feat: js/py generate declarations from comments (#30)

14 files changed, 717 insertions, 272 deletions

diff --git a/Argcfile.sh b/Argcfile.sh
index 8b0317d..382cd88 100644
--- a/Argcfile.sh
+++ b/Argcfile.sh
@@ -22,26 +22,32 @@ call() {
 }
 
 # @cmd Build the project
-# @option --names-file=functions.txt Path to a file containing function filenames, one per line.
+# @option --names-file=functions.txt Path to a file containing tool filenames, one per line.
+# @option --declarations-file=functions.json <FILE> Path to a json file to save function declarations
 # This file specifies which function files to build. 
 # Example:
 #   get_current_weather.sh
 #   may_execute_js_code.js
 build() {
-    argc build-declarations-json --names-file "${argc_names_file}"
+    argc build-declarations-json --names-file "${argc_names_file}" --declarations-file "${argc_declarations_file}"
     argc build-bin --names-file "${argc_names_file}"
 }
 
-# @cmd Build bin dir 
-# @option --names-file=functions.txt Path to a file containing function filenames, one per line.
+# @cmd Build tool binaries
+# @option --names-file=functions.txt Path to a file containing tool filenames, one per line.
+# @arg tools*[`_choice_tool`] The tool filenames
 build-bin() {
-    if [[ ! -f "$argc_names_file" ]]; then
-        _die "no found "$argc_names_file""
+    if [[ "${#argc_tools[@]}" -gt 0 ]]; then
+        names=("${argc_tools[@]}" )
+    elif [[ -f "$argc_names_file" ]]; then
+        names=($(cat "$argc_names_file"))
+    fi
+    if [[ -z "$names" ]]; then
+        _die "error: no tools selected"
     fi
     mkdir -p "$BIN_DIR"
     rm -rf "$BIN_DIR"/*
-    names=($(cat "$argc_names_file"))
-    not_found_funcs=()
+    not_found_tools=()
     for name in "${names[@]}"; do
         basename="${name%.*}"
         lang="${name##*.}"
@@ -52,14 +58,14 @@ build-bin() {
                 _build_win_shim $lang > "$bin_file"
             else
                 bin_file="$BIN_DIR/$basename" 
-                ln -s "$PWD/scripts/run-tool.$lang" "$bin_file"
+                ln -s -f "$PWD/scripts/run-tool.$lang" "$bin_file"
             fi
         else
-            not_found_funcs+=("$name")
+            not_found_tools+=("$name")
         fi
     done
-    if [[ -n "$not_found_funcs" ]]; then
-        _die "error: not founds functions: ${not_found_funcs[*]}"
+    if [[ -n "$not_found_tools" ]]; then
+        _die "error: not found tools: ${not_found_tools[*]}"
     fi
     for name in "$BIN_DIR"/*; do
         echo "Build $name"
@@ -67,73 +73,71 @@ build-bin() {
 }
 
 # @cmd Build declarations.json
-# @option --output=functions.json <FILE> Path to a json file to save function declarations
-# @option --names-file=functions.txt Path to a file containing function filenames, one per line.
-# @arg funcs*[`_choice_func`] The function filenames
+# @option --names-file=functions.txt Path to a file containing tool filenames, one per line.
+# @option --declarations-file=functions.json <FILE> Path to a json file to save function declarations
+# @arg tools*[`_choice_tool`] The tool filenames
 build-declarations-json() {
-    if [[ "${#argc_funcs[@]}" -gt 0 ]]; then
-        names=("${argc_funcs[@]}" )
+    if [[ "${#argc_tools[@]}" -gt 0 ]]; then
+        names=("${argc_tools[@]}" )
     elif [[ -f "$argc_names_file" ]]; then
         names=($(cat "$argc_names_file"))
     fi
     if [[ -z "$names" ]]; then
-        _die "error: no function for building declarations.json"
+        _die "error: no tools selected"
     fi
     json_list=()
-    not_found_funcs=()
-    build_failed_funcs=()
+    not_found_tools=()
+    build_failed_tools=()
     for name in "${names[@]}"; do
         lang="${name##*.}"
         func_file="tools/$name"
         if [[ ! -f "$func_file" ]]; then
-            not_found_funcs+=("$name")
+            not_found_tools+=("$name")
             continue;
         fi
-        json_data="$("build-single-declaration" "$name")" || {
-            build_failed_funcs+=("$name")
+        json_data="$(build-tool-declaration "$name")" || {
+            build_failed_tools+=("$name")
         }
         json_list+=("$json_data")
     done
-    if [[ -n "$not_found_funcs" ]]; then
-        _die "error: not found functions: ${not_found_funcs[*]}"
+    if [[ -n "$not_found_tools" ]]; then
+        _die "error: not found tools: ${not_found_tools[*]}"
     fi
-    if [[ -n "$build_failed_funcs" ]]; then
-        _die "error: invalid functions: ${build_failed_funcs[*]}"
+    if [[ -n "$build_failed_tools" ]]; then
+        _die "error: invalid tools: ${build_failed_tools[*]}"
     fi
-    echo "Build $argc_output"
-    echo "["$(IFS=,; echo "${json_list[*]}")"]"  | jq '.' > "$argc_output"
+    echo "Build $argc_declarations_file"
+    echo "["$(IFS=,; echo "${json_list[*]}")"]"  | jq '.' > "$argc_declarations_file"
 }
 
