diff --git a/config.json b/config.json
index 8c29591..5275cc3 100644
--- a/config.json
+++ b/config.json
@@ -378,6 +378,14 @@
         "prerequisites": [],
         "difficulty": 4
       },
+      {
+        "slug": "prism",
+        "name": "Prism",
+        "uuid": "a7b1dec7-9fd6-4c1b-8a55-4c3619d944d6",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "slug": "robot-simulator",
         "name": "Robot Simulator",
diff --git a/exercises/practice/prism/.busted b/exercises/practice/prism/.busted
new file mode 100644
index 0000000..86b84e7
--- /dev/null
+++ b/exercises/practice/prism/.busted
@@ -0,0 +1,5 @@
+return {
+  default = {
+    ROOT = { '.' }
+  }
+}
diff --git a/exercises/practice/prism/.docs/instructions.md b/exercises/practice/prism/.docs/instructions.md
new file mode 100644
index 0000000..a68c80d
--- /dev/null
+++ b/exercises/practice/prism/.docs/instructions.md
@@ -0,0 +1,36 @@
+# Instructions
+
+Before activating the laser array, you must predict the exact order in which crystals will be hit, identified by their sample IDs.
+
+## Example Test Case
+
+Consider this crystal array configuration:
+
+```json
+{
+  "start": { "x": 0, "y": 0, "angle": 0 },
+  "prisms": [
+    { "id": 3, "x": 30, "y": 10, "angle": 45 },
+    { "id": 1, "x": 10, "y": 10, "angle": -90 },
+    { "id": 2, "x": 10, "y": 0, "angle": 90 },
+    { "id": 4, "x": 20, "y": 0, "angle": 0 }
+  ]
+}
+```
+
+## What's Happening
+
+The laser starts at the origin `(0, 0)` and fires horizontally to the right at angle 0°.
+Here's the step-by-step beam path:
+
+**Step 1**: The beam travels along the x-axis (y = 0) and first encounters **Crystal #2** at position `(10, 0)`.
+This crystal has a refraction angle of 90°, which means it bends the beam perpendicular to its current path.
+The beam, originally traveling at 0°, is now redirected to 90° (straight up).
+
+**Step 2**: The beam now travels vertically upward from position `(10, 0)` and strikes **Crystal #1** at position `(10, 10)`.
+This crystal has a refraction angle of -90°, bending the beam by -90° relative to its current direction.
+The beam was traveling at 90°, so after refraction it's now at 0° (90° + (-90°) = 0°), traveling horizontally to the right again.
+
+**Step 3**: From position `(10, 10)`, the beam travels horizontally and encounters **Crystal #3** at position `(30, 10)`.
+This crystal refracts the beam by 45°, changing its direction to 45°.
+The beam continues into empty space beyond the array.
diff --git a/exercises/practice/prism/.docs/introduction.md b/exercises/practice/prism/.docs/introduction.md
new file mode 100644
index 0000000..bfa7ed7
--- /dev/null
+++ b/exercises/practice/prism/.docs/introduction.md
@@ -0,0 +1,5 @@
+# Introduction
+
+You're a researcher at **PRISM** (Precariously Redirected Illumination Safety Management), working with a precision laser calibration system that tests experimental crystal prisms.
+These crystals are being developed for next-generation optical computers, and each one has unique refractive properties based on its molecular structure.
+The lab's laser system can damage crystals if they receive unexpected illumination, so precise path prediction is critical.
