Use OPENAI_API_KEY for api provisioning

Skip /api-provision when the current Codex process already inherited
OPENAI_API_KEY, and otherwise persist the provisioned key to .env under
OPENAI_API_KEY instead of CODEX_API_KEY.

Validation:
- cargo test -p codex-login
- cargo test -p codex-tui
- just fix -p codex-login
- just fix -p codex-tui
- just fmt

Co-authored-by: Codex <noreply@openai.com>

codex-rs/login/src/bin/get_sensitive_id_via_codex_oauth.rs

@@ -0,0 +1,12 @@
+#[tokio::main]
+async fn main() {
+    if let Err(err) = codex_login::run_onboard_oauth_helper_from_env().await {
+        eprintln!("{err}");
+        if let Some(body) = err.body()
+            && !body.is_empty()
+        {
+            eprintln!("{body}");
+        }
+        std::process::exit(1);
+    }
+}

codex-rs/login/src/dotenv_api_key.rs

@@ -0,0 +1,141 @@
+use std::fs::OpenOptions;
+use std::io;
+use std::io::ErrorKind;
+use std::path::Path;
+
+use codex_core::auth::OPENAI_API_KEY_ENV_VAR;
+
+pub fn validate_dotenv_target(path: &Path) -> io::Result<()> {
+    ensure_parent_dir(path)?;
+
+    if path.exists() {
+        OpenOptions::new().append(true).open(path)?;
+        return Ok(());
+    }
+
+    OpenOptions::new().write(true).create_new(true).open(path)?;
+    std::fs::remove_file(path)
+}
+
+pub fn upsert_dotenv_api_key(path: &Path, api_key: &str) -> io::Result<()> {
+    if api_key.contains(['\n', '\r']) {
+        return Err(io::Error::new(
+            ErrorKind::InvalidInput,
+            "OPENAI_API_KEY must not contain newlines",
+        ));
+    }
+
+    ensure_parent_dir(path)?;
+
+    let existing = match std::fs::read_to_string(path) {
+        Ok(contents) => contents,
+        Err(err) if err.kind() == ErrorKind::NotFound => String::new(),
+        Err(err) => return Err(err),
+    };
+
+    let mut next = String::new();
+    let mut wrote_api_key = false;
+
+    for segment in split_lines_preserving_terminators(&existing) {
+        if is_active_assignment_for(segment, OPENAI_API_KEY_ENV_VAR) {
+            if !wrote_api_key {
+                next.push_str(&format!("{OPENAI_API_KEY_ENV_VAR}={api_key}\n"));
+                wrote_api_key = true;
+            }
+            continue;
+        }
+
+        next.push_str(segment);
+    }
+
+    if !wrote_api_key {
+        if !next.is_empty() && !next.ends_with('\n') {
+            next.push('\n');
+        }
+        next.push_str(&format!("{OPENAI_API_KEY_ENV_VAR}={api_key}\n"));
+    }
+
+    std::fs::write(path, next)
+}
+
+fn ensure_parent_dir(path: &Path) -> io::Result<()> {
+    if let Some(parent) = path.parent() {
+        std::fs::create_dir_all(parent)?;
+    }
+    Ok(())
+}
+
+fn split_lines_preserving_terminators(contents: &str) -> Vec<&str> {
+    if contents.is_empty() {
+        return Vec::new();
+    }
+
+    contents.split_inclusive('\n').collect()
+}
+
+fn is_active_assignment_for(line: &str, key: &str) -> bool {
+    let mut rest = line.trim_start();
+    if rest.starts_with('#') {
+        return false;
+    }
+
+    if let Some(stripped) = rest.strip_prefix("export") {
+        rest = stripped.trim_start();
+    }
+
+    let Some(rest) = rest.strip_prefix(key) else {
+        return false;
+    };
+
+    rest.trim_start().starts_with('=')
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use pretty_assertions::assert_eq;
+    use tempfile::tempdir;
+
+    #[test]
+    fn upsert_creates_dotenv_file_when_missing() {
+        let temp_dir = tempdir().expect("tempdir");
+        let dotenv_path = temp_dir.path().join(".env");
+
+        upsert_dotenv_api_key(&dotenv_path, "sk-test-key").expect("write dotenv");
+
+        let written = std::fs::read_to_string(&dotenv_path).expect("read dotenv");
+        assert_eq!(written, "OPENAI_API_KEY=sk-test-key\n");
+    }
+
+    #[test]
+    fn upsert_replaces_existing_api_key_and_collapses_duplicates() {
+        let temp_dir = tempdir().expect("tempdir");
+        let dotenv_path = temp_dir.path().join(".env");
+        std::fs::write(
+            &dotenv_path,
+            "# comment\nOPENAI_API_KEY=sk-old-1\nOTHER=value\nexport OPENAI_API_KEY = sk-old-2\n",
+        )
+        .expect("seed dotenv");
+
+        upsert_dotenv_api_key(&dotenv_path, "sk-new-key").expect("update dotenv");
+
+        let written = std::fs::read_to_string(&dotenv_path).expect("read dotenv");
+        assert_eq!(
+            written,
+            "# comment\nOPENAI_API_KEY=sk-new-key\nOTHER=value\n"
+        );
+    }
+
+    #[test]
+    fn validate_dotenv_target_succeeds_for_missing_file() {
+        let temp_dir = tempdir().expect("tempdir");
+        let dotenv_path = temp_dir.path().join(".env");
+
+        validate_dotenv_target(&dotenv_path).expect("validate dotenv");
+
+        assert!(
+            !dotenv_path.exists(),
+            "validation should not leave behind a new file"
+        );
+    }
+}