 
-# @cmd Build single declaration
-# @arg func![`_choice_func`] The function name
-build-single-declaration() {
-    func="$1"
-    lang="${func##*.}"
+# @cmd Build function declaration for a tool
+# @arg tool![`_choice_tool`] The function name
+build-tool-declaration() {
+    lang="${1##*.}"
     cmd="$(_lang_to_cmd "$lang")"
-    LLM_FUNCTION_ACTION=declarate "$cmd" "scripts/run-tool.$lang" "$func"
+    "$cmd" "scripts/build-declarations.$lang" "tools/$1" | jq '.[0]'
 }
 
-# @cmd List functions that can be put into functions.txt
+# @cmd List tools that can be put into functions.txt
 # Examples:
-#      argc --list-functions > functions.txt
-#      argc --list-functions search_duckduckgo.sh >> functions.txt
-# @arg funcs*[`_choice_func`] The function filenames, list all available functions if not provided
-list-functions() {
-    _choice_func
+#      argc list-tools > functions.txt
+list-tools() {
+    _choice_tool
 }
 
 # @cmd Test the project
 test() {
-    func_names_file=functions.txt.test
-    argc list-functions > "$func_names_file"
-    argc build --names-file "$func_names_file"
-    argc test-functions
-    rm -rf "$func_names_file"
+    mkdir -p tmp/tests
+    names_file=tmp/tests/functions.txt
+    declarations_file=tmp/tests/functions.json
+    argc list-tools > "$names_file"
+    argc build --names-file "$names_file" --declarations-file "$declarations_file"
+    argc test-tools
 }
 
 # @cmd Test call functions
-test-functions() {
+test-tools() {
     if _is_win; then
         ext=".cmd"
     fi
@@ -172,7 +176,7 @@ install() {
     fi
 }
 
-# @cmd Create a boilplate tool script file.
+# @cmd Create a boilplate tool scriptfile.
 # @arg args~
 create() {
     ./scripts/create-tool.sh "$@"
@@ -239,7 +243,7 @@ _is_win() {
     fi
 }
 
-_choice_func() {
+_choice_tool() {
     for item in "${LANG_CMDS[@]}"; do
         lang="${item%:*}"
         cmd="${item#*:}"
diff --git a/README.md b/README.md
index 435e005..acdd681 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,9 @@ AIChat will ask permission before running the function.
 
 ## Writing Your Own Functions
 
-The project supports write functions in bash/js/python.
+You can write functions in bash/javascript/python.
+
+`llm-functions` will automatic generate function declarations from comments. Refer to `demo_tool.{sh,js,py}` for examples of how to use comments for autogeneration of declarations.
 
 ### Bash
 
@@ -92,47 +94,19 @@ main() {
 eval "$(argc --argc-eval "$0" "$@")"
 ```
 
-`llm-functions` will automatic generate function declaration.json from [comment tags](https://github.com/sigoden/argc?tab=readme-ov-file#comment-tags).
-
-The relationship between comment tags and parameters in function declarations is as follows:
-
-```sh
-# @flag --boolean                   Parameter `{"type": "boolean"}`
-# @option --string                  Parameter `{"type": "string"}`
-# @option --string-enum[foo|bar]    Parameter `{"type": "string", "enum": ["foo", "bar"]}`
-# @option --integer <INT>           Parameter `{"type": "integer"}`
-# @option --number <NUM>            Parameter `{"type": "number"}`
-# @option --array* <VALUE>          Parameter `{"type": "array", "items": {"type":"string"}}`
-# @option --scalar-required!        Use `!` to mark a scalar parameter as required.
-# @option --array-required+         Use `+` to mark a array parameter as required
-```
-
 ### Javascript
 
 Create a new javascript in the [./tools/](./tools/) directory (.e.g. `may_execute_js_code.js`).
 
 ```js
-exports.declarate = function declarate() {
-  return {
-    "name": "may_execute_js_code",
-    "description": "Runs the javascript code in node.js.",
-    "parameters": {
-      "type": "object",
-      "properties": {
-        "code": {
-          "type": "string",
-          "description": "Javascript code to execute, such as `console.log(\"hello world\")`"
-        }
-      },
-      "required": [
-        "code"
-      ]
-    }
-  }
-}
-
-exports.execute = function execute(data) {
-  eval(data.code)
+/**
+ * Runs the javascript code in node.js.
+ * @typedef {Object} Args
+ * @property {string} code - Javascript code to execute, such as `console.log("hello world")`
+ * @param {Args} args
+ */
+exports.main = function main({ code }) {
+  eval(code);
 }
 
 ```
@@ -142,27 +116,13 @@ exports.execute = function execute(data) {
 Create a new python script in the [./tools/](./tools/) directory (e.g., `may_execute_py_code.py`).
 
