diff --git a/README.md b/README.md
index 4da262e..448f69c 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,10 @@ the Bash login sequence.
 - Configure Bash history, prompt rendering, completion and command-not-found
   behaviour.
 - Initialize Bash integrations such as NVM, Pyenv, z.lua and gitstatus.
+- Own interactive aliases, functions and their curated command catalogue.
+- Isolate Arch-specific interactive commands from general Bash configuration.
 - Display the startup greeting and cached package status.
 - Display `TODO.md` and `.autonote.md` after successful directory changes.
-- Load common interactive aliases from the `profile` repository.
 
 ## Boundaries
 
@@ -20,8 +21,6 @@ This repository does not own:
 
 - Portable login environment variables or shared PATH construction. Those
   belong in the `profile` repository.
-- Common aliases intended for more than one Bourne-family shell. Those load
-  through `profile/interactive.sh`; genuinely Bash-specific aliases live here.
 - User services, timers or background refresh logic. Those belong in the
   `systemd` repository. Bash may consume their cached output or request a
   non-blocking service start.
@@ -44,7 +43,16 @@ shell is not interactive.
 - `bash_profile`: connects Bash login startup to the shared profile and Bash RC.
 - `bashrc`: interactive guard and ordered module loader.
 - `bashrc.d/`: numbered interactive Bash modules; lower numbers load first.
-- `aliases.bash`: Bash-specific and warning-only transition aliases.
+- `interactive.sh`: loads interactive aliases, functions and reminders.
+- `aliases.sh`: general interactive aliases and functions, written portably.
+- `aliases.bash`: aliases requiring Bash-specific naming or behaviour.
+- `commands.sh`: command-catalogue display and validation functions.
+- `commands.tsv`: curated command descriptions and reminder visibility.
+- `commands.README.md`: format and maintenance instructions for the catalogue.
+- `hosts.sh`: SSH destination listing function.
+- `memory.tsv`: curated daily shell-memory questions and answers.
+- `memory.README.md`: memory-bank format and selection behaviour.
+- `platform/arch.sh`: Arch-specific applications and system integration.
 - `gitstatus-custom.sh`: prompt integration for gitstatus.
 - `cheat.bash`: completion for `cheat`.
 - `install.sh`: installs the home-directory symlinks and gitstatus dependency.
@@ -59,7 +67,7 @@ The loader sources every readable `bashrc.d/*.bash` file in lexical order:
 - `00-core.bash`: colors, history, terminal and Readline settings.
 - `10-prompt.bash`: prompt, gitstatus and per-command history flushing.
 - `20-greeting.bash`: calendar-day greeting and adjective selection.
-- `30-integrations.bash`: shared aliases, NVM and z.lua.
+- `30-integrations.bash`: interactive commands, NVM and z.lua.
 - `40-status.bash`: command reminders, memory and cached package status.
 - `50-completions.bash`: command-specific completion setup.
 - `60-directory-notes.bash`: `TODO.md` and `.autonote.md` display after `cd`.
@@ -78,5 +86,5 @@ local package transaction, Bash requests a non-blocking start of
 `package-status-refresh.service`, subject to a five-minute retry backoff.
 
