> ## Documentation Index
> Fetch the complete documentation index at: https://docs.terminal3.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> What's changed in these docs, and what we know about SDK version history so far.

<Note>
  This page currently tracks **documentation** changes we can verify directly, since we don't yet have a confirmed, complete SDK release history to publish. If you need details on a specific past SDK release, ask in the [developer Telegram](https://t.me/terminal3developer) — we'll backfill verified entries here as we confirm them.
</Note>

## Documentation

### 2026-07-06

* Added [Quickstart](/developers/adk/get-started/quickstart) — a single page to get an authenticated call working before touching contract code.
* Filled in the previously-empty [ADK Tour](/developers/adk/overview/adk-tour) and [Agent Auth](/developers/adk/overview/agent-auth-adk) pages.
* Added this [Changelog](/developers/adk/changelog) and the [SDK & API Reference](/developers/adk/reference) page.
* Fixed a duplicate "Step 4" between the Invoke and Test walkthrough pages.
* Expanded [Common Errors](/developers/adk/tips/common-errors) with generic-HTTP-500 triage guidance and a table of common integration gotchas (tenant DID double-encoding, `baseUrl` handling).
* Added a warning about contract version-shadowing on re-registration to [Register your TEE contract](/developers/adk/get-started/walkthrough/register-contract).

## SDK

<Info>
  Hackathon integrations have referenced `@terminal3/t3n-sdk` versions `3.5.2`, `3.9.0`, and `3.11.0` in the wild. We haven't cross-checked these against an official release history yet, so we're not listing per-version changes here until we can confirm them — a placeholder is worse than an honest gap.
</Info>