chore(deps): update module github.com/fxamacker/cbor/v2 to v2.9.6

Automated dependency update. All tests passed.

.github/workflows/autoupdate.yaml

@@ -1,4 +1,4 @@
-name: Autoupdate go.mod and go.sum
+name: Update dependencies
 
 on:
   workflow_dispatch:
@@ -6,15 +6,15 @@ on:
     - cron: "0 3 * * *"
 
 permissions:
-  contents: write
   actions: write
+  contents: write
+  issues: write
   pull-requests: write
-  security-events: write
 
 jobs:
-  autoupdate:
-    uses: lukaszraczylo/shared-actions/.github/workflows/go-autoupdate.yaml@main
+  update:
+    uses: lukaszraczylo/shared-actions/.github/workflows/renovate-autoupdate.yaml@main
     with:
       go-version: ">=1.26"
-      release-workflow: "release.yaml"
-    secrets: inherit
+      node: false
+      release-workflow: release.yaml

.github/workflows/release.yaml

@@ -32,7 +32,9 @@ jobs:
             - name: Install dependencies
               run: go mod download
 
-            - uses: engineerd/[email protected]
+            - uses: helm/[email protected]
+              with:
+                  version: v0.24.0
 
             - name: Run e2e tests
               run: |

Dockerfile

@@ -1,5 +1,9 @@
 # Build stage
-FROM golang:1.25-alpine AS builder
+FROM golang:1.26-alpine AS builder
+
+# Populated by buildx per platform; without this declaration the
+# GOARCH=${TARGETARCH:-amd64} below silently builds amd64 for every platform.
+ARG TARGETARCH
 
 # Install ca-certificates for HTTPS support
 RUN apk add --no-cache ca-certificates

README.md

@@ -592,7 +592,7 @@ Complete configuration reference:
 | `controller.workerThreads` | Concurrent reconciliation workers | `5` | `10`, `20` |
 | `controller.rateLimitQPS` | API rate limit (queries per second) | `50.0` | `100.0`, `200.0` |
 | `controller.rateLimitBurst` | API burst allowance | `100` | `200`, `500` |
-| `controller.resyncPeriod` | Full cache resync period | `10m` | `30m` |
+| `controller.resyncPeriod` | Full cache resync period (safety net; drift repair is event-driven) | `1h` | `30m` |
 | `controller.verifySourceFreshness` | Verify cache against a direct API read before mirroring | `false` | `true`, `false` |
 | **Namespace Filtering** | | | |
 | `controller.excludedNamespaces` | Comma-separated namespace exclusion list | `""` | `kube-system,kube-public,kube-node-lease` |
@@ -623,8 +623,8 @@ When running the binary directly:
 - `--worker-threads int` - Concurrent workers (default: 5)
 - `--rate-limit-qps float32` - API rate limit (default: 50.0)
 - `--rate-limit-burst int` - API burst limit (default: 100)
-- `--resync-period duration` - Full cache resync period (default: 10m)
-- `--verify-source-freshness` - Verify cache against a direct API read before mirroring (default: true)
+- `--resync-period duration` - Full cache resync period, a safety net for missed watch events (default: 1h)
+- `--verify-source-freshness` - Verify cache against a direct API read before mirroring (default: false)
 
 **Namespace Filtering:**
 - `--excluded-namespaces string` - Comma-separated exclusion list

charts/kubemirror/README.md

@@ -53,7 +53,7 @@ Defaults are taken from [`values.yaml`](values.yaml).
 | `controller.leaderElectionID` | `"kubemirror-controller-leader"` | Lease name (`--leader-election-id`). |
 | `controller.resourceTypes` | `[]` | Resource types to mirror (`--resource-types`). Empty enables auto-discovery. |
 | `controller.discoveryInterval` | `"5m"` | Auto-discovery interval (`--discovery-interval`). |
-| `controller.resyncPeriod` | `"10m"` | Cache resync period (`--resync-period`). |
+| `controller.resyncPeriod` | `"1h"` | Cache resync period, safety net only (`--resync-period`). |
 | `controller.maxTargets` | `100` | Max target namespaces per resource (`--max-targets`). |
 | `controller.workerThreads` | `5` | Concurrent reconcile workers (`--worker-threads`). |
 | `controller.rateLimitQPS` | `50.0` | API QPS limit (`--rate-limit-qps`). |

charts/kubemirror/templates/deployment.yaml

@@ -43,9 +43,7 @@ spec:
             - --worker-threads={{ .Values.controller.workerThreads }}
             - --rate-limit-qps={{ .Values.controller.rateLimitQPS }}
             - --rate-limit-burst={{ .Values.controller.rateLimitBurst }}
-            {{- if .Values.controller.verifySourceFreshness }}
-            - --verify-source-freshness=true
-            {{- end }}
+            - --verify-source-freshness={{ .Values.controller.verifySourceFreshness }}
             {{- if .Values.controller.lazyWatcherInit }}
             - --lazy-watcher-init=true
             {{- end }}

charts/kubemirror/values.yaml

@@ -54,10 +54,11 @@ controller:
   # How often to rediscover available resources in the cluster
   discoveryInterval: "5m"
 
-  # Cache resync period - how often to refresh all cached resources
+  # Cache resync period - safety net for missed watch events; mirror drift
+  # is repaired event-driven, so this can stay long
   # Higher values reduce memory churn and API load
   # Default: 10m (was 30s in earlier versions)
-  resyncPeriod: "10m"
+  resyncPeriod: "1h"
 
   # Resource limits
   maxTargets: 100

cmd/kubemirror/main.go

@@ -108,14 +108,16 @@ func main() {
 		"QPS rate limit for API server requests.")
 	flag.IntVar(&rateLimitBurst, "rate-limit-burst", 100,
 		"Burst limit for API server requests.")
-	flag.DurationVar(&resyncPeriod, "resync-period", 10*time.Minute,
-		"Period for resyncing all resources (catches updates missed due to informer cache delays).")
-	flag.BoolVar(&verifySourceFreshness, "verify-source-freshness", true,
+	flag.DurationVar(&resyncPeriod, "resync-period", time.Hour,
+		"Period for the full informer resync. Sources, mirrors, and namespaces "+
+			"are watched, and mirror drift is repaired event-driven, so the resync "+
+			"is only a safety net for missed watch events.")
+	flag.BoolVar(&verifySourceFreshness, "verify-source-freshness", false,
 		"Verify source resource freshness by comparing cache with direct API read. "+
-			"Prevents mirroring stale data and missed orphan cleanups when the informer "+
-			"cache lags behind watch events. Trade-off: one extra API call per reconcile "+
-			"when the cache is stale. Disable only if you are confident your cluster's "+
-			"watch latency is negligible.")
+			"Converges a few seconds faster when the informer cache lags behind watch "+
+			"events, at the cost of one direct apiserver GET per reconcile. Off by "+
+			"default: a stale read self-corrects on the next watch event, and update "+
+			"conflicts requeue automatically.")
 	flag.BoolVar(&lazyWatcherInit, "lazy-watcher-init", false,
 		"Enable lazy watcher initialization - only create informers for resource types that have resources marked for mirroring. "+
 			"Significantly reduces memory usage by avoiding watchers for unused resource types. "+

