feat: add versioned skill configuration

backend/apps/skills/tests/test_services.py

@@ -0,0 +1,58 @@
+import pytest
+
+from apps.skills.models import SkillDefinition, SkillVersion
+from apps.skills.services import (
+    SkillValidationError,
+    render_prompt,
+    validate_skill_version,
+)
+
+VALID_INPUT_SCHEMA = {
+    "type": "object",
+    "properties": {"problem": {"type": "string"}},
+    "required": ["problem"],
+}
+VALID_OUTPUT_SCHEMA = {
+    "type": "object",
+    "properties": {"summary": {"type": "string"}},
+    "required": ["summary"],
+}
+
+
+def make_version(**overrides):
+    definition = SkillDefinition.objects.create(code="summarize", name="问题摘要")
+    values = {
+        "definition": definition,
+        "version": 1,
+        "prompt_template": "请总结：{{ input.problem }}",
+        "input_schema": VALID_INPUT_SCHEMA,
+        "output_schema": VALID_OUTPUT_SCHEMA,
+        "example_input": {"problem": "无法登录"},
+    }
+    values.update(overrides)
+    return SkillVersion.objects.create(**values)
+
+
+def test_validates_and_renders_restricted_template(db):
+    version = make_version()
+
+    validate_skill_version(version)
+
+    assert render_prompt(version.prompt_template, {"problem": "无法登录"}) == "请总结：无法登录"
+
+
+def test_rejects_expression_or_missing_variable(db):
+    version = make_version(prompt_template="{{ steps.previous.output }}")
+
+    with pytest.raises(SkillValidationError, match="不允许的模板变量"):
+        validate_skill_version(version)
+
+    with pytest.raises(SkillValidationError, match="模板变量不存在"):
+        render_prompt("{{ input.environment }}", {"problem": "无法登录"})
+
+
+def test_rejects_example_that_does_not_match_schema(db):
+    version = make_version(example_input={"problem": 123})
+
+    with pytest.raises(SkillValidationError, match="示例输入不符合"):
+        validate_skill_version(version)