diff --git a/.changeset/config.json b/.changeset/config.json
index 071a841844..f9b02d6a44 100644
--- a/.changeset/config.json
+++ b/.changeset/config.json
@@ -1,13 +1,13 @@
 {
-  "$schema": "https://unpkg.com/@changesets/config@1.7.0/schema.json",
-  "changelog": ["@changesets/changelog-github", {"repo": "Khan/perseus"}],
-  "commit": false,
-  "linked": [],
-  "access": "public",
-  "baseBranch": "main",
-  "updateInternalDependencies": "patch",
-  "ignore": [],
-  "___experimentalUnsafeOptions_WILL_CHANGE_IN_PATCH": {
-    "updateInternalDependents": "always"
-  }
+    "$schema": "https://unpkg.com/@changesets/config@1.7.0/schema.json",
+    "changelog": ["@changesets/changelog-github", { "repo": "Khan/perseus" }],
+    "commit": false,
+    "linked": [],
+    "access": "public",
+    "baseBranch": "main",
+    "updateInternalDependencies": "patch",
+    "ignore": [],
+    "___experimentalUnsafeOptions_WILL_CHANGE_IN_PATCH": {
+        "updateInternalDependents": "always"
+    }
 }
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 8111fa6527..93b5a5da3d 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,22 +1,22 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the
 // README at: https://github.com/devcontainers/templates/tree/main/src/typescript-node
 {
-	"name": "Node.js & TypeScript",
-	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/typescript-node:16",
+    "name": "Node.js & TypeScript",
+    // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+    "image": "mcr.microsoft.com/devcontainers/typescript-node:16",
 
-	// Features to add to the dev container. More info: https://containers.dev/features.
-	// "features": {},
+    // Features to add to the dev container. More info: https://containers.dev/features.
+    // "features": {},
 
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	"forwardPorts": [6006],
+    // Use 'forwardPorts' to make a list of ports inside the container available locally.
+    "forwardPorts": [6006],
 
-	// Use 'postCreateCommand' to run commands after the container is created.
-	"postCreateCommand": "yarn install"
+    // Use 'postCreateCommand' to run commands after the container is created.
+    "postCreateCommand": "yarn install"
 
-	// Configure tool-specific properties.
-	// "customizations": {},
+    // Configure tool-specific properties.
+    // "customizations": {},
 
-	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-	// "remoteUser": "root"
+    // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+    // "remoteUser": "root"
 }
diff --git a/.nycrc.json b/.nycrc.json
index 8eaba5538e..3ff9b29ce2 100644
--- a/.nycrc.json
+++ b/.nycrc.json
@@ -6,9 +6,5 @@
         "packages/*/src/**/*.ts",
         "packages/*/src/**/*.tsx"
     ],
-    "exclude": [
-        "**/*.stories.tsx",
-        "**/*.test.ts",
-        "**/*.test.tsx"
-    ]
-}
\ No newline at end of file
+    "exclude": ["**/*.stories.tsx", "**/*.test.ts", "**/*.test.tsx"]
+}
diff --git a/config/cypress/tsconfig.json b/config/cypress/tsconfig.json
index cf44157e20..48e292de4a 100644
--- a/config/cypress/tsconfig.json
+++ b/config/cypress/tsconfig.json
@@ -5,7 +5,7 @@
         "esModuleInterop": true,
         // be explicit about types included
         // to avoid clashing with Jest types
-        "types": ["cypress", "node", "cypress-real-events"]
+        "types": ["cypress", "node", "cypress-real-events"],
     },
-    "include": ["**/*.ts", "**/*.tsx"]
+    "include": ["**/*.ts", "**/*.tsx"],
 }
diff --git a/package.json b/package.json
index 89c34fb8d2..dd74da4bc2 100644
--- a/package.json
+++ b/package.json
@@ -5,11 +5,7 @@
     "repository": "git@github.com:Khan/perseus.git",
     "license": "MIT",
     "private": true,
-    "workspaces": [
-        "dev",
-        "packages/*",
-        "config/build"
-    ],
+    "workspaces": ["dev", "packages/*", "config/build"],
     "engines": {
         "node": ">=20"
     },
diff --git a/packages/kas/package.json b/packages/kas/package.json
index 518138df00..ea5656e26f 100644
--- a/packages/kas/package.json
+++ b/packages/kas/package.json
@@ -18,9 +18,7 @@
     "module": "dist/es/index.js",
     "main": "dist/index.js",
     "source": "src/index.js",
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "gen:parsers": "node src/parser-generator.ts",
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
@@ -36,11 +34,5 @@
     "peerDependencies": {
         "underscore": "1.4.4"
     },
-    "keywords": [
-        "parsing",
-        "equation",
-        "expression",
-        "algebra",
-        "symbolic"
-    ]
+    "keywords": ["parsing", "equation", "expression", "algebra", "symbolic"]
 }
diff --git a/packages/kas/tsconfig-build.json b/packages/kas/tsconfig-build.json
index 5f2f33e952..82b1c134e7 100644
--- a/packages/kas/tsconfig-build.json
+++ b/packages/kas/tsconfig-build.json
@@ -2,9 +2,7 @@
     "extends": "../tsconfig-shared.json",
     "compilerOptions": {
         "outDir": "./dist",
-        "rootDir": "src"
+        "rootDir": "src",
     },
-    "references": [
-        {"path": "../perseus-core/tsconfig-build.json"}
-    ]
+    "references": [{ "path": "../perseus-core/tsconfig-build.json" }],
 }
diff --git a/packages/keypad-context/package.json b/packages/keypad-context/package.json
index a5cfa1b351..9f0413b923 100644
--- a/packages/keypad-context/package.json
+++ b/packages/keypad-context/package.json
@@ -18,9 +18,7 @@
     "module": "dist/es/index.js",
     "main": "dist/index.js",
     "source": "src/index.ts",
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
diff --git a/packages/keypad-context/tsconfig-build.json b/packages/keypad-context/tsconfig-build.json
index e06eddef57..82b1c134e7 100644
--- a/packages/keypad-context/tsconfig-build.json
+++ b/packages/keypad-context/tsconfig-build.json
@@ -4,7 +4,5 @@
         "outDir": "./dist",
         "rootDir": "src",
     },
-    "references": [
-        {"path": "../perseus-core/tsconfig-build.json"}
-    ]
+    "references": [{ "path": "../perseus-core/tsconfig-build.json" }],
 }
diff --git a/packages/kmath/package.json b/packages/kmath/package.json
index 2ae25825cf..6051ca7206 100644
--- a/packages/kmath/package.json
+++ b/packages/kmath/package.json
@@ -17,9 +17,7 @@
     "module": "dist/es/index.js",
     "main": "dist/index.js",
     "source": "src/index.ts",
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
diff --git a/packages/kmath/src/__tests__/vector.test.ts b/packages/kmath/src/__tests__/vector.test.ts
index bda1d9731b..aa8808643b 100644
--- a/packages/kmath/src/__tests__/vector.test.ts
+++ b/packages/kmath/src/__tests__/vector.test.ts
@@ -115,23 +115,17 @@ describe("kvector", function () {
         expect(result).toBe(false);
     });
 
