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..7018f127
--- /dev/null
+++ b/bash/texttest_fixture.sh
@@ -0,0 +1,37 @@
+#!/bin/bash
+
+GILDED_ROSE_SCRIPT="./gilded_rose.sh"
+
+# Define initial items as a multi-line string
+initial_items="+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"
+
+simulate_days() {
+    local days=$1
+    local items="$2"
+
+    for ((day = 0; day <= days; day++)); do
+        echo "-------- day $day --------"
+        echo "name, sellIn, quality"
+
+        echo "$items" | sed 's/|/, /g'
+
+        # Update the items for the next day
+        items=$(echo "$items" | bash "$GILDED_ROSE_SCRIPT")
+
+        echo ""
+    done
+}
+
+echo OMGHAI!
+
+DAYS_TO_SIMULATE=${1:-2}
+
+simulate_days $DAYS_TO_SIMULATE "$initial_items"
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)
diff --git a/jq/README.md b/jq/README.md
index a4dd4d82..1e823968 100644
--- a/jq/README.md
+++ b/jq/README.md
@@ -1,6 +1,6 @@
-# Installs
+# Requirements
 
-[install jaq](https://github.com/01mf02/jaq#installation) (latest development version)
+jq
 
 # Failing Unit Test
 
@@ -11,11 +11,11 @@
 # TextTest Fixture
 
 ```shell
-jaq -nr "$(cat gilded-rose.jq) $(cat texttest_fixture.jq)"
+jq -nr "$(cat gilded-rose.jq) $(cat texttest_fixture.jq)"
 ```
 
 Specify days (e.g. 10 days):
 
 ```shell
-jaq --arg days 10 -nr "$(cat gilded-rose.jq) $(cat texttest_fixture.jq)"
+jq --arg days 10 -nr "$(cat gilded-rose.jq) $(cat texttest_fixture.jq)"
 ```
diff --git a/jq/gilded-rose.jq b/jq/gilded-rose.jq
index e4096d57..e9c7d941 100644
--- a/jq/gilded-rose.jq
+++ b/jq/gilded-rose.jq
@@ -1,54 +1,52 @@
 def update_quality:
     [
-        foreach .[] as $item (
-            null;
-            $item |
-            if .name != "Aged Brie" and .name != "Backstage passes to a TAFKAL80ETC concert" then
-                if .quality > 0 then
-                    if .name != "Sulfuras, Hand of Ragnaros" then
-                        .quality = .quality - 1
-                    else . end
-                else . end
+        .[]
+        |
+        if .name != "Aged Brie" and .name != "Backstage passes to a TAFKAL80ETC concert" then
+            if .quality > 0 then
+                if .name != "Sulfuras, Hand of Ragnaros" then
+                    .quality = .quality - 1
+                end
+            end
+        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
+                        end
+                    end
+                    |
+                    if .sell_in < 6 then
+                        if .quality < 50 then
+                            .quality = .quality + 1
+                        end
+                    end
+                end
+            end
+        end
+        |
+        if .name != "Sulfuras, Hand of Ragnaros" then
+            .sell_in = .sell_in - 1
+        end
+        |
+        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
+                        end
+                    end
+                else
+                    .quality = .quality - .quality
+                end
             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
-                            else . end
-                        else . end
-                        |
-                        if .sell_in < 6 then
-                            if .quality < 50 then
-                                .quality = .quality + 1
-                            else . end
-                        else . end
-                    else . end
-                else . end
-            end
-            |
-            if .name != "Sulfuras, Hand of Ragnaros" then
-                .sell_in = .sell_in - 1
-            else . end
-            |
-            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
-                            else . end
-                        else . end
-                    else
-                        .quality = .quality - .quality
-                    end
-                else
-                    if .quality < 50 then
-                        .quality = .quality + 1
-                    else . end
                 end
-            else . end
-        )
+            end
+        end
     ];
diff --git a/jq/test-gilded-rose.sh b/jq/test-gilded-rose.sh
index 62d91240..b667d26f 100755
--- a/jq/test-gilded-rose.sh
+++ b/jq/test-gilded-rose.sh
@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
 
-jaq -en "$(cat gilded-rose.jq)"'[{name:"foo",sell_in:0,quality:0}] | update_quality | .[].name == "fixme"'
+jq -en "$(cat gilded-rose.jq)"'[{name:"foo",sell_in:0,quality:0}] | update_quality | .[].name == "fixme"'
diff --git a/jq/texttest_fixture.jq b/jq/texttest_fixture.jq
index 12c08dc3..9f153790 100644
--- a/jq/texttest_fixture.jq
+++ b/jq/texttest_fixture.jq
@@ -12,7 +12,7 @@
         { name: "Conjured Mana Cake", sell_in: 3, quality: 6}  # <-- :O
     ] |
     { items: ., day: 0 } |
-    recurse(.day += 1 | .items = (.items | update_quality); .day < ($ARGS.named.days // 2 | tonumber)) |
+    recurse(.day += 1 | .items = (.items | update_quality); .day <= ($ARGS.named.days // 2 | tonumber)) |
     (
         (["-------- day ", (.day | tostring), " --------"] | add),
         ("name, sellIn, quality"),
diff --git a/ruby/gilded_rose_spec.rb b/ruby/gilded_rose_spec.rb
index 1ad468f8..015a759f 100644
--- a/ruby/gilded_rose_spec.rb
+++ b/ruby/gilded_rose_spec.rb
@@ -3,77 +3,9 @@ require 'rspec'
 require File.join(File.dirname(__FILE__), 'gilded_rose')
 
