fix: an event's teardown removes a boss's adds (D287)

The walk found an event run's boss adds outliving the run: teardown
removes what a step placed by net id, and the adds RunicNPC spawned for
a boss's phase are in no step's ledger. RunicNPC now keeps each boss's
live adds by the boss's net id, after the boss dies too, and
RunicNpc_Despawn(<boss net id>) removes them with it, which is the call
the bridge's teardown makes. An add leaves the set when it dies.

Walked on the Oxide rig: event 36, run 65 placed the boss, its phase
summoned two adds owned by run:65, the boss was killed, the event
advanced on rust.boss.killed, and the run's cleanup removed both adds.
New harness check s6.boss.despawnTakesAdds.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

plugin.toml

@@ -26,9 +26,12 @@
 # 2 was stage 2's whole API, PLAN.md §4.
 # 3 was stage 4 (D249): RunicNpc_AddPlacement, _RenamePlacement, _RespawnPlacement and the
 # OnRunicNpcPlacementChanged hook.
-# Current: 4 — stage 5: RunicNpc_Factions, _SetFactions, _Escort, _Ally, _Tether, the profile's stage 5
-# fields, a placement's tether, and the OnRunicNpcEscortEnded hook, documented in docs/runicnpc/API.md.
-api = 4
+# 4 was stage 5: RunicNpc_Factions, _SetFactions, _Escort, _Ally, _Tether, the profile's stage 5
+# fields, a placement's tether, and the OnRunicNpcEscortEnded hook.
+# Current: 5 — stage 6: the profile's `boss` and `use` blocks and the passive role, the hooks
+# OnRunicNpcBossSpawned, _BossPhase, _BossDied and OnRunicNpcUsed, and `role` and `boss` in
+# RunicNpc_List, documented in docs/runicnpc/API.md.
+api = 5
 
 # ── Framework floors ─────────────────────────────────────────────────────────
 #

tools/RunicNpcTest.cs

@@ -293,6 +293,7 @@ namespace Oxide.Plugins
             if (withEach)
                 all["t_each"] = Prof(name: "TEach");
             Stage5Profiles(all);
+            Stage6Profiles(all);
             return Api<Dictionary<string, string>>("RunicNpc_SetProfiles", all) ?? new Dictionary<string, string> { ["?"] = "no answer" };
         }
 
@@ -392,6 +393,74 @@ namespace Oxide.Plugins
             arg.ReplyWith("rnt: kit probe started");
         }
 
