diff --git a/changes/1674.feature.rst b/changes/1674.feature.rst
new file mode 100644
index 00000000..e03ab6cb
--- /dev/null
+++ b/changes/1674.feature.rst
@@ -0,0 +1,1 @@
+The contents of ``pyproject.toml`` is now included in the log file.
diff --git a/changes/1708.feature.rst b/changes/1708.feature.rst
new file mode 100644
index 00000000..f77632c6
--- /dev/null
+++ b/changes/1708.feature.rst
@@ -0,0 +1,1 @@
+When deep debug is activated via ``-vv``, ``pip`` now installs requirements for the app with verbose logging.
diff --git a/src/briefcase/commands/create.py b/src/briefcase/commands/create.py
index 81e98697..da05e986 100644
--- a/src/briefcase/commands/create.py
+++ b/src/briefcase/commands/create.py
@@ -524,6 +524,7 @@ class CreateCommand(BaseCommand):
                     "--no-user",
                     f"--target={app_packages_path}",
                 ]
+                + (["-vv"] if self.logger.is_deep_debug else [])
                 + self._extra_pip_args(app)
                 + pip_args,
                 check=True,
diff --git a/src/briefcase/commands/dev.py b/src/briefcase/commands/dev.py
index f4d78b13..f37e36ec 100644
--- a/src/briefcase/commands/dev.py
+++ b/src/briefcase/commands/dev.py
@@ -99,6 +99,7 @@ class DevCommand(RunAppMixin, BaseCommand):
                             "install",
                             "--upgrade",
                         ]
+                        + (["-vv"] if self.logger.is_deep_debug else [])
                         + requires,
                         check=True,
                         encoding="UTF-8",
diff --git a/src/briefcase/console.py b/src/briefcase/console.py
index c05c3a0c..b2c48905 100644
--- a/src/briefcase/console.py
+++ b/src/briefcase/console.py
@@ -398,9 +398,9 @@ class Log:
                 self.warning(f"Log saved to {log_filepath}")
             self.print.to_console()
 
-    def _build_log(self, command):
+    def _build_log(self, command) -> str:
         """Accumulate all information to include in the log file."""
-        # add the exception stacktrace to end of log if one was captured
+        # Add the exception stacktraces to end of log if any were captured
         if self.stacktraces:
             # using print.log.print() instead of print.to_log() to avoid
             # timestamp and code location inclusion for the stacktrace box.
@@ -415,6 +415,7 @@ class Log:
                     new_line_start=True,
                 )
 
+        # Retrieve additional logging added by the Command
         if self.log_file_extras:
             with command.input.wait_bar(
                 "Collecting extra information for log...",
@@ -428,21 +429,30 @@ class Log:
                     except Exception:
                         self.error(traceback.format_exc())
 
-        # build log header and export buffered log from Rich
-        uname = platform.uname()
+        # Capture env vars removing any potentially sensitive information
         sanitized_env_vars = "\n".join(
             f"\t{env_var}={value if not SENSITIVE_SETTING_RE.search(env_var) else '********************'}"
             for env_var, value in sorted(command.tools.os.environ.items())
         )
+
+        # Capture pyproject.toml if one exists in the current directory
+        try:
+            with open(Path.cwd() / "pyproject.toml", encoding="utf-8") as f:
+                pyproject_toml = f.read().strip()
+        except OSError as e:
+            pyproject_toml = str(e)
+
+        # Build log with buffered log from Rich
+        uname = platform.uname()
         return (
             f"Date/Time:       {datetime.now().strftime('%Y-%m-%d %H:%M:%S %Z')}\n"
             f"Command line:    {' '.join(sys.argv)}\n"
-            f"\n"
+            "\n"
             f"OS Release:      {uname.system} {uname.release}\n"
             f"OS Version:      {uname.version}\n"
             f"Architecture:    {uname.machine}\n"
             f"Platform:        {platform.platform(aliased=True)}\n"
-            f"\n"
+            "\n"
             f"Python exe:      {sys.executable}\n"
             # replace line breaks with spaces (use chr(10) since '\n' isn't allowed in f-strings...)
             f"Python version:  {sys.version.replace(chr(10), ' ')}\n"
@@ -452,15 +462,18 @@ class Log:
             f"Virtual env:     {hasattr(sys, 'real_prefix') or sys.base_prefix != sys.prefix}\n"
             # for conda, prefix and base_prefix are likely the same but contain a conda-meta dir.
             f"Conda env:       {(Path(sys.prefix) / 'conda-meta').exists()}\n"
-            f"\n"
+            "\n"
             f"Briefcase:       {__version__}\n"
             f"Target platform: {command.platform}\n"
             f"Target format:   {command.output_format}\n"
-            f"\n"
-            f"Environment Variables:\n"
+            "\n"
+            "Environment Variables:\n"
             f"{sanitized_env_vars}\n"
-            f"\n"
-            f"Briefcase Log:\n"
+            "\n"
+            "pyproject.toml:\n"
+            f"{pyproject_toml}\n"
+            "\n"
+            "Briefcase Log:\n"
             f"{self.print.export_log()}"
         )
 