 describe GildedRose do
-
-  describe "#update_quality" do
-    it "does not change the name" do
-      items = [Item.new("foo", 0, 0)]
-      GildedRose.new(items).update_quality()
-      expect(items[0].name).to eq "foo"
-    end
-
-    it 'decreases the sell_in and quality for regular items' do
-      item = Item.new('Regular Item', 5, 10)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(9)
-      expect(item.sell_in).to eq(4)
-    end
-
-    it 'decreases quality twice as fast when sell_in is negative for regular items' do
-      item = Item.new('Regular Item', 0, 10)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(8)
-    end
-
-    it 'increases the quality of Aged Brie' do
-      item = Item.new('Aged Brie', 5, 10)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(11)
-    end
-
-    it 'does not increase the quality of Aged Brie beyond 50' do
-      item = Item.new('Aged Brie', 5, 50)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(50)
-    end
-
-    it 'increases the quality of Backstage passes as sell_in approaches' do
-      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 11, 20)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(21)
-    end
-
-    it 'increases the quality of Backstage passes by 2 when sell_in is 10 or less' do
-      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 10, 20)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(22)
-    end
-
-    it 'increases the quality of Backstage passes by 3 when sell_in is 5 or less' do
-      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 5, 20)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(23)
-    end
-
-    it 'sets the quality of Backstage passes to 0 after the concert' do
-      item = Item.new('Backstage passes to a TAFKAL80ETC concert', 0, 20)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(0)
-    end
-
-    it 'does not decrease the quality of Sulfuras' do
-      item = Item.new('Sulfuras, Hand of Ragnaros', 5, 80)
-      gilded_rose = GildedRose.new([item])
-      gilded_rose.update_quality
-      expect(item.quality).to eq(80)
-    end
+  it "does not change the name" do
+    items = [Item.new("foo", 0, 0)]
+    GildedRose.new(items).update_quality()
+    expect(items[0].name).to eq "fixme"
   end
-
 end
diff --git a/ruby/gilded_rose_tests.rb b/ruby/gilded_rose_tests.rb
index b7643d3e..4e2ec30d 100644
--- a/ruby/gilded_rose_tests.rb
+++ b/ruby/gilded_rose_tests.rb
@@ -2,67 +2,9 @@ require 'minitest/autorun'
 require_relative 'gilded_rose'
 
 class TestGildedRose < Minitest::Test
-  def test_update_quality_regular_item
-    item = Item.new('Regular Item', 5, 10)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 9, item.quality
-    assert_equal 4, item.sell_in
-  end
-
-  def test_update_quality_negative_sell_in_regular_item
-    item = Item.new('Regular Item', 0, 10)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 8, item.quality
-  end
-
-  def test_update_quality_aged_brie
-    item = Item.new('Aged Brie', 5, 10)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 11, item.quality
-  end
-
-  def test_update_quality_max_quality_aged_brie
-    item = Item.new('Aged Brie', 5, 50)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 50, item.quality
-  end
-
-  def test_update_quality_backstage_passes_approaching
-    item = Item.new('Backstage passes to a TAFKAL80ETC concert', 11, 20)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 21, item.quality
-  end
-
-  def test_update_quality_backstage_passes_sell_in_10_or_less
-    item = Item.new('Backstage passes to a TAFKAL80ETC concert', 10, 20)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 22, item.quality
-  end
-
-  def test_update_quality_backstage_passes_sell_in_5_or_less
-    item = Item.new('Backstage passes to a TAFKAL80ETC concert', 5, 20)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 23, item.quality
-  end
-
-  def test_update_quality_backstage_passes_after_concert
-    item = Item.new('Backstage passes to a TAFKAL80ETC concert', 0, 20)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 0, item.quality
-  end
-
-  def test_update_quality_sulfuras
-    item = Item.new('Sulfuras, Hand of Ragnaros', 5, 80)
-    gilded_rose = GildedRose.new([item])
-    gilded_rose.update_quality
-    assert_equal 80, item.quality
+  def test_foo
+    items = [Item.new("foo", 0, 0)]
+    GildedRose.new(items).update_quality()
+    assert_equal "fixme", items[0].name
   end
 end