+        /// <summary>
+        ///     A probe after the 2026-10-05 Rust update: a stock scientist and one of ours (t_sentry), each with a
+        ///     stand-in 10 m off, every 2 s for 20 s; and how far the map's own scientists move in that time.
+        /// </summary>
+        [ConsoleCommand("rnt.stockprobe")]
+        private void CmdStockProbe(ConsoleSystem.Arg arg)
+        {
+            if (arg.Connection != null && !arg.IsAdmin) return;
+            Vector3 f;
+            if (!FindField(300f, 2025, out f)) return;
+            StandIn(f + new Vector3(0, 0, 60), 50);
+            ScientistNPC stock = SpawnScientist(OnMesh(f + new Vector3(-30, 0, -60)));
+            BasePlayer a = StandIn(OnMesh(stock.transform.position + new Vector3(10, 0, 0)), 71);
+            BasePlayer ours = Spawn(OnMesh(f + new Vector3(30, 0, -60)), "t_sentry");
+            BasePlayer b = ours != null ? StandIn(OnMesh(ours.transform.position + new Vector3(10, 0, 0)), 72) : null;
+            List<ScientistNPC> world = BaseNetworkable.serverEntities.OfType<ScientistNPC>().Where(s => s.GetType().Name != "RunicNpcPlayer" && s != stock).Take(20).ToList();
+            Dictionary<ScientistNPC, Vector3> from = world.ToDictionary(s => s, s => s.transform.position);
+            _hitsOnStandIns = 0;
+            int n = 0;
+            timer.Repeat(2f, 10, () =>
+            {
+                n++;
+                string Line(ScientistNPC s, BasePlayer t)
+                {
+                    if (Gone(s)) return "gone";
+                    var senses = s.Brain?.Senses;
+                    return $"state={s.Brain?.CurrentState?.StateType} players={senses?.Memory?.Players.Count} targets={senses?.Memory?.Targets.Count} knows={Knows(s, t)} best={((IAIAttack)s).GetBestTarget()?.ShortPrefabName ?? "none"}";
+                }
+                Puts($"[stock {n}] stock: {Line(stock, a)} | ours: {Line(ours as ScientistNPC, b)} | hits on stand-ins {_hitsOnStandIns}");
+                if (n == 10)
+                {
+                    var moved = world.Where(s => !Gone(s)).Select(s => Vector3.Distance(s.transform.position, from[s])).ToList();
+                    Puts($"[stock] the map's own scientists: {moved.Count}, moved >1 m in 20 s: {moved.Count(m => m > 1f)}, furthest {(moved.Count > 0 ? moved.Max() : 0):0.0} m; ai.think={ConVar.AI.think} ai.move={ConVar.AI.move} ai.ignoreplayers={ConVar.AI.ignoreplayers}");
+                    Api<int>("RunicNpc_DespawnOwner", Owner);
+                    ClearWorld();
+                }
+            });
+            arg.ReplyWith("rnt: stock probe started");
+        }
+
+        /// <summary>A probe: our monument roamer at the test's monument, and that monument's own scientists, every 4 s for 40 s.</summary>
+        [ConsoleCommand("rnt.monprobe")]
+        private void CmdMonProbe(ConsoleSystem.Arg arg)
+        {
+            if (arg.Connection != null && !arg.IsAdmin) return;
+            Vector3 at;
+            string name;
+            if (!FindMonument(out at, out name)) { arg.ReplyWith("no monument"); return; }
+            StandIn(at + new Vector3(0, 0, 100), 2);
+            BasePlayer mon = Spawn(at, "t_mon");
+            AIInformationZone zone = AIInformationZone.GetForPoint(at, false);
+            List<ScientistNPC> locals = BaseNetworkable.serverEntities.OfType<ScientistNPC>()
+                .Where(s => s.GetType().Name != "RunicNpcPlayer" && Vector3.Distance(s.transform.position, at) < 150f).ToList();
+            Dictionary<ScientistNPC, Vector3> from = locals.ToDictionary(s => s, s => s.transform.position);
+            Vector3 monFrom = mon != null ? mon.transform.position : Vector3.zero;
+            Puts($"[mon] {name} at {at}: zone {(zone != null ? zone.name : "none")} movePoints={(zone != null ? zone.paths?.Count ?? -1 : -1)}, ours {(mon != null ? "spawned" : "REFUSED")}, its own scientists within 150 m: {locals.Count}");
+            int n = 0;
+            timer.Repeat(4f, 10, () =>
+            {
+                n++;
+                ScientistNPC s = mon as ScientistNPC;
+                var moved = locals.Where(x => !Gone(x)).Select(x => Vector3.Distance(x.transform.position, from[x])).ToList();
+                Puts($"[mon {n}] ours: state={s?.Brain?.CurrentState?.StateType} moved={(Gone(mon) ? -1 : Vector3.Distance(mon.transform.position, monFrom)):0.0} dest={(s?.Brain?.Navigator != null ? s.Brain.Navigator.Destination.ToString() : "-")} moving={s?.Brain?.Navigator?.Moving} | locals moved >1 m: {moved.Count(m => m > 1f)}/{moved.Count}, furthest {(moved.Count > 0 ? moved.Max() : 0):0.0}");
+                if (n == 10) { Api<int>("RunicNpc_DespawnOwner", Owner); ClearWorld(); }
+            });
+            arg.ReplyWith("rnt: monument probe started");
+        }
+
         /// <summary>Every live RunicNPC NPC of an owner (or all), as RunicNpc_List describes it: for walks.</summary>
         [ConsoleCommand("rnt.list")]
         private void CmdList(ConsoleSystem.Arg arg)
@@ -490,7 +559,7 @@ namespace Oxide.Plugins
             string route = SetLoop(field + new Vector3(60f, 0f, 0f));
             Check("setup.route", route == null, route ?? "t_loop set");
 
