chore(release): prepare for v0.9.6 (#789 )

## [0.9.6] - 2026-03-29 ### 🐛 Bug Fixes - *(graph)* Stabilize debouncer tests with synctest fake clock - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.257 (#743) - *(deps)* Update golang.org/x/net to v0.51.0 - *(deps)* Update module go.opentelemetry.io/contrib/bridges/otelslog to v0.16.0 (#745) - *(deps)* Update opentelemetry-go monorepo (#744) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.260 (#750) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.261 (#751) - *(deps)* Update opentelemetry-go monorepo (#755) - *(deps)* Update module go.opentelemetry.io/contrib/bridges/otelslog to v0.17.0 (#756) - *(deps)* Update module golang.org/x/sync to v0.20.0 (#760) - *(deps)* Update module github.com/99designs/gqlgen to v0.17.88 (#762) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.262 (#765) - *(deps)* Update module golang.org/x/crypto to v0.49.0 (#767) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.263 (#771) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.264 (#773) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.265 (#776) - *(deps)* Update module gitlab.com/unboundsoftware/eventsourced/pg to v1.18.5 (#778) - *(deps)* Update module github.com/99designs/gqlgen to v0.17.89 (#782) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.266 (#784) - *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.267 (#786) - Cap Node.js heap to prevent OOM during wgc composition (#788) ### ⚙️ Miscellaneous Tasks - *(deps)* Update golang docker tag to v1.26.1 (#752) - *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.1 - *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.2 (#758) - *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.3 (#763) - *(deps)* Update pre-commit hook gitleaks/gitleaks to v8.30.1 (#769) - *(deps)* Update golang:1.26.1 docker digest to 984bf90 (#774) - *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.4 (#780) - *(deps)* Update node.js to v24.14.1 (#783)  --- **Note:** Please use **Squash Merge** when merging this PR. Reviewed-on: #789 Co-authored-by: Unbound Releaser <releaser@unbound.se> Co-committed-by: Unbound Releaser <releaser@unbound.se>
fix: cap Node.js heap to prevent OOM during wgc composition (#788 )
2026-03-29 09:54:53 +00:00 · 2026-03-29 09:31:53 +00:00 · 2026-03-26 14:08:20 +00:00 · 2026-03-26 12:24:33 +00:00 · 2026-03-26 11:23:35 +00:00 · 2026-03-24 18:44:05 +00:00
16 changed files with 742 additions and 785 deletions
@@ -50,16 +50,19 @@ jobs:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '24'
      - uses: actions/setup-go@v6
        with:
          go-version: 'stable'
      - name: Check goreleaser config
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@v7
        with:
          version: '~> v2'
          args: check
      - name: Test release build
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@v7
        with:
          version: '~> v2'
          args: release --snapshot --clean
@@ -15,13 +15,16 @@ jobs:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
+      - uses: actions/setup-node@v6
+        with:
+          node-version: '24'
      - uses: actions/setup-go@v6
        with:
          go-version: 'stable'
      - name: Install goreleaser
-        uses: goreleaser/goreleaser-action@v6
+        uses: goreleaser/goreleaser-action@v7
        with:
-          version: '~> v2'
+          version: 'v2.13.3'
          install-only: true
      - name: Release
        run: |
@@ -30,11 +30,11 @@ repos:
  - id: go-test
  - id: gofumpt
 - repo: https://github.com/golangci/golangci-lint
-  rev: v2.9.0
+  rev: v2.11.4
  hooks:
  - id: golangci-lint-full
 - repo: https://github.com/gitleaks/gitleaks
-  rev: v8.30.0
+  rev: v8.30.1
  hooks:
  - id: gitleaks
 exclude: '^ctl/generated.go|graph/generated/.*$|^graph/model/models_gen.go|^tools/.*$$'
@@ -1,3 +1,3 @@
 {
-  "version": "v0.9.2"
+  "version": "v0.9.6"
 }
@@ -2,6 +2,85 @@

 All notable changes to this project will be documented in this file.

