diff --git a/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/config.h b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/config.h
new file mode 100644
index 000000000000..0fa53c2d6786
--- /dev/null
+++ b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/config.h
@@ -0,0 +1,45 @@
+/* Copyright 2023 @PoweredByPorridge
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+#define AUTO_SHIFT_TIMEOUT 210
+
+#define NO_AUTO_SHIFT_NUMERIC
+// #define NO_AUTO_SHIFT_SPECIAL
+
+// retro shift is auto shift on home row mods
+// I no longer use home row mods, but do find this setting helps
+// avoid 'fat fingered' keypresses.
+
+// If RETRO_SHIFT is defined to a value, hold times greater
+// than that value will not produce a tap on release. This enables
+// modifiers to be held for combining with mouse clicks without
+// generating taps on release.
+#define RETRO_SHIFT 425
+
+// can also be defined without a value
+// #define RETRO_SHIFT
+
+// Configure the global tapping term (default: 200ms)
+// Lower than 210 and I can't tap dance brackets without a run up.
+#define TAPPING_TERM 210
+
+#define TAPPING_TERM_PER_KEY
+
+// Apply the modifier on keys that are tapped during a short hold of a modtap
+// Prevents slurred typing (of home row mods)
+#define PERMISSIVE_HOLD
diff --git a/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/keymap.c b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/keymap.c
new file mode 100644
index 000000000000..40c8b0b5aadf
--- /dev/null
+++ b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/keymap.c
@@ -0,0 +1,224 @@
+/* Copyright 2023 @PoweredByPorridge
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include QMK_KEYBOARD_H
+
+// Tap Dance keycodes
+enum td_keycodes {
+ L_BRAX, // Used in the keymap, add additional keycodes for each tapdance.
+ R_BRAX,
+ QUOTS,
+ TACHE
+};
+
+// Define a type containing as many tapdance states as you need
+typedef enum {
+ SINGLE_TAP,
+ DOUBLE_TAP, // SINGLE_HOLD,
+ TRIPLE_TAP // DOUBLE_SINGLE_TAP
+} td_state_t;
+
+// Create a global instance of the tapdance state type
+static td_state_t td_state;
+
+// Declare your tapdance functions:
+
+// Function to determine the current tapdance state
+uint8_t cur_dance(tap_dance_state_t *state);
+
+// `finished` and `reset` functions for each tapdance keycode
+void lbrax_finished(tap_dance_state_t *state, void *user_data);
+void lbrax_reset(tap_dance_state_t *state, void *user_data);
+
+void rbrax_finished(tap_dance_state_t *state, void *user_data);
+void rbrax_reset(tap_dance_state_t *state, void *user_data);
+
+void quots_finished(tap_dance_state_t *state, void *user_data);
+void quots_reset(tap_dance_state_t *state, void *user_data);
+
+void tache_finished(tap_dance_state_t *state, void *user_data);
+void tache_reset(tap_dance_state_t *state, void *user_data);
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [0] = LAYOUT(KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P,
+ KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN,
+ KC_Z, KC_X, KC_C, KC_V, KC_B, KC_NUBS, KC_SLSH, KC_N, KC_M, KC_COMM, KC_DOT, KC_ENT,
+ LCTL_T(KC_ESC), KC_LALT, KC_LGUI, KC_LSFT, MO(1), KC_SPC, KC_SPC, MO(2), TD(QUOTS), KC_RSFT, KC_LALT, LCTL_T(KC_TAB)),
+
+ [1] = LAYOUT(KC_EXLM, KC_DQUO, LSFT(KC_3), KC_DLR, KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_DEL, KC_BSPC,