 ```py
-def declarate():
-  return {
-    "name": "may_execute_py_code",
-    "description": "Runs the python code.",
-    "parameters": {
-      "type": "object",
-      "properties": {
-        "code": {
-          "type": "string",
-          "description": "python code to execute, such as `print(\"hello world\")`"
-        }
-      },
-      "required": [
-        "code"
-      ]
-    }
-  }
-
-
-def execute(data):
-  exec(data["code"])
+def main(code: str):
+    """Runs the python code.
+    Args:
+        code: Python code to execute, such as `print("hello world")`
+    """
+    exec(code)
+
 ```
 
 ## License
diff --git a/scripts/build-declarations.js b/scripts/build-declarations.js
new file mode 100644
index 0000000..e1a2892
--- /dev/null
+++ b/scripts/build-declarations.js
@@ -0,0 +1,203 @@
+#!/usr/bin/env node
+
+const fs = require("fs");
+
+function main() {
+  const scriptfile = process.argv[2];
+  const contents = fs.readFileSync(process.argv[2], "utf8");
+  const functions = extractFunctions(contents);
+  let declarations = functions.map(({ funcName, jsdoc }) => {
+    const { description, params } = parseJsDoc(jsdoc, funcName);
+    const declaration = buildDeclaration(funcName, description, params);
+    return declaration;
+  });
+  const name = getBasename(scriptfile);
+  if (declarations.length > 0) {
+    declarations = declarations.slice(0, 1);
+    declarations[0].name = name;
+  }
+  console.log(JSON.stringify(declarations, null, 2));
+}
+
+/**
+ * @param {string} contents
+ * @param {bool} isTool
+ */
+function extractFunctions(contents, isTool = true) {
+  const output = [];
+  const lines = contents.split("\n");
+  let isInComment = false;
+  let jsdoc = "";
+  let incompleteComment = "";
+  for (let line of lines) {
+    if (/^\s*\/\*/.test(line)) {
+      isInComment = true;
+      incompleteComment += `\n${line}`;
+    } else if (/^\s*\*\//.test(line)) {
+      isInComment = false;
+      incompleteComment += `\n${line}`;
+      jsdoc = incompleteComment;
+      incompleteComment = "";
+    } else if (isInComment) {
+      incompleteComment += `\n${line}`;
+    } else {
+      if (!jsdoc || line.trim() === "") {
+        continue;
+      }
+      if (isTool) {
+        if (/function main/.test(line)) {
+          output.push({
+            funcName: "main",
+            jsdoc,
+          });
+        }
+      } else {
+        const match = /function *([_A-Za-z]+)/.exec(line);
+        if (match) {
+          const funcName = match[1];
+          if (!funcName.startsWith("_")) {
+            output.push({ funcName, jsdoc });
+          }
+        }
+      }
+      jsdoc = "";
+    }
+  }
+  return output;
+}
+
+/**
+ * @param {string} jsdoc
+ * @param {string} funcName,
+ */
+function parseJsDoc(jsdoc, funcName) {
+  const lines = jsdoc.split("\n");
+  let description = "";
+  const rawParams = [];
+  let tag = "";
+  for (let line of lines) {
+    line = line.replace(/^\s*(\/\*\*|\*\/|\*)/, "").trim();
+    let match = /^@(\w+)/.exec(line);
+    if (match) {
+      tag = match[1];
+    }
+    if (!tag) {
+      description += `\n${line}`;
+    } else if (tag == "property") {
+      if (match) {
+        rawParams.push(line.slice(tag.length + 1).trim());
+      } else {
+        rawParams[rawParams.length - 1] += `\n${line}`;
+      }
+    }
+  }
+  const params = [];
+  for (const rawParam of rawParams) {
+    try {
+      params.push(parseParam(rawParam));
+    } catch (err) {
+      throw new Error(
+        `Unable to parse function '${funcName}' of jsdoc '@property ${rawParam}'`,
+      );
+    }
+  }
+  return {
+    description: description.trim(),
+    params,
+  };
+}
+
+/**
+ * @typedef {ReturnType<parseParam>} Param
+ */
+
+/**
+ * @param {string} rawParam
+ */
+function parseParam(rawParam) {
+  const regex = /^{([^}]+)} +(\S+)( *- +| +)?/;
+  const match = regex.exec(rawParam);
+  if (!match) {
+    throw new Error(`Invalid jsdoc comment`);
+  }
+  const type = match[1];
+  let name = match[2];
+  const description = rawParam.replace(regex, "");
+
+  let required = true;
+  if (/^\[.*\]$/.test(name)) {
+    name = name.slice(1, -1);
+    required = false;
+  }
+  let property = buildProperty(type, description);
+  return { name, property, required };
+}
+
+/**
+ * @param {string} type
+ * @param {string} description
+ */
+function buildProperty(type, description) {
+  type = type.toLowerCase();
+  const property = {};
+  if (type.includes("|")) {
+    property.type = "string";
+    property.enum = type.replace(/'/g, "").split("|");
+  } else if (type === "boolean") {
+    property.type = "boolean";
+  } else if (type === "string") {
+    property.type = "string";
+  } else if (type === "integer") {
+    property.type = "integer";
+  } else if (type === "number") {
+    property.type = "number";
+  } else if (type === "string[]") {
