diff --git a/docs/mammon-api.yml b/docs/mammon-api.yml
index f85d475..f8171cb 100644
--- a/docs/mammon-api.yml
+++ b/docs/mammon-api.yml
@@ -43,8 +43,7 @@ paths:
         "400":
           description: |-
             Returned when:
-            - a binding references a ledger the caller does not own
-            - a binding references a ledger that is not a main ledger
+            - a ledger scope reference is not one of the caller's own main ledgers
   /ledgers/main/{ledgerId}:
     put:
       tags:
@@ -438,11 +437,38 @@ paths:
     get:
       tags:
       - rule-script
-      summary: Download the TypeScript definitions for the rule script runtime
-      operationId: getScriptDefinitions
+      summary: List the available rule script type definition files
+      operationId: listScriptDefinitions
       responses:
         "200":
-          description: The rule-runner.d.ts type definitions
+          description: The names of the available .d.ts type definitions
+          content:
+            '*/*':
+              schema:
+                type: array
+                items:
+                  type: string
+  /rule-scripts/definitions/{name}:
+    get:
+      tags:
+      - rule-script
+      summary: Download a rule script type definition file by name
+      operationId: getScriptDefinition
+      parameters:
+      - name: name
+        in: path
+        required: true
+        schema:
+          type: string
+      responses:
+        "200":
+          description: The requested .d.ts type definitions
+          content:
+            text/plain:
+              schema:
+                type: string
+        "404":
+          description: No type definition with that name exists
           content:
             text/plain:
               schema:
@@ -974,8 +1000,10 @@ paths:
           format: uuid
       responses:
         "200":
-          description: "Daily realized profit for the ledger, ascending by date, only\
-            \ for days with a sale"
+          description: "Daily FIFO-realized profit for the ledger, ascending by date,\
+            \ only for days with a sale. iskIn is the sum of that day's profitable\
+            \ trades, iskOut is the sum of that day's losing trades (as a positive\
+            \ deficit); profit is iskIn minus iskOut."
           content:
             '*/*':
               schema:
@@ -1127,50 +1155,180 @@ paths:
                   $ref: "#/components/schemas/AcquisitionResponse"
 components:
   schemas:
-    UpdateRuleBookRequest:
+    RuleScopeRequest:
       type: object
-      description: Request to update the caller's rule book; replaces its mutable
-        fields.
+      description: The ledgers and other resources to bind to a rule script.
       properties:
-        bindings:
+        ledgers:
           type: object
           additionalProperties:
             type: string
             format: uuid
           description: "Ledger references the script writes to, each bound to one\
-            \ of the user's ledgers."
+            \ of the user's own main ledgers."
+        characters:
+          type: object
+          additionalProperties:
+            type: integer
+            format: int64
+          description: "Character references the script can read, each bound to one\
+            \ of the user's own characters."
+        corporations:
+          type: object
+          additionalProperties:
+            type: integer
+            format: int64
+          description: "Corporation references the script can read, each bound to\
+            \ a corporation of one of the user's own characters."
+        walletDivisions:
+          type: object
+          additionalProperties:
+            $ref: "#/components/schemas/WalletDivisionTargetRequest"
+          description: "Corporation wallet division references the script can read,\
+            \ each bound to a corporation of one of the user's own characters."
+      required:
+      - characters
+      - corporations
+      - ledgers
+      - walletDivisions
+    RuleScriptRequest:
+      type: object
+      description: "A named rule script to store in the book, together with its scope."
+      properties:
+        name:
+          type: string
+          description: Unique script name within the book; a lowercase alphanumeric
+            identifier.
+          example: sales
+        scope:
+          $ref: "#/components/schemas/RuleScopeRequest"
+          description: The ledgers and other resources bound to this script.
         script:
           type: string
           description: The classification script source.
-          example: transfer.to('sales')
+          example: transfer.to('wallet')
       required:
-      - bindings
+      - name
+      - scope
       - script
+    UpdateRuleBookRequest:
+      type: object
+      description: Request to update the caller's rule book; replaces its rule scripts.
+      properties:
+        scripts:
+          type: array
+          description: The rule scripts making up the book.
+          items:
+            $ref: "#/components/schemas/RuleScriptRequest"
+      required:
+      - scripts
+    WalletDivisionTargetRequest:
+      type: object
+      description: A corporation wallet division to bind.
+      properties:
+        corporationId:
+          type: integer
+          format: int64
+          description: The corporation the wallet division belongs to.
+          example: 98000001
+        division:
+          type: integer
+          format: int32
+          description: "The wallet division number, from 1 to 7."
+          example: 1
+      required:
+      - corporationId
+      - division
     RuleBookResponse:
       type: object
-      description: "The caller's rule book: a script that classifies transactions,\
-        \ together with its ledger bindings."
+      description: "The caller's rule book: the named rule scripts that classify transactions,\
+        \ each with its scope."
       properties:
         userId:
           type: string
           format: uuid
           description: Owning user identifier.
           example: 3fa85f64-5717-4562-b3fc-2c963f66afa6
-        bindings:
+        scripts:
+          type: array
+          description: The rule scripts making up the book.
+          items:
+            $ref: "#/components/schemas/RuleScriptResponse"
+      required:
+      - scripts
+      - userId
+    RuleScopeResponse:
+      type: object
+      description: The ledgers and other resources bound to a rule script.
+      properties:
+        ledgers:
           type: object
           additionalProperties:
             type: string
             format: uuid
           description: "Ledger references the script writes to, each bound to one\
-            \ of the user's ledgers."
+            \ of the user's own main ledgers."
+        characters:
+          type: object
+          additionalProperties:
+            type: integer
+            format: int64
+          description: "Character references the script can read, each bound to one\
+            \ of the user's own characters."
+        corporations:
+          type: object
+          additionalProperties:
+            type: integer
+            format: int64
+          description: "Corporation references the script can read, each bound to\
+            \ a corporation of one of the user's own characters."
+        walletDivisions:
+          type: object
+          additionalProperties:
+            $ref: "#/components/schemas/WalletDivisionTargetResponse"
+          description: "Corporation wallet division references the script can read,\
+            \ each bound to a corporation of one of the user's own characters."
+      required:
+      - characters
+      - corporations
+      - ledgers
+      - walletDivisions
+    RuleScriptResponse:
+      type: object
+      description: "A named rule script within the book, together with its scope."
+      properties:
+        name:
+          type: string
+          description: Unique script name within the book.
+          example: sales
+        scope:
+          $ref: "#/components/schemas/RuleScopeResponse"
+          description: The ledgers and other resources bound to this script.
         script:
           type: string
           description: The classification script source.
-          example: transfer.to('sales')
+          example: transfer.to('wallet')
       required:
-      - bindings
+      - name
+      - scope
       - script
-      - userId
+    WalletDivisionTargetResponse:
+      type: object
+      description: A corporation wallet division bound to the script.
+      properties:
+        corporationId:
+          type: integer
+          format: int64
+          description: The corporation the wallet division belongs to.
+          example: 98000001
+        division:
+          type: integer
+          format: int32
+          description: "The wallet division number, from 1 to 7."
+          example: 1
+      required:
+      - corporationId
+      - division
     UpdateMainLedgerRequest:
       type: object
       description: Request to update an existing main ledger.
diff --git a/src/components/Dropdown.vue b/src/components/Dropdown.vue
index ce68a8e..4b3e5bb 100644
--- a/src/components/Dropdown.vue
+++ b/src/components/Dropdown.vue
@@ -41,12 +41,11 @@ useEventListener('keyup', e => {
 
 <template>
     <div ref="root" class="dropdown" :class="{'dropdown-open': isOpen, 'dropdown-close': !isOpen}" v-on-click-outside="[doAutoClose, { ignore: [floating] }]">
-        <button @click="isOpen = !isOpen" class="cursor-pointer">
+        <button @click="isOpen = !isOpen" class="flex items-center cursor-pointer border-none bg-transparent hover:bg-transparent p-0">
             <Transition
+                mode="out-in"
                 enter-active-class="transition-transform"
-                enter-from-class="rotate-180"
-                leave-active-class="hidden"
-                leave-to-class="rotate-180">
+                enter-from-class="rotate-180">
                 <ChevronDownIcon v-if="!isOpen" class="chevron" />
                 <ChevronUpIcon v-else class="chevron" />
             </Transition>
diff --git a/src/generated/mammon/api.ts b/src/generated/mammon/api.ts
index 18b2d8b..49ffa98 100644
--- a/src/generated/mammon/api.ts
+++ b/src/generated/mammon/api.ts
@@ -732,7 +732,7 @@ export interface ReprocessingResultResponse {
     'output': Array<MarketTypeStackAppraisalResponse>;
 }
 /**
- * The caller\'s rule book: a script that classifies transactions, together with its ledger bindings.
+ * The caller\'s rule book: the named rule scripts that classify transactions, each with its scope.
  */
 export interface RuleBookResponse {
     /**
@@ -740,9 +740,81 @@ export interface RuleBookResponse {
      */
     'userId': string;
     /**
-     * Ledger references the script writes to, each bound to one of the user\'s ledgers.
+     * The rule scripts making up the book.
      */
-    'bindings': { [key: string]: string; };
+    'scripts': Array<RuleScriptResponse>;
+}
+/**
+ * The ledgers and other resources to bind to a rule script.
+ */
+export interface RuleScopeRequest {
+    /**
+     * Ledger references the script writes to, each bound to one of the user\'s own main ledgers.
+     */
+    'ledgers': { [key: string]: string; };
+    /**
+     * Character references the script can read, each bound to one of the user\'s own characters.
+     */
+    'characters': { [key: string]: number; };
+    /**
+     * Corporation references the script can read, each bound to a corporation of one of the user\'s own characters.
+     */
+    'corporations': { [key: string]: number; };
+    /**
+     * Corporation wallet division references the script can read, each bound to a corporation of one of the user\'s own characters.
+     */
+    'walletDivisions': { [key: string]: WalletDivisionTargetRequest; };
+}
+/**
+ * The ledgers and other resources bound to a rule script.
+ */
+export interface RuleScopeResponse {
+    /**
+     * Ledger references the script writes to, each bound to one of the user\'s own main ledgers.
+     */
+    'ledgers': { [key: string]: string; };
+    /**
+     * Character references the script can read, each bound to one of the user\'s own characters.
+     */
+    'characters': { [key: string]: number; };
+    /**
+     * Corporation references the script can read, each bound to a corporation of one of the user\'s own characters.
+     */
+    'corporations': { [key: string]: number; };
+    /**
+     * Corporation wallet division references the script can read, each bound to a corporation of one of the user\'s own characters.
+     */
+    'walletDivisions': { [key: string]: WalletDivisionTargetResponse; };
+}
+/**
+ * A named rule script to store in the book, together with its scope.
+ */
+export interface RuleScriptRequest {
+    /**
+     * Unique script name within the book; a lowercase alphanumeric identifier.
+     */
+    'name': string;
+    /**
+     * The ledgers and other resources bound to this script.
+     */
+    'scope': RuleScopeRequest;
+    /**
+     * The classification script source.
+     */
+    'script': string;
+}
+/**
+ * A named rule script within the book, together with its scope.
+ */
+export interface RuleScriptResponse {
+    /**
+     * Unique script name within the book.
+     */
+    'name': string;
+    /**
+     * The ledgers and other resources bound to this script.
+     */
+    'scope': RuleScopeResponse;
     /**
      * The classification script source.
      */
@@ -805,17 +877,39 @@ export interface UpdateMainLedgerRequest {
     'name': string;
 }
 /**
- * Request to update the caller\'s rule book; replaces its mutable fields.
+ * Request to update the caller\'s rule book; replaces its rule scripts.
  */
 export interface UpdateRuleBookRequest {
     /**
-     * Ledger references the script writes to, each bound to one of the user\'s ledgers.
+     * The rule scripts making up the book.
      */
-    'bindings': { [key: string]: string; };
+    'scripts': Array<RuleScriptRequest>;
+}
+/**
+ * A corporation wallet division to bind.
+ */
+export interface WalletDivisionTargetRequest {
     /**
-     * The classification script source.
+     * The corporation the wallet division belongs to.
      */
-    'script': string;
+    'corporationId': number;
+    /**
+     * The wallet division number, from 1 to 7.
+     */
+    'division': number;
+}
+/**
+ * A corporation wallet division bound to the script.
+ */
+export interface WalletDivisionTargetResponse {
+    /**
+     * The corporation the wallet division belongs to.
+     */
+    'corporationId': number;
+    /**
+     * The wallet division number, from 1 to 7.
+     */
+    'division': number;
 }
 
