7-day edition

Aug 25, 2026 – Aug 31, 2026

The edition exactly as it was published. Nothing here is re-selected on a later reading.

Sep 1, 20264 reads · 398 merged PRs screened

systems design

kubernetes/kubernetes · #141081

Files changed →View PR ↗

Unify code for PodGroups and CompositePodGroups in workloadForestGo · 383 + / 709

Introduces 32 new declarations in pkg/scheduler/framework/types.go.

Adds new systems design rather than adjusting what was there. Tests changed with it, with code of their own.

pkg/scheduler/framework/types.go · 24 files

@@ -1161,73 +1064,129 @@ func findNodeAndParent(curr, parent *PodGroupInfo, name string) (*PodGroupInfo, // It returns a flat slice of all QueuedPodInfo elements that were successfully removed. func (pgqi *QueuedPodGroupInfo) deleteSubtreePods(curr *PodGroupInfo) []*QueuedPodInfo { 	removedPods := make([]*QueuedPodInfo, 0)-	if curr.GetPodGroup() != nil {-		key := fwk.PodGroupKey(curr.Namespace, curr.Name)+	if curr.GetType() == fwk.PodGroupKeyType {+		key := fwk.PodGroupKey(curr.GetNamespace(), curr.GetName()) 		if pods, ok := pgqi.QueuedPodInfos[key]; ok { 			removedPods = append(removedPods, pods...) 			delete(pgqi.QueuedPodInfos, key) 		}+		return removedPods 	} 	for _, child := range curr.Children { 		removedPods = append(removedPods, pgqi.deleteSubtreePods(child)...) 	} 	return removedPods } -func newQueuedPodGroupInfo(pg *schedulingv1beta1.PodGroup) *QueuedPodGroupInfo {-	return &QueuedPodGroupInfo{-		PodGroupInfo: &PodGroupInfo{-			Namespace: pg.Namespace,-			Name:      pg.Name,-			Type:      fwk.PodGroupKeyType,-			PodGroup:  pg,-			Children:  make([]*PodGroupInfo, 0),-		},-		QueuedPodInfos: make(map[fwk.EntityKey][]*QueuedPodInfo),-	}-}--// PodGroupInfo is a wrapper around the PodGroup API object together with a list of pods that belong to the pod group.

language design

denoland/deno · #36722

Files changed →View PR ↗

fix(cli): don't duplicate passthrough args for deno deploy/sandboxRust · 79 + / 5

Introduces 4 new declarations in libs/cli_parser/src/tests_full.rs.

Adds new language design rather than adjusting what was there. Read the linked PR for the surrounding test context.

libs/cli_parser/src/tests_full.rs · 2 files

@@ -9767,6 +9767,79 @@ fn use_env_proxy_flags() {   assert!(r.is_err()); } +#[test]+fn deploy_subcommand() {+  let r = flags_from_vec(svec!["deno", "deploy"]);+  assert_eq!(+    r.unwrap(),+    Flags {+      subcommand: DenoSubcommand::Deploy(DeployFlags { sandbox: false }),+      ..Flags::default()+    }+  );++  // `deploy` is a passthrough subcommand: every arg after it is forwarded+  // verbatim, exactly once. Regression test for a duplication bug where the+  // args were written to `argv` both by `deploy_parse` and by the generic+  // trailing-arg handling, turning `--prod` into `--prod --prod`.+  let r = flags_from_vec(svec!["deno", "deploy", "--prod"]);+  assert_eq!(+    r.unwrap(),+    Flags {+      subcommand: DenoSubcommand::Deploy(DeployFlags { sandbox: false }),+      argv: svec!["--prod"],+      ..Flags::default()+    }+  );++  let r =+    flags_from_vec(svec!["deno", "deploy", "--project=myapp", "--prod", "-y"]);+  assert_eq!(+    r.unwrap(),+    Flags {

systems design

kubernetes/kubernetes · #140447

Files changed →View PR ↗

Rename endpoint_slice_controller_changes to add _total suffixGo · 21 + / 2

Reworks 14 lines of existing logic in staging/src/k8s.io/endpointslice/metrics/metrics.go.

Changes how existing systems design behaves. Tests changed with it, with code of their own.

staging/src/k8s.io/endpointslice/metrics/metrics.go · 6 files

@@ -84,10 +84,25 @@ var ( 	)  	// EndpointSliceChanges tracks the number of changes to Endpoint Slices.+	//+	// Deprecated: use EndpointSliceChangesTotal. The old name lacks the+	// conventional _total suffix required for counters. 	EndpointSliceChanges = metrics.NewCounterVec(+		&metrics.CounterOpts{+			Subsystem:         EndpointSliceSubsystem,+			Name:              "changes",+			Help:              "Number of EndpointSlice changes. Deprecated in favor of endpoint_slice_controller_changes_total.",+			StabilityLevel:    metrics.ALPHA,+			DeprecatedVersion: "1.38.0",+		},+		[]string{"operation"},+	)++	// EndpointSliceChangesTotal tracks the number of changes to Endpoint Slices.+	EndpointSliceChangesTotal = metrics.NewCounterVec( 		&metrics.CounterOpts{ 			Subsystem:      EndpointSliceSubsystem,-			Name:           "changes",+			Name:           "changes_total", 			Help:           "Number of EndpointSlice changes", 			StabilityLevel: metrics.ALPHA, 		},

language design

rust-lang/rust · #162037

Files changed →View PR ↗

LLVM wrapper cleanupsC++ · 8 + / 16

Reworks 18 lines of existing logic in compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp.

Changes how existing language design behaves. Read the linked PR for the surrounding test context.

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp · 3 files

@@ -1334,22 +1332,20 @@ LLVMRustGetDiagInfoKind(LLVMDiagnosticInfoRef DI) {   return toRust((DiagnosticKind)unwrap(DI)->getKind()); } -DEFINE_SIMPLE_CONVERSION_FUNCTIONS(SMDiagnostic, LLVMSMDiagnosticRef)--extern "C" LLVMSMDiagnosticRef LLVMRustGetSMDiagnostic(LLVMDiagnosticInfoRef DI,+extern "C" const SMDiagnostic *LLVMRustGetSMDiagnostic(LLVMDiagnosticInfoRef DI,                                                        uint64_t *Cookie) {   llvm::DiagnosticInfoSrcMgr *SM =       static_cast<llvm::DiagnosticInfoSrcMgr *>(unwrap(DI));   *Cookie = SM->getLocCookie();-  return wrap(&SM->getSMDiag());+  return &SM->getSMDiag(); }  extern "C" bool-LLVMRustUnpackSMDiagnostic(LLVMSMDiagnosticRef DRef, RustStringRef MessageOut,+LLVMRustUnpackSMDiagnostic(const SMDiagnostic *DRef, RustStringRef MessageOut,                            RustStringRef BufferOut,                            LLVMRustDiagnosticLevel *LevelOut, unsigned *LocOut,                            unsigned *RangesOut, size_t *NumRanges) {-  SMDiagnostic &D = *unwrap(DRef);+  const SMDiagnostic &D = *DRef;   auto MessageOS = RawRustStringOstream(MessageOut);   MessageOS << D.getMessage(); 

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