feat: add detection of Codebuff and Freebuff

detection/constants.go

@@ -137,6 +137,8 @@ var SupportedToolsInMentions = []string{
 	"Nemotron",
 	"Salesforce Codegen",
 	"CodeWhisperer",
+	"Codebuff",
+	"Freebuff",
 }
 
 // KnownAgentBranchPrefixes maps branch name prefixes used by AI coding CLIs/agents
@@ -158,6 +160,8 @@ var KnownCoAuthorEmails = map[string]string{
 	"cursoragent@cursor.com": "Cursor",
 	"noreply@aider.chat":     "Aider",
 	"copilot@github.com":     "Copilot",
+	"noreply@codebuff.com":   "Codebuff",
+	"noreply@freebuff.com":   "Freebuff",
 }
 
 // CoAuthorPattern Regex to look for Co-Authored-By trailer with name and email
@@ -172,6 +176,15 @@ var AiderCommitPrefix = "aider:"
 // ClaudeAttributionText
 var ClaudeAttributionText = "Generated with Claude Code"
 
+// CodebuffAttributionText commit message text added by Codebuff
+var CodebuffAttributionText = "Generated with Codebuff"
+
+// FreebuffAttributionText commit message text added by Freebuff
+var FreebuffAttributionText = "Generated with Freebuff"
+
+// FreebuffGeneratedWithPattern matches the Freebuff-style "Generated with: github.com/<user>/<repo>@<sha>" trailer
+var FreebuffGeneratedWithPattern = regexp.MustCompile(`(?im)Generated with:\s+github\.com/[^/]+/[^@\s]*(?:codebuff|freebuff)[^@\s]*@[0-9a-f]+`)
+
 // EntireIOTrailers List of EntireIO related trailers to check for
 var EntireIOTrailers = []string{
 	"Entire-Metadata",

detection/toolmention/toolmention_test.go

@@ -247,6 +247,41 @@ func TestDetect(t *testing.T) {
 			wantScore:      20,
 			wantConfidence: detection.ConfidenceLow,
 		},
+		{
+			name:           "Codebuff mention",
+			input:          detection.Input{Text: "Code in this PR was generated with Codebuff"},
+			wantTools:      []string{"Codebuff"},
+			wantScore:      20,
+			wantConfidence: detection.ConfidenceLow,
+		},
+		{
+			name:           "Freebuff mention",
+			input:          detection.Input{Text: "Written using Freebuff AI agent"},
+			wantTools:      []string{"Freebuff"},
+			wantScore:      20,
+			wantConfidence: detection.ConfidenceLow,
+		},
+		{
+			name:           "Codebuff and Freebuff mention in commit message",
+			input:          detection.Input{CommitMessage: "feat: implemented with Codebuff and Freebuff"},
+			wantTools:      []string{"Codebuff", "Freebuff"},
+			wantScore:      20,
+			wantConfidence: detection.ConfidenceLow,
+		},
+		{
+			name:           "Codebuff and Freebuff case insensitive",
+			input:          detection.Input{Text: "tested with CODEBUFF and freebuff"},
+			wantTools:      []string{"Codebuff", "Freebuff"},
+			wantScore:      20,
+			wantConfidence: detection.ConfidenceLow,
+		},
+		{
+			name:           "Codebuff and Freebuff word boundary prevents partial match",
+			input:          detection.Input{Text: "the codebuffering system and freebuffer cache"},
+			wantTools:      nil,
+			wantScore:      20,
+			wantConfidence: detection.ConfidenceLow,
+		},
 		{
 			name:           "Yi AI",
 			input:          detection.Input{Text: "Test cases generated with Yi AI"},