-    it(
-        "vector.collinear should return true on two collinear vectors of " +
-            "the same magnitude but different direction",
-        function () {
-            const result = vector.collinear([3, 3], [-3, -3]);
-            expect(result).toBe(true);
-        },
-    );
-
-    it(
-        "vector.collinear should return true on two collinear vectors of " +
-            "different magnitudes",
-        function () {
-            const result = vector.collinear([2, 1], [6, 3]);
-            expect(result).toBe(true);
-        },
-    );
+    it("vector.collinear should return true on two collinear vectors of " +
+        "the same magnitude but different direction", function () {
+        const result = vector.collinear([3, 3], [-3, -3]);
+        expect(result).toBe(true);
+    });
+
+    it("vector.collinear should return true on two collinear vectors of " +
+        "different magnitudes", function () {
+        const result = vector.collinear([2, 1], [6, 3]);
+        expect(result).toBe(true);
+    });
 
     it("vector.collinear should return false on non-collinear vectors", function () {
         const result = vector.collinear([1, 2], [-1, 2]);
diff --git a/packages/kmath/tsconfig-build.json b/packages/kmath/tsconfig-build.json
index e06eddef57..82b1c134e7 100644
--- a/packages/kmath/tsconfig-build.json
+++ b/packages/kmath/tsconfig-build.json
@@ -4,7 +4,5 @@
         "outDir": "./dist",
         "rootDir": "src",
     },
-    "references": [
-        {"path": "../perseus-core/tsconfig-build.json"}
-    ]
+    "references": [{ "path": "../perseus-core/tsconfig-build.json" }],
 }
diff --git a/packages/math-input/package.json b/packages/math-input/package.json
index 54940a0292..ee5008c43e 100644
--- a/packages/math-input/package.json
+++ b/packages/math-input/package.json
@@ -33,9 +33,7 @@
         },
         "./styles.css": "./dist/index.css"
     },
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {},
     "dependencies": {
         "@khanacademy/keypad-context": "^1.0.3",
diff --git a/packages/math-input/tsconfig-build.json b/packages/math-input/tsconfig-build.json
index f09f2a9f94..343cfad021 100644
--- a/packages/math-input/tsconfig-build.json
+++ b/packages/math-input/tsconfig-build.json
@@ -5,7 +5,7 @@
         "rootDir": "src",
     },
     "references": [
-        {"path": "../perseus-core/tsconfig-build.json"},
-        {"path": "../keypad-context/tsconfig-build.json"},
-    ]
+        { "path": "../perseus-core/tsconfig-build.json" },
+        { "path": "../keypad-context/tsconfig-build.json" },
+    ],
 }
diff --git a/packages/perseus-core/package.json b/packages/perseus-core/package.json
index a691d66e63..baaf740634 100644
--- a/packages/perseus-core/package.json
+++ b/packages/perseus-core/package.json
@@ -18,9 +18,7 @@
     "module": "dist/es/index.js",
     "main": "dist/index.js",
     "source": "src/index.ts",
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
diff --git a/packages/perseus-core/tsconfig-build.json b/packages/perseus-core/tsconfig-build.json
index 950db3d439..bbabd66d20 100644
--- a/packages/perseus-core/tsconfig-build.json
+++ b/packages/perseus-core/tsconfig-build.json
@@ -6,14 +6,12 @@
         "paths": {
             // NOTE(kevinb): We have to repeat this here because TS doesn't do
             // intelligent merge of tsconfig.json files when using `extends`.
-            "@khanacademy/*": [
-                "../*/src"
-            ]
-        }
+            "@khanacademy/*": ["../*/src"],
+        },
     },
     "references": [
         /* Add in-repo pacakge references here, like this:
            {"path": "../path/to/package/tsconfig-build.json"}
         */
-    ]
+    ],
 }
diff --git a/packages/perseus-editor/package.json b/packages/perseus-editor/package.json
index a4a750b30c..fe728f31d4 100644
--- a/packages/perseus-editor/package.json
+++ b/packages/perseus-editor/package.json
@@ -27,9 +27,7 @@
         },
         "./styles.css": "./dist/index.css"
     },
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
diff --git a/packages/perseus-editor/src/__tests__/traversal.test.ts b/packages/perseus-editor/src/__tests__/traversal.test.ts
index ee135cd226..5189e440a1 100644
--- a/packages/perseus-editor/src/__tests__/traversal.test.ts
+++ b/packages/perseus-editor/src/__tests__/traversal.test.ts
@@ -311,9 +311,7 @@ describe("Traversal", () => {
                 content: `${options.content}\n\nnew content!`,
             });
         });
-        expect(newOptions.content).toBe(
-            "[[☃ input-number 1]]\n\nnew content!",
-        );
+        expect(newOptions.content).toBe("[[☃ input-number 1]]\n\nnew content!");
         expect(newOptions.widgets).toEqual(sampleOptions.widgets);
         assertNonMutative();
     });
diff --git a/packages/perseus-editor/src/multirenderer-editor.tsx b/packages/perseus-editor/src/multirenderer-editor.tsx
index dc4cbe9371..bc8c46af14 100644
--- a/packages/perseus-editor/src/multirenderer-editor.tsx
+++ b/packages/perseus-editor/src/multirenderer-editor.tsx
@@ -27,7 +27,6 @@ import type {
     APIOptions,
     ChangeHandler,
     EditorMode,
-
     // Multi-item item types
     Item,
     // ItemTree is used below, the linter is confused.
@@ -37,7 +36,6 @@ import type {
     ContentNode,
     HintNode,
     TagsNode,
-
     // Multi-item shape types
     Shape,
     ArrayShape,
diff --git a/packages/perseus-editor/tsconfig-build.json b/packages/perseus-editor/tsconfig-build.json
index f9d2f0b6ad..cdff10dc32 100644
--- a/packages/perseus-editor/tsconfig-build.json
+++ b/packages/perseus-editor/tsconfig-build.json
@@ -8,15 +8,13 @@
             "hubble": ["../../vendor/hubble/hubble.js"],
             // NOTE(kevinb): We have to repeat this here because TS doesn't do
             // intelligent merge of tsconfig.json files when using `extends`.
-            "@khanacademy/*": [
-                "../*/src"
-            ]
-        }
+            "@khanacademy/*": ["../*/src"],
+        },
     },
     "references": [
-        {"path": "../kas/tsconfig-build.json"},
-        {"path": "../kmath/tsconfig-build.json"},
-        {"path": "../perseus/tsconfig-build.json"},
-        {"path": "../perseus-core/tsconfig-build.json"},
-    ]
+        { "path": "../kas/tsconfig-build.json" },
+        { "path": "../kmath/tsconfig-build.json" },
+        { "path": "../perseus/tsconfig-build.json" },
+        { "path": "../perseus-core/tsconfig-build.json" },
+    ],
 }
diff --git a/packages/perseus-linter/package.json b/packages/perseus-linter/package.json
index 1107b3604a..28a1cd57b2 100644
--- a/packages/perseus-linter/package.json
+++ b/packages/perseus-linter/package.json
@@ -18,9 +18,7 @@
     "module": "dist/es/index.js",
     "main": "dist/index.js",
     "source": "src/index.ts",
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
diff --git a/packages/perseus-linter/src/__tests__/rules.test.ts b/packages/perseus-linter/src/__tests__/rules.test.ts
index fd775fdfd7..b9b7233d73 100644
--- a/packages/perseus-linter/src/__tests__/rules.test.ts
+++ b/packages/perseus-linter/src/__tests__/rules.test.ts
@@ -654,87 +654,67 @@ describe("Individual lint rules tests", () => {
     ]);
 
