Qbox Lua

CfxLua language tools for FiveM resource development.

Install from VS Code Marketplace · Release notes · Report an issue

Write Lua resources with native completion, diagnostics, formatting and navigation in one extension. Qbox Lua understands CfxLua syntax and reads fxmanifest.lua to track client, server and shared scripts, resource dependencies, exports and events.

The language server is included. You can work on a single resource or an entire resources folder, without installing Rust or a separate language server.

Built for resource development

Feature	What it helps you do
Completion and hover	Look up FiveM natives, runtime globals, exports and LuaCATS types as you write.
Control and flag IDs	Hover a native's numeric control or ped configuration flag argument for its documented name and reference.
FiveM reference tab	Search natives, controls and ped flags, read documentation and insert Lua calls or IDs.
Diagnostics and quick fixes	Find Lua mistakes, missing manifest imports and event/export mismatches in the Problems panel.
Client/server context	Catch calls used on the wrong side and see the current file's side in the status bar.
Navigation and rename	Follow definitions and references across your workspace and rename supported symbols.
Formatting	Format Lua with shared project settings in qbxlint.toml.
Syntax and editor hints	Read CfxLua backtick hashes, LuaCATS annotations, semantic highlighting, signature help and parameter hints.
Annotation typing	Press Enter after a ---@param line to start the next one with ---@; Enter on a bare ---@ clears it. Typing a letter after ---@ lists the tags, previewing the rest of the selected one in gray; Tab accepts it.
Framework callbacks	Complete QB-Core/ESX callback names, find server handlers and see payload hints from local Lua code.
Snippet browser	Preview and insert Lua recipes, manifest templates, and personal or workspace snippets.
Resource wizard	Preview and create a new resource from a plain Lua, ox_lib or Qbox starter.
Resource Details	Inspect file counts, events, exports and resource dependencies in an editor tab.
NUI preview	Preview a local built UI, send JSON messages, mock callback responses and open Lua handlers.
Runtime log viewer	Follow a selected server log, filter recent output and open Lua stack traces in the editor.
Workspace health	Check language-server availability, duplicate resource names and unresolved indexed dependencies.
Lua utilities	Calculate joaat hashes, pick RGB/hex colors, and convert JSON into an editable Lua table.
Resource assets	Browse files, preview supported media and GTA textures, and inspect asset references and manifest issues.
Coding assistant tools	Query resource information, diagnostics, symbol references and FiveM documentation through VS Code or MCP.

This editor is part of Qbox Lua (qbx-lua). Its language server, qbx-lua-ls, and the qbx-lint command-line linter live in the qbx-lua tooling workspace. The editor and command-line linter share rule configuration, so your local feedback and CI checks can agree.

Get started

1. Install Qbox Lua - CfxLua & FiveM from the VS Code Marketplace.
2. Open a resource folder containing fxmanifest.lua, or your server's resources folder.
3. Open a Lua file. Disable other Lua language-server extensions for that workspace if they produce duplicate diagnostics or completions.

Resources referenced by the manifest and located beside the open resource are found automatically. If a dependency lives elsewhere, add its folder to qbxLua.library in VS Code settings:

{
  "qbxLua.library": [
    "/path/to/server/resources/[ox]/ox_lib",
    "/path/to/server/resources/[qbx]/qbx_core"
  ]
}

This extension runs in your editor. It does not need to be added to server.cfg or started as a FiveM resource.

Framework callback navigation

QB-Core's Functions.CreateCallback / Functions.TriggerCallback and ESX's RegisterServerCallback / TriggerServerCallback use locally indexed server registrations for callback-name completion and Go to Definition. Signature help and parameter hints show the payload after the handler's source and cb parameters. LuaCATS annotations on local handler functions supply their types.

Use the normal framework export initialization, including local aliases:

local Core = exports['qb-core']:GetCoreObject()
Core.Functions.TriggerCallback('garage:lookup', function(result)
    -- Use the response here.
end, 'central')

The adapters recognize framework imports and exports rather than relying on a variable's name. ESX's @es_extended/imports.lua is supported too. Client/server manifest entries and IsDuplicityVersion() guards establish the call's side. Callback names must be literal strings, and the server handler must be available in the indexed workspace or library. Conflicting handler payloads are omitted from hints; definitions can still show all matching registrations.