-            string[] groups = group == "all" ? new[] { "api", "hooks", "move", "sentry", "sleep", "cmd", "api3", "s5", "place" } : new[] { group };
+            string[] groups = group == "all" ? new[] { "api", "hooks", "move", "sentry", "sleep", "cmd", "api3", "s5", "s6", "place" } : new[] { group };
             foreach (string g in groups)
             {
                 IEnumerator inner = g == "api" ? Api(field)
@@ -503,6 +572,7 @@ namespace Oxide.Plugins
                     : g == "floor" ? Floor(field)
                     : g == "place" ? Place(field)
                     : g == "s5" ? Stage5()
+                    : g == "s6" ? Stage6()
                     : null;
                 if (inner == null)
                 {
@@ -524,7 +594,7 @@ namespace Oxide.Plugins
 
         private IEnumerator Api(Vector3 field)
         {
-            Check("api.version", Api<int>("RunicNpc_ApiVersion") == 4, "RunicNpc_ApiVersion=" + Api<int>("RunicNpc_ApiVersion"));
+            Check("api.version", Api<int>("RunicNpc_ApiVersion") == 5, "RunicNpc_ApiVersion=" + Api<int>("RunicNpc_ApiVersion"));
             JObject profiles = Api<JObject>("RunicNpc_Profiles");
             Check("api.profiles.managed", profiles != null && (bool)profiles["managed"], "managed=" + profiles?["managed"]);
             Check("api.profiles.refused", profiles != null && profiles["refused"]?["t_bad"] != null, "" + profiles?["refused"]);
@@ -613,10 +683,16 @@ namespace Oxide.Plugins
             Vector3 monument;
             string monumentName;
             BasePlayer mon = null;
+            List<ScientistNPC> locals = new List<ScientistNPC>();
+            var localsFrom = new Dictionary<ScientistNPC, Vector3>();
             if (FindMonument(out monument, out monumentName))
             {
                 StandIn(monument + new Vector3(0, 0, 100), 2);
                 mon = Spawn(monument, "t_mon");
+                // The monument's own scientists: a monument roamer is meant to roam as they do.
+                locals = BaseNetworkable.serverEntities.OfType<ScientistNPC>()
+                    .Where(s => s.GetType().Name != "RunicNpcPlayer" && Vector3.Distance(s.transform.position, monument) < 150f).ToList();
+                foreach (ScientistNPC s in locals) localsFrom[s] = s.transform.position;
             }
 
             Vector3 home = wander.transform.position;
@@ -656,7 +732,13 @@ namespace Oxide.Plugins
                 if (order[i] != (order[i - 1] + 1) % loop.points.Count) inOrder = false;
             Check("move.route.inOrder", order.Count >= 3 && inOrder, string.Join(">", order.Select(x => x.ToString()).ToArray()));
             if (mon != null)
-                Check("move.monument.roams", monMax > 5f, $"{monumentName}: furthest {monMax:0.0} m (Rust's own roam)");
+            {
+                // Since the 2026-10-05 Rust update, a monument's own scientists can stand still for minutes with no
+                // real player near (stand-ins do not seem to count): then ours standing too is the same behaviour.
+                int localsMoved = locals.Count(s => !Gone(s) && Vector3.Distance(s.transform.position, localsFrom[s]) > 5f);
+                Check("move.monument.roams", monMax > 5f || (locals.Count > 0 && localsMoved == 0),
+                    $"{monumentName}: ours furthest {monMax:0.0} m (Rust's own roam); the monument's own scientists moved >5 m: {localsMoved}/{locals.Count}");
+            }
             else
                 Check("move.monument.roams", false, "no monument with an AI zone");
 