     test("Rule static-widget-in-question-stem allows static widgets in hints", () => {
-        const problems = testRule(
-            StaticWidgetInQuestionStem,
-            "[[☃ radio 1]]",
-            {
-                contentType: "exercise",
-                stack: ["hint"],
-                widgets: {
-                    "radio 1": {
-                        static: true,
-                    },
+        const problems = testRule(StaticWidgetInQuestionStem, "[[☃ radio 1]]", {
+            contentType: "exercise",
+            stack: ["hint"],
+            widgets: {
+                "radio 1": {
+                    static: true,
                 },
             },
-        );
+        });
 
         expect(problems).toBe(null);
     });
 
     test("Rule static-widget-in-question-stem allows static widgets in articles", () => {
-        const problems = testRule(
-            StaticWidgetInQuestionStem,
-            "[[☃ radio 1]]",
-            {
-                contentType: "article",
-                stack: [],
-                widgets: {
-                    "radio 1": {
-                        static: true,
-                    },
+        const problems = testRule(StaticWidgetInQuestionStem, "[[☃ radio 1]]", {
+            contentType: "article",
+            stack: [],
+            widgets: {
+                "radio 1": {
+                    static: true,
                 },
             },
-        );
+        });
 
         expect(problems).toBe(null);
     });
 
     test("Rule static-widget-in-question-stem allows non-static widgets in question stems", () => {
-        const problems = testRule(
-            StaticWidgetInQuestionStem,
-            "[[☃ radio 1]]",
-            {
-                contentType: "exercise",
-                stack: [],
-                widgets: {
-                    "radio 1": {
-                        static: false,
-                    },
+        const problems = testRule(StaticWidgetInQuestionStem, "[[☃ radio 1]]", {
+            contentType: "exercise",
+            stack: [],
+            widgets: {
+                "radio 1": {
+                    static: false,
                 },
             },
-        );
+        });
 
         expect(problems).toBe(null);
     });
 
     test("Rule static-widget-in-question-stem tolerates widget with no definition", () => {
-        const problems = testRule(
-            StaticWidgetInQuestionStem,
-            "[[☃ radio 1]]",
-            {
-                contentType: "exercise",
-                stack: [],
-                widgets: {},
-            },
-        );
+        const problems = testRule(StaticWidgetInQuestionStem, "[[☃ radio 1]]", {
+            contentType: "exercise",
+            stack: [],
+            widgets: {},
+        });
 
         expect(problems).toBe(null);
     });
 
     test("Rule static-widget-in-question-stem allows warns about static widgets in question stems", () => {
-        const problems = testRule(
-            StaticWidgetInQuestionStem,
-            "[[☃ radio 1]]",
-            {
-                contentType: "exercise",
-                stack: [],
-                widgets: {
-                    "radio 1": {
-                        static: true,
-                    },
+        const problems = testRule(StaticWidgetInQuestionStem, "[[☃ radio 1]]", {
+            contentType: "exercise",
+            stack: [],
+            widgets: {
+                "radio 1": {
+                    static: true,
                 },
             },
-        );
+        });
 
         expect(problems?.length).toBe(1);
         expect(problems?.[0]?.message).toBe(
diff --git a/packages/perseus-linter/src/__tests__/tree-transformer.test.ts b/packages/perseus-linter/src/__tests__/tree-transformer.test.ts
index 0d37cb1c7d..a2c8ad2821 100644
--- a/packages/perseus-linter/src/__tests__/tree-transformer.test.ts
+++ b/packages/perseus-linter/src/__tests__/tree-transformer.test.ts
@@ -62,22 +62,20 @@ describe("PerseusLinter tree transformer", () => {
     }
 
     trees.forEach((tree: any, treenum: number) => {
-        it(
-            "does post-order traversal of each node in the tree " + treenum,
-            () => {
-                const tt = new TreeTransformer(tree);
-                const ids: Array<any> = [];
-
-                tt.traverse((n: any) => {
-                    nodes[n.id] = n; // Remember the nodes by id for later tests
-                    ids.push(n.id);
-                });
+        it("does post-order traversal of each node in the tree " +
+            treenum, () => {
+            const tt = new TreeTransformer(tree);
+            const ids: Array<any> = [];
 