diff --git a/src/briefcase/platforms/web/static.py b/src/briefcase/platforms/web/static.py
index bd10c383..a80aa39f 100644
--- a/src/briefcase/platforms/web/static.py
+++ b/src/briefcase/platforms/web/static.py
@@ -169,7 +169,8 @@ class StaticWebBuildCommand(StaticWebMixin, BuildCommand):
                         self.wheel_path(app),
                         "-r",
                         self.bundle_path(app) / "requirements.txt",
-                    ],
+                    ]
+                    + (["-vv"] if self.logger.is_deep_debug else []),
                     check=True,
                     encoding="UTF-8",
                 )

diff --git a/tests/commands/create/test_install_app_requirements.py b/tests/commands/create/test_install_app_requirements.py
index 2a357c32..59dda9dc 100644
--- a/tests/commands/create/test_install_app_requirements.py
+++ b/tests/commands/create/test_install_app_requirements.py
@@ -7,6 +7,7 @@ import pytest
 import tomli_w
 
 from briefcase.commands.create import _is_local_requirement
+from briefcase.console import LogLevel
 from briefcase.exceptions import BriefcaseCommandError, RequirementsInstallError
 from briefcase.integrations.subprocess import Subprocess
 
@@ -285,13 +286,17 @@ def test_app_packages_offline(
     assert myapp.test_requires is None
 
 
+@pytest.mark.parametrize("logging_level", [LogLevel.INFO, LogLevel.DEEP_DEBUG])
 def test_app_packages_install_requirements(
     create_command,
     myapp,
     app_packages_path,
     app_packages_path_index,
+    logging_level,
 ):
     """Requirements can be installed."""
+    # Configure logging level
+    create_command.logger.verbosity = logging_level
 
     # Set up the app requirements
     myapp.requires = ["first", "second", "third"]
@@ -319,10 +324,9 @@ def test_app_packages_install_requirements(
             "--upgrade",
             "--no-user",
             f"--target={app_packages_path}",
-            "first",
-            "second",
-            "third",
-        ],
+        ]
+        + (["-vv"] if logging_level == LogLevel.DEEP_DEBUG else [])
+        + ["first", "second", "third"],
         check=True,
         encoding="UTF-8",
     )
diff --git a/tests/commands/dev/test_install_dev_requirements.py b/tests/commands/dev/test_install_dev_requirements.py
index b8a02705..a813a4cd 100644
--- a/tests/commands/dev/test_install_dev_requirements.py
+++ b/tests/commands/dev/test_install_dev_requirements.py
@@ -3,11 +3,16 @@ from subprocess import CalledProcessError
 
 import pytest
 
+from briefcase.console import LogLevel
 from briefcase.exceptions import RequirementsInstallError
 
 
-def test_install_requirements_no_error(dev_command, first_app):
+@pytest.mark.parametrize("logging_level", [LogLevel.INFO, LogLevel.DEEP_DEBUG])
+def test_install_requirements_no_error(dev_command, first_app, logging_level):
     """Ensure run is executed properly to install requirements."""
+    # Configure logging level
+    dev_command.logger.verbosity = logging_level
+
     first_app.requires = ["package-one", "package_two", "packagethree"]
 
     dev_command.install_dev_requirements(app=first_app)
@@ -22,10 +27,9 @@ def test_install_requirements_no_error(dev_command, first_app):
             "pip",
             "install",
             "--upgrade",
-            "package-one",
-            "package_two",
-            "packagethree",
-        ],
+        ]
+        + (["-vv"] if logging_level == LogLevel.DEEP_DEBUG else [])
+        + ["package-one", "package_two", "packagethree"],
         check=True,
         encoding="UTF-8",
     )
diff --git a/tests/console/test_Log.py b/tests/console/test_Log.py
index 3515c137..e17f00fe 100644
--- a/tests/console/test_Log.py
+++ b/tests/console/test_Log.py
@@ -2,6 +2,7 @@ import contextlib
 import datetime
 import logging
 from io import TextIOBase
+from pathlib import Path
 from unittest.mock import MagicMock, PropertyMock, call
 
 import pytest
@@ -162,7 +163,7 @@ def test_save_log_to_file_do_not_log(command):
     assert len(logger.stacktraces) == 0
 