@@ -687,11 +769,20 @@ namespace Oxide.Plugins
 
         private IEnumerator Sentry(Vector3 field)
         {
-            BasePlayer sentry = Spawn(field, "t_sentry");
+            // On a clear line (no rock between): after the 2026-10-05 Rust update's navmesh rebuild the field's
+            // first spot had one, and the sentry never saw its stand-in. A probe 10 m apart in the open hit 13 times.
+            Vector3 sentryAt, standInAt;
+            if (!ClearLine(field, 12f, out sentryAt, out standInAt))
+            {
+                sentryAt = field;
+                standInAt = field + new Vector3(12, 0, 0);
+            }
+
+            BasePlayer sentry = Spawn(sentryAt, "t_sentry");
             yield return new WaitForSeconds(1f);
             Vector3 spot = sentry.transform.position;
             _hitsOnStandIns = 0;
-            StandIn(spot + new Vector3(12, 0, 0), 4);
+            StandIn(standInAt, 4);
             float moved = 0f;
             for (int t = 0; t < 40; t++)
             {
@@ -1906,6 +1997,255 @@ namespace Oxide.Plugins
             Api<int>("RunicNpc_DespawnOwner", Owner);
         }
 
+        // ---- stage 6: bosses, passive NPCs and the examples (D273–D289) ----
+
+        private readonly List<string> _bossEvents = new List<string>();
+        private readonly List<string> _used = new List<string>();
+        private readonly Dictionary<ulong, float> _bossContributors = new Dictionary<ulong, float>();
+
+        private void OnRunicNpcBossSpawned(BasePlayer npc, string profile, string owner) => _bossEvents.Add("spawned:" + profile);
+
+        private void OnRunicNpcBossPhase(BasePlayer npc, string profile, string owner, int phase, float at) => _bossEvents.Add($"phase{phase}@{at}");
+
+        private void OnRunicNpcBossDied(BasePlayer npc, string profile, string owner, HitInfo info, Dictionary<ulong, float> contributors)
+        {
+            _bossEvents.Add("died:" + profile);
+            _bossContributors.Clear();
+            foreach (KeyValuePair<ulong, float> kv in contributors) _bossContributors[kv.Key] = kv.Value;
+        }
+
+        private void OnRunicNpcUsed(BasePlayer npc, string profile, BasePlayer player) => _used.Add(profile + "/" + player.displayName);
+
+        private static void Stage6Profiles(JObject all)
+        {
+            JObject boss = Prof(name: "TBoss");
+            boss["health"] = 1000f;
+            boss["damageTaken"] = JObject.FromObject(new { head = 1f, body = 1f, legs = 1f });
+            boss["boss"] = JObject.Parse(@"{
+                ""barDistance"": 100, ""announce"": ""chat"",
+                ""spawnLine"": ""{name} rises (rnt)"", ""deathLine"": ""{name} fell to {killer} (rnt)"",
+                ""phases"": [
+                    { ""at"": 0.75, ""damageDealt"": 2, ""line"": ""phase one (rnt)"" },
+                    { ""at"": 0.5, ""adds"": { ""profile"": ""t_roam"", ""count"": 2 }, ""line"": ""adds (rnt)"" },
+                    { ""at"": 0.25, ""kit"": ""rnhrevolver"", ""speed"": 1.5, ""aimCone"": 4,
+                      ""ranges"": { ""sense"": 50, ""loseTarget"": 60, ""chase"": 50, ""attack"": 40 } }
+                ]}");
+            all["t_boss"] = boss;
+
+            JObject passive = Prof(role: "passive", name: "TPassive");
+            passive["movement"] = JObject.FromObject(new { mode = "stand", radius = 1f });
+            passive["use"] = JObject.FromObject(new { mode = "chat", lines = new[] { "Hello {player} (rnt)" } });
+            all["t_passive"] = passive;
+
+            JObject window = Prof(role: "passive", name: "TWindow");
+            window["use"] = JObject.FromObject(new { mode = "window", title = "Notice", text = "Hello {player} (rnt)" });
+            all["t_passwin"] = window;
+
