Bug fixes and package updates.

README.md

@@ -23,9 +23,10 @@ AI-assisted contributions are welcome. Contributors remain responsible for human
 
 ## Building
 
-Run `./build-cthulhu.sh` to build `cthulhu` and `cthulhu-braille` in the
-checkout root. The script works from any directory. It uses Go's automatic
-toolchain selection with Go 1.21 or newer. If Go is missing or older, it
+Run `./build-cthulhu.sh` to build `cthulhu`, `cthulhu-braille`, and
+`cthulhu-input-helper` in the checkout root. The script works from any
+directory. It uses Go's automatic toolchain selection with Go 1.21 or newer.
+If Go is missing or older, it
 downloads the version required by `go.mod`, verifies the archive's SHA-256,
 and caches it under `${XDG_CACHE_HOME:-$HOME/.cache}/cthulhu/toolchains`.
 It does not replace system Go or require root.
@@ -38,7 +39,7 @@ Bootstrapping Go additionally needs `curl`, `tar`, and `sha256sum`.
 See [Contributing](CONTRIBUTING.md#development-and-architecture) and the
 Arch package recipes under `distro-packages/Arch-Linux/` for dependencies.
 
-For packaging, put both binaries in a separate directory and pass build flags
+For packaging, put all three binaries in a separate directory and pass build flags
 after `--`:
 
 ```sh
@@ -58,6 +59,7 @@ that must use an installed toolchain:
 GOTOOLCHAIN=local GOPROXY=off ./build-cthulhu.sh --output-dir build -- -mod=readonly
 install -Dm755 build/cthulhu "$pkgdir/usr/bin/cthulhu"
 install -Dm755 build/cthulhu-braille "$pkgdir/usr/bin/cthulhu-braille"
+install -Dm755 build/cthulhu-input-helper "$pkgdir/usr/bin/cthulhu-input-helper"
 ```
 
 For offline builds, provision a suitable Go version and module cache in
@@ -65,6 +67,12 @@ advance. Build inside the target distribution to link against its native
 libraries; downloading Go does not supply those libraries. `--help` lists
 the script's options without checking dependencies or accessing the network.
 
+Keep all three executables together when installing or using a custom launch
+script. `cthulhu-input-helper` receives remote keyboard input on Xorg. Without
+it, Cthulhu can control another computer, but cannot accept its keyboard input.
+The October 2026 release predates this helper and incoming Remote keyboard
+support; packaging that release cannot enable the newer feature.
+
 ## Start with the laptop keyboard layout
 
 Run `cthulhu -l` to use the laptop layout with Caps Lock as the Cthulhu