+## [0.9.6] - 2026-03-29
+
+### 🐛 Bug Fixes
+
+- *(graph)* Stabilize debouncer tests with synctest fake clock
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.257 (#743)
+- *(deps)* Update golang.org/x/net to v0.51.0
+- *(deps)* Update module go.opentelemetry.io/contrib/bridges/otelslog to v0.16.0 (#745)
+- *(deps)* Update opentelemetry-go monorepo (#744)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.260 (#750)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.261 (#751)
+- *(deps)* Update opentelemetry-go monorepo (#755)
+- *(deps)* Update module go.opentelemetry.io/contrib/bridges/otelslog to v0.17.0 (#756)
+- *(deps)* Update module golang.org/x/sync to v0.20.0 (#760)
+- *(deps)* Update module github.com/99designs/gqlgen to v0.17.88 (#762)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.262 (#765)
+- *(deps)* Update module golang.org/x/crypto to v0.49.0 (#767)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.263 (#771)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.264 (#773)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.265 (#776)
+- *(deps)* Update module gitlab.com/unboundsoftware/eventsourced/pg to v1.18.5 (#778)
+- *(deps)* Update module github.com/99designs/gqlgen to v0.17.89 (#782)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.266 (#784)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.267 (#786)
+- Cap Node.js heap to prevent OOM during wgc composition (#788)
+
+### ⚙️ Miscellaneous Tasks
+
+- *(deps)* Update golang docker tag to v1.26.1 (#752)
+- *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.1
+- *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.2 (#758)
+- *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.3 (#763)
+- *(deps)* Update pre-commit hook gitleaks/gitleaks to v8.30.1 (#769)
+- *(deps)* Update golang:1.26.1 docker digest to 984bf90 (#774)
+- *(deps)* Update pre-commit hook golangci/golangci-lint to v2.11.4 (#780)
+- *(deps)* Update node.js to v24.14.1 (#783)
+
+## [0.9.5] - 2026-02-25
+
+### 🐛 Bug Fixes
+
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.256
+
+### ⚙️ Miscellaneous Tasks
+
+- *(deps)* Update golang:1.26.0 docker digest to 9835fb4 (#736)
+- *(deps)* Update node.js to v24.14.0 (#735)
+- *(deps)* Update node.js to 7fddd9d (#739)
+
+## [0.9.4] - 2026-02-23
+
+### 🐛 Bug Fixes
+
+- *(ci)* Pin goreleaser to v2.13.3 for Gitea SDK compatibility
+
+## [0.9.3] - 2026-02-23
+
+### 🐛 Bug Fixes
+
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.249 (#702)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.250 (#704)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.251
+- *(deps)* Update module gitlab.com/unboundsoftware/eventsourced/pg to v1.18.3
+- *(deps)* Update module github.com/vektah/gqlparser/v2 to v2.5.32
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.252 (#714)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.253 (#716)
+- *(deps)* Update module github.com/99designs/gqlgen to v0.17.87
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.254 (#718)
+- *(deps)* Update module github.com/wundergraph/graphql-go-tools/v2 to v2.0.0-rc.255
+- *(deps)* Update module github.com/pressly/goose/v3 to v3.27.0
+- *(deps)* Update module gitlab.com/unboundsoftware/eventsourced/pg to v1.18.4 (#727)
+- Prevent OOM on rapid schema publishing
+
+### ⚙️ Miscellaneous Tasks
+
+- *(deps)* Update pre-commit hook golangci/golangci-lint to v2.10.1 (#706)
+- *(deps)* Update goreleaser/goreleaser-action action to v7
+- *(deps)* Update actions/setup-node action to v6
+
 ## [0.9.2] - 2026-02-13

 ### 🐛 Bug Fixes
@@ -1,4 +1,4 @@
-FROM amd64/golang:1.26.0@sha256:e7479dbd4918090d893b97245fd8c0bcf767677f8ede2e60e7fb2c2f38c94215 as modules
+FROM amd64/golang:1.26.1@sha256:984bf90a420602a708a0e5b08d5660e2902daf7d26f0be3c5db5d07ced6dcce3 as modules
 WORKDIR /build
 ADD go.* /build
 RUN go mod download
@@ -24,12 +24,15 @@ RUN GOOS=linux GOARCH=amd64 go build \
 FROM scratch as export
 COPY --from=build /build/coverage.txt /

-FROM node:24.13.1-alpine@sha256:4f696fbf39f383c1e486030ba6b289a5d9af541642fc78ab197e584a113b9c03
+FROM node:24.14.1-alpine@sha256:01743339035a5c3c11a373cd7c83aeab6ed1457b55da6a69e014a95ac4e4700b
 ENV TZ Europe/Stockholm

 # Install wgc CLI globally for Cosmo Router composition
 RUN npm install -g wgc@latest

+# Cap Node.js heap for runtime wgc invocations to prevent OOM
+ENV NODE_OPTIONS="--max-old-space-size=64"
+
 # Copy timezone data and certificates
 COPY --from=build /usr/share/zoneinfo /usr/share/zoneinfo
 COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
@@ -201,11 +201,13 @@ func start(closeEvents chan error, logger *slog.Logger, connectToAmqpFunc func(u
 		defer rootCancel()

 		resolver := &graph.Resolver{
-			EventStore: eventStore,
-			Publisher:  eventPublisher,
-			Logger:     logger,
-			Cache:      serviceCache,
-			PubSub:     graph.NewPubSub(),
+			EventStore:     eventStore,
+			Publisher:      eventPublisher,
+			Logger:         logger,
+			Cache:          serviceCache,
+			PubSub:         graph.NewPubSub(),
+			CosmoGenerator: graph.NewCosmoGenerator(&graph.DefaultCommandExecutor{}, 60*time.Second),
+			Debouncer:      graph.NewDebouncer(500 * time.Millisecond),
 		}

 		config := generated.Config{
@@ -1,9 +1,9 @@
 module gitea.unbound.se/unboundsoftware/schemas