go.mod

@@ -3,14 +3,14 @@ module github.com/lukaszraczylo/kubemirror
 go 1.26.0
 
 require (
-	github.com/go-logr/logr v1.4.3
-	github.com/lukaszraczylo/oss-telemetry v0.2.3
-	github.com/stretchr/testify v1.11.1
+	github.com/go-logr/logr v1.4.4
+	github.com/lukaszraczylo/oss-telemetry v0.2.5
+	github.com/stretchr/testify v1.12.1
 	gopkg.in/yaml.v3 v3.0.1
-	k8s.io/api v0.36.2
-	k8s.io/apimachinery v0.36.2
-	k8s.io/client-go v0.36.2
-	sigs.k8s.io/controller-runtime v0.24.1
+	k8s.io/api v0.37.1
+	k8s.io/apimachinery v0.37.1
+	k8s.io/client-go v0.37.1
+	sigs.k8s.io/controller-runtime v0.25.2
 )
 
 require (
@@ -20,22 +20,22 @@ require (
 	github.com/emicklei/go-restful/v3 v3.13.0 // indirect
 	github.com/evanphx/json-patch/v5 v5.9.11 // indirect
 	github.com/fsnotify/fsnotify v1.10.1 // indirect
-	github.com/fxamacker/cbor/v2 v2.9.2 // indirect
+	github.com/fxamacker/cbor/v2 v2.9.6 // indirect
 	github.com/go-logr/zapr v1.3.0 // indirect
-	github.com/go-openapi/jsonpointer v0.23.1 // indirect
-	github.com/go-openapi/jsonreference v0.21.6 // indirect
-	github.com/go-openapi/swag v0.26.1 // indirect
-	github.com/go-openapi/swag/cmdutils v0.26.1 // indirect
-	github.com/go-openapi/swag/conv v0.26.1 // indirect
-	github.com/go-openapi/swag/fileutils v0.26.1 // indirect
-	github.com/go-openapi/swag/jsonname v0.26.1 // indirect
-	github.com/go-openapi/swag/jsonutils v0.26.1 // indirect
-	github.com/go-openapi/swag/loading v0.26.1 // indirect
-	github.com/go-openapi/swag/mangling v0.26.1 // indirect
-	github.com/go-openapi/swag/netutils v0.26.1 // indirect
-	github.com/go-openapi/swag/stringutils v0.26.1 // indirect
-	github.com/go-openapi/swag/typeutils v0.26.1 // indirect
-	github.com/go-openapi/swag/yamlutils v0.26.1 // indirect
+	github.com/go-openapi/jsonpointer v1.0.2 // indirect
+	github.com/go-openapi/jsonreference v1.0.3 // indirect
+	github.com/go-openapi/swag v0.29.2 // indirect
+	github.com/go-openapi/swag/cmdutils v0.29.2 // indirect
+	github.com/go-openapi/swag/conv v0.29.2 // indirect
+	github.com/go-openapi/swag/fileutils v0.29.2 // indirect
+	github.com/go-openapi/swag/jsonutils v0.29.2 // indirect
+	github.com/go-openapi/swag/loading v0.29.2 // indirect
+	github.com/go-openapi/swag/mangling v0.29.2 // indirect
+	github.com/go-openapi/swag/netutils v0.29.2 // indirect
+	github.com/go-openapi/swag/pools v0.29.2 // indirect
+	github.com/go-openapi/swag/stringutils v0.29.2 // indirect
+	github.com/go-openapi/swag/typeutils v0.29.2 // indirect
+	github.com/go-openapi/swag/yamlutils v0.29.2 // indirect
 	github.com/google/gnostic-models v0.7.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
@@ -43,34 +43,34 @@ require (
 	github.com/modern-go/reflect2 v1.0.3-0.20250322232337-35a7c28c31ee // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/prometheus/client_golang v1.23.2 // indirect
-	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.69.0 // indirect
-	github.com/prometheus/procfs v0.20.1 // indirect
+	github.com/prometheus/client_golang v1.24.1 // indirect
+	github.com/prometheus/client_model v0.6.3 // indirect
+	github.com/prometheus/common v0.72.0 // indirect
+	github.com/prometheus/procfs v0.22.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
-	github.com/stretchr/objx v0.5.2 // indirect
+	github.com/stretchr/objx v0.5.3 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	go.uber.org/zap v1.28.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.4 // indirect
-	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/net v0.56.0 // indirect
-	golang.org/x/oauth2 v0.36.0 // indirect
-	golang.org/x/sync v0.21.0 // indirect
-	golang.org/x/sys v0.46.0 // indirect
-	golang.org/x/term v0.44.0 // indirect
-	golang.org/x/text v0.38.0 // indirect
-	golang.org/x/time v0.15.0 // indirect
+	go.yaml.in/yaml/v3 v3.0.5 // indirect
+	golang.org/x/net v0.59.0 // indirect
+	golang.org/x/oauth2 v0.37.0 // indirect
+	golang.org/x/sync v0.23.0 // indirect
+	golang.org/x/sys v0.48.0 // indirect
+	golang.org/x/term v0.46.0 // indirect
+	golang.org/x/text v0.42.0 // indirect
+	golang.org/x/time v0.16.0 // indirect
 	gomodules.xyz/jsonpatch/v2 v2.5.0 // indirect
-	google.golang.org/protobuf v1.36.12-0.20260120151049-f2248ac996af // indirect
+	google.golang.org/protobuf v1.36.12 // indirect
 	gopkg.in/evanphx/json-patch.v4 v4.13.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect
-	k8s.io/apiextensions-apiserver v0.36.2 // indirect
+	k8s.io/apiextensions-apiserver v0.37.1 // indirect
 	k8s.io/klog/v2 v2.140.0 // indirect
-	k8s.io/kube-openapi v0.0.0-20260624041617-8f3fa4921821 // indirect
-	k8s.io/utils v0.0.0-20260626114624-be93311217bd // indirect
+	k8s.io/kube-openapi v0.0.0-20260821135717-be32def86098 // indirect
+	k8s.io/utils v0.0.0-20260707023825-cf1189d6abe3 // indirect
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
-	sigs.k8s.io/structured-merge-diff/v6 v6.4.0 // indirect
+	sigs.k8s.io/structured-merge-diff/v6 v6.4.2 // indirect
 	sigs.k8s.io/yaml v1.6.0 // indirect
 )