+    property.type = "array";
+    property.items = { type: "string" };
+  } else {
+    throw new Error(`Unsupported type '${type}'`);
+  }
+  property.description = description;
+  return property;
+}
+
+/**
+ * @param {string} filePath
+ */
+function getBasename(filePath) {
+  const filenameWithExt = filePath.split(/[/\\]/).pop();
+
+  const lastDotIndex = filenameWithExt.lastIndexOf(".");
+
+  if (lastDotIndex === -1) {
+    return filenameWithExt;
+  }
+
+  return filenameWithExt.substring(0, lastDotIndex);
+}
+
+/**
+ * @param {string} name
+ * @param {string} description
+ * @param {Param[]} params
+ */
+function buildDeclaration(name, description, params) {
+  const schema = {
+    name,
+    description,
+    properties: {},
+  };
+  const requiredParams = [];
+  for (const { name, property, required } of params) {
+    schema.properties[name] = property;
+    if (required) {
+      requiredParams.push(name);
+    }
+  }
+  if (requiredParams.length > 0) {
+    schema.required = requiredParams;
+  }
+  return schema;
+}
+
+main();
diff --git a/scripts/build-declarations.py b/scripts/build-declarations.py
new file mode 100644
index 0000000..17a27b6
--- /dev/null
+++ b/scripts/build-declarations.py
@@ -0,0 +1,177 @@
+#!/usr/bin/env python
+
+import ast
+import os
+import json
+import re
+import sys
+from collections import OrderedDict
+
+
+def main():
+    scriptfile = sys.argv[1]
+    with open(scriptfile, "r", encoding="utf-8") as f:
+        contents = f.read()
+
+    functions = extract_functions(contents)
+    declarations = []
+    for function in functions:
+        func_name, docstring, func_args = function
+        description, params = parse_docstring(docstring)
+        declarations.append(
+            build_declaration(func_name, description, params, func_args)
+        )
+
+    name = os.path.splitext(os.path.basename(scriptfile))[0]
+    if declarations:
+        declarations = declarations[0:1]
+        declarations[0]["name"] = name
+
+    print(json.dumps(declarations, indent=2))
+
+
+def extract_functions(contents: str):
+    tree = ast.parse(contents)
+    output = []
+    for node in ast.walk(tree):
+        if not isinstance(node, ast.FunctionDef):
+            continue
+        func_name = node.name
+        if func_name.startswith("_"):
+            continue
+        docstring = ast.get_docstring(node) or ""
+        func_args = OrderedDict()
+        for arg in node.args.args:
+            arg_name = arg.arg
+            arg_type = get_arg_type(arg.annotation)
+            func_args[arg_name] = arg_type
+        output.append((func_name, docstring, func_args))
+    return output
+
+
+def get_arg_type(annotation) -> str:
+    if annotation is None:
+        return ""
+    elif isinstance(annotation, ast.Name):
+        return annotation.id
+    elif isinstance(annotation, ast.Subscript):
+        if isinstance(annotation.value, ast.Name):
+            type_name = annotation.value.id
+            if type_name == "List":
+                child = get_arg_type(annotation.slice)
+                return f"list[{child}]"
+            if type_name == "Literal":
+                literals = [ast.unparse(el) for el in annotation.slice.elts]
+                return f"{'|'.join(literals)}"
+            if type_name == "Optional":
+                child = get_arg_type(annotation.slice)
+                return f"{child}?"
+    return "any"
+
+
+def parse_docstring(docstring: str):
+    lines = docstring.splitlines()
+    description = ""
+    rawParams = []
+    is_in_args = False
+    for line in lines:
+        if not is_in_args:
+            if line.startswith("Args:"):
+                is_in_args = True
+            else:
+                description += f"\n{line}"
+            continue
+        else:
+            if re.search(r"^\s+", line):
+                rawParams.append(line.strip())
+            else:
+                break
+    params = {}
+    for rawParam in rawParams:
+        name, type_, description = parse_param(rawParam)
+        params[name] = (type_, description)
+    return (description.strip(), params)
+
+
+def parse_param(raw_param: str):
+    name = ""
+    description = ""
+    type_from_comment = ""
+    if ":" in raw_param:
+        name, description = raw_param.split(":", 1)
+        name = name.strip()
+        description = description.strip()
+    else:
+        name = raw_param
+    if " " in name:
+        name, type_from_comment = name.split(" ", 1)
+        type_from_comment = type_from_comment.strip()
+
+    if type_from_comment.startswith("(") and type_from_comment.endswith(")"):
+        type_from_comment = type_from_comment[1:-1]
+    type_parts = [value.strip() for value in type_from_comment.split(",")]
+    type_ = type_parts[0]
+    if "optional" in type_parts[1:]:
+        type_ = f"{type_}?"