diff --git a/exercises/practice/prism/.meta/config.json b/exercises/practice/prism/.meta/config.json
new file mode 100644
index 0000000..c4057c9
--- /dev/null
+++ b/exercises/practice/prism/.meta/config.json
@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "BNAndras"
+  ],
+  "files": {
+    "solution": [
+      "prism.moon"
+    ],
+    "test": [
+      "prism_spec.moon"
+    ],
+    "example": [
+      ".meta/example.moon"
+    ]
+  },
+  "blurb": "Calculate the path of a laser through reflective prisms.",
+  "source": "FraSanga",
+  "source_url": "https://github.com/exercism/problem-specifications/pull/2625"
+}
diff --git a/exercises/practice/prism/.meta/example.moon b/exercises/practice/prism/.meta/example.moon
new file mode 100644
index 0000000..0a4221a
--- /dev/null
+++ b/exercises/practice/prism/.meta/example.moon
@@ -0,0 +1,40 @@
+math = require "math"
+
+{
+  findSequence: (start, prisms) ->
+    { :x, :y, :angle } = start
+    sequence = {}
+
+    while true
+      rad = angle * math.pi / 180
+      dirX = math.cos rad
+      dirY = math.sin rad
+
+      nearest = nil
+      nearestDist = math.huge
+
+      for prism in *prisms
+        dx = prism.x - x
+        dy = prism.y - y
+
+        dist = dx * dirX + dy * dirY
+        -- ignore prisms behind or at the start
+        if dist > 1e-6
+          crossSq = (dx - dist * dirX) ^ 2 + (dy - dist * dirY) ^ 2
+
+          -- Bail if outside relative tolerance (more wiggle room for further prisms)
+          if crossSq < 1e-6 * math.max(1, dist * dist)
+            if dist < nearestDist
+              nearestDist = dist
+              nearest = prism
+
+      if not nearest
+        break
+
+      table.insert sequence, nearest.id
+      x = nearest.x
+      y = nearest.y
+      angle = (angle + nearest.angle) % 360
+
+    sequence
+}
diff --git a/exercises/practice/prism/.meta/spec_generator.moon b/exercises/practice/prism/.meta/spec_generator.moon
new file mode 100644
index 0000000..7da422f
--- /dev/null
+++ b/exercises/practice/prism/.meta/spec_generator.moon
@@ -0,0 +1,22 @@
+{
+  module_name: 'Prism'
+
+  generate_test: (case, level) ->
+    lines = {
+      "start = {x: #{case.input.start.x}, y: #{case.input.start.y}, angle: #{case.input.start.angle}}"
+    }
+
+    if #case.input.prisms == 0
+      table.insert lines, "prisms = {}"
+    else
+      table.insert(lines, "prisms = {")
+      for p in *case.input.prisms
+        table.insert(lines, "  {id: #{p.id}, x: #{p.x}, y: #{p.y}, angle: #{p.angle}}")
+      table.insert(lines, "}")
+
+    table.insert(lines, "expected = {#{table.concat(case.expected.sequence, ', ')}}")
+    table.insert(lines, "result = Prism.#{case.property} start, prisms")
+    table.insert(lines, "assert.are.same expected, result")
+
+    table.concat [indent line, level for line in *lines], '\n'
+}
diff --git a/exercises/practice/prism/.meta/tests.toml b/exercises/practice/prism/.meta/tests.toml
new file mode 100644
index 0000000..b002223
--- /dev/null
+++ b/exercises/practice/prism/.meta/tests.toml
@@ -0,0 +1,52 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[ec65d3b3-f7bf-4015-8156-0609c141c4c4]
+description = "zero prisms"
+
+[ec0ca17c-0c5f-44fb-89ba-b76395bdaf1c]
+description = "one prism one hit"
+
+[0db955f2-0a27-4c82-ba67-197bd6202069]
+description = "one prism zero hits"
+
+[8d92485b-ebc0-4ee9-9b88-cdddb16b52da]
+description = "going up zero hits"
+
+[78295b3c-7438-492d-8010-9c63f5c223d7]
+description = "going down zero hits"
+
