diff --git a/qualcomm-software/README.md b/qualcomm-software/README.md
index fe6b57defd01..44e719146422 100644
--- a/qualcomm-software/README.md
+++ b/qualcomm-software/README.md
@@ -49,4 +49,8 @@ CPULLVM is built and tested on
 
 Binary releases of CPULLVM are available [here](https://github.com/qualcomm/cpullvm-toolchain/releases).
 
+For tips on getting started with using CPULLVM, please see [user.md](./docs/user.md).
+
 For instructions on building from source, please see [building.md](./docs/building.md).
+
+If you are interested in contributing to CPULLVM, please see [CONTRIBUTING.md](/CONTRIBUTING.md).
diff --git a/qualcomm-software/docs/user.md b/qualcomm-software/docs/user.md
index 68d3bc5a06ff..0a8a00ef0e50 100644
--- a/qualcomm-software/docs/user.md
+++ b/qualcomm-software/docs/user.md
@@ -24,3 +24,30 @@ supported include:
 * RTTI
 
 If variants with exceptions and RTTI enabled are required, please file an issue.
+
+## Multilib
+CPULLVM automatically selects a set of headers and runtime libraries to use when compiling and linking based on
+the set of arguments passed on the command line. A warning will be emitted if no appropriate set of headers/libraries
+can be found.
+
+When compiling and linking, you should provide at least the following options on the command line:
+* The target triple (ex: `--target=riscv32-unknown-elf`)
+* `-march`, `-mabi`, and `-mfpu`, if using non-default options and applicable to your target
+* Whether to use position independent code
+* Any additional options like sanitizers or `-mbranch-protection`
+
+Additionally, CPULLVM implements custom multilib flags to allow selecting variants that are not otherwise tied
+to normal compiler flags. These are specified by `-fmultilib-flag=<flag>`. Currently implemented flags include:
+* **`threads`/`nothreads`**: Picolibc only. When `threads` is set, a variant with [`thread-local-storage`](https://github.com/picolibc/picolibc/blob/ce4e736ebef081d13a81a29b6cfb51335f6f890d/doc/build.md#thread-local-storage-options) enabled,
+[`single-thread`](https://github.com/picolibc/picolibc/blob/ce4e736ebef081d13a81a29b6cfb51335f6f890d/doc/build.md#locking-options) disabled,
+and [`atomic-ungetc`](https://github.com/picolibc/picolibc/blob/ce4e736ebef081d13a81a29b6cfb51335f6f890d/doc/build.md#locking-options) enabled is selected. `nothreads` selects a variant with the inverse. `threads` is default.
+
+To display all available multilibs run clang with the flag `-print-multi-lib` and an appropriate target triple.
+
+To display the directory selected by the multilib system, add the flag `-print-multi-directory` to your clang command line options.
+
+> [!WARNING]
+> Using `--sysroot` to select a variant or hardcoding paths to variants should generally not be done.
+> Please file an issue if you find that this is needed.
+>
+> Variant names and paths may change at any time without notice.