 
-def test_save_log_to_file_no_exception(mock_now, command, tmp_path):
+def test_save_log_to_file_no_exception(mock_now, command, tmp_path, monkeypatch):
     """Log file contains everything printed to log; env vars are sanitized; no
     stacktrace if one is not captured."""
     command.tools.os.environ = {
@@ -203,13 +204,18 @@ def test_save_log_to_file_no_exception(mock_now, command, tmp_path):
         with command.tools.input.wait_bar("abort message..."):
             raise KeyboardInterrupt
 
+    project_root = tmp_path / "project_root"
+    project_root.mkdir(exist_ok=True)
+    monkeypatch.chdir(project_root)
+    with open("pyproject.toml", "w", encoding="utf-8") as f:
+        f.writelines(["[section]\n", "name = 'project'\n\n\n\n\n"])
+
     logger.save_log_to_file(command=command)
 
     log_filepath = tmp_path / "logs/briefcase.2022_06_25-16_12_29.dev.log"
 
     assert log_filepath.exists()
-    with open(log_filepath, encoding="utf-8") as log:
-        log_contents = log.read()
+    log_contents = log_filepath.read_text(encoding="utf-8")
 
     assert log_contents.startswith("Date/Time:       2022-06-25 16:12:29")
     assert "this is debug output" in log_contents
@@ -235,6 +241,7 @@ def test_save_log_to_file_no_exception(mock_now, command, tmp_path):
     assert "wait message... done" in log_contents
     assert "abort message... started" in log_contents
     assert "abort message... aborted" in log_contents
+    assert "pyproject.toml:\n[section]\nname = 'project'\n\nBriefcase" in log_contents
 
     assert TRACEBACK_HEADER not in log_contents
     assert EXTRA_HEADER not in log_contents
@@ -253,8 +260,7 @@ def test_save_log_to_file_with_exception(mock_now, command, tmp_path):
     log_filepath = tmp_path / "logs/briefcase.2022_06_25-16_12_29.dev.log"
 
     assert log_filepath.exists()
-    with open(log_filepath, encoding="utf-8") as log:
-        log_contents = log.read()
+    log_contents = log_filepath.read_text(encoding="utf-8")
 
     assert len(logger.stacktraces) == 1
     assert log_contents.startswith("Date/Time:       2022-06-25 16:12:29")
@@ -277,8 +283,7 @@ def test_save_log_to_file_with_multiple_exceptions(mock_now, command, tmp_path):
     log_filepath = tmp_path / "logs/briefcase.2022_06_25-16_12_29.dev.log"
 
     assert log_filepath.exists()
-    with open(log_filepath, encoding="utf-8") as log:
-        log_contents = log.read()
+    log_contents = log_filepath.read_text(encoding="utf-8")
 
     assert len(logger.stacktraces) == 4
     assert log_contents.startswith("Date/Time:       2022-06-25 16:12:29")
@@ -306,8 +311,7 @@ def test_save_log_to_file_extra(mock_now, command, tmp_path):
         logger.add_log_file_extra(extra)
     logger.save_log_to_file(command=command)
     log_filepath = tmp_path / "logs/briefcase.2022_06_25-16_12_29.dev.log"
-    with open(log_filepath, encoding="utf-8") as log:
-        log_contents = log.read()
+    log_contents = log_filepath.read_text(encoding="utf-8")
 
     assert EXTRA_HEADER in log_contents
     assert "Log extra 1" in log_contents
@@ -334,6 +338,25 @@ def test_save_log_to_file_extra_interrupted(mock_now, command, tmp_path):
     assert log_filepath.stat().st_size == 0
 
