D&D: import Open5e SRD bestiary as a raw staging table

fetch|gen bestiary subcommands vendor data/open5e/monsters.json (322
SRD monsters) and generate bestiary_srd_data.go — all 322 as raw SRD
stat blocks (HP/AC/ability scores/CR + per-attack damage dice).

This is a balance-baseline reference, not an engine roster: raw SRD
damage one-shots the solo player, so nothing here feeds combat. It's
what the future tuning pass reads against when deriving dndBestiary /
srdProfiles entries. XP is derived from CR (Open5e has no XP field).

internal/plugin/bestiary_srd_data_test.go

@@ -0,0 +1,68 @@
+package plugin
+
+import "testing"
+
+// TestSRDStagingBestiary_Populated guards the generated raw SRD staging table:
+// the full SRD dump should be present and structurally sane. Regenerate with
+// `go run ./cmd/open5e-import (fetch|gen) bestiary` if the SRD set changes.
+func TestSRDStagingBestiary_Populated(t *testing.T) {
+	if len(srdStagingBestiary) < 300 {
+		t.Fatalf("srdStagingBestiary has %d entries, want the full SRD set (~322)", len(srdStagingBestiary))
+	}
+
+	for slug, m := range srdStagingBestiary {
+		if m.Slug != slug {
+			t.Errorf("%s: Slug field = %q, want map key", slug, m.Slug)
+		}
+		if m.Name == "" {
+			t.Errorf("%s: empty Name", slug)
+		}
+		if m.HP <= 0 || m.AC <= 0 {
+			t.Errorf("%s: HP=%d AC=%d, want both positive", slug, m.HP, m.AC)
+		}
+		for _, a := range m.Attacks {
+			// AvgDamage is precomputed; a parsed attack should carry dice and a
+			// non-negative average (flat negative bonuses can zero it, not less).
+			if a.DamageDice == "" {
+				t.Errorf("%s: attack %q has no DamageDice", slug, a.Name)
+			}
+			if a.AvgDamage < 0 {
+				t.Errorf("%s: attack %q AvgDamage=%d, want >= 0", slug, a.Name, a.AvgDamage)
+			}
+		}
+	}
+}
+
+// TestSRDStagingBestiary_KnownEntry spot-checks a canonical stat block so a
+// classifier regression surfaces as a value mismatch, not a silent drift.
+func TestSRDStagingBestiary_KnownEntry(t *testing.T) {
+	ab, ok := srdStagingBestiary["aboleth"]
+	if !ok {
+		t.Fatal("aboleth missing from staging bestiary")
+	}
+	if ab.HP != 135 || ab.AC != 17 || ab.CR != 10 {
+		t.Errorf("aboleth = HP %d / AC %d / CR %v, want 135 / 17 / 10", ab.HP, ab.AC, ab.CR)
+	}
+	if ab.XP != 5900 {
+		t.Errorf("aboleth XP = %d, want 5900 (derived from CR 10)", ab.XP)
+	}
+	if ab.Multiattack == "" {
+		t.Error("aboleth should have a Multiattack description")
+	}
+	if !ab.Legendary {
+		t.Error("aboleth should be flagged Legendary")
+	}
+	// Tentacle: +9 to hit, 2d6+5 → avg 12.
+	var tentacle *SRDStatAttack
+	for i := range ab.Attacks {
+		if ab.Attacks[i].Name == "Tentacle" {
+			tentacle = &ab.Attacks[i]
+		}
+	}
+	if tentacle == nil {
+		t.Fatal("aboleth missing Tentacle attack")
+	}
+	if tentacle.AttackBonus != 9 || tentacle.DamageDice != "2d6" || tentacle.AvgDamage != 12 {
+		t.Errorf("aboleth Tentacle = %+v, want +9 / 2d6 / avg 12", *tentacle)
+	}
+}