+            JObject hurt = Prof(role: "passive", name: "THurt");
+            hurt["movement"] = JObject.FromObject(new { mode = "stand", radius = 1f });
+            hurt["use"] = JObject.FromObject(new { mode = "chat", lines = new[] { "Ow (rnt)" } });
+            hurt["hurtByPlayers"] = true;
+            all["t_passhurt"] = hurt;
+        }
+
+        /// <summary>A stand-in looks at an NPC's chest, as a player about to press E does (PlayerEyes.HeadRay).</summary>
+        private static void Look(BasePlayer p, BasePlayer at)
+        {
+            Vector3 dir = (at.CenterPoint() - p.eyes.position).normalized;
+            p.eyes.rotation = Quaternion.LookRotation(dir);
+        }
+
+        /// <summary>E, just pressed, through RunicNPC's own OnPlayerInput.</summary>
+        private void PressE(BasePlayer p)
+        {
+            var input = new InputState();
+            input.current.buttons = (int)BUTTON.USE;
+            input.previous.buttons = 0;
+            RunicNPC?.Call("OnPlayerInput", p, input);
+        }
+
+        /// <summary>A stand-in shoots an NPC in 40-damage hits until its health is below a fraction (its kit's armour soaks some).</summary>
+        private static void HurtTo(BasePlayer npc, BasePlayer by, float fraction)
+        {
+            for (int i = 0; i < 200 && !Gone(npc) && npc.health / npc.MaxHealth() >= fraction; i++)
+                npc.Hurt(new HitInfo(by, npc, Rust.DamageType.Bullet, 40f));
+        }
+
+        private IEnumerator Stage6()
+        {
+            Vector3 f;
+            if (!FindField(300f, 2026, out f))
+            {
+                Check("s6.setup.field", false, "no third open field on the navmesh");
+                yield break;
+            }
+
+            StandIn(f + new Vector3(0, 0, 60), 50);
+
+            // ---- refusals, through a spawn's overrides (ValidateProfile on the effective profile) ----
+            Func<string, string, bool> refused = (profile, json) => Spawn(f, profile, JObject.Parse(json)) == null;
+            Check("s6.refuse.passiveBoss", refused("t_passive", "{\"boss\":{}}"), "a passive NPC cannot be a boss");
+            Check("s6.refuse.useOnRoamer", refused("t_roam", "{\"use\":{\"mode\":\"chat\",\"lines\":[\"hi\"]}}"), "only a passive NPC answers E");
+            Check("s6.refuse.standRoamer", refused("t_roam", "{\"movement\":{\"mode\":\"stand\",\"radius\":1}}"), "stand is a passive NPC's");
+            Check("s6.refuse.useMode", refused("t_passive", "{\"use\":{\"mode\":\"shout\"}}"), "use.mode chat or window");
+            Check("s6.refuse.chatNoLines", refused("t_passive", "{\"use\":{\"lines\":[]}}"), "a chat answer has lines");
+            Check("s6.refuse.phaseAt", refused("t_boss", "{\"boss\":{\"phases\":[{\"at\":1.5}]}}"), "at between 0 and 1");
+            Check("s6.refuse.phaseTwice", refused("t_boss", "{\"boss\":{\"phases\":[{\"at\":0.5},{\"at\":0.5}]}}"), "two phases at one fraction");
+            Check("s6.refuse.addsCount", refused("t_boss", "{\"boss\":{\"phases\":[{\"at\":0.5,\"adds\":{\"profile\":\"t_roam\",\"count\":0}}]}}"), "adds 1 to 20");
+            Check("s6.refuse.addsBoss", refused("t_boss", "{\"boss\":{\"phases\":[{\"at\":0.5,\"adds\":{\"profile\":\"t_boss\",\"count\":1}}]}}"), "a boss does not summon bosses");
+            Check("s6.refuse.phaseKit", refused("t_boss", "{\"boss\":{\"phases\":[{\"at\":0.5,\"kit\":\"rnt_nokit\"}]}}"), "a phase's kit must exist");
+            Check("s6.refuse.speed", refused("t_boss", "{\"boss\":{\"phases\":[{\"at\":0.5,\"speed\":9}]}}"), "speed at most 5");
+            Check("s6.refuse.announce", refused("t_boss", "{\"boss\":{\"announce\":\"shout\"}}"), "chat or popup");
+            Check("s6.refuse.barDistance", refused("t_boss", "{\"boss\":{\"barDistance\":0}}"), "above 0");
