chore(github-copilot-sdk): release v0.12.2

- support multi-line SKILL.md frontmatter parsing in manage_skills

- write multi-line skill descriptions as YAML block scalars

- sync README, docs, and release notes for v0.12.2

tests/plugins/pipes/test_github_copilot_sdk_skill_meta.py

@@ -0,0 +1,62 @@
+import importlib.util
+import sys
+from pathlib import Path
+
+
+MODULE_PATH = (
+    Path(__file__).resolve().parents[3]
+    / "plugins"
+    / "pipes"
+    / "github-copilot-sdk"
+    / "github_copilot_sdk.py"
+)
+SPEC = importlib.util.spec_from_file_location("github_copilot_sdk", MODULE_PATH)
+github_copilot_sdk = importlib.util.module_from_spec(SPEC)
+assert SPEC.loader is not None
+sys.modules[SPEC.name] = github_copilot_sdk
+SPEC.loader.exec_module(github_copilot_sdk)
+
+PIPE = github_copilot_sdk.Pipe()
+
+
+def test_pipe_parse_skill_md_meta_supports_folded_multiline_description():
+    content = (
+        "---\r\n"
+        "name: persona-selector\r\n"
+        "description: >\r\n"
+        "  Two-step persona picker.\r\n"
+        "  Step 2 provides persona options.\r\n"
+        "---\r\n\r\n"
+        "# Persona Selector\r\n\r\n"
+        "Body content.\r\n"
+    )
+
+    name, description, body = PIPE._parse_skill_md_meta(content, "fallback-skill")
+
+    assert name == "persona-selector"
+    assert description == "Two-step persona picker. Step 2 provides persona options."
+    assert body == "# Persona Selector\n\nBody content."
+
+
+def test_pipe_build_skill_md_content_round_trips_multiline_description():
+    content = PIPE._build_skill_md_content(
+        "Data Storyteller",
+        "First line.\nSecond line.\n\nThird paragraph.",
+        "Explain how to turn analysis into a narrative.",
+    )
+
+    assert (
+        "description: |\n"
+        "  First line.\n"
+        "  Second line.\n"
+        "\n"
+        "  Third paragraph.\n"
+    ) in content
+
+    name, description, body = PIPE._parse_skill_md_meta(content, "fallback-skill")
+
+    assert name == "Data Storyteller"
+    assert description == "First line.\nSecond line.\n\nThird paragraph."
+    assert body == (
+        "# Data Storyteller\n\nExplain how to turn analysis into a narrative."
+    )