November 4, 2026 | AI | By Mahesh

Apple announced the Siri AI Developer Preview on November 3, 2026, alongside the iOS, iPadOS, macOS and visionOS 27.3 betas, letting any developer connect an app to Siri AI through App Intents without a new entitlement or separate program [1][3]. Apps can expose custom actions and content and can add Skills, which are Markdown guides that tell Siri how to combine several tools [1][2]. Only development-signed builds and internal TestFlight testers get the feature for now, and App Store submissions open in spring [1][2].

What Apple announced

Before this preview, Siri AI could act inside third-party apps only through predefined schema domains [1]. Now any app can expose custom actions and content through App Intents, and exposure is opt-in, action by action [1]. Apple has built the same capabilities into its own apps, including Mail, Maps, Messages, Photos, Reminders and Safari [3]. Example requests for third-party apps include checking a delivery, booking a reservation or placing an order [3].

Users will not see many new voice actions right away. Capabilities reach customers in a few months, and Apple has not given a date [1][3]. Apple says terms and usage policies for Siri AI experiences will follow, and they are not yet published [1][3].

How developers connect an app

Adding the @AppIntent(.tool) macro makes an intent a tool that Siri can call [1][2]. Siri uses each intent's title and description to tell intents apart, and each parameter needs its own title and description [2]. Entities are found through the on-device Spotlight index, with an entity query as a fallback, and Siri can pass content between apps and show results in card snippets built from the app's own views [1][2].

Skills live in a Skills bundle as one folder per skill with a SKILL.md file [2]. The name is limited to 64 characters, the description to 1,024 and the body to 10,000, and the format is a subset of the open Agent Skills standard [1][2]. Siri reads only the front matter to decide whether a skill applies, so a vague description may mean the skill is never chosen [2]. Apple says skills cannot enforce deterministic behavior, and Siri does not run a skill's tools in a fixed order [2]. For another recent agent-related release, see Claude Haiku 5.5 Launch: $0.10 Input, 1M Context, Benchmarks.

Security, testing and requirements

Developers can set an authentication policy on an entity or a single property, and a property marked internal stays within the app and its extensions, away from Siri and Shortcuts [2]. Entities do not require authentication unless a policy is set [2]. Xcode adds a Siri Integration Advisor that reviews App Intents code and a Siri Evaluations framework, in beta, that scripts multi-turn conversations, and Apple recommends running each scenario several times because responses vary [1][2]. Skills can be verified only on a device and not in the Simulator [1].

Pricing, availability and timing

Apple lists no price for the developer preview, and it needs no new program or entitlement [1][2]. Server-side features, including Siri AI, have daily usage limits that Apple has not quantified, and Apple says expanded access will cost a fee in the future [1][3]. It is unclear whether third-party app requests count toward those limits [1]. The practical timeline is spring for App Store submissions and a few months for customers [1][3].

Limitations and what to watch

Siri AI is unavailable on iPhone, iPad and Apple Watch in the European Union, though it is available on EU Macs and Vision Pro, and Apple says it is working with the EU on a path forward [1][2]. Users under 13 are not eligible [2][3]. Apple warns that the App Intents API and Siri's behavior may change during the preview, and developers get no reporting on how often Siri calls their tools [1].

Developers who want to be ready can start by writing clear intent titles and descriptions, marking sensitive properties as internal and testing skills on a real device. Readers should treat the 27.3 betas as unfinished software and avoid installing them on a main device. For another look at AI tooling for builders, see Mistral Large 4 Preview: 1.05T Open-Weight MoE, Specs and Pricing.

Sources

1. PPC Land. "Apple opens Siri AI to all developers, but apps can't ship it until spring." ppc.land
2. DEV Community. "Siri AI Opens to Every App in the iOS 27.3 Beta. Its App Skills Are SKILL.md Files." dev.to
3. iPhone in Canada. "Apple Just Opened Siri AI to Every App, Here's What Changes," November 3, 2026. iphoneincanada.ca

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Article by Mahesh | Depth Grid