diff --git a/cutekit/__init__.py b/cutekit/__init__.py
index efb0d7f..bb7ec34 100644
--- a/cutekit/__init__.py
+++ b/cutekit/__init__.py
@@ -2,11 +2,12 @@ import sys
 import os
 import logging
 
+from pathlib import Path
+
 from . import (
-    builder,  # noqa: F401 this is imported for side effects
-    cli,
+    builder,
+    cli,  # noqa: F401 this is imported for side effects
     const,
-    graph,  # noqa: F401 this is imported for side effects
     model,
     plugins,
     pods,  # noqa: F401 this is imported for side effects
@@ -28,48 +29,75 @@ def ensure(version: tuple[int, int, int]):
     )
 
 
-def setupLogger(verbose: bool):
-    if verbose:
-        logging.basicConfig(
-            level=logging.DEBUG,
-            format=f"{vt100.CYAN}%(asctime)s{vt100.RESET} {vt100.YELLOW}%(levelname)s{vt100.RESET} %(name)s: %(message)s",
-            datefmt="%Y-%m-%d %H:%M:%S",
-        )
-    else:
-        projectRoot = model.Project.topmost()
-        logFile = const.GLOBAL_LOG_FILE
-        if projectRoot is not None:
-            logFile = os.path.join(projectRoot.dirname(), const.PROJECT_LOG_FILE)
+class logger:
+    class LoggerArgs:
+        verbose: bool = cli.arg(None, "verbose", "Enable verbose logging")
 
-        shell.mkdir(os.path.dirname(logFile))
+    @staticmethod
+    def setup(args: LoggerArgs):
+        if args.verbose:
+            logging.basicConfig(
+                level=logging.DEBUG,
+                format=f"{vt100.CYAN}%(asctime)s{vt100.RESET} {vt100.YELLOW}%(levelname)s{vt100.RESET} %(name)s: %(message)s",
+                datefmt="%Y-%m-%d %H:%M:%S",
+            )
+        else:
+            projectRoot = model.Project.topmost()
+            logFile = const.GLOBAL_LOG_FILE
+            if projectRoot is not None:
+                logFile = os.path.join(projectRoot.dirname(), const.PROJECT_LOG_FILE)
 
-        logging.basicConfig(
-            level=logging.INFO,
-            filename=logFile,
-            filemode="w",
-            format="%(asctime)s %(levelname)s %(name)s: %(message)s",
-            datefmt="%Y-%m-%d %H:%M:%S",
-        )
+            shell.mkdir(os.path.dirname(logFile))
+
+            logging.basicConfig(
+                level=logging.INFO,
+                filename=logFile,
+                filemode="w",
+                format="%(asctime)s %(levelname)s %(name)s: %(message)s",
+                datefmt="%Y-%m-%d %H:%M:%S",
+            )
+
+
+class RootArgs(
+    plugins.PluginsArgs,
+    pods.PodSetupArgs,
+    logger.LoggerArgs,
+):
+    pass
+
+
+@cli.command(None, "/", const.DESCRIPTION)
+def _(args: RootArgs):
+    const.setup()
+    logger.setup(args)
+    plugins.setup(args)
+    pods.setup(args)
+
+
+@cli.command("u", "usage", "Show usage information")
+def _():
+    print(f"Usage: {const.ARGV0} <command> [args...]")
+
+
+@cli.command("v", "version", "Show current version")
+def _():
+    print(f"CuteKit v{const.VERSION_STR}")
 
 
 def main() -> int:
     try:
         shell.mkdir(const.GLOBAL_CK_DIR)
-        extraArgs = os.environ.get("CK_EXTRA_ARGS", None)
-        args = cli.parse((extraArgs.split(" ") if extraArgs else []) + sys.argv[1:])
-        setupLogger(args.consumeOpt("verbose", False) is True)
-
-        const.setup()
-        plugins.setup(args)
-        pods.setup(args)
-        cli.exec(args)
-
+        extra = os.environ.get("CK_EXTRA_ARGS", None)
+        args = [const.ARGV0] + (extra.split(" ") if extra else []) + sys.argv[1:]
+        cli._root.eval(args)
         return 0
+
     except RuntimeError as e:
         logging.exception(e)
-        cli.error(str(e))
+        vt100.error(str(e))
         cli.usage()
+        return 1
+
     except KeyboardInterrupt:
         print()
-
-    return 1
+        return 1
diff --git a/cutekit/builder.py b/cutekit/builder.py
index a2d4d55..eefb981 100644
--- a/cutekit/builder.py
+++ b/cutekit/builder.py
@@ -6,7 +6,7 @@ from pathlib import Path
 import sys
 from typing import Callable, Literal, TextIO, Union
 
-from . import shell, rules, model, ninja, const, cli, vt100
+from . import cli, shell, rules, model, ninja, const, vt100
 
 _logger = logging.getLogger(__name__)
 
@@ -16,8 +16,8 @@ class Scope:
     registry: model.Registry
 
     @staticmethod
-    def use(args: cli.Args, props: model.Props = {}) -> "Scope":
-        registry = model.Registry.use(args, props)
+    def use(args: model.RegistryArgs) -> "Scope":
+        registry = model.Registry.use(args)
         return Scope(registry)
 
     def key(self) -> str:
@@ -33,9 +33,9 @@ class TargetScope(Scope):
     target: model.Target
 
     @staticmethod
-    def use(args: cli.Args, props: model.Props = {}) -> "TargetScope":
-        registry = model.Registry.use(args, props)
-        target = model.Target.use(args, props)
+    def use(args: model.TargetArgs) -> "TargetScope":
+        registry = model.Registry.use(args)
+        target = model.Target.use(args)
         return TargetScope(registry, target)
 
     def key(self) -> str:
@@ -384,32 +384,35 @@ def build(
 
 
 @cli.command("b", "builder", "Build/Run/Clean a component or all components")
-def _(args: cli.Args):
+def _():
     pass
 
 
+class BuildArgs(model.TargetArgs):
+    component: str = cli.operand("component", "Component to build")
+
+
 @cli.command("b", "builder/build", "Build a component or all components")
-def _(args: cli.Args):
+def _(args: BuildArgs):
     scope = TargetScope.use(args)
-    componentSpec = args.consumeArg()
     component = None
-    if componentSpec is not None:
-        component = scope.registry.lookup(componentSpec, model.Component)
+    if args.component is not None:
+        component = scope.registry.lookup(args.component, model.Component)
     build(scope, component if component is not None else "all")[0]
 
 
+class RunArgs(BuildArgs, shell.DebugArgs, shell.ProfileArgs):
+    debug: bool = cli.arg(None, "debug", "Attach a debugger")
+    profile: bool = cli.arg(None, "profile", "Profile the execution")
+    args: list[str] = cli.extra("args", "Arguments to pass to the component")
+
+
 @cli.command("r", "builder/run", "Run a component")
-def runCmd(args: cli.Args):
-    debug = args.consumeOpt("debug", False) is True
-    wait = args.consumeOpt("wait", False) is True
-    debugger = str(args.consumeOpt("debugger", "lldb"))
-
-    profile = args.consumeOpt("profile", False) is True
-    what = str(args.consumeOpt("what", "cpu"))
-    rate = int(args.consumeOpt("rate", 1000))
-
+def runCmd(args: RunArgs):
     componentSpec = args.consumeArg() or "__main__"
-    scope = TargetScope.use(args, {"debug": debug})
+
+    args.props |= {"debug": args.debug}
+    scope = TargetScope.use(args)
 
     component = scope.registry.lookup(
         componentSpec, model.Component, includeProvides=True
@@ -423,39 +426,39 @@ def runCmd(args: cli.Args):
     os.environ["CK_BUILDDIR"] = product.target.builddir
     os.environ["CK_COMPONENT"] = product.component.id
 
-    command = [str(product.path), *args.extra]
+    command = [str(product.path), *args.args]
 
-    if debug:
-        shell.debug(command, debugger=debugger, wait=wait)
-    elif profile:
-        shell.profile(command, what=what, rate=rate)
+    if args.debug:
+        shell.debug(command, debugger=args.debugger, wait=args.wait)
+    elif args.profile:
+        shell.profile(command, what=args.what, rate=args.rate)
     else:
         shell.exec(*command)
 
 
 @cli.command("t", "builder/test", "Run all test targets")
-def _(args: cli.Args):
+def _(args: RunArgs):
     # This is just a wrapper around the `run` command that try
     # to run a special hook component named __tests__.
-    args.args.insert(0, "__tests__")
+    args.component = "__tests__"
     runCmd(args)
 
 
 @cli.command("d", "builder/debug", "Debug a component")
-def _(args: cli.Args):
+def _(args: RunArgs):
     # This is just a wrapper around the `run` command that
     # always enable debug mode.
-    args.opts["debug"] = True
+    args.debug = True
     runCmd(args)
 
 
 @cli.command("c", "builder/clean", "Clean build files")
-def _(args: cli.Args):
-    model.Project.use(args)
+def _():
+    model.Project.use()
     shell.rmrf(const.BUILD_DIR)
 
 
 @cli.command("n", "builder/nuke", "Clean all build files and caches")
-def _(args: cli.Args):
-    model.Project.use(args)
+def _():
+    model.Project.use()
     shell.rmrf(const.PROJECT_CK_DIR)
diff --git a/cutekit/cli.py b/cutekit/cli.py
index 52e14d7..5888c0a 100644
--- a/cutekit/cli.py
+++ b/cutekit/cli.py
@@ -1,217 +1,685 @@
-import inspect
-import logging
 import sys
+from enum import Enum
+from types import GenericAlias
+import typing as tp
 import dataclasses as dt
 
-from pathlib import Path
-from typing import Optional, Union, Callable
-
-from . import const, vt100
-
-Value = Union[str, bool, int]
-
-_logger = logging.getLogger(__name__)
+from typing import Any, Callable, Optional, Union
+from cutekit import vt100, const
 
 
-class Args:
-    opts: dict[str, Value]
-    args: list[str]
-    extra: list[str]
+T = tp.TypeVar("T")
 
-    def __init__(self):
-        self.opts = {}
-        self.args = []
-        self.extra = []
+# --- Scan -------------------------------------------------------------- #
 
-    def consumePrefix(self, prefix: str) -> dict[str, Value]:
-        result: dict[str, Value] = {}
-        copy = self.opts.copy()
-        for key, value in copy.items():
-            if key.startswith(prefix):
-                result[key[len(prefix) :]] = value
-                del self.opts[key]
+
+class Scan:
+    _src: str
+    _off: int
+    _save: list[int]
+
+    def __init__(self, src: str, off: int = 0):
+        self._src = src
+        self._off = 0
+        self._save = []
+
+    def curr(self) -> str:
+        if self.eof():
+            return "\0"
+        return self._src[self._off]
+
+    def next(self) -> str:
+        if self.eof():
+            return "\0"
+
+        self._off += 1
+        return self.curr()
+
+    def peek(self, off: int = 1) -> str:
+        if self._off + off >= len(self._src):
+            return "\0"
+
+        return self._src[self._off + off]
+
+    def eof(self) -> bool:
+        return self._off >= len(self._src)
+
+    def skipStr(self, s: str) -> bool:
+        if self._src[self._off :].startswith(s):
+            self._off += len(s)
+            return True
+
+        return False
+
+    def isStr(self, s: str) -> bool:
+        self.save()
+        if self.skipStr(s):
+            self.restore()
+            return True
+
+        self.restore()
+        return False
+
+    def save(self) -> None:
+        self._save.append(self._off)
+
+    def restore(self) -> None:
+        self._off = self._save.pop()
+
+    def skipWhitespace(self) -> bool:
+        result = False
+        while not self.eof() and self.curr().isspace():
+            self.next()
+            result = True
         return result
 
-    def consumeOpt(self, key: str, default: Value = False) -> Value:
-        if key in self.opts:
-            result = self.opts[key]
-            del self.opts[key]
-            return result
-        return default
+    def skipSeparator(self, sep: str) -> bool:
+        self.save()
+        self.skipWhitespace()
+        if self.skipStr(sep):
+            self.skipWhitespace()
+            return True
 
-    def tryConsumeOpt(self, key: str) -> Optional[Value]:
-        if key in self.opts:
-            result = self.opts[key]
-            del self.opts[key]
-            return result
-        return None
+        self.restore()
+        return False
 
-    def consumeArg(self, default: Optional[str] = None) -> Optional[str]:
-        if len(self.args) == 0:
-            return default
+    def isSeparator(self, sep: str) -> bool:
+        self.save()
+        self.skipWhitespace()
+        if self.skipStr(sep):
+            self.skipWhitespace()
+            self.restore()
+            return True
 
-        first = self.args[0]
-        del self.args[0]
-        return first
+        self.restore()
+        return False
+
+    def skipKeyword(self, keyword: str) -> bool:
+        self.save()
+        self.skipWhitespace()
+        if self.skipStr(keyword) and not self.curr().isalnum():
+            return True
+
+        self.restore()
+        return False
+
+    def isKeyword(self, keyword: str) -> bool:
+        self.save()
+        self.skipWhitespace()
+        if self.skipStr(keyword) and not self.curr().isalnum():
+            self.restore()
+            return True
+
+        self.restore()
+        return False
 
 
-def parse(args: list[str]) -> Args:
-    result = Args()
+# --- Parser ------------------------------------------------------------ #
 
-    for i in range(len(args)):
-        arg = args[i]
-        if arg.startswith("--") and not arg == "--":
-            if "=" in arg:
-                key, value = arg[2:].split("=", 1)
-                result.opts[key] = value
-            else:
-                result.opts[arg[2:]] = True
-        elif arg == "--":
-            result.extra += args[i + 1 :]
+PrimitiveValue = str | bool | int
+Object = dict[str, PrimitiveValue]
+List = list[PrimitiveValue]
+Value = str | bool | int | Object | List
+
+
+@dt.dataclass
+class Token:
+    pass
+
+
+@dt.dataclass
+class ArgumentToken(Token):
+    key: str
+    subkey: Optional[str]
+    value: Value
+    short: bool
+
+
+@dt.dataclass
+class OperandToken(Token):
+    value: str
+
+
+@dt.dataclass
+class ExtraToken(Token):
+    args: list[str]
+
+
+def _parseIdent(s: Scan) -> str:
+    res = ""
+    while not s.eof() and (s.curr().isalnum() or s.curr() in "_-+"):
+        res += s.curr()
+        s.next()
+    return res
+
+
+def _parseUntilComma(s: Scan) -> str:
+    res = ""
+    while not s.eof() and s.curr() != ",":
+        res += s.curr()
+        s.next()
+    return res
+
+
+def _expectIdent(s: Scan) -> str:
+    res = _parseIdent(s)
+    if len(res) == 0:
+        raise RuntimeError("Expected identifier")
+    return res
+
+
+def _parseString(s: Scan, quote: str) -> str:
+    s.skipStr(quote)
+    res = ""
+    escaped = False
+    while not s.eof():
+        c = s.curr()
+        if escaped:
+            res += c
+            escaped = False
+        elif c == "\\":
+            escaped = True
+        elif c == quote:
             break
         else:
-            result.args.append(arg)
-
-    return result
+            res += c
+        s.next()
+    if not s.skipStr(quote):
+        raise RuntimeError("Unterminated string")
+    return res
 
 
-Callback = Callable[[Args], None]
+def _tryParseInt(ident) -> Optional[int]:
+    try:
+        return int(ident)
+    except ValueError:
+        return None
+
+
+def _parsePrimitive(s: Scan) -> PrimitiveValue:
+    if s.curr() == '"':
+        return _parseString(s, '"')
+    elif s.curr() == "'":
+        return _parseString(s, "'")
+    else:
+        ident = _parseUntilComma(s)
+
+        if ident in ("true", "True", "y", "yes", "Y", "Yes"):
+            return True
+        elif ident in ("false", "False", "n", "no", "N", "No"):
+            return False
+        elif n := _tryParseInt(ident):
+            return n
+        else:
+            return ident
+
+
+def _parseValue(s: Scan) -> Value:
+    lhs = _parsePrimitive(s)
+    if s.eof():
+        return lhs
+    values: List = [lhs]
+    while not s.eof() and s.skipStr(","):
+        values.append(_parsePrimitive(s))
+    return values
+
+
+def parseValue(s: str) -> Value:
+    return _parseValue(Scan(s))
+
+
+def parseArg(arg: str) -> list[Token]:
+    s = Scan(arg)
+    if s.skipStr("--"):
+        key = _expectIdent(s)
+        subkey = ""
+        if s.skipStr(":"):
+            subkey = _expectIdent(s)
+        if s.skipStr("="):
+            value = _parseValue(s)
+        else:
+            value = True
+        return [ArgumentToken(key, subkey, value, False)]
+    elif s.skipStr("-"):
+        res = []
+        while not s.eof():
+            key = s.curr()
+            if not key.isalnum():
+                raise RuntimeError("Expected alphanumeric")
+            s.next()
+            res.append(ArgumentToken(key, None, True, True))
+        return tp.cast(list[Token], res)
+    else:
+        return [OperandToken(arg)]
+
+
+def parseArgs(args: list[str]) -> list[Token]:
+    res: list[Token] = []
+    while len(args) > 0:
+        arg = args.pop(0)
+        if arg == "--":
+            res.append(ExtraToken(args))
+            break
+        else:
+            res.extend(parseArg(arg))
+    return res
+
+
+# --- Schema ----------------------------------------------------------------- #
+
+
+class FieldKind(Enum):
+    FLAG = 0
+    OPERAND = 1
+    EXTRA = 2
+
+
+@dt.dataclass
+class Field:
+    kind: FieldKind
+    shortName: Optional[str]
+    longName: str
+    description: str = ""
+    default: Any = None
+
+    _fieldName: str | None = dt.field(init=False, default=None)
+    _fieldType: type | None = dt.field(init=False, default=None)
+
+    def bind(self, typ: type, name: str):
+        self._fieldName = name
+        self._fieldType = typ.__annotations__[name]
+        if self.longName is None:
+            self.longName = name
+
+    def isList(self) -> bool:
+        return (
+            isinstance(self._fieldType, GenericAlias)
+            and self._fieldType.__origin__ == list
+        )
+
+    def isDict(self) -> bool:
+        return (
+            isinstance(self._fieldType, GenericAlias)
+            and self._fieldType.__origin__ == dict
+        )
+
+    def innerType(self) -> type:
+        if self.isList():
+            return self._fieldType.__args__[0]
+
+        if self.isDict():
+            return self._fieldType.__args__[1]
+
+        return self._fieldType
+
+    def defaultValue(self) -> Any:
+        if self._fieldType is None:
+            return None
+
+        if self.default is not None:
+            return self.default
+
+        if self._fieldType == bool:
+            return False
+        elif self._fieldType == int:
+            return 0
+        elif self._fieldType == str:
+            return ""
+        elif self.isList():
+            return []
+        elif self.isDict():
+            return {}
+        else:
+            return None
+
+    def setDefault(self, obj: Any):
+        if self._fieldName:
+            setattr(obj, self._fieldName, self.defaultValue())
+
+    def castValue(self, val: Any, subkey: Optional[str]):
+        try:
+            val = int(val)
+        except ValueError:
+            pass
+        except TypeError:
+            pass
+
+        if isinstance(val, list):
+            return [self.castValue(v, subkey) for v in val]
+
+        val = self.innerType()(val)
+
+        if self.isDict() and subkey:
+            return {subkey: val}
+
+        if self.isDict():
+            return {str(val): True}
+
+        return val
+
+    def putValue(self, obj: Any, value: Any, subkey: Optional[str] = None):
+        value = self.castValue(value, subkey)
+        field = getattr(obj, self._fieldName)
+        if isinstance(field, list):
+            if isinstance(value, list):
+                field.extend(value)
+            else:
+                field.append(value)
+        elif isinstance(field, dict):
+            field.update(value)
+        else:
+            setattr(obj, self._fieldName, value)
+
+    def getAttr(self, obj: Any) -> Any:
+        return getattr(obj, self._fieldName)
+
+
+def arg(
+    shortName: str | None = None,
+    longName: str = "",
+    description: str = "",
+    default: Any = None,
+) -> Any:
+    return Field(FieldKind.FLAG, shortName, longName, description, default)
+
+
+def operand(longName: str = "", description: str = "") -> Any:
+    return Field(FieldKind.OPERAND, None, longName, description)
+
+
+def extra(longName: str = "", description: str = "") -> Any:
+    return Field(FieldKind.EXTRA, None, longName, description)
+
+
+@dt.dataclass
+class Schema:
+    typ: Optional[type] = None
+    args: list[Field] = dt.field(default_factory=list)
+    operands: list[Field] = dt.field(default_factory=list)
+    extras: Optional[Field] = None
+
+    @staticmethod
+    def extract(typ: type) -> "Schema":
+        s = Schema(typ)
+
+        for f in typ.__annotations__.keys():
+            field = getattr(typ, f, None)
+
+            if field is None:
+                raise ValueError(f"Field '{f}' is not defined")
+
+            if not isinstance(field, Field):
+                raise ValueError(f"Field '{f}' is not a Field")
+
+            field.bind(typ, f)
+
+            if field.kind == FieldKind.FLAG:
+                s.args.append(field)
+            elif field.kind == FieldKind.OPERAND:
+                s.operands.append(field)
+            elif field.kind == FieldKind.EXTRA:
+                if s.extras:
+                    raise ValueError("Only one extra argument is allowed")
+                s.extras = field
+
+        # now move to the base class
+        for base in typ.__bases__:
+            if base == object:
+                continue
+            baseSchema = Schema.extract(base)
+            s.args.extend(baseSchema.args)
+            s.operands.extend(baseSchema.operands)
+            if not s.extras:
+                s.extras = baseSchema.extras
+            elif baseSchema.extras:
+                raise ValueError("Only one extra argument is allowed")
+
+        return s
+
+    @staticmethod
+    def extractFromCallable(fn: tp.Callable) -> Optional["Schema"]:
+        typ: type | None = (
+            None
+            if len(fn.__annotations__) == 0
+            else next(iter(fn.__annotations__.values()))
+        )
+
+        if typ is None:
+            return None
+
+        return Schema.extract(typ)
+
+    def usage(self) -> str:
+        res = ""
+        for arg in self.args:
+            flag = ""
+            if arg.shortName:
+                flag += f"-{arg.shortName}"
+
+            if arg.longName:
+                if flag:
+                    flag += ", "
+                flag += f"--{arg.longName}"
+            res += f"[{flag}] "
+        for operand in self.operands:
+            res += f"<{operand.longName}> "
+        if self.extras:
+            res += f"[-- {self.extras.longName}]"
+        return res
+
+    def _lookupArg(self, key: str, short: bool) -> Field:
+        for arg in self.args:
+            if short and arg.shortName == key:
+                return arg
+            elif not short and arg.longName == key:
+                return arg
+        raise ValueError(f"Unknown argument '{key}'")
+
+    def _setOperand(self, tok: OperandToken):
+        return
+
+    def _instanciate(self) -> Any:
+        if self.typ is None:
+            return None
+        res = self.typ()
+        for arg in self.args:
+            arg.setDefault(res)
+        return res
+
+    def parse(self, args: list[str]) -> Any:
+        res = self._instanciate()
+        if res is None:
+            if len(args) > 0:
+                raise ValueError("Unexpected arguments")
+            else:
+                return None
+
+        stack = args[:]
+        while len(stack) > 0:
+            if stack[0] == "--":
+                if not self.extras:
+                    raise ValueError("Unexpected '--'")
+                self._setExtra(res, stack.pop(0))
+                break
+
+            toks = parseArg(stack.pop(0))
+            for tok in toks:
+                if isinstance(tok, ArgumentToken):
+                    arg = self._lookupArg(tok.key, tok.short)
+                    arg.putValue(res, tok.value, tok.subkey)
+                elif isinstance(tok, OperandToken):
+                    self._setOperand(tok)
+                else:
+                    raise ValueError(f"Unexpected token: {type(tok)}")
+
+        return res
 
 
 @dt.dataclass
 class Command:
     shortName: Optional[str]
     longName: str
-    helpText: str
-    isPlugin: bool
-    callback: Callback
+    description: str = ""
+    epilog: Optional[str] = None
 
