Respect proxy variables throughout the daemon (#8177)

* fix(server): respect environment proxies across daemon traffic Install proxy routing at daemon and plugin process startup, with a separate HTTP agent for outbound WebSockets. Always exempt loopback so local provider bridges remain reachable. * test(server): run usage source regressions in CI * fix(server): validate proxy settings without blocking startup Normalize scheme-less proxies and share HTTP-only validation across fetch and WebSockets. Record ignored variables without credentials in the daemon log. Separate built-in and directory plugin regressions through a typed fixture. * refactor(server): treat ignored proxy variables as unset * fix(server): read Windows proxy environment entries once * fix(server): apply proxy policy to connected host links * test(server): isolate proxy fixture credential directories * fix(server): keep proxy routing and authentication consistent Normalize Windows environment names and wildcard bypass rules at the network boundary. Compare bypass ports numerically and keep Basic proxy credentials on the CONNECT pool, including empty credential fields.
2026-10-30 21:23:04 +00:00 · 2026-10-30 17:57:57 +07:00
parent 385c29b655
commit 787edb1bf9
13 changed files with 628 additions and 8 deletions
@@ -493,6 +493,16 @@ The supervisor alone publishes its ready worker's endpoint in `paseo.pid`, clear

 Worker restart retains supervisor arguments/environment and rereads the configuration file. Updating a package and observing its new worker version do not refresh the running supervisor code; the launcher owns full-process replacement. See [CLI lifecycle contracts](../public-docs/cli.md#daemon-management).

+## Outbound networking
+
+The daemon and its plugin processes honor `HTTPS_PROXY`, `HTTP_PROXY`, and `NO_PROXY`
+(including lowercase forms, which take precedence). Fetch and relay, Hub, and connected-host WebSockets
+share this policy. Loopback (`localhost`, `127.0.0.1`, `::1`) always goes direct.
+A proxy without a scheme uses HTTP. Invalid values and unsupported proxy schemes
+are treated as unset, with one warning naming the variable in `daemon.log`.
+Agent and terminal environments are unchanged. System proxy settings and SOCKS-only
+`ALL_PROXY` configurations are not supported.
+
 ## Deployment models

 1. **Local daemon** (default): `paseo daemon start` on `127.0.0.1:6767`
@@ -40690,6 +40690,7 @@
        "esbuild": "^0.25.12",
        "express": "^4.18.2",
        "fast-deep-equal": "^3.1.3",
+        "https-proxy-agent": "^7.0.6",
        "lru-cache": "^11.5.1",
        "markdown-it": "^10.0.0",
        "mnemonic-id": "^3.2.7",
@@ -40707,6 +40708,7 @@
        "strip-ansi": "^7.1.2",
        "tree-kill": "^1.2.2",
        "typescript": "^5.9.3",
+        "undici": "^7.24.8",
        "uuid": "^9.0.1",
        "which": "^5.0.0",
        "ws": "^8.14.2",
@@ -41280,6 +41282,15 @@
        "url": "https://opencollective.com/vitest"
      }
    },
+    "packages/server/node_modules/agent-base": {
+      "version": "7.1.4",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-7.1.4.tgz",
+      "integrity": "sha512-MnA+YT8fwfJPgBx3m60MNqakm30XOkyIoH1y6huTQvC0PwZG7ki8NacLBcrPbNoo8vEZy7Jpuk7+jMO+CUovTQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14"
+      }
+    },
    "packages/server/node_modules/ajv": {
      "version": "8.20.0",
      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.20.0.tgz",
@@ -41349,6 +41360,19 @@
        "@esbuild/win32-x64": "0.25.12"
      }
    },
+    "packages/server/node_modules/https-proxy-agent": {
+      "version": "7.0.6",
+      "resolved": "https://registry.npmjs.org/https-proxy-agent/-/https-proxy-agent-7.0.6.tgz",
+      "integrity": "sha512-vK9P5/iUfdl95AI+JVyUuIcVtd4ofvtrOr3HNtM2yxC9bnMbEdp3x01OhQNnjb8IJYi38VlTE3mBXwcfvywuSw==",
+      "license": "MIT",
+      "dependencies": {
+        "agent-base": "^7.1.2",
+        "debug": "4"
+      },
+      "engines": {
+        "node": ">= 14"
+      }
+    },
    "packages/server/node_modules/isexe": {
      "version": "3.1.5",
      "resolved": "https://registry.npmjs.org/isexe/-/isexe-3.1.5.tgz",
@@ -2,6 +2,7 @@ export { createHostChannelTransport } from "../hosts/index.js";
 import { HostTransportBudget } from "./buffering.js";
 export { HostTransportBudget } from "./buffering.js";
 import { homedir } from "node:os";
+import type { Agent } from "node:http";
 import { WebSocket } from "ws";
 import { parseHostTarget, type HostTarget } from "@getpaseo/protocol/host-target";
 import { createSshTunnel, type SshTunnel } from "./ssh-tunnel.js";
@@ -19,10 +20,15 @@ export { parseHostTarget };
 export type { SshTunnel } from "./ssh-tunnel.js";
 export { createSshTunnel, resolveSshFailureDetail } from "./ssh-tunnel.js";

+export interface HostTransportOptions {
+  webSocketAgent?: (url: string) => Agent | undefined;
+}
+
 /** A factory owns one attempt, including a fresh SSH process and its teardown. */
 export function createHostTransportFactory(
  connection: string,
  budget = new HostTransportBudget(),
+  options: HostTransportOptions = {},
 ): DaemonTransportFactory {
  const target = parseHostTarget(connection);
  // Rises to "protected" once the daemon negotiates it, so a later attempt
@@ -68,12 +74,13 @@ export function createHostTransportFactory(
        return;
      }
      const socketPath = socketTarget.socketPath?.replace(/^~(?=\/)/, homedir());
-      let factory = createWebSocketTransportFactory((url, options) => {
+      let factory = createWebSocketTransportFactory((url, socketOptions) => {
        const socket = new WebSocket(
          socketPath && url.startsWith("ws+unix:") ? `ws+unix://${socketPath}:/ws` : url,
-          options?.protocols,
+          socketOptions?.protocols,
          {
-            headers: options?.headers,
+            headers: socketOptions?.headers,
+            agent: socketPath ? undefined : options.webSocketAgent?.(url),
            ...(socketPath ? { socketPath } : {}),
            maxPayload: 100 * 1024 * 1024,
          },
@@ -191,14 +198,15 @@ export function createHostTransportFactory(
 }
 export function createHostClient(
  connection: string,
-  config: Omit<DaemonClientConfig, "url" | "transportFactory">,
+  config: Omit<DaemonClientConfig, "url" | "transportFactory"> & HostTransportOptions,
  budget?: HostTransportBudget,
 ): DaemonClient {
  const target = parseHostTarget(connection);
+  const { webSocketAgent, ...clientConfig } = config;
  return new DaemonClient({
-    ...config,
+    ...clientConfig,
    url: "ws://host-connector/ws",
    ...(target.password ? { password: target.password } : {}),
-    transportFactory: createHostTransportFactory(connection, budget),
+    transportFactory: createHostTransportFactory(connection, budget, { webSocketAgent }),
  });
 }
@@ -89,7 +89,7 @@
    "speech:transcribe:local": "tsx scripts/transcribe-local-wav.ts",
    "test": "npm run test:unit && npm run test:integration",
    "test:unit": "vitest run --fileParallelism --exclude \"**/*.e2e.test.ts\"",
-    "test:integration": "vitest run --maxWorkers=1 src/server/git-filename-diffs.e2e.test.ts src/server/daemon-e2e/checkout-diff-content.e2e.test.ts src/server/daemon-e2e/filesystem.e2e.test.ts src/server/daemon-e2e/file-download.e2e.test.ts src/server/daemon-e2e/cli-logs-follow.e2e.test.ts src/server/creation/creation.e2e.test.ts src/server/daemon-e2e/terminal-workspace-sdk.e2e.test.ts src/server/daemon-e2e/terminal-worker-lifecycle.e2e.test.ts src/server/workspace-create-worktree-source.e2e.test.ts src/server/daemon-e2e/models.e2e.test.ts src/server/daemon-e2e/live-preferences.e2e.test.ts src/server/daemon-e2e/oversized-message.e2e.test.ts src/server/agent/model-catalog.e2e.test.ts src/server/plugins/plugin-paseo-api.e2e.test.ts src/server/plugins/lifecycle.e2e.test.ts src/server/connected-hosts/hosts.e2e.test.ts src/server/owned-subscriptions.e2e.test.ts && vitest run --maxWorkers=1 src/server/agent/providers/omp/history.e2e.test.ts src/server/daemon-e2e/git-operations.e2e.test.ts src/server/session.create-agent-worktree-autoarchive.e2e.test.ts src/server/agent/providers/opencode-bridge.local.e2e.test.ts src/server/daemon-e2e/relay-transport.e2e.test.ts -t \"merges into|creates a worktree and auto-archives both|versioned runtime|oversized attachments|connected hosts|password-protected daemon refuses|replays selected OMP history\"",
+    "test:integration": "vitest run --maxWorkers=1 src/server/git-filename-diffs.e2e.test.ts src/server/daemon-e2e/checkout-diff-content.e2e.test.ts src/server/daemon-e2e/filesystem.e2e.test.ts src/server/daemon-e2e/file-download.e2e.test.ts src/server/daemon-e2e/cli-logs-follow.e2e.test.ts src/server/creation/creation.e2e.test.ts src/server/daemon-e2e/terminal-workspace-sdk.e2e.test.ts src/server/daemon-e2e/terminal-worker-lifecycle.e2e.test.ts src/server/workspace-create-worktree-source.e2e.test.ts src/server/daemon-e2e/models.e2e.test.ts src/server/daemon-e2e/live-preferences.e2e.test.ts src/server/daemon-e2e/oversized-message.e2e.test.ts src/server/agent/model-catalog.e2e.test.ts src/server/plugins/plugin-paseo-api.e2e.test.ts src/server/plugins/usage-sources.e2e.test.ts src/server/plugins/lifecycle.e2e.test.ts src/server/connected-hosts/hosts.e2e.test.ts src/server/owned-subscriptions.e2e.test.ts && vitest run --maxWorkers=1 src/server/agent/providers/omp/history.e2e.test.ts src/server/daemon-e2e/git-operations.e2e.test.ts src/server/session.create-agent-worktree-autoarchive.e2e.test.ts src/server/agent/providers/opencode-bridge.local.e2e.test.ts src/server/daemon-e2e/relay-transport.e2e.test.ts -t \"merges into|creates a worktree and auto-archives both|versioned runtime|oversized attachments|connected hosts|password-protected daemon refuses|replays selected OMP history\"",
    "test:hub-cli-contract": "vitest run --maxWorkers=1 src/server/hub/hub-cli-contract.test.ts",
    "test:integration:all": "npm run test:e2e",
    "test:integration:real": "vitest run real.e2e.test.ts",
@@ -124,6 +124,7 @@
    "esbuild": "^0.25.12",
    "express": "^4.18.2",
    "fast-deep-equal": "^3.1.3",
+    "https-proxy-agent": "^7.0.6",
    "lru-cache": "^11.5.1",
    "markdown-it": "^10.0.0",
    "mnemonic-id": "^3.2.7",
@@ -141,6 +142,7 @@
    "strip-ansi": "^7.1.2",
    "tree-kill": "^1.2.2",
    "typescript": "^5.9.3",
+    "undici": "^7.24.8",
    "uuid": "^9.0.1",
    "which": "^5.0.0",
    "ws": "^8.14.2",
@@ -21,6 +21,7 @@ import {
  type HostUpdate,
 } from "@getpaseo/protocol/hosts";
 import type { DaemonPermission, WSHelloMessage } from "@getpaseo/protocol/messages";
+import { webSocketProxyAgent } from "../network/index.js";

 export class HostError extends Error {
  constructor(
@@ -242,6 +243,7 @@ export class ConnectedHosts {
      {
        clientId: `host-link-${this.self.serverId}-${row.registrationId}`,
        connectTimeoutMs: 10000,
+        webSocketAgent: webSocketProxyAgent,
      },
      this.budget,
    );
@@ -1,5 +1,6 @@
 import { appendFileSync, mkdirSync } from "node:fs";
 import path from "node:path";
+import { initializeEnvironmentProxy } from "./network/index.js";
 import { createPaseoDaemon, formatListenTarget } from "./bootstrap.js";
 import { loadConfig } from "./config.js";
 import { resolvePaseoHome } from "./paseo-home.js";
@@ -132,6 +133,11 @@ function applyCliFlagOverrides(config: ReturnType<typeof loadConfig>): void {

 async function main() {
  const { paseoHome, logger, config } = bootstrapFromEnvironment();
+  for (const variable of initializeEnvironmentProxy()) {
+    writeWorkerLifecycleLog(paseoHome, "Ignoring invalid or unsupported HTTP proxy variable", {
+      variable,
+    });
+  }
  let daemon: Awaited<ReturnType<typeof createPaseoDaemon>> | null = null;
  let shutdownPromise: Promise<number> | null = null;
  let exitHookInstalled = false;
@@ -1,5 +1,6 @@
 import { WebSocket } from "ws";
 import { z } from "zod";
+import { webSocketProxyAgent } from "../network/index.js";
 import type { WebSocketLike } from "../websocket-server.js";

 const SOCKET_PING_INTERVAL_MS = 10_000;
@@ -166,6 +167,7 @@ export class DirectHubRelationshipRemote implements HubRelationshipRemote {
  openSocket(input: HubSocketCredentials, events: HubSocketEvents): HubSocketConnection {
    let sessionProtocol: "legacy" | "session-v1" = "legacy";
    const socket = new WebSocket(input.webSocketUrl, {
+      agent: webSocketProxyAgent(input.webSocketUrl),
      handshakeTimeout: this.requestTimeoutMs,
      headers: {
        authorization: `Bearer ${input.credential}`,
@@ -0,0 +1,116 @@
+import type { Agent } from "node:http";
+import { EnvHttpProxyAgent, Pool, setGlobalDispatcher } from "undici";
+import { HttpsProxyAgent } from "https-proxy-agent";
+
+interface ProxyEnvironment {
+  httpProxy: string;
+  httpsProxy: string;
+  noProxy: string;
+}
+
+let environment = readEnvironment(process.env, process.platform).environment;
+
+function readEnvironment(
+  env: NodeJS.ProcessEnv,
+  platform: NodeJS.Platform,
+): {
+  environment: ProxyEnvironment;
+  ignored: string[];
+} {
+  // process.env lookups are case-insensitive on Windows. Read each actual entry once.
+  const values = new Map(
+    Object.entries(env).map(([name, value]) => [
+      platform === "win32" ? name.toLowerCase() : name,
+      value,
+    ]),
+  );
+  const ignored: string[] = [];
+  function proxy(variable: string): string | undefined {
+    const value = values.get(variable);
+    if (value === undefined) return undefined;
+    if (!value.trim()) return undefined;
+    try {
+      const url = new URL(value.includes("://") ? value : `http://${value}`);
+      if (url.protocol !== "http:" && url.protocol !== "https:")
+        throw new Error("Unsupported proxy protocol");
+      decodeURIComponent(url.username);
+      decodeURIComponent(url.password);
+      return url.href;
+    } catch {
+      ignored.push(variable);
+      return undefined;
+    }
+  }
+  const httpProxy = proxy("http_proxy") ?? proxy("HTTP_PROXY") ?? "";
+  return {
+    environment: {
+      httpProxy,
+      httpsProxy: proxy("https_proxy") ?? proxy("HTTPS_PROXY") ?? httpProxy,
+      noProxy: values.get("no_proxy") ?? values.get("NO_PROXY") ?? "",
+    },
+    ignored,
+  };
+}
+
+function bypassList(noProxy: string): string {
+  return noProxy.split(/[,\s]+/).includes("*") ? "*" : `${noProxy},localhost,127.0.0.1,[::1],::1`;
+}
+
+function proxyClient(origin: URL, options: object) {
+  const pool = new Pool(origin, options);
+  if (!origin.username && !origin.password) return pool;
+  const credentials = `${decodeURIComponent(origin.username)}:${decodeURIComponent(origin.password)}`;
+  const authorization = `Basic ${Buffer.from(credentials).toString("base64")}`;
+  // This pool only sends CONNECT requests to this proxy, never requests to the origin.
+  // undici's URL auth requires both fields; HTTP Basic also permits either field to be empty.
+  return pool.compose(
+    (dispatch) => (request, handler) =>
+      dispatch(
+        {
+          ...request,
+          headers: { ...request.headers, "proxy-authorization": authorization },
+        },
+        handler,
+      ),
+  );
+}
+
+/** Install once at startup; return ignored variable names for logging without exposing credentials. */
+export function initializeEnvironmentProxy(
+  env: NodeJS.ProcessEnv = process.env,
+  platform: NodeJS.Platform = process.platform,
+): string[] {
+  const resolved = readEnvironment(env, platform);
+  environment = resolved.environment;
+  setGlobalDispatcher(
+    new EnvHttpProxyAgent({
+      httpProxy: environment.httpProxy,
+      httpsProxy: environment.httpsProxy,
+      noProxy: bypassList(environment.noProxy),
+      clientFactory: proxyClient,
+    }),
+  );
+  return resolved.ignored;
+}
+
+/** ws uses Node HTTP agents rather than the fetch dispatcher. */
+export function webSocketProxyAgent(address: string): Agent | undefined {
+  const url = new URL(address);
+  const hostname = url.hostname.toLowerCase();
+  const port = url.port || (url.protocol === "wss:" ? "443" : "80");
+  const entries = bypassList(environment.noProxy)
+    .toLowerCase()
+    .split(/[,\s]+/);
+  if (
+    entries.some((entry) => {
+      if (entry === "*") return true;
+      const match = entry.match(/^(.+):(\d+)$/);
+      if (match && Number(match[2]) !== Number(port)) return false;
+      const host = (match ? match[1]! : entry).replace(/^\*?\./, "");
+      return host !== "" && (hostname === host || hostname.endsWith(`.${host}`));
+    })
+  )
+    return undefined;
+  const proxy = url.protocol === "wss:" ? environment.httpsProxy : environment.httpProxy;
+  return proxy ? new HttpsProxyAgent(proxy) : undefined;
+}
@@ -0,0 +1,341 @@
+import { fork } from "node:child_process";
+import { mkdtemp, readFile, rm } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { createServer, type Server } from "node:http";
+import { once } from "node:events";
+import { connect } from "node:net";
+import { afterEach, expect, test } from "vitest";
+import { WebSocket, WebSocketServer } from "ws";
+import { getGlobalDispatcher, setGlobalDispatcher } from "undici";
+import { initializeEnvironmentProxy, webSocketProxyAgent } from "./index.js";
+import { ConnectedHosts } from "../connected-hosts/index.js";
+const original = getGlobalDispatcher();
+const servers: Server[] = [];
+afterEach(async () => {
+  const installed = getGlobalDispatcher();
+  setGlobalDispatcher(original);
+  if (installed !== original) await installed.close();
+  await Promise.all(
+    servers.splice(0).map(
+      (server) =>
+        new Promise<void>((resolve) => {
+          server.closeAllConnections();
+          server.close(() => resolve());
+        }),
+    ),
+  );
+});
+async function listen(server: Server) {