go.sum

@@ -16,46 +16,46 @@ github.com/evanphx/json-patch/v5 v5.9.11 h1:/8HVnzMq13/3x9TPvjG08wUGqBTmZBsCWzjT
 github.com/evanphx/json-patch/v5 v5.9.11/go.mod h1:3j+LviiESTElxA4p3EMKAB9HXj3/XEtnUf6OZxqIQTM=
 github.com/fsnotify/fsnotify v1.10.1 h1:b0/UzAf9yR5rhf3RPm9gf3ehBPpf0oZKIjtpKrx59Ho=
 github.com/fsnotify/fsnotify v1.10.1/go.mod h1:TLheqan6HD6GBK6PrDWyDPBaEV8LspOxvPSjC+bVfgo=
-github.com/fxamacker/cbor/v2 v2.9.2 h1:X4Ksno9+x3cz0TZv69ec1hxP/+tymuR8PXQJyDwfh78=
-github.com/fxamacker/cbor/v2 v2.9.2/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
-github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
-github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/fxamacker/cbor/v2 v2.9.6 h1:NHZPxuUjJXQjX9itA785y/5NKSlI4HQ+S7noZsmI7hs=
+github.com/fxamacker/cbor/v2 v2.9.6/go.mod h1:4EaZp6ClVunETjQ4GHmGNzysDK91Lr+r6Yz6tJqzVCw=
+github.com/go-logr/logr v1.4.4 h1:tG4xh9yMsRCAiodLVTxyrkzSZ9+o0L1Kg/+cPVcbP/8=
+github.com/go-logr/logr v1.4.4/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
 github.com/go-logr/zapr v1.3.0 h1:XGdV8XW8zdwFiwOA2Dryh1gj2KRQyOOoNmBy4EplIcQ=
 github.com/go-logr/zapr v1.3.0/go.mod h1:YKepepNBd1u/oyhd/yQmtjVXmm9uML4IXUgMOwR8/Gg=
-github.com/go-openapi/jsonpointer v0.23.1 h1:1HBACs7XIwR2RcmItfdSFlALhGbe6S92p0ry4d1GWg4=
-github.com/go-openapi/jsonpointer v0.23.1/go.mod h1:iWRmZTrGn7XwYhtPt/fvdSFj1OfNBngqRT2UG3BxSqY=
-github.com/go-openapi/jsonreference v0.21.6 h1:NZ5nGfnaM1n4I43Xjm1e5/M2GjOwQwndQz22uhxwD+Y=
-github.com/go-openapi/jsonreference v0.21.6/go.mod h1:xzbgtQ3ZbWxvET3AxdzCJlJt6vkovbf+IfSPJjD0tUY=
-github.com/go-openapi/swag v0.26.1 h1:l5sVEyVpwj+DDYeZyo7wQI/Ebn/mKYIyGB/pFwAfGoQ=
-github.com/go-openapi/swag v0.26.1/go.mod h1:yNY38BbIVthxbkDtq1UHBCGasBqjakW3lCR6ANzdBEw=
-github.com/go-openapi/swag/cmdutils v0.26.1 h1:f2iE1ijYaJ3nuu5PaEMx3zpEhzhZFgivCJObWEObLIQ=
-github.com/go-openapi/swag/cmdutils v0.26.1/go.mod h1:Sm1MVFMkF6guJJ+pQqHnQA3N0j9qALV3NxzDSv6bETM=
-github.com/go-openapi/swag/conv v0.26.1 h1:slr5FVkg9Wc3Y5zcwenD8Sd/PQ94b2I/QJI7N7KTBpg=
-github.com/go-openapi/swag/conv v0.26.1/go.mod h1:mvQXgPptZk9GTrFgGwWvT4q+dN+zQej9JfmGwnipz1A=
-github.com/go-openapi/swag/fileutils v0.26.1 h1:K1XCM2CGhfNsc6YDt6v7Q5+1e59rftYWdcu/isZhvFw=
-github.com/go-openapi/swag/fileutils v0.26.1/go.mod h1:mYUgxQAKX4ShS3qvvySx+/9yrlUnDhjiD1CalaQl8lQ=
-github.com/go-openapi/swag/jsonname v0.26.1 h1:VReupaV6WxlAsCn0e4DUfgV6bPmINnPpyJDLqSfNPcE=
-github.com/go-openapi/swag/jsonname v0.26.1/go.mod h1:OvdW6BoWoj33pTfi7x9vFrgmT+fk7aw0BRwvCE0YOuc=
-github.com/go-openapi/swag/jsonutils v0.26.1 h1:2hdBfFkHg+7Wrz2VsCbeyR6hzkRDs7AztnMR2u84yOY=
-github.com/go-openapi/swag/jsonutils v0.26.1/go.mod h1:U+RMJH3wa+6BRiphuRtIyI8fW9HPFqFQ4sHk2oRx0UQ=
-github.com/go-openapi/swag/jsonutils/fixtures_test v0.26.1 h1:1CD7NiLLb/TXl3tOnFYU4b+mNfb5rtgHkaA+q7RMYYQ=
-github.com/go-openapi/swag/jsonutils/fixtures_test v0.26.1/go.mod h1:ZWafc8nMdYzTE3uYY6W86f0n46+IF0g4uUyRhJw/kXc=
-github.com/go-openapi/swag/loading v0.26.1 h1:E9K4wqXeROlhjFQ13K9zMz6ojFGXIggGe+ad1odrK9w=
-github.com/go-openapi/swag/loading v0.26.1/go.mod h1:3qvRIlWzWdq1HvmldwmuJ2ohpcAryN6xVt2OTKd0/7E=
-github.com/go-openapi/swag/mangling v0.26.1 h1:gpYI4WuPKFJJVjV5cDLGlDVJhFIxYjQc7yN5eEb4CqM=
-github.com/go-openapi/swag/mangling v0.26.1/go.mod h1:POETDH01hqAdASXfw7ISEd9bCOE6xBHOt8NHmGZRmYM=
-github.com/go-openapi/swag/netutils v0.26.1 h1:BNctoc39WTAUMxyAs355fExOPzMZtPbZ0ZZ1Am2FR5M=
-github.com/go-openapi/swag/netutils v0.26.1/go.mod h1:y02vByhZhQPAVwOX+0KipXFZ/hUbk6G/Enhf5rGaOkQ=
-github.com/go-openapi/swag/stringutils v0.26.1 h1:f88uYyTso7TnHrKM/bUBsQ5e2wKf37cpgo6pvbzd9yU=
-github.com/go-openapi/swag/stringutils v0.26.1/go.mod h1:Sc6d3bU8fgk5AyZR8/8jEQ+Is/Ald+TD/IIggPN8UJk=
-github.com/go-openapi/swag/typeutils v0.26.1 h1:yg42FgMzRR6PVQ3M3qHz1s+Y6/P4HoJ3cBarXa3OVnU=
-github.com/go-openapi/swag/typeutils v0.26.1/go.mod h1:VfnV+oUtSP2vCSCn2aJgnr8OevUYemyIzzS1VOzS10o=
-github.com/go-openapi/swag/yamlutils v0.26.1 h1:0TSLK+lXs9vfIhAWzBeI/lOzEnIoot6WTCO1aAeWFTk=
-github.com/go-openapi/swag/yamlutils v0.26.1/go.mod h1:7W5b7PRX9MxwL7TjeG7H8HkyBGRsIDRObhyMWFgBI2M=
-github.com/go-openapi/testify/enable/yaml/v2 v2.5.1 h1:q9NtHwK4qHF7yZziBPvZyv7zWAIk8ok88Gh2mR6Jpc8=
-github.com/go-openapi/testify/enable/yaml/v2 v2.5.1/go.mod h1:JW0MXIotCYps/XsgJnG3a8Q7rE5xAiBwoOD5OfaIQBk=
-github.com/go-openapi/testify/v2 v2.5.1 h1:TMdhCaw8fUNraVSf3Omoob1dO/AzBfhtFAPW0an6sBo=
-github.com/go-openapi/testify/v2 v2.5.1/go.mod h1:SgsVHtfooshd0tublTtJ50FPKhujf47YRqauXXOUxfw=
