diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index 1bb57c3e..b4239dd9 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -6,9 +6,14 @@ on:
   pull_request:
     branches: ["**"]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   doc_verify:
     runs-on: ubuntu-latest
+    timeout-minutes: 30
     steps:
       - uses: actions/checkout@v5
 
@@ -31,6 +36,7 @@ jobs:
 
   remote_install:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os:
@@ -67,6 +73,7 @@ jobs:
 
   local_install:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os:
@@ -118,6 +125,7 @@ jobs:
 
   local_install_full:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os:
diff --git a/.github/workflows/fmt.yml b/.github/workflows/fmt.yml
index e946028f..3ef78aff 100644
--- a/.github/workflows/fmt.yml
+++ b/.github/workflows/fmt.yml
@@ -6,9 +6,14 @@ on:
   pull_request:
     branches: ["**"]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   fmt:
     runs-on: ubuntu-latest
+    timeout-minutes: 30
     steps:
       - uses: actions/checkout@v5
 
diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 17614d34..7fb0ebed 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -9,9 +9,14 @@ on:
   pull_request:
     branches: ["**"]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os:
diff --git a/.github/workflows/llgo.yml b/.github/workflows/llgo.yml
index bd6d4f70..17d3c6ce 100644
--- a/.github/workflows/llgo.yml
+++ b/.github/workflows/llgo.yml
@@ -9,9 +9,14 @@ on:
   pull_request:
     branches: ["**"]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   download-model:
     runs-on: ubuntu-latest
+    timeout-minutes: 30
     steps:
       - name: Download model file
         run: |
@@ -28,6 +33,7 @@ jobs:
   llgo:
     needs: download-model
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os:
@@ -133,6 +139,7 @@ jobs:
 
   test:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os:
@@ -176,6 +183,7 @@ jobs:
 
   hello:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os: [ubuntu-24.04, macos-latest]
@@ -234,6 +242,7 @@ jobs:
 
   cross-compile:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os: [macos-latest]
diff --git a/.github/workflows/release-build.yml b/.github/workflows/release-build.yml
index 289d8767..eda49aca 100644
--- a/.github/workflows/release-build.yml
+++ b/.github/workflows/release-build.yml
@@ -5,9 +5,14 @@ on:
     tags:
       - "*"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   populate-darwin-sysroot:
     runs-on: macos-latest
+    timeout-minutes: 30
     steps:
       - name: Check out code
         uses: actions/checkout@v5
@@ -24,6 +29,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     needs: populate-darwin-sysroot
+    timeout-minutes: 30
     steps:
       - name: Check out code
         uses: actions/checkout@v5
diff --git a/.github/workflows/targets.yml b/.github/workflows/targets.yml
index c704a675..c11c58e8 100644
--- a/.github/workflows/targets.yml
+++ b/.github/workflows/targets.yml
@@ -7,9 +7,14 @@ on:
   pull_request:
     branches: ["**"]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   llgo:
     continue-on-error: true
+    timeout-minutes: 30
     strategy:
       matrix:
         os: