Add extracted source directory and README navigation

extracted-source/node_modules/@anthropic-ai/vertex-sdk/internal/headers.mjs

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+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+import { isReadonlyArray } from "./utils/values.mjs";
+const brand_privateNullableHeaders = Symbol.for('brand.privateNullableHeaders');
+function* iterateHeaders(headers) {
+    if (!headers)
+        return;
+    if (brand_privateNullableHeaders in headers) {
+        const { values, nulls } = headers;
+        yield* values.entries();
+        for (const name of nulls) {
+            yield [name, null];
+        }
+        return;
+    }
+    let shouldClear = false;
+    let iter;
+    if (headers instanceof Headers) {
+        iter = headers.entries();
+    }
+    else if (isReadonlyArray(headers)) {
+        iter = headers;
+    }
+    else {
+        shouldClear = true;
+        iter = Object.entries(headers ?? {});
+    }
+    for (let row of iter) {
+        const name = row[0];
+        if (typeof name !== 'string')
+            throw new TypeError('expected header name to be a string');
+        const values = isReadonlyArray(row[1]) ? row[1] : [row[1]];
+        let didClear = false;
+        for (const value of values) {
+            if (value === undefined)
+                continue;
+            // Objects keys always overwrite older headers, they never append.
+            // Yield a null to clear the header before adding the new values.
+            if (shouldClear && !didClear) {
+                didClear = true;
+                yield [name, null];
+            }
+            yield [name, value];
+        }
+    }
+}
+export const buildHeaders = (newHeaders) => {
+    const targetHeaders = new Headers();
+    const nullHeaders = new Set();
+    for (const headers of newHeaders) {
+        const seenHeaders = new Set();
+        for (const [name, value] of iterateHeaders(headers)) {
+            const lowerName = name.toLowerCase();
+            if (!seenHeaders.has(lowerName)) {
+                targetHeaders.delete(name);
+                seenHeaders.add(lowerName);
+            }
+            if (value === null) {
+                targetHeaders.delete(name);
+                nullHeaders.add(lowerName);
+            }
+            else {
+                targetHeaders.append(name, value);
+                nullHeaders.delete(lowerName);
+            }
+        }
+    }
+    return { [brand_privateNullableHeaders]: true, values: targetHeaders, nulls: nullHeaders };
+};
+export const isEmptyHeaders = (headers) => {
+    for (const _ of iterateHeaders(headers))
+        return false;
+    return true;
+};
+//# sourceMappingURL=headers.mjs.map

extracted-source/node_modules/@anthropic-ai/vertex-sdk/internal/utils/env.mjs

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+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+/**
+ * Read an environment variable.
+ *
+ * Trims beginning and trailing whitespace.
+ *
+ * Will return undefined if the environment variable doesn't exist or cannot be accessed.
+ */
+export const readEnv = (env) => {
+    if (typeof globalThis.process !== 'undefined') {
+        return globalThis.process.env?.[env]?.trim() ?? undefined;
+    }
+    if (typeof globalThis.Deno !== 'undefined') {
+        return globalThis.Deno.env?.get?.(env)?.trim();
+    }
+    return undefined;
+};
+//# sourceMappingURL=env.mjs.map

extracted-source/node_modules/@anthropic-ai/vertex-sdk/internal/utils/values.mjs

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+// File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
+import { AnthropicError } from "../../core/error.mjs";
+// https://url.spec.whatwg.org/#url-scheme-string
+const startsWithSchemeRegexp = /^[a-z][a-z0-9+.-]*:/i;
+export const isAbsoluteURL = (url) => {
+    return startsWithSchemeRegexp.test(url);
+};
+export let isArray = (val) => ((isArray = Array.isArray), isArray(val));
+export let isReadonlyArray = isArray;
+/** Returns an object if the given value isn't an object, otherwise returns as-is */
+export function maybeObj(x) {
+    if (typeof x !== 'object') {
+        return {};
+    }
+    return x ?? {};
+}
+// https://stackoverflow.com/a/34491287
+export function isEmptyObj(obj) {
+    if (!obj)
+        return true;
+    for (const _k in obj)
+        return false;
+    return true;
+}
+// https://eslint.org/docs/latest/rules/no-prototype-builtins
+export function hasOwn(obj, key) {
+    return Object.prototype.hasOwnProperty.call(obj, key);
+}
+export function isObj(obj) {
+    return obj != null && typeof obj === 'object' && !Array.isArray(obj);
+}
+export const ensurePresent = (value) => {
+    if (value == null) {
+        throw new AnthropicError(`Expected a value to be given but received ${value} instead.`);
+    }
+    return value;
+};
+export const validatePositiveInteger = (name, n) => {
+    if (typeof n !== 'number' || !Number.isInteger(n)) {
+        throw new AnthropicError(`${name} must be an integer`);
+    }
+    if (n < 0) {
+        throw new AnthropicError(`${name} must be a positive integer`);
+    }
+    return n;
+};
+export const coerceInteger = (value) => {
+    if (typeof value === 'number')
+        return Math.round(value);
+    if (typeof value === 'string')
+        return parseInt(value, 10);
+    throw new AnthropicError(`Could not coerce ${value} (type: ${typeof value}) into a number`);
+};
+export const coerceFloat = (value) => {
+    if (typeof value === 'number')
+        return value;
+    if (typeof value === 'string')
+        return parseFloat(value);
+    throw new AnthropicError(`Could not coerce ${value} (type: ${typeof value}) into a number`);
+};
+export const coerceBoolean = (value) => {
+    if (typeof value === 'boolean')
+        return value;
+    if (typeof value === 'string')
+        return value === 'true';
+    return Boolean(value);
+};
+export const maybeCoerceInteger = (value) => {
+    if (value == null) {
+        return undefined;
+    }
+    return coerceInteger(value);
+};
+export const maybeCoerceFloat = (value) => {
+    if (value == null) {
+        return undefined;
+    }
+    return coerceFloat(value);
+};
+export const maybeCoerceBoolean = (value) => {
+    if (value == null) {
+        return undefined;
+    }
+    return coerceBoolean(value);
+};
+export const safeJSON = (text) => {
+    try {
+        return JSON.parse(text);
+    }
+    catch (err) {
+        return undefined;
+    }
+};
+//# sourceMappingURL=values.mjs.map