diff --git a/seed-gen/Makefile b/seed-gen/Makefile
new file mode 100644
index 00000000..6e2744c0
--- /dev/null
+++ b/seed-gen/Makefile
@@ -0,0 +1,86 @@
+SHELL := /bin/bash
+
+PY_IMPORT = seed_gen
+
+ALL_PY_SRCS := $(shell find src -name '*.py') \
+	$(shell find test -name '*.py')
+
+# Optionally overriden by the user, if they're using a virtual environment manager.
+VENV ?= env
+
+# On Windows, venv scripts/shims are under `Scripts` instead of `bin`.
+VENV_BIN := $(VENV)/bin
+ifeq ($(OS),Windows_NT)
+	VENV_BIN := $(VENV)/Scripts
+endif
+
+# Optionally overridden by the user in the `release` target.
+BUMP_ARGS :=
+
+# Optionally overridden by the user in the `test` target.
+TESTS :=
+
+# Optionally overridden by the user/CI, to limit the installation to a specific
+# subset of development dependencies.
+INSTALL_EXTRA := dev
+
+# If the user selects a specific test pattern to run, set `pytest` to fail fast
+# and only run tests that match the pattern.
+# Otherwise, run all tests and enable coverage assertions, since we expect
+# complete test coverage.
+ifneq ($(TESTS),)
+	TEST_ARGS := -x -k $(TESTS)
+	COV_ARGS :=
+else
+	TEST_ARGS :=
+	COV_ARGS := --fail-under 100
+endif
+
+.PHONY: all
+all:
+	@echo "Run my targets individually!"
+
+.PHONY: dev
+dev: $(VENV)/pyvenv.cfg
+.PHONY: run
+run: $(VENV)/pyvenv.cfg
+	# Once we can specify the default VENV name in uv, use `uv run` here
+	# https://github.com/astral-sh/uv/issues/1422
+	@. $(VENV_BIN)/activate && seed-gen $(ARGS)
+
+$(VENV)/pyvenv.cfg: pyproject.toml
+	uv venv $(VENV)
+	@. $(VENV_BIN)/activate && uv pip install -e '.[$(INSTALL_EXTRA)]'
+
+.PHONY: lint
+lint: $(VENV)/pyvenv.cfg
+	. $(VENV_BIN)/activate && \
+		ruff format --check && \
+		ruff check && \
+		mypy
+	. $(VENV_BIN)/activate && \
+		interrogate -c pyproject.toml .
+
+.PHONY: reformat
+reformat:
+	. $(VENV_BIN)/activate && \
+	    ruff format && \
+		ruff check --fix
+
+.PHONY: test tests
+test tests: $(VENV)/pyvenv.cfg
+	. $(VENV_BIN)/activate && \
+		pytest --cov=$(PY_IMPORT) $(T) $(TEST_ARGS) && \
+		python -m coverage report -m $(COV_ARGS)
+
+.PHONY: doc
+doc:
+	@echo "No documentation set up"
+
+.PHONY: package
+package: $(VENV)/pyvenv.cfg
+	uv build
+
+.PHONY: edit
+edit:
+	$(EDITOR) $(ALL_PY_SRCS)
diff --git a/seed-gen/README.md b/seed-gen/README.md
new file mode 100644
index 00000000..89d878cc
--- /dev/null
+++ b/seed-gen/README.md
@@ -0,0 +1 @@
+# seed-gen
\ No newline at end of file
diff --git a/seed-gen/pyproject.toml b/seed-gen/pyproject.toml
new file mode 100644
index 00000000..21f73383
--- /dev/null
+++ b/seed-gen/pyproject.toml
@@ -0,0 +1,80 @@
+[project]
+name = "seed-gen"
+dynamic = ["version"]
+description = "LLM seed generation and vulnerability discovery"
+readme = "README.md"
+authors = [
+    { name = "Trail of Bits", email = "opensource@trailofbits.com" },
+]
+dependencies = []
+requires-python = ">=3.9"
+
+[tool.setuptools.dynamic]
+version = { attr = "seed_gen.__version__" }
+
+[project.optional-dependencies]
+doc = []
+test = ["pytest", "pytest-cov", "pretend", "coverage[toml]"]
+lint = [
+    # NOTE: ruff is under active development, so we pin conservatively here
+    # and let Dependabot periodically perform this update.
