fix: re-run dynamic prompts fed through linked text inputs

IS_CHANGED only receives constant inputs, so a linked text always
arrived as None and the node kept serving its cached first expansion.
Declare hidden PROMPT/UNIQUE_ID inputs and walk the prompt graph to
the upstream node: rerun only when its constants contain dynamic
syntax or cannot be statically resolved, keep caching for static
linked text.

Fixes #1120

tests/nodes/test_prompt_text_wildcards.py

@@ -84,3 +84,100 @@ def test_prompt_lm_is_changed_forces_rerun_without_seed_when_text_is_dynamic():
 def test_prompt_lm_is_changed_keeps_cache_for_seeded_or_static_text():
     assert PromptLM.IS_CHANGED("__flower__", clip="clip", seed=11) is False
     assert PromptLM.IS_CHANGED("plain text", clip="clip", seed=None) is False
+
+
+def _linked_prompt(upstream_inputs):
+    return {
+        "1": {"class_type": "TextMultiline", "inputs": upstream_inputs},
+        "2": {
+            "class_type": "PromptLM",
+            "inputs": {"text": ["1", 0], "clip": ["3", 0]},
+        },
+    }
+
+
+def test_prompt_lm_is_changed_forces_rerun_for_linked_dynamic_text():
+    prompt = _linked_prompt({"text": "{red|blue|green}"})
+
+    result = PromptLM.IS_CHANGED(None, clip="clip", seed=None, prompt=prompt, unique_id="2")
+
+    assert result != result
+
+
+def test_prompt_lm_is_changed_keeps_cache_for_linked_static_text():
+    prompt = _linked_prompt({"text": "a plain static prompt"})
+
+    assert PromptLM.IS_CHANGED(None, clip="clip", seed=None, prompt=prompt, unique_id="2") is False
+    assert PromptLM.IS_CHANGED(None, clip="clip", seed=5, prompt=prompt, unique_id="2") is False
+
+
+def test_prompt_lm_is_changed_forces_rerun_when_linked_text_unresolvable():
+    chained = _linked_prompt({"text": ["9", 0]})
+
+    result = PromptLM.IS_CHANGED(None, clip="clip", seed=None, prompt=chained, unique_id="2")
+
+    assert result != result
+    assert PromptLM.IS_CHANGED(None, clip="clip", seed=None, prompt=None, unique_id="2") != 0
+    missing_upstream = _linked_prompt({"text": "static"})
+    missing_upstream["2"]["inputs"]["text"] = ["99", 0]
+    assert (
+        PromptLM.IS_CHANGED(None, clip="clip", seed=None, prompt=missing_upstream, unique_id="2")
+        != 0
+    )
+
+
+def test_text_lm_is_changed_forces_rerun_for_linked_dynamic_text():
+    prompt = _linked_prompt({"text": "__flower__"})
+
+    result = TextLM.IS_CHANGED(None, seed=None, prompt=prompt, unique_id="2")
+
+    assert result != result
+
+
+def test_text_lm_is_changed_keeps_cache_for_linked_static_text():
+    prompt = _linked_prompt({"text": "a plain static prompt"})
+
+    assert TextLM.IS_CHANGED(None, seed=None, prompt=prompt, unique_id="2") is False
+
+
+def test_text_lm_process_accepts_hidden_inputs(monkeypatch):
+    node = TextLM()
+
+    class StubService:
+        def expand_text(self, text, seed=None):
+            return text
+
+    monkeypatch.setattr("py.nodes.text.get_wildcard_service", lambda: StubService())
+
+    assert node.process("hello", seed=None, prompt={}, unique_id="2") == ("hello",)
+
+
+def test_prompt_lm_encode_accepts_hidden_inputs(monkeypatch):
+    node = PromptLM()
+
+    class StubService:
+        def expand_text(self, text, seed=None):
+            return text
+
+    class StubEncoder:
+        def encode(self, clip, prompt):
+            return ("conditioning",)
+
+    monkeypatch.setattr("py.nodes.prompt.get_wildcard_service", lambda: StubService())
+    monkeypatch.setattr("nodes.CLIPTextEncode", lambda: StubEncoder(), raising=False)
+
+    result = node.encode("hello", "clip", seed=None, prompt={}, unique_id="2")
+
+    assert result == ("conditioning", "hello")
+
+
+def test_prompt_lm_input_types_declare_hidden_prompt_inputs():
+    hidden = PromptLM.INPUT_TYPES()["hidden"]
+
+    assert hidden == {"prompt": "PROMPT", "unique_id": "UNIQUE_ID"}
+
+
+def test_text_lm_input_types_declare_hidden_prompt_inputs():
+    hidden = TextLM.INPUT_TYPES()["hidden"]
+
+    assert hidden == {"prompt": "PROMPT", "unique_id": "UNIQUE_ID"}