diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
new file mode 100644
index 0000000..25ae3a2
--- /dev/null
+++ b/.github/workflows/stale.yml
@@ -0,0 +1,25 @@
+name: Mark stale issues and pull requests
+
+# Please refer to https://github.com/actions/stale/blob/master/action.yml
+# to see all config knobs of the stale action.
+
+on:
+  schedule:
+  - cron: "0 0 * * *"
+
+jobs:
+  stale:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/stale@v9
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'A friendly reminder that this issue had no activity for 30 days.'
+        stale-pr-message: 'A friendly reminder that this PR had no activity for 30 days.'
+        stale-issue-label: 'stale-issue'
+        stale-pr-label: 'stale-pr'
+        days-before-stale: 30
+        days-before-close: 365
+        remove-stale-when-updated: true
\ No newline at end of file
diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
new file mode 100644
index 0000000..28757e4
--- /dev/null
+++ b/.github/workflows/validation.yml
@@ -0,0 +1,54 @@
+name: validation
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+      - uses: pre-commit/action@v3.0.1
+
+  DCO-check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: get pr commits
+        id: 'get-pr-commits'
+        uses: tim-actions/get-pr-commits@v1.3.1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: DCO check
+        uses: tim-actions/dco@master
+        with:
+          commits: ${{ steps.get-pr-commits.outputs.commits }}
+
+      - name: check subject line length
+        uses: tim-actions/commit-message-checker-with-regex@v0.3.2
+        with:
+          commits: ${{ steps.get-pr-commits.outputs.commits }}
+          pattern: '^.{0,72}(\n.*)*$'
+          error: 'Subject too long (max 72)'
+
+  codespell:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: codespell-project/actions-codespell@master
+        with:
+          check_filenames: true
+
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+        - uses: actions/checkout@v4
+        - run: make validate
+
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+        - uses: actions/checkout@v4
+        - run: make test
diff --git a/examples/clocksource.rs b/examples/clocksource.rs
index d01f699..45f1fb0 100644
--- a/examples/clocksource.rs
+++ b/examples/clocksource.rs
@@ -8,7 +8,7 @@ fn main() {
     for clock_src in &clocksources {
         println!("name: {}", clock_src.name());
         println!(
-            "avaiable clocksource: {}",
+            "available clocksource: {}",
             clock_src.available_clocksource().join(" "),
         );
         println!("current clocksource: {}", clock_src.current_clocksource());
diff --git a/src/sysfs/class_thermal.rs b/src/sysfs/class_thermal.rs
index a77f18e..7b22a83 100644
--- a/src/sysfs/class_thermal.rs
+++ b/src/sysfs/class_thermal.rs
@@ -12,7 +12,7 @@ enum ThermalZoneInfo {
     Policy,
     Mode,
     Passive,
-    Unkown,
+    Unknown,
 }
 
 impl ThermalZoneInfo {
@@ -23,7 +23,7 @@ impl ThermalZoneInfo {
             "policy" => ThermalZoneInfo::Policy,
             "mode" => ThermalZoneInfo::Mode,
             "passive" => ThermalZoneInfo::Passive,
-            _ => ThermalZoneInfo::Unkown,
+            _ => ThermalZoneInfo::Unknown,
         }
     }
 }
@@ -136,7 +136,7 @@ pub fn collect() -> Vec<ThermalZone> {
                         thermal_device.zone_type = c;
                     }
                 }
-                ThermalZoneInfo::Unkown => {}
+                ThermalZoneInfo::Unknown => {}
             }
         }
 
diff --git a/src/sysfs/clocksource.rs b/src/sysfs/clocksource.rs
index 03a4f8f..05c44da 100644
--- a/src/sysfs/clocksource.rs
+++ b/src/sysfs/clocksource.rs
@@ -31,7 +31,7 @@ impl ClocksourceInfo {
 ///
 /// for clock_src in clocksources {
 ///     println!("name: {}", clock_src.name());
-///     println!("avaiable clocksource: {:?}", clock_src.available_clocksource());
+///     println!("available clocksource: {:?}", clock_src.available_clocksource());
 ///     println!("current clocksource: {}", clock_src.current_clocksource());
 /// }
 ///