diff --git a/src/playerprogress.ts b/src/playerprogress.ts
index a73f4cf..a486d2d 100644
--- a/src/playerprogress.ts
+++ b/src/playerprogress.ts
@@ -4,8 +4,8 @@ import { getThralls, ItemStage, LifeStage, Thrall } from "./thralls.ts";
 import { SaveFileV1, mustBeSaveFileV1 } from "./saveformat.ts";
 
 interface NewRoundConfig {
-  asSuccessor: SuccessorOption,
-  withWish: Wish | null,
+  asSuccessor: SuccessorOption;
+  withWish: Wish | null;
 }
 
 export class PlayerProgress {
@@ -28,7 +28,7 @@ export class PlayerProgress {
 
   constructor(args: NewRoundConfig | SaveFileV1) {
     if ("asSuccesor" in args) {
-    //asSuccessor: SuccessorOption, withWish: Wish | null) {
+      //asSuccessor: SuccessorOption, withWish: Wish | null) {
       const config = args as NewRoundConfig;
       const asSuccessor = config.asSuccessor;
       this.#name = asSuccessor.name;
@@ -59,23 +59,27 @@ export class PlayerProgress {
         INT: file.stats.int,
         CHA: file.stats.cha,
         PSI: file.stats.psi,
-      }
+      };
       this.#talents = {
         AGI: file.talents.agi,
         INT: file.talents.int,
         CHA: file.talents.cha,
         PSI: file.talents.psi,
-      }
-      this.#isInPenance = file.isInPenance,
-      this.#wish = file.wishId >= 0 ? {id: file.wishId} : null;
+      };
+      (this.#isInPenance = file.isInPenance),
+        (this.#wish = file.wishId >= 0 ? { id: file.wishId } : null);
       this.#exp = file.exp;
       this.#blood = file.blood;
       this.#itemsPurloined = file.itemsPurloined;
       this.#skillsLearned = file.skillsLearned;
-      this.#untrimmedSkillsAvailable = file.untrimmedSkillsAvailableIds.map((id) => {return {id: id}});
+      this.#untrimmedSkillsAvailable = file.untrimmedSkillsAvailableIds.map(
+        (id) => {
+          return { id: id };
+        },
+      );
       this.#thrallsUnlocked = file.thrallsUnlocked;
       this.#thrallDamage = {};
-      for(let i = 0; i < file.thrallDamage.length; ++i) {
+      for (let i = 0; i < file.thrallDamage.length; ++i) {
         this.#thrallDamage[i] = file.thrallDamage[i];
       }
       this.#thrallsObtainedItem = file.thrallsObtainedItem;
@@ -252,7 +256,7 @@ export class PlayerProgress {
     return this.#untrimmedSkillsAvailable.map((s) => s.id);
   }
 
-  getLearnedSkills() : Skill[] {
+  getLearnedSkills(): Skill[] {
     let learnedSkills = [];
     for (let s of this.#skillsLearned.values()) {
       learnedSkills.push({ id: s });
@@ -260,7 +264,7 @@ export class PlayerProgress {
     return learnedSkills;
   }
 
-  getRawLearnedSkills() : number[] {
+  getRawLearnedSkills(): number[] {
     return [...this.#skillsLearned];
   }
 
@@ -283,7 +287,7 @@ export class PlayerProgress {
     return this.#thrallsUnlocked.indexOf(thrall.id) != -1;
   }
 
-  getUnlockedThrallIds() : number[] {
+  getUnlockedThrallIds(): number[] {
     return [...this.#thrallsUnlocked];
   }
 
@@ -328,7 +332,7 @@ export class PlayerProgress {
     this.#thrallsObtainedItem.push(thrall.id);
   }
 
-  getThrallObtainedItemIds() : number[] {
+  getThrallObtainedItemIds(): number[] {
     return [...this.#thrallsObtainedItem];
   }
 
@@ -339,7 +343,7 @@ export class PlayerProgress {
     this.#thrallsDeliveredItem.push(thrall.id);
   }
 
-  getThrallDeliveredItemIds() : number[] {
+  getThrallDeliveredItemIds(): number[] {
     return [...this.#thrallsDeliveredItem];
   }
 
