diff --git a/bash/.bashrc b/bash/.bashrc
new file mode 100644
index 0000000..5b3746c
--- /dev/null
+++ b/bash/.bashrc
@@ -0,0 +1,21 @@
+# ~/.bashrc
+
+[[ $- != *i* ]] && return
+
+BASH_CONFIG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/bash"
+
+for config in \
+    env \
+    aliases \
+    build \
+    perf \
+    systemd \
+    tools
+do
+    file="$BASH_CONFIG_DIR/$config.bash"
+    [[ -r "$file" ]] && source "$file"
+done
+
+# Machine/private configuration.
+[[ -r "$BASH_CONFIG_DIR/local.bash" ]] &&
+    source "$BASH_CONFIG_DIR/local.bash"
diff --git a/bash/aliases.bash b/bash/aliases.bash
new file mode 100644
index 0000000..0d556ec
--- /dev/null
+++ b/bash/aliases.bash
@@ -0,0 +1,20 @@
+if command -v eza &>/dev/null; then
+    alias ls='eza -1 --icons'
+    alias ll='eza -la --icons'
+    alias la='eza -a --icons'
+    alias l='eza --icons'
+else
+    alias ll='ls -alF'
+    alias la='ls -A'
+    alias l='ls -CF'
+fi
+
+alias lsf='ls -p | grep -v /'
+
+alias grep='grep --color=auto'
+alias fgrep='fgrep --color=auto'
+alias egrep='egrep --color=auto'
+
+alias alert='notify-send --urgency=low \
+    -i "$([ $? = 0 ] && echo terminal || echo error)" \
+    "$(history | tail -n1 | sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'
diff --git a/bash/build.bash b/bash/build.bash
new file mode 100644
index 0000000..68b9c0a
--- /dev/null
+++ b/bash/build.bash
@@ -0,0 +1,101 @@
+_builddir_for() {
+    case "$1" in
+        debug)
+            printf '%s\n' "${BUILDDIR_DEBUG:-builddir-debug}"
+            ;;
+        release)
+            printf '%s\n' "${BUILDDIR_RELEASE:-builddir-release}"
+            ;;
+        *)
+            echo "Unknown build type: $1" >&2
+            return 2
+            ;;
+    esac
+}
+
+_ensure_builddir() {
+    local type="$1"
+    local dir
+    local native_args=()
+
+    dir="$(_builddir_for "$type")" || return
+
+    if [[ -f native.ini ]]; then
+        native_args+=(--native-file native.ini)
+    fi
+
+    if [[ ! -f "$dir/meson-private/coredata.dat" ]]; then
+        echo "Configuring Meson $type build in '$dir'..." >&2
+
+        meson setup "$dir" \
+            --buildtype="$type" \
+            "${native_args[@]}" >&2 || return
+    fi
+
+    printf '%s\n' "$dir"
+}
+
+_nic() {
+    local type="$1"
+    shift
+
+    local dir
+    dir="$(_ensure_builddir "$type")" || return
+
+    ninja -C "$dir" "$@"
+}
+
+nic() {
+    _nic "${BUILD_TYPE:-debug}" "$@"
+}
+
+nic-debug() {
+    _nic debug "$@"
+}
+
+nic-release() {
+    _nic release "$@"
+}
+
+nit() {
+    if (($# == 0)); then
+        echo "usage: nit <target> [args...]" >&2
+        return 2
+    fi
+
+    local target="$1"
+    local type="${BUILD_TYPE:-debug}"
+    local dir
+
+    shift
+
+    dir="$(_ensure_builddir "$type")" || return
+
+    ninja -C "$dir" "$target" || return
+    "$dir/$target" "$@"
+}
+
+nicc() {
+    if (($# == 0)); then
+        echo "usage: nicc <target> [ninja args...]" >&2
+        return 2
+    fi
+
+    local target="$1"
+    local type="${BUILD_TYPE:-debug}"
+    local dir
+    local filename
+
+    shift
+
+    dir="$(_ensure_builddir "$type")" || return
+    filename="${target##*/}"
+
+    ninja -C "$dir" "$target" "$@" || return
+
+    install -Dm755 \
+        "$dir/$target" \
+        "$HOME/.local/bin/$filename" || return
+
+    "$filename" --version
+}
diff --git a/bash/env.bash b/bash/env.bash