 The refresh service and 30-minute timer are owned and documented by the
-`systemd` repository. The Arch `update` wrapper in the `profile` repository
-also requests a refresh after a successful upgrade.
+`systemd` repository. The Arch `update` wrapper in this repository also
+requests a refresh after a successful upgrade.
diff --git a/aliases.sh b/aliases.sh
new file mode 100644
index 0000000..c52bc32
--- /dev/null
+++ b/aliases.sh
@@ -0,0 +1,79 @@
+#!/bin/sh
+
+# Interactive aliases and helpers written with portable shell syntax.
+
+alias venv='. ./venv/bin/activate'
+
+alias e='nvim'
+alias er='nvim README.md'
+alias et='nvim TODO.md'
+alias en='nvim NOTES.md'
+alias ens='nvim NEXT_STEPS.md'
+alias ea='nvim .autonote.md'
+alias ee='nvim .'
+
+debuglog() {
+	clear
+	: > debug.log
+	tail -f debug.log
+}
+
+alias g='git status'
+
+gg() {
+	_gg_message=${*:-update}
+	if git add . && git commit -m "$_gg_message" && git push; then
+		unset _gg_message
+		return 0
+	fi
+
+	unset _gg_message
+	return 1
+}
+
+wget() {
+	printf 'wget wrapper: using HSTS file %s\n' "$XDG_DATA_HOME/wget-hsts" >&2
+	command wget --hsts-file="$XDG_DATA_HOME/wget-hsts" "$@"
+}
+
+alias bc='bc -q -l'
+
+alias ytdl='yt-dlp --write-info-json --write-description --no-playlist'
+alias ytdlb='yt-dlp --write-info-json --write-description --no-playlist -a'
+alias ytdl-mp3='yt-dlp -f bestaudio --extract-audio --audio-format mp3 --embed-thumbnail --add-metadata'
+
+# lf gets confused by TERMINFO when running in tmux.
+# https://github.com/gokcehan/lf/issues/138#issuecomment-464477665
+if [ -n "${TERMINFO:-}" ]; then
+	alias lf='TERMINFO= lf -last-dir-path="$HOME/.cache/lf-last-dir"'
+else
+	alias lf='lf -last-dir-path="$HOME/.cache/lf-last-dir"'
+fi
+
+cdlf() {
+	[ -r "$HOME/.cache/lf-last-dir" ] || return 1
+	IFS= read -r _cdlf_last_dir < "$HOME/.cache/lf-last-dir"
+	[ -n "$_cdlf_last_dir" ] || return 1
+
+	if cd "$_cdlf_last_dir"; then
+		unset _cdlf_last_dir
+		return 0
+	fi
+
+	unset _cdlf_last_dir
+	return 1
+}
+
+lfcd() {
+	lf -last-dir-path="$HOME/.cache/lf-last-dir" && cdlf
+}
+
+mkcd() {
+	if [ "$#" -ne 1 ]; then
+		printf '%s\n' 'Usage: mkcd <directory>' >&2
+		return 2
+	fi
+
+	mkdir -p "$1" || return
+	cd "$1" || return
+}
diff --git a/bashrc.d/30-integrations.bash b/bashrc.d/30-integrations.bash
index d950672..1308e1b 100644
--- a/bashrc.d/30-integrations.bash
+++ b/bashrc.d/30-integrations.bash
@@ -1,7 +1,9 @@
 # shellcheck shell=bash
 
-[ -r "$HOME/.config/profile/interactive.sh" ] && . "$HOME/.config/profile/interactive.sh"
-[ -r "$HOME/.config/bash/aliases.bash" ] && . "$HOME/.config/bash/aliases.bash"
+_bash_config_home=${XDG_CONFIG_HOME:-$HOME/.config}/bash
+[ -r "$_bash_config_home/interactive.sh" ] && . "$_bash_config_home/interactive.sh"
+[ -r "$_bash_config_home/aliases.bash" ] && . "$_bash_config_home/aliases.bash"
+unset _bash_config_home
 
 export NVM_DIR="$HOME/.nvm"
 if [[ -s "$NVM_DIR/nvm.sh" ]]; then
diff --git a/bashrc.d/90-memory-question.bash b/bashrc.d/90-memory-question.bash
index 0db6e4b..5a1c660 100644
--- a/bashrc.d/90-memory-question.bash
+++ b/bashrc.d/90-memory-question.bash
@@ -1,6 +1,6 @@
 # shellcheck shell=bash
 