@@ -374,7 +378,7 @@ export function initPlayerProgress(
   asSuccessor: SuccessorOption,
   withWish: Wish | null,
 ) {
-  active = new PlayerProgress({asSuccessor:asSuccessor, withWish:withWish});
+  active = new PlayerProgress({ asSuccessor: asSuccessor, withWish: withWish });
 }
 
 export function getPlayerProgress(): PlayerProgress {
diff --git a/src/save.ts b/src/save.ts
index 68d7db7..c147759 100644
--- a/src/save.ts
+++ b/src/save.ts
@@ -1,11 +1,11 @@
-import { getPlayerProgress } from "./playerprogress"
+import { getPlayerProgress } from "./playerprogress";
 import { getStateManager } from "./statemanager";
 import { getThralls } from "./thralls";
-import {SaveFileV1, StatCounterV1} from "./saveformat";
+import { SaveFileV1, StatCounterV1 } from "./saveformat";
 
 export interface SaveFile {
-    version: string;
-    revision: number;
+  version: string;
+  revision: number;
 }
 
 type SaveSlot = "FLEDGLING_SLOT_1" | "FLEDGLING_SLOT_2";
@@ -13,279 +13,285 @@ type SaveSlot = "FLEDGLING_SLOT_1" | "FLEDGLING_SLOT_2";
 /// Checks whether obj is a valid save file, as far as we can tell, and returns
 /// it unchanged if it is, or throws an error if it's not valid.
 export function mustBeSaveFileV1(obj: unknown): SaveFileV1 {
-    if (obj === undefined || obj === null) {
-        throw new Error("nonexistent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`not an object; was ${typeof(obj)}`);
-    }
+  if (obj === undefined || obj === null) {
+    throw new Error("nonexistent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`not an object; was ${typeof obj}`);
+  }
 
-    if (!("version" in obj)) {
-        throw new Error("no magic number");
-    }
-    if (obj.version !== "fledgling_save_v1") {
-        throw new Error(`bad magic number: ${obj.version}`);
-    }
+  if (!("version" in obj)) {
+    throw new Error("no magic number");
+  }
+  if (obj.version !== "fledgling_save_v1") {
+    throw new Error(`bad magic number: ${obj.version}`);
+  }
 
+  return {
+    version: "fledgling_save_v1",
+    revision: mustGetNumber(obj, "revision"),
+    turn: mustGetNumber(obj, "turn"),
+    name: mustGetString(obj, "name"),
+    thrallTemplateId: mustGetNumber(obj, "thrallTemplateId"),
+    nImprovements: mustGetNumber(obj, "nImprovements"),
+    stats: mustGetStatCounterV1(obj, "stats"),
+    talents: mustGetStatCounterV1(obj, "talents"),
+    isInPenance: mustGetBoolean(obj, "isInPenance"),
+    wishId: mustGetNumber(obj, "wishId"),
+    exp: mustGetNumber(obj, "exp"),
+    blood: mustGetNumber(obj, "blood"),
+    itemsPurloined: mustGetNumber(obj, "itemsPurloined"),
+    skillsLearned: mustGetNumberArray(obj, "skillsLearned"),
+    untrimmedSkillsAvailableIds: mustGetNumberArray(
+      obj,
+      "untrimmedSkillsAvailableIds",
+    ),
+    thrallsUnlocked: mustGetNumberArray(obj, "thrallsUnlocked"),
+    thrallDamage: mustGetNumberArray(obj, "thrallDamage"),
+    thrallsObtainedItem: mustGetNumberArray(obj, "thrallsObtainedItem"),
+    thrallsDeliveredItem: mustGetNumberArray(obj, "thrallsDeliveredItem"),
+  };
+}
+
+function mustGetNumber(obj: object, key: string): number {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "number") {
+    throw new Error(`not a number: ${key}: ${val}`);
+  }
+  return val;
+}
+
+function mustGetString(obj: object, key: string): string {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "string") {
+    throw new Error(`not a string: ${key}: ${val}`);
+  }
+  return val;
+}
+
+function mustGetStatCounterV1(obj: object, key: string): StatCounterV1 {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "object") {
+    throw new Error(`not an object: ${key}: ${val}`);
+  }
+
+  try {
     return {
-        version: "fledgling_save_v1",
-        revision: mustGetNumber(obj, "revision"),
-        turn: mustGetNumber(obj, "turn"),
-        name: mustGetString(obj, "name"),
-        thrallTemplateId: mustGetNumber(obj, "thrallTemplateId"),
-        nImprovements: mustGetNumber(obj, "nImprovements"),
-        stats: mustGetStatCounterV1(obj, "stats"),
-        talents: mustGetStatCounterV1(obj, "talents"),
-        isInPenance: mustGetBoolean(obj, "isInPenance"),
-        wishId: mustGetNumber(obj, "wishId"),
-        exp: mustGetNumber(obj, "exp"),
-        blood: mustGetNumber(obj, "blood"),
-        itemsPurloined: mustGetNumber(obj, "itemsPurloined"),
-        skillsLearned: mustGetNumberArray(obj, "skillsLearned"),
-        untrimmedSkillsAvailableIds: mustGetNumberArray(obj, "untrimmedSkillsAvailableIds"),
-        thrallsUnlocked: mustGetNumberArray(obj, "thrallsUnlocked"),
-        thrallDamage: mustGetNumberArray(obj, "thrallDamage"),
-        thrallsObtainedItem: mustGetNumberArray(obj, "thrallsObtainedItem"),
-        thrallsDeliveredItem: mustGetNumberArray(obj, "thrallsDeliveredItem"),
+      agi: mustGetNumber(val, "agi"),
+      int: mustGetNumber(val, "int"),
+      cha: mustGetNumber(val, "cha"),
+      psi: mustGetNumber(val, "psi"),
     };
+  } catch (e) {
+    let message = "unrecognizable error";
+    if (e instanceof Error) {
+      message = e.message;
+    }
+    throw new Error(`reading ${key}: ${message}`);
+  }
 }
 
