core: root discovery + status

src/afs/__init__.py

@@ -3,6 +3,14 @@
 __version__ = "0.0.0"
 
 from .config import load_config, load_config_model
+from .core import find_root, resolve_context_root
 from .plugins import discover_plugins, load_plugins
 
-__all__ = ["load_config", "load_config_model", "discover_plugins", "load_plugins"]
+__all__ = [
+    "load_config",
+    "load_config_model",
+    "discover_plugins",
+    "load_plugins",
+    "find_root",
+    "resolve_context_root",
+]

src/afs/cli.py

@@ -8,6 +8,7 @@ from pathlib import Path
 from typing import Iterable
 
 from .config import load_config_model
+from .core import find_root, resolve_context_root
 from .plugins import discover_plugins, load_plugins
 from .schema import AFSConfig, GeneralConfig, WorkspaceDirectory
 
@@ -128,6 +129,27 @@ def _plugins_command(args: argparse.Namespace) -> int:
     return 0
 
 
+def _status_command(args: argparse.Namespace) -> int:
+    start_dir = Path(args.start_dir).expanduser().resolve() if args.start_dir else None
+    root = find_root(start_dir)
+    config = load_config_model()
+    context_root = resolve_context_root(config, root)
+
+    print(f"context_root: {context_root}")
+    print(f"linked_root: {root if root else '(none)'}")
+
+    missing = []
+    for name in AFS_DIRS:
+        if not (context_root / name).exists():
+            missing.append(name)
+    if missing:
+        print("missing_dirs: " + ", ".join(missing))
+    else:
+        print("missing_dirs: (none)")
+
+    return 0
+
+
 def build_parser() -> argparse.ArgumentParser:
     parser = argparse.ArgumentParser(prog="afs")
     subparsers = parser.add_subparsers(dest="command")
@@ -147,6 +169,10 @@ def build_parser() -> argparse.ArgumentParser:
     plugins_parser.add_argument("--load", action="store_true", help="Attempt to import plugins.")
     plugins_parser.set_defaults(func=_plugins_command)
 
+    status_parser = subparsers.add_parser("status", help="Show context root status.")
+    status_parser.add_argument("--start-dir", help="Directory to search from.")
+    status_parser.set_defaults(func=_status_command)
+
     return parser
 
 

src/afs/core.py

@@ -0,0 +1,34 @@
+"""Core AFS helpers."""
+
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+from .schema import AFSConfig
+
+
+def find_root(start_dir: Path | None = None) -> Path | None:
+    """Find a .context directory by walking upward."""
+    if start_dir is None:
+        start_dir = Path.cwd()
+    current = start_dir.resolve()
+    for parent in [current, *current.parents]:
+        candidate = parent / ".context"
+        if candidate.exists() and candidate.is_dir():
+            return candidate
+        if (parent / "afs.toml").exists():
+            return parent / ".context"
+    return None
+
+
+def resolve_context_root(config: AFSConfig | None, linked_root: Path | None) -> Path:
+    """Resolve the active context root for this machine."""
+    env_root = os.environ.get("AFS_CONTEXT_ROOT")
+    if env_root:
+        return Path(env_root).expanduser().resolve()
+    if linked_root:
+        return linked_root.resolve()
+    if config:
+        return config.general.context_root
+    return (Path.home() / ".context").resolve()