spec: add maze-printable specification (#3236)

## New Specification: `maze-printable`

Related to #3232

---

### specification.md

# maze-printable: Printable Maze Puzzle

## Description

A rectangular maze puzzle visualization with clearly marked start and
goal positions. The maze is algorithmically generated to guarantee
exactly one solution path from start to finish. The clean
black-and-white design is optimized for printing, allowing users to
solve the puzzle with a pen or pencil.

## Applications

- Printable activity sheets for children's entertainment and education
- Puzzle books and newspapers requiring programmatically generated mazes
- Educational materials teaching algorithmic thinking and
problem-solving
- Restaurant placemats and waiting room entertainment

## Data

- `width` (int) - Number of cells horizontally (recommended: 15-40)
- `height` (int) - Number of cells vertically (recommended: 15-40)
- `seed` (int, optional) - Random seed for reproducible maze generation
- Size: Grid dimensions determine complexity (larger = harder)
- Example: 25x25 grid with start at top-left, goal at bottom-right

## Notes

- Use maze generation algorithms (DFS, Prim's, Kruskal's) that guarantee
a single solution
- Start position typically marked with "S" or arrow, goal with "G" or
star
- Wall thickness should be consistent and print-friendly (not too thin)
- Include adequate margins for printing
- Black walls on white background for maximum contrast and ink
efficiency
- Passage width should accommodate pen/pencil marking

---

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---
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plots/maze-printable/specification.md

@@ -0,0 +1,29 @@
+# maze-printable: Printable Maze Puzzle
+
+## Description
+
+A rectangular maze puzzle visualization with clearly marked start and goal positions. The maze is algorithmically generated to guarantee exactly one solution path from start to finish. The clean black-and-white design is optimized for printing, allowing users to solve the puzzle with a pen or pencil.
+
+## Applications
+
+- Printable activity sheets for children's entertainment and education
+- Puzzle books and newspapers requiring programmatically generated mazes
+- Educational materials teaching algorithmic thinking and problem-solving
+- Restaurant placemats and waiting room entertainment
+
+## Data
+
+- `width` (int) - Number of cells horizontally (recommended: 15-40)
+- `height` (int) - Number of cells vertically (recommended: 15-40)
+- `seed` (int, optional) - Random seed for reproducible maze generation
+- Size: Grid dimensions determine complexity (larger = harder)
+- Example: 25x25 grid with start at top-left, goal at bottom-right
+
+## Notes
+
+- Use maze generation algorithms (DFS, Prim's, Kruskal's) that guarantee a single solution
+- Start position typically marked with "S" or arrow, goal with "G" or star
+- Wall thickness should be consistent and print-friendly (not too thin)
+- Include adequate margins for printing
+- Black walls on white background for maximum contrast and ink efficiency
+- Passage width should accommodate pen/pencil marking

plots/maze-printable/specification.yaml

@@ -0,0 +1,28 @@
+# Specification-level metadata for maze-printable
+# Auto-synced to PostgreSQL on push to main
+
+spec_id: maze-printable
+title: Printable Maze Puzzle
+
+# Specification tracking
+created: 2026-01-07T20:05:58Z
+updated: null
+issue: 3232
+suggested: MarkusNeusinger
+
+# Classification tags (applies to all library implementations)
+# See docs/reference/tagging-system.md for detailed guidelines
+tags:
+  plot_type:
+    - maze
+    - grid
+  data_type:
+    - discrete
+    - matrix
+  domain:
+    - general
+    - education
+  features:
+    - basic
+    - algorithmic
+    - printable