 
+def test_save_log_to_file_missing_pyproject(mock_now, command, tmp_path, monkeypatch):
+    """Log file contains pyproject read exception if it's missing."""
+    logger = Log()
+    logger.save_log = True
+
+    # ensure in a directory without a pyproject.toml
+    monkeypatch.chdir(tmp_path)
+    Path(tmp_path / "pyproject.toml").unlink(missing_ok=True)
+
+    logger.save_log_to_file(command=command)
+
+    log_filepath = tmp_path / "logs/briefcase.2022_06_25-16_12_29.dev.log"
+
+    assert log_filepath.exists()
+    log_contents = log_filepath.read_text(encoding="utf-8")
+
+    assert "pyproject.toml:\n[Errno 2] No such file or directory" in log_contents
+
+
 def test_save_log_to_file_fail_to_make_logs_dir(
     mock_now,
     command,
diff --git a/tests/platforms/web/static/test_build.py b/tests/platforms/web/static/test_build.py
index 72f3f5c7..b4927ecc 100644
--- a/tests/platforms/web/static/test_build.py
+++ b/tests/platforms/web/static/test_build.py
@@ -10,7 +10,7 @@ else:  # pragma: no-cover-if-gte-py311
 
 import pytest
 
-from briefcase.console import Console, Log
+from briefcase.console import Console, Log, LogLevel
 from briefcase.exceptions import BriefcaseCommandError, BriefcaseConfigError
 from briefcase.integrations.subprocess import Subprocess
 from briefcase.platforms.web.static import StaticWebBuildCommand
@@ -32,8 +32,12 @@ def build_command(tmp_path):
     return command
 
 
-def test_build_app(build_command, first_app_generated, tmp_path):
+@pytest.mark.parametrize("logging_level", [LogLevel.INFO, LogLevel.DEEP_DEBUG])
+def test_build_app(build_command, first_app_generated, logging_level, tmp_path):
     """An app can be built."""
+    # Configure logging level
+    build_command.logger.verbosity = logging_level
+
     bundle_path = tmp_path / "base_path/build/first-app/web/static"
 
     # Invoking build will create wheels as a side effect.
@@ -110,7 +114,8 @@ def test_build_app(build_command, first_app_generated, tmp_path):
                 bundle_path / "www/static/wheels",
                 "-r",
                 bundle_path / "requirements.txt",
-            ],
+            ]
+            + (["-vv"] if logging_level == LogLevel.DEEP_DEBUG else []),
             check=True,
             encoding="UTF-8",
         ),

Include `pyproject.toml` in the log file
### What is the problem or limitation you are having?

When the Briefcase log file doesn't provide information I'm interested in, it will likely be in the project's `pyproject.toml`. For instance, what `requires` is set to.

### Describe the solution you'd like

Append the contents of `pyproject.toml` to the log file.

An alternative to this would be dumping the `AppConfig` object.

### Describe alternatives you've considered

Continue requesting such information specifically.

