diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f95b7cdf..1f2f8c10 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
@@ -10,34 +10,33 @@ repos:
     -   id: name-tests-test
     -   id: requirements-txt-fixer
 -   repo: https://github.com/asottile/reorder-python-imports
-    rev: v3.14.0
+    rev: v3.16.0
     hooks:
     -   id: reorder-python-imports
-        args: [--py39-plus, --add-import, 'from __future__ import annotations']
+        args: [--py310-plus, --add-import, 'from __future__ import annotations']
     -   id: reorder-python-imports
 -   repo: https://github.com/asottile/add-trailing-comma
-    rev: v3.1.0
+    rev: v4.0.0
     hooks:
     -   id: add-trailing-comma
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v3.19.0
+    rev: v3.21.2
     hooks:
     -   id: pyupgrade
-        args: [--py39-plus]
+        args: [--py310-plus]
 -   repo: https://github.com/hhatto/autopep8
-    rev: v2.3.1
+    rev: v2.3.2
     hooks:
     -   id: autopep8
 -   repo: https://github.com/PyCQA/flake8
-    rev: 7.1.1
+    rev: 7.3.0
     hooks:
     -   id: flake8
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.13.0
+    rev: v2.1.0
     hooks:
     -   id: mypy
 -   repo: https://github.com/biomejs/pre-commit
-    rev: v0.5.0
+    rev: v2.5.0
     hooks:
     -   id: biome-check
-        additional_dependencies: ["@biomejs/biome@1.8.1"]
diff --git a/all-repos.yaml b/all-repos.yaml
deleted file mode 100644
index 90eecf56..00000000
--- a/all-repos.yaml
+++ /dev/null
@@ -1,249 +0,0 @@
-# This file is used to generate all-hooks.json
-- https://github.com/pre-commit/pre-commit-hooks
-- https://github.com/pre-commit/mirrors-clang-format
-- https://github.com/pre-commit/mirrors-csslint
-- https://github.com/pre-commit/mirrors-eslint
-- https://github.com/pre-commit/mirrors-fixmyjs
-- https://github.com/pre-commit/mirrors-jshint
-- https://github.com/pre-commit/mirrors-mypy
-- https://github.com/pre-commit/mirrors-puppet-lint
-- https://github.com/pre-commit/mirrors-scss-lint
-- https://github.com/pre-commit/mirrors-yapf
-- https://github.com/pre-commit/pygrep-hooks
-- https://github.com/pre-commit/sync-pre-commit-deps
-- https://github.com/FalconSocial/pre-commit-mirrors-pep257
-- https://github.com/FalconSocial/pre-commit-python-sorter
-- https://github.com/MarketSquare/robotframework-tidy
-- https://github.com/guykisel/prospector-mirror
-- https://github.com/asottile/add-trailing-comma
-- https://github.com/asottile/pyupgrade
-- https://github.com/asottile/reorder-python-imports
-- https://github.com/asottile/yesqa
-- https://github.com/asottile/dead
-- https://github.com/asottile/setup-cfg-fmt
-- https://github.com/asottile/cheetah_lint
-- https://github.com/digitalpulp/pre-commit-php
-- https://github.com/elidupuis/mirrors-jscs
-- https://github.com/elidupuis/mirrors-sass-lint
-# - https://github.com/jumanjihouse/pre-commit-hooks
-- https://github.com/jumanjihouse/pre-commit-hook-yamlfmt
-- https://github.com/Lucas-C/pre-commit-hooks
-# - https://github.com/Lucas-C/pre-commit-hooks-java
-- https://github.com/Lucas-C/pre-commit-hooks-lxml
-# - https://github.com/Lucas-C/pre-commit-hooks-markup
-# - https://github.com/Lucas-C/pre-commit-hooks-nodejs
-- https://github.com/Lucas-C/pre-commit-hooks-safety
-- https://github.com/chriskuehl/puppet-pre-commit-hooks
-- https://github.com/golangci/golangci-lint
-- https://github.com/Bahjat/pre-commit-golang
-- https://github.com/dnephin/pre-commit-golang
-- https://github.com/troian/pre-commit-golang
-- https://github.com/jstewmon/check-swagger
-- https://github.com/detailyang/pre-commit-shell
-- https://github.com/lovesegfault/beautysh
-- https://github.com/antonbabenko/pre-commit-terraform
-- https://github.com/ansible-community/ansible-lint
-- https://github.com/doublify/pre-commit-clang-format
-- https://github.com/doublify/pre-commit-go
