---
title: "Skills: assign one skill to multiple apps"
description: "Skills now carry an app_ids array, so a single skill can be scoped to several apps at once or shared with every app."
date: 2026-06-26
tags: ["TIE AI Gateway"]
---

> Documentation Index
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# Skills: assign one skill to multiple apps

Skills now carry an `app_ids` array instead of a single `app_id`. One skill can serve several apps at once, or every app on the platform.

Set `app_ids` to the list of apps that should see the skill. Leave it `null` (or omit it) to share the skill with every app.

```json
{
  "key": "summarize-thread",
  "name": "Summarize Thread",
  "prompt": "Summarize the conversation so far in 3 short bullet points.",
  "app_ids": ["vibrantly", "blinklife"]
}
```

A `null` `app_ids` marks the skill as global — visible to all apps:

```json
{ "key": "translate", "name": "Translate", "prompt": "Translate to formal English.", "app_ids": null }
```

## Why this matters

Before this change, a shared skill had to be duplicated once per app, and each copy drifted on its own. A single record assigned to many apps keeps one source of truth and removes the duplicates.

## Backward compatibility

The legacy scalar `app_id` still works on create and update. TIE folds it into a one-element `app_ids` list, so existing single-app callers need no changes. Responses now return `app_ids`.

The `app_id` query filter on `GET /skills` is unchanged. It still names the requesting app and returns skills assigned to that app plus global skills.

See the [app scoping section of the Skills guide](/ai-gateway/skills/#app-scoping) for the full contract.

Source: https://truememory-docs.mvstg.com/changelog/tie-ai-gateway/2026-06-26-skills-multi-app-scoping//index.md