diff --git a/packages/server/src/server/agent/provider-launch-config.ts b/packages/server/src/server/agent/provider-launch-config.ts
index b75a361fad..fddd83b626 100644
--- a/packages/server/src/server/agent/provider-launch-config.ts
+++ b/packages/server/src/server/agent/provider-launch-config.ts
@@ -3,7 +3,11 @@ import {
   executableExists,
   findExecutable,
 } from "../../executable-resolution/executable-resolution.js";
-import { createExternalProcessEnv, type ProcessEnvRecord } from "../paseo-env.js";
+import {
+  createExternalProcessEnv,
+  type ProcessEnvRecord,
+  type ExternalProcessEnv,
+} from "../paseo-env.js";
 export {
   AgentProviderRuntimeSettingsMapSchema,
   ProviderCommandSchema,
@@ -242,7 +246,7 @@ export function createProviderEnvSpec(options: ProviderEnvOptions = {}): Provide
   };
 }
 
-export function createProviderEnv(options: ProviderEnvOptions = {}): NodeJS.ProcessEnv {
+export function createProviderEnv(options: ProviderEnvOptions = {}): ExternalProcessEnv {
   const spec = createProviderEnvSpec(options);
   return createExternalProcessEnv(spec.baseEnv ?? process.env, spec.envOverlay);
 }
diff --git a/packages/server/src/server/agent/providers/opencode/v2/agent.test.ts b/packages/server/src/server/agent/providers/opencode/v2/agent.test.ts
index fd3ad3c25e..9a0e696e32 100644
--- a/packages/server/src/server/agent/providers/opencode/v2/agent.test.ts
+++ b/packages/server/src/server/agent/providers/opencode/v2/agent.test.ts
@@ -7,6 +7,83 @@ import { OpenCodeV2AgentClient } from "./agent.js";
 import { V2Harness } from "../test-utils/v2-harness.js";
 
 describe("OpenCode v2 session lifecycle", () => {
+  test("restores each same-directory agent environment on reconnect and resume", async () => {
+    const first = new V2Harness();
+    const second = new V2Harness();
+    first.info.id = "session-first";
+    second.info.id = "session-second";
+    const environments = new Map<string, Record<string, string>>();
+    const bind = async (input: { sessionID: string; variables: Record<string, string> }) => {
+      environments.set(input.sessionID, { ...input.variables });
+    };
+    first.api.session.environment = bind;
+    second.api.session.environment = bind;
+    const clients = [first, second].map(
+      (harness) =>
+        new OpenCodeV2AgentClient({
+          logger: createTestLogger(),
+          runtime: harness.runtime,
+          settings: {
+            env: {
+              PASEO_ENV_TEST: "configured",
+              PASEO_AGENT_ID: "configured",
+              ELECTRON_RUN_AS_NODE: "1",
+              PASEO_SUPERVISED: "1",
+              CLAUDECODE: "1",
+            },
+          },
+        }),
+    );
+    const config = { provider: "opencode" as const, cwd: "/tmp/project" };
+    const launches = ["first", "second"].map((id) => ({
+      env: { PASEO_AGENT_ID: id, PASEO_AGENT_CWD: config.cwd },
+    }));
+    const assertEnvironment = (index: number) => {
+      const env = environments.get([first, second][index].info.id);
+      expect(env?.PATH).toBe(process.env.PATH);
+      expect(env).toMatchObject({ ...launches[index].env, PASEO_ENV_TEST: "configured" });
+      expect(env?.USER).toBe(process.env.USER);
+      for (const key of [
+        "ELECTRON_RUN_AS_NODE",
+        "PASEO_SUPERVISED",
+        "CLAUDECODE",
+        "ESBUILD_BINARY_PATH",
+        "PASEO_NODE_ENV",
+      ]) {
+        expect(env).not.toHaveProperty(key);
+      }
+    };
+    const sessions = await Promise.all(
+      clients.map((client, i) => client.createSession(config, launches[i])),
+    );
+    try {
+      assertEnvironment(0);
+      assertEnvironment(1);
+      environments.clear();
+      first.push({ id: "reconnected-first", created: 2, type: "server.connected", data: {} });
+      second.push({ id: "reconnected-second", created: 2, type: "server.connected", data: {} });
+      await expect.poll(() => environments.size).toBe(2);
+      assertEnvironment(0);
+      assertEnvironment(1);
+    } finally {
+      await Promise.all(sessions.map((session) => session.close()));
+    }
+    environments.clear();
+    const resumed = await Promise.all(
+      clients.map((client, i) =>
+        client.resumeSession(sessions[i].describePersistence(), undefined, launches[i]),
+      ),
+    );
+    try {
+      assertEnvironment(0);
+      assertEnvironment(1);
+      expect(first.prompts).toEqual([]);
+      expect(second.prompts).toEqual([]);
+    } finally {
+      await Promise.all(resumed.map((session) => session.close()));
+    }
+  });
+
   test("reconnects after a helper exits and restores session configuration on the next turn", async () => {
     const first = new V2Harness();
     const second = new V2Harness();
@@ -54,7 +131,10 @@ describe("OpenCode v2 session lifecycle", () => {
       expect((await session.run("after exit")).finalText).toBe("recovered");
       expect(second.prompts).toEqual(["after exit"]);
       expect(second.mcpAdds).toEqual(["tools"]);
-      expect(second.environments).toEqual([{ sessionID: "session", variables: { TOKEN: "test" } }]);
+      expect(second.environments).toMatchObject([
+        { sessionID: "session", variables: { TOKEN: "test", PATH: process.env.PATH } },
+      ]);
+      expect(second.environments).toEqual(first.environments);
       expect(first.releases).toBe(1);
     } finally {
       await session.close();
@@ -384,7 +464,7 @@ describe("OpenCode v2 session lifecycle", () => {
     );
     try {
       expect(acquires).toEqual([{}]);
-      expect(harness.environments).toEqual([
+      expect(harness.environments).toMatchObject([
         {
           sessionID: "session",
           variables: { PASEO_AGENT_ID: "agent", PASEO_AGENT_CWD: "/tmp/project" },
diff --git a/packages/server/src/server/agent/providers/opencode/v2/agent.ts b/packages/server/src/server/agent/providers/opencode/v2/agent.ts
index 34ed21bd6c..2e50e759bd 100644
--- a/packages/server/src/server/agent/providers/opencode/v2/agent.ts
+++ b/packages/server/src/server/agent/providers/opencode/v2/agent.ts
@@ -29,7 +29,10 @@ import type {
   ListImportableSessionsOptions,
   ProviderRefreshContext,
 } from "../../../agent-sdk-types.js";
-import type { ProviderRuntimeSettings } from "../../../provider-launch-config.js";
+import {
+  createProviderEnv,
+  type ProviderRuntimeSettings,
+} from "../../../provider-launch-config.js";
 import type { ManagedProcessRegistry } from "../../../../managed-processes/managed-processes.js";
 
