Add documentation for design meetings

This PR adds documentation and process outlines for the public design
meetings that we will begin holding next week.

.github/ISSUE_TEMPLATE/agenda_item.md

@@ -0,0 +1,19 @@
+---
+name: Design Meeting Agenda Item
+about: Add an item to the next Design Meeting agenda
+title: ''
+labels: ['Design Meeting']
+assignees: ['llvm-beanz', 'farzonl']
+
+---
+
+**Does the agenda item relate to an existing proposal or specification language?**
+Please link the file in the repo where the problem is documented.
+
+**Describe the issue or outstanding question.**
+This can be as short as a question that needs answering or as complex as needed
+to convey the problem that needs solving.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.
+

README.md

@@ -26,6 +26,13 @@ This project has adopted the [Microsoft Open Source Code of Conduct](https://ope
 For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
 contact [[email protected]](mailto:[email protected]) with any additional questions or comments.
 
+## Public Design Meeting
+
+The HLSL team organizes a meeting every two weeks which is open to the public to discuss work in progress in this repository.
+That includes proposals for new HLSL features as well as the ongoing work to write a language specification.
+
+For more information on this meeting see the [Design Meeting](docs/DesignMeeting.md) documentation.
+
 ## Trademarks
 
 This project may contain trademarks or logos for projects, products, or services. Authorized use of Microsoft 

docs/DesignMeeting.md

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+# Design Meeting
+
+> Notice: By participating in this meeting you are agreeing that all
+> contributions you make on your own behalf or on behalf of your employer are
+> subject to the terms of the
+> [Microsoft Open Source Contributor License Agreement](https://opensource.microsoft.com/cla/).
+
+Public design meetings are held every other week (cancelling for holidays).
+During these meetings the facilitator will iterate through PRs, issues and other
+agenda topics to ensure forward progress and facilitate discussion.
+
+The meetings are facilitated by [Chris Bieneman](https://github.com/llvm-beanz)
+and [Farzon Lotfi](https://github.com/farzonl).
+
+Meeting minutes will be posted into the [Meeting Minutes](docs/DesignMeetingMinutes)
+folder of this repository following the [template](docs/DesignMeetingMinutes/Template.md).
+
+## Adding Agenda Items
+
+If there is an existing Issue or Pull Request you would like to discuss at the
+next design meeting please add the
+[Design Meeting](https://github.com/microsoft/hlsl-specs/labels/Design%20Meeting)
+label. Issues and Pull Requests with the Design Meeting label will be given priority
+during the meeting.
+
+If there is not an existing Issue or Pull request. File an issue with the
+[Design Meeting Agenda Item](https://github.com/microsoft/hlsl-specs/issues/new?template=agenda_item.md)
+template.
+
+## Attending the Meeting
+
+The design meeting is held using Microsoft Teams.
+
+If you wish to attend the meeting for an individual occurrence or on a recurring
+basis, email [Ask HLSL @ Microsoft](mailto:[email protected]). Please
+specify whether you want the recurring invite or a specific occurrence.

docs/DesignMeetingMinutes/Template.md

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+# Design Meeting Minutes: YYYY/MM/DD
+
+> Notice: By participating in this meeting you are agreeing that all
+> contributions you make on your own behalf or on behalf of your employer are
+> subject to the terms of the
+> [Microsoft Open Source Contributor License Agreement](https://opensource.microsoft.com/cla/).
+

docs/DesignMeetingMinutes/index.md

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+# Meeting Minute Index
+
+{% assign doclist = site.pages | sort: 'url'  %}
+{% for doc in doclist %}
+{% if doc.name contains '.md' and doc.dir == '/docs/DesignMeetingMinutes/' and doc.name != 'index.md' %}
+* [{{ doc.name }}]({{ doc.url | relative_url }})
+{% endif %}
+{% endfor %}