+    "ruff ~= 0.6.2",
+    "mypy >= 1.0",
+    "types-html5lib",
+    "types-requests",
+    "types-toml",
+    "interrogate",
+]
+dev = ["seed-gen[doc,test,lint]", "twine", "build"]
+
+[project.scripts]
+"seed-gen" = "seed_gen._cli:main"
+
+[tool.coverage.run]
+# don't attempt code coverage for the CLI entrypoints
+omit = ["src/seed_gen/_cli.py"]
+
+[tool.mypy]
+mypy_path = "src"
+packages = "seed_gen"
+allow_redefinition = true
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_untyped_defs = true
+ignore_missing_imports = true
+no_implicit_optional = true
+show_error_codes = true
+sqlite_cache = true
+strict_equality = true
+warn_no_return = true
+warn_redundant_casts = true
+warn_return_any = true
+warn_unreachable = true
+warn_unused_configs = true
+warn_unused_ignores = true
+
+[tool.ruff]
+line-length = 100
+include = ["src/**/*.py", "test/**/*.py"]
+
+[tool.ruff.lint]
+select = ["ALL"]
+# D203 and D213 are incompatible with D211 and D212 respectively.
+# COM812 and ISC001 can cause conflicts when using ruff as a formatter.
+# See https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules.
+ignore = ["D203", "D213", "COM812", "ISC001"]
+
+[tool.ruff.lint.per-file-ignores]
+"src/seed_gen/_cli.py" = [
+    "T201", # allow `print` in cli module
+]
+"test/**/*.py" = [
+    "D",    # no docstrings in tests
+    "S101", # asserts are expected in tests
+]
+[tool.interrogate]
+# don't enforce documentation coverage for packaging, testing, the virtual
+# environment, or the CLI (which is documented separately).
+exclude = ["env", "test", "src/seed_gen/_cli.py"]
+ignore-semiprivate = true
+fail-under = 100
diff --git a/seed-gen/src/seed_gen/__init__.py b/seed-gen/src/seed_gen/__init__.py
new file mode 100644
index 00000000..aac338b0
--- /dev/null
+++ b/seed-gen/src/seed_gen/__init__.py
@@ -0,0 +1,3 @@
+"""The `seed-gen` APIs."""
+
+__version__ = "0.0.1"
diff --git a/seed-gen/src/seed_gen/__main__.py b/seed-gen/src/seed_gen/__main__.py
new file mode 100644
index 00000000..1677871b
--- /dev/null
+++ b/seed-gen/src/seed_gen/__main__.py
@@ -0,0 +1,6 @@
+"""The `python -m seed-gen` entrypoint."""
+
+if __name__ == "__main__":  # pragma: no cover
+    from seed_gen._cli import main
+
+    main()
diff --git a/seed-gen/src/seed_gen/_cli.py b/seed-gen/src/seed_gen/_cli.py
new file mode 100644
index 00000000..8e0f81d6
--- /dev/null
+++ b/seed-gen/src/seed_gen/_cli.py
@@ -0,0 +1,5 @@
+"""The `seed-gen` entrypoint."""
+
+
+def main() -> None:
+    print("Hello, world!")
diff --git a/seed-gen/src/seed_gen/py.typed b/seed-gen/src/seed_gen/py.typed
new file mode 100644
index 00000000..e69de29b
diff --git a/seed-gen/test/__init__.py b/seed-gen/test/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/seed-gen/test/test_init.py b/seed-gen/test/test_init.py
new file mode 100644
index 00000000..3c5a8ddc
--- /dev/null
+++ b/seed-gen/test/test_init.py
@@ -0,0 +1,9 @@
+"""Initial testing module."""
+
+import seed_gen
+
+
+def test_version() -> None:
+    version = getattr(seed_gen, "__version__", None)
+    assert version is not None
+    assert isinstance(version, str)