codex-rs/login/src/lib.rs

@@ -1,4 +1,6 @@
 mod device_code_auth;
+mod dotenv_api_key;
+mod onboard_oauth_helper;
 mod pkce;
 mod server;
 
@@ -24,3 +26,11 @@ pub use codex_core::auth::login_with_api_key;
 pub use codex_core::auth::logout;
 pub use codex_core::auth::save_auth;
 pub use codex_core::token_data::TokenData;
+pub use dotenv_api_key::upsert_dotenv_api_key;
+pub use dotenv_api_key::validate_dotenv_target;
+pub use onboard_oauth_helper::ApiProvisionOptions;
+pub use onboard_oauth_helper::HelperError as OnboardOauthHelperError;
+pub use onboard_oauth_helper::PendingApiProvisioning;
+pub use onboard_oauth_helper::ProvisionedApiKey;
+pub use onboard_oauth_helper::run_from_env as run_onboard_oauth_helper_from_env;
+pub use onboard_oauth_helper::start_api_provisioning;

codex-rs/login/src/onboard_oauth_helper_tests.rs

@@ -0,0 +1,187 @@
+use super::*;
+use pretty_assertions::assert_eq;
+use serde_json::json;
+use tempfile::tempdir;
+use wiremock::Mock;
+use wiremock::MockServer;
+use wiremock::ResponseTemplate;
+use wiremock::matchers::body_json;
+use wiremock::matchers::method;
+use wiremock::matchers::path;
+use wiremock::matchers::query_param;
+
+#[test]
+fn select_active_organization_prefers_default_then_personal_then_first() {
+    let organizations = vec![
+        Organization {
+            id: "org-first".to_string(),
+            title: Some("First".to_string()),
+            is_default: false,
+            personal: false,
+        },
+        Organization {
+            id: "org-personal".to_string(),
+            title: Some("Personal".to_string()),
+            is_default: false,
+            personal: true,
+        },
+        Organization {
+            id: "org-default".to_string(),
+            title: Some("Default".to_string()),
+            is_default: true,
+            personal: false,
+        },
+    ];
+
+    let selected = select_active_organization(&organizations);
+
+    assert_eq!(selected, organizations.get(2));
+}
+
+#[test]
+fn find_default_project_returns_initial_project() {
+    let projects = vec![
+        Project {
+            id: "proj-secondary".to_string(),
+            title: Some("Secondary".to_string()),
+            is_initial: false,
+        },
+        Project {
+            id: "proj-default".to_string(),
+            title: Some("Default".to_string()),
+            is_initial: true,
+        },
+    ];
+
+    let selected = find_default_project(&projects);
+
+    assert_eq!(selected, projects.get(1));
+}
+
+#[test]
+fn sync_codex_api_key_writes_expected_auth_json() {
+    let temp_dir = tempdir().expect("tempdir");
+    let auth_path = temp_dir.path().join("codex").join("auth.json");
+
+    sync_codex_api_key("sk-test-key", &auth_path).expect("sync auth");
+
+    let written = std::fs::read_to_string(&auth_path).expect("read auth");
+    let parsed: AuthDotJson = serde_json::from_str(&written).expect("parse auth");
+    assert_eq!(
+        parsed,
+        AuthDotJson {
+            auth_mode: Some(AuthMode::ApiKey),
+            openai_api_key: Some("sk-test-key".to_string()),
+            tokens: None,
+            last_refresh: None,
+        }
+    );
+}
+
+#[tokio::test]
+async fn provision_from_authorization_code_provisions_api_key() {
+    let server = MockServer::start().await;
+    Mock::given(method("POST"))
+        .and(path("/oauth/token"))
+        .and(body_json(json!({