+            Api<int>("RunicNpc_DespawnOwner", Owner);
+
+            // ---- passive (D278, D279, D288) ----
+            Vector3 a = OnMesh(f + new Vector3(-40, 0, 0));
+            _used.Clear();
+            int hitsBefore = _hitsOnStandIns;
+            BasePlayer pas = Spawn(a, "t_passive");
+            BasePlayer talker = StandIn(OnMesh(a + new Vector3(2f, 0, 0)), 61);
+            yield return new WaitForSeconds(1.5f);
+            Dictionary<string, object> dp = Describe(pas);
+            Check("s6.passive.spawned", pas != null && dp != null && (string)dp["role"] == "passive", dp != null ? "role " + dp["role"] : "not spawned");
+            if (pas == null) yield break;
+
+            Sense(pas, talker);
+            yield return new WaitForSeconds(6f);
+            Check("s6.passive.neverFights", _hitsOnStandIns == hitsBefore && !Knows(pas, talker),
+                $"told about a player 2 m off: hits {_hitsOnStandIns - hitsBefore}, still knows it as a target: {Knows(pas, talker)}");
+            Check("s6.passive.stands", Flat(pas.transform.position, a) < 1.5f, $"{Flat(pas.transform.position, a):0.0} m from its spot after 7.5 s");
+
+            float hp = pas.health;
+            pas.Hurt(new HitInfo(talker, pas, Rust.DamageType.Bullet, 50f));
+            Check("s6.passive.unhurtByDefault", pas.health >= hp - 0.01f, $"health {hp:0} → {pas.health:0} after a player's 50 (D279: off by default)");
+
+            Look(talker, pas);
+            PressE(talker);
+            Check("s6.passive.pressE", _used.Count == 1 && _used[0] == "t_passive/RntStandIn61", string.Join(", ", _used.ToArray()));
+            PressE(talker);
+            Check("s6.passive.pressOncePerSecond", _used.Count == 1, $"{_used.Count} answer(s) to two presses at once");
+            talker.eyes.rotation = Quaternion.LookRotation(Vector3.back);
+            yield return new WaitForSeconds(1.2f);
+            PressE(talker);
+            Check("s6.passive.lookingAway", _used.Count == 1, $"E while looking away: {_used.Count} answer(s)");
+
+            BasePlayer win = Spawn(OnMesh(a + new Vector3(0, 0, 10f)), "t_passwin");
+            BasePlayer reader = StandIn(OnMesh(a + new Vector3(2f, 0, 10f)), 62);
+            yield return new WaitForSeconds(1f);
+            if (win != null && reader != null)
+            {
+                Look(reader, win);
+                PressE(reader);
+            }
+
+            Check("s6.passive.window", _used.Contains("t_passwin/RntStandIn62"), string.Join(", ", _used.ToArray()));
+            Dictionary<string, object> dw = Describe(win);
+            Check("s6.passive.wanders", dw != null && (string)dw["movement"] == "wander", dw != null ? "movement " + dw["movement"] : "not spawned");
+
+            BasePlayer ph = Spawn(OnMesh(a + new Vector3(0, 0, -10f)), "t_passhurt");
+            BasePlayer hitter = StandIn(OnMesh(a + new Vector3(2f, 0, -10f)), 63);
+            yield return new WaitForSeconds(1f);
+            if (ph != null && hitter != null)
+            {
+                hitsBefore = _hitsOnStandIns;
+                float before = ph.health;
+                ph.Hurt(new HitInfo(hitter, ph, Rust.DamageType.Bullet, 30f));
+                float after = ph.health;
+                yield return new WaitForSeconds(5f);
+                Check("s6.passive.hurtable", after < before, $"hurtByPlayers on: health {before:0} → {after:0}");
+                Check("s6.passive.neverFightsBack", _hitsOnStandIns == hitsBefore && !Knows(ph, hitter) && TargetOf(Describe(ph)) == "none",
+                    $"hit by a player: shots back {_hitsOnStandIns - hitsBefore}, knows it {Knows(ph, hitter)}");
+            }
+
+            Api<int>("RunicNpc_DespawnOwner", Owner);