+[acc723ea-597b-4a50-8d1b-b980fe867d4c]
+description = "going left zero hits"
+
+[3f19b9df-9eaa-4f18-a2db-76132f466d17]
+description = "negative angle"
+
+[96dacffb-d821-4cdf-aed8-f152ce063195]
+description = "large angle"
+
+[513a7caa-957f-4c5d-9820-076842de113c]
+description = "upward refraction two hits"
+
+[d452b7c7-9761-4ea9-81a9-2de1d73eb9ef]
+description = "downward refraction two hits"
+
+[be1a2167-bf4c-4834-acc9-e4d68e1a0203]
+description = "same prism twice"
+
+[df5a60dd-7c7d-4937-ac4f-c832dae79e2e]
+description = "simple path"
+
+[8d9a3cc8-e846-4a3b-a137-4bfc4aa70bd1]
+description = "multiple prisms floating point precision"
+
+[e077fc91-4e4a-46b3-a0f5-0ba00321da56]
+description = "complex path with multiple prisms floating point precision"
diff --git a/exercises/practice/prism/prism.moon b/exercises/practice/prism/prism.moon
new file mode 100644
index 0000000..235ff9a
--- /dev/null
+++ b/exercises/practice/prism/prism.moon
@@ -0,0 +1,4 @@
+{
+  findSequence: (start, prisms) ->
+    error 'Implement me'
+}
diff --git a/exercises/practice/prism/prism_spec.moon b/exercises/practice/prism/prism_spec.moon
new file mode 100644
index 0000000..1b5ed51
--- /dev/null
+++ b/exercises/practice/prism/prism_spec.moon
@@ -0,0 +1,252 @@
+Prism = require 'prism'
+
+describe 'prism', ->
+  it 'zero prisms', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {}
+    expected = {}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'one prism one hit', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {
+      {id: 1, x: 10, y: 0, angle: 0}
+    }
+    expected = {1}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'one prism zero hits', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {
+      {id: 1, x: -10, y: 0, angle: 0}
+    }
+    expected = {}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'going up zero hits', ->
+    start = {x: 0, y: 0, angle: 90}
+    prisms = {
+      {id: 3, x: 0, y: -10, angle: 0}
+      {id: 1, x: -10, y: 0, angle: 0}
+      {id: 2, x: 10, y: 0, angle: 0}
+    }
+    expected = {}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'going down zero hits', ->
+    start = {x: 0, y: 0, angle: -90}
+    prisms = {
+      {id: 1, x: 10, y: 0, angle: 0}
+      {id: 2, x: 0, y: 10, angle: 0}
+      {id: 3, x: -10, y: 0, angle: 0}
+    }
+    expected = {}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'going left zero hits', ->
+    start = {x: 0, y: 0, angle: 180}
+    prisms = {
+      {id: 2, x: 0, y: 10, angle: 0}
+      {id: 3, x: 10, y: 0, angle: 0}
+      {id: 1, x: 0, y: -10, angle: 0}
+    }
+    expected = {}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'negative angle', ->
+    start = {x: 0, y: 0, angle: -180}
+    prisms = {
+      {id: 1, x: 0, y: -10, angle: 0}
+      {id: 2, x: 0, y: 10, angle: 0}
+      {id: 3, x: 10, y: 0, angle: 0}
+    }
+    expected = {}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'large angle', ->
+    start = {x: 0, y: 0, angle: 2340}
+    prisms = {
+      {id: 1, x: 10, y: 0, angle: 0}
+    }
+    expected = {}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'upward refraction two hits', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {
+      {id: 1, x: 10, y: 10, angle: 0}
+      {id: 2, x: 10, y: 0, angle: 90}
+    }
+    expected = {2, 1}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'downward refraction two hits', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {
+      {id: 1, x: 10, y: 0, angle: -90}
+      {id: 2, x: 10, y: -10, angle: 0}