-go 1.25
+go 1.25.0

 require (
-	github.com/99designs/gqlgen v0.17.86
+	github.com/99designs/gqlgen v0.17.89
 	github.com/DATA-DOG/go-sqlmock v1.5.2
 	github.com/Khan/genqlient v0.8.1
 	github.com/alecthomas/kong v1.14.0
@@ -11,26 +11,27 @@ require (
 	github.com/auth0/go-jwt-middleware/v3 v3.0.0
 	github.com/google/uuid v1.6.0
 	github.com/jmoiron/sqlx v1.4.0
-	github.com/pressly/goose/v3 v3.26.0
+	github.com/pressly/goose/v3 v3.27.0
 	github.com/rs/cors v1.11.1
 	github.com/sparetimecoders/goamqp v0.3.3
 	github.com/stretchr/testify v1.11.1
-	github.com/vektah/gqlparser/v2 v2.5.31
-	github.com/wundergraph/graphql-go-tools/v2 v2.0.0-rc.248
+	github.com/vektah/gqlparser/v2 v2.5.32
+	github.com/wundergraph/graphql-go-tools/v2 v2.0.0-rc.267
 	gitlab.com/unboundsoftware/eventsourced/amqp v1.9.1
 	gitlab.com/unboundsoftware/eventsourced/eventsourced v1.19.4
-	gitlab.com/unboundsoftware/eventsourced/pg v1.18.2
-	go.opentelemetry.io/contrib/bridges/otelslog v0.15.0
-	go.opentelemetry.io/otel v1.40.0
-	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.40.0
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.40.0
-	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.16.0
-	go.opentelemetry.io/otel/log v0.16.0
-	go.opentelemetry.io/otel/sdk v1.40.0
-	go.opentelemetry.io/otel/sdk/log v0.16.0
-	go.opentelemetry.io/otel/sdk/metric v1.40.0
-	go.opentelemetry.io/otel/trace v1.40.0
-	golang.org/x/crypto v0.48.0
+	gitlab.com/unboundsoftware/eventsourced/pg v1.18.5
+	go.opentelemetry.io/contrib/bridges/otelslog v0.17.0
+	go.opentelemetry.io/otel v1.42.0
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.42.0
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.42.0
+	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.18.0
+	go.opentelemetry.io/otel/log v0.18.0
+	go.opentelemetry.io/otel/sdk v1.42.0
+	go.opentelemetry.io/otel/sdk/log v0.18.0
+	go.opentelemetry.io/otel/sdk/metric v1.42.0
+	go.opentelemetry.io/otel/trace v1.42.0
+	golang.org/x/crypto v0.49.0
+	golang.org/x/sync v0.20.0
 	gopkg.in/yaml.v3 v3.0.1
 )

