fix(builder): keep every game's name and code out of the builder

The builder must be game-agnostic, but its prompts named games: AUTHORING.md
(the model's rules) used three games as examples, the research prompt listed
two games' editions, the schema described containerUser by one game's image,
and every draft prompt included two real templates from the repo, so the
model saw, and could copy, other games' commands and options.

- AUTHORING.md, the research prompt and the schema describe the rules without
  naming a game.
- The draft prompt's format example is now one invented server (no real
  command, options, ports or app id), checked by
  TestExampleTemplateFollowsTheRules against validation and the draft checks.
- Comments, help texts, BUILDER.md and test fixtures use invented names and
  values.
- TestBuilderIsGameAgnostic reads every game's name and id from games/ and
  fails if any appears in the builder's code, tests, rules, schemas or docs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

cmd/gbrgames/inspect_test.go

@@ -21,7 +21,7 @@ func TestEnvNameMatchesNodeAgent(t *testing.T) {
 	}
 }
 
-// Probe output as ARK's image produces it (trimmed)
+// Probe output of an image built around its own user (trimmed)
 const arkProbe = probeMarker + ` passwd
 root:x:0:0:root:/root:/bin/bash
 gameserver:x:25000:25000::/home/gameserver:/bin/bash
@@ -34,7 +34,7 @@ bash|/usr/bin/bash
 ` + probeMarker + ` script /usr/bin/start_server
 #!/bin/bash
 cd /home/gameserver/steamcmd
-echo "$ASA_START_PARAMS ${ENABLE_DEBUG} $HOME"
+echo "$START_PARAMS ${ENABLE_DEBUG} $HOME"
 `
 
 func arkFacts() *imageFacts {
@@ -55,7 +55,7 @@ func TestProbeParsing(t *testing.T) {
 	if !strings.Contains(f.Scripts["/usr/bin/start_server"], "steamcmd") {
 		t.Fatalf("script not captured: %q", f.Scripts)
 	}
-	if want := []string{"ASA_START_PARAMS", "ENABLE_DEBUG"}; !reflect.DeepEqual(f.EnvRead, want) {
+	if want := []string{"ENABLE_DEBUG", "START_PARAMS"}; !reflect.DeepEqual(f.EnvRead, want) {
 		t.Errorf("envRead = %v, want %v (HOME is common and left out)", f.EnvRead, want)
 	}
 }
@@ -63,7 +63,7 @@ func TestProbeParsing(t *testing.T) {
 func TestSuggestContainerUser(t *testing.T) {
 	// Locked home owned by another uid: use that account, with its own group
 	if f := arkFacts(); f.SuggestedContainerUser != "25000:25000" {
-		t.Errorf("ARK: suggested %q, want 25000:25000", f.SuggestedContainerUser)
+		t.Errorf("suggested %q, want 25000:25000", f.SuggestedContainerUser)
 	}
 
 	// uid 1000 images need nothing
@@ -92,9 +92,9 @@ func TestCheckTemplate(t *testing.T) {
 	f := arkFacts()
 	game := map[string]any{
 		"defaultConfig": map[string]any{"RCONPort": 27020, "MaxPlayers": 70},
-		// Mirrors ARK's old command: ASA_START_PARAMS is assigned, SERVER_MAP has a default, RCON_PORT is the
+		// A command where START_PARAMS is assigned, SERVER_MAP has a default, RCON_PORT is the
 		// misnamed one, MAX_PLAYERS is set by a setting, MISSING has no default at all
-		"defaultStartupCommand": `export ASA_START_PARAMS="${ASA_START_PARAMS:-${SERVER_MAP:-TheIsland}?RCONPort=${RCON_PORT:-27020} -Max=${MAX_PLAYERS:-70} ${MISSING}}"`,
+		"defaultStartupCommand": `export START_PARAMS="${START_PARAMS:-${SERVER_MAP:-DefaultMap}?RCONPort=${RCON_PORT:-27020} -Max=${MAX_PLAYERS:-70} ${MISSING}}"`,
 	}
 	problems, _ := checkTemplate(game, f)
 	joined := strings.Join(problems, "\n")
@@ -103,7 +103,7 @@ func TestCheckTemplate(t *testing.T) {
 			t.Errorf("missing problem %q in:\n%s", want, joined)
 		}
 	}
-	for _, unwanted := range []string{"ASA_START_PARAMS", "SERVER_MAP", "MAX_PLAYERS}"} {
+	for _, unwanted := range []string{"START_PARAMS", "SERVER_MAP", "MAX_PLAYERS}"} {
 		if strings.Contains(joined, unwanted) {
 			t.Errorf("false problem about %s in:\n%s", unwanted, joined)
 		}
@@ -114,7 +114,7 @@ func TestCheckTemplate(t *testing.T) {
 
 	// With the fixes, only the deliberately missing variable is left; 25000:1000 counts (same uid)
 	game["containerUser"] = "25000:1000"
-	game["defaultStartupCommand"] = `export ASA_START_PARAMS="${ASA_START_PARAMS:-x}?RCONPort=${RCONPORT:-27020}"`
+	game["defaultStartupCommand"] = `export START_PARAMS="${START_PARAMS:-x}?RCONPort=${RCONPORT:-27020}"`
 	if problems, _ := checkTemplate(game, f); len(problems) != 0 {
 		t.Errorf("fixed template still has problems: %v", problems)
 	}