diff --git a/.gitignore b/.gitignore
index 5ceb386..7f93ebf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 venv
+__pycache__
diff --git a/README.md b/README.md
index 9f7469c..30f766a 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,36 @@
-# Advent Of Code
+# Holt59 - Advent Of Code
 
-To run any script, you need to pipe the input:
+Installation (with [`poetry`](https://python-poetry.org/)):
 
 ```bash
-cat 2022/inputs/day2.txt | python 2022/day2.py
+poetry install
+```
+
+To run any day:
+
+```bash
+holt59-aoc $day
+```
+
+You can use `-v` / `--verbose` for extra outputs in some case, `-t` / `--test` to run
+the code on the test data (one of the test data if multiple are present) or even
+`-u XXX` / `--user XXX` to run the code on a specific input after putting the input
+file under `src/holt59/aoc/inputs/XXX/$year/$day`.
+
+Full usage:
+
+```bash
+usage: Holt59 Advent-Of-Code Runner [-h] [-v] [-t] [-u USER] [-i INPUT] [-y YEAR] day
+
+positional arguments:
+  day                   day to run
+
+options:
+  -h, --help            show this help message and exit
+  -v, --verbose         verbose mode
+  -t, --test            test mode
+  -u USER, --user USER  user input to use
+  -i INPUT, --input INPUT
+                        input to use (override user and test)
+  -y YEAR, --year YEAR  year to run
 ```
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..329384e
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,444 @@
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diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..98fc71e
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,45 @@
+[tool.poetry]
+name = "holt59-advent-of-code"
+version = "0.1.0"
+description = ""
+authors = ["Mikael CAPELLE <capelle.mikael@gmail.com>"]
+license = "MIT"
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+packages = [{ include = "holt59", from = "src" }]
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+lint-isort = "isort -c src tests typings"
+lint-ruff = "ruff src tests typings"
+lint-flake8 = "flake8 src tests typings"
+lint-pyright = "pyright src tests"
+lint-all.sequence = [
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+    "lint-isort",
+    "lint-flake8",
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+ruff = "^0.1.8"
+poethepoet = "^0.24.4"
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+build-backend = "poetry.core.masonry.api"
diff --git a/2021/inputs/day10.txt b/src/holt59/aoc/2021/__init__.py
similarity index 100%
rename from 2021/inputs/day10.txt
rename to src/holt59/aoc/2021/__init__.py
diff --git a/2021/day1.py b/src/holt59/aoc/2021/day1.py
similarity index 100%
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diff --git a/2021/day10.py b/src/holt59/aoc/2021/day10.py
similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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diff --git a/2021/inputs/day12.txt b/src/holt59/aoc/2023/__init__.py
similarity index 100%
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diff --git a/2023/day1.py b/src/holt59/aoc/2023/day1.py
similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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similarity index 100%
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diff --git a/2023/day6.py b/src/holt59/aoc/2023/day6.py
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diff --git a/2023/day7.py b/src/holt59/aoc/2023/day7.py
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diff --git a/2023/day8.py b/src/holt59/aoc/2023/day8.py
similarity index 100%
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diff --git a/2023/day9.py b/src/holt59/aoc/2023/day9.py
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rename to src/holt59/aoc/2023/day9.py
diff --git a/src/holt59/aoc/__main__.py b/src/holt59/aoc/__main__.py
new file mode 100644
index 0000000..ba8da17
--- /dev/null
+++ b/src/holt59/aoc/__main__.py
@@ -0,0 +1,49 @@
+import argparse
+import importlib
+import os
+import sys
+from pathlib import Path
+
+
+def main():
+    parser = argparse.ArgumentParser("Holt59 Advent-Of-Code Runner")
+    parser.add_argument("-v", "--verbose", action="store_true", help="verbose mode")
+    parser.add_argument("-t", "--test", action="store_true", help="test mode")
+    parser.add_argument(
+        "-u", "--user", type=str, default="holt59", help="user input to use"
+    )
+    parser.add_argument(
+        "-i",
+        "--input",
+        type=Path,
+        default=None,
+        help="input to use (override user and test)",
+    )
+    parser.add_argument("-y", "--year", type=int, help="year to run", default=2023)
+    parser.add_argument("day", type=int, help="day to run")
+
+    args = parser.parse_args()
+
+    verbose: bool = args.verbose
+    test: bool = args.test
+    user: str = args.user
+    input_path: Path | None = args.input
+
+    year: int = args.year
+    day: int = args.day
+
+    # TODO: change this
+    if verbose:
+        os.environ["AOC_VERBOSE"] = "True"
+
+    if input_path is None:
+        input_path = Path(__file__).parent.joinpath(
+            "inputs", "tests" if test else user, str(year), f"day{day}.txt"
+        )
+    assert input_path.exists(), f"{input_path} missing"
+
+    with open(input_path) as fp:
+        sys.stdin = fp
+        importlib.import_module(f".{year}.day{day}", __package__)
+
+    sys.stdin = sys.__stdin__
diff --git a/2021/inputs/day1.txt b/src/holt59/aoc/inputs/holt59/2021/day1.txt
similarity index 100%
rename from 2021/inputs/day1.txt
rename to src/holt59/aoc/inputs/holt59/2021/day1.txt
diff --git a/2021/tests/day10.txt b/src/holt59/aoc/inputs/holt59/2021/day10.txt
similarity index 100%
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diff --git a/2021/tests/day12.txt b/src/holt59/aoc/inputs/holt59/2021/day12.txt
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similarity index 100%
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diff --git a/2021/inputs/day18.txt b/src/holt59/aoc/inputs/holt59/2021/day18.txt
similarity index 100%
rename from 2021/inputs/day18.txt
rename to src/holt59/aoc/inputs/holt59/2021/day18.txt
diff --git a/2021/inputs/day19.txt b/src/holt59/aoc/inputs/holt59/2021/day19.txt
similarity index 100%
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rename to src/holt59/aoc/inputs/holt59/2021/day19.txt
diff --git a/2021/inputs/day2.txt b/src/holt59/aoc/inputs/holt59/2021/day2.txt
similarity index 100%
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rename to src/holt59/aoc/inputs/holt59/2021/day2.txt
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similarity index 100%
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diff --git a/2021/inputs/day21.txt b/src/holt59/aoc/inputs/holt59/2021/day21.txt
similarity index 100%
rename from 2021/inputs/day21.txt
rename to src/holt59/aoc/inputs/holt59/2021/day21.txt
diff --git a/2021/inputs/day22.txt b/src/holt59/aoc/inputs/holt59/2021/day22.txt
similarity index 100%
rename from 2021/inputs/day22.txt
rename to src/holt59/aoc/inputs/holt59/2021/day22.txt
diff --git a/2021/inputs/day23.txt b/src/holt59/aoc/inputs/holt59/2021/day23.txt
similarity index 100%
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rename to src/holt59/aoc/inputs/holt59/2021/day23.txt
diff --git a/2021/inputs/day24.txt b/src/holt59/aoc/inputs/holt59/2021/day24.txt
similarity index 100%
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similarity index 100%
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