@@ -43,11 +44,11 @@ require (
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.0 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/goccy/go-yaml v1.19.2 // indirect
 	github.com/gorilla/websocket v1.5.1 // indirect
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.7 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect
 	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
 	github.com/lestrrat-go/blackmagic v1.0.4 // indirect
 	github.com/lestrrat-go/dsig v1.0.0 // indirect
@@ -56,36 +57,35 @@ require (
 	github.com/lestrrat-go/httprc/v3 v3.0.3 // indirect
 	github.com/lestrrat-go/jwx/v3 v3.0.12 // indirect
 	github.com/lestrrat-go/option/v2 v2.0.0 // indirect
-	github.com/lib/pq v1.11.1 // indirect
+	github.com/lib/pq v1.12.0 // indirect
 	github.com/mfridman/interpolate v0.0.2 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rabbitmq/amqp091-go v1.10.0 // indirect
 	github.com/segmentio/asm v1.2.1 // indirect
 	github.com/sethvargo/go-retry v0.3.0 // indirect
-	github.com/sosodev/duration v1.3.1 // indirect
+	github.com/sosodev/duration v1.4.0 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/tidwall/gjson v1.17.0 // indirect
 	github.com/tidwall/match v1.1.1 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect
 	github.com/tidwall/sjson v1.2.5 // indirect
-	github.com/urfave/cli/v3 v3.6.1 // indirect
+	github.com/urfave/cli/v3 v3.7.0 // indirect
 	github.com/valyala/fastjson v1.6.7 // indirect
-	github.com/wundergraph/astjson v1.0.0 // indirect
+	github.com/wundergraph/astjson v1.1.0 // indirect
 	github.com/wundergraph/go-arena v1.1.0 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.40.0 // indirect
-	go.opentelemetry.io/otel/metric v1.40.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.42.0 // indirect
+	go.opentelemetry.io/otel/metric v1.42.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.9.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/mod v0.32.0 // indirect
-	golang.org/x/net v0.49.0 // indirect
-	golang.org/x/sync v0.19.0 // indirect
-	golang.org/x/sys v0.41.0 // indirect
-	golang.org/x/text v0.34.0 // indirect
-	golang.org/x/tools v0.41.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20260128011058-8636f8732409 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409 // indirect
-	google.golang.org/grpc v1.78.0 // indirect
+	golang.org/x/mod v0.33.0 // indirect
+	golang.org/x/net v0.51.0 // indirect
+	golang.org/x/sys v0.42.0 // indirect
+	golang.org/x/text v0.35.0 // indirect
+	golang.org/x/tools v0.42.0 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260209200024-4cfbd4190f57 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d // indirect
+	google.golang.org/grpc v1.79.2 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 )
@@ -1,7 +1,8 @@
-filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
-github.com/99designs/gqlgen v0.17.86 h1:C8N3UTa5heXX6twl+b0AJyGkTwYL6dNmFrgZNLRcU6w=
-github.com/99designs/gqlgen v0.17.86/go.mod h1:KTrPl+vHA1IUzNlh4EYkl7+tcErL3MgKnhHrBcV74Fw=
+filippo.io/edwards25519 v1.2.0 h1:crnVqOiS4jqYleHd9vaKZ+HKtHfllngJIiOpNpoJsjo=
+filippo.io/edwards25519 v1.2.0/go.mod h1:xzAOLCNug/yB62zG1bQ8uziwrIqIuxhctzJT18Q77mc=
+github.com/99designs/gqlgen v0.17.89 h1:KzEcxPiMgQoMw3m/E85atUEHyZyt0PbAflMia5Kw8z8=
+github.com/99designs/gqlgen v0.17.89/go.mod h1:GFqruTVGB7ZTdrf1uzOagpXbY7DrEt1pIxnTdhIbWvQ=
 github.com/DATA-DOG/go-sqlmock v1.5.2 h1:OcvFkGmslmlZibjAjaHm3L//6LiuBgolP7OputlJIzU=
 github.com/DATA-DOG/go-sqlmock v1.5.2/go.mod h1:88MAG/4G7SMwSE3CeA0ZKzrT5CiOU3OJ+JlNzwDqpNU=
 github.com/Khan/genqlient v0.8.1 h1:wtOCc8N9rNynRLXN3k3CnfzheCUNKBcvXmVv5zt6WCs=
@@ -57,8 +58,8 @@ github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre
 github.com/go-sql-driver/mysql v1.8.1/go.mod h1:wEBSXgmK//2ZFJyE+qWnIsVGmvmEKlqwuVSjsCm7DZg=
 github.com/go-sql-driver/mysql v1.9.3 h1:U/N249h2WzJ3Ukj8SowVFjdtZKfu9vlLZxjPXV1aweo=
 github.com/go-sql-driver/mysql v1.9.3/go.mod h1:qn46aNg1333BRMNU69Lq93t8du/dwxI64Gl8i5p1WMU=
-github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs=
-github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
+github.com/go-viper/mapstructure/v2 v2.5.0 h1:vM5IJoUAy3d7zRSVtIwQgBj7BiWtMPfmPEgAXnvj1Ro=
+github.com/go-viper/mapstructure/v2 v2.5.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
 github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
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@@ -74,8 +75,8 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
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@@ -111,8 +112,8 @@ github.com/lestrrat-go/jwx/v3 v3.0.12/go.mod h1:HiUSaNmMLXgZ08OmGBaPVvoZQgJVOQph
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@@ -124,8 +125,8 @@ github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxU
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+go.opentelemetry.io/otel/metric v1.42.0 h1:2jXG+3oZLNXEPfNmnpxKDeZsFI5o4J+nz6xUlaFdF/4=
+go.opentelemetry.io/otel/metric v1.42.0/go.mod h1:RlUN/7vTU7Ao/diDkEpQpnz3/92J9ko05BIwxYa2SSI=
+go.opentelemetry.io/otel/sdk v1.42.0 h1:LyC8+jqk6UJwdrI/8VydAq/hvkFKNHZVIWuslJXYsDo=
+go.opentelemetry.io/otel/sdk v1.42.0/go.mod h1:rGHCAxd9DAph0joO4W6OPwxjNTYWghRWmkHuGbayMts=
+go.opentelemetry.io/otel/sdk/log v0.18.0 h1:n8OyZr7t7otkeTnPTbDNom6rW16TBYGtvyy2Gk6buQw=
+go.opentelemetry.io/otel/sdk/log v0.18.0/go.mod h1:C0+wxkTwKpOCZLrlJ3pewPiiQwpzycPI/u6W0Z9fuYk=
+go.opentelemetry.io/otel/sdk/log/logtest v0.18.0 h1:l3mYuPsuBx6UKE47BVcPrZoZ0q/KER57vbj2qkgDLXA=