+    schema: Optional[Schema] = None
+    callable: Optional[tp.Callable] = None
     subcommands: dict[str, "Command"] = dt.field(default_factory=dict)
+    populated: bool = False
+
+    def _spliceArgs(self, args: list[str]) -> tuple[list[str], list[str]]:
+        rest = args[:]
+        curr = []
+        if len(self.subcommands) > 0:
+            while len(rest) > 0 and rest[0].startswith("-") and rest[0] != "--":
+                curr.append(rest.pop(0))
+        else:
+            curr = rest
+            rest = []
+        return curr, rest
+
+    def help(self, cmd):
+        vt100.title(f"{cmd}")
+        print()
+
+        vt100.subtitle("Usage")
+        print(vt100.indent(f"{cmd}{self.usage()}"))
+        print()
+
+        vt100.subtitle("Description")
+        print(vt100.indent(self.description))
+        print()
+
+        if self.schema and any(self.schema.args):
+            vt100.subtitle("Options")
+            for arg in self.schema.args:
+                flag = ""
+                if arg.shortName:
+                    flag += f"-{arg.shortName}"
+
+                if arg.longName:
+                    if flag:
+                        flag += ", "
+                    flag += f"--{arg.longName}"
+
+                if arg.description:
+                    flag += f" {arg.description}"
+
+                print(vt100.indent(flag))
+            print()
+
+        if any(self.subcommands):
+            vt100.subtitle("Subcommands")
+            for name, sub in self.subcommands.items():
+                print(
+                    vt100.indent(
+                        f"{vt100.GREEN}{sub.shortName or ' '}{vt100.RESET}  {name} - {sub.description}"
+                    )
+                )
+            print()
+
+        if self.epilog:
+            print(self.epilog)
+            print()
+
+        # for name, sub in self.subcommands.items():
+        #     sub.help(f"{cmd} {name}")
+
+    def usage(self) -> str:
+        res = " "
+        if self.schema:
+            res += self.schema.usage()
+
+        if len(self.subcommands) == 1:
+            res += "[subcommand] [args...]"
+
+        elif len(self.subcommands) > 0:
+            res += "{"
+            first = True
+            for name, cmd in self.subcommands.items():
+                if not first:
+                    res += "|"
+                res += f"{name}"
+                first = False
+            res += "}"
+
+            res += " [args...]"
+
+        return res
+
+    def lookupSubcommand(self, name: str) -> "Command":
+        if name in self.subcommands:
+            return self.subcommands[name]
+        for sub in self.subcommands.values():
+            if sub.shortName == name:
+                return sub
+        raise ValueError(f"Unknown subcommand '{name}'")
+
+    def eval(self, args: list[str]):
+        cmd = args.pop(0)
+        curr, rest = self._spliceArgs(args)
+        if "-h" in curr or "--help" in curr:
+            self.help(cmd)
+            return
+        if "-u" in curr or "--usage" in curr:
+            print("Usage: " + cmd + self.usage(), end="\n\n")
+            return
+
+        try:
+            if self.callable:
+                if self.schema:
+                    args = self.schema.parse(curr)
+                    self.callable(args)
+                else:
+                    self.callable()
+
+            if self.subcommands:
+                if len(rest) == 0 and not self.populated:
+                    raise ValueError("Expected subcommand")
+                else:
+                    self.lookupSubcommand(rest[0]).eval(rest)
+            elif len(rest) > 0:
+                raise ValueError(f"Unknown operand '{rest[0]}'")
+
+        except ValueError as e:
+            vt100.error(str(e))
+            print("Usage: " + cmd + self.usage(), end="\n\n")
+            return
 
 
-commands: dict[str, Command] = {}
+_root = Command(None, const.ARGV0)
 
 
-def command(shortName: Optional[str], longName: str, helpText: str):
-    curframe = inspect.currentframe()
-    calframe = inspect.getouterframes(curframe, 2)
+def _splitPath(path: str) -> list[str]:
+    if path == "/":
+        return []
+    return path.split("/")
 
-    def wrap(fn: Callable[[Args], None]):
-        _logger.debug(f"Registering command {longName}")
-        path = longName.split("/")
-        parent = commands
-        for p in path[:-1]:
-            parent = parent[p].subcommands
-        parent[path[-1]] = Command(
-            shortName,
-            path[-1],
-            helpText,
-            Path(calframe[1].filename).parent != Path(__file__).parent,
-            fn,
-        )
 
+def _resolvePath(path: list[str]) -> Command:
+    if path == "/":
+        return _root
+    cmd = _root
+    for name in path:
+        if name not in cmd.subcommands:
+            cmd.subcommands[name] = Command(None, name)
+        cmd = cmd.subcommands[name]
+    return cmd
+
+
+def command(shortName: str, longName: str, description: str = "") -> Callable:
+    def wrap(fn: Callable):
+        schema = Schema.extractFromCallable(fn)
+        path = _splitPath(longName)
+        cmd = _resolvePath(path)
+        if cmd.populated:
+            raise ValueError(f"Command '{longName}' is already defined")
+        cmd.shortName = shortName
+        cmd.longName = len(path) > 0 and path[-1] or ""
+        cmd.description = description
+        cmd.schema = schema
+        cmd.callable = fn
+        cmd.populated = True
         return fn
 
     return wrap
-
-
-# --- Builtins Commands ------------------------------------------------------ #
-
-
-@command("u", "usage", "Show usage information")
-def usage(args: Optional[Args] = None):
-    print(f"Usage: {const.ARGV0} <command> [args...]")
-
-
-def error(msg: str) -> None:
-    print(f"{vt100.RED}Error:{vt100.RESET} {msg}\n", file=sys.stderr)
-
-
-def warning(msg: str) -> None:
-    print(f"{vt100.YELLOW}Warning:{vt100.RESET} {msg}\n", file=sys.stderr)
-
-
-def ask(msg: str, default: Optional[bool] = None) -> bool:
-    if default is None:
-        msg = f"{msg} [y/n] "
-    elif default:
-        msg = f"{msg} [Y/n] "
-    else:
-        msg = f"{msg} [y/N] "
-
-    while True:
-        result = input(msg).lower()
-        if result in ("y", "yes"):
-            return True
-        elif result in ("n", "no"):
-            return False
-        elif result == "" and default is not None:
-            return default
-
-
-@command("h", "help", "Show this help message")
-def helpCmd(args: Args):
-    usage()
-
-    print()
-
-    vt100.title("Description")
-    print(f"    {const.DESCRIPTION}")
-
-    print()
-    vt100.title("Commands")
-    for cmd in sorted(commands.values(), key=lambda c: c.longName):
-        if cmd.longName.startswith("_") or len(cmd.subcommands) > 0:
-            continue
-
-        pluginText = ""
-        if cmd.isPlugin:
-            pluginText = f"{vt100.CYAN}(plugin){vt100.RESET}"
-
-        print(
-            f" {vt100.GREEN}{cmd.shortName or ' '}{vt100.RESET}  {cmd.longName} - {cmd.helpText} {pluginText}"
-        )
-
-    for cmd in sorted(commands.values(), key=lambda c: c.longName):
-        if cmd.longName.startswith("_") or len(cmd.subcommands) == 0:
-            continue
-
-        print()
-        vt100.title(f"{cmd.longName.capitalize()} - {cmd.helpText}")
-        for subcmd in sorted(cmd.subcommands.values(), key=lambda c: c.longName):
-            pluginText = ""
-            if subcmd.isPlugin:
-                pluginText = f"{vt100.CYAN}(plugin){vt100.RESET}"
-
-            print(
-                f"     {vt100.GREEN}{subcmd.shortName or ' '}{vt100.RESET}  {subcmd.longName} - {subcmd.helpText} {pluginText}"
-            )
-
-    print()
-    vt100.title("Logging")
-    print("    Logs are stored in:")
-    print(f"     - {const.PROJECT_LOG_FILE}")
-    print(f"     - {const.GLOBAL_LOG_FILE}")
-
-
-@command("v", "version", "Show current version")
-def versionCmd(args: Args):
-    print(f"CuteKit v{const.VERSION_STR}")
-
-
-def exec(args: Args, cmds=commands):
-    cmd = args.consumeArg()
-
-    if cmd is None:
-        raise RuntimeError("No command specified")
-
-    for c in cmds.values():
-        if c.shortName == cmd or c.longName == cmd:
-            if len(c.subcommands) > 0:
-                exec(args, c.subcommands)
-                return
-            else:
-                c.callback(args)
-                return
-
-    raise RuntimeError(f"Unknown command {cmd}")
diff --git a/cutekit/graph.py b/cutekit/graph.py
deleted file mode 100644
index aac391e..0000000
--- a/cutekit/graph.py
+++ /dev/null
@@ -1,95 +0,0 @@
-import os
-
-from typing import Optional, cast
-
-from . import vt100, cli, model
-
-
-def view(
-    registry: model.Registry,
-    target: model.Target,
-    scope: Optional[str] = None,
-    showExe: bool = True,
-    showDisabled: bool = False,
-):
-    from graphviz import Digraph  # type: ignore
-
-    g = Digraph(target.id, filename="graph.gv")
-
-    g.attr("graph", splines="ortho", rankdir="BT", ranksep="1.5")
-    g.attr("node", shape="ellipse")
-    g.attr(
-        "graph",
-        label=f"<<B>{scope or 'Full Dependency Graph'}</B><BR/>{target.id}>",
-        labelloc="t",
-    )
-
-    scopeInstance = None
-
-    if scope is not None:
-        scopeInstance = registry.lookup(scope, model.Component)
-
-    for component in registry.iterEnabled(target):
-        if not component.type == model.Kind.LIB and not showExe:
-            continue
-
-        if (
-            scopeInstance is not None
-            and component.id != scope
-            and component.id not in scopeInstance.resolved[target.id].required
-        ):
-            continue
-
-        if component.resolved[target.id].enabled:
-            fillcolor = "lightgrey" if component.type == model.Kind.LIB else "lightblue"
-            shape = "plaintext" if not scope == component.id else "box"
-
-            g.node(
-                component.id,
-                f"<<B>{component.id}</B><BR/>{vt100.wordwrap(component.description, 40,newline='<BR/>')}>",
-                shape=shape,
-                style="filled",
-                fillcolor=fillcolor,
-            )
-
-            for req in component.requires:
-                g.edge(component.id, req)
-
-            for req in component.provides:
-                isChosen = target.routing.get(req, None) == component.id
-
-                g.edge(
-                    req,
-                    component.id,
-                    arrowhead="none",
-                    color=("blue" if isChosen else "black"),
-                )
-        elif showDisabled:
-            g.node(
-                component.id,
-                f"<<B>{component.id}</B><BR/>{vt100.wordwrap(component.description, 40,newline='<BR/>')}<BR/><BR/><I>{vt100.wordwrap(str(component.resolved[target.id].reason), 40,newline='<BR/>')}</I>>",
-                shape="plaintext",
-                style="filled",
-                fontcolor="#999999",
-                fillcolor="#eeeeee",
-            )
-
-            for req in component.requires:
-                g.edge(component.id, req, color="#aaaaaa")
-
-            for req in component.provides:
-                g.edge(req, component.id, arrowhead="none", color="#aaaaaa")
-
-    g.view(filename=os.path.join(target.builddir, "graph.gv"))
-
-
-@cli.command("g", "graph", "Show the dependency graph")
-def _(args: cli.Args):
-    registry = model.Registry.use(args)
-    target = model.Target.use(args)
-
-    scope = cast(Optional[str], args.tryConsumeOpt("scope"))
-    onlyLibs = args.consumeOpt("only-libs", False) is True
-    showDisabled = args.consumeOpt("show-disabled", False) is True
-
-    view(registry, target, scope=scope, showExe=not onlyLibs, showDisabled=showDisabled)
diff --git a/cutekit/model.py b/cutekit/model.py
index b076e22..b6dbbb4 100644
--- a/cutekit/model.py
+++ b/cutekit/model.py
@@ -7,11 +7,10 @@ from enum import Enum
 from typing import Any, Generator, Optional, Type, cast
 from pathlib import Path
 from dataclasses_json import DataClassJsonMixin
-from typing import Union
 
