Services Extension Consumption

Consuming salesforcedx-vscode-services

Extensions depending on salesforcedx-vscode-services. Examples: salesforcedx-vscode-metadata, salesforcedx-vscode-org-browser.

Getting the API

Use ExtensionProviderService from @salesforce/effect-ext-utils:

import { ExtensionProviderService, getServicesApi } from '@salesforce/effect-ext-utils';

const ExtensionProviderServiceLive = Layer.effect(
  ExtensionProviderService,
  Effect.sync(() => ({
    getServicesApi
  }))
);

// In an Effect.gen:
const api = yield * (yield * ExtensionProviderService).getServicesApi;

Prebuilt vs Per-Extension Services

api.services.prebuiltServicesLayer — shared service instances plus redacting-logger FiberRef. Not the OTEL tracer. Provide or merge this layer directly.

api.services.prebuiltServicesDependencies — deprecated context-only field. Omits FiberRefs; use prebuiltServicesLayer.

Shares singleton instances (caches, watchers) across extensions; avoids re-building stateful services.

Per-extension layers (must build yourself):

ExtensionContext Setup

Preferred: import buildAllServicesLayer from @salesforce/effect-ext-utils. It reads displayName from package.json, falling back to the second arg. services/extensionProvider.ts only needs the mutable AllServicesLayer + setter:

// services/extensionProvider.ts
import { buildAllServicesLayer } from '@salesforce/effect-ext-utils';

export let AllServicesLayer: ReturnType<typeof buildAllServicesLayer>;
export const setAllServicesLayer = (layer: ReturnType<typeof buildAllServicesLayer>) => {
  AllServicesLayer = layer;
};

In activate — pass the context and a localized fallback channel name:

import { buildAllServicesLayer } from '@salesforce/effect-ext-utils';
import { nls } from './messages';
import { setAllServicesLayer } from './services/extensionProvider';

export const activate = async (context: vscode.ExtensionContext): Promise<void> => {
  setAllServicesLayer(buildAllServicesLayer(context, nls.localize('channel_name')));
  await getRuntime().runPromise(activateEffect(context));
};

Two patterns exist depending on whether the extension adds services beyond the shared base:

• Shared base only (core, apex, apex-testing, lightning, lwc, org, visualforce): import buildAllServicesLayer directly from @salesforce/effect-ext-utils and pass it to setAllServicesLayer at activation. No local factory needed.
• Extension-specific services added (apex-debugger, apex-log, apex-oas, apex-replay-debugger, metadata, org-browser, soql): define a local buildAllServicesLayer in services/extensionProvider.ts that calls buildSharedServicesLayer from @salesforce/effect-ext-utils and merges the extension's own Effect services via Layer.mergeAll. The extra services vary — apex-oas adds ApexMetadataService and LLMService; extensions with the notifications system add NotificationModeService.Default; org-browser adds OrgBrowserRetrieveService.

Runtime vs provide

• buildAllServicesLayer merges suppressVersionMismatchWarning. Extension code keeps ManagedRuntime.make(AllServicesLayer); do not wrap it. The services activation runtime inlines Layer.setVersionMismatchErrorLogLevel(Option.none()) because it cannot import effect-ext-utils.
• Do: Build ManagedRuntime.make(AllServicesLayer) and export getRuntime().
• Do: Export runtime disposal, clear the memo, and call it during extension deactivation.
• Do: Use getRuntime().runPromise(effect) / runFork(effect) for ad-hoc execution.
• Don't: Use Effect.provide(AllServicesLayer) at call sites — use the runtime instead.

export const disposeRuntime = async (): Promise<void> => {
  if (_runtime) {
    await _runtime.dispose();
    _runtime = undefined;
  }
};

export const deactivate = async (): Promise<void> => {
  await getRuntime().runPromise(deactivation()).finally(disposeRuntime);
};

Resource Lifecycle

Prefer Effect scope ownership for resources created inside Effect services/layers:

• Define resource-owning services with scoped.
• Register VS Code Disposables with Effect.addFinalizer.
• Attach long-lived fibers to the owning scope with Effect.forkIn.
• Dispose the owning ManagedRuntime on deactivation so layer finalizers run.
• Don't expose runDispose/dispose solely for consumers to add to context.subscriptions.
• Keep context.subscriptions for resources created outside an Effect scope.