 /**
@@ -3909,12 +4003,16 @@ export const RuleScriptApiAxiosParamCreator = function (configuration?: Configur
     return {
         /**
          * 
-         * @summary Download the TypeScript definitions for the rule script runtime
+         * @summary Download a rule script type definition file by name
+         * @param {string} name 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        getScriptDefinitions: async (options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
-            const localVarPath = `/rule-scripts/definitions`;
+        getScriptDefinition: async (name: string, options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
+            // verify required parameter 'name' is not null or undefined
+            assertParamExists('getScriptDefinition', 'name', name)
+            const localVarPath = `/rule-scripts/definitions/{name}`
+                .replace('{name}', encodeURIComponent(String(name)));
             // use dummy base URL string because the URL constructor only accepts absolute URLs.
             const localVarUrlObj = new URL(localVarPath, DUMMY_BASE_URL);
             let baseOptions;
@@ -3932,6 +4030,36 @@ export const RuleScriptApiAxiosParamCreator = function (configuration?: Configur
             let headersFromBaseOptions = baseOptions && baseOptions.headers ? baseOptions.headers : {};
             localVarRequestOptions.headers = {...localVarHeaderParameter, ...headersFromBaseOptions, ...options.headers};
 
+            return {
+                url: toPathString(localVarUrlObj),
+                options: localVarRequestOptions,
+            };
+        },
+        /**
+         * 
+         * @summary List the available rule script type definition files
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        listScriptDefinitions: async (options: RawAxiosRequestConfig = {}): Promise<RequestArgs> => {
+            const localVarPath = `/rule-scripts/definitions`;
+            // use dummy base URL string because the URL constructor only accepts absolute URLs.
+            const localVarUrlObj = new URL(localVarPath, DUMMY_BASE_URL);
+            let baseOptions;
+            if (configuration) {
+                baseOptions = configuration.baseOptions;
+            }
+
+            const localVarRequestOptions = { method: 'GET', ...baseOptions, ...options};
+            const localVarHeaderParameter = {} as any;
+            const localVarQueryParameter = {} as any;
+
+            localVarHeaderParameter['Accept'] = '*/*';
+
+            setSearchParams(localVarUrlObj, localVarQueryParameter);
+            let headersFromBaseOptions = baseOptions && baseOptions.headers ? baseOptions.headers : {};
+            localVarRequestOptions.headers = {...localVarHeaderParameter, ...headersFromBaseOptions, ...options.headers};
+
             return {
                 url: toPathString(localVarUrlObj),
                 options: localVarRequestOptions,
@@ -3948,14 +4076,27 @@ export const RuleScriptApiFp = function(configuration?: Configuration) {
     return {
         /**
          * 
-         * @summary Download the TypeScript definitions for the rule script runtime
+         * @summary Download a rule script type definition file by name
+         * @param {string} name 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        async getScriptDefinitions(options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<string>> {
-            const localVarAxiosArgs = await localVarAxiosParamCreator.getScriptDefinitions(options);
+        async getScriptDefinition(name: string, options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<string>> {
+            const localVarAxiosArgs = await localVarAxiosParamCreator.getScriptDefinition(name, options);
             const localVarOperationServerIndex = configuration?.serverIndex ?? 0;
-            const localVarOperationServerBasePath = operationServerMap['RuleScriptApi.getScriptDefinitions']?.[localVarOperationServerIndex]?.url;
+            const localVarOperationServerBasePath = operationServerMap['RuleScriptApi.getScriptDefinition']?.[localVarOperationServerIndex]?.url;
+            return (axios, basePath) => createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration)(axios, localVarOperationServerBasePath || basePath);
+        },
+        /**
+         * 
+         * @summary List the available rule script type definition files
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        async listScriptDefinitions(options?: RawAxiosRequestConfig): Promise<(axios?: AxiosInstance, basePath?: string) => AxiosPromise<Array<string>>> {
+            const localVarAxiosArgs = await localVarAxiosParamCreator.listScriptDefinitions(options);
+            const localVarOperationServerIndex = configuration?.serverIndex ?? 0;
+            const localVarOperationServerBasePath = operationServerMap['RuleScriptApi.listScriptDefinitions']?.[localVarOperationServerIndex]?.url;
             return (axios, basePath) => createRequestFunction(localVarAxiosArgs, globalAxios, BASE_PATH, configuration)(axios, localVarOperationServerBasePath || basePath);
         },
     }
@@ -3969,12 +4110,22 @@ export const RuleScriptApiFactory = function (configuration?: Configuration, bas
     return {
         /**
          * 
-         * @summary Download the TypeScript definitions for the rule script runtime
+         * @summary Download a rule script type definition file by name
+         * @param {string} name 
          * @param {*} [options] Override http request option.
          * @throws {RequiredError}
          */
-        getScriptDefinitions(options?: RawAxiosRequestConfig): AxiosPromise<string> {
-            return localVarFp.getScriptDefinitions(options).then((request) => request(axios, basePath));
+        getScriptDefinition(name: string, options?: RawAxiosRequestConfig): AxiosPromise<string> {
+            return localVarFp.getScriptDefinition(name, options).then((request) => request(axios, basePath));
+        },
+        /**
+         * 
+         * @summary List the available rule script type definition files
+         * @param {*} [options] Override http request option.
+         * @throws {RequiredError}
+         */
+        listScriptDefinitions(options?: RawAxiosRequestConfig): AxiosPromise<Array<string>> {
+            return localVarFp.listScriptDefinitions(options).then((request) => request(axios, basePath));
         },
     };
 };
@@ -3985,12 +4136,23 @@ export const RuleScriptApiFactory = function (configuration?: Configuration, bas
 export class RuleScriptApi extends BaseAPI {
     /**
      * 
-     * @summary Download the TypeScript definitions for the rule script runtime
+     * @summary Download a rule script type definition file by name
+     * @param {string} name 
      * @param {*} [options] Override http request option.
      * @throws {RequiredError}
      */
-    public getScriptDefinitions(options?: RawAxiosRequestConfig) {
-        return RuleScriptApiFp(this.configuration).getScriptDefinitions(options).then((request) => request(this.axios, this.basePath));
+    public getScriptDefinition(name: string, options?: RawAxiosRequestConfig) {
+        return RuleScriptApiFp(this.configuration).getScriptDefinition(name, options).then((request) => request(this.axios, this.basePath));
+    }
+
+    /**
+     * 
+     * @summary List the available rule script type definition files
+     * @param {*} [options] Override http request option.
+     * @throws {RequiredError}
+     */
+    public listScriptDefinitions(options?: RawAxiosRequestConfig) {
+        return RuleScriptApiFp(this.configuration).listScriptDefinitions(options).then((request) => request(this.axios, this.basePath));
     }
 }
 
diff --git a/src/pages/rules/EditRuleBook.vue b/src/pages/rules/EditRuleBook.vue
index bd5eb06..1dd44ee 100644
--- a/src/pages/rules/EditRuleBook.vue
+++ b/src/pages/rules/EditRuleBook.vue
@@ -4,46 +4,132 @@ import {useEventListener} from "@vueuse/core";
 import log from "loglevel";
 import {ScriptEditor, useRuleBookStore} from "@/rules";
 import {PlusIcon, TrashIcon} from "@heroicons/vue/24/outline";
+import {Dropdown} from "@/components";
 import {isMain, Ledger, LedgerSelect, systemLedger, useLedgersStore} from "@/ledger";
+import {useCharactersStore} from "@/characters";
+import {CorporationLabel, useCorporationsStore} from "@/corporations";
+import {RuleScriptRequest} from "@/generated/mammon";
 import {toast} from "@/toast";
+import {confirm} from "@/confirm";
 