+ KC_F24, LALT(KC_F3), KC_NO, KC_NO, TD(L_BRAX), TD(R_BRAX), KC_LEFT, KC_DOWN, KC_UP, KC_RGHT,
+ LCTL(KC_F12), LALT(KC_X), KC_NO, KC_NO, KC_NO, TD(QUOTS), TD(TACHE), KC_MINS, KC_EQL, KC_COMM, KC_DOT, KC_ENT,
+ KC_TRNS, KC_NO, KC_NO, MO(3), KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, LSFT(KC_TAB)),
+
+ [2] = LAYOUT(KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0,
+ KC_NO, LALT(KC_F3), KC_NO, KC_NO, TD(L_BRAX), TD(R_BRAX), KC_HOME, KC_PGDN, KC_PGUP, KC_END,
+ LCTL(KC_F12), LALT(KC_X), KC_NO, KC_NO, KC_NO, TD(QUOTS), TD(TACHE), KC_MINS, KC_EQL, KC_COMM, KC_DOT, KC_NO,
+ KC_TRNS, KC_NO, KC_NO, KC_NO, MO(3), KC_NO, KC_NO, KC_NO, MO(3), KC_NO, KC_NO, KC_TRNS),
+
+ [3] = LAYOUT(KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10,
+ AS_TOGG, KC_F24, KC_NO, KC_NO, KC_NO, KC_NO, LSA(KC_LEFT), LSA(KC_DOWN), LSA(KC_UP), LSA(KC_RGHT),
+ KC_LCTL, LALT(KC_DEL),KC_NO, KC_NO, KC_NO, KC_NO, KC_VOLU, KC_NO, KC_F12, KC_F13, KC_F14, KC_NO,
+ KC_TRNS, KC_F23, KC_LCTL, KC_NO, KC_TRNS, KC_NO, KC_VOLD, KC_MPLY, KC_LSFT, KC_NO, KC_NO, KC_TRNS)
+};
+
+/*
+Notes on keys
+or, why on earth do I have keymap
+lower-shift-z is CTRL-F12 - Darkroom mode in emacs
+lower-x is ALT-X - emacs
+layer3-a is toggle autoshift
+layer3-s is F24 - i3 controls popup reminder
+lower-s is ALT-F3 - multi-select in Sublime text
+*/
+
+
+// Determine the tapdance state to return
+uint8_t cur_dance(tap_dance_state_t *state) {
+ if (state->count == 1) {
+ return SINGLE_TAP;
+ } else if (state->count == 2) {
+ return DOUBLE_TAP;
+ } else if (state->count == 3) {
+ return TRIPLE_TAP;
+ } else {
+ reset_tap_dance (state);
+ return 3;
+ }
+}
+
+
+// Handle the possible states for each tapdance keycode you define:
+
+void lbrax_finished(tap_dance_state_t *state, void *user_data) {
+ td_state = cur_dance(state);
+ switch (td_state) {
+ case SINGLE_TAP:
+ register_code16(LSFT(KC_9));
+ break;
+ case DOUBLE_TAP:
+ register_code16(KC_LBRC);
+ break;
+ case TRIPLE_TAP:
+ register_code16(LSFT(KC_LBRC));
+ }
+}
+
+void lbrax_reset(tap_dance_state_t *state, void *user_data) {
+ switch (td_state) {
+ case SINGLE_TAP:
+ unregister_code16(LSFT(KC_9));
+ break;
+ case DOUBLE_TAP:
+ unregister_code16(KC_LBRC);
+ break;
+ case TRIPLE_TAP:
+ unregister_code16(LSFT(KC_LBRC));
+ }
+}
+
+// Handle the possible states for each tapdance keycode you define:
+
+void rbrax_finished(tap_dance_state_t *state, void *user_data) {
+ td_state = cur_dance(state);
+ switch (td_state) {
+ case SINGLE_TAP:
+ register_code16(LSFT(KC_0));
+ break;
+ case DOUBLE_TAP:
+ register_code16(KC_RBRC);
+ break;
+ case TRIPLE_TAP:
+ register_code16(LSFT(KC_RBRC));
+ }
+}
+
+
+void rbrax_reset(tap_dance_state_t *state, void *user_data) {
+ switch (td_state) {
+ case SINGLE_TAP:
+ unregister_code16(LSFT(KC_0));
+ break;
+ case DOUBLE_TAP:
+ unregister_code16(KC_RBRC);
+ break;
+ case TRIPLE_TAP:
+ unregister_code16(LSFT(KC_RBRC));
+ }
+}
+
+void quots_finished(tap_dance_state_t *state, void *user_data) {
+ td_state = cur_dance(state);
+ switch (td_state) {
+ case SINGLE_TAP:
+ register_code16(KC_QUOT);
+ break;
+ case DOUBLE_TAP:
+ register_code16(KC_AT);
+ break;
+ case TRIPLE_TAP:
+ register_code16(KC_DQUO);
+ }
+}
+
+void quots_reset(tap_dance_state_t *state, void *user_data) {
+ switch (td_state) {
+ case SINGLE_TAP:
+ unregister_code16(KC_QUOT);
+ break;