+go.opentelemetry.io/otel/sdk/log/logtest v0.18.0/go.mod h1:7cHtiVJpZebB3wybTa4NG+FUo5NPe3PROz1FqB0+qdw=
+go.opentelemetry.io/otel/sdk/metric v1.42.0 h1:D/1QR46Clz6ajyZ3G8SgNlTJKBdGp84q9RKCAZ3YGuA=
+go.opentelemetry.io/otel/sdk/metric v1.42.0/go.mod h1:Ua6AAlDKdZ7tdvaQKfSmnFTdHx37+J4ba8MwVCYM5hc=
+go.opentelemetry.io/otel/trace v1.42.0 h1:OUCgIPt+mzOnaUTpOQcBiM/PLQ/Op7oq6g4LenLmOYY=
+go.opentelemetry.io/otel/trace v1.42.0/go.mod h1:f3K9S+IFqnumBkKhRJMeaZeNk9epyhnCmQh/EysQCdc=
 go.opentelemetry.io/proto/otlp v1.9.0 h1:l706jCMITVouPOqEnii2fIAuO3IVGBRPV5ICjceRb/A=
 go.opentelemetry.io/proto/otlp v1.9.0/go.mod h1:xE+Cx5E/eEHw+ISFkwPLwCZefwVjY+pqKg1qcK03+/4=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
@@ -241,41 +242,41 @@ go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
 go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.48.0 h1:/VRzVqiRSggnhY7gNRxPauEQ5Drw9haKdM0jqfcCFts=
-golang.org/x/crypto v0.48.0/go.mod h1:r0kV5h3qnFPlQnBSrULhlsRfryS2pmewsg+XfMgkVos=
-golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b h1:M2rDM6z3Fhozi9O7NWsxAkg/yqS/lQJ6PmkyIV3YP+o=
-golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b/go.mod h1:3//PLf8L/X+8b4vuAfHzxeRUl04Adcb341+IGKfnqS8=
-golang.org/x/mod v0.32.0 h1:9F4d3PHLljb6x//jOyokMv3eX+YDeepZSEo3mFJy93c=
-golang.org/x/mod v0.32.0/go.mod h1:SgipZ/3h2Ci89DlEtEXWUk/HteuRin+HHhN+WbNhguU=
+golang.org/x/crypto v0.49.0 h1:+Ng2ULVvLHnJ/ZFEq4KdcDd/cfjrrjjNSXNzxg0Y4U4=
+golang.org/x/crypto v0.49.0/go.mod h1:ErX4dUh2UM+CFYiXZRTcMpEcN8b/1gxEuv3nODoYtCA=
+golang.org/x/exp v0.0.0-20260218203240-3dfff04db8fa h1:Zt3DZoOFFYkKhDT3v7Lm9FDMEV06GpzjG2jrqW+QTE0=
+golang.org/x/exp v0.0.0-20260218203240-3dfff04db8fa/go.mod h1:K79w1Vqn7PoiZn+TkNpx3BUWUQksGO3JcVX6qIjytmA=
+golang.org/x/mod v0.33.0 h1:tHFzIWbBifEmbwtGz65eaWyGiGZatSrT9prnU8DbVL8=
+golang.org/x/mod v0.33.0/go.mod h1:swjeQEj+6r7fODbD2cqrnje9PnziFuw4bmLbBZFrQ5w=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.49.0 h1:eeHFmOGUTtaaPSGNmjBKpbng9MulQsJURQUAfUwY++o=
-golang.org/x/net v0.49.0/go.mod h1:/ysNB2EvaqvesRkuLAyjI1ycPZlQHM3q01F02UY/MV8=
+golang.org/x/net v0.51.0 h1:94R/GTO7mt3/4wIKpcR5gkGmRLOuE/2hNGeWq/GBIFo=
+golang.org/x/net v0.51.0/go.mod h1:aamm+2QF5ogm02fjy5Bb7CQ0WMt1/WVM7FtyaTLlA9Y=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
-golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
-golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
+golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
-golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
-golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
+golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
+golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/tools v0.41.0 h1:a9b8iMweWG+S0OBnlU36rzLp20z1Rp10w+IY2czHTQc=
-golang.org/x/tools v0.41.0/go.mod h1:XSY6eDqxVNiYgezAVqqCeihT4j1U2CCsqvH3WhQpnlg=
+golang.org/x/tools v0.42.0 h1:uNgphsn75Tdz5Ji2q36v/nsFSfR/9BRFvqhGBaJGd5k=
+golang.org/x/tools v0.42.0/go.mod h1:Ma6lCIwGZvHK6XtgbswSoWroEkhugApmsXyrUmBhfr0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/genproto/googleapis/api v0.0.0-20260128011058-8636f8732409 h1:merA0rdPeUV3YIIfHHcH4qBkiQAc1nfCKSI7lB4cV2M=
-google.golang.org/genproto/googleapis/api v0.0.0-20260128011058-8636f8732409/go.mod h1:fl8J1IvUjCilwZzQowmw2b7HQB2eAuYBabMXzWurF+I=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409 h1:H86B94AW+VfJWDqFeEbBPhEtHzJwJfTbgE2lZa54ZAQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260128011058-8636f8732409/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.78.0 h1:K1XZG/yGDJnzMdd/uZHAkVqJE+xIDOcmdSFZkBUicNc=
-google.golang.org/grpc v1.78.0/go.mod h1:I47qjTo4OKbMkjA/aOOwxDIiPSBofUtQUI5EfpWvW7U=
+google.golang.org/genproto/googleapis/api v0.0.0-20260209200024-4cfbd4190f57 h1:JLQynH/LBHfCTSbDWl+py8C+Rg/k1OVH3xfcaiANuF0=
+google.golang.org/genproto/googleapis/api v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:kSJwQxqmFXeo79zOmbrALdflXQeAYcUbgS7PbpMknCY=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d h1:t/LOSXPJ9R0B6fnZNyALBRfZBH0Uy0gT+uR+SJ6syqQ=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260217215200-42d3e9bedb6d/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
+google.golang.org/grpc v1.79.2 h1:fRMD94s2tITpyJGtBBn7MkMseNpOZU8ZxgC3MMBaXRU=
+google.golang.org/grpc v1.79.2/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
 google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -290,11 +291,11 @@ gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C
 gopkg.in/yaml.v3 v3.0.0-20200605160147-a5ece683394c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-modernc.org/libc v1.66.3 h1:cfCbjTUcdsKyyZZfEUKfoHcP3S0Wkvz3jgSzByEWVCQ=
-modernc.org/libc v1.66.3/go.mod h1:XD9zO8kt59cANKvHPXpx7yS2ELPheAey0vjIuZOhOU8=
+modernc.org/libc v1.68.0 h1:PJ5ikFOV5pwpW+VqCK1hKJuEWsonkIJhhIXyuF/91pQ=
+modernc.org/libc v1.68.0/go.mod h1:NnKCYeoYgsEqnY3PgvNgAeaJnso968ygU8Z0DxjoEc0=
 modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
 modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
 modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
 modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
-modernc.org/sqlite v1.38.2 h1:Aclu7+tgjgcQVShZqim41Bbw9Cho0y/7WzYptXqkEek=
-modernc.org/sqlite v1.38.2/go.mod h1:cPTJYSlgg3Sfg046yBShXENNtPrWrDX8bsbAQBzgQ5E=
+modernc.org/sqlite v1.46.1 h1:eFJ2ShBLIEnUWlLy12raN0Z1plqmFX9Qe3rjQTKt6sU=
+modernc.org/sqlite v1.46.1/go.mod h1:CzbrU2lSB1DKUusvwGz7rqEKIq+NUd8GWuBBZDs9/nA=
@@ -1,11 +1,14 @@
 package graph