-_memory_file="${XDG_CONFIG_HOME:-$HOME/.config}/profile/memory.tsv"
+_memory_file="${XDG_CONFIG_HOME:-$HOME/.config}/bash/memory.tsv"
 _memory_question_color='\033[38;5;11m'
 _memory_names=()
 _memory_questions=()
diff --git a/commands.README.md b/commands.README.md
new file mode 100644
index 0000000..e07f160
--- /dev/null
+++ b/commands.README.md
@@ -0,0 +1,23 @@
+# Command reminders
+
+`commands.tsv` is the manually curated source for Bash's command reminder.
+It is not an inventory of every installed executable.
+
+Each non-empty line contains three tab-separated fields:
+
+```text
+reminder	command	description
+```
+
+- `reminder` must be `yes` or `no`. `yes` includes the command in the shell
+  reminder; `no` keeps it available only in the full listing.
+- `command` is the name entered at the shell.
+- `description` is a brief explanation displayed by `commands`.
+
+The data file deliberately has no header or comments. Blank lines are allowed;
+put explanatory material in this README instead. Duplicate commands, unknown
+reminder values and malformed rows are reported as errors.
+
+Run `commands` to display every entry. To add or remove something from the
+shell reminder, edit only its `reminder` field; do not duplicate the command
+list in shell configuration.
diff --git a/commands.sh b/commands.sh
new file mode 100644
index 0000000..bf4a145
--- /dev/null
+++ b/commands.sh
@@ -0,0 +1,68 @@
+#!/bin/sh
+
+# Display and validate the curated command catalogue.
+
+commands() {
+	awk -F '\t' '
+		NF == 0 { next }
+		NF != 3 || ($1 != "yes" && $1 != "no") || $2 == "" || $3 == "" {
+			printf "Invalid command reminder on line %d.\n", NR > "/dev/stderr"
+			invalid = 1
+			next
+		}
+		seen[$2]++ {
+			printf "Duplicate command reminder for %s on line %d.\n", $2, NR > "/dev/stderr"
+			invalid = 1
+			next
+		}
+		{
+			count++
+			reminder[count] = $1
+			command[count] = $2
+			description[count] = $3
+			if (length($2) > command_width) command_width = length($2)
+			if (length($3) > description_width) description_width = length($3)
+		}
+		END {
+			if (invalid) exit 1
+			if (length("COMMAND") > command_width) command_width = length("COMMAND")
+			if (length("DESCRIPTION") > description_width) description_width = length("DESCRIPTION")
+			printf "%-*s  %-*s  %s\n", command_width, "COMMAND", description_width, "DESCRIPTION", "REMINDER"
+			for (row = 1; row <= count; row++) {
+				printf "%-*s  %-*s  %s\n", command_width, command[row], description_width, description[row], reminder[row]
+			}
+		}
+	' "${XDG_CONFIG_HOME:-$HOME/.config}/bash/commands.tsv"
+}
+
+_command_reminder() {
+	awk -F '\t' -v width="${COLUMNS:-80}" '
+		NF == 0 { next }
+		NF != 3 || ($1 != "yes" && $1 != "no") || $2 == "" || $3 == "" {
+			printf "Invalid command reminder on line %d.\n", NR > "/dev/stderr"
+			invalid = 1
+			next
+		}
+		seen[$2]++ {
+			printf "Duplicate command reminder for %s on line %d.\n", $2, NR > "/dev/stderr"
+			invalid = 1
+			next
+		}
+		$1 == "yes" { command[++count] = $2 }
+		END {
+			if (invalid) exit 1
+			if (width < 40) width = 80
+			line = "  "
+			for (row = 1; row <= count; row++) {
+				separator = (line == "  " ? "" : " ")
+				if (length(line) + length(separator) + length(command[row]) > width) {
+					print line
+					line = "  " command[row]
+				} else {
+					line = line separator command[row]
+				}
+			}
+			if (line != "  ") print line
+		}
+	' "${XDG_CONFIG_HOME:-$HOME/.config}/bash/commands.tsv"
+}
diff --git a/commands.tsv b/commands.tsv
new file mode 100644
index 0000000..d50c3c6
--- /dev/null
+++ b/commands.tsv
@@ -0,0 +1,16 @@
+yes	nap	snippet manager
+yes	hyprpicker	Wayland colour picker
+yes	nmcli	NetworkManager command-line client
+yes	lftp	file-transfer client
+yes	lxc-wp	create a local WordPress LXC project
+yes	qv4l2	Video4Linux control panel
+no	cheat	command-line cheatsheets
+no	vimv	batch rename files in Vim
+yes	rclone	sync files with cloud storage
+yes	zathura	document viewer
+yes	tesseract	optical character recognition
+yes	remmina	remote desktop client
+yes	wl-copy	copy to the Wayland clipboard
+yes	wl-paste	paste from the Wayland clipboard
+yes	hosts	list SSH destinations
+yes	commands	list remembered commands and descriptions
diff --git a/hosts.sh b/hosts.sh
new file mode 100644
index 0000000..441be02
--- /dev/null
+++ b/hosts.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+# List the concrete destinations defined by the user's SSH configuration.
+
+hosts() {
+	if [ ! -r "$HOME/.ssh/config.d/hosts.conf" ]; then
+		printf '%s\n' 'SSH host configuration is unavailable.' >&2
+		return 1
+	fi
+
+	awk '
+		tolower($1) == "host" {
+			for (field = 2; field <= NF; field++) {
+				if ($field !~ /[*?!]/) print $field