 from cutekit import const, shell
 
-from . import jexpr, compat, utils, cli, vt100
+from . import cli, jexpr, compat, utils, vt100
 
 _logger = logging.getLogger(__name__)
 
@@ -171,7 +170,7 @@ class Project(Manifest):
                 Project.fetchs(project.extern)
 
     @staticmethod
-    def use(args: cli.Args) -> "Project":
+    def use() -> "Project":
         global _project
         if _project is None:
             _project = Project.ensure()
@@ -179,29 +178,37 @@ class Project(Manifest):
 
 
 @cli.command("m", "model", "Manage the model")
-def _(args: cli.Args):
+def _():
     pass
 
 
 @cli.command("i", "model/install", "Install required external packages")
-def _(args: cli.Args):
-    project = Project.use(args)
+def _():
+    project = Project.use()
     Project.fetchs(project.extern)
 
 
+class ModelInitArgs:
+    repo: str = cli.arg(
+        None,
+        "repo",
+        "The repository to fetch templates from",
+        default=const.DEFAULT_REPO_TEMPLATES,
+    )
+    list: bool = cli.arg("l", "list", "List available templates")
+    template: str = cli.operand("template", "The template to use")
+    name: str = cli.operand("name", "The name of the project")
+
+
 @cli.command("I", "model/init", "Initialize a new project")
-def _(args: cli.Args):
+def _(args: ModelInitArgs):
     import requests
 
-    repo = args.consumeOpt("repo", const.DEFAULT_REPO_TEMPLATES)
-    list = args.consumeOpt("list")
-
-    template = args.consumeArg()
-    name = args.consumeArg()
-
     _logger.info("Fetching registry...")
 
-    r = requests.get(f"https://raw.githubusercontent.com/{repo}/main/registry.json")
+    r = requests.get(
+        f"https://raw.githubusercontent.com/{args.repo}/main/registry.json"
+    )
 
     if r.status_code != 200:
         _logger.error("Failed to fetch registry")
@@ -209,34 +216,34 @@ def _(args: cli.Args):
 
     registry = r.json()
 
-    if list:
+    if args.list:
         print(
             "\n".join(f"* {entry['id']} - {entry['description']}" for entry in registry)
         )
         return
 
-    if not template:
+    if not args.template:
         raise RuntimeError("Template not specified")
 
     def template_match(t: jexpr.Json) -> str:
-        return t["id"] == template
+        return t["id"] == args.template
 
     if not any(filter(template_match, registry)):
-        raise LookupError(f"Couldn't find a template named {template}")
+        raise LookupError(f"Couldn't find a template named {args.template}")
 
-    if not name:
-        _logger.info(f"No name was provided, defaulting to {template}")
-        name = template
+    if not args.name:
+        _logger.info(f"No name was provided, defaulting to {args.template}")
+        args.name = args.template
 
-    if os.path.exists(name):
-        raise RuntimeError(f"Directory {name} already exists")
+    if os.path.exists(args.name):
+        raise RuntimeError(f"Directory {args.name} already exists")
 
-    print(f"Creating project {name} from template {template}...")
-    shell.cloneDir(f"https://github.com/{repo}", template, name)
-    print(f"Project {name} created\n")
+    print(f"Creating project {args.name} from template {args.template}...")
+    shell.cloneDir(f"https://github.com/{args.repo}", args.template, args.name)
+    print(f"Project {args.name} created\n")
 
     print("We suggest that you begin by typing:")
-    print(f"  {vt100.GREEN}cd {name}{vt100.RESET}")
+    print(f"  {vt100.GREEN}cd {args.name}{vt100.RESET}")
     print(
         f"  {vt100.GREEN}cutekit install{vt100.BRIGHT_BLACK} # Install external packages{vt100.RESET}"
     )
@@ -263,6 +270,17 @@ DEFAULT_TOOLS: Tools = {
 }
 
 
+class RegistryArgs:
+    props: dict[str, str] = cli.arg(None, "prop", "Set a property")
+    mixins: list[str] = cli.arg(None, "mixins", "Apply mixins")
+
+
+class TargetArgs(RegistryArgs):
+    target: str = cli.arg(
+        None, "target", "The target to use", default="host-" + shell.uname().machine
+    )
+
+
 @dt.dataclass
 class Target(Manifest):
     props: Props = dt.field(default_factory=dict)
@@ -287,10 +305,9 @@ class Target(Manifest):
         return os.path.join(const.BUILD_DIR, f"{self.id}{postfix}")
 
     @staticmethod
-    def use(args: cli.Args, props: Props = {}) -> "Target":
-        registry = Registry.use(args, props)
-        targetSpec = str(args.consumeOpt("target", "host-" + shell.uname().machine))
-        return registry.ensure(targetSpec, Target)
+    def use(args: TargetArgs) -> "Target":
+        registry = Registry.use(args)
+        return registry.ensure(args.target, Target)
 
     def route(self, componentSpec: str):
         """
@@ -536,18 +553,14 @@ class Registry(DataClassJsonMixin):
         return m
 
