on Workload Reconciler Infra Reconciler Admission Evaluator Observed Runtime State AKS fleet Resource Graph Azure Repo Activity commits · PRs Projected Software Catalog PostgreSQL Dependency Graph Event and Metric Facts Data Explorer Consumed Component Page DORA and Adoption Control Coverage for audit owner lookup cost · deploys Internal Developer Platform — Data Flow External / third party Security / platform Application we own Data store synchronous batch Nothing flows the other way into the declared column: the platform never writes to a team's repository except as a pull request a human merges. v 1.0 · owner Platform Architecture · date 2026-09

Decisions

  • Nothing flows back into the declared column except as a pull request a human merges. The platform never silently edits a team's repository (ADR-01, ADR-03).
  • Observation is a first-class column: the platform reads the runtime and the resource graph rather than trusting its own record of what it created (ADR-09).
  • Control coverage is a consumer, which is how an off-road component still appears in the audit story (ADR-05).

Assumptions

  • Catalog freshness ≤ 10 minutes p95 from a deploy or ownership change (stated assumption).
  • Descriptor ingestion is webhook-driven with a periodic full reconcile as the backstop.

Risks

  • The projection can lag or be wrong. Divergence is reported in both directions rather than silently resolved, because a catalog that quietly corrects itself teaches nobody anything.
  • Owner lookup on the reconciliation path is the one place the catalog is in a critical path; it is cached and fails to last-known-good.
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Solution Architecture v1.0 · Microsoft Azure · Platform Architecture · 2026-09 · 21 views · 16 architecture decision records10-data-flow