This uses local code without fetching framework documentation. Async response types, custom wrappers and client-callback/Await variants are outside these adapters. Existing ox_lib callbacks remain supported.

Control resources from Explorer

Right-click a resource folder in VS Code's normal Explorer and choose FiveM → Start Resource, Stop Resource, Restart Resource, or Open Manifest. Your existing folder hierarchy stays in place, including groups such as [qbx] and [ox]. Actions appear on folders containing fxmanifest.lua or the legacy __resource.lua, and target only that resource. Group folders and nested script folders are not action targets.

Before the first server action, enter the server's hostname/IP, UDP port and RCON password. You can also run FiveM: Configure Resource Connection from the Command Palette. The address is saved for the current workspace; the password is kept in VS Code's secret storage, outside project settings and source files. FiveM: Test Resource Connection verifies a response using an echo command. FiveM: Forget Resource Connection removes the saved address and password.

The server must have rcon_password configured and its RCON UDP port reachable from the extension host. Use the game server's UDP port (usually 30120), not txAdmin's web port. FiveM RCON transmits the password without encryption; use it over localhost or a trusted network/tunnel. Passwords containing whitespace or control characters cannot be used by this client. See the Cfx server commands reference.

Commands and server replies appear in Output → Qbox Lua Resources. A saved connection is not a claim that the server is online. If a reply times out, the command may already have run; it is never retried automatically. Cancelling only stops waiting for the response. RCON output is command response text, not a live server log stream or a resource-state monitor.

Resource names must match the connected server. Duplicate names in the workspace are rejected because RCON identifies resources by name, not by local path. Names containing spaces or console syntax are also rejected. start starts a stopped resource; restart restarts an already running one. Newly added resources need the server's refresh command before they become available. The extension does not upload files, start FXServer itself, or automatically restart on save.

Discovery follows manifest and folder creation, renaming and deletion, supports multiple workspace roots, and excludes node_modules, .git, vendor and .vscode-test. When a resource folder appears, is renamed or is removed, the language index is refreshed as well, so a downloaded resource or a git checkout needs no manual reindex. Runtime actions require a trusted workspace. In Remote SSH/WSL, the connection originates from the remote extension host; virtual filesystem workspaces are not supported for resource controls.

Follow runtime logs

Run FiveM: Open Runtime Log from the Command Palette and select an FXServer or txAdmin UTF-8 log file accessible to the VS Code extension host. The tab follows new output, including file rotation and truncation. Filter by text or resource name, pause/resume, toggle autoscroll, or clear the displayed history.

Recognized Lua traces such as @my_resource/server/main.lua:42 link to files inside discovered workspace resources. Duplicate resource names prompt for a folder; unavailable files are reported when opened. Runtime-internal paths and resources outside workspace discovery remain plain text.

The viewer retains at most 1,000 lines and 512 KiB of text, with 8,192 characters per line, and displays the latest 300 matching lines. Initial reads and large catch-ups use a bounded recent suffix and report skipped output. Clear view does not modify the log file. Closing the tab stops following the file and drops its history; no log contents or selected path are persisted by the extension. This feature reads a selected file and does not connect to txAdmin or stream RCON.

Check workspace health

Run FiveM: Workspace Health to check the language-server connection and its current indexed resources. The tab reports duplicate resource names, missing dependency/import targets and ambiguous names, with manifest links and searchable issue lists. Separate paths identify resources sharing a name.

Choose Refresh to request a new snapshot. Save manifest changes first; normal file watches or Qbox Lua: Reindex Workspace update index membership. A missing indexed dependency can be outside configured folders or excluded from analysis. The report does not verify a running server, individual imported files, computed dependency names, runtime constraints, or replacement aliases from provide. If the language server is unavailable, the tab shows that failure and offers its output channel instead of claiming the workspace passed its checks.

Both runtime tools load on demand, reuse local files or the existing index, and require no additional service or package dependency.