+
+    return (name, type_, description)
+
+
+def build_declaration(
+    name: str, description: str, params: dict, args: OrderedDict[str, str]
+) -> dict[str, dict]:
+    schema = {
+        "name": name,
+        "description": description,
+        "properties": {},
+    }
+    required_params = []
+    for arg_name, arg_type in args.items():
+        type_ = arg_type
+        description = ""
+        required = True
+        if params.get(arg_name):
+            param_type, description = params[arg_name]
+            if not type_:
+                type_ = param_type
+        if type_.endswith("?"):
+            type_ = type_[:-1]
+            required = False
+        try:
+            property = build_property(type_, description)
+        except:
+            raise ValueError(f"Unable to parse arg '{arg_name}' of function '{name}'")
+        schema["properties"][arg_name] = property
+        if required:
+            required_params.append(arg_name)
+    if required_params:
+        schema["required"] = required_params
+    return schema
+
+
+def build_property(type_: str, description: str):
+    property = {}
+    if "|" in type_:
+        property["type"] = "string"
+        property["enum"] = type_.replace("'", "").split("|")
+    elif type_ == "bool":
+        property["type"] = "boolean"
+    elif type_ == "str":
+        property["type"] = "string"
+    elif type_ == "int":
+        property["type"] = "integer"
+    elif type_ == "float":
+        property["type"] = "number"
+    elif type_ == "list[str]":
+        property["type"] = "array"
+        property["items"] = {"type": "string"}
+    elif type_ == "":
+        property["type"] = "string"
+    else:
+        raise ValueError(f"Unsupported type `{type_}`")
+    property["description"] = description
+    return property
+
+
+if __name__ == "__main__":
+    main()
diff --git a/scripts/build-declarations.sh b/scripts/build-declarations.sh
new file mode 100755
index 0000000..1f5786a
--- /dev/null
+++ b/scripts/build-declarations.sh
@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+argc --argc-export "$1" | \
+jq -r '
+    def parse_description(flag_option):
+        if flag_option.describe == "" then
+            {}
+        else
+            { "description": flag_option.describe }
+        end;
+
+    def parse_enum(flag_option):
+        if flag_option.choice.type == "Values" then
+            { "enum": flag_option.choice.data }
+        else
+            {}
+        end;
+
+    def parse_property(flag_option):
+        [
+            { condition: (flag_option.flag == true), result: { type: "boolean" } },
+            { condition: (flag_option.multiple_occurs == true), result: { type: "array", items: { type: "string" } } },
+            { condition: (flag_option.notations[0] == "INT"), result: { type: "integer" } },
+            { condition: (flag_option.notations[0] == "NUM"), result: { type: "number" } },
+            { condition: true, result: { type: "string" } } ]
+        | map(select(.condition) | .result) | first 
+        | (. + parse_description(flag_option))
+        | (. + parse_enum(flag_option))
+        ;
+
+
+    def parse_parameter(flag_options):
+        {
+            type: "object",
+            properties: (reduce flag_options[] as $item ({}; . + { ($item.id | sub("-"; "_"; "g")): parse_property($item) })),
+            required: [flag_options[] | select(.required == true) | .id | sub("-"; "_"; "g")],
+        };
+
+    [{
+        name: (.name | sub("-"; "_"; "g")),
+        description: .describe,
+        parameters: parse_parameter([.flag_options[] | select(.id != "help" and .id != "version")])
+    }]'
\ No newline at end of file
diff --git a/scripts/create-tool.sh b/scripts/create-tool.sh
index 40d2ef3..b6d56dc 100755
--- a/scripts/create-tool.sh
+++ b/scripts/create-tool.sh
@@ -1,17 +1,20 @@
 #!/usr/bin/env bash
 set -e
 
-# @describe Create a boilplate tool script file.
+# @describe Create a boilplate tool scriptfile.
+#
 # It automatically generate declaration json for `*.py` and `*.js` and generate `@option` tags for `.sh`.
 # Examples:
 #   argc create abc.sh foo bar! baz+ qux*
 #   ./scripts/create-tool.sh test.py foo bar! baz+ qux*
+#
+# @flag --force Override the exist tool file
 # @arg name! The script file name.
 # @arg params* The script parameters
 
 main() {
     output="tools/$argc_name"
-    if [[ -f "$output" ]]; then
+    if [[ -f "$output" ]] && [[ -z "$argc_force" ]]; then
         _die "$output already exists"
     fi
     ext="${argc_name##*.}"
@@ -25,6 +28,7 @@ main() {
     py) create_py ;;
     *) _die "Invalid extension name: $ext, must be one of ${support_exts[*]}" ;; 
     esac
+    _die "$output generated"
 }
 
 create_sh() {
@@ -49,25 +53,91 @@ EOF
 }
 
 create_js() {
+    properties=''
+    for param in "${argc_params[@]}"; do
