Feng CLI

feng provides project workflows, language-service entry points, and advanced compiler diagnostics.

Global Help

feng --help
feng --version
feng build --help

When an argument is invalid, the CLI explains the problem, prints the relevant usage information, and exits with a nonzero status.

Everyday Project Commands

Command	Purpose
feng init [name] [--target=bin|lib]	Initialize a project in an empty directory
feng check [path] [--format text|json]	Check the entire project without producing a final artifact
feng build [path] [--release]	Build a project
feng run [path] [--release] [-- args...]	Build and run an executable project
feng clean [path]	Remove project build artifacts
feng pack [path]	Create a release build and package a library project

For most project commands, path can be either a project directory or a feng.fm file. If omitted, the command uses the manifest in the current directory.

Dependency Commands

feng deps add <name> <version-or-path>
feng deps remove <name>
feng deps install
feng deps install --force

Feng uses exact versions and does not provide deps update. To upgrade a dependency, run deps add again with the new version.

Platform Options

build and pack accept repeated --platform=<platform> options. For a single platform, you can also pass --sysroot=<path>. run always selects the current host platform and does not accept --platform.

Language and Debug Services

feng lsp --stdio
feng dap --stdio

These entry points are launched by editor clients and do not need to be invoked directly in a regular interactive terminal.

Advanced Diagnostics

feng tool lex <file>
feng tool parse <file>
feng tool semantic <file> [more-files...]
feng tool check <file> [more-files...]
feng tool compile <file>

tool is intended for investigating compiler behavior and integrating third-party tools. For normal projects, prefer feng check and feng build.

Commands Not Currently Available

• No feng test: tests are regular executable projects run with feng run.
• No feng fmt: formatting is currently provided by the editor extension.
• No feng publish: there is currently no official registry publishing workflow.
• No feng deps update: dependency versions are always exact.