Inspect resource relationships

Right-click a resource folder and choose FiveM → Resource Details, or run FiveM: Resource Details from the Command Palette and choose a resource. The tab shows indexed Lua file counts by client/server/shared/module context, registered events and callbacks, exports, dependencies and dependents. Search the event/export list and open a declaration at its source line.

The small diagram reads dependents → selected resource → dependencies. Resource links switch the same tab to the linked resource. Missing and ambiguous dependencies are labeled; duplicate names retain separate folder paths so you can choose the intended resource. These relationships come from manifest dependencies and script imports, not a live running-server state.

Choose Refresh to reload the current index snapshot. Unsaved Lua edits are included; save manifest changes before refreshing their file counts or dependencies. Counts cover indexed files and declarations, with notes for incomplete data and display limits. Dynamic registrations and encrypted content may be unavailable.

The tab loads on demand, reuses the existing index and Explorer discovery, and keeps your folder hierarchy intact. It requires no additional dependency or service.

Preview a NUI interface

In a trusted workspace, right-click a resource folder and choose FiveM → Open NUI Preview, or run FiveM: Open NUI Preview from the Command Palette. The resource needs a literal, local HTML ui_page, such as web/dist/index.html. Build the frontend first, using a relative asset base such as ./, then use Reload preview after subsequent builds. Choose resource… switches resources in the same tab.

Enter the payload your UI expects under Message, then choose Send message. Under Mock responses, enter a JSON object whose keys are callback names and whose values are their responses, then choose Apply mocks. Callback activity shows recent requests and responses; Open Lua handler and the searchable Lua callbacks list open matching indexed handlers.

Use a Preset name and Save to keep both JSON fields for that resource in the current workspace. Loading a preset fills the fields without sending or applying them; Delete explicitly removes it. Presets are extension workspace state, not project files.

The preview runs browser UI scripts without a game runtime or Lua execution. Assets must be in the local UI directory; external/CDN URLs, game assets and other resources' assets are unsupported. A page's existing Content Security Policy can also prevent it from loading or starting the preview bridge. See the NUI preview guide for examples and troubleshooting.

Use Lua utilities

Run Qbox Lua: Open Lua Utilities to calculate joaat hashes in hexadecimal, signed or unsigned form, convert RGB/hex colors, or turn JSON into a Lua table. Each utility has explicit copy and insertion actions. The tab shows the Lua file that will receive inserted text; focus another Lua editor to change it.

JSON conversion preserves integer text, quotes Lua keys safely and uses json.null for null values by default. Review or edit the output before inserting it. All calculations run locally. See the Lua utilities guide for supported inputs and conversion choices.

Browse resource assets

Right-click a resource folder and choose FiveM → Browse Resource Assets, or run FiveM: Browse Resource Assets from the Command Palette. Search its asset inventory, select a file for format information and supported previews, and open the Lua or manifest locations that refer to it. Refresh after changing files.

Supported previews include common browser media, DDS textures and supported Legacy/Gen9 RSC7 YTD texture dictionaries. Texture and mip choices decode only the selected image. Other GTA containers show available metadata; unsupported or encrypted formats are identified explicitly. The browser also checks literal manifest declarations and explains incomplete scan coverage. See the asset guide for format support, limits and health checks.

Connect coding assistants

Seven read-only tools expose resource discovery/details, workspace health, Lua diagnostics, symbol references and bundled FiveM reference search/details. VS Code versions with the Language Model Tool API can use them from the agent tool picker. Other clients can launch the bundled MCP stdio server with Node and explicit workspace folders; extensions can use the versioned public API.

Run FiveM: Show Coding Assistant Setup for the setup guide. The tools include partial-result notes and an explicit index refresh option after saved-file changes. VS Code tools use current editor buffers; portable MCP reads saved files. Tool results describe local static analysis and reference data.

Create a resource

Run FiveM: Create Resource from the Command Palette, or right-click the destination parent folder in Explorer and choose FiveM: Create Resource. Choose a resource name and a Plain Lua, Lua + ox_lib, or Qbox starter. The wizard opens a read-only editor preview of the destination and all four files:

my_resource/
    fxmanifest.lua
    shared/config.lua
    client/main.lua
    server/main.lua

You can read and scroll the preview while the final picker stays open. Choose Create resource when ready, change the name/starter/folder, or cancel. The manifest opens after creation. Names can contain 1–64 ASCII letters, numbers, underscores or hyphens; Windows device names are rejected.