detection/trailer/trailer.go

@@ -99,6 +99,27 @@ var commitMessagePatterns = []struct {
 		},
 		name: "Replit",
 	},
+	{
+		check: func(msg string) (float64, bool) {
+			if strings.Contains(msg, detection.CodebuffAttributionText) {
+				return detection.TrailerMatchBaseScore, true
+			}
+			return detection.TrailerNotMatchedScore, false
+		},
+		name: "Codebuff",
+	},
+	{
+		check: func(msg string) (float64, bool) {
+			if strings.Contains(msg, detection.FreebuffAttributionText) {
+				return detection.TrailerMatchBaseScore, true
+			}
+			if detection.FreebuffGeneratedWithPattern.MatchString(msg) {
+				return detection.TrailerMatchBaseScore, true
+			}
+			return detection.TrailerNotMatchedScore, false
+		},
+		name: "Freebuff",
+	},
 }
 
 type Detector struct {

detection/trailer/trailer_test.go

@@ -496,6 +496,70 @@ Signed-off-by: some human <test@example.com>
 			wantScore:      nil,
 			wantConfidence: nil,
 		},
+		{
+			name:           "codebuff: Generated with Codebuff in commit message",
+			message:        "fix: update handler\n\n🤖 Generated with Codebuff",
+			wantTools:      []string{"Codebuff"},
+			wantModels:     []string{""},
+			wantScore:      []float64{35},
+			wantConfidence: []detection.Confidence{detection.ConfidenceMedium},
+		},
+		{
+			name:           "codebuff: Generated with Codebuff (no emoji) in commit message",
+			message:        "feat: add feature\n\nGenerated with Codebuff",
+			wantTools:      []string{"Codebuff"},
+			wantModels:     []string{""},
+			wantScore:      []float64{35},
+			wantConfidence: []detection.Confidence{detection.ConfidenceMedium},
+		},
+		{
+			name:           "codebuff: Co-Authored-By trailer with Codebuff email",
+			message:        "fix: update handler\n\nCo-Authored-By: Codebuff <noreply@codebuff.com>",
+			wantTools:      []string{"Codebuff"},
+			wantModels:     []string{""},
+			wantScore:      []float64{75},
+			wantConfidence: []detection.Confidence{detection.ConfidenceHigh},
+		},
+		{
+			name:           "freebuff: Generated with Freebuff in commit message",
+			message:        "fix: update handler\n\n🤖 Generated with Freebuff",
+			wantTools:      []string{"Freebuff"},
+			wantModels:     []string{""},
+			wantScore:      []float64{35},
+			wantConfidence: []detection.Confidence{detection.ConfidenceMedium},
+		},
+		{
+			name:           "freebuff: Generated with github.com URL with freebuff in repo name",
+			message:        "feat: add feature\n\nGenerated with: github.com/LCHEROURI/cook-with-freebuff@08624f0b1b",
+			wantTools:      []string{"Freebuff"},
+			wantModels:     []string{""},
+			wantScore:      []float64{35},
+			wantConfidence: []detection.Confidence{detection.ConfidenceMedium},
+		},
+		{
+			name:           "freebuff: Generated with github.com URL with codebuff in repo name",
+			message:        "feat: add feature\n\nGenerated with: github.com/LCHEROURI/cook-with-codebuff@08624f0b1b",
+			wantTools:      []string{"Freebuff"},
+			wantModels:     []string{""},
+			wantScore:      []float64{35},
+			wantConfidence: []detection.Confidence{detection.ConfidenceMedium},
+		},
+		{
+			name:           "freebuff: Co-Authored-By trailer with Freebuff email",
+			message:        "fix: update handler\n\nCo-Authored-By: Freebuff <noreply@freebuff.com>",
+			wantTools:      []string{"Freebuff"},
+			wantModels:     []string{""},
+			wantScore:      []float64{75},
+			wantConfidence: []detection.Confidence{detection.ConfidenceHigh},
+		},
+		{
+			name:           "freebuff: unrelated repo URL does not match Generated with pattern",
+			message:        "check out https://github.com/example/freebuff for docs",
+			wantTools:      nil,
+			wantModels:     nil,
+			wantScore:      nil,
+			wantConfidence: nil,
+		},
 		{
 			name:           "aider in middle of message not prefix",
 			message:        "fix the aider: integration test",