-type Binding = { ref: string; ledger: Ledger };
+type LedgerScopeEntry = { ref: string; ledger: Ledger };
+type CharacterScopeEntry = { ref: string; characterId: number };
+type CorporationScopeEntry = { ref: string; corporationId: number };
+type WalletDivisionScopeEntry = { ref: string; corporationId: number; division: number };
+
+interface ScriptDraft {
+  name: string;
+  script: string;
+  ledgers: LedgerScopeEntry[];
+  characters: CharacterScopeEntry[];
+  corporations: CorporationScopeEntry[];
+  walletDivisions: WalletDivisionScopeEntry[];
+}
 
 const ruleBookStore = useRuleBookStore();
 const ledgersStore = useLedgersStore();
+const charactersStore = useCharactersStore();
+const corporationsStore = useCorporationsStore();
 
 const ledgersToUse = computed(() => [systemLedger, ...ledgersStore.ledgers.filter(isMain)]);
 
-const bindings = ref<Binding[]>([]);
-const script = ref<string>('');
-
-const ledgerRefs = computed<string[]>(() => bindings.value.map(b => b.ref));
+const scripts = ref<ScriptDraft[]>([]);
+const selectedIndex = ref(0);
+const scopesExpanded = ref(true);
+const ledgersExpanded = ref(true);
+const charactersExpanded = ref(true);
+const corporationsExpanded = ref(true);
+const walletDivisionsExpanded = ref(true);
+const selected = computed<ScriptDraft | undefined>(() => scripts.value[selectedIndex.value]);
 
 watchEffect(() => {
   const ruleBook = ruleBookStore.ruleBook;
 
-  script.value = ruleBook?.script ?? '';
-  bindings.value = Object.entries(ruleBook?.bindings ?? {})
-      .map(([ref, id]) => ({ref, ledger: ledgersToUse.value.find(l => l.ledgerId === id) ?? systemLedger}));
+  scripts.value = (ruleBook?.scripts ?? []).map(script => ({
+    name: script.name,
+    script: script.script,
+    ledgers: Object.entries(script.scope.ledgers).map(([ref, id]) => ({ref, ledger: ledgersToUse.value.find(l => l.ledgerId === id) ?? systemLedger})),
+    characters: Object.entries(script.scope.characters).map(([ref, characterId]) => ({ref, characterId})),
+    corporations: Object.entries(script.scope.corporations).map(([ref, corporationId]) => ({ref, corporationId})),
+    walletDivisions: Object.entries(script.scope.walletDivisions).map(([ref, target]) => ({ref, corporationId: target.corporationId, division: target.division})),
+  }));
+  selectedIndex.value = 0;
   log.info('Loaded rule book:', ruleBook);
 });
 
-const addBinding = () => {
-  bindings.value = [...bindings.value, {ref: '', ledger: systemLedger}];
+const editorScope = computed(() => selected.value ? {
+  ledgers: selected.value.ledgers.map(entry => entry.ref),
+  characters: selected.value.characters.map(entry => entry.ref),
+  corporations: selected.value.corporations.map(entry => entry.ref),
+  walletDivisions: selected.value.walletDivisions.map(entry => entry.ref),
+} : undefined);
+
+const scriptText = computed<string>({
+  get: () => selected.value?.script ?? '',
+  set: value => {
+    if (selected.value) {
+      selected.value.script = value;
+    }
+  },
+});
+
+const addScript = () => {
+  scripts.value = [...scripts.value, {name: '', script: '', ledgers: [], characters: [], corporations: [], walletDivisions: []}];
+  selectedIndex.value = scripts.value.length - 1;
 };
 
-const removeBinding = (index: number) => {
-  bindings.value = bindings.value.toSpliced(index, 1);
+const removeScript = async (index: number) => {
+  const script = scripts.value[index];
+
+  if (script?.script.trim() && !await confirm({message: `Delete script "${script.name || '(unnamed)'}"? It still has content.`, danger: true})) {
+    return;
+  }
+
+  scripts.value = scripts.value.toSpliced(index, 1);
+  if (selectedIndex.value >= scripts.value.length) {
+    selectedIndex.value = Math.max(0, scripts.value.length - 1);
+  }
 };
 
