install_extras

core/src/castle_core/config.py

@@ -134,7 +134,11 @@ def load_config(root: Path | None = None) -> CastleConfig:
     # Support both "programs:" and legacy "components:" key
     programs_data = data.get("programs") or data.get("components") or {}
     for name, comp_data in programs_data.items():
-        programs[name] = _parse_program(name, comp_data)
+        prog = _parse_program(name, comp_data)
+        # Resolve relative source paths to absolute
+        if prog.source and not Path(prog.source).is_absolute():
+            prog.source = str(root / prog.source)
+        programs[name] = prog
 
     services: dict[str, ServiceSpec] = {}
     for name, svc_data in data.get("services", {}).items():
@@ -230,7 +234,14 @@ def save_config(config: CastleConfig) -> None:
     if config.programs:
         data["programs"] = {}
         for name, spec in config.programs.items():
-            data["programs"][name] = _spec_to_yaml_dict(spec)
+            d = _spec_to_yaml_dict(spec)
+            # Store relative source paths in YAML
+            if d.get("source") and Path(d["source"]).is_absolute():
+                try:
+                    d["source"] = str(Path(d["source"]).relative_to(config.root))
+                except ValueError:
+                    pass  # not under root — keep absolute
+            data["programs"][name] = d
 
     if config.services:
         data["services"] = {}

core/src/castle_core/manifest.py

@@ -185,6 +185,7 @@ class ProgramSpec(BaseModel):
     stack: str | None = None
 
     system_dependencies: list[str] = Field(default_factory=list)
+    install_extras: list[str] = Field(default_factory=list)
     version: str | None = None
     build: BuildSpec | None = None
 

core/src/castle_core/stacks.py

@@ -139,8 +139,11 @@ class PythonHandler(StackHandler):
 
     async def install(self, name: str, comp: ProgramSpec, root: Path) -> ActionResult:
         src = _source_dir(comp, root)
+        pkg_spec = str(src)
+        if comp.install_extras:
+            pkg_spec += "[" + ",".join(comp.install_extras) + "]"
         rc, output = await _run(
-            ["uv", "tool", "install", "--editable", str(src), "--force"], src
+            ["uv", "tool", "install", "--editable", pkg_spec, "--force"], src
         )
         return ActionResult(
             component=name, action="install", status="ok" if rc == 0 else "error", output=output