 import (
+	"context"
 	"fmt"
 	"os"
 	"os/exec"
 	"path/filepath"
+	"time"

+	"golang.org/x/sync/semaphore"
 	"gopkg.in/yaml.v3"

 	"gitea.unbound.se/unboundsoftware/schemas/graph/model"
@@ -123,3 +126,36 @@ func GenerateCosmoRouterConfigWithExecutor(subGraphs []*model.SubGraph, executor

 	return string(configJSON), nil
 }
+
+// CosmoGenerator wraps config generation with a concurrency limit and timeout
+// to prevent unbounded wgc process spawning under rapid schema updates.
+type CosmoGenerator struct {
+	sem      *semaphore.Weighted
+	executor CommandExecutor
+	timeout  time.Duration
+}
+
+// NewCosmoGenerator creates a CosmoGenerator that allows at most one concurrent
+// wgc process and applies the given timeout to each generation attempt.
+func NewCosmoGenerator(executor CommandExecutor, timeout time.Duration) *CosmoGenerator {
+	return &CosmoGenerator{
+		sem:      semaphore.NewWeighted(1),
+		executor: executor,
+		timeout:  timeout,
+	}
+}
+
+// Generate produces a Cosmo Router config, blocking if another generation is
+// already in progress. The provided context (plus the configured timeout)
+// controls cancellation.
+func (g *CosmoGenerator) Generate(ctx context.Context, subGraphs []*model.SubGraph) (string, error) {
+	ctx, cancel := context.WithTimeout(ctx, g.timeout)
+	defer cancel()
+
+	if err := g.sem.Acquire(ctx, 1); err != nil {
+		return "", fmt.Errorf("acquire cosmo generator: %w", err)
+	}
+	defer g.sem.Release(1)
+
+	return GenerateCosmoRouterConfigWithExecutor(subGraphs, g.executor)
+}
@@ -1,11 +1,15 @@
 package graph

 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"os"
 	"strings"
+	"sync"
+	"sync/atomic"
 	"testing"
+	"time"

 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -459,6 +463,114 @@ func TestGenerateCosmoRouterConfig_MockError(t *testing.T) {
 	assert.Equal(t, 1, mockExecutor.CallCount, "Should have attempted to call executor")
 }

