feat(vibe): migrate to SkillsIntegration from the old prompts-based MarkdownIntegration (#2336)

* feat(vibe): migrate to SkillsIntegration and inject user-invocable frontmatter
Switches VibeIntegration from the old prompts-based MarkdownIntegration to SkillsIntegration, adopting the .vibe/skills/speckit-<name>/SKILL.md layout required by Mistral Vibe v2.0.0+. Post-processes each generated SKILL.md to inject `user-invocable: true` so skills are directly callable by users, not  just by other agents.

* test(vibe): assert user- invocable: true is present in all generated SKILL.md files

* Update tests/integrations/test_integration_vibe.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/specify_cli/integrations/vibe/__init__.py

@@ -1,21 +1,133 @@
-"""Mistral Vibe CLI integration."""
+"""
+Mistral Vibe CLI integration — skills-based agent.
 
-from ..base import MarkdownIntegration
+Vibe uses ``.vibe/skills/speckit-<name>/SKILL.md`` layout (enforced since v2.0.0).
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any
+
+from ..base import IntegrationOption, SkillsIntegration
+from ..manifest import IntegrationManifest
 
 
-class VibeIntegration(MarkdownIntegration):
+class VibeIntegration(SkillsIntegration):
     key = "vibe"
     config = {
         "name": "Mistral Vibe",
         "folder": ".vibe/",
-        "commands_subdir": "prompts",
+        "commands_subdir": "skills",
         "install_url": "https://github.com/mistralai/mistral-vibe",
         "requires_cli": True,
     }
     registrar_config = {
-        "dir": ".vibe/prompts",
+        "dir": ".vibe/skills",
         "format": "markdown",
         "args": "$ARGUMENTS",
-        "extension": ".md",
+        "extension": "/SKILL.md",
     }
-    context_file = ".vibe/agents/specify-agents.md"
+    context_file = "AGENTS.md"
+
+    @classmethod
+    def options(cls) -> list[IntegrationOption]:
+        return [
+            IntegrationOption(
+                "--skills",
+                is_flag=True,
+                default=True,
+                help="Install as agent skills",
+            ),
+        ]
+
+    @staticmethod
+    def _inject_frontmatter_flag(content: str, key: str, value: str = "true") -> str:
+        """
+        Insert ``key: value`` before the closing ``---`` if not already present.
+        Value: true by default
+        """
+        lines = content.splitlines(keepends=True)
+
+        # Pre-scan: bail out if already present in frontmatter
+        dash_count = 0
+        for line in lines:
+            stripped = line.rstrip("\n\r")
+            if stripped == "---":
+                dash_count += 1
+                if dash_count == 2:
+                    break
+                continue
+            if dash_count == 1 and stripped.startswith(f"{key}:"):
+                return content
+
+        # Inject before the closing --- of frontmatter
+        out: list[str] = []
+        dash_count = 0
+        injected = False
+        for line in lines:
+            stripped = line.rstrip("\n\r")
+            if stripped == "---":
+                dash_count += 1
+                if dash_count == 2 and not injected:
+                    if line.endswith("\r\n"):
+                        eol = "\r\n"
+                    elif line.endswith("\n"):
+                        eol = "\n"
+                    else:
+                        eol = ""
+                    out.append(f"{key}: {value}{eol}")
+                    injected = True
+            out.append(line)
+        return "".join(out)
+
+
+    def post_process_skill_content(self, content: str) -> str:
+        """
+        Inject Vibe-specific frontmatter flags:
+        - user-invocable: allows the skill to be invoked by the user (not just other agents)
+        """
+        updated = self._inject_frontmatter_flag(content, "user-invocable")
+        return updated
+
+    def setup(
+        self,
+        project_root: Path,
+        manifest: IntegrationManifest,
+        parsed_options: dict[str, Any] | None = None,
+        **opts: Any,
+    ) -> list[Path]:
+        """Install Vibe skills then inject Vibe-specific flags"""
+        import click
+
+        click.secho(
+            "Warning: The .vibe/skills layout requires Mistral Vibe v2.0.0 or newer. "
+            "Please ensure your installation is up to date.",
+            fg="yellow",
+            err=True,
+        )
+
+        created = super().setup(project_root, manifest, parsed_options=parsed_options, **opts)
+
+        # Post-process generated skill files
+        skills_dir = self.skills_dest(project_root).resolve()
+
+        for path in created:
+            # Only touch SKILL.md files under the skills directory
+            try:
+                path.resolve().relative_to(skills_dir)
+            except ValueError:
+                continue
+            if path.name != "SKILL.md":
+                continue
+
+            content_bytes = path.read_bytes()
+            content = content_bytes.decode("utf-8")
+
+            updated = self.post_process_skill_content(content)
+
+            if updated != content:
+                path.write_bytes(updated.encode("utf-8"))
+                self.record_file_in_manifest(path, project_root, manifest)
+
+        return created

tests/integrations/test_integration_vibe.py

@@ -1,11 +1,38 @@
 """Tests for VibeIntegration."""
 
-from .test_integration_base_markdown import MarkdownIntegrationTests
+import yaml
+
+from specify_cli.integrations import get_integration
+from specify_cli.integrations.manifest import IntegrationManifest
+
+from .test_integration_base_skills import SkillsIntegrationTests
 
 
-class TestVibeIntegration(MarkdownIntegrationTests):
+class TestVibeIntegration(SkillsIntegrationTests):
     KEY = "vibe"
     FOLDER = ".vibe/"
-    COMMANDS_SUBDIR = "prompts"
-    REGISTRAR_DIR = ".vibe/prompts"
-    CONTEXT_FILE = ".vibe/agents/specify-agents.md"
+    COMMANDS_SUBDIR = "skills"
+    REGISTRAR_DIR = ".vibe/skills"
+    CONTEXT_FILE = "AGENTS.md"
+
+
+class TestVibeUserInvocable:
+    def test_all_skills_have_user_invocable(self, tmp_path):
+        i = get_integration("vibe")
+        m = IntegrationManifest("vibe", tmp_path)
+        created = i.setup(tmp_path, m, script_type="sh")
+        skill_files = [f for f in created if f.name == "SKILL.md"]
+        assert skill_files
+        for f in skill_files:
+            content = f.read_text(encoding="utf-8")
+            assert content.startswith("---"), (
+                f"{f.parent.name}/SKILL.md is missing the opening frontmatter delimiter '---'"
+            )
+            parts = content.split("---", 2)
+            assert len(parts) >= 3, (
+                f"{f.parent.name}/SKILL.md has malformed frontmatter; expected a '--- ... ---' block"
+            )
+            parsed = yaml.safe_load(parts[1])
+            assert parsed.get("user-invocable") is True, (
+                f"{f.parent.name}/SKILL.md is missing user-invocable: true in frontmatter"
+            )