     @staticmethod
-    def use(args: cli.Args, props: Props = {}) -> "Registry":
+    def use(args: RegistryArgs) -> "Registry":
         global _registry
 
         if _registry is not None:
             return _registry
 
-        project = Project.use(args)
-        mixins = str(args.consumeOpt("mixins", "")).split(",")
-        if mixins == [""]:
-            mixins = []
-        props |= cast(dict[str, str], args.consumePrefix("prop:"))
-        _registry = Registry.load(project, mixins, props)
+        project = Project.use()
+        _registry = Registry.load(project, args.mixins, args.props)
         return _registry
 
     @staticmethod
@@ -608,11 +621,11 @@ class Registry(DataClassJsonMixin):
                             )
                         else:
                             victim.resolved[target.id].injected.append(c.id)
-                            victim.resolved[
-                                target.id
-                            ].required = utils.uniqPreserveOrder(
-                                c.resolved[target.id].required
-                                + victim.resolved[target.id].required
+                            victim.resolved[target.id].required = (
+                                utils.uniqPreserveOrder(
+                                    c.resolved[target.id].required
+                                    + victim.resolved[target.id].required
+                                )
                             )
 
             # Resolve tooling
@@ -639,9 +652,8 @@ class Registry(DataClassJsonMixin):
 
 
 @cli.command("l", "model/list", "List all components and targets")
-def _(args: cli.Args):
+def _(args: TargetArgs):
     registry = Registry.use(args)
-
     components = list(registry.iter(Component))
     targets = list(registry.iter(Target))
 
@@ -659,3 +671,103 @@ def _(args: cli.Args):
     else:
         print(vt100.p(", ".join(map(lambda m: m.id, targets))))
     print()
+
+
+def view(
+    registry: Registry,
+    target: Target,
+    scope: Optional[str] = None,
+    showExe: bool = True,
+    showDisabled: bool = False,
+):
+    from graphviz import Digraph  # type: ignore
+
+    g = Digraph(target.id, filename="graph.gv")
+
+    g.attr("graph", splines="ortho", rankdir="BT", ranksep="1.5")
+    g.attr("node", shape="ellipse")
+    g.attr(
+        "graph",
+        label=f"<<B>{scope or 'Full Dependency Graph'}</B><BR/>{target.id}>",
+        labelloc="t",
+    )
+
+    scopeInstance = None
+
+    if scope is not None:
+        scopeInstance = registry.lookup(scope, Component)
+
+    for component in registry.iterEnabled(target):
+        if not component.type == Kind.LIB and not showExe:
+            continue
+
+        if (
+            scopeInstance is not None
+            and component.id != scope
+            and component.id not in scopeInstance.resolved[target.id].required
+        ):
+            continue
+
+        if component.resolved[target.id].enabled:
+            fillcolor = "lightgrey" if component.type == model.Kind.LIB else "lightblue"
+            shape = "plaintext" if not scope == component.id else "box"
+
+            g.node(
+                component.id,
+                f"<<B>{component.id}</B><BR/>{vt100.wordwrap(component.description, 40,newline='<BR/>')}>",
+                shape=shape,
+                style="filled",
+                fillcolor=fillcolor,
+            )
+
+            for req in component.requires:
+                g.edge(component.id, req)
+
+            for req in component.provides:
+                isChosen = target.routing.get(req, None) == component.id
+
+                g.edge(
+                    req,
+                    component.id,
+                    arrowhead="none",
+                    color=("blue" if isChosen else "black"),
+                )
+        elif showDisabled:
+            g.node(
+                component.id,
+                f"<<B>{component.id}</B><BR/>{vt100.wordwrap(component.description, 40,newline='<BR/>')}<BR/><BR/><I>{vt100.wordwrap(str(component.resolved[target.id].reason), 40,newline='<BR/>')}</I>>",
+                shape="plaintext",
+                style="filled",
+                fontcolor="#999999",
+                fillcolor="#eeeeee",
+            )
+
+            for req in component.requires:
+                g.edge(component.id, req, color="#aaaaaa")
+
+            for req in component.provides:
+                g.edge(req, component.id, arrowhead="none", color="#aaaaaa")
+
+    g.view(filename=os.path.join(target.builddir, "graph.gv"))
+
+
+class GraphArgs(TargetArgs):
+    onlyLibs: bool = cli.arg(False, "only-libs", "Show only libraries")
+    showDisabled: bool = cli.arg(False, "show-disabled", "Show disabled components")
+    scope: str = cli.arg(
+        None, "scope", "Show only the specified component and its dependencies"
+    )
+
+
+@cli.command("g", "model/graph", "Show the dependency graph")
+def _(args: GraphArgs):
+    registry = Registry.use(args)
+    target = Target.use(args)
+
+    view(
+        registry,
+        target,
+        scope=args.scope,
+        showExe=not args.onlyLibs,
+        showDisabled=args.showDisabled,
+    )
diff --git a/cutekit/plugins.py b/cutekit/plugins.py
index 5d38187..7c7bda4 100644
--- a/cutekit/plugins.py
+++ b/cutekit/plugins.py
@@ -2,7 +2,7 @@ import logging
 import os
 import sys
 
-from . import shell, model, const, cli
+from . import cli, shell, model, const, vt100
 
 import importlib.util as importlib
 
@@ -24,7 +24,7 @@ def load(path: str):
         spec.loader.exec_module(module)
     except Exception as e:
         _logger.error(f"Failed to load plugin {path}: {e}")
-        cli.warning(f"Plugin {path} loading skipped due to error")
+        vt100.warning(f"Plugin {path} loading skipped due to error")
 
 
 def loadAll():
@@ -51,6 +51,10 @@ def loadAll():
                     load(os.path.join(pluginDir, files))
 
 
-def setup(args: cli.Args):
-    if not bool(args.consumeOpt("safemode", False)):
+class PluginsArgs:
+    safemod: bool = cli.arg(None, "safemode", "disable plugin loading")
+
+
+def setup(args: PluginsArgs):
+    if args.safemod:
         loadAll()
diff --git a/cutekit/pods.py b/cutekit/pods.py
index 67fe65d..30a9935 100644
--- a/cutekit/pods.py
+++ b/cutekit/pods.py
@@ -77,16 +77,42 @@ IMAGES: dict[str, Image] = {
 }
 
 
-def setup(args: cli.Args):
+class PodSetupArgs:
+    pod: str | bool | None = cli.arg(
+        None, "pod", "Reincarnate cutekit within the specified pod"
+    )
+
+
+class PodNameArg:
+    name: str = cli.arg(None, "name", "Name of the pod")
+
+
+class PodImageArg:
+    image: str = cli.arg(None, "image", "Base image to use for the pod")
+
+
+class PodCreateArgs(PodNameArg, PodImageArg):
+    pass
+
+
+class PodKillArgs(PodNameArg):
+    all: bool = cli.arg("a", "all", "Kill all pods")
+
+
+class PodExecArgs(PodNameArg):
+    cmd: str = cli.operand("cmd", "Command to execute")
+    args: list[str] = cli.extra("args", "Extra arguments to pass to the command")
+
+
+def setup(args: PodSetupArgs):
     """
     Reincarnate cutekit within a docker container, this is
     useful for cross-compiling
     """
-    pod = args.consumeOpt("pod", False)
-    if not pod:
+    if not args.pod:
         return
-    if isinstance(pod, str):
-        pod = pod.strip()
+    if isinstance(args.pod, str):
+        pod = args.pod.strip()
         pod = podPrefix + pod
     if pod is True:
         pod = defaultPodName
@@ -114,7 +140,7 @@ def setup(args: cli.Args):
 
 
 @cli.command("p", "pod", "Manage pods")
-def _(args: cli.Args):
+def _():
     pass
 
 
@@ -125,22 +151,22 @@ def tryDecode(data: Optional[bytes], default: str = "") -> str:
 
 
 @cli.command("c", "pod/create", "Create a new pod")
-def _(args: cli.Args):
+def _(args: PodCreateArgs):
     """
     Create a new development pod with cutekit installed and the current
     project mounted at /project
     """
     project = model.Project.ensure()
 