+  servers.push(server);
+  server.listen(0, "127.0.0.1");
+  await once(server, "listening");
+  const address = server.address();
+  if (!address || typeof address === "string") throw new Error("Missing address");
+  return `127.0.0.1:${address.port}`;
+}
+async function proxy() {
+  const tunnels: string[] = [];
+  const server = createServer();
+  server.on("connect", (request, socket) => {
+    tunnels.push(request.url!);
+    socket.end("HTTP/1.1 502 Bad Gateway\r\nConnection: close\r\n\r\n");
+  });
+  return { url: `http://${await listen(server)}`, tunnels };
+}
+test("loopback fetch and WebSockets bypass HTTP_PROXY with empty NO_PROXY", async () => {
+  const recorder = await proxy();
+  initializeEnvironmentProxy({ HTTP_PROXY: recorder.url, NO_PROXY: "" });
+  const server = createServer((_, response) => response.end("direct"));
+  const sockets = new WebSocketServer({ server });
+  sockets.on("connection", (socket) => socket.send("direct"));
+  const address = await listen(server);
+  expect(await (await fetch(`http://${address}`)).text()).toBe("direct");
+  const socket = new WebSocket(`ws://${address}`, {
+    agent: webSocketProxyAgent(`ws://${address}`),
+  });
+  expect((await once(socket, "message"))[0].toString()).toBe("direct");
+  socket.close();
+  await once(socket, "close");
+  await new Promise<void>((resolve) => sockets.close(() => resolve()));
+  for (const host of ["localhost", "127.0.0.1", "[::1]"])
+    expect(webSocketProxyAgent(`wss://${host}:1234`)).toBeUndefined();
+  expect(recorder.tunnels).toEqual([]);
+});
+test("fetch and WebSockets send non-loopback traffic through CONNECT", async () => {
+  const recorder = await proxy();
+  initializeEnvironmentProxy({ http_proxy: recorder.url });
+  await expect(
+    fetch("https://vendor.invalid/", { signal: AbortSignal.timeout(500) }),
+  ).rejects.toThrow();
+  const socket = new WebSocket("wss://vendor.invalid", {
+    agent: webSocketProxyAgent("wss://vendor.invalid"),
+  });
+  await once(socket, "error");
+  expect(
+    recorder.tunnels.filter((host) => host === "vendor.invalid:443").length,
+  ).toBeGreaterThanOrEqual(2);
+});
+test("NO_PROXY and absent variables keep matching WebSockets direct", async () => {
+  const recorder = await proxy();
+  initializeEnvironmentProxy({
+    HTTPS_PROXY: recorder.url,
+    NO_PROXY: "vendor.invalid,.example.invalid:443",
+  });
+  expect(webSocketProxyAgent("wss://vendor.invalid")).toBeUndefined();
+  await expect(
+    fetch("https://vendor.invalid/", { signal: AbortSignal.timeout(500) }),
+  ).rejects.toThrow();
+  expect(webSocketProxyAgent("wss://sub.example.invalid")).toBeUndefined();
+  expect(webSocketProxyAgent("wss://example.invalid:444")).toBeDefined();
+  initializeEnvironmentProxy({ HTTP_PROXY: recorder.url, no_proxy: "*" });
+  expect(webSocketProxyAgent("ws://vendor.invalid")).toBeUndefined();
+  initializeEnvironmentProxy({});
+  expect(webSocketProxyAgent("wss://vendor.invalid")).toBeUndefined();
+  const address = await listen(createServer((_, response) => response.end("direct")));
+  expect(await (await fetch(`http://${address}`)).text()).toBe("direct");
+  expect(recorder.tunnels).toEqual([]);
+});
+
+test.each(["127.0.0.1", "localhost"])(
+  "scheme-less %s proxies work for fetch and WebSockets",
+  async (host) => {
+    const recorder = await proxy();
+    const address = new URL(recorder.url);
+    initializeEnvironmentProxy({ https_proxy: `${host}:${address.port}` });
+    await expect(
+      fetch("https://vendor.invalid", { signal: AbortSignal.timeout(500) }),
+    ).rejects.toThrow();
+    const socket = new WebSocket("wss://vendor.invalid", {
+      agent: webSocketProxyAgent("wss://vendor.invalid"),
+    });
+    await once(socket, "error");
+    expect(recorder.tunnels).toContain("vendor.invalid:443");
+  },
+);
+
+test.each([
+  "http://[",
+  "http://user%zz:secret@proxy.corp",
+  "socks5://127.0.0.1:7890",
+  "ftp://proxy.corp:8080",
+])("ignores invalid or unsupported proxy %s without stopping startup", async (value) => {
+  const recorder = await proxy();
+  expect(initializeEnvironmentProxy({ HTTP_PROXY: recorder.url, https_proxy: value })).toEqual([
+    "https_proxy",
+  ]);
+  expect(webSocketProxyAgent("wss://vendor.invalid")).toBeDefined();
+  await expect(
+    fetch("https://vendor.invalid", { signal: AbortSignal.timeout(500) }),
+  ).rejects.toThrow();
+  const socket = new WebSocket("wss://vendor.invalid", {
+    agent: webSocketProxyAgent("wss://vendor.invalid"),
+  });
+  await once(socket, "error");
+  expect(recorder.tunnels).toEqual(["vendor.invalid:443", "vendor.invalid:443"]);
