feat: v2.0.0 -- confirmed working, scaffolding removed

Confirmed in game. The radiator's thermal-ammo and hold signals both
arrive, VentAllowed goes false, and the radiator idles with its manual
switch still on -- heat banked for the launchers instead of vented.

The self-test probes did their job: ThresholdToggle was fine, and a
mod-defined category carries a value perfectly well. The EMP probe was
simply a bad probe -- it read thermal_load_dissipation, which an idled
radiator broadcasts as zero, so it was correctly reporting a real zero.
Routing in v1.3.0 was the actual cure.

Remove the probes and the diagnostic indicators. The repointed power
indicator is the one cue a player needs: it now shows on a radiator the
mod has idled.

Add test_override_values_name_real_components, which catches an Overrides
value naming a component that does not exist -- a fourth way to produce a
mod that loads clean and does nothing, and one this very commit
introduced while stripping the scaffolding.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011oLWY1G6S8U35bi2FxVWni

tests/test_mod.py

@@ -532,6 +532,54 @@ def test_network_components_are_routed():
             )
 
 
+# ---------------------------------------------------------------------------
+# 6d. An Overrides value that names a component must name one that exists.
+#
+#     The whole point of the Overrides actions is to repoint vanilla components
+#     at components this mod adds. If such a value names something that is not
+#     there -- deleted, renamed, or never written -- the mod still loads and the
+#     gate silently reverts to doing nothing.
+# ---------------------------------------------------------------------------
+
+def test_override_values_name_real_components():
+    mod = rules_parser.parse_file(os.path.join(MOD_ROOT, "mod.rules"))
+
+    # What each part offers: its vanilla components plus what the mod adds.
+    available = {}
+    for mod_file, part_path in addbase_targets():
+        added = rules_parser.parse_file(mod_file)
+        vanilla_components = resolve(f"<{part_path}>/Part/Components")
+        names = set(added.order)
+        if vanilla_components is not None:
+            names |= set(vanilla_components.order)
+        available.setdefault(part_path, set()).update(names)
+
+    for action in iter_actions(mod):
+        kind = action.get("Action")
+        target = action.get("OverrideIn")
+        if not kind or kind.value != "Overrides" or target is None:
+            continue
+        part_path, _inner = split_target(target.value)
+        known = available.get(part_path)
+        if not known:
+            continue
+        overrides = action.get("Overrides")
+        if overrides is None:
+            continue
+        for field in overrides.order:
+            value = overrides.children[field]
+            if value.kind != "scalar":
+                continue
+            ref = value.value.strip()
+            if not re.match(r"^[A-Za-z_][A-Za-z0-9_]*$", ref):
+                continue
+            check(
+                ref in known,
+                f"Overrides sets {field} = '{ref}' on {os.path.basename(part_path)}, "
+                f"but no such component exists on that part",
+            )
+
+
 # ---------------------------------------------------------------------------
 # 7. Added indicators must bind to a real toggle and a real atlas sprite.
 # ---------------------------------------------------------------------------