+            ClearWorld();
+            StandIn(f + new Vector3(0, 0, 60), 50);
+
+            // ---- the boss (D273–D277, D286, D287) ----
+            _bossEvents.Clear();
+            _bossContributors.Clear();
+            Vector3 b = OnMesh(f + new Vector3(40, 0, 0));
+            BasePlayer shooter = StandIn(OnMesh(b + new Vector3(0, 0, 30f)), 64);
+            BasePlayer boss = Spawn(b, "t_boss");
+            yield return new WaitForSeconds(1.5f);
+            Check("s6.boss.spawned", boss != null && _bossEvents.Contains("spawned:t_boss"), string.Join(", ", _bossEvents.ToArray()));
+            if (boss == null) yield break;
+            Dictionary<string, object> db = Describe(boss);
+            Check("s6.boss.listed", db?["boss"] is Dictionary<string, object> && Convert.ToInt32(((Dictionary<string, object>)db["boss"])["phase"]) == 0, db != null ? JsonConvert.SerializeObject(db["boss"]) : "-");
+
+            ScientistNPC sci = boss as ScientistNPC;
+            float baseSpeed = sci?.Brain?.Navigator != null ? sci.Brain.Navigator.Speed : -1f;
+            float scaleBefore = ((NPCPlayer)boss).damageScale;
+
+            // Down to 70%: phase one (damage ×2, a line).
+            HurtTo(boss, shooter, 0.7f);
+            yield return null;
+            Check("s6.boss.phase1", _bossEvents.Contains("phase1@0.75") && Mathf.Approximately(((NPCPlayer)boss).damageScale, 2f),
+                $"health {boss.health:0}/1000, events {string.Join(", ", _bossEvents.ToArray())}, damageScale {scaleBefore} → {((NPCPlayer)boss).damageScale}");
+
+            // Down to 45%: phase two (two adds of t_roam, one per frame, owned as the boss is).
+            int before2 = List(Owner).Count;
+            HurtTo(boss, shooter, 0.45f);
+            for (int i = 0; i < 10; i++) yield return null;
+            var adds = List(Owner).Where(d => (string)d["profile"] == "t_roam").ToList();
+            Check("s6.boss.phase2.adds", _bossEvents.Contains("phase2@0.5") && adds.Count == 2 && adds.All(d => Flat(V(d["position"]), boss.transform.position) < 10f),
+                $"{adds.Count} add(s) owned by {Owner}, {string.Join(", ", adds.Select(d => Flat(V(d["position"]), boss.transform.position).ToString("0.0") + " m").ToArray())} from the boss; listed {before2} → {List(Owner).Count}");
+
+            // Down to 20%: phase three (kit swap, speed ×1.5, aim and ranges). It is first given another
+            // weapon to hold, so the swap back to the kit's revolver can be seen.
+            boss.inventory.Strip();
+            Give(boss, "pistol.semiauto", 1);
+            ((HumanNPC)boss).EquipWeapon();
+            string heldBefore = boss.GetActiveItem()?.info.shortname ?? "none";
+            HurtTo(boss, shooter, 0.2f);
+            yield return null;
+            float speedNow = sci?.Brain?.Navigator != null ? sci.Brain.Navigator.Speed : -1f;
+            string heldAfter = boss.GetActiveItem()?.info.shortname ?? "none";
+            Check("s6.boss.phase3", _bossEvents.Contains("phase3@0.25") && heldAfter == "pistol.revolver" && Mathf.Approximately(speedNow, baseSpeed * 1.5f) &&
+                                    Mathf.Approximately(((HumanNPC)boss).aimConeScale, 4f),
+                $"held {heldBefore} → {heldAfter}, speed {baseSpeed:0.0} → {speedNow:0.0}, aimConeScale {((HumanNPC)boss).aimConeScale}, senseRange {sci?.Brain?.SenseRange}");
+            Check("s6.boss.phase3.ranges", sci?.Brain != null && Mathf.Approximately(sci.Brain.SenseRange, 50f) && Mathf.Approximately(sci.Brain.TargetLostRange, 60f),
+                $"senseRange {sci?.Brain?.SenseRange}, targetLostRange {sci?.Brain?.TargetLostRange}");
+            db = Describe(boss);