+github.com/go-openapi/jsonpointer v1.0.2 h1:NbW7xT2b+l7x+JefiPGDsZWsrLk1ogrz4AHK1TTzMt8=
+github.com/go-openapi/jsonpointer v1.0.2/go.mod h1:N0rI4MbNKD7xAFTiHtB+5Nhrg2j/wwYg7m7Fmb4/jk8=
+github.com/go-openapi/jsonreference v1.0.3 h1:5rDbq+JsjCv6/nUDDJt83nLZoADI4w03uvHXer+4aYQ=
+github.com/go-openapi/jsonreference v1.0.3/go.mod h1:OJSlMXHysgH272D9z2tiy2MGe5A9vQLHaCPb6KbYdE4=
+github.com/go-openapi/swag v0.29.2 h1:9n8frkcsuQRA0INU31VbxNxt1zBaHxrHYGEf5BUjFi4=
+github.com/go-openapi/swag v0.29.2/go.mod h1:RkCiX1gCVXWgLOavDXE3ALJrQ/VO2ziiIzOUs3z10xo=
+github.com/go-openapi/swag/cmdutils v0.29.2 h1:cXEzX/nWCODon251f+1HgL75/R4XXML5IZxgLCWMoro=
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@@ -98,24 +98,24 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
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+google.golang.org/protobuf v1.36.12/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
@@ -159,27 +159,27 @@ gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-k8s.io/api v0.36.2 h1:TF6YDLIzKfccK7cq9YpTcGX8TJmEkHVRv78DM51fRYY=
-k8s.io/api v0.36.2/go.mod h1:F4LbMO4brjZYh7yFkXWhynSvtB7YauxV4c+HHkNRGNg=
-k8s.io/apiextensions-apiserver v0.36.2 h1:3O5gqOj/dt2XWWbpMe+TXWpE9yU6pjM/tXxtHHJT/K4=
-k8s.io/apiextensions-apiserver v0.36.2/go.mod h1:cL1tBWe8XSaP1H30iWKGo7hf6iAUUUJPEU70dskmAnA=
-k8s.io/apimachinery v0.36.2 h1:0PE/W/WNy1UX61NLbXY5TMbJ6UwLL6E6lAPkYrKFxbQ=
-k8s.io/apimachinery v0.36.2/go.mod h1:fvf/HOLXq9RId0rnDIbN1OEBvHXdQbLMM8nu0LcBUf4=
-k8s.io/client-go v0.36.2 h1:bfgxmFKc9CgqsgX4xKLAAdmTQlWee7Ob/HlDOrJ5TBI=
-k8s.io/client-go v0.36.2/go.mod h1:1vgO4OAlfPnoLcb+Rze2GF5rAr14w8qjrYMoyXJzQj0=
+k8s.io/api v0.37.1 h1:l6N77U7tjwB5L056bgrBTJIEdevac/naBZ3iSvDNfpM=
+k8s.io/api v0.37.1/go.mod h1:zSlbB1YpJ1YQlFVQy20UYll81UJSJJUMLhkhvg6Z78M=
+k8s.io/apiextensions-apiserver v0.37.1 h1:7fIQG8eThDSTVYBWg/DOpI8v5wYfKCo0N8/TDMjj+zY=
+k8s.io/apiextensions-apiserver v0.37.1/go.mod h1:1Q3ujWwHgnhBoGsdmGORflwK1sDFmuaqH1OsMDWk2Gs=
+k8s.io/apimachinery v0.37.1 h1:hGCYyvKHCwtwMitj2vU4vYx0Z16N9GyZk9BBnz0wDAE=
+k8s.io/apimachinery v0.37.1/go.mod h1:jF84AyUi/IRIXRot5f+lm6MpxoWI+F1XgjaMmwCdTFw=
+k8s.io/client-go v0.37.1 h1:QTv/5ha4jAHtW9qxxVBkQVFBRDb4jHfFopQqqMdc+wM=
+k8s.io/client-go v0.37.1/go.mod h1:dnAPtTnCNY38Ho04D2KdY1F4IKausa9UbqaAZKl60SY=
 k8s.io/klog/v2 v2.140.0 h1:Tf+J3AH7xnUzZyVVXhTgGhEKnFqye14aadWv7bzXdzc=
 k8s.io/klog/v2 v2.140.0/go.mod h1:o+/RWfJ6PwpnFn7OyAG3QnO47BFsymfEfrz6XyYSSp0=
-k8s.io/kube-openapi v0.0.0-20260624041617-8f3fa4921821 h1:m2wZhD5+vJZyCVkTvUHIfaiXc/mdt3Pxyx3vUnGsKzU=
-k8s.io/kube-openapi v0.0.0-20260624041617-8f3fa4921821/go.mod h1:V/QaCUYDa+0QpcHhVVc5l99Uz56wEMEXBSj9oCDkNDY=
-k8s.io/utils v0.0.0-20260626114624-be93311217bd h1:Ea7fgQ5we8Y9T0OX5o0dAHzQOBRI07D/dEYRaB9ZZEs=
-k8s.io/utils v0.0.0-20260626114624-be93311217bd/go.mod h1:xDxuJ0whA3d0I4mf/C4ppKHxXynQ+fxnkmQH0vTHnuk=
-sigs.k8s.io/controller-runtime v0.24.1 h1:miPEwrmirImAvgME1L9qebGHrOnGJoVmVdtOU9fRfo4=
-sigs.k8s.io/controller-runtime v0.24.1/go.mod h1:vFkfY5fGt5xAC/sKb8IBFKgWPNKG9OUG29dR8Y2wImw=
+k8s.io/kube-openapi v0.0.0-20260821135717-be32def86098 h1:z5+pcu1jTyKK5mNTe2/+x+U6Uuv9jRVOJQLaBJJMpeI=
+k8s.io/kube-openapi v0.0.0-20260821135717-be32def86098/go.mod h1:0/mqHCVhlumdJ3BhCfnjSZQE037nAhNodh1/hK0T8/I=
+k8s.io/utils v0.0.0-20260707023825-cf1189d6abe3 h1:jVkFFVfXdXP74B/zbO3hM3hpSFD0xvhQ5U686DPurkE=
+k8s.io/utils v0.0.0-20260707023825-cf1189d6abe3/go.mod h1:M2s5JB1lIYP3jzZdorPLHXIPJzt9vv2muW5a6L9DtNM=
+sigs.k8s.io/controller-runtime v0.25.2 h1:bEkK3PVOIVK9X8QWLGVhJgmFc++47vfT6wakSzAOLsQ=
+sigs.k8s.io/controller-runtime v0.25.2/go.mod h1:4QqLdT6z/L6Olj8JJCtvztid4/fnIiYsfaTFScegctc=
 sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 h1:IpInykpT6ceI+QxKBbEflcR5EXP7sU1kvOlxwZh5txg=
 sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730/go.mod h1:mdzfpAEoE6DHQEN0uh9ZbOCuHbLK5wOm7dK4ctXE9Tg=
 sigs.k8s.io/randfill v1.0.0 h1:JfjMILfT8A6RbawdsK2JXGBR5AQVfd+9TbzrlneTyrU=
 sigs.k8s.io/randfill v1.0.0/go.mod h1:XeLlZ/jmk4i1HRopwe7/aU3H5n1zNUcX6TM94b3QxOY=
-sigs.k8s.io/structured-merge-diff/v6 v6.4.0 h1:qmp2e3ZfFi1/jJbDGpD4mt3wyp6PE1NfKHCYLqgNQJo=
-sigs.k8s.io/structured-merge-diff/v6 v6.4.0/go.mod h1:M3W8sfWvn2HhQDIbGWj3S099YozAsymCo/wrT5ohRUE=
+sigs.k8s.io/structured-merge-diff/v6 v6.4.2 h1:qdOxHwrl2Kaag1aQEarlYcOA9vSyGCp3CIki3aW8c4Q=
+sigs.k8s.io/structured-merge-diff/v6 v6.4.2/go.mod h1:M3W8sfWvn2HhQDIbGWj3S099YozAsymCo/wrT5ohRUE=
 sigs.k8s.io/yaml v1.6.0 h1:G8fkbMSAFqgEFgh4b1wmtzDnioxFCUgTZhlbj5P9QYs=
 sigs.k8s.io/yaml v1.6.0/go.mod h1:796bPqUfzR/0jLAl6XjHl3Ck7MiyVv8dbTdyT3/pMf4=

