fix: copilot adapter output path respects output_root with .github/ prefix

tools/adapters/copilot.py

@@ -6,7 +6,6 @@ import re
 from pathlib import Path
 
 from tools.adapters.base import (
-    WORKTREE,
     AgentSource,
     EmitResult,
     HarnessAdapter,
@@ -64,8 +63,8 @@ def _build_tools_list(agent_tools: list[str]) -> list[str]:
 class CopilotAdapter(HarnessAdapter):
     """Emit Copilot agent profiles (.agent.md) and skills (SKILL.md) to a local output tree.
 
-    Agents go to ``agents/<plugin>__<agent>.agent.md``, skills to
-    ``skills/<plugin>__<skill>/SKILL.md``.  Tool names are rewritten from
+    Agents go to ``.github/agents/<plugin>__<agent>.agent.md``, skills to
+    ``.github/skills/<plugin>__<skill>/SKILL.md``.  Tool names are rewritten from
     Claude Code CamelCase to Copilot lowercase.  Model aliases are mapped to
     the GPT-5 family (same as Codex CLI).
     """
@@ -74,7 +73,7 @@ class CopilotAdapter(HarnessAdapter):
 
     def __init__(self, output_root: Path | None = None, repo_root: Path | None = None) -> None:
         """Set output root (defaults to WORKTREE / .github) and optional repo root."""
-        super().__init__(output_root=output_root or WORKTREE / ".github")
+        super().__init__(output_root=output_root)
         if repo_root is not None:
             self.repo_root = repo_root
 
@@ -98,7 +97,7 @@ class CopilotAdapter(HarnessAdapter):
         names, and resolves model aliases before writing.
         """
         agent_id = f"{plugin.name}__{agent.name}"
-        rel = Path("agents") / f"{agent_id}.agent.md"
+        rel = Path(".github") / "agents" / f"{agent_id}.agent.md"
 
         model, warning = resolve_model("copilot", agent.model)
         if warning:
@@ -126,7 +125,7 @@ class CopilotAdapter(HarnessAdapter):
         phrases) and body verbatim, wrapped in YAML frontmatter.
         """
         skill_id = f"{plugin.name}__{skill.name}"
-        skill_dir = Path("skills") / skill_id
+        skill_dir = Path(".github") / "skills" / skill_id
 
         content = _copilot_frontmatter(skill.frontmatter) + "\n\n" + skill.body.rstrip() + "\n"
         result.written.append(self.write(skill_dir / "SKILL.md", content))