-- https://github.com/doublify/pre-commit-hindent
-- https://github.com/doublify/pre-commit-rust
-- https://github.com/awebdeveloper/pre-commit-stylelint
-- https://github.com/awebdeveloper/pre-commit-tslint
-- https://github.com/adrienverge/yamllint
-- https://github.com/thlorenz/doctoc
-- https://github.com/noahsark769/xcodeproj-sort-pre-commit-hook
-- https://github.com/jorisroovers/gitlint
-- https://github.com/psf/black
-- https://github.com/IamTheFij/ansible-pre-commit
-- https://github.com/IamTheFij/docker-pre-commit
-- https://github.com/mattlqx/pre-commit-ruby
-- https://github.com/mattlqx/pre-commit-sign
-- https://github.com/mattlqx/pre-commit-search-and-replace
-- https://github.com/pryorda/dockerfilelint-precommit-hooks
-- https://github.com/alessandrojcm/commitlint-pre-commit-hook
-- https://github.com/henryykt/pre-commit-perl
-- https://github.com/juancarlospaco/pre-commit-nim
-- https://github.com/aws-cloudformation/cfn-lint
-- https://github.com/thoughtworks/talisman
-- https://github.com/PyCQA/flake8
-- https://github.com/PyCQA/bandit
-- https://github.com/PyCQA/pydocstyle
-- https://github.com/PyCQA/pylint
-- https://github.com/PyCQA/doc8
-- https://github.com/PyCQA/prospector
-- https://github.com/PyCQA/isort
-- https://github.com/PyCQA/docformatter
-- https://github.com/PyCQA/autoflake
-- https://github.com/miki725/importanize
-- https://github.com/motet-a/jinjalint
-- https://github.com/milin/giticket
-- https://github.com/milin/gitown
-- https://github.com/sqlalchemyorg/zimports
-- https://github.com/peterdemin/pip-compile-multi
-- https://github.com/homebysix/pre-commit-macadmin
-- https://github.com/fortman/pre-commit-prometheus
-- https://github.com/syntaqx/git-hooks
-- https://github.com/lunarmodules/luacheck
-- https://github.com/Koihik/LuaFormatter
-- https://github.com/Calinou/pre-commit-luacheck
-- https://github.com/belminf/pre-commit-chef
-- https://github.com/pocc/pre-commit-hooks
-- https://github.com/dwightgunning/pre-commit-nglint
-- https://github.com/codespell-project/codespell
-- https://gitlab.com/smop/pre-commit-hooks
-- https://github.com/seddonym/import-linter
-- https://github.com/marco-c/taskcluster_yml_validator
-- https://github.com/rstcheck/rstcheck
-- https://github.com/lorenzwalthert/precommit
-- https://github.com/lorenzwalthert/gitignore-tidy
-- https://github.com/FelixSeptem/pre-commit-golang
-- https://gitlab.com/daverona/pre-commit/cpp
-- https://github.com/codingjoe/relint
-- https://github.com/nix-community/nixpkgs-fmt
-- https://github.com/d6e/beancount-check
-- https://gitlab.com/iamlikeme/nbhooks
-- https://github.com/Vimjas/vint
-- https://github.com/eschulte/lisp-format
-- https://github.com/shellcheck-py/shellcheck-py
-- https://github.com/APIDevTools/swagger-cli
-- https://github.com/kynan/nbstripout
-- https://gitlab.com/devopshq/gitlab-ci-linter
-- https://github.com/bmorcos/pre-commit-hooks-cpp
-- https://github.com/igorshubovych/markdownlint-cli
-- https://github.com/TekWizely/pre-commit-golang
-- https://github.com/markdownlint/markdownlint
-- https://github.com/jguttman94/pre-commit-gradle
-- https://github.com/Yelp/detect-secrets
-- https://github.com/dmitri-lerko/pre-commit-docker-kustomize
-- https://github.com/perltidy/perltidy
-- https://github.com/talos-systems/conform
-- https://github.com/twu/skjold
-- https://github.com/commitizen-tools/commitizen
-- https://github.com/gherynos/pre-commit-java
-- https://github.com/lietu/go-pre-commit
-- https://github.com/macisamuele/language-formatters-pre-commit-hooks
-- https://github.com/jlebar/pre-commit-hooks
-- https://github.com/jazzband/pip-tools
-- https://github.com/pappasam/toml-sort
-- https://github.com/arenadotio/pre-commit-ocamlformat
-- https://github.com/hcodes/yaspeller
-- https://github.com/maltzj/google-style-precommit-hook
-- https://github.com/jvstein/pre-commit-dotnet-format