pkg/controller/namespace_reconciler.go

@@ -196,8 +196,9 @@ func (r *NamespaceReconciler) reconcileResourceType(ctx context.Context, rt conf
 // (pattern parsing/validation, namespace listing, max-targets clamping) lives in
 // exactly one place, mirroring the reconcileMirror delegation below.
 func (r *NamespaceReconciler) resolveTargetNamespaces(ctx context.Context, source *unstructured.Unstructured) ([]string, error) {
-	return r.newSourceReconciler(source.GroupVersionKind()).
+	targets, _, err := r.newSourceReconciler(source.GroupVersionKind()).
 		resolveTargetNamespaces(ctx, source)
+	return targets, err
 }
 
 // reconcileMirror creates or updates a mirror in the target namespace by

pkg/controller/source_reconciler.go

@@ -238,8 +238,9 @@ func (r *SourceReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctr
 		return ctrl.Result{Requeue: true}, nil
 	}
 
-	// Get target namespaces
-	targetNamespaces, err := r.resolveTargetNamespaces(ctx, sourceObj)
+	// Get target namespaces (nsInfo is reused for orphan cleanup below so a
+	// reconcile pass performs a single namespace LIST instead of two)
+	targetNamespaces, nsInfo, err := r.resolveTargetNamespaces(ctx, sourceObj)
 	if err != nil {
 		logger.Error(err, "failed to resolve target namespaces")
 		if r.CircuitBreaker != nil {
@@ -268,7 +269,7 @@ func (r *SourceReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctr
 	}
 
 	// Clean up orphaned mirrors (namespaces that no longer match the target criteria)
-	orphanedCount, err := r.cleanupOrphanedMirrors(ctx, sourceObj, targetNamespaces)
+	orphanedCount, err := r.cleanupOrphanedMirrors(ctx, sourceObj, targetNamespaces, nsInfo)
 	if err != nil {
 		logger.Error(err, "failed to cleanup orphaned mirrors")
 		// Don't fail reconciliation for cleanup errors, just log them
@@ -356,19 +357,12 @@ func (r *SourceReconciler) reconcileMirror(ctx context.Context, source runtime.O
 		return fmt.Errorf("failed to get existing mirror: %w", err)
 	}
 
