None of these are exported (not in any __all__) or referenced anywhere
in the package, tests, docs, or examples:

- utils/text.py: _col_chunks, _find_optimal, _get_or_default -- leftovers
  of the old columnize() implementation that no longer exists (drop the
  now-unused Dict/TypeVar imports too).
- utils/frame.py: extract_vars, extract_vars_above, debugx.
- core/display.py: _webpxy -- a WEBP-header reader that was never wired
  into Image._retina_shape() (which only branches on PNG/JPEG/GIF).
- extensions/autoreload.py: StrongRef -- module only uses weakref.ref.
- terminal/embed.py: _Sentinel -- unused, and its __repr__ returned the
  builtin repr rather than self.repr, proving it was never exercised.

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8

Drop ~50 dead module-level imports flagged by `ruff check --select F401`
across implementation modules (e.g. a large stale `from ast import ...`
block in magics/execution.py, and unused typing/stdlib imports in
ultratb.py, text.py, io.py, and others).

Re-export facades were deliberately left untouched: utils/process.py, the
`.capture` re-exports in utils/io.py (relied on by the test suite), the
testing decorator re-exports, and the package __init__ re-exports.

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8

Delete four unreferenced scripts (no CI, docs, Makefile, or pre-commit
reference any of them):

- check_sources.py: ImportErrors on the first line -- it imports the
  long-removed IPython.external.path. Its tab/CR checks are now handled
  by pre-commit and .editorconfig.
- testupload: Python-2-era helper (from __future__, execfile) that scp'd
  releases to the retired archive.ipython.org host; superseded by PyPI
  trusted publishing.
- make_tarball.py: git-archive tarball builder superseded by
  `python -m build` + retar.py.
- autoformat_file: one-off pyupgrade/black --target py36 migration helper;
  its job is long done and recorded in .git-blame-ignore-revs.

Also drop the now-unused archive_* SSH constants and the execfile() shim
from toollib.py (only testupload used them); build_release still uses
sh/cd/get_ipdir/build_command.

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8

- pyproject.toml: drop nine pytest `--ignore` entries that point at files
  removed long ago (IPython/html/widgets/*, IPython/terminal/console.py,
  IPython/utils/daemonize.py, IPython/kernel, IPython/consoleapp.py,
  IPython/lib/kernel.py, IPython/utils/signatures.py,
  IPython/utils/version.py), and the matching `IPython.utils.version`
  mypy override for a module that no longer exists.
- setup.cfg: remove the [velin] section -- velin is not used anywhere in
  CI, pre-commit, or docs.
- setup.py: drop the obsolete 2017-era pip-version probe (pip >= 9.0.1)
  from the Python-version guard, and remove the unused bdist_rpm branch.

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8

Source files default to UTF-8 since Python 3 (PEP 3120), so the
`# -*- coding: utf-8 -*-` / `# encoding: utf-8` magic comments are no-ops.
Strip them from the 51 package modules that still carried one (the
generated core/latex_symbols.py and its generator tools/gen_latex_symbols.py
are updated together to stay consistent).

Also fix two docstrings that documented a parameter type as `basestring`
(a Python 2 builtin that no longer exists) -> `str`; in text.py the
docstring even contradicted the function's own `str` signature.

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8

These modules have no internal consumers and only exist as compatibility
redirects:

- utils/eventful.py, utils/log.py: one-line re-export shims that warn and
  `from traitlets.{eventful,log} import *`.
- utils/jsonutil.py: re-export shim to jupyter_client.jsonutil, which is
  not even a dependency of IPython -- importing it already failed in a
  base install.
- utils/_process_cli.py: the IronPython (sys.platform == 'cli') process
  backend. IronPython has no Python 3.11 support, so the branch selecting
  it in process.py was unreachable. Drop the module and the 'cli' branch.

Also drop the corresponding pytest --ignore and mypy override entries.

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8

The vendored pickleshare copy carried Python-2 import shims that are dead
on Python 3.11+: the `collections.abc`->`collections` and
`cPickle`->`pickle` try/except fallbacks (the except branches can never
run), plus an unused `sys` import. Replace them with the direct imports.

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8

Correct user-facing docs that pointed at modules, paths, and APIs which
have moved or been removed (each verified against the current tree):

- config/eventloops.rst: the kernel event-loop integration guide used
  IPython.kernel.zmq.* paths; that code lives in ipykernel now (the
  sibling wrapperkernels.rst already uses ipykernel). Update the
  :meth:/:func:/:mod: targets and the "included in IPython" prose.
- interactive/reference.rst: fix the removed IPython.frontend.terminal.embed
  cross-reference (-> IPython.terminal.embed); update the post-mortem
  example off the deprecated color_scheme='Linux' kwarg to theme_name='linux'
  and drop a stray "# TODO: theme" marker left in the sample; point the
  embed-kernel frontend commands at `jupyter qtconsole`/`jupyter console`.
- development/how_ipython_works.rst: `ipython console` -> `jupyter console`.
- config/details.rst: fix the cwd_prompt.py example path (the file is at
  examples/utils/, not the nonexistent IPython/example/utils/).
- config/custommagics.rst: drop a `from __future__ import print_function`
  from the custom-magic example.
- CONTRIBUTING.md: drop the reference to IPython.parallel (spun out to
  ipyparallel years ago).

https://claude.ai/code/session_01GcLWP2cXXDrS49q2kjdcW8