-function mustGetNumber(obj: object, key: string) : number {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "number") {
-        throw new Error(`not a number: ${key}: ${val}`);
-    }
-    return val;
+function mustGetBoolean(obj: object, key: string): boolean {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "boolean") {
+    throw new Error(`not boolean: ${key}: ${val}`);
+  }
+  return val;
 }
 
-function mustGetString(obj: object, key: string) : string {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "string") {
-        throw new Error(`not a string: ${key}: ${val}`);
-    }
-    return val;
-}
+function mustGetNumberArray(obj: object, key: string): number[] {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "object") {
+    throw new Error(`not an object: ${key}: ${val}`);
+  }
 
-function mustGetStatCounterV1(obj: object, key: string) : StatCounterV1 {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
+  for (const x of val) {
+    if (typeof x !== "number") {
+      throw new Error(`contained non-number item in ${key}: ${val}`);
     }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "object") {
-        throw new Error(`not an object: ${key}: ${val}`);
-    }
-
-    try {
-        return {
-            agi: mustGetNumber(val, "agi"),
-            int: mustGetNumber(val, "int"),
-            cha: mustGetNumber(val, "cha"),
-            psi: mustGetNumber(val, "psi"),
-        };
-    } catch (e) {
-        let message = "unrecognizable error";
-        if (e instanceof Error) {
-            message = e.message;
-        }
-        throw new Error(`reading ${key}: ${message}`);
-    }
-}
-
-function mustGetBoolean(obj: object, key: string) : boolean {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "boolean") {
-        throw new Error(`not boolean: ${key}: ${val}`);
-    }
-    return val;
-}
-
-function mustGetNumberArray(obj: object, key: string) : number[] {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "object") {
-        throw new Error(`not an object: ${key}: ${val}`);
-    }
-
-    for (const x of val) {
-        if (typeof(x) !== "number") {
-            throw new Error(`contained non-number item in ${key}: ${val}`);
-        }
-    }
-    return val;
+  }
+  return val;
 }
 
 /// The result of attempting to load a V1 save file.
 interface SaveFileV1LoadResult {
-    // If present and valid, the loaded file.
-    file : SaveFileV1 | null;
+  // If present and valid, the loaded file.
+  file: SaveFileV1 | null;
 
-    /// A file loading error, if any. If `file` is present, this refers
-    /// to an error reading from the *other* slot. 
-    error: string | null;
+  /// A file loading error, if any. If `file` is present, this refers
+  /// to an error reading from the *other* slot.
+  error: string | null;
 