-	// If freshness verification is enabled and mirror exists, verify it's fresh too
-	if err == nil && r.Config.VerifySourceFreshness && r.APIReader != nil {
-		fresh := &unstructured.Unstructured{}
-		fresh.SetGroupVersionKind(sourceUnstructured.GroupVersionKind())
-		if apiErr := r.APIReader.Get(ctx, client.ObjectKey{Namespace: targetNs, Name: sourceObj.GetName()}, fresh); apiErr == nil {
-			if fresh.GetResourceVersion() != existing.GetResourceVersion() {
-				logger.V(2).Info("mirror cache stale, using fresh API version",
-					"cachedRV", existing.GetResourceVersion(),
-					"freshRV", fresh.GetResourceVersion())
-				existing = fresh
-			}
-		}
-	}
+	// The cached mirror is intentionally NOT re-verified against the apiserver.
+	// A stale cache read is harmless here: content drift is detected via the
+	// source hash annotation, and a stale resourceVersion makes the Update below
+	// fail with a conflict, which requeues the source. A direct read at this
+	// point costs one apiserver GET per target namespace on every reconcile
+	// (sources x targets x resync), which overloads the control plane.
 
 	if err == nil {
 		// Mirror exists - check if it's managed by us
@@ -384,9 +378,20 @@ func (r *SourceReconciler) reconcileMirror(ctx context.Context, source runtime.O
 		}
 
 		if !needsSync {
+			// The source is unchanged since the last sync, but the mirrored
+			// copy itself may have been edited in place (its bookkeeping
+			// annotations would still match the source). Rebuild the expected
+			// mirror in memory and compare content hashes to catch that.
+			drifted, driftErr := mirrorContentDrifted(source, existing, targetNs)
+			if driftErr != nil {
+				return fmt.Errorf("failed to check mirror drift: %w", driftErr)
+			}
+			if !drifted {
 				logger.V(2).Info("mirror is up to date")
 				return nil
 			}
+			logger.Info("mirror content drifted from expected state, repairing")
+		}
 
 		// Update mirror
 		updateErr := UpdateMirror(existing, source)
@@ -427,6 +432,30 @@ func (r *SourceReconciler) reconcileMirror(ctx context.Context, source runtime.O
 	return nil
 }
 
+// mirrorContentDrifted reports whether the live mirror's content diverged from
+// what mirroring the source into targetNs should produce. It rebuilds the
+// expected mirror in memory (including transformations) and compares content
+// hashes, so metadata-only differences never count as drift. This is what
+// makes drift repair event-driven instead of depending on the periodic resync.
+func mirrorContentDrifted(source runtime.Object, existing *unstructured.Unstructured, targetNs string) (bool, error) {
+	expected, err := CreateMirror(source, targetNs)
+	if err != nil {
+		return false, fmt.Errorf("failed to build expected mirror: %w", err)
+	}
+
+	expectedHash, err := hash.ComputeContentHash(expected)
+	if err != nil {
+		return false, fmt.Errorf("failed to hash expected mirror: %w", err)
+	}
+
+	existingHash, err := hash.ComputeContentHash(existing)
+	if err != nil {
+		return false, fmt.Errorf("failed to hash existing mirror: %w", err)
+	}
+
+	return expectedHash != existingHash, nil
+}
+
 // deleteAllMirrors deletes all mirrors that this source owns across the cluster.
 // It verifies ownership (managed-by label + source-reference annotation) before
 // deleting anything to avoid destroying unrelated resources that happen to share
@@ -475,14 +504,18 @@ func (r *SourceReconciler) deleteAllMirrors(ctx context.Context, sourceObj metav
 
 // cleanupOrphanedMirrors removes mirrors that exist but are no longer in the target list.
 // This handles cases where target-namespaces annotation changes (e.g., "all" → "all-labeled" or "app-*" → "prod-*").
-func (r *SourceReconciler) cleanupOrphanedMirrors(ctx context.Context, sourceObj metav1.Object, targetNamespaces []string) (int, error) {
+// The caller passes the NamespaceInfo it already listed during target
+// resolution; a nil nsInfo triggers a fresh list as a fallback.
+func (r *SourceReconciler) cleanupOrphanedMirrors(ctx context.Context, sourceObj metav1.Object, targetNamespaces []string, nsInfo *NamespaceInfo) (int, error) {
 	logger := log.FromContext(ctx)
 
-	// List all namespaces using unified method for consistency
-	nsInfo, err := r.NamespaceLister.ListNamespacesWithLabels(ctx)
+	if nsInfo == nil {
+		var err error
+		nsInfo, err = r.NamespaceLister.ListNamespacesWithLabels(ctx)
 		if err != nil {
 			return 0, fmt.Errorf("failed to list namespaces: %w", err)
 		}
+	}
 	allNamespaces := nsInfo.All
 
 	// Get GVK from source object
@@ -525,21 +558,23 @@ func (r *SourceReconciler) cleanupOrphanedMirrors(ctx context.Context, sourceObj
 }
 
 // resolveTargetNamespaces determines which namespaces should receive mirrors.
-func (r *SourceReconciler) resolveTargetNamespaces(ctx context.Context, sourceObj metav1.Object) ([]string, error) {
+// It also returns the NamespaceInfo it listed (nil when resolution ended before
+// listing) so callers can reuse it instead of issuing a second namespace LIST.
+func (r *SourceReconciler) resolveTargetNamespaces(ctx context.Context, sourceObj metav1.Object) ([]string, *NamespaceInfo, error) {
 	annotations := sourceObj.GetAnnotations()
 	if annotations == nil {
-		return nil, nil
+		return nil, nil, nil
 	}
 
 	targetNsAnnotation := annotations[constants.AnnotationTargetNamespaces]
 	if targetNsAnnotation == "" {
-		return nil, nil
+		return nil, nil, nil
 	}
 
 	// Parse patterns
 	patterns := filter.ParseTargetNamespaces(targetNsAnnotation)
 	if len(patterns) == 0 {
-		return nil, nil
+		return nil, nil, nil
 	}
 
 	// Validate patterns and log warnings for invalid ones
@@ -567,14 +602,14 @@ func (r *SourceReconciler) resolveTargetNamespaces(ctx context.Context, sourceOb
 
 		// If no valid patterns remain, return empty
 		if len(patterns) == 0 {
-			return nil, nil
+			return nil, nil, nil
 		}
 	}
 
 	// Get all namespace info in a single API call (more efficient than 3 separate calls)
 	nsInfo, err := r.NamespaceLister.ListNamespacesWithLabels(ctx)
 	if err != nil {
-		return nil, fmt.Errorf("failed to list namespaces: %w", err)
+		return nil, nil, fmt.Errorf("failed to list namespaces: %w", err)
 	}
 
