diff --git a/bash/README.md b/bash/README.md
new file mode 100644
index 00000000..825e530c
--- /dev/null
+++ b/bash/README.md
@@ -0,0 +1,40 @@
+# Requirements
+
+`bash` and friends (`diff`, `grep`, `cat`)
+
+# (Failing) Unit Test
+
+```shell
+./unit_test.sh
+```
+
+# Texttest Fixture
+
+```shell
+./texttest_fixture.sh
+```
+
+Specify days:
+
+```shell
+./texttest_fixture.sh 30
+```
+
+Verify againt `ThirtyDays/stdout.gr`
+
+```shell
+./verify.sh
+```
+
+## BTW
+
+BTW, the script is a pure "function", so this works:
+
+```shell
+$ echo -e 'Aged Brie|3|5\nOther Item|4|5' |
+> ./gilded_rose.sh |
+> ./gilded_rose.sh |
+> ./gilded_rose.sh
+Aged Brie|0|8
+Other Item|1|2
+```
diff --git a/bash/gilded_rose.sh b/bash/gilded_rose.sh
new file mode 100755
index 00000000..4b723399
--- /dev/null
+++ b/bash/gilded_rose.sh
@@ -0,0 +1,58 @@
+#!/bin/bash
+
+update_quality() {
+    local IFS='|'
+
+    while read -r name sell_in quality; do
+        if [[ $name != "Aged Brie" && $name != "Backstage passes to a TAFKAL80ETC concert" ]]; then
+            if ((quality > 0)); then
+                if [[ $name != "Sulfuras, Hand of Ragnaros" ]]; then
+                    quality=$((quality - 1))
+                fi
+            fi
+        else
+            if ((quality < 50)); then
+                quality=$((quality + 1))
+
+                if [[ $name == "Backstage passes to a TAFKAL80ETC concert" ]]; then
+                    if ((sell_in < 11)); then
+                        if ((quality < 50)); then
+                            quality=$((quality + 1))
+                        fi
+                    fi
+                    if ((sell_in < 6)); then
+                        if ((quality < 50)); then
+                            quality=$((quality + 1))
+                        fi
+                    fi
+                fi
+            fi
+        fi
+
+        if [[ $name != "Sulfuras, Hand of Ragnaros" ]]; then
+            sell_in=$((sell_in - 1))
+        fi
+
+        if ((sell_in < 0)); then
+            if [[ $name != "Aged Brie" ]]; then
+                if [[ $name != "Backstage passes to a TAFKAL80ETC concert" ]]; then
+                    if ((quality > 0)); then
+                        if [[ $name != "Sulfuras, Hand of Ragnaros" ]]; then
+                            quality=$((quality - 1))
+                        fi
+                    fi
+                else
+                    quality=$((quality - quality))
+                fi
+            else
+                if ((quality < 50)); then
+                    quality=$((quality + 1))
+                fi
+            fi
+        fi
+
+        echo "$name|$sell_in|$quality"
+    done
+}
+
+update_quality
diff --git a/bash/texttest_fixture.sh b/bash/texttest_fixture.sh
new file mode 100755
index 00000000..690c9833
--- /dev/null
+++ b/bash/texttest_fixture.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+
+GILDED_ROSE_SCRIPT="./gilded_rose.sh"
+
+create_initial_items() {
+    local temp_file=$(mktemp)
+
+    cat <<EOF >"$temp_file"
++5 Dexterity Vest|10|20
+Aged Brie|2|0
+Elixir of the Mongoose|5|7
+Sulfuras, Hand of Ragnaros|0|80
+Sulfuras, Hand of Ragnaros|-1|80
+Backstage passes to a TAFKAL80ETC concert|15|20
+Backstage passes to a TAFKAL80ETC concert|10|49
+Backstage passes to a TAFKAL80ETC concert|5|49
+Conjured Mana Cake|3|6
+EOF
+
+    echo "$temp_file"
+}
+
+simulate_days() {
+    local days=$1
+    local items_file=$2
+
+    for ((day = 0; day <= days; day++)); do
+        echo "-------- day $day --------"
+        echo "name, sellIn, quality"
+
+        cat "$items_file" | sed 's/|/, /g'
+
+        local temp_output=$(mktemp)
+        cat "$items_file" | bash "$GILDED_ROSE_SCRIPT" >"$temp_output"
+        mv "$temp_output" "$items_file"
+
+        echo ""
+    done
+}
+
+echo OMGHAI!
+
+ITEMS_FILE=$(create_initial_items)
+
+DAYS_TO_SIMULATE=${1:-2}
+
+simulate_days $DAYS_TO_SIMULATE $ITEMS_FILE
+
+rm "$ITEMS_FILE"
diff --git a/bash/unit_test.sh b/bash/unit_test.sh
new file mode 100755
index 00000000..34cf29d8
--- /dev/null
+++ b/bash/unit_test.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+GILDED_ROSE_SCRIPT="./gilded_rose.sh"
+
+get_name() {
+    grep -o '^[^|]*'
+}
+
+assert_equals() {
+    local expected="$1"
+    diff -u - <(echo "$expected")
+}
+
+test_foo() {
+    echo "foo|0|0" |
+        bash "$GILDED_ROSE_SCRIPT" |
+        get_name |
+        assert_equals "fixme"
+}
+
+test_foo
diff --git a/bash/verify.sh b/bash/verify.sh
new file mode 100755
index 00000000..ad9d95e5
--- /dev/null
+++ b/bash/verify.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+./texttest_fixture.sh 30 |
+    diff -u - ../texttests/ThirtyDays/stdout.gr &&
+    echo "✅ looks good" ||
+    (echo "❌ failed" && exit 1)