+});
+
+test("daemon starts with an ignored proxy and writes one redacted warning to daemon.log", async () => {
+  const home = await mkdtemp(path.join(os.tmpdir(), "daemon-invalid-proxy-"));
+  const env = Object.fromEntries(
+    Object.entries(process.env).filter(
+      ([key]) => !["http_proxy", "https_proxy"].includes(key.toLowerCase()),
+    ),
+  );
+  const worker = fork(fileURLToPath(new URL("../daemon-worker.ts", import.meta.url)), [], {
+    execArgv: ["--import", "tsx"],
+    silent: true,
+    env: {
+      ...env,
+      PASEO_HOME: home,
+      HOME: home,
+      USERPROFILE: home,
+      PASEO_LISTEN: "127.0.0.1:0",
+      PASEO_RELAY_ENABLED: "0",
+      https_proxy: "socks5://private:secret@127.0.0.1:7890",
+    },
+  });
+  worker.stdout?.resume();
+  let stderr = "";
+  worker.stderr?.on("data", (chunk) => {
+    stderr += String(chunk);
+  });
+  try {
+    await new Promise<void>((resolve, reject) => {
+      worker.on("message", (message) => {
+        if (
+          typeof message === "object" &&
+          message !== null &&
+          "type" in message &&
+          message.type === "paseo:ready"
+        )
+          resolve();
+      });
+      worker.on("exit", (code) => reject(new Error(`Worker exited ${code}: ${stderr}`)));
+    });
+    const log = await readFile(path.join(home, "daemon.log"), "utf8");
+    const warnings = log
+      .split("\n")
+      .filter((line) => line.includes("Ignoring invalid or unsupported HTTP proxy variable"));
+    expect(warnings).toHaveLength(1);
+    expect(JSON.parse(warnings[0]!).variable).toBe("https_proxy");
+    expect(warnings[0]).not.toContain("secret");
+  } finally {
+    if (worker.exitCode === null && worker.signalCode === null) {
+      const exited = once(worker, "exit");
+      worker.kill("SIGTERM");
+      await exited;
+    }
+    await rm(home, { recursive: true, force: true });
+  }
+}, 60_000);
+
+test("accepts a scheme-less corporate proxy hostname", () => {
+  expect(initializeEnvironmentProxy({ https_proxy: "proxy.corp:8080" })).toEqual([]);
+  expect(webSocketProxyAgent("wss://vendor.invalid")).toBeDefined();
+});
+
+test("an ignored lowercase variable falls back to the uppercase variable", async () => {
+  const recorder = await proxy();
+  expect(
+    initializeEnvironmentProxy(
+      {
+        https_proxy: "socks5://proxy.invalid",
+        HTTPS_PROXY: recorder.url,
+      },
+      "linux",
+    ),
+  ).toEqual(["https_proxy"]);
+  await expect(
+    fetch("https://vendor.invalid", { signal: AbortSignal.timeout(500) }),
+  ).rejects.toThrow();
+  const socket = new WebSocket("wss://vendor.invalid", {
+    agent: webSocketProxyAgent("wss://vendor.invalid"),
+  });
+  await once(socket, "error");
+  expect(recorder.tunnels).toEqual(["vendor.invalid:443", "vendor.invalid:443"]);
+});
+
+test("case-insensitive environment access reports a variable only once", () => {
+  const env = new Proxy(
+    { https_proxy: "socks5://127.0.0.1:7890" },
+    {
+      get(target, key) {
+        return Reflect.get(target, typeof key === "string" ? key.toLowerCase() : key);
+      },
+    },
+  );
+  expect(initializeEnvironmentProxy(env)).toEqual(["https_proxy"]);
+});
+
+test("connected-host links send remote WebSockets through the environment proxy", async () => {
+  const recorder = await proxy();
+  initializeEnvironmentProxy({ HTTPS_PROXY: recorder.url });
+  const home = await mkdtemp(path.join(os.tmpdir(), "connected-host-proxy-"));
+  const hosts = new ConnectedHosts(home, { serverId: "self", label: "Self" });
+  try {
+    await hosts.add(
+      { connection: "wss://remote.invalid/ws" },
+      { sourceId: "test", manageSources: true },
+    );
+    await expect.poll(() => recorder.tunnels).toContain("remote.invalid:443");
+  } finally {
+    await hosts.close();
+    await rm(home, { recursive: true, force: true });
+  }
+});
+
+test.each(["corp.internal,*", "vendor.invalid:0443"])(
+  "fetch and WebSockets share NO_PROXY=%s",
+  async (noProxy) => {
+    const recorder = await proxy();
+    initializeEnvironmentProxy({ HTTPS_PROXY: recorder.url, NO_PROXY: noProxy });
+    expect(webSocketProxyAgent("wss://vendor.invalid")).toBeUndefined();
+    await expect(
+      fetch("https://vendor.invalid", { signal: AbortSignal.timeout(500) }),
+    ).rejects.toThrow();
+    expect(recorder.tunnels).toEqual([]);
+  },
+);
+
+test("Windows mixed-case environment names route and bypass both transports", async () => {
+  const recorder = await proxy();
+  // Windows preserves spelling but treats environment names without regard to case.