+    }
+    expected = {1, 2}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'same prism twice', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {
+      {id: 2, x: 10, y: 0, angle: 0}
+      {id: 1, x: 20, y: 0, angle: -180}
+    }
+    expected = {2, 1, 2}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'simple path', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {
+      {id: 3, x: 30, y: 10, angle: 45}
+      {id: 1, x: 10, y: 10, angle: -90}
+      {id: 2, x: 10, y: 0, angle: 90}
+      {id: 4, x: 20, y: 0, angle: 0}
+    }
+    expected = {2, 1, 3}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'multiple prisms floating point precision', ->
+    start = {x: 0, y: 0, angle: -6.429}
+    prisms = {
+      {id: 26, x: 5.8, y: 73.4, angle: 6.555}
+      {id: 24, x: 36.2, y: 65.2, angle: -0.304}
+      {id: 20, x: 20.4, y: 82.8, angle: 45.17}
+      {id: 31, x: -20.2, y: 48.8, angle: 30.615}
+      {id: 30, x: 24, y: 0.6, angle: 28.771}
+      {id: 29, x: 31.4, y: 79.4, angle: 61.327}
+      {id: 28, x: 36.4, y: 31.4, angle: -18.157}
+      {id: 22, x: 47, y: 57.8, angle: 54.745}
+      {id: 38, x: 36.4, y: 79.2, angle: 49.05}
+      {id: 10, x: 37.8, y: 55.2, angle: 11.978}
+      {id: 18, x: -26, y: 42.6, angle: 22.661}
+      {id: 25, x: 38.8, y: 76.2, angle: 51.958}
+      {id: 2, x: 0, y: 42.4, angle: -21.817}
+      {id: 35, x: 21.4, y: 44.8, angle: -171.579}
+      {id: 7, x: 14.2, y: -1.6, angle: 19.081}
+      {id: 33, x: 11.2, y: 44.4, angle: -165.941}
+      {id: 11, x: 15.4, y: 82.6, angle: 66.262}
+      {id: 16, x: 30.8, y: 6.6, angle: 35.852}
+      {id: 15, x: -3, y: 79.2, angle: 53.782}
+      {id: 4, x: 29, y: 75.4, angle: 17.016}
+      {id: 23, x: 41.6, y: 59.8, angle: 70.763}
+      {id: 8, x: -10, y: 15.8, angle: -9.24}
+      {id: 13, x: 48.6, y: 51.8, angle: 45.812}
+      {id: 1, x: 13.2, y: 77, angle: 17.937}
+      {id: 34, x: -8.8, y: 36.8, angle: -4.199}
+      {id: 21, x: 24.4, y: 75.8, angle: 20.783}
+      {id: 17, x: -4.4, y: 74.6, angle: 24.709}
+      {id: 9, x: 30.8, y: 41.8, angle: -165.413}
+      {id: 32, x: 4.2, y: 78.6, angle: 40.892}
+      {id: 37, x: -15.8, y: 47, angle: 33.29}
+      {id: 6, x: 1, y: 80.6, angle: 51.295}
+      {id: 36, x: -27, y: 47.8, angle: 92.52}
+      {id: 14, x: -2, y: 34.4, angle: -52.001}
+      {id: 5, x: 23.2, y: 80.2, angle: 31.866}
+      {id: 27, x: -5.6, y: 32.8, angle: -75.303}
+      {id: 12, x: -1, y: 0.2, angle: 0}
+      {id: 3, x: -6.6, y: 3.2, angle: 46.72}
+      {id: 19, x: -13.8, y: 24.2, angle: -9.205}
+    }
+    expected = {7, 30, 16, 28, 13, 22, 23, 10, 9, 24, 25, 38, 29, 4, 35, 21, 5, 20, 11, 1, 33, 26, 32, 6, 15, 17, 2, 14, 27, 34, 37, 31, 36, 18, 19, 8, 3, 12}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result
+
+  pending 'complex path with multiple prisms floating point precision', ->
+    start = {x: 0, y: 0, angle: 0}
+    prisms = {
+      {id: 46, x: 37.4, y: 20.6, angle: -88.332}
+      {id: 72, x: -24.2, y: 23.4, angle: -90.774}
+      {id: 25, x: 78.6, y: 7.8, angle: 98.562}
+      {id: 60, x: -58.8, y: 31.6, angle: 115.56}
+      {id: 22, x: 75.2, y: 28, angle: 63.515}
+      {id: 2, x: 89.8, y: 27.8, angle: 91.176}
+      {id: 23, x: 9.8, y: 30.8, angle: 30.829}
+      {id: 69, x: 22.8, y: 20.6, angle: -88.315}
+      {id: 44, x: -0.8, y: 15.6, angle: -116.565}
+      {id: 36, x: -24.2, y: 8.2, angle: -90}
+      {id: 53, x: -1.2, y: 0, angle: 0}
+      {id: 52, x: 14.2, y: 24, angle: -143.896}
