diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1552ad196e..ca10989f61 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -71,6 +71,9 @@ jobs:
             echo "SCCACHE_S3_USE_SSL=true"
             echo "AWS_ACCESS_KEY_ID=${CACHE_ACCESS_KEY_ID}"
             echo "AWS_SECRET_ACCESS_KEY=${CACHE_SECRET_ACCESS_KEY}"
+            # Keep the server alive through post-compile test/lint phases so
+            # "Show sccache stats" reflects the real counters.
+            echo "SCCACHE_IDLE_TIMEOUT=0"
           } >> "$GITHUB_ENV"
 
       - name: Rust cache
@@ -378,6 +381,9 @@ jobs:
             echo "SCCACHE_S3_USE_SSL=true"
             echo "AWS_ACCESS_KEY_ID=${CACHE_ACCESS_KEY_ID}"
             echo "AWS_SECRET_ACCESS_KEY=${CACHE_SECRET_ACCESS_KEY}"
+            # Keep the server alive through post-compile test/lint phases so
+            # "Show sccache stats" reflects the real counters.
+            echo "SCCACHE_IDLE_TIMEOUT=0"
           } >> "$GITHUB_ENV"
 
       - name: Rust cache
@@ -455,6 +461,9 @@ jobs:
             echo "SCCACHE_S3_USE_SSL=true"
             echo "AWS_ACCESS_KEY_ID=${CACHE_ACCESS_KEY_ID}"
             echo "AWS_SECRET_ACCESS_KEY=${CACHE_SECRET_ACCESS_KEY}"
+            # Keep the server alive through post-compile test/lint phases so
+            # "Show sccache stats" reflects the real counters.
+            echo "SCCACHE_IDLE_TIMEOUT=0"
           } >> "$GITHUB_ENV"
 
       - name: Rust cache
diff --git a/.github/workflows/mcp-release.yml b/.github/workflows/mcp-release.yml
index aa6fc7da92..3f8f7dfdd1 100644
--- a/.github/workflows/mcp-release.yml
+++ b/.github/workflows/mcp-release.yml
@@ -343,6 +343,9 @@ jobs:
             echo "SCCACHE_S3_USE_SSL=true"
             echo "AWS_ACCESS_KEY_ID=${CACHE_ACCESS_KEY_ID}"
             echo "AWS_SECRET_ACCESS_KEY=${CACHE_SECRET_ACCESS_KEY}"
+            # Keep the server alive through the post-compile packaging tail so
+            # "Show sccache stats" reflects the real counters.
+            echo "SCCACHE_IDLE_TIMEOUT=0"
           } >> "$GITHUB_ENV"
 
       - name: Rust cache
@@ -561,6 +564,9 @@ jobs:
             echo "SCCACHE_S3_USE_SSL=true"
             echo "AWS_ACCESS_KEY_ID=${CACHE_ACCESS_KEY_ID}"
             echo "AWS_SECRET_ACCESS_KEY=${CACHE_SECRET_ACCESS_KEY}"
+            # Keep the server alive through the post-compile packaging tail so
+            # "Show sccache stats" reflects the real counters.
+            echo "SCCACHE_IDLE_TIMEOUT=0"
           } >> "$GITHUB_ENV"
 
       - name: Rust cache
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4397cc56e1..867f740dfd 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -180,6 +180,10 @@ jobs:
             echo "SCCACHE_S3_USE_SSL=true"
             echo "AWS_ACCESS_KEY_ID=${CACHE_ACCESS_KEY_ID}"
             echo "AWS_SECRET_ACCESS_KEY=${CACHE_SECRET_ACCESS_KEY}"
+            # Linking, bundling, and signing run for 30+ minutes after the last
+            # rustc call; the server's 10-minute default idle timeout would
+            # exit first and zero the counters shown by "Show sccache stats".
+            echo "SCCACHE_IDLE_TIMEOUT=0"
           } >> "$GITHUB_ENV"
 
       - name: Compute Rust dependency hash
@@ -322,6 +326,10 @@ jobs:
             echo "SCCACHE_S3_USE_SSL=true"
             echo "AWS_ACCESS_KEY_ID=${CACHE_ACCESS_KEY_ID}"
             echo "AWS_SECRET_ACCESS_KEY=${CACHE_SECRET_ACCESS_KEY}"
+            # Linking, bundling, and signing run for 30+ minutes after the last
+            # rustc call; the server's 10-minute default idle timeout would
+            # exit first and zero the counters shown by "Show sccache stats".
+            echo "SCCACHE_IDLE_TIMEOUT=0"
           } >> "$GITHUB_ENV"
 
       - name: Compute Rust dependency hash