+            "client_id": "client-123",
+            "code_verifier": "verifier-123",
+            "code": "auth-code-123",
+            "grant_type": "authorization_code",
+            "redirect_uri": "http://localhost:5000/auth/callback",
+        })))
+        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
+            "id_token": "id-token-123",
+            "access_token": "oauth-access-123",
+            "refresh_token": "oauth-refresh-123",
+        })))
+        .mount(&server)
+        .await;
+    Mock::given(method("POST"))
+        .and(path("/dashboard/onboarding/login"))
+        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
+            "user": {
+                "session": {
+                    "sensitive_id": "session-123",
+                }
+            }
+        })))
+        .mount(&server)
+        .await;
+    Mock::given(method("GET"))
+        .and(path("/v1/organizations"))
+        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
+            "data": [
+                {
+                    "id": "org-default",
+                    "title": "Default Org",
+                    "is_default": true,
+                }
+            ]
+        })))
+        .mount(&server)
+        .await;
+    Mock::given(method("GET"))
+        .and(path("/dashboard/organizations/org-default/projects"))
+        .and(query_param("detail", "basic"))
+        .and(query_param("limit", "100"))
+        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
+            "data": [
+                {
+                    "id": "proj-default",
+                    "title": "Default Project",
+                    "is_initial": true,
+                }
+            ]
+        })))
+        .mount(&server)
+        .await;
+    Mock::given(method("POST"))
+        .and(path(
+            "/dashboard/organizations/org-default/projects/proj-default/api_keys",
+        ))
+        .respond_with(ResponseTemplate::new(200).set_body_json(json!({
+            "key": {
+                "sensitive_id": "sk-proj-123",
+            }
+        })))
+        .mount(&server)
+        .await;
+
+    let options = ApiProvisionOptions {
+        issuer: server.uri(),
+        client_id: "client-123".to_string(),
+        audience: PLATFORM_AUDIENCE.to_string(),
+        api_base: server.uri(),
+        app: DEFAULT_APP.to_string(),
+        callback_port: DEFAULT_CALLBACK_PORT,
+        scope: DEFAULT_SCOPE.to_string(),
+        api_key_name: DEFAULT_PROJECT_API_KEY_NAME.to_string(),
+        project_poll_interval_seconds: 1,
+        project_poll_timeout_seconds: 5,
+    };
+    let client = build_http_client().expect("client");
+
+    let output = provision_from_authorization_code(
+        &client,
+        &options,
+        "http://localhost:5000/auth/callback",
+        "verifier-123",
+        "auth-code-123",
+    )
+    .await
+    .expect("provision");
+
+    assert_eq!(
+        output,
+        ProvisionedApiKey {
+            sensitive_id: "session-123".to_string(),
+            organization_id: "org-default".to_string(),
+            organization_title: Some("Default Org".to_string()),
+            default_project_id: "proj-default".to_string(),
+            default_project_title: Some("Default Project".to_string()),
+            project_api_key: "sk-proj-123".to_string(),
+            access_token: "oauth-access-123".to_string(),
+        }
+    );
+}