+      {id: 5, x: -65.2, y: 21.6, angle: 93.128}
+      {id: 66, x: 5.4, y: 15.6, angle: 31.608}
+      {id: 51, x: -72.6, y: 21, angle: -100.976}
+      {id: 65, x: 48, y: 10.2, angle: 87.455}
+      {id: 21, x: -41.8, y: 0, angle: 68.352}
+      {id: 18, x: -46.2, y: 19.2, angle: -128.362}
+      {id: 10, x: 74.4, y: 0.4, angle: 90.939}
+      {id: 15, x: 67.6, y: 0.4, angle: 84.958}
+      {id: 35, x: 14.8, y: -0.4, angle: 89.176}
+      {id: 1, x: 83, y: 0.2, angle: 89.105}
+      {id: 68, x: 14.6, y: 28, angle: -29.867}
+      {id: 67, x: 79.8, y: 18.6, angle: -136.643}
+      {id: 38, x: 53, y: 14.6, angle: -90.848}
+      {id: 31, x: -58, y: 6.6, angle: -61.837}
+      {id: 74, x: -30.8, y: 0.4, angle: 85.966}
+      {id: 48, x: -4.6, y: 10, angle: -161.222}
+      {id: 12, x: 59, y: 5, angle: -91.164}
+      {id: 33, x: -16.4, y: 18.4, angle: 90.734}
+      {id: 4, x: 82.6, y: 27.6, angle: 71.127}
+      {id: 75, x: -10.2, y: 30.6, angle: -1.108}
+      {id: 28, x: 38, y: 0, angle: 86.863}
+      {id: 11, x: 64.4, y: -0.2, angle: 92.353}
+      {id: 9, x: -51.4, y: 31.6, angle: 67.249}
+      {id: 26, x: -39.8, y: 30.8, angle: 61.113}
+      {id: 30, x: -34.2, y: 0.6, angle: 111.33}
+      {id: 56, x: -51, y: 0.2, angle: 70.445}
+      {id: 41, x: -12, y: 0, angle: 91.219}
+      {id: 24, x: 63.8, y: 14.4, angle: 86.586}
+      {id: 70, x: -72.8, y: 13.4, angle: -87.238}
+      {id: 3, x: 22.4, y: 7, angle: -91.685}
+      {id: 13, x: 34.4, y: 7, angle: 90}
+      {id: 16, x: -47.4, y: 11.4, angle: -136.02}
+      {id: 6, x: 90, y: 0.2, angle: 90.415}
+      {id: 54, x: 44, y: 27.8, angle: 85.969}
+      {id: 32, x: -9, y: 0, angle: 91.615}
+      {id: 8, x: -31.6, y: 30.8, angle: 0.535}
+      {id: 39, x: -12, y: 8.2, angle: 90}
+      {id: 14, x: -79.6, y: 32.4, angle: 92.342}
+      {id: 42, x: 65.8, y: 20.8, angle: -85.867}
+      {id: 40, x: -65, y: 14, angle: 87.109}
+      {id: 45, x: 10.6, y: 18.8, angle: 23.697}
+      {id: 71, x: -24.2, y: 18.6, angle: -88.531}
+      {id: 7, x: -72.6, y: 6.4, angle: -89.148}
+      {id: 62, x: -32, y: 24.8, angle: -140.8}
+      {id: 49, x: 34.4, y: -0.2, angle: 89.415}
+      {id: 63, x: 74.2, y: 12.6, angle: -138.429}
+      {id: 59, x: 82.8, y: 13, angle: -140.177}
+      {id: 34, x: -9.4, y: 23.2, angle: -88.238}
+      {id: 76, x: -57.6, y: 0, angle: 1.2}
+      {id: 43, x: 7, y: 0, angle: 116.565}
+      {id: 20, x: 45.8, y: -0.2, angle: 1.469}
+      {id: 37, x: -16.6, y: 13.2, angle: 84.785}
+      {id: 58, x: -79, y: -0.2, angle: 89.481}
+      {id: 50, x: -24.2, y: 12.8, angle: -86.987}
+      {id: 64, x: 59.2, y: 10.2, angle: -92.203}
+      {id: 61, x: -72, y: 26.4, angle: -83.66}
+      {id: 47, x: 45.4, y: 5.8, angle: -82.992}
+      {id: 17, x: -52.2, y: 17.8, angle: -52.938}
+      {id: 57, x: -61.8, y: 32, angle: 84.627}
+      {id: 29, x: 47.2, y: 28.2, angle: 92.954}
+      {id: 27, x: -4.6, y: 0.2, angle: 87.397}
+      {id: 55, x: -61.4, y: 26.4, angle: 94.086}
+      {id: 73, x: -40.4, y: 13.4, angle: -62.229}
+      {id: 19, x: 53.2, y: 20.6, angle: -87.181}
+    }
+    expected = {43, 44, 66, 45, 52, 35, 49, 13, 3, 69, 46, 28, 20, 11, 24, 38, 19, 42, 15, 10, 63, 25, 59, 1, 6, 2, 4, 67, 22, 29, 65, 64, 12, 47, 54, 68, 23, 75, 8, 26, 18, 9, 60, 17, 31, 7, 70, 40, 5, 51, 61, 55, 57, 14, 58, 76, 56, 16, 21, 30, 73, 62, 74, 41, 39, 36, 50, 37, 33, 71, 72, 34, 32, 27, 48, 53}
+    result = Prism.findSequence start, prisms
+    assert.are.same expected, result