-const save = () => ruleBookStore.update({
-  bindings: Object.fromEntries(
-      bindings.value
-          .filter(b => b.ref)
-          .map(b => [b.ref, b.ledger.ledgerId])
-  ),
-  script: script.value
-})
+const addLedgerScope = () => selected.value?.ledgers.push({ref: '', ledger: systemLedger});
+const removeLedgerScope = (index: number) => { if (selected.value) selected.value.ledgers = selected.value.ledgers.toSpliced(index, 1); };
+
+const addCharacterScope = () => selected.value?.characters.push({ref: '', characterId: charactersStore.characters[0]?.characterId ?? 0});
+const removeCharacterScope = (index: number) => { if (selected.value) selected.value.characters = selected.value.characters.toSpliced(index, 1); };
+
+const addCorporationScope = () => selected.value?.corporations.push({ref: '', corporationId: 0});
+const removeCorporationScope = (index: number) => { if (selected.value) selected.value.corporations = selected.value.corporations.toSpliced(index, 1); };
+
+const addWalletDivisionScope = () => selected.value?.walletDivisions.push({ref: '', corporationId: 0, division: 1});
+const removeWalletDivisionScope = (index: number) => { if (selected.value) selected.value.walletDivisions = selected.value.walletDivisions.toSpliced(index, 1); };
+
+watchEffect(() => {
+  const corporationIds = new Set([
+    ...(selected.value?.corporations.map(entry => entry.corporationId) ?? []),
+    ...(selected.value?.walletDivisions.map(entry => entry.corporationId) ?? []),
+  ]);
+
+  for (const corporationId of corporationIds) {
+    if (corporationId) {
+      corporationsStore.findById(corporationId);
+    }
+  }
+});
+
+const save = () => ruleBookStore.update(
+    scripts.value
+        .filter(s => s.name)
+        .map((s): RuleScriptRequest => ({
+          name: s.name,
+          script: s.script,
+          scope: {
+            ledgers: Object.fromEntries(s.ledgers.filter(entry => entry.ref).map(entry => [entry.ref, entry.ledger.ledgerId])),
+            characters: Object.fromEntries(s.characters.filter(entry => entry.ref).map(entry => [entry.ref, entry.characterId])),
+            corporations: Object.fromEntries(s.corporations.filter(entry => entry.ref).map(entry => [entry.ref, entry.corporationId])),
+            walletDivisions: Object.fromEntries(s.walletDivisions.filter(entry => entry.ref).map(entry => [entry.ref, {corporationId: entry.corporationId, division: entry.division}])),
+          },
+        }))
+)
     .then(() => toast.success('Rule book saved'));
 
 useEventListener(window, 'keydown', (event: KeyboardEvent) => {
@@ -55,31 +141,104 @@ useEventListener(window, 'keydown', (event: KeyboardEvent) => {
 </script>
 