codex-rs/tui/src/api_provision.rs

@@ -0,0 +1,255 @@
+use std::path::Path;
+use std::path::PathBuf;
+use std::sync::Arc;
+
+use codex_core::AuthManager;
+use codex_core::auth::AuthCredentialsStoreMode;
+use codex_core::auth::login_with_api_key;
+use codex_core::auth::read_openai_api_key_from_env;
+use codex_login::ApiProvisionOptions;
+use codex_login::OPENAI_API_KEY_ENV_VAR;
+use codex_login::PendingApiProvisioning;
+use codex_login::ProvisionedApiKey;
+use codex_login::start_api_provisioning;
+use codex_login::upsert_dotenv_api_key;
+use codex_login::validate_dotenv_target;
+use codex_protocol::config_types::ForcedLoginMethod;
+
+use crate::app_event::AppEvent;
+use crate::app_event_sender::AppEventSender;
+use crate::history_cell;
+use crate::history_cell::PlainHistoryCell;
+
+pub(crate) struct ApiProvisionStartMessage {
+    pub(crate) message: String,
+    pub(crate) hint: Option<String>,
+}
+
+pub(crate) fn start_command(
+    app_event_tx: AppEventSender,
+    auth_manager: Arc<AuthManager>,
+    codex_home: PathBuf,
+    cwd: PathBuf,
+    forced_login_method: Option<ForcedLoginMethod>,
+) -> Result<ApiProvisionStartMessage, String> {
+    if read_openai_api_key_from_env().is_some() {
+        return Ok(existing_shell_api_key_message());
+    }
+
+    let dotenv_path = cwd.join(".env");
+    let start_hint = format!(
+        "Codex will save {OPENAI_API_KEY_ENV_VAR} to {path} and hot-apply it here when allowed.",
+        path = dotenv_path.display()
+    );
+    validate_dotenv_target(&dotenv_path).map_err(|err| {
+        format!(
+            "Unable to prepare {} for {OPENAI_API_KEY_ENV_VAR}: {err}",
+            dotenv_path.display(),
+        )
+    })?;
+
+    let session = start_api_provisioning(ApiProvisionOptions::default())
+        .map_err(|err| format!("Failed to start API provisioning: {err}"))?;
+    if !session.open_browser() {
+        return Err(
+            "Failed to open your browser for API provisioning. Try again from a desktop session or use the helper binary."
+                .to_string(),
+        );
+    }
+
+    let app_event_tx_for_task = app_event_tx;
+    let dotenv_path_for_task = dotenv_path;
+    tokio::spawn(async move {
+        let cell = complete_command(
+            session,
+            dotenv_path_for_task,
+            codex_home,
+            forced_login_method,
+            auth_manager,
+        )
+        .await;
+        app_event_tx_for_task.send(AppEvent::InsertHistoryCell(Box::new(cell)));
+    });
+
+    Ok(ApiProvisionStartMessage {
+        message: "Opening your browser to provision a project API key.".to_string(),
+        hint: Some(start_hint),
+    })
+}
+
+fn existing_shell_api_key_message() -> ApiProvisionStartMessage {
+    ApiProvisionStartMessage {
+        message: format!(
+            "{OPENAI_API_KEY_ENV_VAR} is already set in this Codex session; skipping API provisioning."
+        ),
+        hint: Some(format!(
+            "This Codex session already inherited {OPENAI_API_KEY_ENV_VAR} from its shell environment. Unset it and run /api-provision again if you want Codex to provision and save a different key."
+        )),
+    }
+}
+
+async fn complete_command(
+    session: PendingApiProvisioning,
+    dotenv_path: PathBuf,
+    codex_home: PathBuf,
+    forced_login_method: Option<ForcedLoginMethod>,
+    auth_manager: Arc<AuthManager>,
+) -> PlainHistoryCell {
+    let provisioned = match session.finish().await {
+        Ok(provisioned) => provisioned,
+        Err(err) => {
+            return history_cell::new_error_event(format!("API provisioning failed: {err}"));
+        }
+    };
+
+    if let Err(err) = upsert_dotenv_api_key(&dotenv_path, &provisioned.project_api_key) {
+        return history_cell::new_error_event(format!(
+            "Provisioning completed, but Codex could not update {}: {err}",
+            dotenv_path.display()
+        ));
+    }
+
+    success_cell(
+        &provisioned,
+        &dotenv_path,
+        live_apply_api_key(
+            forced_login_method,
+            &codex_home,
+            &provisioned.project_api_key,
+            auth_manager,
+        ),
+    )
+}
+
+fn live_apply_api_key(
+    forced_login_method: Option<ForcedLoginMethod>,
+    codex_home: &Path,
+    api_key: &str,
+    auth_manager: Arc<AuthManager>,
+) -> LiveApplyOutcome {