+        if [[ "$param" == *'!' ]]; then
+            param="${param:0:$((${#param}-1))}"
+            property=" * @property {string} $param - "
+        elif [[ "$param" == *'+' ]]; then
+            param="${param:0:$((${#param}-1))}"
+            property=" * @property {string[]} $param - "
+        elif [[ "$param" == *'*' ]]; then
+            param="${param:0:$((${#param}-1))}"
+            property=" * @property {string[]} [$param] - "
+        else
+            property=" * @property {string} [$param] - "
+        fi
+        properties+=$'\n'"$property"
+    done
     cat <<EOF > "$output"
-exports.declarate = function declarate() {
-  return $(build_schema)
-}
-
-exports.execute = function execute(data) {
-  console.log(data)
+/**
+ *
+ * @typedef {Object} Args${properties}
+ * @param {Args} args
+ */
+exports.main = function main(args) {
+  console.log(args);
 }
 EOF
 }
 
 create_py() {
+    has_array_param=false
+    has_optional_pram=false
+    required_properties=''
+    optional_properties=''
+    required_arguments=()
+    optional_arguments=()
+    indent="    "
+    for param in "${argc_params[@]}"; do
+        optional=false
+        if [[ "$param" == *'!' ]]; then
+            param="${param:0:$((${#param}-1))}"
+            type="str"
+        elif [[ "$param" == *'+' ]]; then
+            param="${param:0:$((${#param}-1))}"
+            type="List[str]"
+            has_array_param=true
+        elif [[ "$param" == *'*' ]]; then
+            param="${param:0:$((${#param}-1))}"
+            type="Optional[List[str]] = None"
+            optional=true
+            has_array_param=true
+        else
+            optional=true
+            type="Optional[str] = None"
+        fi
+        if [[ "$optional" == "true" ]]; then
+            has_optional_pram=true
+            optional_arguments+="$param: $type, "
+            optional_properties+=$'\n'"$indent$indent$param: -"
+        else
+            required_arguments+="$param: $type, "
+            required_properties+=$'\n'"$indent$indent$param: -"
+        fi
+    done
+    import_typing_members=()
+    if [[ "$has_array_param" == "true" ]]; then
+        import_typing_members+=("List")
+    fi
+    if [[ "$has_optional_pram" == "true" ]]; then
+        import_typing_members+=("Optional")
+    fi
+    imports=""
+    if [[ -n "$import_typing_members" ]]; then
+        members="$(echo "${import_typing_members[*]}" | sed 's/ /, /')"
+        imports="from typing import $members"$'\n'
+    fi
+    if [[ -n "$imports" ]]; then
+        imports="$imports"$'\n'
+    fi
     cat <<EOF > "$output"
-def declarate():
-  return $(build_schema) 
-
-
-def execute(data):
-  print(data)
+${imports}
+def main(${required_arguments}${optional_arguments}):
+    """
+    Args:${required_properties}${optional_properties}
+    """
+    pass
 EOF
 }
 
diff --git a/scripts/run-tool.js b/scripts/run-tool.js
index 43a6587..f99b2e0 100755
--- a/scripts/run-tool.js
+++ b/scripts/run-tool.js
@@ -58,23 +58,18 @@ const [funcName, funcData] = parseArgv();
 
 process.env["LLM_FUNCTION_NAME"] = funcName;
 
-if (process.env["LLM_FUNCTION_ACTION"] == "declarate") {
-  const { declarate } = loadFunc(funcName);
-  console.log(JSON.stringify(declarate(), null, 2));
-} else {
-  if (!funcData) {
-    console.log("No json data");
-    process.exit(1);
-  }
-
-  let args;
-  try {
-    args = JSON.parse(funcData);
-  } catch {
-    console.log("Invalid json data");
-    process.exit(1);
-  }
+if (!funcData) {
+  console.log("No json data");
+  process.exit(1);
+}
 
-  const { execute } = loadFunc(funcName);
-  execute(args);
+let args;
+try {
+  args = JSON.parse(funcData);
+} catch {
+  console.log("Invalid json data");
+  process.exit(1);
 }
+
+const { main } = loadFunc(funcName);
+main(args);
diff --git a/scripts/run-tool.py b/scripts/run-tool.py
index 30968a1..97d1d25 100755
--- a/scripts/run-tool.py
+++ b/scripts/run-tool.py
@@ -5,6 +5,7 @@ import json
 import sys
 import importlib.util
 
+
 def parse_argv():
     func_name = sys.argv[0]
     func_data = None
@@ -21,6 +22,7 @@ def parse_argv():
 
     return func_name, func_data
 
+
 def load_func(func_name):
     func_file_name = f"{func_name}.py"
     func_path = os.path.join(os.environ["LLM_FUNCTIONS_DIR"], f"tools/{func_file_name}")
@@ -33,20 +35,24 @@ def load_func(func_name):
         print(f"Invalid function: {func_file_name}")
         sys.exit(1)
 
+
 def load_env(file_path):
     try:
-        with open(file_path, 'r') as f:
+        with open(file_path, "r") as f:
             for line in f:
                 line = line.strip()
-                if line.startswith('#') or line == '':
+                if line.startswith("#") or line == "":
                     continue
 
-                key, *value = line.split('=')
-                os.environ[key.strip()] = '='.join(value).strip()
