[llvm] [QualGroup][docs] Document decision-taking process and refresh sync-up materials (PR #163122)

[Zaky Hermawan via llvm-commits]

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@@ -181,6 +181,46 @@ Membership Review
 
 To ensure the group remains active and focused, member participation will be reviewed every six months. Inactive members may be removed following this review.
 
+Decision Taking
+---------------
+
+The LLVM Qualification Working Group aims to make decisions transparently, collaboratively, and without unnecessary formality. The goal is to maintain efficiency while encouraging broad participation and mutual understanding.
+
+This section describes the lightweight process used to handle proposals and decisions within the group. It may be revised as the group evolves and gains experience.
+
+Principles
+^^^^^^^^^^
+
+* **Consensus first:** The preferred mode of decision-making is consensus through open discussion (primarily on Discord or during sync-up meetings).
+* **Inclusiveness and respect:** All viewpoints are encouraged, and members are expected to contribute constructively toward reaching a shared understanding.
+* **Transparency:** Discussions leading to a decision should be visible to the group and, whenever appropriate, summarized in public channels (e.g., Discourse meeting notes, Discord channel, documentation updates).
+
+Consensus and Time Limits
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Discussions remain open until a clear consensus emerges, meaning no sustained objections have been raised after reasonable discussion.
+
+To prevent open-ended debates, if no new viewpoints are expressed after an agreed period (e.g., 2 weeks), the chair (or moderator) may:
+
+* **Summarize the apparent consensus** and close the discussion, or
+* **Postpone the topic** to the next sync-up meeting if the outcome remains unclear, or
+* **Call for a short vote** to confirm the group’s position.
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ZakyHermawan wrote:

I think we should clarify who the chair/moderator is. If there isn't an official one, I suggest that the person who starts the thread should be responsible for taking one of these three actions if the discussion stalls for the agreed-upon period.

https://github.com/llvm/llvm-project/pull/163122