fix: isolate invalid Unicode hook IDs

Assisted-by: GitHub Copilot (model: GPT-5.6 Sol, autonomous)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 667230a1-e9fa-4500-a57f-c1c482be2507

Author: nicolehaugen

src/specify_cli/artifacts/_identifiers.py

@@ -109,7 +109,12 @@ def _encode_hook_component(value: Any, field_label: str) -> str:
         raise IdentifierComponentError(
             f"Invalid {field_label}: value must not be empty"
         )
-    return quote(value, safe="")
+    try:
+        return quote(value, safe="")
+    except UnicodeEncodeError as exc:
+        raise IdentifierComponentError(
+            f"Invalid {field_label}: value cannot be UTF-8 encoded"
+        ) from exc
 
 
 def _decode_hook_component(value: str, field_label: str) -> str:

tests/test_artifact_command.py

@@ -1720,6 +1720,42 @@ def test_flat_and_stack_listings_include_the_same_hook(
             key: value for key, value in enriched.items() if key != "stack"
         }
 
+    @pytest.mark.parametrize(
+        "hooks",
+        [
+            {
+                "before_specify": [{"command": "speckit.healthy.cmd"}],
+                "\ud800": [{"command": "speckit.invalid.cmd"}],
+            },
+            {
+                "before_specify": [
+                    {"command": "speckit.healthy.cmd"},
+                    {"command": "\ud800"},
+                ]
+            },
+        ],
+        ids=["invalid-event", "invalid-command"],
+    )
+    def test_invalid_unicode_hook_is_omitted_without_hiding_healthy_hooks(
+        self, spec_kit_project: Path, hooks: dict
+    ):
+        _install_extension_with_hooks(
+            spec_kit_project,
+            "unicode-hooks",
+            hooks=hooks,
+        )
+
+        catalog = ArtifactCatalog(spec_kit_project)
+        flat_hooks = [row for row in catalog.list_artifacts() if row.kind == "hook"]
+        enriched_hooks = [
+            row for row in catalog.list_artifacts_with_stack() if row["kind"] == "hook"
+        ]
+
+        assert [row.targetCommand for row in flat_hooks] == ["speckit.healthy.cmd"]
+        assert [row["targetCommand"] for row in enriched_hooks] == [
+            "speckit.healthy.cmd"
+        ]
+
     def test_declared_hook_has_artifact_and_stack_shape(
         self, spec_kit_project: Path
     ):