talk about the flagship goal selection process

Author: Niko Matsakis

src/2024h2/flagship.md

@@ -1,3 +1,5 @@
 # Flagship goals
 
+[Learn about flagship goals.](../about/flagship_goals.md)
+
 <!-- FLAGSHIP GOALS -->

src/2025h1/goals.md

@@ -8,7 +8,7 @@ This page lists the <!-- #GOALS --> project goals **proposed** for 2025h1.
 
 ## Flagship goals
 
-Flagship goals represent the goals expected to have the broadest overall impact. 
+Flagship goals represent the goals expected to have the broadest overall impact. [Learn about flagship goals.](../about/flagship_goals.md)
 
 <!-- FLAGSHIP GOALS -->
 

src/SUMMARY.md

@@ -18,6 +18,7 @@
 # 📖 Learn about
 
 - [Goal motivations](./about/motivation.md)
+- [Flagship goals](./about/flagship_goals.md)
 - [Invited goals](./about/invited_goals.md)
 - [Point of contact](./about/poc.md)
 - [Task owners](./about/owners.md)

src/about/flagship_goals.md

@@ -0,0 +1,9 @@
+# Flagship goals
+
+Each time period, the goal program owner selects a small set of the proposed goals (typically 2-3) as **flagship goals**. These goals are highlighted specially.
+
+The criteria for a goal to be considered as a flagship goal:
+
+* **Tell a story:** Flagship goals further some aspect of Rust's story that we want to be better understood.
+* **Broad impact and interest:** Flagship goals should be impactful and/or interesting to a broad swath of Rust's user base.
+* **Take time:** While not required, it is common that flagship goals take multiple goal sessions to complete. Therefore, the flagship goals often continue from goal period to goal period.