 <template>
-  <div class="flex flex-col mb-2 mt-4 h-[calc(100vh-4.5rem)]">
-    <div class="flex flex-col grow min-h-0">
-      <div class="border-b-1">
-        Ledger Bindings:
-        <div class="flex flex-wrap items-center mt-2">
-          <div class="flex items-center mb-2 me-2" v-for="(binding, index) in bindings" :key="index">
-            <input class="me-1" type="text" v-model="binding.ref" />
-            <span class="me-1">:</span>
-            <LedgerSelect class="me-1" :ledgers="ledgersToUse" v-model="binding.ledger" />
-            <button class="btn-icon text-amber-700 hover:text-amber-600" @click="removeBinding(index)"><TrashIcon /></button>
-          </div>
-          <div class="flex items-center mb-2">
-            <button class="btn-icon" @click="addBinding"><PlusIcon /></button>
-          </div>
+  <div class="flex mb-2 mt-4 h-[calc(100vh-1.5rem)]">
+    <div class="flex flex-col me-4 w-48 shrink-0">
+      <div class="grow overflow-y-auto">
+        <div v-for="(script, index) in scripts" :key="index"
+             class="flex items-center mb-1 px-1 py-0.5 border-l-4 cursor-pointer"
+             :class="index === selectedIndex ? 'border-emerald-500' : 'border-transparent'"
+             @click="selectedIndex = index">
+          <span class="grow truncate">{{ script.name || '(unnamed)' }}</span>
+          <button class="btn-icon text-amber-700 hover:text-amber-600" @click.stop="removeScript(index)"><TrashIcon /></button>
         </div>
-      </div>
-      <div class="flex flex-col grow min-h-0 border-b-1">
-        Script:
-        <ScriptEditor class="mt-2 mb-2" v-model="script" :ledgerRefs="ledgerRefs" />
+        <button class="btn-icon flex items-center" @click="addScript"><PlusIcon /> Add script</button>
       </div>
     </div>
-    <div class="mt-2 justify-end flex">
-      <div>
+
+    <div v-if="selected" class="flex flex-col grow min-h-0">
+      <div class="border-b-1 mb-2 pb-2">
+        Name: <input class="me-1" type="text" v-model="selected.name" />
+      </div>
+
+      <Dropdown inline :auto-close="false" v-model:open="scopesExpanded" class="mb-2">
+        <template #button>Scopes</template>
+        <Dropdown inline :auto-close="false" v-model:open="ledgersExpanded" class="ms-4 mt-2">
+          <template #button>Ledgers</template>
+          <div class="flex flex-wrap items-center mt-2">
+            <div class="flex items-center mb-2 me-2" v-for="(entry, index) in selected.ledgers" :key="index">
+              <input class="me-1" type="text" v-model="entry.ref" />
+              <span class="me-1">:</span>
+              <LedgerSelect class="me-1" :ledgers="ledgersToUse" v-model="entry.ledger" />
+              <button class="btn-icon text-amber-700 hover:text-amber-600" @click="removeLedgerScope(index)"><TrashIcon /></button>
+            </div>
+            <div class="flex items-center mb-2">
+              <button class="btn-icon" @click="addLedgerScope"><PlusIcon /></button>
+            </div>
+          </div>
+        </Dropdown>
+
+        <Dropdown inline :auto-close="false" v-model:open="charactersExpanded" class="ms-4 mt-2">
+          <template #button>Characters</template>
+          <div class="flex flex-wrap items-center mt-2">
+            <div class="flex items-center mb-2 me-2" v-for="(entry, index) in selected.characters" :key="index">
+              <input class="me-1" type="text" v-model="entry.ref" />
+              <span class="me-1">:</span>
+              <select class="me-1" v-model="entry.characterId">
+                <option v-for="character in charactersStore.characters" :key="character.characterId" :value="character.characterId">{{ character.name }}</option>
+              </select>
