diff --git a/.github/workflows/actions.yml b/.github/workflows/actions.yml
index 629ee64..a83e59e 100644
--- a/.github/workflows/actions.yml
+++ b/.github/workflows/actions.yml
@@ -19,7 +19,7 @@ permissions: {}
 jobs:
   workflow-lint:
     name: Workflow lint
-    uses: matcra587/github-actions/.github/workflows/workflow-lint.yml@8b104684e72bef79fca78b294accb5f789d3f202
+    uses: matcra587/github-actions/.github/workflows/workflow-lint.yml@67f0de0d0ceebe69895e868207c04e5c66b3bde8
     permissions:
       contents: read
       # security-events: write # Required for zizmor SARIF upload.
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c0df0cc..b325ebb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,18 +13,18 @@ permissions: {}
 jobs:
   go-test:
     name: Go test
-    uses: matcra587/github-actions/.github/workflows/go-test.yml@8b104684e72bef79fca78b294accb5f789d3f202
+    uses: matcra587/github-actions/.github/workflows/go-test.yml@67f0de0d0ceebe69895e868207c04e5c66b3bde8
     permissions:
       contents: read
 
   go-lint:
     name: Go lint
-    uses: matcra587/github-actions/.github/workflows/go-lint.yml@8b104684e72bef79fca78b294accb5f789d3f202
+    uses: matcra587/github-actions/.github/workflows/go-lint.yml@67f0de0d0ceebe69895e868207c04e5c66b3bde8
     permissions:
       contents: read
 
   md-lint:
     name: Markdown lint
-    uses: matcra587/github-actions/.github/workflows/md-lint.yml@8b104684e72bef79fca78b294accb5f789d3f202
+    uses: matcra587/github-actions/.github/workflows/md-lint.yml@67f0de0d0ceebe69895e868207c04e5c66b3bde8
     permissions:
       contents: read
diff --git a/.rumdl.toml b/.rumdl.toml
index 3a88ed1..cf6da96 100644
--- a/.rumdl.toml
+++ b/.rumdl.toml
@@ -10,8 +10,9 @@ respect_gitignore = true
 
 exclude = [
     ".git",
+    ".agents",
+    ".claude",
     ".github",
-    ".claude/rules",
     "build",
     "dist",
     "node_modules",
diff --git a/cmd/slack/main_test.go b/cmd/slack/main_test.go
index 7d74e54..17615ee 100644
--- a/cmd/slack/main_test.go
+++ b/cmd/slack/main_test.go
@@ -15,6 +15,17 @@ import (
 	"github.com/spf13/cobra"
 )
 
+func TestMain(m *testing.M) {
+	clearAmbientAgentEnvironment()
+	os.Exit(m.Run())
+}
+
+func clearAmbientAgentEnvironment() {
+	for _, key := range agent.KnownEnvVars() {
+		_ = os.Unsetenv(key)
+	}
+}
+
 func TestNewRootCommandDefinesPersistentFlags(t *testing.T) {
 	cmd := NewRootCommand()
 	if cmd.Use != "slack" {
diff --git a/internal/agent/detect_test.go b/internal/agent/detect_test.go
index 235fe1c..9c5ee82 100644
--- a/internal/agent/detect_test.go
+++ b/internal/agent/detect_test.go
@@ -1,11 +1,23 @@
 package agent_test
 
 import (
+	"os"
 	"testing"
 
 	"github.com/matcra587/slack-cli/internal/agent"
 )
 
+func TestMain(m *testing.M) {
+	clearAmbientAgentEnvironment()
+	os.Exit(m.Run())
+}
+
+func clearAmbientAgentEnvironment() {
+	for _, key := range agent.KnownEnvVars() {
+		_ = os.Unsetenv(key)
+	}
+}
+
 func TestDetectRecognizesAIAgentEnvironmentList(t *testing.T) {
 	tests := []struct {
 		env  string