 	// Resolve target namespaces using the pre-categorized namespace info
@@ -592,7 +627,7 @@ func (r *SourceReconciler) resolveTargetNamespaces(ctx context.Context, sourceOb
 		targetNamespaces = targetNamespaces[:r.Config.MaxTargetsPerResource]
 	}
 
-	return targetNamespaces, nil
+	return targetNamespaces, nsInfo, nil
 }
 
 // updateLastSyncStatus updates the source resource's sync-status annotation.
@@ -680,26 +715,43 @@ func (r *SourceReconciler) SetupWithManagerForResourceType(
 	mirrorObj := &unstructured.Unstructured{}
 	mirrorObj.SetGroupVersionKind(gvk)
 
-	// Create predicates to only watch mirror deletions
-	mirrorDeletePredicate := predicate.Funcs{
-		CreateFunc:  func(e event.CreateEvent) bool { return false },
-		UpdateFunc:  func(e event.UpdateEvent) bool { return false },
-		DeleteFunc:  func(e event.DeleteEvent) bool { return IsMirrorResource(e.Object) },
-		GenericFunc: func(e event.GenericEvent) bool { return false },
-	}
-
 	return ctrl.NewControllerManagedBy(mgr).
 		For(obj).
 		Named(controllerName).
-		// Watch mirror resources - when deleted, enqueue source for reconciliation
+		// Watch mirror resources - deletes trigger recreation, real writes
+		// trigger drift repair. This keeps mirrors converged without relying
+		// on the periodic resync.
 		Watches(
 			mirrorObj,
 			handler.EnqueueRequestsFromMapFunc(r.mapMirrorToSource),
-			builder.WithPredicates(mirrorDeletePredicate),
+			builder.WithPredicates(mirrorEventPredicate()),
 		).
 		Complete(r)
 }
 
+// mirrorEventPredicate gates the mirror watch. Deletes of managed mirrors
+// enqueue the source so the mirror is recreated. Updates enqueue the source
+// so in-place edits to a mirror are repaired event-driven; informer resync
+// replays carry an unchanged resourceVersion and are filtered out, so only
+// real writes pass. The controller's own mirror writes pass too and converge
+// in one extra reconcile that no-ops on the content comparison.
+func mirrorEventPredicate() predicate.Funcs {
+	return predicate.Funcs{
+		CreateFunc: func(e event.CreateEvent) bool { return false },
+		UpdateFunc: func(e event.UpdateEvent) bool {
+			if e.ObjectOld == nil || e.ObjectNew == nil {
+				return false
+			}
+			if e.ObjectOld.GetResourceVersion() == e.ObjectNew.GetResourceVersion() {
+				return false
+			}
+			return IsMirrorResource(e.ObjectNew)
+		},
+		DeleteFunc:  func(e event.DeleteEvent) bool { return IsMirrorResource(e.Object) },
+		GenericFunc: func(e event.GenericEvent) bool { return false },
+	}
+}
+
 // mapMirrorToSource maps a mirror resource to its source for reconciliation.
 func (r *SourceReconciler) mapMirrorToSource(ctx context.Context, obj client.Object) []reconcile.Request {
 	// Only process if this is a mirror

pkg/controller/source_reconciler_test.go

@@ -18,6 +18,7 @@ import (
 	"k8s.io/apimachinery/pkg/types"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
+	"sigs.k8s.io/controller-runtime/pkg/event"
 
 	"github.com/lukaszraczylo/kubemirror/pkg/config"
 	"github.com/lukaszraczylo/kubemirror/pkg/constants"
@@ -381,7 +382,7 @@ func TestSourceReconciler_resolveTargetNamespaces(t *testing.T) {
 				},
 			}
 
-			got, err := r.resolveTargetNamespaces(context.Background(), sourceObj)
+			got, _, err := r.resolveTargetNamespaces(context.Background(), sourceObj)
 
 			if tt.wantError {
 				require.Error(t, err)
@@ -555,7 +556,7 @@ func BenchmarkResolveTargetNamespaces(b *testing.B) {
 	b.ResetTimer()
 	b.ReportAllocs()
 	for i := 0; i < b.N; i++ {
-		_, _ = r.resolveTargetNamespaces(ctx, sourceObj)
+		_, _, _ = r.resolveTargetNamespaces(ctx, sourceObj)
 	}
 }
 
@@ -640,7 +641,7 @@ func TestSourceReconciler_cleanupOrphanedMirrors(t *testing.T) {
 	}
 
 	ctx := context.Background()
-	deletedCount, err := r.cleanupOrphanedMirrors(ctx, sourceObj, targetNamespaces)
+	deletedCount, err := r.cleanupOrphanedMirrors(ctx, sourceObj, targetNamespaces, nil)
 