-    /// The slot this file was loaded from, or that a load attempt failed from.
-    /// If multiple load attempts failed and none succeeded, this refers to
-    /// any one attempted slot.
-    slot: SaveSlot;
+  /// The slot this file was loaded from, or that a load attempt failed from.
+  /// If multiple load attempts failed and none succeeded, this refers to
+  /// any one attempted slot.
+  slot: SaveSlot;
 }
 
 function readFromSlot(slot: SaveSlot): SaveFileV1LoadResult {
-    var serialized = localStorage.getItem(slot);
-    if (serialized === null) {
-        return {
-            file: null,
-            error: null,
-            slot: slot,
-        };
-    }
-    try {
-        return {
-            file: mustBeSaveFileV1(JSON.parse(serialized)),
-            error: null,
-            slot: slot,
-        };
-    } catch (e) {
-        let message = "unidentifiable error";
-        if (e instanceof Error) {
-            message = e.message;
-        }
-        return {
-            file: null,
-            error: message,
-            slot: slot,
-        };
+  var serialized = localStorage.getItem(slot);
+  if (serialized === null) {
+    return {
+      file: null,
+      error: null,
+      slot: slot,
+    };
+  }
+  try {
+    return {
+      file: mustBeSaveFileV1(JSON.parse(serialized)),
+      error: null,
+      slot: slot,
+    };
+  } catch (e) {
+    let message = "unidentifiable error";
+    if (e instanceof Error) {
+      message = e.message;
     }
+    return {
+      file: null,
+      error: message,
+      slot: slot,
+    };
+  }
 }
 
 /// Reads the more recent valid save file, if either is valid. If no save files
 /// are present, `file` and `error` will both be absent. If an invalid save
 /// file is discovered, `error` will refer to the issue(s) detected.
 function readBestSave(): SaveFileV1LoadResult {
-    const from1 = readFromSlot("FLEDGLING_SLOT_1");
-    const from2 = readFromSlot("FLEDGLING_SLOT_2");
-    if (from1.file && from2.file) {
-        return (from1.file.revision > from2.file.revision) ? from1 : from2;
-    }
+  const from1 = readFromSlot("FLEDGLING_SLOT_1");
+  const from2 = readFromSlot("FLEDGLING_SLOT_2");
+  if (from1.file && from2.file) {
+    return from1.file.revision > from2.file.revision ? from1 : from2;
+  }
 
-    var errors : string[] = [];
-    if (from1.error) {
-        errors = ["slot 1 error: " + from1.error];
-    }
-    if (from2.error) {
-        errors.push("slot 2 error: " + from2.error);
-    }
-    var msg : string | null = errors.length > 0 ? errors.join("\n") : null;
-    if (from1.file) {
-        return {
-            file: from1.file,
-            error: msg,
-            slot: "FLEDGLING_SLOT_1",
-        };
-    }
+  var errors: string[] = [];
+  if (from1.error) {
+    errors = ["slot 1 error: " + from1.error];
+  }
+  if (from2.error) {
+    errors.push("slot 2 error: " + from2.error);
+  }
+  var msg: string | null = errors.length > 0 ? errors.join("\n") : null;
+  if (from1.file) {
     return {
-        file: from2.file,
-        error: msg,
-        slot: "FLEDGLING_SLOT_2",
+      file: from1.file,
+      error: msg,
+      slot: "FLEDGLING_SLOT_1",
     };
+  }
+  return {
+    file: from2.file,
+    error: msg,
+    slot: "FLEDGLING_SLOT_2",
+  };
 }
 
 export function save() {
-    const targetSlot : SaveSlot = (readBestSave().slot === "FLEDGLING_SLOT_1") ? "FLEDGLING_SLOT_2" : "FLEDGLING_SLOT_1";
-    return saveIntoSlot(targetSlot);
+  const targetSlot: SaveSlot =
+    readBestSave().slot === "FLEDGLING_SLOT_1"
+      ? "FLEDGLING_SLOT_2"
+      : "FLEDGLING_SLOT_1";
+  return saveIntoSlot(targetSlot);
 }
 
