First commit, working quite ok!

dependency.py

@@ -0,0 +1,46 @@
+"""
+AutoDev - Dependency Tracker
+Tracks and records all external dependencies.
+"""
+
+import os
+from . import config
+
+
+class DependencyTracker:
+    def __init__(self, workdir: str):
+        self.path = os.path.join(workdir, config.DEPENDENCY_FILE)
+        self.deps: set[str] = set()
+        self._load()
+
+    def _load(self):
+        if os.path.exists(self.path):
+            with open(self.path, "r") as f:
+                for line in f:
+                    line = line.strip()
+                    if line and not line.startswith("#"):
+                        self.deps.add(line)
+
+    def _save(self):
+        with open(self.path, "w") as f:
+            f.write("# AutoDev - Project Dependencies\n")
+            f.write("# Auto-generated, do not edit manually\n\n")
+            for d in sorted(self.deps):
+                f.write(d + "\n")
+
+    def add(self, dep: str):
+        if dep not in self.deps:
+            self.deps.add(dep)
+            self._save()
+
+    def add_many(self, deps: list[str]):
+        changed = False
+        for d in deps:
+            if d not in self.deps:
+                self.deps.add(d)
+                changed = True
+        if changed:
+            self._save()
+
+    def get_all(self) -> list[str]:
+        return sorted(self.deps)