-- https://github.com/PeterMosmans/jenkinslint
-- https://github.com/nicklockwood/SwiftFormat
-- https://github.com/executablebooks/mdformat
-- https://gitlab.com/daverona/pre-commit/php
-- https://github.com/anderseknert/pre-commit-opa
-- https://github.com/radix-ai/auto-smart-commit
-- https://github.com/thibaudcolas/curlylint
-- https://github.com/cheshirekow/cmake-format-precommit
-- https://github.com/aorumbayev/pydantic-to-schema
-- https://github.com/hadialqattan/pycln
-- https://github.com/nbQA-dev/nbQA
-- https://github.com/Scony/godot-gdscript-toolkit
-- https://github.com/avilaton/add-msg-issue-prefix-hook
-- https://github.com/dustinsand/pre-commit-jvm
-- https://github.com/alan-turing-institute/CleverCSV-pre-commit
-- https://gitlab.com/jvenom/elixir-pre-commit-hooks
-- https://github.com/Cretezy/flutter-format-pre-commit
-- https://github.com/dluksza/flutter-analyze-pre-commit
-- https://github.com/fluttercommunity/import_sorter
-- https://github.com/editorconfig-checker/editorconfig-checker.python
-- https://gitlab.com/pablodiehl/pre-commit-lua-formatter
-- https://github.com/frnmst/md-toc
-- https://github.com/mgedmin/check-manifest
-# - https://github.com/ecugol/pre-commit-hooks-django
-- https://github.com/PrincetonUniversity/blocklint
-- https://github.com/python-jsonschema/check-jsonschema
-- https://github.com/sirosen/texthooks
-- https://github.com/snok/pep585-upgrade
-- https://github.com/jendrikseipp/vulture
-- https://github.com/mwouts/jupytext
-- https://github.com/ejba/pre-commit-maven
-- https://github.com/tfsec/tfsec
-- https://github.com/yoheimuta/protolint
-- https://github.com/hadolint/hadolint
-- https://github.com/google/go-jsonnet
-- https://github.com/google/yamlfmt
-- https://github.com/guid-empty/flutter-dependency-validation-pre-commit
-- https://github.com/cpplint/cpplint
-- https://github.com/MarcoGorelli/absolufy-imports
-- https://github.com/MarcoGorelli/auto-walrus
-- https://github.com/MarcoGorelli/cython-lint
-- https://github.com/domdfcoding/flake2lint
-- https://github.com/dotnet/format
-- https://github.com/ashwin153/pre-commit-vagrant
-- https://github.com/AleksaC/hadolint-py
-- https://github.com/AleksaC/circleci-cli-py
-- https://github.com/AleksaC/mirrors-cfn-nag
-- https://github.com/cmake-lint/cmake-lint
-- https://github.com/priv-kweihmann/oelint-adv
-- https://github.com/jggomez/pre-commit-android-kotlin
-- https://github.com/Carreau/velin
-- https://github.com/chrismgrayftsinc/jsonnetfmt
-- https://github.com/zricethezav/gitleaks
-- https://github.com/hugoh/pre-commit-fish
-# - https://github.com/nbyl/pre-commit-license-checks
-# - https://github.com/jonasbb/pre-commit-latex-hooks
-- https://github.com/dfm/black_nbconvert
-- https://github.com/crate-ci/typos
-- https://github.com/snakemake/snakefmt
-- https://github.com/regebro/pyroma
-- https://github.com/tox-dev/tox-ini-fmt
-- https://github.com/janosh/format-ipy-cells
-- https://github.com/FalcoSuessgott/lint-gitlab-ci
-- https://github.com/comkieffer/xml-linter-hook
-- https://github.com/jackdewinter/pymarkdown
-- https://github.com/klieret/jekyll-relative-url-check
-- https://github.com/tarioch/flux-check-hook
-- https://github.com/streetsidesoftware/cspell-cli
-- https://github.com/rapidsai/frigate
-- https://github.com/norwoodj/helm-docs
-- https://github.com/sqlfluff/sqlfluff
-- https://github.com/adamchainz/blacken-docs
-- https://github.com/adamchainz/django-upgrade
-- https://github.com/scop/pre-commit-shfmt
-- https://github.com/scop/pre-commit-perlcritic
-- https://github.com/BlankSpruce/gersemi
-- https://github.com/realm/SwiftLint
-- https://gitlab.com/bmares/check-json5
-- https://github.com/semaphor-dk/dansabel
-- https://github.com/gitguardian/gg-shield
-- https://github.com/JohnnyMorganz/StyLua
-- https://github.com/shssoichiro/oxipng