-                // Post-order traversal means we visit the nodes on the way
-                // back up, not on the way down.
-                expect(ids).toEqual(postOrderTraversalOrder);
-            },
-        );
+            tt.traverse((n: any) => {
+                nodes[n.id] = n; // Remember the nodes by id for later tests
+                ids.push(n.id);
+            });
+
+            // Post-order traversal means we visit the nodes on the way
+            // back up, not on the way down.
+            expect(ids).toEqual(postOrderTraversalOrder);
+        });
 
         it("tracks the current node " + treenum, () => {
             new TreeTransformer(tree).traverse((n, state) => {
diff --git a/packages/perseus-linter/tsconfig-build.json b/packages/perseus-linter/tsconfig-build.json
index 02a666d614..ae7fa7e2bf 100644
--- a/packages/perseus-linter/tsconfig-build.json
+++ b/packages/perseus-linter/tsconfig-build.json
@@ -5,7 +5,7 @@
         "rootDir": "src",
     },
     "references": [
-        {"path": "../perseus-core/tsconfig-build.json"},
-        {"path": "../pure-markdown/tsconfig-build.json"},
-    ]
+        { "path": "../perseus-core/tsconfig-build.json" },
+        { "path": "../pure-markdown/tsconfig-build.json" },
+    ],
 }
diff --git a/packages/perseus/package.json b/packages/perseus/package.json
index e2e1a5a39b..730e48ba3d 100644
--- a/packages/perseus/package.json
+++ b/packages/perseus/package.json
@@ -33,9 +33,7 @@
         },
         "./styles.css": "./dist/index.css"
     },
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
diff --git a/packages/perseus/src/multi-items/__stories__/multi-renderer.stories.tsx b/packages/perseus/src/multi-items/__stories__/multi-renderer.stories.tsx
index 04921926dd..3020171974 100644
--- a/packages/perseus/src/multi-items/__stories__/multi-renderer.stories.tsx
+++ b/packages/perseus/src/multi-items/__stories__/multi-renderer.stories.tsx
@@ -46,8 +46,10 @@ export const SingleItem = (args: StoryArgs): React.ReactElement => {
                                 Hints
                             </HeadingSmall>
                             <View style={styles.hints}>
-                                {// @ts-expect-error [FEI-5003] - TS2339 - Property 'firstN' does not exist on type 'readonly ReactNode[]'.
-                                hints?.firstN(2)}
+                                {
+                                    // @ts-expect-error [FEI-5003] - TS2339 - Property 'firstN' does not exist on type 'readonly ReactNode[]'.
+                                    hints?.firstN(2)
+                                }
                             </View>
                         </View>
                     </View>
diff --git a/packages/perseus/src/question-paragraph.tsx b/packages/perseus/src/question-paragraph.tsx
index 6963fd6053..ac30e391c3 100644
--- a/packages/perseus/src/question-paragraph.tsx
+++ b/packages/perseus/src/question-paragraph.tsx
@@ -19,7 +19,7 @@ class QuestionParagraph extends React.Component<Props> {
             <div
                 className={
                     this.props.inline
-                        ? this.props.className ?? undefined
+                        ? (this.props.className ?? undefined)
                         : className
                 }
                 data-perseus-component-index={this.props.translationIndex}
diff --git a/packages/perseus/src/widgets/expression/expression.test.tsx b/packages/perseus/src/widgets/expression/expression.test.tsx
index be8d76b63c..6b674229e2 100644
--- a/packages/perseus/src/widgets/expression/expression.test.tsx
+++ b/packages/perseus/src/widgets/expression/expression.test.tsx
@@ -121,13 +121,10 @@ describe("Expression Widget", function () {
 
         // This isn't necessarily the ideal behavior; it's just what was the
         // easiest to implement
-        it(
-            "should not grade answers that have the wrong variable case, " +
-                "even if the answer has got other errors",
-            async function () {
-                await assertInvalid(userEvent, expressionItem2, "123+X");
-            },
-        );
+        it("should not grade answers that have the wrong variable case, " +
+            "even if the answer has got other errors", async function () {
+            await assertInvalid(userEvent, expressionItem2, "123+X");
+        });
 
         it.each(["123-y", "123-Y"])(
             "should not not grade answers that use the wrong variable",
diff --git a/packages/perseus/src/widgets/graded-group/graded-group-answer-bar.tsx b/packages/perseus/src/widgets/graded-group/graded-group-answer-bar.tsx
index fff2747778..36e0863c94 100644
--- a/packages/perseus/src/widgets/graded-group/graded-group-answer-bar.tsx
+++ b/packages/perseus/src/widgets/graded-group/graded-group-answer-bar.tsx
@@ -12,7 +12,8 @@ import {phoneMargin, negativePhoneMargin} from "../../styles/constants";
 
 import type {APIOptions} from "../../types";
 
-export type ANSWER_BAR_STATES = // Initial state before the question is answerable.  The user must complete
+export type ANSWER_BAR_STATES =
+    // Initial state before the question is answerable.  The user must complete
     // each of the widgets before the answer bar becomes visible.
     // The 'Check' button is active whenever the question is answerable or any
     // of the input widgets have been modified after getting the answer wrong.
diff --git a/packages/perseus/src/widgets/interactive-graphs/mafs-styles.css b/packages/perseus/src/widgets/interactive-graphs/mafs-styles.css
index d03799f068..99e97938b0 100644
--- a/packages/perseus/src/widgets/interactive-graphs/mafs-styles.css
+++ b/packages/perseus/src/widgets/interactive-graphs/mafs-styles.css
@@ -89,9 +89,7 @@
         .movable-point-halo,
         .movable-point-focus-outline
     ) {
-    transition:
-        r 0.15s ease-out,
-        opacity 0.15s ease-out;
+    transition: r 0.15s ease-out, opacity 0.15s ease-out;
 }
 
