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Long-Term Stable (lts) Release Channel

The lts release channel provides a previous stable build for one-month intervals. On the second Monday of each month, the current stable release is promoted to lts. This channel is not recommended for all AMP publishers. It is provided so that publishers who wish to perform a QA cycle on their website less frequently may do so by opting specific web pages into the lts channel.

In the event that the second Monday of the month falls during a release freeze (such as on one of the major US holidays), the promotion will be performed after the end of the release freeze.

Note: The lts release channel is available only to AMP Websites and AMP Stories; it is not available to AMP Email or AMP Ads.

How to Opt-In

Standard AMP HTML runtime and extension scripts

Note: recommended for most sites

<script async src="https://cdn.ampproject.org/v0.js"></script>
<script
  async
  custom-element="amp-ad"
  src="https://cdn.ampproject.org/v0/amp-ad-0.1.js"
></script>

LTS AMP HTML runtime and extension scripts

<script async src="https://cdn.ampproject.org/lts/v0.js"></script>
<script
  async
  custom-element="amp-ad"
  src="https://cdn.ampproject.org/lts/v0/amp-ad-0.1.js"
></script>

While it is a requirement that the same version is used for the runtime and extension scripts, requesting lts is valid AMP. It will get the same cache benefits as the stable release channel.

Important: Publishers using the lts release channel should be careful when using newly introduced features. Because of the longer cycle, the lts release may be as much as seven weeks behind the HEAD of ampproject/amphtml. See the section on determining if your change is in a release to validate if a change will be ready with your chosen release cycle.