diff --git a/README.md b/README.md
index c142b3f..115f1c3 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,8 @@ A language server for [tmux](https://github.com/tmux/tmux)'s tmux.conf.
 - [x] [Hover](https://microsoft.github.io/language-server-protocol/specifications/specification-current#textDocument_hover)
 - [x] [Completion](https://microsoft.github.io/language-server-protocol/specifications/specification-current#textDocument_completion)
 
+![Diagnostic](https://github.com/Freed-Wu/tmux-language-server/assets/32936898/a92a7d41-4ade-486b-98ef-14382d6d4722)
+
 ![Document hover](https://github.com/Freed-Wu/tmux-language-server/assets/32936898/631db877-4cde-4b87-9548-c0a66335a83d)
 
 ![Completion](https://github.com/Freed-Wu/tmux-language-server/assets/32936898/a9793a05-7da6-4fcb-88bf-4ca82ccfbfc1)
diff --git a/src/tmux_language_server/__main__.py b/src/tmux_language_server/__main__.py
index 9af6b4d..61ded86 100644
--- a/src/tmux_language_server/__main__.py
+++ b/src/tmux_language_server/__main__.py
@@ -55,6 +55,12 @@ def get_parser():
         default="auto",
         help="when to display color, default: %(default)s",
     )
+    parser.add_argument(
+        "--convert",
+        nargs="*",
+        default={},
+        help="convert files to output format",
+    )
     parser.add_argument(
         "--output-format",
         choices=["json", "yaml", "toml"],
@@ -68,12 +74,13 @@ def main():
     r"""Parse arguments and provide shell completions."""
     args = get_parser().parse_args()
 
-    if args.generate_schema or args.check:
+    if args.generate_schema or args.check or args.convert:
         from tree_sitter_lsp.diagnose import check
         from tree_sitter_lsp.utils import pprint
         from tree_sitter_tmux import parser
 
         from .finders import DIAGNOSTICS_FINDER_CLASSES
+        from .schema import TmuxTrie
 