 .MafsView .movable-point-center {
@@ -113,19 +111,21 @@
 .MafsView .movable-point:hover .movable-point-center {
     r: calc(
         var(--movable-point-hover-expansion) +
-            var(--movable-point-center-radius)
+        var(--movable-point-center-radius)
     );
 }
 
 .MafsView .movable-point:hover .movable-point-ring {
     r: calc(
-        var(--movable-point-hover-expansion) + var(--movable-point-ring-radius)
+        var(--movable-point-hover-expansion) +
+        var(--movable-point-ring-radius)
     );
 }
 
 .MafsView .movable-point:hover .movable-point-halo {
     r: calc(
-        var(--movable-point-hover-expansion) + var(--movable-point-halo-radius)
+        var(--movable-point-hover-expansion) +
+        var(--movable-point-halo-radius)
     );
 }
 
@@ -133,7 +133,7 @@
     visibility: hidden;
     r: calc(
         var(--movable-point-halo-radius) +
-            var(--movable-point-focus-ring-offset)
+        var(--movable-point-focus-ring-offset)
     );
     stroke-width: 2px;
     fill: none;
@@ -142,8 +142,9 @@
 
 .MafsView .movable-point:hover .movable-point-focus-outline {
     r: calc(
-        var(--movable-point-hover-expansion) + var(--movable-point-halo-radius) +
-            var(--movable-point-focus-ring-offset)
+        var(--movable-point-hover-expansion) +
+        var(--movable-point-halo-radius) +
+        var(--movable-point-focus-ring-offset)
     );
 }
 
diff --git a/packages/perseus/tsconfig-build.json b/packages/perseus/tsconfig-build.json
index a63f8be47c..896203f67b 100644
--- a/packages/perseus/tsconfig-build.json
+++ b/packages/perseus/tsconfig-build.json
@@ -8,19 +8,17 @@
             "raphael": ["../../vendor/raphael/raphael.js"],
             // NOTE(kevinb): We have to repeat this here because TS doesn't do
             // intelligent merge of tsconfig.json files when using `extends`.
-            "@khanacademy/*": [
-                "../*/src"
-            ]
-        }
+            "@khanacademy/*": ["../*/src"],
+        },
     },
     "references": [
-        {"path": "../kas/tsconfig-build.json"},
-        {"path": "../kmath/tsconfig-build.json"},
-        {"path": "../math-input/tsconfig-build.json"},
-        {"path": "../perseus-core/tsconfig-build.json"},
-        {"path": "../keypad-context/tsconfig-build.json"},
-        {"path": "../perseus-linter/tsconfig-build.json"},
-        {"path": "../pure-markdown/tsconfig-build.json"},
-        {"path": "../simple-markdown/tsconfig-build.json"},
-    ]
+        { "path": "../kas/tsconfig-build.json" },
+        { "path": "../kmath/tsconfig-build.json" },
+        { "path": "../math-input/tsconfig-build.json" },
+        { "path": "../perseus-core/tsconfig-build.json" },
+        { "path": "../keypad-context/tsconfig-build.json" },
+        { "path": "../perseus-linter/tsconfig-build.json" },
+        { "path": "../pure-markdown/tsconfig-build.json" },
+        { "path": "../simple-markdown/tsconfig-build.json" },
+    ],
 }
diff --git a/packages/pure-markdown/package.json b/packages/pure-markdown/package.json
index 345c2ae873..8043c9ea3a 100644
--- a/packages/pure-markdown/package.json
+++ b/packages/pure-markdown/package.json
@@ -18,9 +18,7 @@
     "module": "dist/es/index.js",
     "main": "dist/index.js",
     "source": "src/index.ts",
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
diff --git a/packages/pure-markdown/tsconfig-build.json b/packages/pure-markdown/tsconfig-build.json
index 69832770b7..610bb90902 100644
--- a/packages/pure-markdown/tsconfig-build.json
+++ b/packages/pure-markdown/tsconfig-build.json
@@ -5,7 +5,7 @@
         "rootDir": "src",
     },
     "references": [
-        {"path": "../perseus-core/tsconfig-build.json"},
-        {"path": "../simple-markdown/tsconfig-build.json"},
-    ]
+        { "path": "../perseus-core/tsconfig-build.json" },
+        { "path": "../simple-markdown/tsconfig-build.json" },
+    ],
 }
diff --git a/packages/simple-markdown/package.json b/packages/simple-markdown/package.json
index a095c2a00f..8e7a53eaee 100644
--- a/packages/simple-markdown/package.json
+++ b/packages/simple-markdown/package.json
@@ -18,9 +18,7 @@
     "module": "dist/es/index.js",
     "main": "dist/index.js",
     "source": "src/index.ts",
-    "files": [
-        "dist"
-    ],
+    "files": ["dist"],
     "scripts": {
         "test": "bash -c 'yarn --silent --cwd \"../..\" test ${@:0} $($([[ ${@: -1} = -* ]] || [[ ${@: -1} = bash ]]) && echo $PWD)'"
     },
@@ -34,7 +32,5 @@
         "react": "^18.2.0",
         "react-dom": "^18.2.0"
     },
-    "keywords": [
-        "markdown"
-    ]
+    "keywords": ["markdown"]
 }
diff --git a/packages/simple-markdown/tsconfig-build.json b/packages/simple-markdown/tsconfig-build.json
index f0afa3b7b5..82b1c134e7 100644
--- a/packages/simple-markdown/tsconfig-build.json
+++ b/packages/simple-markdown/tsconfig-build.json
@@ -1,10 +1,8 @@
 {
-  "extends": "../tsconfig-shared.json",
-  "compilerOptions": {
-      "outDir": "./dist",
-      "rootDir": "src",
-  },
-  "references": [
-    {"path": "../perseus-core/tsconfig-build.json"},
-  ]
+    "extends": "../tsconfig-shared.json",
+    "compilerOptions": {
+        "outDir": "./dist",
+        "rootDir": "src",
+    },
+    "references": [{ "path": "../perseus-core/tsconfig-build.json" }],
 }
diff --git a/packages/tsconfig-shared.json b/packages/tsconfig-shared.json
index 7b37b07c9e..eca6c1716d 100644
--- a/packages/tsconfig-shared.json
+++ b/packages/tsconfig-shared.json
@@ -10,7 +10,7 @@
         "**/__testutils__/**",
         "**/*.stories.*",
         "**/__stories__/**",
-        "**/*.cypress.*"
+        "**/*.cypress.*",
     ],
     "extends": "../tsconfig-common.json",
     "compilerOptions": {
@@ -23,9 +23,7 @@
         "emitDeclarationOnly": true,
 
