Change status to Public Preview in README

Updated README to reflect the change from Private to Public Preview status and improved wording for clarity.

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright GitHub, Inc.
+Copyright (c) 2025 GitHub
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -4,7 +4,7 @@
 
 This repository provides a standalone Go client for the GitHub Actions **Runner Scale Set** APIs. It is extracted from the `actions-runner-controller` project so that platform teams, integrators, and infrastructure providers can build **their own custom autoscaling solutions** for GitHub Actions runners.
 
-You do *not* need to adopt the full controller (and Kubernetes) to take advantage of scale sets. This package contains all the primitives you need: create/update/delete scale sets, generate just‑in‑time (JIT) runner configs, and manage message sessions.
+You don't need to adopt the full controller or Kubernetes to take advantage of scale sets. The client supports the same platforms as the GitHub Actions runner, including containers and virtual machines running Windows, Linux, and macOS. This package contains all the primitives you need: create, update, and delete scale sets; generate just-in-time (JIT) runner configs; and manage message sessions.
 
 ---
 
@@ -12,7 +12,7 @@ You do *not* need to adopt the full controller (and Kubernetes) to take advantag
 
 A runner scale set is a group of self-hosted runners that autoscales based on workflow demand. Here's how it works:
 
-1. **Registration**: You create a scale set with a name, which also serves as the label workflows use to target it (e.g., `runs-on: my-scale-set`). Multiple labels can be assigned per scale set. Like regular self-hosted runners, scale sets can be registered at the repository, organization, or enterprise level.
+1. **Registration**: You create a scale set with a name, which also serves as the label workflows use to target it (e.g., `runs-on: my-scale-set`). Like regular self-hosted runners, scale sets can be registered at the repository, organization, or enterprise level.
 2. **Polling**: Your scale set client continuously polls the API, reporting its maximum capacity (how many runners it can produce).
 3. **Job matching**: GitHub matches jobs to your scale set based on the label and runner group policies, just like regular self-hosted runners.
 4. **Scaling signal**: The API responds with how many runners your scale set needs online (`statistics.TotalAssignedJobs`).

client.go

@@ -126,9 +126,9 @@ type ProxyFunc func(req *http.Request) (*url.URL, error)
 type SystemInfo struct {
 	// System is the name of the scale set implementation
 	System string `json:"system"`
-	// Version is the version of the client
+	// Version is the version of the controller
 	Version string `json:"version"`
-	// CommitSHA is the git commit SHA of the client
+	// CommitSHA is the git commit SHA of the controller
 	CommitSHA string `json:"commit_sha"`
 	// ScaleSetID is the ID of the scale set
 	ScaleSetID int `json:"scale_set_id"`
@@ -222,7 +222,6 @@ type userAgent struct {
 	SystemInfo
 	BuildVersion   string `json:"build_version"`
 	BuildCommitSHA string `json:"build_commit_sha"`
-	Kind           string `json:"kind"`
 }
 
 func (c *Client) newGitHubAPIRequest(ctx context.Context, method, path string, body io.Reader) (*http.Request, error) {

common_client.go

@@ -137,7 +137,6 @@ func (c *commonClient) setUserAgent() {
 		SystemInfo:     c.systemInfo,
 		BuildVersion:   buildInfo.version,
 		BuildCommitSHA: buildInfo.commitSHA,
-		Kind:           "scaleset",
 	})
 	c.userAgent = string(b)
 }

common_client_test.go

@@ -124,7 +124,6 @@ func TestUserAgent(t *testing.T) {
 		SystemInfo:     testSystemInfo,
 		BuildCommitSHA: sha,
 		BuildVersion:   version,
-		Kind:           "scaleset",
 	}
 	b, err := json.Marshal(wantInfo)
 	require.NoError(t, err, "failed to marshal expected user agent")
@@ -145,7 +144,6 @@ func TestUserAgent(t *testing.T) {
 		SystemInfo:     userAgentInfo,
 		BuildCommitSHA: sha,
 		BuildVersion:   version,
-		Kind:           "scaleset",
 	}
 	b, err = json.Marshal(wantInfo)
 	require.NoError(t, err, "failed to marshal expected user agent after SetSystemInfo")