         if args.generate_schema:
             from .misc import get_schema
@@ -84,6 +91,12 @@ def main():
                 indent=args.indent,
             )
             return None
+        for file in args.convert:
+            pprint(
+                TmuxTrie.from_file(file, parser.parse).to_json(),
+                filetype=args.output_format,
+                indent=args.indent,
+            )
         exit(
             check(
                 args.check,
diff --git a/src/tmux_language_server/assets/json/tmux.json b/src/tmux_language_server/assets/json/tmux.json
index da79bd6..1acd514 100644
--- a/src/tmux_language_server/assets/json/tmux.json
+++ b/src/tmux_language_server/assets/json/tmux.json
@@ -4,11 +4,6 @@
   "$comment": "Don't edit this file directly! It is generated by `tmux-language-server --generate-schema=tmux`.",
   "type": "object",
   "properties": {
-    "patternProperties": {
-      "@[-_\\da-zA-Z]": {
-        "type": "string"
-      }
-    },
     "attach-session": {
       "description": "```tmux\nattach-session [-dErx] [-c working-directory] [-f flags] [-t target-session]\nattach [-dErx] [-c working-directory] [-f flags] [-t target-session]\n```\n\nIf run from outside tmux, create a new client in the current terminal and attach it to target-session. If used from inside, switch the current client. If -d is specified, any other clients attached to the session are detached. If -x is given, send SIGHUP to the parent process of the client as well as detaching the client, typically causing it to exit. -f sets a comma-separated list of client flags. The flags are:"
     },
@@ -91,7 +86,12 @@
       "description": "```tmux\nshow-messages [-JT] [-t target-client]\nshowmsgs [-JT] [-t target-client]\n```\n\nShow server messages or information. Messages are stored, up to a maximum of the limit set by the message-limit server option. -J and -T show debugging information about jobs and terminals."
     },
     "source-file": {
-      "description": "```tmux\nsource-file [-Fnqv] path ...\nsource [-Fnqv] path ...\n```\n\nExecute commands from one or more files specified by path (which may be glob(7) patterns). If -F is present, then path is expanded as a format. If -q is given, no error will be returned if path does not exist. With -n, the file is parsed but no commands are executed. -v shows the parsed commands and line numbers if possible."
+      "description": "```tmux\nsource-file [-Fnqv] path ...\nsource [-Fnqv] path ...\n```\n\nExecute commands from one or more files specified by path (which may be glob(7) patterns). If -F is present, then path is expanded as a format. If -q is given, no error will be returned if path does not exist. With -n, the file is parsed but no commands are executed. -v shows the parsed commands and line numbers if possible.",
+      "type": "array",
+      "uniqueItems": true,
+      "items": {
+        "type": "string"
+      }
     },
     "source": {
       "description": "```tmux\nsource-file [-Fnqv] path ...\nsource [-Fnqv] path ...\n```\n\nExecute commands from one or more files specified by path (which may be glob(7) patterns). If -F is present, then path is expanded as a format. If -q is given, no error will be returned if path does not exist. With -n, the file is parsed but no commands are executed. -v shows the parsed commands and line numbers if possible."
@@ -367,9 +367,6 @@
       "description": "```tmux\nunbind-key [-anq] [-T key-table] key\nunbind [-anq] [-T key-table] key\n```\n\nUnbind the command bound to key. -n and -T are the same as for bind-key. If -a is present, all key bindings are removed. The -q option prevents errors being returned."
     },
     "set-option": {
-      "description": "```tmux\nset-option [-aFgopqsuUw] [-t target-pane] option value\nset [-aFgopqsuUw] [-t target-pane] option value\n```\n\nSet a pane option with -p, a window option with -w, a server option with -s, otherwise a session option. If the option is not a user option, -w or -s may be unnecessary - tmux will infer the type from the option name, assuming -w for pane options. If -g is given, the global session or window option is set."
-    },
-    "set": {
       "description": "```tmux\nset-option [-aFgopqsuUw] [-t target-pane] option value\nset [-aFgopqsuUw] [-t target-pane] option value\n```\n\nSet a pane option with -p, a window option with -w, a server option with -s, otherwise a session option. If the option is not a user option, -w or -s may be unnecessary - tmux will infer the type from the option name, assuming -w for pane options. If -g is given, the global session or window option is set.",
       "properties": {
         "backspace": {
@@ -991,8 +988,16 @@
           "description": "```tmux\nset window-style style\n```\n\nSet the pane style. For how to specify style, see the \u201cSTYLES\u201d section.",
           "type": "string"
         }
+      },
+      "patternProperties": {
+        "@[-_\\da-zA-Z]": {
+          "type": "string"
+        }
       }
     },
+    "set": {
+      "description": "```tmux\nset-option [-aFgopqsuUw] [-t target-pane] option value\nset [-aFgopqsuUw] [-t target-pane] option value\n```\n\nSet a pane option with -p, a window option with -w, a server option with -s, otherwise a session option. If the option is not a user option, -w or -s may be unnecessary - tmux will infer the type from the option name, assuming -w for pane options. If -g is given, the global session or window option is set."
+    },
     "show-options": {
       "description": "```tmux\nshow-options [-AgHpqsvw] [-t target-pane] [option]\nshow [-AgHpqsvw] [-t target-pane] [option]\n```\n\nShow the pane options (or a single option if option is provided) with -p, the window options with -w, the server options with -s, otherwise the session options. If the option is not a user option, -w or -s may be unnecessary - tmux will infer the type from the option name, assuming -w for pane options. Global session or window options are listed if -g is used. -v shows only the option value, not the name. If -q is set, no error will be returned if option is unset. -H includes hooks (omitted by default). -A includes options inherited from a parent set of options, such options are marked with an asterisk."
     },
diff --git a/src/tmux_language_server/finders.py b/src/tmux_language_server/finders.py
index a7511dc..190d856 100644
--- a/src/tmux_language_server/finders.py
+++ b/src/tmux_language_server/finders.py
@@ -5,9 +5,10 @@
 from dataclasses import dataclass
 
 from lsprotocol.types import DiagnosticSeverity
-from tree_sitter_lsp.finders import ErrorFinder, QueryFinder
+from tree_sitter_lsp.finders import ErrorFinder, QueryFinder, SchemaFinder
 
-from .utils import get_query
+from .schema import TmuxTrie
+from .utils import get_query, get_schema
 
 
 @dataclass(init=False)
@@ -30,6 +31,20 @@ def __init__(
         super().__init__(query, message, severity)
 