+// SlowMockExecutor simulates a slow wgc command for concurrency testing.
+type SlowMockExecutor struct {
+	MockCommandExecutor
+	delay      time.Duration
+	mu         sync.Mutex
+	concurrent atomic.Int32
+	maxSeen    atomic.Int32
+}
+
+func (m *SlowMockExecutor) Execute(name string, args ...string) ([]byte, error) {
+	cur := m.concurrent.Add(1)
+	// Track the maximum concurrent executions observed.
+	for {
+		old := m.maxSeen.Load()
+		if cur <= old || m.maxSeen.CompareAndSwap(old, cur) {
+			break
+		}
+	}
+	defer m.concurrent.Add(-1)
+
+	time.Sleep(m.delay)
+
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	return m.MockCommandExecutor.Execute(name, args...)
+}
+
+func TestCosmoGenerator_ConcurrencyLimit(t *testing.T) {
+	executor := &SlowMockExecutor{delay: 100 * time.Millisecond}
+	gen := NewCosmoGenerator(executor, 5*time.Second)
+
+	subGraphs := []*model.SubGraph{
+		{
+			Service: "svc",
+			URL:     stringPtr("http://localhost:4001/query"),
+			Sdl:     "type Query { hello: String }",
+		},
+	}
+
+	var wg sync.WaitGroup
+	for range 5 {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			_, _ = gen.Generate(context.Background(), subGraphs)
+		}()
+	}
+	wg.Wait()
+
+	assert.Equal(t, int32(1), executor.maxSeen.Load(),
+		"at most 1 wgc process should run concurrently")
+}
+
+func TestCosmoGenerator_Timeout(t *testing.T) {
+	// Executor that takes longer than the timeout.
+	executor := &SlowMockExecutor{delay: 500 * time.Millisecond}
+	gen := NewCosmoGenerator(executor, 50*time.Millisecond)
+
+	subGraphs := []*model.SubGraph{
+		{
+			Service: "svc",
+			URL:     stringPtr("http://localhost:4001/query"),
+			Sdl:     "type Query { hello: String }",
+		},
+	}
+
+	// First call: occupies the semaphore for 500ms.
+	go func() {
+		_, _ = gen.Generate(context.Background(), subGraphs)
+	}()
+
+	// Give the first goroutine time to acquire the semaphore.
+	time.Sleep(20 * time.Millisecond)
+
+	// Second call: should timeout waiting for the semaphore.
+	_, err := gen.Generate(context.Background(), subGraphs)
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "acquire cosmo generator")
+}
+
+func TestCosmoGenerator_ContextCancellation(t *testing.T) {
+	executor := &SlowMockExecutor{delay: 500 * time.Millisecond}
+	gen := NewCosmoGenerator(executor, 5*time.Second)
+
+	subGraphs := []*model.SubGraph{
+		{
+			Service: "svc",
+			URL:     stringPtr("http://localhost:4001/query"),
+			Sdl:     "type Query { hello: String }",
+		},
+	}
+
+	// First call: occupies the semaphore.
+	go func() {
+		_, _ = gen.Generate(context.Background(), subGraphs)
+	}()
+
+	time.Sleep(20 * time.Millisecond)
+
+	// Second call with an already-cancelled context.
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	_, err := gen.Generate(ctx, subGraphs)
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "acquire cosmo generator")
+}
+
 // Helper function for tests
 func stringPtr(s string) *string {
 	return &s
@@ -0,0 +1,42 @@
+package graph
+
+import (
+	"sync"
+	"time"
+)
+
+// Debouncer coalesces rapid calls with the same key, executing only the last
+// one after a configurable delay. This prevents redundant work when multiple
+// updates arrive in quick succession (e.g., rapid schema publishing).
+type Debouncer struct {
+	mu     sync.Mutex
+	delay  time.Duration
+	timers map[string]*time.Timer
+}
+
+// NewDebouncer creates a Debouncer with the given delay window.
+func NewDebouncer(delay time.Duration) *Debouncer {
+	return &Debouncer{
+		delay:  delay,
+		timers: make(map[string]*time.Timer),
+	}
+}
+
+// Debounce resets the timer for key. When the timer fires (after delay with no
+// new calls for the same key), fn is executed in a new goroutine.
+func (d *Debouncer) Debounce(key string, fn func()) {
+	d.mu.Lock()
+	defer d.mu.Unlock()
+
+	if t, ok := d.timers[key]; ok {
+		t.Stop()
+	}
+
+	d.timers[key] = time.AfterFunc(d.delay, func() {
+		d.mu.Lock()
+		delete(d.timers, key)
+		d.mu.Unlock()
+
+		fn()
+	})
+}
@@ -0,0 +1,69 @@
+package graph
+
+import (
+	"sync/atomic"
+	"testing"
+	"testing/synctest"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDebouncer_Coalesces(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		d := NewDebouncer(50 * time.Millisecond)
+		var calls atomic.Int32
+
+		// Fire 10 rapid calls for the same key — only the last should execute.
+		for range 10 {
+			d.Debounce("key1", func() {
+				calls.Add(1)
+			})
+		}
+
+		// Advance fake clock past the debounce delay and let goroutines settle.
+		time.Sleep(50 * time.Millisecond)
+		synctest.Wait()
+
+		assert.Equal(t, int32(1), calls.Load(), "rapid calls should coalesce into a single execution")
+	})
+}
+
+func TestDebouncer_DifferentKeys(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		d := NewDebouncer(50 * time.Millisecond)
+		var calls atomic.Int32
+
+		d.Debounce("key-a", func() { calls.Add(1) })
+		d.Debounce("key-b", func() { calls.Add(1) })
+		d.Debounce("key-c", func() { calls.Add(1) })
+
+		time.Sleep(50 * time.Millisecond)
+		synctest.Wait()
+
+		assert.Equal(t, int32(3), calls.Load(), "different keys should fire independently")
+	})
+}
+
+func TestDebouncer_TimerReset(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		d := NewDebouncer(100 * time.Millisecond)
+		var value atomic.Int32
+
+		// First call sets value to 1.
+		d.Debounce("key", func() { value.Store(1) })
+
+		// Advance 60ms (less than the 100ms delay) — first timer hasn't fired.
+		time.Sleep(60 * time.Millisecond)
+
+		// Replace with value 2 — resets the timer to fire at 60+100 = 160ms.
+		d.Debounce("key", func() { value.Store(2) })
+
+		// Advance another 100ms (total 160ms) to fire the reset timer.
+		time.Sleep(100 * time.Millisecond)
+		synctest.Wait()
+
+		require.Equal(t, int32(2), value.Load(), "later call should replace the earlier one")
+	})
+}
@@ -24,11 +24,13 @@ type Publisher interface {
 }

 type Resolver struct {
-	EventStore eventsourced.EventStore
-	Publisher  Publisher
-	Logger     *slog.Logger
-	Cache      *cache.Cache
-	PubSub     *PubSub
+	EventStore     eventsourced.EventStore
+	Publisher      Publisher
+	Logger         *slog.Logger
+	Cache          *cache.Cache
+	PubSub         *PubSub
+	CosmoGenerator *CosmoGenerator
+	Debouncer      *Debouncer
 }

 func (r *Resolver) apiKeyCanAccessRef(ctx context.Context, ref string, publish bool) (string, error) {
@@ -174,8 +174,9 @@ func (r *mutationResolver) UpdateSubGraph(ctx context.Context, input model.Input
 		return nil, err
 	}