The destination must be an existing folder on the extension host filesystem. Groups such as [local] work, and the folder picker supports multiple workspace roots. In Remote SSH/WSL, creation happens on the remote extension host. Choose a parent outside any existing resource; the wizard rejects nested resources and any existing destination, including an empty folder. If a write fails, cleanup removes only unchanged files created by that attempt and preserves other content.

The ox_lib and Qbox starters declare their imports and dependencies. Those dependencies must already be installed on your server. Generated entry files are empty except for guidance comments, and shared configuration starts with an empty Config table. See the template maintenance notes for the exact imports and source references. Creating a resource does not change server.cfg or start it on a server.

Templates are bundled and work offline. The wizard is loaded from a separate small JavaScript bundle when invoked; it adds no startup scan or watcher.

Look up control and ped flag IDs

Hover 38 in IsControlJustPressed(0, 38) to see INPUT_PICKUP, its default QWERTY binding E and Xbox binding LB, with a link to the Cfx reference. Bindings are defaults; player remapping can change them.

Numeric flag arguments in SetPedConfigFlag and GetPedConfigFlag show their documented flag names. Where the source only names a flag, the hover says that its behavior is not documented. The references are bundled and work offline; opening a source link requires a connection.

These hovers recognize the native and argument position. Variables, calculated expressions, unknown IDs and functions that shadow a native do not receive an ID reference tooltip.

Browse the FiveM reference

Run Qbox Lua: Open FiveM Reference from the Command Palette to open a reference tab beside your code. Search native names or hashes, control names or IDs, default bindings, and ped configuration flag names or IDs. Native results can be filtered by namespace and availability on the client, server or both.

Select a result to read its signature, parameters, return values and documentation, or the control/flag reference. Copy its name, hash or ID, open its source, or insert a Lua call with parameter placeholders or an ID into the Lua editor identified in the tab. Open or focus a Lua file to choose an insertion target.

The tab loads on demand, pages results, and reuses the bundled data used by hovers. Searching and reading work offline. Source links open in your browser. If the language server is unavailable, restart it and retry from the tab.

Browse and save Lua snippets

Run Qbox Lua: Open Snippet Browser (or Show Snippets) to open FiveM Snippets beside your code. Search the existing Lua recipes, manifest templates and your saved snippets by name, prefix, description or code. Filter by source, preview the body, then insert it into the Lua editor named in the tab. Copy snippet copies the exact snippet syntax, including placeholders.

Choose New snippet to add an editable starter, or Duplicate to customize an existing recipe. Select Lua code and right-click Qbox Lua: Save Selection as Snippet to save it literally, including dollar signs and backslashes. Each action lets you choose a personal library or a workspace folder. Personal snippets live in the extension's user storage and are available across projects on that extension host. Workspace snippets live in .vscode/qbx-lua-snippets.json at the chosen root, so you can commit and share them.

Use Manage JSON in the tab, Edit Personal Snippets, or Edit Workspace Snippets to edit names, descriptions, search prefixes and code. Files accept JSON comments and trailing commas. Entries use the familiar VS Code snippet fields; body can be a string or an array of lines:

{
  "My event handler": {
    "prefix": "my-event",
    "description": "Handle a resource event",
    "body": [
      "AddEventHandler('${1:resource}:${2:event}', function()",
      "\t$0",
      "end)"
    ]
  }
}

Insertion supports VS Code's snippet placeholders and variables. Custom snippets are available through this browser; their prefixes are search terms here and do not add completion suggestions. JSON edits refresh the library. If one file has errors, the tab reports them while keeping other libraries available. Adding a snippet preserves comments and refuses duplicate names or unsaved JSON edits. The browser loads on demand; custom and manifest snippets remain available when the language server is stopped. Each library is limited to 1 MiB and 1,000 snippets; each snippet body can use up to 128 KiB.

