refactor tests

install-scripts/README.md

@@ -2,10 +2,10 @@
 
 This directory supplies the ready-made `python` and `dotnet` scripts. They are not reserved:
 modify, replace, or remove them like any other script. Place other trusted executable install
-scripts here and add the desired file names to `AGENTCI_INSTALL_SCRIPTS`. Compose mounts the
-directory read-only at `/etc/agentci/install-scripts`. Executable files run directly; files without
-executable mode run as POSIX shell scripts through `/bin/sh` so bind mounts do not depend on host
-file-mode preservation.
+scripts here and add the desired file names to `AGENTCI_INSTALL_SCRIPTS`. The Docker build copies
+this directory to `/etc/agentci/install-scripts`, so rebuild the image after changing its contents.
+Executable files run directly; files without executable mode run as POSIX shell scripts through
+`/bin/sh`.
 
 Scripts run from the cloned repository with a sanitized environment. They receive:
 
@@ -13,7 +13,7 @@ Scripts run from the cloned repository with a sanitized environment. They receiv
 - `PATH`: `$DEV_TOOLS_DIR/bin` followed by the service path
 - `PYTHON_VERSION` and `DOTNET_CHANNEL`: configured built-in runtime versions
 
-`DEV_TOOLS_DIR` is shared by jobs through the `agentci_data` volume. Put downloaded SDK/runtime
+`DEV_TOOLS_DIR` is shared by jobs through the `data/agentci` bind mount. Put downloaded SDK/runtime
 files beneath it and install command wrappers or symlinks into `$DEV_TOOLS_DIR/bin`; that `bin`
 directory is prepended to implementation agents' `PATH`. Environment changes made by a script do
 not persist into implementation turns.