### Additional context

_No response_
tests/commands/create/test_install_app_requirements.py::test_app_packages_install_requirements[LogLevel.DEEP_DEBUG] tests/commands/dev/test_install_dev_requirements.py::test_install_requirements_no_error[LogLevel.DEEP_DEBUG] tests/console/test_Log.py::test_save_log_to_file_no_exception tests/console/test_Log.py::test_save_log_to_file_missing_pyproject tests/platforms/web/static/test_build.py::test_build_app[LogLevel.DEEP_DEBUG]
tests/commands/create/test_install_app_requirements.py::test_bad_path_index tests/commands/create/test_install_app_requirements.py::test_app_packages_no_requires tests/commands/create/test_install_app_requirements.py::test_app_packages_empty_requires tests/commands/create/test_install_app_requirements.py::test_app_packages_valid_requires tests/commands/create/test_install_app_requirements.py::test_app_packages_valid_requires_no_support_package tests/commands/create/test_install_app_requirements.py::test_app_packages_invalid_requires tests/commands/create/test_install_app_requirements.py::test_app_packages_offline tests/commands/create/test_install_app_requirements.py::test_app_packages_install_requirements[LogLevel.INFO] tests/commands/create/test_install_app_requirements.py::test_app_packages_replace_existing_requirements tests/commands/create/test_install_app_requirements.py::test_app_requirements_no_requires tests/commands/create/test_install_app_requirements.py::test_app_requirements_empty_requires tests/commands/create/test_install_app_requirements.py::test_app_requirements_requires tests/commands/create/test_install_app_requirements.py::test__is_local_requirement_altsep_respected[None-asdf/xcvb-True] tests/commands/create/test_install_app_requirements.py::test__is_local_requirement_altsep_respected[None-asdf>xcvb-False] tests/commands/create/test_install_app_requirements.py::test__is_local_requirement_altsep_respected[>-asdf/xcvb-True] tests/commands/create/test_install_app_requirements.py::test__is_local_requirement_altsep_respected[>-asdf>xcvb-True] tests/commands/create/test_install_app_requirements.py::test__is_local_requirement_altsep_respected[>-asdf+xcvb-False] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[my-package] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[my-package==1.2.3] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[my-package<=1.2.3] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[my-package[optional]<=1.2.3] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[my-package[optional]<=1.2.3; tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[git+https://github.com/project/package] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[git+https://github.com/project/package#egg=my-package] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[git+https://github.com/project/package@deadbeef#egg=my-package] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[git+https://github.com/project/package@some-branch#egg=my-package] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[http://example.com/path/to/mypackage-1.2.3-py3-none-any.whl] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[https://example.com/path/to/mypackage-1.2.3-py3-none-any.whl] tests/commands/create/test_install_app_requirements.py::test_app_requirements_non_paths[my-package tests/commands/create/test_install_app_requirements.py::test_app_requirements_paths_unix[/absolute/path/to/package] tests/commands/create/test_install_app_requirements.py::test_app_requirements_paths_unix[requirement1] tests/commands/create/test_install_app_requirements.py::test_app_requirements_paths_unix[requirement2] tests/commands/create/test_install_app_requirements.py::test_app_requirements_paths_unix[requirement3] tests/commands/create/test_install_app_requirements.py::test_app_packages_test_requires tests/commands/create/test_install_app_requirements.py::test_app_packages_test_requires_test_mode tests/commands/create/test_install_app_requirements.py::test_app_packages_only_test_requires_test_mode tests/commands/dev/test_install_dev_requirements.py::test_install_requirements_no_error[LogLevel.INFO] tests/commands/dev/test_install_dev_requirements.py::test_install_requirements_error tests/commands/dev/test_install_dev_requirements.py::test_no_requirements tests/commands/dev/test_install_dev_requirements.py::test_install_requirements_test_mode tests/commands/dev/test_install_dev_requirements.py::test_only_test_requirements tests/console/test_Log.py::test_log_level[-1-False-False-False] tests/console/test_Log.py::test_log_level[0-False-False-False] tests/console/test_Log.py::test_log_level[LogLevel.INFO-False-False-False] tests/console/test_Log.py::test_log_level[1-True-False-False] tests/console/test_Log.py::test_log_level[LogLevel.VERBOSE-True-False-False] tests/console/test_Log.py::test_log_level[2-True-True-False] tests/console/test_Log.py::test_log_level[LogLevel.DEBUG-True-True-False] tests/console/test_Log.py::test_log_level[3-True-True-True] tests/console/test_Log.py::test_log_level[LogLevel.DEEP_DEBUG-True-True-True] tests/console/test_Log.py::test_log_level[4-True-True-True] tests/console/test_Log.py::test_log_level[5-True-True-True] tests/console/test_Log.py::test_info_logging tests/console/test_Log.py::test_verbose_logging tests/console/test_Log.py::test_debug_logging tests/console/test_Log.py::test_capture_stacktrace tests/console/test_Log.py::test_capture_stacktrace_for_briefcaseerror[True] tests/console/test_Log.py::test_capture_stacktrace_for_briefcaseerror[False] tests/console/test_Log.py::test_save_log_to_file_do_not_log tests/console/test_Log.py::test_save_log_to_file_with_exception tests/console/test_Log.py::test_save_log_to_file_with_multiple_exceptions tests/console/test_Log.py::test_save_log_to_file_extra tests/console/test_Log.py::test_save_log_to_file_extra_interrupted tests/console/test_Log.py::test_save_log_to_file_fail_to_make_logs_dir tests/console/test_Log.py::test_save_log_to_file_fail_to_write_file tests/console/test_Log.py::test_log_with_context tests/console/test_Log.py::test_log_error_with_context tests/console/test_Log.py::test_stdlib_logging_config[LogLevel.DEEP_DEBUG-True] tests/console/test_Log.py::test_stdlib_logging_config[LogLevel.DEBUG-False] tests/console/test_Log.py::test_stdlib_logging_config[LogLevel.VERBOSE-False] tests/console/test_Log.py::test_stdlib_logging_config[LogLevel.INFO-False] tests/console/test_Log.py::test_stdlib_logging_only_one tests/console/test_Log.py::test_stdlib_logging_handler_writes_to_debug tests/platforms/web/static/test_build.py::test_build_app[LogLevel.INFO] tests/platforms/web/static/test_build.py::test_build_app_custom_pyscript_toml tests/platforms/web/static/test_build.py::test_build_app_invalid_custom_pyscript_toml tests/platforms/web/static/test_build.py::test_build_app_missing_wheel_dir tests/platforms/web/static/test_build.py::test_build_app_no_requirements tests/platforms/web/static/test_build.py::test_app_package_fail tests/platforms/web/static/test_build.py::test_dependency_fail