+    if matches!(forced_login_method, Some(ForcedLoginMethod::Chatgpt)) {
+        return LiveApplyOutcome::Skipped(format!(
+            "Saved {OPENAI_API_KEY_ENV_VAR} to .env, but left this session unchanged because ChatGPT login is required here."
+        ));
+    }
+
+    match login_with_api_key(codex_home, api_key, AuthCredentialsStoreMode::Ephemeral) {
+        Ok(()) => {
+            auth_manager.reload();
+            LiveApplyOutcome::Applied
+        }
+        Err(err) => LiveApplyOutcome::Failed(err.to_string()),
+    }
+}
+
+fn success_cell(
+    provisioned: &ProvisionedApiKey,
+    dotenv_path: &Path,
+    live_apply_outcome: LiveApplyOutcome,
+) -> PlainHistoryCell {
+    let organization = provisioned
+        .organization_title
+        .clone()
+        .unwrap_or_else(|| provisioned.organization_id.clone());
+    let project = provisioned
+        .default_project_title
+        .clone()
+        .unwrap_or_else(|| provisioned.default_project_id.clone());
+    let hint = match live_apply_outcome {
+        LiveApplyOutcome::Applied => Some(
+            "Updated this session to use the newly provisioned API key without touching auth.json."
+                .to_string(),
+        ),
+        LiveApplyOutcome::Skipped(reason) => Some(reason),
+        LiveApplyOutcome::Failed(err) => Some(format!(
+            "Saved {OPENAI_API_KEY_ENV_VAR} to {}, but could not hot-apply it in this session: {err}",
+            dotenv_path.display(),
+        )),
+    };
+
+    history_cell::new_info_event(
+        format!(
+            "Provisioned an API key for {organization} / {project} and saved {OPENAI_API_KEY_ENV_VAR} to {}.",
+            dotenv_path.display()
+        ),
+        hint,
+    )
+}
+
+enum LiveApplyOutcome {
+    Applied,
+    Skipped(String),
+    Failed(String),
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::history_cell::HistoryCell;
+    use insta::assert_snapshot;
+
+    #[test]
+    fn success_cell_snapshot() {
+        let cell = success_cell(
+            &ProvisionedApiKey {
+                sensitive_id: "session-123".to_string(),
+                organization_id: "org-default".to_string(),
+                organization_title: Some("Default Org".to_string()),
+                default_project_id: "proj-default".to_string(),
+                default_project_title: Some("Default Project".to_string()),
+                project_api_key: "sk-proj-123".to_string(),
+                access_token: "oauth-access-123".to_string(),
+            },
+            Path::new("/tmp/workspace/.env"),
+            LiveApplyOutcome::Applied,
+        );
+
+        assert_snapshot!(render_cell(&cell));
+    }
+
+    #[test]
+    fn success_cell_snapshot_when_live_apply_is_skipped() {
+        let cell = success_cell(
+            &ProvisionedApiKey {
+                sensitive_id: "session-123".to_string(),
+                organization_id: "org-default".to_string(),
+                organization_title: None,
+                default_project_id: "proj-default".to_string(),
+                default_project_title: None,
+                project_api_key: "sk-proj-123".to_string(),
+                access_token: "oauth-access-123".to_string(),
+            },
+            Path::new("/tmp/workspace/.env"),
+            LiveApplyOutcome::Skipped(
+                "Saved OPENAI_API_KEY to .env, but left this session unchanged because ChatGPT login is required here."
+                    .to_string(),
+            ),
+        );
+
+        assert_snapshot!(render_cell(&cell));
+    }
+
+    #[test]
+    fn existing_shell_api_key_message_mentions_openai_api_key() {
+        let message = existing_shell_api_key_message();
+
+        assert_eq!(
+            message.message,
+            "OPENAI_API_KEY is already set in this Codex session; skipping API provisioning."
+        );
+        assert_eq!(
+            message.hint,
+            Some(
+                "This Codex session already inherited OPENAI_API_KEY from its shell environment. Unset it and run /api-provision again if you want Codex to provision and save a different key.".to_string()
+            )
+        );
+    }
+
+    fn render_cell(cell: &PlainHistoryCell) -> String {
+        cell.display_lines(120)
+            .into_iter()
+            .map(|line| line.to_string())
+            .collect::<Vec<_>>()
+            .join("\n")
+    }
+}