 	require.NoError(t, err)
 	assert.Equal(t, 1, deletedCount, "should have deleted 1 orphaned mirror")
@@ -1273,3 +1274,166 @@ func TestSourceReconciler_updateLastSyncStatus_writesWhenChanged(t *testing.T) {
 	assert.Equal(t, "reconciled:3,errors:0", source.GetAnnotations()[constants.AnnotationSyncStatus])
 	mockClient.AssertCalled(t, "Update", mock.Anything, mock.Anything, mock.Anything)
 }
+
+// countingReader is a client.Reader that counts direct API reads. It stands in
+// for the manager's APIReader so tests can assert the reconcile hot path never
+// bypasses the informer cache.
+type countingReader struct {
+	gets  int
+	lists int
+}
+
+func (c *countingReader) Get(ctx context.Context, key client.ObjectKey, obj client.Object, opts ...client.GetOption) error {
+	c.gets++
+	return errors.NewNotFound(schema.GroupResource{Resource: "secrets"}, key.Name)
+}
+
+func (c *countingReader) List(ctx context.Context, list client.ObjectList, opts ...client.ListOption) error {
+	c.lists++
+	return nil
+}
+
+// newMirrorTestSource builds an unstructured Secret source enabled for mirroring.
+func newMirrorTestSource(t *testing.T) *unstructured.Unstructured {
+	t.Helper()
+	source := &unstructured.Unstructured{}
+	source.SetGroupVersionKind(schema.GroupVersionKind{Version: "v1", Kind: "Secret"})
+	source.SetNamespace("default")
+	source.SetName("test-secret")
+	source.SetLabels(map[string]string{constants.LabelEnabled: "true"})
+	source.SetAnnotations(map[string]string{
+		constants.AnnotationSync:             "true",
+		constants.AnnotationTargetNamespaces: "all",
+	})
+	require.NoError(t, unstructured.SetNestedField(source.Object, "Opaque", "type"))
+	return source
+}
+
+// TestSourceReconciler_reconcileMirror_NoDirectAPIReads is a load regression
+// test: with an up-to-date mirror in the cache, reconcileMirror must complete
+// without a single direct API read. A per-target APIReader.Get here multiplies
+// into (sources x target namespaces) apiserver GETs on every resync and has
+// melted a control-plane node before.
+func TestSourceReconciler_reconcileMirror_NoDirectAPIReads(t *testing.T) {
+	source := newMirrorTestSource(t)
+
+	mirrorObj, err := CreateMirror(source, "target-ns")
+	require.NoError(t, err)
+	mirror, ok := mirrorObj.(*unstructured.Unstructured)
+	require.True(t, ok, "unstructured source must produce an unstructured mirror")
+	mirror.SetResourceVersion("100")
+
+	mockClient := new(MockClient)
+	mockClient.On("Get", mock.Anything, types.NamespacedName{Namespace: "target-ns", Name: "test-secret"}, mock.Anything).
+		Return(nil, mirror)
+
+	reader := &countingReader{}
+	r := &SourceReconciler{
+		Client:    mockClient,
+		APIReader: reader,
+		Config:    &config.Config{VerifySourceFreshness: true},
+		GVK:       source.GroupVersionKind(),
+	}
+
+	require.NoError(t, r.reconcileMirror(context.Background(), source, source, "target-ns"))
+
+	assert.Zero(t, reader.gets, "steady-state mirror reconcile must not GET from the apiserver directly")
+	assert.Zero(t, reader.lists, "steady-state mirror reconcile must not LIST from the apiserver directly")
+	mockClient.AssertNotCalled(t, "Update", mock.Anything, mock.Anything, mock.Anything)
+}
+
+// TestSourceReconciler_getSourceWithFreshness_DefaultNoDirectRead locks the
+// default behaviour: freshness verification is opt-in, so the default config
+// must serve the source straight from the informer cache.
+func TestSourceReconciler_getSourceWithFreshness_DefaultNoDirectRead(t *testing.T) {
+	source := newMirrorTestSource(t)
+
+	mockClient := new(MockClient)
+	mockClient.On("Get", mock.Anything, types.NamespacedName{Namespace: "default", Name: "test-secret"}, mock.Anything).
+		Return(nil, source)
+
+	reader := &countingReader{}
+	r := &SourceReconciler{
+		Client:    mockClient,
+		APIReader: reader,
+		Config:    &config.Config{},
+		GVK:       source.GroupVersionKind(),
+	}
+
+	got, err := r.getSourceWithFreshness(context.Background(), client.ObjectKey{Namespace: "default", Name: "test-secret"}, r.GVK)
+	require.NoError(t, err)
+	assert.Equal(t, "test-secret", got.GetName())
+	assert.Zero(t, reader.gets, "default config must not verify freshness against the apiserver")
+}
+
+// TestMirrorEventPredicate locks the mirror-watch gating: real writes to a
+// mirror enqueue its source for drift repair, while informer resync replays
+// (unchanged resourceVersion), non-mirror objects, and creates stay silent.
+func TestMirrorEventPredicate(t *testing.T) {
+	source := newMirrorTestSource(t)
+	mirrorObj, err := CreateMirror(source, "target-ns")
+	require.NoError(t, err)
+	mirror, ok := mirrorObj.(*unstructured.Unstructured)
+	require.True(t, ok)
+	mirror.SetResourceVersion("100")
+
+	changed := mirror.DeepCopy()
+	changed.SetResourceVersion("101")
+
+	nonMirrorOld := source.DeepCopy()
+	nonMirrorOld.SetResourceVersion("1")
+	nonMirrorNew := source.DeepCopy()
+	nonMirrorNew.SetResourceVersion("2")
+
+	p := mirrorEventPredicate()
+
+	assert.False(t, p.Create(event.CreateEvent{Object: mirror}),
+		"mirror create must not enqueue")
+	assert.True(t, p.Update(event.UpdateEvent{ObjectOld: mirror, ObjectNew: changed}),
+		"real mirror write must enqueue the source for drift repair")
+	assert.False(t, p.Update(event.UpdateEvent{ObjectOld: mirror, ObjectNew: mirror}),
+		"informer resync replay with unchanged resourceVersion must not enqueue")
+	assert.False(t, p.Update(event.UpdateEvent{ObjectOld: nonMirrorOld, ObjectNew: nonMirrorNew}),
+		"non-mirror update must not enqueue")
+	assert.True(t, p.Delete(event.DeleteEvent{Object: mirror}),
+		"mirror delete must enqueue the source for recreation")
+	assert.False(t, p.Delete(event.DeleteEvent{Object: source}),
+		"non-mirror delete must not enqueue")
+}
+
+// TestSourceReconciler_reconcileMirror_RepairsDriftedMirror covers in-place
+// mirror tampering: the mirrored data is edited but the bookkeeping
+// annotations are left intact, so the source-hash check alone would consider
+// the mirror up to date. The reconciler must detect the content divergence
+// and rewrite the mirror — still without any direct API reads.
+func TestSourceReconciler_reconcileMirror_RepairsDriftedMirror(t *testing.T) {
+	source := newMirrorTestSource(t)
+
+	mirrorObj, err := CreateMirror(source, "target-ns")
+	require.NoError(t, err)
+	mirror, ok := mirrorObj.(*unstructured.Unstructured)
+	require.True(t, ok)
+	mirror.SetResourceVersion("100")
+
+	// Tamper with the mirrored content in place; annotations stay intact.
+	require.NoError(t, unstructured.SetNestedStringMap(mirror.Object,
+		map[string]string{"tampered-field": "dGFtcGVyZWQ="}, "data"))
+
+	mockClient := new(MockClient)
+	mockClient.On("Get", mock.Anything, types.NamespacedName{Namespace: "target-ns", Name: "test-secret"}, mock.Anything).
+		Return(nil, mirror)
+	mockClient.On("Update", mock.Anything, mock.Anything, mock.Anything).Return(nil)
+
+	reader := &countingReader{}
+	r := &SourceReconciler{
+		Client:    mockClient,
+		APIReader: reader,
+		Config:    &config.Config{},
+		GVK:       source.GroupVersionKind(),
+	}
+
+	require.NoError(t, r.reconcileMirror(context.Background(), source, source, "target-ns"))
+
+	mockClient.AssertCalled(t, "Update", mock.Anything, mock.Anything, mock.Anything)
+	assert.Zero(t, reader.gets, "drift repair must not read from the apiserver directly")
+}