-	// Publish schema update to subscribers
-	go func() {
+	// Debounce schema update publishing so rapid successive updates for the
+	// same org+ref only trigger one config generation.
+	r.Debouncer.Debounce(orgId+":"+input.Ref, func() {
 		services, lastUpdate := r.Cache.Services(orgId, input.Ref, "")
 		r.Logger.Info("Publishing schema update after subgraph change",
 			"ref", input.Ref,
@@ -191,19 +192,11 @@ func (r *mutationResolver) UpdateSubGraph(ctx context.Context, input model.Input
 				r.Logger.Error("fetch subgraph for update notification", "error", err)
 				continue
 			}
-			subGraphs[i] = &model.SubGraph{
-				ID:        sg.ID.String(),
-				Service:   sg.Service,
-				URL:       sg.Url,
-				WsURL:     sg.WSUrl,
-				Sdl:       sg.Sdl,
-				ChangedBy: sg.ChangedBy,
-				ChangedAt: sg.ChangedAt,
-			}
+			subGraphs[i] = r.toGqlSubGraph(sg)
 		}

-		// Generate Cosmo router config
-		cosmoConfig, err := GenerateCosmoRouterConfig(subGraphs)
+		// Generate Cosmo router config (concurrency-limited)
+		cosmoConfig, err := r.CosmoGenerator.Generate(context.Background(), subGraphs)
 		if err != nil {
 			r.Logger.Error("generate cosmo config for update", "error", err)
 			cosmoConfig = "" // Send empty if generation fails
@@ -225,7 +218,7 @@ func (r *mutationResolver) UpdateSubGraph(ctx context.Context, input model.Input
 		)

 		r.PubSub.Publish(input.Ref, update)
-	}()
+	})

 	return r.toGqlSubGraph(subGraph), nil
 }
@@ -292,30 +285,16 @@ func (r *queryResolver) Supergraph(ctx context.Context, ref string, isAfter *str
 		}, nil
 	}
 	subGraphs := make([]*model.SubGraph, len(services))
+	serviceSDLs := make([]string, len(services))
 	for i, id := range services {
 		sg, err := r.fetchSubGraph(ctx, id)
 		if err != nil {
 			return nil, err
 		}
-		subGraphs[i] = &model.SubGraph{
-			ID:        sg.ID.String(),
-			Service:   sg.Service,
-			URL:       sg.Url,
-			WsURL:     sg.WSUrl,
-			Sdl:       sg.Sdl,
-			ChangedBy: sg.ChangedBy,
-			ChangedAt: sg.ChangedAt,
-		}
+		subGraphs[i] = r.toGqlSubGraph(sg)
+		serviceSDLs[i] = sg.Sdl
 	}

-	var serviceSDLs []string
-	for _, id := range services {
-		sg, err := r.fetchSubGraph(ctx, id)
-		if err != nil {
-			return nil, err
-		}
-		serviceSDLs = append(serviceSDLs, sg.Sdl)
-	}
 	sdl, err := sdlmerge.MergeSDLs(serviceSDLs...)
 	if err != nil {
 		return nil, err
@@ -388,8 +367,8 @@ func (r *queryResolver) LatestSchema(ctx context.Context, ref string) (*model.Sc
 		}
 	}

-	// Generate Cosmo router config
-	cosmoConfig, err := GenerateCosmoRouterConfig(subGraphs)
+	// Generate Cosmo router config (concurrency-limited)
+	cosmoConfig, err := r.CosmoGenerator.Generate(ctx, subGraphs)
 	if err != nil {
 		r.Logger.Error("generate cosmo config", "error", err)
 		cosmoConfig = "" // Return empty if generation fails
@@ -432,9 +411,6 @@ func (r *subscriptionResolver) SchemaUpdates(ctx context.Context, ref string) (<

 	// Send initial state immediately
 	go func() {
-		// Use background context for async operation
-		bgCtx := context.Background()
-
 		services, lastUpdate := r.Cache.Services(orgId, ref, "")
 		r.Logger.Info("Preparing initial schema update",
 			"ref", ref,
@@ -445,24 +421,16 @@ func (r *subscriptionResolver) SchemaUpdates(ctx context.Context, ref string) (<

 		subGraphs := make([]*model.SubGraph, len(services))
 		for i, id := range services {
-			sg, err := r.fetchSubGraph(bgCtx, id)
+			sg, err := r.fetchSubGraph(ctx, id)
 			if err != nil {
 				r.Logger.Error("fetch subgraph for initial update", "error", err, "id", id)
 				continue
 			}
-			subGraphs[i] = &model.SubGraph{
-				ID:        sg.ID.String(),
-				Service:   sg.Service,
-				URL:       sg.Url,
-				WsURL:     sg.WSUrl,
-				Sdl:       sg.Sdl,
-				ChangedBy: sg.ChangedBy,
-				ChangedAt: sg.ChangedAt,
-			}
+			subGraphs[i] = r.toGqlSubGraph(sg)
 		}

-		// Generate Cosmo router config
-		cosmoConfig, err := GenerateCosmoRouterConfig(subGraphs)
+		// Generate Cosmo router config (concurrency-limited)
+		cosmoConfig, err := r.CosmoGenerator.Generate(ctx, subGraphs)
 		if err != nil {
 			r.Logger.Error("generate cosmo config", "error", err)
 			cosmoConfig = "" // Send empty if generation fails
@@ -483,7 +451,11 @@ func (r *subscriptionResolver) SchemaUpdates(ctx context.Context, ref string) (<
 			"cosmoConfigLength", len(cosmoConfig),
 		)

-		ch <- update
+		select {
+		case ch <- update:
+		case <-ctx.Done():
+			return
+		}
 	}()

 	// Clean up subscription when context is done