+ case DOUBLE_TAP:
+ unregister_code16(KC_AT);
+ break;
+ case TRIPLE_TAP:
+ unregister_code16(KC_DQUO);
+ }
+}
+
+void tache_finished(tap_dance_state_t *state, void *user_data) {
+ td_state = cur_dance(state);
+ switch (td_state) {
+ case SINGLE_TAP:
+ register_code16(KC_NUHS);
+ break;
+ case DOUBLE_TAP:
+
+ register_code16(LSFT(KC_NUHS));
+ break;
+ case TRIPLE_TAP:
+ register_code16(KC_GRV);
+ }
+}
+
+void tache_reset(tap_dance_state_t *state, void *user_data) {
+ switch (td_state) {
+ case SINGLE_TAP:
+ unregister_code16(KC_NUHS);
+ break;
+ case DOUBLE_TAP:
+ unregister_code16(LSFT(KC_NUHS));
+ break;
+ case TRIPLE_TAP:
+ unregister_code16(KC_GRV);
+ }
+}
+
+// Define `ACTION_TAP_DANCE_FN_ADVANCED()` for each tapdance keycode, passing in `finished` and `reset` functions
+
+tap_dance_action_t tap_dance_actions[] = {
+ [L_BRAX] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, lbrax_finished, lbrax_reset),
+ [R_BRAX] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, rbrax_finished, rbrax_reset),
+ [QUOTS] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, quots_finished, quots_reset),
+ [TACHE] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, tache_finished, tache_reset)
+};
diff --git a/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/readme.md b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/readme.md
new file mode 100644
index 000000000000..619654186deb
--- /dev/null
+++ b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/readme.md
@@ -0,0 +1,35 @@
+# Keyboardio Atreus with an SLF layout from PoweredByPorridge
+
+SLF stands for [Stiff Little Fingers](https://en.wikipedia.org/wiki/Stiff_Little_Fingers) who were a great punk band from Belfast, Northern Ireland. Stiff Little Fingers is also a good way of describing my hands, a condition which I ascribe to too many winters cycling without gloves. So, I need a keyboard and layout to cope.
+
+I use a Keyboardio Atreus, in fact, they're so good, I use two. I tried all sorts of layouts, and finally came up with the one that suits my stiff fingers.
+
+It has four layers:
+
+0 - Normal - letters and punctuation.
+
+
+
+1 - Symbols (shifted numbers), arrow keys, assorted function keys, Del and Backspace.
+
+
+
+2 - Numbers, page up, page down, home, and end. Similar assorted functions.
+
+
+
+3 - F1 to F14, play/pause, volume up/down, Left-shift-Alt left, right, up, down.
+
+
+
+Autoshift is important, I use it all the time.
+
+I use tap dance (one, two, or three key presses) for:
+
+* Braces, brackets, and curly brackets. TD(L_BRAX) and TD(R_BRAX)
+* Hash (pound), tilde, and backtick. TD(TACHE)
+* Single quote, double quote, and @. TD(QUOTS)
+
+There are odd keys that are there for a particular reason:
+* F24 - my [I3](https://i3wm.org/) popup to remind me of stuff I always forget.
+* Alt-shift-left/right/up/down - multi-select in Sublime text.
\ No newline at end of file
diff --git a/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/rules.mk b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/rules.mk
new file mode 100644
index 000000000000..3285414f97d2
--- /dev/null
+++ b/keyboards/keyboardio/atreus/keymaps/poweredbyporridge/rules.mk
@@ -0,0 +1,7 @@
+BOOTMAGIC_ENABLE = no
+MOUSEKEY_ENABLE = no
+CONSOLE_ENABLE = no
+COMMAND_ENABLE = no
+UNICODE_ENABLE = no
+AUTO_SHIFT_ENABLE = yes
+TAP_DANCE_ENABLE = yes