Allocation and cleanup stay together. See ../effect-best-practices/SKILL.md#effect-owned-resources.

Registering Commands

Use registerCommandWithRuntime:

import { myCommandEffect } from './commands/myCommand';

const api = yield * (yield * ExtensionProviderService).getServicesApi;

const registerCommand = api.services.registerCommandWithRuntime(getRuntime());
yield * registerCommand('sf.my.command', myCommandEffect);

Commands auto:

• Register with ExtensionContext subscriptions
• Wrap with error handling
• Trace with observability spans
• Handle Cancellation

Activation ordering

activate() awaits getRuntime().runPromise(activateEffect(context)); it does not detach the main activation Effect. Only work explicitly started with Effect.fork* continues after activation completes.

Register all manifest-contributed UI before awaiting work that can be slow or unresolved:

1. Register tree/webview providers and put any returned Disposable in context.subscriptions when it is not scope-owned.
2. Restore the extension's persisted UI state and set its context keys.
3. Register every contributed command.
4. Set an extension-owned readiness context key only after steps 1-3 succeed, and use it to gate title/menu commands that would otherwise be visible.
5. Only then await connection resolution, target-org readiness, catalog hydration, or network work. Use Effect.forkIn for long-lived watchers that do not need to block activation.

when clauses can expose a contributed command before its handler has registered. A context key owned by another extension, including sf:has_target_org, is a visibility hint, not proof that this extension has initialized. Do not make a contributed handler's registration depend on it. Keep target-org and authorization checks in the command implementation or shared service layer.

export const activateEffect = Effect.fn(`activation:${EXTENSION_NAME}`)(function* (context: vscode.ExtensionContext) {
  const api = yield* (yield* ExtensionProviderService).getServicesApi;
  const provider = new MyTreeProvider();
  context.subscriptions.push(vscode.window.registerTreeDataProvider(VIEW_ID, provider));

  yield* setInitialContext();
  const registerCommand = api.services.registerCommandWithRuntime(getRuntime());
  yield* registerCommand('sf.my.command', () => myCommand(provider));
  yield* Effect.promise(() => vscode.commands.executeCommand('setContext', 'sf:myExtension.ready', true));

  // Command registration must not wait for org-backed initialization.
  yield* api.services.ConnectionService.getConnection();
});

Success handling

Effect.fn middleware runs left to right after the generator. Effect.tap and *SuccessNotification before catch* (catch, catchAll, catchAllCause, catchCause, catchCauseIf, catchIf, catchSome, catchSomeCause, catchTag, catchTags) — a success combinator after catch treats recovery as success. Later catch valid. Later non-success guard (preventOrgChanges) valid. Lint: local/effect-fn-catch-middleware-last on spanned Effect.fn (fn('span'), fn('name', options)). Skips fnUntraced, unspanned fn(function*), generator-body catch, .pipe catch.

export const deployActiveEditorCommand = Effect.fn('deploySourcePath.deployActiveEditor')(
  function* () {
    // ...core logic...
  },
  // runs only on success — placed before catchTag
  withConfigurableSuccessNotification(nls.localize('command_succeeded_text', label)),
  // catches errors — placed after success middleware
  Effect.catchTag('NoActiveEditorError', () =>
    Effect.promise(() => vscode.window.showErrorMessage(nls.localize('deploy_select_file_or_directory'))).pipe(
      Effect.as(undefined)
    )
  )
);

withConfigurableSuccessNotification wraps the effect with Effect.tap, so it only fires when the effect succeeds:

export const withConfigurableSuccessNotification =
  (message: string) =>
  <A, E, R>(effect: Effect.Effect<A, E, R>) =>
    Effect.tap(effect, () =>
      Effect.sync(() => {
        const show = vscode.workspace.getConfiguration(SECTION).get<boolean>(KEY, false);
        if (show) void vscode.window.showInformationMessage(message);
      })
    );

Invoking sf.org.login.web

Cross-extension / executeCommand: vscode.commands.executeCommand('sf.org.login.web', instanceUrl?, reauthAliasOrUsername?).

• No args: interactive flow (palette).
• With instanceUrl: skips org-type quick pick.
• Second arg applies only when instanceUrl was provided: trimmed non-empty string becomes the auth alias (access-token re-auth); else alias defaults to reauth-vscodeOrg.