-    name = str(args.consumeOpt("name", defaultPodName))
+    name = args.name
     if not name.startswith(podPrefix):
         name = f"{podPrefix}{name}"
-    image = IMAGES[str(args.consumeOpt("image", defaultPodImage))]
+    image = IMAGES[args.image]
 
     client = docker.from_env()
     try:
         existing = client.containers.get(name)
-        if cli.ask(f"Pod '{name[len(podPrefix):]}' already exists, kill it?", False):
+        if vt100.ask(f"Pod '{name[len(podPrefix):]}' already exists, kill it?", False):
             existing.stop()
             existing.remove()
         else:
@@ -177,10 +203,12 @@ def _(args: cli.Args):
 
 
 @cli.command("k", "pod/kill", "Stop and remove a pod")
-def _(args: cli.Args):
+def _(args: PodKillArgs):
     client = docker.from_env()
-    name = str(args.consumeOpt("name", defaultPodName))
-    all = args.consumeOpt("all", False) is True
+
+    name = args.name
+    all = args.all
+
     if not name.startswith(podPrefix):
         name = f"{podPrefix}{name}"
 
@@ -191,25 +219,19 @@ def _(args: cli.Args):
                     continue
                 container.stop()
                 container.remove()
-                print(f"Pod '{container.name[len(podPrefix) :]}' killed")
+                print(f"Pod '{args.name}' killed")
             return
 
         container = client.containers.get(name)
         container.stop()
         container.remove()
-        print(f"Pod '{name[len(podPrefix) :]}' killed")
+        print(f"Pod '{args.name}' killed")
     except docker.errors.NotFound:
-        raise RuntimeError(f"Pod '{name[len(podPrefix):]}' does not exist")
-
-
-@cli.command("s", "pod/shell", "Open a shell in a pod")
-def _(args: cli.Args):
-    args.args.insert(0, "/bin/bash")
-    podExecCmd(args)
+        raise RuntimeError(f"Pod '{args.name}' does not exist")
 
 
 @cli.command("l", "pod/list", "List all pods")
-def _(args: cli.Args):
+def _():
     client = docker.from_env()
     hasPods = False
     for container in client.containers.list(all=True):
@@ -223,16 +245,13 @@ def _(args: cli.Args):
 
 
 @cli.command("e", "pod/exec", "Execute a command in a pod")
-def podExecCmd(args: cli.Args):
-    name = str(args.consumeOpt("name", defaultPodName))
+def podExecCmd(args: PodExecArgs):
+    name = args.name
+
     if not name.startswith(podPrefix):
         name = f"{podPrefix}{name}"
 
-    cmd = args.consumeArg()
-    if cmd is None:
-        raise RuntimeError("Missing command to execute")
-
     try:
-        shell.exec("docker", "exec", "-it", name, cmd, *args.extra)
+        shell.exec("docker", "exec", "-it", name, args.cmd, *args.args)
     except Exception:
-        raise RuntimeError(f"Pod '{name[len(podPrefix):]}' does not exist")
+        raise RuntimeError(f"Pod '{args.name}' does not exist")
diff --git a/cutekit/requirements.txt b/cutekit/requirements.txt
index 892a2bf..46604ce 100644
--- a/cutekit/requirements.txt
+++ b/cutekit/requirements.txt
@@ -2,3 +2,4 @@ requests ~= 2.31.0
 graphviz ~= 0.20.1
 dataclasses-json ~= 0.6.2
 docker ~= 6.1.3
+asserts ~= 0.12.0
diff --git a/cutekit/shell.py b/cutekit/shell.py
index 239019f..82a38e7 100644
--- a/cutekit/shell.py
+++ b/cutekit/shell.py
@@ -14,7 +14,7 @@ import dataclasses as dt
 
 from pathlib import Path
 from typing import Literal, Optional
-from . import const, cli
+from . import cli, const
 
 _logger = logging.getLogger(__name__)
 
@@ -426,28 +426,53 @@ def compress(path: str, dest: Optional[str] = None, format: str = "zstd") -> str
 # --- Commands --------------------------------------------------------------- #
 
 
-@cli.command("s", "scripts", "Manage scripts")
-def _(args: cli.Args):
+@cli.command("s", "shell", "Shell like commands")
+def _():
     pass
 
 
-@cli.command("d", "debug", "Debug a program")
-def _(args: cli.Args):
-    wait = args.consumeOpt("wait", False) is True
-    debugger = args.consumeOpt("debugger", "lldb")
-    command = [str(args.consumeArg()), *args.extra]
-    debug(command, debugger=str(debugger), wait=wait)
+class CommandArgs:
+    cmd: str = cli.operand("command", "The command to debug")
+    args: list[str] = cli.extra("args", "The arguments to pass to the command")
+
+    def fullCmd(self) -> list[str]:
+        return [self.cmd, *self.args]
 
 
-@cli.command("p", "profile", "Profile a program")
-def _(args: cli.Args):
-    command = [str(args.consumeArg()), *args.extra]
-    profile(command)
+class DebugArgs:
+    wait: bool = cli.arg(None, "wait", "Wait for the debugger to attach")
+    debbuger: str = cli.arg(None, "debugger", "The debugger to use", default="lldb")
 
 
-@cli.command("c", "compress", "Compress a file or directory")
-def _(args: cli.Args):
-    path = str(args.consumeArg())
-    dest = args.consumeOpt("dest", None)
-    format = args.consumeOpt("format", "zstd")
-    compress(path, dest, format)
+class _DebugArgs(DebugArgs, CommandArgs):
+    pass
+
+
+@cli.command("d", "shell/debug", "Debug a program")
+def _(args: _DebugArgs):
+    debug(args.fullCmd(), debugger=str(args.debugger), wait=args.wait)
+
+
+class ProfileArgs:
+    rate: int = cli.arg(None, "rate", "The sampling rate", default=1000)
+    what: str = cli.arg(None, "what", "What to profile (cpu or mem)", default="cpu")
+
+
+class _ProfileArgs(ProfileArgs, CommandArgs):
+    pass
+
+
+@cli.command("p", "shell/profile", "Profile a program")
+def _(args: _ProfileArgs):
+    profile(args.fullCmd(), rate=args.rate, what=args.what)
+
+
+class CompresseArgs:
+    format: str = cli.arg(None, "format", "The compression format", default="zstd")
+    dest: Optional[str] = cli.arg(None, "dest", "The destination file or directory")
+    path: str = cli.operand("path", "The file or directory to compress")
+
+
+@cli.command("c", "shell/compress", "Compress a file or directory")
+def _(args: CompresseArgs):
+    compress(args.path, dest=args.dest, format=args.format)
diff --git a/cutekit/vt100.py b/cutekit/vt100.py
index 96c7eea..0ce993e 100644
--- a/cutekit/vt100.py
+++ b/cutekit/vt100.py
@@ -1,3 +1,7 @@
+import sys
+from typing import Optional
+
+
 BLACK = "\033[30m"
 RED = "\033[31m"
 GREEN = "\033[32m"
@@ -48,8 +52,38 @@ def indent(text: str, indent: int = 4) -> str:
 
 
 def title(text: str):
-    print(f"{BOLD}{text}{RESET}:")
+    print(f"{BOLD+WHITE+UNDERLINE}{text}{RESET}")
+
+
+def subtitle(text: str):
+    print(f"{BOLD+WHITE}{text}{RESET}:")
 
 
 def p(text: str):
     return indent(wordwrap(text))
+
+
+def error(msg: str) -> None:
+    print(f"{RED}Error:{RESET} {msg}\n", file=sys.stderr)
+
+
+def warning(msg: str) -> None:
+    print(f"{YELLOW}Warning:{RESET} {msg}\n", file=sys.stderr)
+
+
+def ask(msg: str, default: Optional[bool] = None) -> bool:
+    if default is None:
+        msg = f"{msg} [y/n] "
+    elif default:
+        msg = f"{msg} [Y/n] "
+    else:
+        msg = f"{msg} [y/N] "
+
+    while True:
+        result = input(msg).lower()
+        if result in ("y", "yes"):
+            return True
+        elif result in ("n", "no"):
+            return False
+        elif result == "" and default is not None:
+            return default
diff --git a/doc/extends.md b/doc/extends.md
index 0075e5f..910f6b0 100644
--- a/doc/extends.md
+++ b/doc/extends.md
@@ -11,6 +11,6 @@ For example you can add a new command to the CLI:
 from cutekit import cli
 