-function extractCurrentState() : SaveFileV1 {
-    const progress = getPlayerProgress();
-    const stateManager = getStateManager();
-    var thrallDamage : number[] = [];
-    const nThralls = getThralls().length;
-    for (let i = 0; i < nThralls; ++i) {
-        thrallDamage.push(progress.getThrallDamage({id: i}));
-    }
-    return {
-        version: "fledgling_save_v1",
-        revision: stateManager.nextRevision(),
-        turn: stateManager.getTurn(),
-        name: progress.name,
-        thrallTemplateId: progress.template.id,
-        nImprovements: progress.nImprovements,
-        stats: {
-            agi: progress.getStat("AGI"),
-            int: progress.getStat("INT"),
-            cha: progress.getStat("CHA"),
-            psi: progress.getStat("PSI"),
-        },
-        talents: {
-            agi: progress.getStat("AGI"),
-            int: progress.getStat("INT"),
-            cha: progress.getStat("CHA"),
-            psi: progress.getStat("PSI"),
-        },
-        isInPenance: progress.isInPenance,
-        wishId: progress.getWish()?.id ?? -1,
-        exp: progress.getExperience(),
-        blood: progress.getBlood(),
-        itemsPurloined: progress.getItemsPurloined(),
-        skillsLearned: progress.getRawLearnedSkills(),
-        untrimmedSkillsAvailableIds: progress.getUntrimmedAvailableSkillIds(),
-        thrallsUnlocked: progress.getUnlockedThrallIds(),
-        thrallDamage: thrallDamage,
-        thrallsObtainedItem: progress.getThrallObtainedItemIds(),
-        thrallsDeliveredItem: progress.getThrallDeliveredItemIds(),
-    };
+function extractCurrentState(): SaveFileV1 {
+  const progress = getPlayerProgress();
+  const stateManager = getStateManager();
+  var thrallDamage: number[] = [];
+  const nThralls = getThralls().length;
+  for (let i = 0; i < nThralls; ++i) {
+    thrallDamage.push(progress.getThrallDamage({ id: i }));
+  }
+  return {
+    version: "fledgling_save_v1",
+    revision: stateManager.nextRevision(),
+    turn: stateManager.getTurn(),
+    name: progress.name,
+    thrallTemplateId: progress.template.id,
+    nImprovements: progress.nImprovements,
+    stats: {
+      agi: progress.getStat("AGI"),
+      int: progress.getStat("INT"),
+      cha: progress.getStat("CHA"),
+      psi: progress.getStat("PSI"),
+    },
+    talents: {
+      agi: progress.getStat("AGI"),
+      int: progress.getStat("INT"),
+      cha: progress.getStat("CHA"),
+      psi: progress.getStat("PSI"),
+    },
+    isInPenance: progress.isInPenance,
+    wishId: progress.getWish()?.id ?? -1,
+    exp: progress.getExperience(),
+    blood: progress.getBlood(),
+    itemsPurloined: progress.getItemsPurloined(),
+    skillsLearned: progress.getRawLearnedSkills(),
+    untrimmedSkillsAvailableIds: progress.getUntrimmedAvailableSkillIds(),
+    thrallsUnlocked: progress.getUnlockedThrallIds(),
+    thrallDamage: thrallDamage,
+    thrallsObtainedItem: progress.getThrallObtainedItemIds(),
+    thrallsDeliveredItem: progress.getThrallDeliveredItemIds(),
+  };
 }
 
 function saveIntoSlot(slot: SaveSlot) {
-    localStorage.setItem(slot, JSON.stringify(extractCurrentState()));
+  localStorage.setItem(slot, JSON.stringify(extractCurrentState()));
 }
 
 export function wipeSaves() {
-    localStorage.removeItem("FLEDGLING_SLOT_1");
-    localStorage.removeItem("FLEDGLING_SLOT_2");
-}
\ No newline at end of file
+  localStorage.removeItem("FLEDGLING_SLOT_1");
+  localStorage.removeItem("FLEDGLING_SLOT_2");
+}
diff --git a/src/saveformat.ts b/src/saveformat.ts
index c141c30..2c04f0b 100644
--- a/src/saveformat.ts
+++ b/src/saveformat.ts
@@ -1,180 +1,183 @@
-export interface StatCounterV1{
-    agi: number;
-    int: number;
-    cha: number;
-    psi: number;
+export interface StatCounterV1 {
+  agi: number;
+  int: number;
+  cha: number;
+  psi: number;
 }
 
 export interface SaveFileV1 {
-    version: "fledgling_save_v1";
-    revision: number;
+  version: "fledgling_save_v1";
+  revision: number;
 
-    turn: number;
+  turn: number;
 