Supported environments

• VS Code 1.85 or newer on Windows x64, Linux x64/ARM64, and macOS x64/ARM64.
• FiveM / GTA V resources using CfxLua, including client, server and shared scripts.
• Qbox-specific checks are included; the Lua and FiveM tooling also works with resources that do not use Qbox.

RedM: the manifest completion includes rdr3, but the bundled native database targets FiveM and currently excludes RedM-specific natives. Full RedM language support is not advertised. Dynamic code, encrypted scripts and dependencies outside the indexed workspace can also limit analysis.

Project configuration

Add qbxlint.toml to your workspace to share lint and formatting preferences with the qbx-lint CLI and GitHub Action. For example:

exclude = ["web/**", "**/vendor/**"]
ignore_diagnostics = ['\[standalone\]/']

[rules]
"unused-argument" = "off"

[format]
indent_width = 4
use_tabs = false
line_width = 120
quote_style = "preserve"

exclude removes files from analysis entirely. ignore_diagnostics takes gitignore-style patterns for code you don't maintain: those files stay indexed for definitions and completion, but their problems are hidden.

The extension registers itself as the default Lua formatter. Without a qbxlint.toml, the formatter wraps lines longer than 120 columns; projects that keep long lines should raise line_width before enabling format on save, or the first save reflows every long statement.

quote_style also sets the quotes that built-in snippets, completions and new resource manifests write. With preserve, snippets follow the quote most strings of the file already use, and new resource manifests use single quotes.

See the configuration reference and rule list.

Editor settings

Search for qbxLua in VS Code Settings.

Setting	Default	Description
qbxLua.library	[]	Extra dependency folders to index.
qbxLua.diagnostics.enable	true	Show diagnostics.
qbxLua.diagnostics.workspace	true	Include files that are not open.
qbxLua.diagnostics.rules	{}	Rule levels: off, hint, info, warning or error. The levels a qbxlint.toml sets take precedence.
qbxLua.inlayHints.enable	true	Show parameter names beside literal arguments.
qbxLua.semanticTokens.enable	true	Enable semantic highlighting.
qbxLua.warnAboutOtherLuaExtensions	true	Warn about other active Lua language servers.
qbxLua.server.path	""	Advanced: use a custom language-server binary.
qbxLua.trace.server	"off"	Advanced: trace language-server communication with messages or verbose.

Commands and troubleshooting

Open the Command Palette and search for Qbox Lua:

• Open Snippet Browser and Show Snippets open the recipe and custom snippet tab.
• Save Selection as Snippet saves selected Lua code to a personal or workspace library.
• Edit Personal Snippets and Edit Workspace Snippets open the editable JSON libraries.
• Open FiveM Reference opens the searchable native, control and ped flag reference.
• Open Lua Utilities opens hashes, colors and JSON-to-Lua conversion.
• Show Status and Show Output help diagnose server startup and indexing.
• Reindex Workspace refreshes indexed files and manifests.
• Restart Language Server also reloads library and workspace configuration.

Search for FiveM: Create Resource to open the resource creation wizard. FiveM: Browse Resource Assets opens asset previews and checks; FiveM: Show Coding Assistant Setup opens the VS Code/API/MCP guide.

If a resource dependency is missing from completion or navigation, check that it is available beside the workspace or included in qbxLua.library. When reporting an issue, include the extension version, operating system and a small reproduction.

Other editors

The bundled server, qbx-lua-ls, is also available as a standalone executable. The editor setup guide covers the Zed extension in integrations/zed and includes Neovim 0.11+ and Helix configuration examples. None of these has been integration-tested in its editor; VS Code has an automated integration suite.

Other LSP clients need their own configuration or adapter. The VS Code commands, status bar and syntax grammars are part of this extension. A JetBrains integration is not included.

Manual installation

Marketplace installation selects the matching platform package and supports normal extension updates. For an offline or manual installation, download your platform's .vsix from GitHub Releases and run Extensions: Install from VSIX in VS Code.

You can also install from the Marketplace through the terminal:

code --install-extension qbox.qbx-lua

Development

To build the extension, run its tests or use the Extension Development Host, see CONTRIBUTING.md.

License

GPL-3.0-or-later.