diff --git a/repository/Fossil/FossilRepo.class.st b/repository/Fossil/FossilRepo.class.st
index 23e4887..09540a1 100644
--- a/repository/Fossil/FossilRepo.class.st
+++ b/repository/Fossil/FossilRepo.class.st
@@ -60,6 +60,41 @@ FossilRepo >> commitsByDate [
 	^ result
 ]
 
+{ #category : #'data visualization' }
+FossilRepo >> commitsCalendarFrom: startYear to: endYear colored: colorsPalette [
+	"I"
+
+	| b colors dictionary valuedColors |
+	dictionary := self commitsByDate.
+	colors :=  RTColorPalette sequential colors: 9 scheme: 'Blues'.
+	valuedColors := self commitsByDate collect: [ :v | colors at: v // 2 + 1 ].
+	b := RTCalendarBuilder new.
+	b dateShape rectangle
+		size: 15;
+		color: Color white;
+		borderColor: Color lightGray.
+	b monthShape shape: (b monthShapePath: 15.0).
+	b yearShape
+		composite: [ :comp | 
+			comp
+				add:
+					(RTLabel new
+						text: [ :d | d year ];
+						height: 20).
+			comp add: (RTBox new color: Color transparent) ].
+	b dates: ((Year year: startYear) to: (Year year: endYear)).
+	b dateLayout gapSize: 0.
+	b monthLayout month.
+	b yearLayout horizontalLine.
+	b dateShape
+		if: [ :d | dictionary includesKey: d ]
+		color: [ :d | valuedColors at: d ].
+	b dateInteraction popup.
+	b build.
+	(b view elements select: [ :e | e model isKindOf: Month ]) pushFront.
+	^ b view
+]
+
 { #category : #wiki }
 FossilRepo >> createPage: pageName [
 	^ NeoJSONReader fromString: (self jsonWikiDataFor: 'create/', pageName) 
diff --git a/repository/Fossil/ManifestFossil.class.st b/repository/Fossil/ManifestFossil.class.st
new file mode 100644
index 0000000..c91bf31
--- /dev/null
+++ b/repository/Fossil/ManifestFossil.class.st
@@ -0,0 +1,13 @@
+"
+I store metadata for this package. These meta data are used by other tools such as the SmalllintManifestChecker and the critics Browser
+"
+Class {
+	#name : #ManifestFossil,
+	#superclass : #PackageManifest,
+	#category : #Fossil
+}
+
+{ #category : #'code-critics' }
+ManifestFossil class >> ruleRBBadMessageRuleV1FalsePositive [
+	^ #(#(#(#RGMethodDefinition #(#FossilRepo #commitsCalendarFrom:to:colored: #false)) #'2017-10-12T15:19:50.932072-05:00') )
+]