-    name: string;
-    thrallTemplateId: number;
-    nImprovements: number;
-    stats: StatCounterV1;
-    talents: StatCounterV1;
-    isInPenance: boolean;
-    wishId: number;  // negative: Wish is absent
-    exp: number;
-    blood: number;
-    itemsPurloined: number;
-    skillsLearned: number[];
-    untrimmedSkillsAvailableIds: number[];
-    thrallsUnlocked: number[];
-    thrallDamage: number[];  // 0: thrall is absent or undamaged
-    thrallsObtainedItem: number[];
-    thrallsDeliveredItem: number[];
+  name: string;
+  thrallTemplateId: number;
+  nImprovements: number;
+  stats: StatCounterV1;
+  talents: StatCounterV1;
+  isInPenance: boolean;
+  wishId: number; // negative: Wish is absent
+  exp: number;
+  blood: number;
+  itemsPurloined: number;
+  skillsLearned: number[];
+  untrimmedSkillsAvailableIds: number[];
+  thrallsUnlocked: number[];
+  thrallDamage: number[]; // 0: thrall is absent or undamaged
+  thrallsObtainedItem: number[];
+  thrallsDeliveredItem: number[];
 }
 
 /// Checks whether obj is a valid save file, as far as we can tell, and returns
 /// it unchanged if it is, or throws an error if it's not valid.
 export function mustBeSaveFileV1(obj: unknown): SaveFileV1 {
-    if (obj === undefined || obj === null) {
-        throw new Error("nonexistent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`not an object; was ${typeof(obj)}`);
-    }
+  if (obj === undefined || obj === null) {
+    throw new Error("nonexistent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`not an object; was ${typeof obj}`);
+  }
 
-    if (!("version" in obj)) {
-        throw new Error("no magic number");
-    }
-    if (obj.version !== "fledgling_save_v1") {
-        throw new Error(`bad magic number: ${obj.version}`);
-    }
+  if (!("version" in obj)) {
+    throw new Error("no magic number");
+  }
+  if (obj.version !== "fledgling_save_v1") {
+    throw new Error(`bad magic number: ${obj.version}`);
+  }
 
+  return {
+    version: "fledgling_save_v1",
+    revision: mustGetNumber(obj, "revision"),
+    turn: mustGetNumber(obj, "turn"),
+    name: mustGetString(obj, "name"),
+    thrallTemplateId: mustGetNumber(obj, "thrallTemplateId"),
+    nImprovements: mustGetNumber(obj, "nImprovements"),
+    stats: mustGetStatCounterV1(obj, "stats"),
+    talents: mustGetStatCounterV1(obj, "talents"),
+    isInPenance: mustGetBoolean(obj, "isInPenance"),
+    wishId: mustGetNumber(obj, "wishId"),
+    exp: mustGetNumber(obj, "exp"),
+    blood: mustGetNumber(obj, "blood"),
+    itemsPurloined: mustGetNumber(obj, "itemsPurloined"),
+    skillsLearned: mustGetNumberArray(obj, "skillsLearned"),
+    untrimmedSkillsAvailableIds: mustGetNumberArray(
+      obj,
+      "untrimmedSkillsAvailableIds",
+    ),
+    thrallsUnlocked: mustGetNumberArray(obj, "thrallsUnlocked"),
+    thrallDamage: mustGetNumberArray(obj, "thrallDamage"),
+    thrallsObtainedItem: mustGetNumberArray(obj, "thrallsObtainedItem"),
+    thrallsDeliveredItem: mustGetNumberArray(obj, "thrallsDeliveredItem"),
+  };
+}
+
+function mustGetNumber(obj: object, key: string): number {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "number") {
+    throw new Error(`not a number: ${key}: ${val}`);
+  }
+  return val;
+}
+
+function mustGetString(obj: object, key: string): string {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "string") {
+    throw new Error(`not a string: ${key}: ${val}`);
+  }
+  return val;
+}
+
+function mustGetStatCounterV1(obj: object, key: string): StatCounterV1 {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "object") {
+    throw new Error(`not an object: ${key}: ${val}`);
+  }
+
+  try {
     return {
-        version: "fledgling_save_v1",
-        revision: mustGetNumber(obj, "revision"),
-        turn: mustGetNumber(obj, "turn"),
-        name: mustGetString(obj, "name"),
-        thrallTemplateId: mustGetNumber(obj, "thrallTemplateId"),
-        nImprovements: mustGetNumber(obj, "nImprovements"),
-        stats: mustGetStatCounterV1(obj, "stats"),
-        talents: mustGetStatCounterV1(obj, "talents"),
-        isInPenance: mustGetBoolean(obj, "isInPenance"),
-        wishId: mustGetNumber(obj, "wishId"),
-        exp: mustGetNumber(obj, "exp"),
-        blood: mustGetNumber(obj, "blood"),
-        itemsPurloined: mustGetNumber(obj, "itemsPurloined"),
-        skillsLearned: mustGetNumberArray(obj, "skillsLearned"),
-        untrimmedSkillsAvailableIds: mustGetNumberArray(obj, "untrimmedSkillsAvailableIds"),
-        thrallsUnlocked: mustGetNumberArray(obj, "thrallsUnlocked"),
-        thrallDamage: mustGetNumberArray(obj, "thrallDamage"),
-        thrallsObtainedItem: mustGetNumberArray(obj, "thrallsObtainedItem"),
-        thrallsDeliveredItem: mustGetNumberArray(obj, "thrallsDeliveredItem"),
+      agi: mustGetNumber(val, "agi"),
+      int: mustGetNumber(val, "int"),
+      cha: mustGetNumber(val, "cha"),
+      psi: mustGetNumber(val, "psi"),
     };
+  } catch (e) {
+    let message = "unrecognizable error";
+    if (e instanceof Error) {
+      message = e.message;
+    }
+    throw new Error(`reading ${key}: ${message}`);
+  }
 }
 