 import { importSessionFromPersistence } from "../../../provider-session-import.js";
@@ -205,7 +208,11 @@ export class OpenCodeV2AgentClient implements AgentClient {
         const location = { directory: config.cwd };
         await awaitPaseoPlugin({ client: connection.client, location });
       }
-      await session.initialize(launch);
+      await session.initialize(
+        launch?.env
+          ? createProviderEnv({ runtimeSettings: this.options.settings, overlays: [launch.env] })
+          : undefined,
+      );
       return session;
     } catch (error) {
       await session.close();
diff --git a/packages/server/src/server/agent/providers/opencode/v2/session.ts b/packages/server/src/server/agent/providers/opencode/v2/session.ts
index 27ed2974c4..315e75410c 100644
--- a/packages/server/src/server/agent/providers/opencode/v2/session.ts
+++ b/packages/server/src/server/agent/providers/opencode/v2/session.ts
@@ -8,7 +8,6 @@ import type { SessionInfo, SessionMessageInfo } from "@opencode/client";
 import { setTimeout as delay } from "node:timers/promises";
 import type { Logger } from "pino";
 import type {
-  AgentLaunchContext,
   AgentMode,
   AgentPermissionResponse,
   AgentPersistenceHandle,
@@ -36,6 +35,7 @@ import { features } from "./configuration.js";
 import { commands } from "./commands.js";
 import { messages } from "./history.js";
 import { SessionPermissions } from "./permissions.js";
+
 export class OpenCodeV2Session implements AgentSession {
   readonly provider = "opencode";
   readonly capabilities = V2_CAPABILITIES;
@@ -106,8 +106,9 @@ export class OpenCodeV2Session implements AgentSession {
   private get client() {
     return this.connection.client;
   }
-  async initialize(launch?: AgentLaunchContext) {
-    this.launchEnv = launch?.env;
+  async initialize(environment?: Record<string, string>) {
+    // OpenCode replaces the whole local shell environment, rather than overlaying it.
+    this.launchEnv = environment;
     this.watchExit(this.connection);
     await this.configureConnection();
     const location = { directory: this.config.cwd };
@@ -130,8 +131,6 @@ export class OpenCodeV2Session implements AgentSession {
     await waitForLocationReady({ client: this.client, location, signal: this.abort.signal });
     if (this.requiresPaseoPlugin)
       await awaitPaseoPlugin({ client: this.client, location, signal: this.abort.signal });
-    if (this.launchEnv)
-      await this.client.session.environment({ sessionID: this.id, variables: this.launchEnv });
     for (const [server, config] of Object.entries(this.config.mcpServers ?? {})) {
       await this.client.mcp.add({
         server,
@@ -389,6 +388,10 @@ export class OpenCodeV2Session implements AgentSession {
     }
   }
   private async reconcileConnection() {
+    // Session environments are process-local. Reapply this agent's snapshot before
+    // reconciling a new connection, including event-stream reconnections.
+    if (this.launchEnv)
+      await this.client.session.environment({ sessionID: this.id, variables: this.launchEnv });
     await this.reconcile();
     await this.children.reconcile(this.id);
     const active = await this.client.session.active();