+			}
+		}
+	' "$HOME/.ssh/config.d/hosts.conf"
+}
diff --git a/interactive.sh b/interactive.sh
new file mode 100644
index 0000000..4a626d5
--- /dev/null
+++ b/interactive.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# Interactive Bash setup assembled from focused, mostly portable files.
+
+_bash_interactive_dir=${XDG_CONFIG_HOME:-$HOME/.config}/bash
+
+. "$_bash_interactive_dir/aliases.sh"
+. "$_bash_interactive_dir/commands.sh"
+. "$_bash_interactive_dir/hosts.sh"
+
+if [ -r /etc/arch-release ]; then
+	. "$_bash_interactive_dir/platform/arch.sh"
+fi
+
+printf '%s\n' 'Remember aliases:'
+printf '\033[1;37m%s\n' '  et en ens ee'
+printf '%s\n' '  dusort debuglog mkcd'
+printf '\033[0m\n\n'
+
+unset _bash_interactive_dir
diff --git a/memory.README.md b/memory.README.md
new file mode 100644
index 0000000..addc974
--- /dev/null
+++ b/memory.README.md
@@ -0,0 +1,23 @@
+# Shell memory questions
+
+`memory.tsv` is a selectively curated question-and-answer bank for reinforcing
+useful Bash commands. It deliberately excludes internal functions, standard
+command overrides and deprecated transition aliases.
+
+Each non-empty line contains three tab-separated fields:
+
+```text
+name	question	answer
+```
+
+- `name` is a unique stable identifier, normally the command or alias name.
+- `question` is displayed on shell startup.
+- `answer` is displayed by running `answerpls` in that terminal.
+
+The file has no header or comments. Empty fields, duplicate names and malformed
+rows are errors.
+
+Bash selects one entry deterministically from the local calendar date. Every
+terminal opened on the same day therefore shows the same question without
+requiring a state file. Editing the bank may change which question maps to a
+given date.
diff --git a/memory.tsv b/memory.tsv
new file mode 100644
index 0000000..8617f4e
--- /dev/null
+++ b/memory.tsv
@@ -0,0 +1,23 @@
+nap	What do you use as a snippet manager?	nap
+hyprpicker	What do you use as a colour picker?	hyprpicker
+nmcli	What manages NetworkManager from the terminal?	nmcli
+lftp	What do you use for interactive file transfers?	lftp
+lxc-wp	What creates a local WordPress LXC project?	lxc-wp
+qv4l2	What opens the Video4Linux control panel?	qv4l2
+cheat	What displays command-line cheatsheets?	cheat
+vimv	What lets you batch rename files in Vim?	vimv
+rclone	What synchronizes files with cloud storage?	rclone
+zathura	What lightweight application opens documents?	zathura
+tesseract	What performs optical character recognition?	tesseract
+remmina	What opens remote desktop connections?	remmina
+wl-copy	What copies text to the Wayland clipboard?	wl-copy
+wl-paste	What pastes text from the Wayland clipboard?	wl-paste
+hosts	What lists your configured SSH destinations?	hosts
+commands	What lists remembered commands and their descriptions?	commands
+et	What opens TODO.md for editing?	et
+en	What opens NOTES.md for editing?	en
+ens	What opens NEXT_STEPS.md for editing?	ens
+ee	What opens the current directory in Neovim?	ee
+dusort	What displays disk usage sorted by size?	dusort [path]
+debuglog	What clears and follows debug.log?	debuglog
+mkcd	What creates a directory and enters it?	mkcd <directory>
diff --git a/platform/arch.sh b/platform/arch.sh
new file mode 100644
index 0000000..7a7a6ff
--- /dev/null
+++ b/platform/arch.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# Interactive Bash commands specific to this Arch Linux workstation.
+
+_ARCH_GREEN='\033[0;32m'
+_ARCH_BLUE='\033[0;34m'
+_ARCH_NC='\033[0m'
+
+alias backup='sudo borgmatic create --verbosity 1 --files'
+alias cs='lxc list -c ns4b,user.comment:comment'
+
+pc() {
+	nohup pcmanfm . >/dev/null 2>&1 &
+}
+
+# Expand aliases for commands following sudo.
+alias sudo='sudo '
+
+alias speak='/usr/local/src/kokora/speak'
+
+alias ls='LC_COLLATE=C ls --color=auto -h --group-directories-first --time-style=+"%d.%m.%Y %H:%M" -F'
+alias cp='cp -irv'
+alias mkdir='mkdir -vp'
+alias mv='mv -iv'
+alias rm='rm -dv'
+alias grep='grep --colour=auto'
+
+dusort() {
+	if [ "$#" -gt 1 ]; then
+		printf '%s\n' 'Usage: dusort [path]' >&2
+		return 2
+	fi
+
+	_dusort_path=${1:-.}
+	if [ ! -e "$_dusort_path" ]; then
+		printf 'dusort: path does not exist: %s\n' "$_dusort_path" >&2
+		unset _dusort_path
+		return 1
+	fi
+
+	if sudo du -h -d 2 -- "$_dusort_path" | sort -h; then
+		unset _dusort_path
+		return 0
+	fi
+
+	unset _dusort_path
+	return 1
+}
+
+update() {
+	printf 'Executing "%bpacman -Syu%b" via "%barchnews_wrap%b" wrapper\n' \
+		"$_ARCH_GREEN" "$_ARCH_NC" "$_ARCH_BLUE" "$_ARCH_NC"
+
+	sudo "$HOME/.src/archnews/archnews_wrap" -Syu || return
+	systemctl --user start --no-block package-status-refresh.service >/dev/null 2>&1 || true
+}