         "paths": {
-            "@khanacademy/*": [
-                "./*/src"
-            ]
+            "@khanacademy/*": ["./*/src"],
         },
     },
 }
diff --git a/static/lato.css b/static/lato.css
index 648ef82d1f..cadea2e540 100644
--- a/static/lato.css
+++ b/static/lato.css
@@ -5,9 +5,7 @@
     font-family: "Lato";
     font-style: italic;
     font-weight: 400;
-    src:
-        local("Lato Italic"),
-        local("Lato-Italic"),
+    src: local("Lato Italic"), local("Lato-Italic"),
         url(fonts/lato/Lato-Italic.woff2) format("woff2");
     unicode-range: U+0400-04FF, U+0500-052F, U+2DE0-2DFF, U+A640-A69F,
         U+1D00-1D7F;
@@ -17,9 +15,7 @@
     font-family: "Lato";
     font-style: normal;
     font-weight: 400;
-    src:
-        local("Lato Regular"),
-        local("Lato-Regular"),
+    src: local("Lato Regular"), local("Lato-Regular"),
         url(fonts/lato/Lato-Regular.woff2) format("woff2");
     unicode-range: U+0400-04FF, U+0500-052F, U+2DE0-2DFF, U+A640-A69F,
         U+1D00-1D7F;
@@ -29,10 +25,8 @@
     font-family: "Lato";
     font-style: normal;
     font-weight: 700;
-    src:
-        local("Lato Bold"),
-        local("Lato-Bold"),
-        url(fonts/lato/Lato-Bold.woff2) format("woff2");
+    src: local("Lato Bold"), local("Lato-Bold"), url(fonts/lato/Lato-Bold.woff2)
+        format("woff2");
     unicode-range: U+0400-04FF, U+0500-052F, U+2DE0-2DFF, U+A640-A69F,
         U+1D00-1D7F;
 }
@@ -41,9 +35,7 @@
     font-family: "Lato";
     font-style: normal;
     font-weight: 900;
-    src:
-        local("Lato Black"),
-        local("Lato-Black"),
+    src: local("Lato Black"), local("Lato-Black"),
         url(fonts/lato/Lato-Black.woff2) format("woff2");
     unicode-range: U+0400-04FF, U+0500-052F, U+2DE0-2DFF, U+A640-A69F,
         U+1D00-1D7F;
@@ -54,9 +46,7 @@
     font-family: "Lato";
     font-style: italic;
     font-weight: 400;
-    src:
-        local("Lato Italic"),
-        local("Lato-Italic"),
+    src: local("Lato Italic"), local("Lato-Italic"),
         url(fonts/lato/LatoLatin-Italic.woff2) format("woff2");
 }
 
@@ -64,9 +54,7 @@
     font-family: "Lato";
     font-style: normal;
     font-weight: 400;
-    src:
-        local("Lato Regular"),
-        local("Lato-Regular"),
+    src: local("Lato Regular"), local("Lato-Regular"),
         url(fonts/lato/LatoLatin-Regular.woff2) format("woff2");
 }
 