+              <button class="btn-icon text-amber-700 hover:text-amber-600" @click="removeCharacterScope(index)"><TrashIcon /></button>
+            </div>
+            <div class="flex items-center mb-2">
+              <button class="btn-icon" @click="addCharacterScope"><PlusIcon /></button>
+            </div>
+          </div>
+        </Dropdown>
+
+        <Dropdown inline :auto-close="false" v-model:open="corporationsExpanded" class="ms-4 mt-2">
+          <template #button>Corporations</template>
+          <div class="flex flex-wrap items-center mt-2">
+            <div class="flex items-center mb-2 me-2" v-for="(entry, index) in selected.corporations" :key="index">
+              <input class="me-1" type="text" v-model="entry.ref" />
+              <span class="me-1">:</span>
+              <input class="me-1 w-32" type="number" v-model.number="entry.corporationId" placeholder="Corporation ID" />
+              <CorporationLabel class="me-1" :corporation-id="entry.corporationId" :corporation="corporationsStore.corporations[entry.corporationId]" :size="16" v-if="entry.corporationId" />
+              <button class="btn-icon text-amber-700 hover:text-amber-600" @click="removeCorporationScope(index)"><TrashIcon /></button>
+            </div>
+            <div class="flex items-center mb-2">
+              <button class="btn-icon" @click="addCorporationScope"><PlusIcon /></button>
+            </div>
+          </div>
+        </Dropdown>
+
+        <Dropdown inline :auto-close="false" v-model:open="walletDivisionsExpanded" class="ms-4 mt-2 mb-2">
+          <template #button>Wallet Divisions</template>
+          <div class="flex flex-wrap items-center mt-2">
+            <div class="flex items-center mb-2 me-2" v-for="(entry, index) in selected.walletDivisions" :key="index">
+              <input class="me-1" type="text" v-model="entry.ref" />
+              <span class="me-1">:</span>
+              <input class="me-1 w-32" type="number" v-model.number="entry.corporationId" placeholder="Corporation ID" />
+              <input class="me-1 w-16" type="number" min="1" max="7" v-model.number="entry.division" placeholder="Division" />
+              <CorporationLabel class="me-1" :corporation-id="entry.corporationId" :corporation="corporationsStore.corporations[entry.corporationId]" :division="entry.division" :size="16" v-if="entry.corporationId" />
+              <button class="btn-icon text-amber-700 hover:text-amber-600" @click="removeWalletDivisionScope(index)"><TrashIcon /></button>
+            </div>
+            <div class="flex items-center mb-2">
+              <button class="btn-icon" @click="addWalletDivisionScope"><PlusIcon /></button>
+            </div>
+          </div>
+        </Dropdown>
+      </Dropdown>
+
+      <div class="flex flex-col grow min-h-0 border-b-1">
+        Script:
+        <ScriptEditor class="mt-2 mb-2" v-model="scriptText" :scope="editorScope" />
+      </div>
+
+      <div class="mt-2 justify-end flex">
         <button @click="save">Save</button>
       </div>
     </div>
+    <div v-else class="flex grow items-center justify-center text-neutral-500">
+      No scripts yet
+    </div>
   </div>
 </template>
diff --git a/src/rules/ScriptEditor.vue b/src/rules/ScriptEditor.vue
index bc9dc34..811dbda 100644
--- a/src/rules/ScriptEditor.vue
+++ b/src/rules/ScriptEditor.vue
@@ -22,27 +22,41 @@ const loadScriptDefinitions = async () => {
   }
   try {
     const definitions = await fetchScriptDefinitions();
-    monaco.typescript.javascriptDefaults.addExtraLib(definitions, 'ts:rule-runner.d.ts');
+    monaco.typescript.javascriptDefaults.addExtraLib(definitions, 'file:///node_modules/@eveal/runtime/index.d.ts');
     extraLibLoaded = true;
   } catch {
     // type definitions are optional — the editor still works without autocomplete
   }
 };
 