 @cli.command("h", "hello", "Print hello world")
-def _(args: cli.Args) -> None:
+def _() -> None:
     print("Hello world!")
 ```
diff --git a/tests/test_cli.py b/tests/test_cli.py
new file mode 100644
index 0000000..92769e3
--- /dev/null
+++ b/tests/test_cli.py
@@ -0,0 +1,239 @@
+from cutekit import cli, utils
+from asserts import (
+    assert_is,
+    assert_true,
+    assert_equal,
+    assert_raises,
+    assert_is_instance,
+)
+
+# --- Parse Values ----------------------------------------------------------- #
+
+
+def test_parse_int_val():
+    assert_equal(cli.parseValue("1"), 1)
+    assert_equal(cli.parseValue("2"), 2)
+    assert_equal(cli.parseValue("+2"), +2)
+    assert_equal(cli.parseValue("-2"), -2)
+
+
+def test_parse_true_val():
+    assert_equal(cli.parseValue("true"), True)
+    assert_equal(cli.parseValue("True"), True)
+    assert_equal(cli.parseValue("y"), True)
+    assert_equal(cli.parseValue("yes"), True)
+    assert_equal(cli.parseValue("Y"), True)
+    assert_equal(cli.parseValue("Yes"), True)
+
+
+def test_parse_false_val():
+    assert_equal(cli.parseValue("false"), False)
+    assert_equal(cli.parseValue("False"), False)
+    assert_equal(cli.parseValue("n"), False)
+    assert_equal(cli.parseValue("no"), False)
+    assert_equal(cli.parseValue("N"), False)
+    assert_equal(cli.parseValue("No"), False)
+
+
+def test_parse_str_val():
+    assert_equal(cli.parseValue("foo"), "foo")
+    assert_equal(cli.parseValue("'foo'"), "foo")
+    assert_equal(cli.parseValue('"foo"'), "foo")
+
+
+def test_parse_list_val():
+    assert_equal(cli.parseValue("foo,bar"), ["foo", "bar"])
+    assert_equal(cli.parseValue("'foo','bar'"), ["foo", "bar"])
+    assert_equal(cli.parseValue('"foo","bar"'), ["foo", "bar"])
+
+
+# --- Parse Args ------------------------------------------------------------- #
+
+
+def test_parse_short_arg():
+    args = cli.parseArg("-a")
+    assert_equal(len(args), 1)
+    arg = args[0]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "a")
+    assert_equal(arg.value, True)
+
+
+def test_parse_short_args():
+    args = cli.parseArg("-abc")
+    assert_equal(len(args), 3)
+    arg = args[0]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "a")
+    assert_equal(arg.value, True)
+
+    arg = args[1]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "b")
+    assert_equal(arg.value, True)
+
+    arg = args[2]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "c")
+    assert_equal(arg.value, True)
+
+
+def test_parse_long_arg():
+    args = cli.parseArg("--foo")
+    assert_equal(len(args), 1)
+    arg = args[0]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "foo")
+    assert_equal(arg.value, True)
+
+
+def test_parse_long_arg_with_value():
+    args = cli.parseArg("--foo=bar")
+    assert_equal(len(args), 1)
+    arg = args[0]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "foo")
+    assert_equal(arg.value, "bar")
+
+
+def test_parse_long_arg_with_value_list():
+    args = cli.parseArg("--foo=bar,baz")
+    assert_equal(len(args), 1)
+    arg = args[0]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "foo")
+    assert_equal(arg.value, ["bar", "baz"])
+
+
+def test_parse_key_subkey_arg():
+    args = cli.parseArg("--foo:bar")
+    assert_equal(len(args), 1)
+    arg = args[0]
+    assert_is_instance(arg, cli.ArgumentToken)
+    assert_equal(arg.key, "foo")
+    assert_equal(arg.subkey, "bar")
+    assert_equal(arg.value, True)
+
+
+def extractParse(type: type[utils.T], args: list[str]) -> utils.T:
+    schema = cli.Schema.extract(type)
+    return schema.parse(args)
+
+
+class IntArg:
+    value: int = cli.arg(None, "value")
+
+
+def test_cli_arg_int():
+
+    assert_equal(extractParse(IntArg, ["--value=-1"]).value, -1)
+    assert_equal(extractParse(IntArg, ["--value=0"]).value, 0)
+    assert_equal(extractParse(IntArg, ["--value=1"]).value, 1)
+
+
+class StrArg:
+    value: str = cli.arg(None, "value")
+
+
+def test_cli_arg_str1():
+    assert_equal(extractParse(StrArg, ["--value=foo"]).value, "foo")
+    assert_equal(extractParse(StrArg, ["--value='foo, bar'"]).value, "foo, bar")
+
+
+class BoolArg:
+    value: bool = cli.arg(None, "value")
+
+
+def test_cli_arg_bool():
+    assert_is(extractParse(BoolArg, ["--value"]).value, True)
+
+    assert_is(extractParse(BoolArg, ["--value=true"]).value, True)
+    assert_is(extractParse(BoolArg, ["--value=True"]).value, True)
+    assert_is(extractParse(BoolArg, ["--value=y"]).value, True)
+    assert_is(extractParse(BoolArg, ["--value=yes"]).value, True)
+    assert_is(extractParse(BoolArg, ["--value=Y"]).value, True)
+    assert_is(extractParse(BoolArg, ["--value=Yes"]).value, True)
+    assert_is(extractParse(BoolArg, ["--value=1"]).value, True)
+
+    assert_is(extractParse(BoolArg, ["--value=false"]).value, False)
+    assert_is(extractParse(BoolArg, ["--value=False"]).value, False)
+    assert_is(extractParse(BoolArg, ["--value=n"]).value, False)
+    assert_is(extractParse(BoolArg, ["--value=no"]).value, False)
+    assert_is(extractParse(BoolArg, ["--value=N"]).value, False)
+    assert_is(extractParse(BoolArg, ["--value=No"]).value, False)
+    assert_is(extractParse(BoolArg, ["--value=0"]).value, False)
+
+
+class IntListArg:
+    value: list[int] = cli.arg(None, "value")
+
+
+def test_cli_arg_list_int1():
+    assert_equal(extractParse(IntListArg, []).value, [])
+    assert_equal(extractParse(IntListArg, ["--value=1", "--value=2"]).value, [1, 2])
+    assert_equal(extractParse(IntListArg, ["--value=1,2"]).value, [1, 2])
+
+
+class StrListArg:
+    value: list[str] = cli.arg(None, "value")
+
+
+def test_cli_arg_list_str():
+    assert_equal(extractParse(StrListArg, []).value, [])
+
+    assert_equal(
+        extractParse(StrListArg, ["--value=foo", "--value=bar"]).value,
+        [
+            "foo",
+            "bar",
+        ],
+    )
+
+    assert_equal(extractParse(StrListArg, ["--value=foo,bar"]).value, ["foo", "bar"])
+    assert_equal(extractParse(StrListArg, ["--value=foo,bar"]).value, ["foo", "bar"])
+    assert_equal(extractParse(StrListArg, ["--value='foo,bar'"]).value, ["foo,bar"])
+    assert_equal(extractParse(StrListArg, ["--value='foo, bar'"]).value, ["foo, bar"])
+    assert_equal(extractParse(StrListArg, ['--value="foo, bar"']).value, ["foo, bar"])
+
+
+class StrDictArg:
+    value: dict[str, str] = cli.arg(None, "value")
+
+
+def test_cli_arg_dict_str():
+    assert_equal(extractParse(StrDictArg, ["--value:foo=bar"]).value, {"foo": "bar"})
+    assert_equal(
+        extractParse(StrDictArg, ["--value:foo=bar", "--value:baz=qux"]).value,
+        {
+            "foo": "bar",
+            "baz": "qux",
+        },
+    )
+
+
+class StrOptArg:
+    value: str | None = cli.arg(None, "value")
+
+
+def test_cli_arg_str_opt():
+    assert_equal(extractParse(StrOptArg, []).value, None)
+    assert_equal(extractParse(StrOptArg, ["--value=foo"]).value, "foo")
+
+
+class FooArg:
+    foo: str = cli.arg(None, "foo")
+
+
+class BazArg:
+    baz: str = cli.arg(None, "baz")
+
+
+class BarArg(FooArg, BazArg):
+    bar: str = cli.arg(None, "bar")
+
+
+def test_cli_arg_inheritance():
+    res = extractParse(BarArg, ["--foo=foo", "--bar=bar", "--baz=baz"])
+    assert_equal(res.foo, "foo")
+    assert_equal(res.bar, "bar")
+    assert_equal(res.baz, "baz")