+  initializeEnvironmentProxy({ Https_Proxy: recorder.url, No_Proxy: "other.invalid" }, "win32");
+  expect(webSocketProxyAgent("wss://other.invalid")).toBeUndefined();
+  await expect(
+    fetch("https://other.invalid", { signal: AbortSignal.timeout(500) }),
+  ).rejects.toThrow();
+  expect(webSocketProxyAgent("wss://vendor.invalid")).toBeDefined();
+  await expect(
+    fetch("https://vendor.invalid", { signal: AbortSignal.timeout(500) }),
+  ).rejects.toThrow();
+  const socket = new WebSocket("wss://vendor.invalid", {
+    agent: webSocketProxyAgent("wss://vendor.invalid"),
+  });
+  await once(socket, "error");
+  expect(recorder.tunnels).toEqual(["vendor.invalid:443", "vendor.invalid:443"]);
+});
+
+test("POSIX mixed-case names do not override standard proxy names", async () => {
+  const recorder = await proxy();
+  initializeEnvironmentProxy(
+    { Https_Proxy: recorder.url, HTTPS_PROXY: recorder.url, No_Proxy: "*" },
+    "linux",
+  );
+  expect(webSocketProxyAgent("wss://vendor.invalid")).toBeDefined();
+  await expect(
+    fetch("https://vendor.invalid", { signal: AbortSignal.timeout(500) }),
+  ).rejects.toThrow();
+  expect(recorder.tunnels).toEqual(["vendor.invalid:443"]);
+});
+
+test("proxy credentials stay on CONNECT and do not reach the HTTP origin", async () => {
+  let originAuthorization: string | undefined;
+  const origin = createServer((request, response) => {
+    originAuthorization = request.headers["proxy-authorization"];
+    response.end("through proxy");
+  });
+  const originAddress = new URL(`http://${await listen(origin)}`);
+  const authorizations: (string | undefined)[] = [];
+  const server = createServer();
+  server.on("connect", (request, socket, head) => {
+    authorizations.push(request.headers["proxy-authorization"]);
+    const upstream = connect(Number(originAddress.port), "127.0.0.1", () => {
+      socket.write("HTTP/1.1 200 Connection Established\r\n\r\n");
+      if (head.length) upstream.write(head);
+      socket.pipe(upstream).pipe(socket);
+    });
+    socket.on("error", () => upstream.destroy());
+    upstream.on("error", () => socket.destroy());
+    socket.on("close", () => upstream.destroy());
+  });
+  initializeEnvironmentProxy({ HTTP_PROXY: `http://user:@${await listen(server)}` });
+  const response = await fetch("http://vendor.invalid", { signal: AbortSignal.timeout(3000) });
+  expect(await response.text()).toBe("through proxy");
+  expect(authorizations).toEqual([`Basic ${Buffer.from("user:").toString("base64")}`]);
+  expect(originAuthorization).toBeUndefined();
+});
+
+test.each(["user:@", ":secret@", "user:secret@"])(
+  "fetch and WebSockets authenticate proxy credentials %s",
+  async (credentials) => {
+    const authorizations: (string | undefined)[] = [];
+    const server = createServer();
+    server.on("connect", (request, socket) => {
+      authorizations.push(request.headers["proxy-authorization"]);
+      socket.end("HTTP/1.1 502 Bad Gateway\r\nConnection: close\r\n\r\n");
+    });
+    initializeEnvironmentProxy({ HTTPS_PROXY: `http://${credentials}${await listen(server)}` });
+    await expect(
+      fetch("https://vendor.invalid", { signal: AbortSignal.timeout(500) }),
+    ).rejects.toThrow();
+    const socket = new WebSocket("wss://vendor.invalid", {
+      agent: webSocketProxyAgent("wss://vendor.invalid"),
+    });
+    await once(socket, "error");
+    const expected = `Basic ${Buffer.from(credentials.slice(0, -1)).toString("base64")}`;
+    expect(authorizations).toEqual([expected, expected]);
+  },
+);
@@ -24,6 +24,7 @@ import { createPluginClientId } from "./plugin-session-identity.js";

 import { PluginSettingsStore } from "./settings/index.js";
 import { readPluginProviderIcon } from "./provider-icon.js";
+import { initializeEnvironmentProxy } from "../network/index.js";
 function describeError(error: unknown): string {
  return error instanceof Error ? error.message : String(error);
 }
@@ -606,6 +607,7 @@ if (process.argv[1] === fileURLToPath(import.meta.url)) {
    const parsed = PluginProcessRequestSchema.safeParse(raw);
    if (!worker && parsed.success && parsed.data.type === "initialize") {
      try {
+        initializeEnvironmentProxy();
        worker = createPluginWorker({ channel, contribute: evaluateBundle(parsed.data.bundle) });
      } catch (error) {
        channel.send({ type: "fatal", error: describeError(error) });
@@ -0,0 +1,31 @@
+import path from "node:path";
+import { initializeEnvironmentProxy } from "../../network/index.js";
+import { DaemonClient } from "../../test-utils/daemon-client.js";
+import { createTestPaseoDaemon } from "../../test-utils/paseo-daemon.js";
+import { BuiltinPluginLoader, resolveBuiltinPluginsRoot } from "../builtin/index.js";
+
+const mode = process.argv[2];
+if (mode !== "builtin" && mode !== "directory") throw new Error("Expected builtin or directory");
+const sources = ["claude-usage-source", "codex-usage-source"];
+// Built-ins run inside the daemon; directory plugins initialize their own subprocess network.
