From 031c4dd2c2ed38b161556f0ff3db8d4673c5a902 Mon Sep 17 00:00:00 2001
From: Kpa-clawbot <259247574+Kpa-clawbot@users.noreply.github.com>
Date: Fri, 27 Mar 2026 21:38:13 -0700
Subject: [PATCH] fix: goRuntime perf fields match frontend expectations
 (goroutines, heapAllocMB, etc.)

Frontend reads goroutines/pauseTotalMs/lastPauseMs/heapAllocMB/heapSysMB/
heapInuseMB/heapIdleMB/numCPU but Go was returning heapMB/sysMB/numGoroutine/
gcPauseMs. All showed as undefined.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 cmd/server/routes.go | 12 ++++++++----
 cmd/server/types.go  | 12 ++++++++----
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/cmd/server/routes.go b/cmd/server/routes.go
index 7443144b..486d8c1e 100644
--- a/cmd/server/routes.go
+++ b/cmd/server/routes.go
@@ -495,11 +495,15 @@ func (s *Server) handlePerf(w http.ResponseWriter, r *http.Request) {
 		GoRuntime: func() *GoRuntimeStats {
 			ms := s.getMemStats()
 			return &GoRuntimeStats{
-				HeapMB:       float64(ms.HeapAlloc) / 1024 / 1024,
-				SysMB:        float64(ms.Sys) / 1024 / 1024,
-				NumGoroutine: runtime.NumGoroutine(),
+				Goroutines:   runtime.NumGoroutine(),
 				NumGC:        ms.NumGC,
-				GCPauseMs:    float64(ms.PauseNs[(ms.NumGC+255)%256]) / 1e6,
+				PauseTotalMs: float64(ms.PauseTotalNs) / 1e6,
+				LastPauseMs:  float64(ms.PauseNs[(ms.NumGC+255)%256]) / 1e6,
+				HeapAllocMB:  float64(ms.HeapAlloc) / 1024 / 1024,
+				HeapSysMB:    float64(ms.HeapSys) / 1024 / 1024,
+				HeapInuseMB:  float64(ms.HeapInuse) / 1024 / 1024,
+				HeapIdleMB:   float64(ms.HeapIdle) / 1024 / 1024,
+				NumCPU:       runtime.NumCPU(),
 			}
 		}(),
 	})
diff --git a/cmd/server/types.go b/cmd/server/types.go
index 0edac5e6..176f21e4 100644
--- a/cmd/server/types.go
+++ b/cmd/server/types.go
@@ -211,11 +211,15 @@ type PerfResponse struct {
 
 // GoRuntimeStats holds Go runtime metrics for the perf endpoint.
 type GoRuntimeStats struct {
-	HeapMB       float64 `json:"heapMB"`
-	SysMB        float64 `json:"sysMB"`
-	NumGoroutine int     `json:"numGoroutine"`
+	Goroutines   int     `json:"goroutines"`
 	NumGC        uint32  `json:"numGC"`
-	GCPauseMs    float64 `json:"gcPauseMs"`
+	PauseTotalMs float64 `json:"pauseTotalMs"`
+	LastPauseMs  float64 `json:"lastPauseMs"`
+	HeapAllocMB  float64 `json:"heapAllocMB"`
+	HeapSysMB    float64 `json:"heapSysMB"`
+	HeapInuseMB  float64 `json:"heapInuseMB"`
+	HeapIdleMB   float64 `json:"heapIdleMB"`
+	NumCPU       int     `json:"numCPU"`
 }
 
 // ─── Packets ───────────────────────────────────────────────────────────────────