+                key, *value = line.split("=")
+                os.environ[key.strip()] = "=".join(value).strip()
     except FileNotFoundError:
         pass
 
-os.environ["LLM_FUNCTIONS_DIR"] = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
+
+os.environ["LLM_FUNCTIONS_DIR"] = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), "..")
+)
 
 load_env(os.path.join(os.environ["LLM_FUNCTIONS_DIR"], ".env"))
 
@@ -54,20 +60,16 @@ func_name, func_data = parse_argv()
 
 os.environ["LLM_FUNCTION_NAME"] = func_name
 
-if os.getenv("LLM_FUNCTION_ACTION") == "declarate":
-    module = load_func(func_name)
-    print(json.dumps(module.declarate(), indent=2))
-else:
-    if not func_data:
-        print("No json data")
-        sys.exit(1)
+if not func_data:
+    print("No json data")
+    sys.exit(1)
 
-    args = None
-    try:
-        args = json.loads(func_data)
-    except (json.JSONDecodeError, TypeError):
-        print("Invalid json data")
-        sys.exit(1)
+args = None
+try:
+    args = json.loads(func_data)
+except (json.JSONDecodeError, TypeError):
+    print("Invalid json data")
+    sys.exit(1)
 
-    module = load_func(func_name)
-    module.execute(args)
\ No newline at end of file
+module = load_func(func_name)
+module.main(**args)
diff --git a/scripts/run-tool.sh b/scripts/run-tool.sh
index 6f5befc..bd32a49 100755
--- a/scripts/run-tool.sh
+++ b/scripts/run-tool.sh
@@ -27,76 +27,32 @@ if [[ "$OS" == "Windows_NT" ]]; then
     func_file="$(cygpath -w "$func_file")"
 fi
 
-if [[ "$LLM_FUNCTION_ACTION" == "declarate" ]]; then
-    argc --argc-export "$func_file" | \
-    $JQ -r '
-    def parse_description(flag_option):
-        if flag_option.describe == "" then
-            {}
-        else
-            { "description": flag_option.describe }
-        end;
-
-    def parse_enum(flag_option):
-        if flag_option.choice.type == "Values" then
-            { "enum": flag_option.choice.data }
-        else
-            {}
-        end;
-
-    def parse_property(flag_option):
-        [
-            { condition: (flag_option.flag == true), result: { type: "boolean" } },
-            { condition: (flag_option.multiple_occurs == true), result: { type: "array", items: { type: "string" } } },
-            { condition: (flag_option.notations[0] == "INT"), result: { type: "integer" } },
-            { condition: (flag_option.notations[0] == "NUM"), result: { type: "number" } },
-            { condition: true, result: { type: "string" } } ]
-        | map(select(.condition) | .result) | first 
-        | (. + parse_description(flag_option))
-        | (. + parse_enum(flag_option))
-        ;
-
-
-    def parse_parameter(flag_options):
-        {
-            type: "object",
-            properties: (reduce flag_options[] as $item ({}; . + { ($item.id | sub("-"; "_"; "g")): parse_property($item) })),
-            required: [flag_options[] | select(.required == true) | .id],
-        };
+if [[ -z "$func_data" ]]; then
+    echo "No json data"
+    exit 1
+fi
 
-    {
-        name: (.name | sub("-"; "_"; "g")),
-        description: .describe,
-        parameters: parse_parameter([.flag_options[] | select(.id != "help" and .id != "version")])
-    }'
-else
-    if [[ -z "$func_data" ]]; then
-        echo "No json data"
-        exit 1
+data="$(
+    echo "$func_data" | \
+    $JQ -r '
+    to_entries | .[] | 
+    (.key | split("_") | join("-")) as $key |
+    if .value | type == "array" then
+        .value | .[] | "--\($key)\n\(. | @json)"
+    elif .value | type == "boolean" then
+        if .value then "--\($key)" else "" end
+    else
+        "--\($key)\n\(.value | @json)"
+    end'
+)" || {
+    echo "Invalid json data"
+    exit 1
+}
+while IFS= read -r line; do
+    if [[ "$line" == '--'* ]]; then
+        args+=("$line")
+    else
+        args+=("$(echo "$line" | $JQ -r '.')")
     fi
-
-    data="$(
-        echo "$func_data" | \
-        $JQ -r '
-        to_entries | .[] | 
-        (.key | split("_") | join("-")) as $key |
-        if .value | type == "array" then
-            .value | .[] | "--\($key)\n\(. | @json)"
-        elif .value | type == "boolean" then
-            if .value then "--\($key)" else "" end
-        else
-            "--\($key)\n\(.value | @json)"
-        end'
-    )" || {
-        echo "Invalid json data"
-        exit 1
-    }
-    while IFS= read -r line; do
-        if [[ "$line" == '--'* ]]; then
-            args+=("$line")
-        else
-            args+=("$(echo "$line" | $JQ -r '.')")
-        fi
-    done <<< "$data"
-    "$func_file" "${args[@]}"
-fi
\ No newline at end of file
+done <<< "$data"
+"$func_file" "${args[@]}"
\ No newline at end of file
diff --git a/tools/demo_tool.js b/tools/demo_tool.js
new file mode 100644
index 0000000..f8fd283
--- /dev/null
+++ b/tools/demo_tool.js
