# Tengu

<div class="docs-release-hero">

![Tengu](./assets/hero.png)

</div>

_In Japanese folklore, a tengu is a winged mountain spirit that guards sacred peaks and tests travelers who climb too proudly._

This release lets you attach files from earlier steps to AI··Task, document a flow from the designer toolbar, choose GPT-6 Astra and Gemini 3.8 Flash, and create Akamai EdgeGrid and Oracle Cloud Infrastructure API key credentials.

## <span style="color: #16a34a">NEW</span>

### <span style="color: #16a34a">Attach files to AI··Task</span>

You can now attach files from earlier email triggers or service step responses so an AI··Task can analyze them with your prompt. Pick a response body or email attachments as file pills; each run resolves those files again from that execution.

<div class="docs-screenshot-compact">

![Review supplier policy flow with a Body file pill attached to the Summarize policy AI··Task](./assets/ai-task-file-attachment.png)

</div>

For more details, see [Analyze files with AI··Task](../../guides/build/use-ai-in-flows/analyze-files-with-ai-task/).

### <span style="color: #16a34a">Document a flow from the toolbar</span>

The designer toolbar now includes **Document workflow**. One click generates readable AI··Note documentation for the current flow so reviewers can see what the automation does without leaving the canvas.

<div class="docs-screenshot-compact">

![Designer toolbar with Document workflow selected](./assets/document-workflow-toolbar.png)

</div>

For more details, see [AI··Build: Faster flow creation](../../guides/build/design-your-flow/ai-build-faster-flow-creation/).

### <span style="color: #16a34a">GPT-6 Astra and Gemini 3.8 Flash</span>

You can now select GPT-6 Astra and Gemini 3.8 Flash in AI··Task and other model pickers. Use Astra for long-horizon professional work, and Gemini 3.8 Flash when you want a fast multimodal model.

For more details, see [AI··Task: A simple guide](../../guides/build/use-ai-in-flows/ai-task-a-simple-guide/).

### <span style="color: #16a34a">Akamai EdgeGrid credentials</span>

You can now create an Akamai EdgeGrid credential in Studio and use it with Akamai integrations that require EdgeGrid authentication.

For more details, see [Create and manage credentials](../../getting-started/credentials/).

### <span style="color: #16a34a">Oracle Cloud Infrastructure API key credentials</span>

You can now create an OCI API Key Signature credential for Oracle Cloud Infrastructure services that authenticate with an API signing key.

For more details, see [Create and manage credentials](../../getting-started/credentials/).

## <span style="color: #fb923c">CHANGES</span>

### <span style="color: #fb923c">Model routing label is now Region</span>

On model details, the former **Routing** label is now **Region**, so the regional path for a model call is easier to recognize.

### <span style="color: #fb923c">Add-step menu includes vendor credential services</span>

When you connect a vendor-style credential, matching services now appear in the add-step catalog so you can call them without hunting for the integration first.

For more details, see [Call native integrations](../../guides/build/reach-out-to-services/call-native-integrations/).

### <span style="color: #fb923c">Richer editing for AI··Task prompts and Notes</span>

**AI··Task** **Instructions** and **Input**, plus canvas **Note** / **AI··Note** steps, now use Studio’s rich text
editor. Headings, lists, and other formatting render while you type; you can switch an AI··Task field to raw markdown
when you need the source. Flow documentation on the canvas is easier to write and scan.

<div class="docs-screenshot-compact">

![Note step with rich text formatting toolbar](./assets/note-step-rich-editor.png)

</div>

For more details, see [AI··Task: A simple guide](../../guides/build/use-ai-in-flows/ai-task-a-simple-guide/) and
[Handy tools](../../guides/build/control-flow-execution/handy-tools/).

## <span style="color: #dc2626">FIXES</span>

- Signing out could leave Studio in a broken state until you refreshed. (#7132)
- OAuth refresh and certificate-based client authentication could fail after a credential update. (#7229)
- OAuth2 client authentication could fail when the client ID needed special encoding. (#7208)
- OIDC credentials with a generic issuer could reject a valid ID token. (#7211)
- Starting a flow could fail when variables or binary values used an unsupported wire format. (#7217)
- Flow previews could fail to show binary step results. (#7210)
- Credential lookup could resolve the wrong credential when the same name existed in Global and the environment. (#7133)
- AI proxy models could disappear after you edited an Advanced credential. (#7135)
- Step selection could clear while you edited a step with logs open. (#7128)
- Public templates could open or behave incorrectly. (#7113)
- Opening the designer could jump the canvas before the layout settled. (#7101)
- AI··Task could require Input even when the step only needed attached files. (#7180)
- Very large data constants could fail to save on a step. (#7077)
- Live dry-run logs and failure email links could miss the step you meant to open. (#7134)