-function mustGetNumber(obj: object, key: string) : number {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "number") {
-        throw new Error(`not a number: ${key}: ${val}`);
-    }
-    return val;
+function mustGetBoolean(obj: object, key: string): boolean {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "boolean") {
+    throw new Error(`not boolean: ${key}: ${val}`);
+  }
+  return val;
 }
 
-function mustGetString(obj: object, key: string) : string {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
+function mustGetNumberArray(obj: object, key: string): number[] {
+  if (obj === null || obj === undefined) {
+    throw new Error("container absent");
+  }
+  if (typeof obj !== "object") {
+    throw new Error(`container was not an object; was ${typeof obj}`);
+  }
+  if (!(key in obj)) {
+    throw new Error(`missing number: ${key}`);
+  }
+  const dict = obj as { [key: string]: any };
+  const val = dict[key];
+  if (typeof val !== "object") {
+    throw new Error(`not an object: ${key}: ${val}`);
+  }
+
+  for (const x of val) {
+    if (typeof x !== "number") {
+      throw new Error(`contained non-number item in ${key}: ${val}`);
     }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "string") {
-        throw new Error(`not a string: ${key}: ${val}`);
-    }
-    return val;
+  }
+  return val;
 }
-
-function mustGetStatCounterV1(obj: object, key: string) : StatCounterV1 {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "object") {
-        throw new Error(`not an object: ${key}: ${val}`);
-    }
-
-    try {
-        return {
-            agi: mustGetNumber(val, "agi"),
-            int: mustGetNumber(val, "int"),
-            cha: mustGetNumber(val, "cha"),
-            psi: mustGetNumber(val, "psi"),
-        };
-    } catch (e) {
-        let message = "unrecognizable error";
-        if (e instanceof Error) {
-            message = e.message;
-        }
-        throw new Error(`reading ${key}: ${message}`);
-    }
-}
-
-function mustGetBoolean(obj: object, key: string) : boolean {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "boolean") {
-        throw new Error(`not boolean: ${key}: ${val}`);
-    }
-    return val;
-}
-
-function mustGetNumberArray(obj: object, key: string) : number[] {
-    if (obj === null || obj === undefined) {
-        throw new Error("container absent");
-    }
-    if (typeof(obj) !== "object") {
-        throw new Error(`container was not an object; was ${typeof(obj)}`);
-    }
-    if (!(key in obj)) {
-        throw new Error(`missing number: ${key}`);
-    }
-    const dict = obj as {[key:string]:any};
-    const val = dict[key];
-    if (typeof(val) !== "object") {
-        throw new Error(`not an object: ${key}: ${val}`);
-    }
-
-    for (const x of val) {
-        if (typeof(x) !== "number") {
-            throw new Error(`contained non-number item in ${key}: ${val}`);
-        }
-    }
-    return val;
-}
\ No newline at end of file
diff --git a/src/statemanager.ts b/src/statemanager.ts
index 7b09f44..060998b 100644
--- a/src/statemanager.ts
+++ b/src/statemanager.ts
@@ -18,7 +18,7 @@ export class StateManager {
   #turn: number;
   #revision: number;
 
-  constructor(file?:SaveFileV1) {
+  constructor(file?: SaveFileV1) {
     this.#turn = file?.turn ?? 1;
     this.#revision = file?.revision ?? 1;
   }