feat: add official Codex skill and harden task execution

Install and update artemis-use with task diagnostics and plugin guidance. Preserve cross-device file receipts, review canonical reports, guard stage transitions and reduce small history summaries. Improve exploration lifecycle, request recovery and browser live connections.

setup.py

@@ -53,6 +53,20 @@ def _copy_release_resources(source_root: Path, resource_root: Path) -> None:
             "Run `npm ci --prefix apps/showcase_ui` and "
             "`npm run build --prefix apps/showcase_ui` first."
         )
+    skill_candidates = (
+        source_root / "skills" / "artemis-use",
+        source_root / "artemis" / "resources" / "skills" / "artemis-use",
+    )
+    skill_source = next((path for path in skill_candidates if (path / "SKILL.md").is_file()), None)
+    if skill_source is None:
+        raise RuntimeError("Cannot build Artemis: official artemis-use Skill is missing.")
+    skill_target = resource_root / "skills" / "artemis-use"
+    if skill_target.exists():
+        shutil.rmtree(skill_target)
+    shutil.copytree(
+        skill_source, skill_target, ignore=shutil.ignore_patterns("__pycache__", "*.pyc")
+    )
+
     config_target = resource_root / "config"
     config_target.mkdir(parents=True, exist_ok=True)
     shutil.copy2(config_source, config_target / "artemis.jsonc")
@@ -149,7 +163,7 @@ setup(
     package_data={
         "mcp_server": ["catalog.json"],
         "artemis": ["**/*.json", "**/*.md"],
-        "artemis.resources": ["config/*.jsonc", "showcase_ui/*", "showcase_ui/**/*"],
+        "artemis.resources": ["config/*.jsonc", "showcase_ui/*", "showcase_ui/**/*", "skills/**/*"],
         "apps.admin_console": ["index.html"],
     },
     include_package_data=False,