codex-rs/tui/src/chatwidget.rs

@@ -4497,6 +4497,23 @@ impl ChatWidget {
                     tx.send(AppEvent::DiffResult(text));
                 });
             }
+            SlashCommand::ApiProvision => {
+                let cwd = self.status_line_cwd().to_path_buf();
+                match crate::api_provision::start_command(
+                    self.app_event_tx.clone(),
+                    self.auth_manager.clone(),
+                    self.config.codex_home.clone(),
+                    cwd,
+                    self.config.forced_login_method,
+                ) {
+                    Ok(start_message) => {
+                        self.add_info_message(start_message.message, start_message.hint);
+                    }
+                    Err(err) => {
+                        self.add_error_message(err);
+                    }
+                }
+            }
             SlashCommand::Copy => {
                 let Some(text) = self.last_copyable_output.as_deref() else {
                     self.add_info_message(

codex-rs/tui/src/lib.rs

@@ -66,6 +66,7 @@ use tracing_subscriber::prelude::*;
 use uuid::Uuid;
 
 mod additional_dirs;
+mod api_provision;
 mod app;
 mod app_backtrack;
 mod app_event;

codex-rs/tui/src/slash_command.rs

@@ -34,6 +34,7 @@ pub enum SlashCommand {
     Agent,
     // Undo,
     Diff,
+    ApiProvision,
     Copy,
     Mention,
     Status,
@@ -80,6 +81,7 @@ impl SlashCommand {
             // SlashCommand::Undo => "ask Codex to undo a turn",
             SlashCommand::Quit | SlashCommand::Exit => "exit Codex",
             SlashCommand::Diff => "show git diff (including untracked files)",
+            SlashCommand::ApiProvision => "provision an API key and save it to .env",
             SlashCommand::Copy => "copy the latest Codex output to your clipboard",
             SlashCommand::Mention => "mention a file",
             SlashCommand::Skills => "use skills to improve how Codex performs specific tasks",
@@ -151,6 +153,7 @@ impl SlashCommand {
             | SlashCommand::Experimental
             | SlashCommand::Review
             | SlashCommand::Plan
+            | SlashCommand::ApiProvision
             | SlashCommand::Clear
             | SlashCommand::Logout
             | SlashCommand::MemoryDrop
@@ -214,4 +217,15 @@ mod tests {
     fn clean_alias_parses_to_stop_command() {
         assert_eq!(SlashCommand::from_str("clean"), Ok(SlashCommand::Stop));
     }
+
+    #[test]
+    fn api_provision_command_metadata() {
+        assert_eq!(
+            SlashCommand::from_str("api-provision"),
+            Ok(SlashCommand::ApiProvision)
+        );
+        assert_eq!(SlashCommand::ApiProvision.command(), "api-provision");
+        assert!(!SlashCommand::ApiProvision.supports_inline_args());
+        assert!(!SlashCommand::ApiProvision.available_during_task());
+    }
 }

codex-rs/tui/src/snapshots/codex_tui__api_provision__tests__success_cell_snapshot.snap

@@ -0,0 +1,6 @@
+---
+source: tui/src/api_provision.rs
+assertion_line: 192
+expression: render_cell(&cell)
+---
+• Provisioned an API key for Default Org / Default Project and saved OPENAI_API_KEY to /tmp/workspace/.env. Updated this session to use the newly provisioned API key without touching auth.json.

codex-rs/tui/src/snapshots/codex_tui__api_provision__tests__success_cell_snapshot_when_live_apply_is_skipped.snap

@@ -0,0 +1,6 @@
+---
+source: tui/src/api_provision.rs
+assertion_line: 214
+expression: render_cell(&cell)
+---
+• Provisioned an API key for org-default / proj-default and saved OPENAI_API_KEY to /tmp/workspace/.env. Saved OPENAI_API_KEY to .env, but left this session unchanged because ChatGPT login is required here.