-const props = defineProps<{ ledgerRefs?: string[] }>();
+export interface ScriptEditorScope {
+  ledgers?: string[];
+  characters?: string[];
+  corporations?: string[];
+  walletDivisions?: string[];
+}
 
-let ledgersLib: monaco.IDisposable | undefined;
+const props = defineProps<{ scope?: ScriptEditorScope }>();
 
-const updateLedgerRefs = (refs: readonly string[]) => {
-  ledgersLib?.dispose();
+let scopeLib: monaco.IDisposable | undefined;
+
+const declareInterface = (name: string, type: string, refs: readonly string[]) => {
   const members = refs
       .filter(ref => ref && ref !== 'system')
-      .map(ref => `    readonly ${JSON.stringify(ref)}: Ledger;`)
+      .map(ref => `        readonly ${JSON.stringify(ref)}: ${type};`)
       .join('\n');
-  ledgersLib = monaco.typescript.javascriptDefaults.addExtraLib(
-      `declare interface Ledgers {\n${members}\n}\n`,
-      'ts:rule-runner.ledgers.d.ts'
-  );
+  return `    interface ${name} {\n${members}\n    }\n`;
+};
+
+const updateScope = (scope: ScriptEditorScope) => {
+  scopeLib?.dispose();
+  const source = `declare module '@eveal/runtime' {\n${[
+    declareInterface('Ledgers', 'Ledger', scope.ledgers ?? []),
+    declareInterface('Characters', 'Character', scope.characters ?? []),
+    declareInterface('Corporations', 'Corporation', scope.corporations ?? []),
+    declareInterface('WalletDivisions', 'WalletDivision', scope.walletDivisions ?? []),
+  ].join('\n')}}\n`;
+  scopeLib = monaco.typescript.javascriptDefaults.addExtraLib(source, 'ts:rule-runner.scope.d.ts');
 };
 
 const model = defineModel<string>({default: ''});
@@ -51,7 +65,7 @@ let editor: monaco.editor.IStandaloneCodeEditor | undefined;
 
 onMounted(async () => {
   await loadScriptDefinitions();
-  updateLedgerRefs(props.ledgerRefs ?? []);
+  updateScope(props.scope ?? {});
 
   if (!container.value) {
     return;
@@ -83,11 +97,11 @@ watch(model, value => {
   }
 });
 
-watch(() => props.ledgerRefs, refs => updateLedgerRefs(refs ?? []), {deep: true});
+watch(() => props.scope, scope => updateScope(scope ?? {}), {deep: true});
 
 onBeforeUnmount(() => {
   editor?.dispose();
-  ledgersLib?.dispose();
+  scopeLib?.dispose();
 });
 </script>
 
diff --git a/src/rules/rules.ts b/src/rules/rules.ts
index e82b896..a46ba0a 100644
--- a/src/rules/rules.ts
+++ b/src/rules/rules.ts
@@ -1,10 +1,19 @@
 import {ruleBookApi, ruleScriptApi} from "@/mammon";
-import {RuleBookResponse, UpdateRuleBookRequest} from "@/generated/mammon";
+import {RuleBookResponse, RuleScopeRequest, RuleScriptRequest, RuleScriptResponse, UpdateRuleBookRequest} from "@/generated/mammon";
 import {isAxiosError} from "axios";
 import {defineStore} from "pinia";
 import {ref} from "vue";
 
 export type RuleBook = RuleBookResponse;
+export type RuleScript = RuleScriptResponse;
+export type RuleScope = RuleScriptResponse['scope'];
+
+export const emptyScope = (): RuleScopeRequest => ({
+    ledgers: {},
+    characters: {},
+    corporations: {},
+    walletDivisions: {},
+});
 
 export const useRuleBookStore = defineStore('rule-book', () => {
     const ruleBook = ref<RuleBook | null>(null);
@@ -19,7 +28,7 @@ export const useRuleBookStore = defineStore('rule-book', () => {
             throw error;
         });
 
-    const update = (request: UpdateRuleBookRequest) => ruleBookApi.updateRuleBook(request)
+    const update = (scripts: RuleScriptRequest[]) => ruleBookApi.updateRuleBook({scripts} satisfies UpdateRuleBookRequest)
         .then(response => ruleBook.value = response.data);
 
     refresh();
@@ -28,4 +37,8 @@ export const useRuleBookStore = defineStore('rule-book', () => {
 })
 
 export const fetchScriptDefinitions = (): Promise<string> =>
-    ruleScriptApi.getScriptDefinitions({responseType: 'text'}).then(response => response.data);
\ No newline at end of file
+    ruleScriptApi.listScriptDefinitions()
+        .then(response => Promise.all(
+            response.data.map(name => ruleScriptApi.getScriptDefinition(name, {responseType: 'text'}).then(r => r.data))
+        ))
+        .then(definitions => definitions.join('\n'));