+if (mode === "builtin") initializeEnvironmentProxy();
+const daemon = await createTestPaseoDaemon({
+  pluginsEnabled: mode === "directory",
+  builtinPlugins: new BuiltinPluginLoader(
+    resolveBuiltinPluginsRoot(),
+    mode === "builtin" ? sources : [],
+  ),
+});
+const client = new DaemonClient({ url: `ws://127.0.0.1:${daemon.port}/ws` });
+try {
+  await client.connect();
+  if (mode === "directory") {
+    for (const source of sources) {
+      await client.installDirectoryPlugin(path.join(resolveBuiltinPluginsRoot(), source), source);
+    }
+  }
+  await client.listUsageReports();
+} finally {
+  await client.close();
+  await daemon.close();
+}
@@ -1,7 +1,11 @@
+import { execFile } from "node:child_process";
+import { promisify } from "node:util";
 import { cp, mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
 import { fileURLToPath, pathToFileURL } from "node:url";
+import { createServer } from "node:http";
+import { once } from "node:events";
 import { expect, test } from "vitest";
 import { DaemonClient } from "../test-utils/daemon-client.js";
 import { createTestPaseoDaemon } from "../test-utils/paseo-daemon.js";
@@ -335,3 +339,74 @@ export default function contribute(server) {
    await rm(root, { recursive: true, force: true });
  }
 }, 60_000);
+
+test.each(["builtin", "directory"])(
+  "%s usage plugins reach the environment proxy",
+  async (mode) => {
+    const root = await mkdtemp(path.join(os.tmpdir(), "usage-proxy-"));
+    const tunnels: string[] = [];
+    const proxy = createServer();
+    proxy.on("connect", (request, socket) => {
+      tunnels.push(request.url!);
+      socket.end("HTTP/1.1 502 Bad Gateway\r\nConnection: close\r\n\r\n");
+    });
+    proxy.listen(0, "127.0.0.1");
+    await once(proxy, "listening");
+    const address = proxy.address();
+    if (!address || typeof address === "string") throw new Error("Missing proxy address");
+    const guard = path.join(root, "network-guard.cjs");
+    // Prevent vendor DNS/network access even when proxy support is broken.
+    await writeFile(
+      guard,
+      `const dns = require('node:dns');
+const lookup = dns.lookup;
+dns.lookup = function(host, ...args) {
+  if (host === 'localhost' || host === '127.0.0.1' || host === '::1') return lookup.call(this, host, ...args);
+  args.at(-1)(Object.assign(new Error('External DNS forbidden in proxy test'), { code: 'ENOTFOUND' }));
+};`,
+    );
+    await mkdir(path.join(root, ".claude"));
+    await mkdir(path.join(root, ".codex"));
+    await writeFile(
+      path.join(root, ".claude", ".credentials.json"),
+      JSON.stringify({ claudeAiOauth: { accessToken: "fixture-claude" } }),
+    );
+    await writeFile(
+      path.join(root, ".codex", "auth.json"),
+      JSON.stringify({ tokens: { access_token: "fixture-codex", account_id: "fixture-account" } }),
+    );
+    try {
+      await promisify(execFile)(
+        process.execPath,
+        [
+          "--import",
+          "tsx",
+          fileURLToPath(new URL("./test-fixtures/usage-proxy-daemon.ts", import.meta.url)),
+          mode,
+        ],
+        {
+          timeout: 45_000,
+          maxBuffer: 1024 * 1024,
+          env: {
+            ...process.env,
+            HOME: root,
+            USERPROFILE: root,
+            CODEX_HOME: path.join(root, ".codex"),
+            CLAUDE_CONFIG_DIR: path.join(root, ".claude"),
+            NODE_OPTIONS: `--require=${JSON.stringify(guard.replaceAll("\\", "/"))}`,
+            https_proxy: `http://127.0.0.1:${address.port}`,
+            no_proxy: "",
+            NO_PROXY: "",
+          },
+        },
+      );
+      expect(tunnels).toContain("api.anthropic.com:443");
+      expect(tunnels).toContain("chatgpt.com:443");
+    } finally {
+      proxy.closeAllConnections();
+      await new Promise<void>((resolve) => proxy.close(() => resolve()));
+      await rm(root, { recursive: true, force: true });
+    }
+  },
+  60_000,
+);
@@ -2,6 +2,7 @@
 import { WebSocket } from "ws";
 import type pino from "pino";
 import { buildRelayWebSocketUrl } from "@getpaseo/protocol/daemon-endpoints";
+import { webSocketProxyAgent } from "./network/index.js";
 import type { ExternalSocketMetadata } from "./websocket-server.js";

 export interface RelayTransportOptions {
@@ -56,7 +57,7 @@ const RELAY_WEBSOCKET_OPTIONS = {
 } as const;

 function createDefaultRelayWebSocket(url: string): RelayWebSocketLike {
-  return new WebSocket(url, RELAY_WEBSOCKET_OPTIONS);
+  return new WebSocket(url, { ...RELAY_WEBSOCKET_OPTIONS, agent: webSocketProxyAgent(url) });
 }

 function isRecord(value: unknown): value is Record<string, unknown> {