docs: conditional breaking changes based on app deployments product update

packages/web/docs/src/app/product-updates/(posts)/2025-12-10-schema-checks-affected-app-deployments/page.mdx

@@ -0,0 +1,41 @@
+---
+title: Schema Checks Show Affected App Deployments
+description:
+  See which app deployments would be impacted by breaking schema changes before deploying.
+date: 2025-12-10
+authors: [adam]
+---
+
+Schema checks now show which active app deployments would be affected by breaking changes, helping
+you understand the real-world impact before deploying schema updates.
+
+## How It Works
+
+When a schema check detects breaking changes, Hive automatically identifies which active app
+deployments have operations that use the affected schema coordinates. For each affected deployment,
+you'll see:
+
+- The app deployment name and version
+- Which specific operations within that deployment use the affected fields
+
+## Example
+
+If you're removing `Query.users`, and your `[email protected]` deployment has operations that query
+this field, the schema check will show:
+
+- **Breaking change**: Field `users` was removed from object type `Query`
+- **Affected deployment**: `mobile-app` version `2.1.0`
+- **Affected operations**: The specific operation names and hashes that use this field
+
+## Benefits
+
+- **Impact assessment**: Understand which client applications would break before deploying
+- **Team coordination**: Know which teams need to update their apps before proceeding
+- **Risk mitigation**: Make informed decisions about breaking changes
+
+Only **active** app deployments (published and not retired) are analyzed. Pending and retired
+deployments are not included.
+
+---
+
+- [Learn more about App Deployments](/docs/schema-registry/app-deployments#schema-checks-and-affected-app-deployments)

packages/web/docs/src/content/schema-registry/app-deployments.mdx

@@ -258,6 +258,50 @@ change to **retired**.
 
 - [`app:retire` API Reference](https://github.com/graphql-hive/console/tree/main/packages/libraries/cli#hive-appretire)
 
+## Schema Checks and Affected App Deployments
+
+When you run a schema check that detects breaking changes, Hive automatically identifies which
+active app deployments would be affected by those changes. This helps you understand the real-world
+impact of schema changes before deploying them.
+
+### How It Works
+
+During a schema check, Hive analyzes the breaking changes and matches them against the persisted
+documents in your active app deployments. Hive identifies all app deployments that have operations
+using any of the affected schema coordinates (e.g., fields like `Query.hello` that are being
+removed).
+
+For each affected app deployment, you'll see:
+
+- **The deployment** name and version
+- **Which specific operations** within that deployment use the affected schema coordinates
+
+This information is displayed alongside the breaking changes in the schema check results, helping
+you understand the collective impact across all your active app deployments.
+
+### Example
+
+If you have a breaking change that removes the `Query.users` field, and you have an active app
+deployment `[email protected]` with operations that query `Query.users`, the schema check will show:
+
+- The breaking change: "Field 'users' was removed from object type 'Query'"
+- Affected app deployment: `mobile-app` version `2.1.0`
+- Affected operations: The specific operation names and hashes that use this field
+
+### Benefits
+
+- **Impact assessment**: Understand which client applications would break before deploying schema
+  changes
+- **Coordination**: Know which teams need to update their apps before a breaking change can be
+  safely deployed
+- **Risk mitigation**: Make informed decisions about whether to proceed with breaking changes or
+  find alternative approaches
+
+<Callout type="info">
+  Only **active** app deployments (published and not retired) are checked for affected operations.
+  Pending and retired deployments are not included in this analysis.
+</Callout>
+
 ## Persisted Documents on GraphQL Server and Gateway
 
 Persisted documents can be used on your GraphQL server or Gateway to reduce the payload size of your