@@ -74,9 +62,7 @@
     font-family: "Lato";
     font-style: normal;
     font-weight: 700;
-    src:
-        local("Lato Bold"),
-        local("Lato-Bold"),
+    src: local("Lato Bold"), local("Lato-Bold"),
         url(fonts/lato/LatoLatin-Bold.woff2) format("woff2");
 }
 
@@ -84,9 +70,7 @@
     font-family: "Lato";
     font-style: normal;
     font-weight: 900;
-    src:
-        local("Lato Black"),
-        local("Lato-Black"),
+    src: local("Lato Black"), local("Lato-Black"),
         url(fonts/lato/LatoLatin-Black.woff2) format("woff2");
 }
 
@@ -95,9 +79,7 @@
     font-family: "Lato";
     font-style: italic;
     font-weight: 400;
-    src:
-        local("Lato Italic"),
-        local("Lato-Italic"),
+    src: local("Lato Italic"), local("Lato-Italic"),
         url(fonts/lato/LatoLatinExtended-Italic.woff2) format("woff2");
     unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB,
         U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
diff --git a/tsconfig-build.json b/tsconfig-build.json
index 071746b829..cf267eb7ee 100644
--- a/tsconfig-build.json
+++ b/tsconfig-build.json
@@ -5,15 +5,15 @@
     // in each package directory.
     "files": [],
     "references": [
-        {"path": "./packages/kas/tsconfig-build.json"},
-        {"path": "./packages/kmath/tsconfig-build.json"},
-        {"path": "./packages/math-input/tsconfig-build.json"},
-        {"path": "./packages/keypad-context/tsconfig-build.json"},
-        {"path": "./packages/perseus/tsconfig-build.json"},
-        {"path": "./packages/perseus-core/tsconfig-build.json"},
-        {"path": "./packages/perseus-editor/tsconfig-build.json"},
-        {"path": "./packages/perseus-linter/tsconfig-build.json"},
-        {"path": "./packages/pure-markdown/tsconfig-build.json"},
-        {"path": "./packages/simple-markdown/tsconfig-build.json"},
-    ]
+        { "path": "./packages/kas/tsconfig-build.json" },
+        { "path": "./packages/kmath/tsconfig-build.json" },
+        { "path": "./packages/math-input/tsconfig-build.json" },
+        { "path": "./packages/keypad-context/tsconfig-build.json" },
+        { "path": "./packages/perseus/tsconfig-build.json" },
+        { "path": "./packages/perseus-core/tsconfig-build.json" },
+        { "path": "./packages/perseus-editor/tsconfig-build.json" },
+        { "path": "./packages/perseus-linter/tsconfig-build.json" },
+        { "path": "./packages/pure-markdown/tsconfig-build.json" },
+        { "path": "./packages/simple-markdown/tsconfig-build.json" },
+    ],
 }
diff --git a/tsconfig-common.json b/tsconfig-common.json
index b0daa4f06a..9c9cdd40ef 100644
--- a/tsconfig-common.json
+++ b/tsconfig-common.json
@@ -24,5 +24,5 @@
         /* Completeness */
         "skipDefaultLibCheck": true, // it's safe to assume that built-in .d.ts files are correct
         "skipLibCheck": true, // there are conflicts between some of the globals in various third-party packages
-    }
+    },
 }
diff --git a/tsconfig.json b/tsconfig.json
index 4cf34c2857..ff945fc61f 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -8,7 +8,7 @@
         "cypress.config.ts",
         "config/cypress/**",
         "**/*.cypress.ts",
-        "**/*.cypress.tsx"
+        "**/*.cypress.tsx",
     ],
     "extends": "./tsconfig-common.json",
     "compilerOptions": {
@@ -21,17 +21,19 @@
             "@khanacademy/kmath": ["./packages/kmath/src"],
             "@khanacademy/keypad-context": ["./packages/keypad-context/src"],
             "@khanacademy/math-input": ["./packages/math-input/src"],
-            "@khanacademy/math-input/strings": ["./packages/math-input/src/strings"],
+            "@khanacademy/math-input/strings": [
+                "./packages/math-input/src/strings",
+            ],
             "@khanacademy/perseus": ["./packages/perseus/src"],
             "@khanacademy/perseus/strings": ["./packages/perseus/src/strings"],
             "@khanacademy/perseus-*": ["./packages/perseus-*/src"],
             "@khanacademy/pure-markdown": ["./packages/pure-markdown/src"],
-            "@khanacademy/simple-markdown": ["./packages/simple-markdown/src"]
+            "@khanacademy/simple-markdown": ["./packages/simple-markdown/src"],
         },
 
         /* Preference */
         // If this is disabled, TS will sometimes just delete dead code, which
         // can be confusing!
-        "allowUnreachableCode": true
-    }
+        "allowUnreachableCode": true,
+    },
 }