 
+@dataclass(init=False)
+class TmuxFinder(SchemaFinder):
+    r"""Tmuxfinder."""
+
+    def __init__(self) -> None:
+        r"""Init.
+
+        :rtype: None
+        """
+        self.validator = self.schema2validator(get_schema())
+        self.cls = TmuxTrie
+
+
 DIAGNOSTICS_FINDER_CLASSES = [
     ErrorFinder,
+    TmuxFinder,
 ]
diff --git a/src/tmux_language_server/misc/__init__.py b/src/tmux_language_server/misc/__init__.py
index 12a61b7..3ca057d 100644
--- a/src/tmux_language_server/misc/__init__.py
+++ b/src/tmux_language_server/misc/__init__.py
@@ -31,9 +31,7 @@ def get_schema() -> dict[str, Any]:
             f"`{project} --generate-schema={filetype}`."
         ),
         "type": "object",
-        "properties": {
-            "patternProperties": {"@[-_\\da-zA-Z]": {"type": "string"}}
-        },
+        "properties": {},
     }
     soup = get_soup("tmux.1", "groff", "mdoc")
     p = soup.find("p", string="CLIENTS AND SESSIONS")
@@ -67,7 +65,7 @@ def get_schema() -> dict[str, Any]:
                 continue
             if name == "backspace":
                 isoption = 1
-                schema["properties"]["set"]["properties"] = {}
+                schema["properties"]["set-option"]["properties"] = {}
             s = ""
             enum = []
             if isoption:
@@ -86,14 +84,14 @@ def get_schema() -> dict[str, Any]:
             description += "\n" + p.text.replace("\n", " ")
             description = description.replace("\u2212", "-")
             if isoption:
-                schema["properties"]["set"]["properties"][name] = {
+                schema["properties"]["set-option"]["properties"][name] = {
                     "description": description,
                     "type": _type,
                 }
                 if len(enum) > 1:
-                    schema["properties"]["set"]["properties"][name]["enum"] = (
-                        enum
-                    )
+                    schema["properties"]["set-option"]["properties"][name][
+                        "enum"
+                    ] = enum
                 if s in {
                     "number",
                     "height",
@@ -102,7 +100,7 @@ def get_schema() -> dict[str, Any]:
                     "time",
                     "lines",
                 }:
-                    schema["properties"]["set"]["properties"][name][
+                    schema["properties"]["set-option"]["properties"][name][
                         "pattern"
                     ] = "\\d+"
             else:
@@ -112,4 +110,8 @@ def get_schema() -> dict[str, Any]:
             if name == "window-style":
                 isoption = 0
         p = p.find_next("p")
+    data = {"type": "array", "uniqueItems": True, "items": {"type": "string"}}
+    schema["properties"]["source-file"] |= data
+    data = {"patternProperties": {"@[-_\\da-zA-Z]": {"type": "string"}}}
+    schema["properties"]["set-option"] |= data
     return schema
diff --git a/src/tmux_language_server/schema.py b/src/tmux_language_server/schema.py
new file mode 100644
index 0000000..8e368aa
--- /dev/null
+++ b/src/tmux_language_server/schema.py
@@ -0,0 +1,73 @@
+r"""Schema
+==========
+"""
+
+from dataclasses import dataclass
+
+from lsprotocol.types import Position, Range
+from tree_sitter import Node
+from tree_sitter_lsp import UNI
+from tree_sitter_lsp.schema import Trie
+
+DIRECTIVES = {
+    "set_option_directive",
+    "source_file_directive",
+}
+
+
+@dataclass
+class TmuxTrie(Trie):
+    r"""Tmux Trie."""
+
+    value: dict[str, "Trie"] | list["Trie"] | str  # type: ignore
+
+    @classmethod
+    def from_node(cls, node: Node, parent: "Trie | None") -> "Trie":
+        r"""From node.
+
+        :param node:
+        :type node: Node
+        :param parent:
+        :type parent: Trie | None
+        :rtype: "Trie"
+        """
+        if node.type == "value":
+            return cls(
+                UNI.node2range(node), parent, UNI.node2text(node).strip("'\"")
+            )
+        if node.type == "file":
+            trie = cls(Range(Position(0, 0), Position(1, 0)), parent, {})
+            for child in node.children:
+                if child.type not in DIRECTIVES:
+                    continue
+                # directive name
+                _type = child.type.split("_directive")[0].replace("_", "-")
+                # add directive name to trie.value if it doesn't exist
+                _value: dict[str, Trie] = trie.value  # type: ignore
+                if _type not in _value:
+                    trie.value[_type] = cls(  # type: ignore
+                        UNI.node2range(child),
+                        trie,
+                        {} if _type != "source-file" else [],
+                    )
+                # the dictionary's key corresponding to directive name
+                subtrie: Trie = trie.value[_type]  # type: ignore
+                # currently, only support set and source
+                # set is a dict, source is a list
+                value = subtrie.value  # type: ignore
+                # fill subtrie.value
+                if child.type == "set_option_directive":
+                    value: dict[str, Trie]
+                    value[UNI.node2text(child.children[-2])] = cls.from_node(
+                        child.children[-1], subtrie
+                    )
+                elif child.type == "source_file_directive":
+                    value += [  # type: ignore
+                        cls(
+                            UNI.node2range(child.children[1]),
+                            subtrie,
+                            UNI.node2text(child.children[1]),
+                        )
+                    ]
+            return trie
+        raise NotImplementedError(node.type)
diff --git a/tests/tmux.conf b/tests/tmux.conf
new file mode 100644
index 0000000..d1f359d
--- /dev/null
+++ b/tests/tmux.conf
@@ -0,0 +1,2 @@
+set -g pane-base-index a
+set -g set-titles not-on