+            Check("s6.boss.listedPhase", db?["boss"] is Dictionary<string, object> && Convert.ToInt32(((Dictionary<string, object>)db["boss"])["phase"]) == 3, db != null ? JsonConvert.SerializeObject(db["boss"]) : "-");
+
+            // A phase changes the boss's own copy of its profile, never the shared one.
+            BasePlayer second = Spawn(OnMesh(b + new Vector3(8, 0, 0)), "t_boss");
+            yield return new WaitForSeconds(0.5f);
+            Check("s6.boss.ownProfile", second != null && Mathf.Approximately(((NPCPlayer)second).damageScale, 1f) && Mathf.Approximately(((HumanNPC)second).aimConeScale, 2f),
+                second != null ? $"a second t_boss: damageScale {((NPCPlayer)second).damageScale}, aimConeScale {((HumanNPC)second).aimConeScale}" : "not spawned");
+            if (second != null) Api<int>("RunicNpc_Despawn", Id(second));
+
+            // The kill: the death hook with every player who hurt it; the adds fight on (D287).
+            ulong bossId = Id(boss);
+            boss.Hurt(new HitInfo(shooter, boss, Rust.DamageType.Bullet, 5000f));
+            yield return new WaitForSeconds(1f);
+            Check("s6.boss.died", _bossEvents.Contains("died:t_boss") && _bossContributors.ContainsKey(StandInId + 64) && _bossContributors[StandInId + 64] > 990f,
+                $"events {string.Join(", ", _bossEvents.ToArray())}, contributors {JsonConvert.SerializeObject(_bossContributors)}");
+            int addsLeft = List(Owner).Count(d => (string)d["profile"] == "t_roam");
+            Check("s6.boss.addsFightOn", addsLeft == 2, $"{addsLeft} add(s) alive after the boss died (D287)");
+            // An event's teardown despawns what its step placed, by net id: the dead boss's id takes its adds with it.
+            int removed = Api<int>("RunicNpc_Despawn", bossId);
+            int addsAfter = List(Owner).Count(d => (string)d["profile"] == "t_roam");
+            Check("s6.boss.despawnTakesAdds", removed == 2 && addsAfter == 0, $"RunicNpc_Despawn(the dead boss's id) removed {removed}; adds left {addsAfter}");
+            Check("s6.boss.unlisted", List(Owner).All(d => (string)d["profile"] != "t_boss"), "");
+
+            // ---- the examples (D280, D284, D289) ----
+            Plugin kits = plugins.Find("Kits");
+            string[] exampleKits = { "rnpc_raider", "rnpc_campguard", "rnpc_sniper", "rnpc_juggernaut" };
+            string[] missing = exampleKits.Where(k => !(kits?.Call("IsKit", k) is bool && (bool)kits.Call("IsKit", k))).ToArray();
+            Check("s6.examples.kits", missing.Length == 0, missing.Length == 0 ? "all four in Kits" : "missing: " + string.Join(", ", missing));
+            JObject kitFile = Interface.Oxide.DataFileSystem.ReadObject<JObject>("Kits/kits_data");
+            Check("s6.examples.permission", exampleKits.All(k => (string)kitFile?["_kits"]?[k]?["RequiredPermission"] == "kits.runicnpc"),
+                "each needs kits.runicnpc, which nobody is granted");
+            JObject state = Interface.Oxide.DataFileSystem.ReadObject<JObject>("RunicNPC/state");
+            Check("s6.examples.once", state?["examplesWritten"]?.Type == JTokenType.Boolean && (bool)state["examplesWritten"], "state.json: " + state?.ToString(Formatting.None));
+            JObject items = kitFile?["_kits"]?["rnpc_juggernaut"] as JObject;
+            int itemCount = items == null ? 0 : ((JArray)items["MainItems"]).Count + ((JArray)items["WearItems"]).Count + ((JArray)items["BeltItems"]).Count;
+            Check("s6.examples.items", itemCount == 6, $"rnpc_juggernaut carries {itemCount} of its 6 items (a short name this Rust lacks would be left out)");
+        }
+
         // ---- stage 6's spike (D282): press E, the health bar, Kits' data file, a kit swap mid-fight, adds ----
 
         private const string SwapKit = "rnt6smg";