diff --git a/packages/core/src/pattern-config.mjs b/packages/core/src/pattern-config.mjs
index 8b87c0450d8..7bac6c6fd2b 100644
--- a/packages/core/src/pattern-config.mjs
+++ b/packages/core/src/pattern-config.mjs
@@ -1,4 +1,4 @@
-import { __addNonEnumProp, capitalize } from './utils.mjs'
+import { __addNonEnumProp } from './utils.mjs'
 
 export const hidePresets = {
   HIDE_ALL: {
@@ -339,34 +339,56 @@ PatternConfig.prototype.__addPartPlugins = function (part) {
 
 // the two types of dependencies
 const depTypes = ['from', 'after']
+// the two lists of special istructions
 const exceptionTypes = ['never', 'always']
+/**
+ * Resolve the hiding configuration of this part
+ * This method does not hide dependencies,
+ * but it does hide or unhide parts listed in `never` and `always` in the config
+ * according to this part's options priority
+ * @param   {Part} part the part whose config should be resolved
+ * @private
+ */
 PatternConfig.prototype.__resolvePartHiding = function (part) {
+  // get the config
   let hide = part.hide
+  // if it's a string, get the preset by that name
   if (typeof hide === 'string') hide = hidePresets[hide]
+  // no config, nothing to do
   if (!hide) return
 
   // get the part's option priority
   const partDistance = this.__mutated.partDistance?.[part.name]
+  // get the current distances that dictate if this part should never or always be hidden
   const neverDistance = this.__hiding.never[part.name] || Infinity
   const alwaysDistance = this.__hiding.always[part.name] || Infinity
 
+  // if the part is configured to hide, and it takes priority over other instructions, hide it
   if (hide.self && (neverDistance > partDistance || alwaysDistance <= neverDistance))
     this.partHide[part.name] = true
 
+  // for each exception list, starting with never
   exceptionTypes.forEach((e, i) => {
+    // if there are instructions for this list
     if (hide[e]) {
+      // each part in the list
       hide[e].forEach((p) => {
+        // get the current distance of a call to never or always hide this part
         const otherDistance = this.__hiding[exceptionTypes[Math.abs(i - 1)]][p] || Infinity
 
+        // if a current command is less important than this one,
         if (otherDistance > partDistance) {
           const thisDistance = this.__hiding[e][p] || Infinity
+          // record the new priority
           this.__hiding[e][p] = Math.min(thisDistance, partDistance)
+          // hide or show the part
           this.partHide[p] = i == 1
         }
       })
     }
   })
 
+  // add the dependency hiding instructions if they haven't already been set
   depTypes.concat('inherited').forEach((k) => {
     if (this.__hiding[k][part.name] === undefined) this.__hiding[k][part.name] = hide[k]
   })
@@ -446,16 +468,22 @@ PatternConfig.prototype.__addDependency = function (dependencyList, partName, de
  * @private
  */
 PatternConfig.prototype.__handlePartDependencyOfType = function (part, depName, depType) {
+  // if this dependency should be hidden based on dependency type, and doesn't already have an instruction, hide it
   if (this.__hiding[depType][part.name] === true && this.partHide[depName] === undefined) {
     this.partHide[depName] = true
   }
 
+  // get the part's inherited hide instructions
   const hideInherited = this.__hiding.inherited[part.name]
+  // for from dependencies
   if (depType === 'from') {
+    // inject the dependency into the part
     this.inject[part.name] = depName
+    // hide after dependencies if inherited dependencies should hide
     this.__hiding.after[depName] = hideInherited
   }
 
+  // for all depependency types, from and inherited are dictated by the dependendent part's policy
   this.__hiding.from[depName] = hideInherited
   this.__hiding.inherited[depName] = hideInherited
 }
diff --git a/packages/core/tests/pattern-part-hiding.test.mjs b/packages/core/tests/pattern-part-hiding.test.mjs
index 9590f0d62b1..7ed763a3cda 100644
--- a/packages/core/tests/pattern-part-hiding.test.mjs
+++ b/packages/core/tests/pattern-part-hiding.test.mjs
@@ -6,7 +6,6 @@ function hidePartMatcher(partName) {
   const isHidden = this._obj.__isPartHidden(partName)
   if (!this._obj.config.parts[partName]) {
     throw new chai.AssertionError(`expected part \`${partName}\` to exist in pattern`)
-    this.fail()
   }
   this.assert(
     isHidden,
@@ -19,7 +18,6 @@ function hidePartsMatcher(...partNames) {
   const hiddens = partNames.map((n) => {
     if (!this._obj.config.parts[n]) {
       throw new chai.AssertionError(`expected part \`${n}\` to exist in pattern`)
-      this.fail()
     }
     return this._obj.__isPartHidden(n)
   })