new file mode 100644
index 0000000..d7598cf
--- /dev/null
+++ b/bash/env.bash
@@ -0,0 +1,37 @@
+export TERM=xterm-256color
+
+path_prepend() {
+    [[ -d "$1" ]] || return
+    case ":$PATH:" in
+        *":$1:"*) ;;
+        *) PATH="$1:$PATH" ;;
+    esac
+}
+
+path_append() {
+    [[ -d "$1" ]] || return
+    case ":$PATH:" in
+        *":$1:"*) ;;
+        *) PATH="$PATH:$1" ;;
+    esac
+}
+
+path_prepend "$HOME/.local/bin"
+path_prepend "${GOBIN:-${GOPATH:-$HOME/go}/bin}"
+path_prepend "$HOME/.cargo/bin"
+path_prepend "$HOME/.ghcup/bin"
+path_prepend "$HOME/gitui"
+path_append "$HOME/Git/FlameGraph"
+path_append "$HOME/.fzf/bin"
+
+export PATH
+
+export FZF_DEFAULT_COMMAND='fd --type file'
+export FZF_CTRL_T_COMMAND="$FZF_DEFAULT_COMMAND"
+
+HISTCONTROL=ignoreboth
+HISTSIZE=10000
+HISTFILESIZE=20000
+
+shopt -s histappend
+shopt -s checkwinsize
diff --git a/bash/perf.bash b/bash/perf.bash
new file mode 100644
index 0000000..8bb7585
--- /dev/null
+++ b/bash/perf.bash
@@ -0,0 +1,35 @@
+alias perf-rec='perf record -g -e cpu-cycles -p'
+alias perf-rep='perf report'
+
+perf-dat() {
+    perf script | stackcollapse-perf.pl > "$1"
+}
+
+flamegraph() {
+    local perf_name="${1:-pdat}"
+
+    [[ -f perf.data ]] || {
+        echo "perf.data not found" >&2
+        return 1
+    }
+
+    mkdir -p img
+
+    perf-dat "$perf_name" &&
+        flamegraph.pl "$perf_name" > "img/$perf_name.svg"
+}
+
+flamegraph-diff() {
+    if [[ -f "$1" && -f "$2" ]]; then
+        mkdir -p img
+        difffolded.pl "$1" "$2" |
+            flamegraph.pl > "img/perf-diff-$1-$2.svg"
+    fi
+}
+
+binlog-dump() {
+    barsic dump \
+        --prefix="$1" \
+        --no-start-echo \
+        -- binlog-dumper --module "$2"
+}
diff --git a/bash/systemd.bash b/bash/systemd.bash
new file mode 100644
index 0000000..c05e71f
--- /dev/null
+++ b/bash/systemd.bash
@@ -0,0 +1,27 @@
+set-scope() {
+    local scope="${1:-default-scope}"
+
+    systemd-run \
+        --user \
+        --scope \
+        --unit="$scope" \
+        bash
+}
+
+check-scope() {
+    local scope="${1:-default-scope}"
+
+    systemctl --user status "$scope.scope"
+}
+
+shtop() {
+    local scope="${1:-default-scope.scope}"
+    local cg
+
+    cg=$(systemctl --user show \
+        "$scope" \
+        -p ControlGroup \
+        --value) || return
+
+    htop -p "$(paste -sd, "/sys/fs/cgroup${cg}/cgroup.procs")"
+}
diff --git a/bash/tools.bash b/bash/tools.bash
new file mode 100644
index 0000000..da78446
--- /dev/null
+++ b/bash/tools.bash
@@ -0,0 +1,34 @@
+# bash-completion
+if ! shopt -oq posix; then
+    if [[ -r /usr/share/bash-completion/bash_completion ]]; then
+        source /usr/share/bash-completion/bash_completion
+    elif [[ -r /etc/bash_completion ]]; then
+        source /etc/bash_completion
+    fi
+fi
+
+# ble.sh
+[[ -r "$HOME/.local/share/blesh/out/ble.sh" ]] &&
+    source "$HOME/.local/share/blesh/out/ble.sh"
+
+# NVM
+export NVM_DIR="$HOME/.nvm"
+
+[[ -s "$NVM_DIR/nvm.sh" ]] &&
+    source "$NVM_DIR/nvm.sh"
+
+[[ -s "$NVM_DIR/bash_completion" ]] &&
+    source "$NVM_DIR/bash_completion"
+
+# Shell integrations
+command -v starship &>/dev/null &&
+    eval "$(starship init bash)"
+
+command -v zoxide &>/dev/null &&
+    eval "$(zoxide init bash)"
+
+command -v atuin &>/dev/null &&
+    eval "$(atuin init bash)"
+
+command -v direnv &>/dev/null &&
+    eval "$(direnv hook bash)"