@@ -0,0 +1,16 @@
+/**
+ * Demonstrate how to create a tool using Javascript and how to use comments.
+ * @typedef {Object} Args
+ * @property {string} string - Define a required string property
+ * @property {'foo'|'bar'} string_enum - Define a required string property with enum
+ * @property {string} [string_optional] - Define a optional string property
+ * @property {boolean} boolean - Define a required boolean property
+ * @property {Integer} integer - Define a required integer property
+ * @property {number} number - Define a required number property
+ * @property {string[]} array - Define a required string array property
+ * @property {string[]} [array_optional] - Define a optional string array property
+ * @param {Args} args
+ */
+exports.main = function main(args) {
+  console.log(args);
+}
diff --git a/tools/demo_tool.py b/tools/demo_tool.py
new file mode 100644
index 0000000..bd353ad
--- /dev/null
+++ b/tools/demo_tool.py
@@ -0,0 +1,32 @@
+from typing import List, Literal, Optional
+
+
+def main(
+    boolean: bool,
+    string: str,
+    string_enum: Literal["foo", "bar"],
+    integer: int,
+    number: float,
+    array: List[str],
+    string_optional: Optional[str] = None,
+    array_optional: Optional[List[str]] = None,
+) -> None:
+    """Demonstrate how to create a tool using Python and how to use comments.
+    Args:
+        boolean: Define a required boolean property
+        string: Define a required string property
+        string_enum: Define a required string property with enum
+        integer: Define a required integer property
+        number: Define a required number property
+        array: Define a required string array property
+        string_optional: Define a optional string property
+        array_optional: Define a optional string array property
+    """
+    print(f"boolean: {boolean}")
+    print(f"string: {string}")
+    print(f"string_enum: {string_enum}")
+    print(f"integer: {integer}")
+    print(f"number: {number}")
+    print(f"array: {array}")
+    print(f"string_optional: {string_optional}")
+    print(f"array_optional: {array_optional}")
diff --git a/tools/demo_tool.sh b/tools/demo_tool.sh
new file mode 100755
index 0000000..0d24c75
--- /dev/null
+++ b/tools/demo_tool.sh
@@ -0,0 +1,15 @@
+# @describe Demonstrate how to create a tool using Bash and how to use comment tags.
+# @option --string!                  Define a required string property
+# @option --string-enum![foo|bar]    Define a required string property with enum
+# @option --string-optional          Define a optional string property
+# @flag --boolean                    Define a boolean property
+# @option --integer! <INT>           Define a required integer property
+# @option --number! <NUM>            Define a required number property
+# @option --array+ <VALUE>           Define a required string array property
+# @option --array-optional*          Define a optional string array property
+
+main() {
+    ( set -o posix ; set ) | grep ^argc_ # inspect all argc variables
+}
+
+eval "$(argc --argc-eval "$0" "$@")"
\ No newline at end of file
diff --git a/tools/may_execute_js_code.js b/tools/may_execute_js_code.js
index 9575582..2dec177 100644
--- a/tools/may_execute_js_code.js
+++ b/tools/may_execute_js_code.js
@@ -1,22 +1,9 @@
-exports.declarate = function declarate() {
-  return {
-    "name": "may_execute_js_code",
-    "description": "Runs the javascript code in node.js.",
-    "parameters": {
-      "type": "object",
-      "properties": {
-        "code": {
-          "type": "string",
-          "description": "Javascript code to execute, such as `console.log(\"hello world\")`"
-        }
-      },
-      "required": [
-        "code"
-      ]
-    }
-  }
-}
-
-exports.execute = function execute(data) {
-  eval(data.code)
+/**
+ * Runs the javascript code in node.js.
+ * @typedef {Object} Args
+ * @property {string} code - Javascript code to execute, such as `console.log("hello world")`
+ * @param {Args} args
+ */
+exports.main = function main({ code }) {
+  eval(code);
 }
diff --git a/tools/may_execute_py_code.py b/tools/may_execute_py_code.py
index 01a59b9..8e55a8d 100644
--- a/tools/may_execute_py_code.py
+++ b/tools/may_execute_py_code.py
@@ -1,21 +1,6 @@
-def declarate():
-  return {
-    "name": "may_execute_py_code",
-    "description": "Runs the python code.",
-    "parameters": {
-      "type": "object",
-      "properties": {
-        "code": {
-          "type": "string",
-          "description": "Python code to execute, such as `print(\"hello world\")`"
-        }
-      },
-      "required": [
-        "code"
-      ]
-    }
-  }
-
-
-def execute(data):
-  exec(data["code"])
+def main(code: str):
+    """Runs the python code.
+    Args:
+        code: Python code to execute, such as `print("hello world")`
+    """
+    exec(code)