-- https://github.com/datarootsio/databooks
-- https://github.com/standard/standard
-- https://github.com/Sceptre/sceptrelint
-- https://github.com/lyz-code/yamlfix
-- https://github.com/dannysepler/rm_unneeded_f_str
-- https://github.com/cmhughes/latexindent.pl
-- https://github.com/sirwart/ripsecrets
-- https://github.com/bagerard/graphviz-dot-hooks
-- https://github.com/omnilib/ufmt
-- https://github.com/daveshanley/vacuum
-- https://github.com/nuztalgia/botstrap
-- https://gitlab.com/adam-moss/pre-commit-trailer
-- https://gitlab.com/adam-moss/pre-commit-ssh-git-signing-key
-- https://github.com/astral-sh/ruff-pre-commit
-- https://github.com/mrtazz/checkmake
-- https://github.com/jshwi/docsig
-- https://github.com/finsberg/clang-format-docs
-- https://github.com/rubocop/rubocop
-- https://github.com/dbt-checkpoint/dbt-checkpoint
-- https://gitlab.com/engmark/vcard
-- https://github.com/Data-Liberation-Front/csvlint.rb
-- https://github.com/christopher-hacker/enforce-notebook-run-order
-- https://github.com/mxr/unkey
-- https://github.com/Mateusz-Grzelinski/actionlint-py
-- https://github.com/andrewring/github-distributed-owners
-- https://github.com/Mermeid-Designs/pydantic-hooks
-- https://github.com/igrr/astyle_py
-- https://gitlab.com/codementors/pre-commit/add-issue-number-to-conventional-commit
-- https://github.com/numpy/numpydoc
-- https://github.com/hakancelikdev/unimport
-- https://github.com/hakancelikdev/unexport
-- https://github.com/KindDragon/gn-build-py
-- https://github.com/stefmolin/exif-stripper
-- https://github.com/hhatto/autopep8
-- https://github.com/rhysd/actionlint
-- https://github.com/hija/clean-dotenv
diff --git a/biome.json b/biome.json
index 03e2df98..e99b718f 100644
--- a/biome.json
+++ b/biome.json
@@ -1,7 +1,11 @@
 {
-    "$schema": "https://biomejs.dev/schemas/1.4.0/schema.json",
-    "organizeImports": {
-        "enabled": false
+    "$schema": "https://biomejs.dev/schemas/2.4.15/schema.json",
+    "assist": {
+        "actions": {
+            "source": {
+                "organizeImports": "off"
+            }
+        }
     },
     "formatter": {
         "indentStyle": "space",
diff --git a/sections/advanced.md b/sections/advanced.md
index 6d1f1f65..646f2ac1 100644
--- a/sections/advanced.md
+++ b/sections/advanced.md
@@ -272,7 +272,7 @@ For example:
     hooks:
     -   id: check-requirements
         name: check requirements files
-        language: system
+        language: unsupported
         entry: python -m scripts.check_requirements --compare
         files: ^requirements.*\.txt$
 ```
@@ -291,7 +291,7 @@ You can configure repository-local hooks by specifying the [`repo`](#repos-repo)
 sentinel `local`.
 
 local hooks can use any language which supports [`additional_dependencies`](#config-additional_dependencies)
-or [`docker_image`](#docker_image) / [`fail`](#fail) / [`pygrep`](#pygrep) / [`script`](#script) / [`system`](#system).
+or [`docker_image`](#docker_image) / [`fail`](#fail) / [`pygrep`](#pygrep) / [`unsupported`](#unsupported) / [`unsupported_script`](#unsupported_script).
 This enables you to install things which previously would require a trivial
 mirror repository.
 
@@ -307,13 +307,13 @@ Here's an example configuration with a few `local` hooks:
     -   id: pylint
         name: pylint
         entry: pylint
-        language: system
+        language: unsupported
         types: [python]
         require_serial: true
     -   id: check-x
         name: Check X
         entry: ./bin/check-x.sh
-        language: script
+        language: unsupported_script
         files: \.x$
     -   id: scss-lint
         name: scss-lint
@@ -352,8 +352,173 @@ The currently available `meta` hooks:
         debugging.
 ```
 
+## `pre-commit hazmat`
+
+"hazardous materials"
+
+pre-commit provides a few `entry` prefix "helpers" for unusual situations.
+
+in case it's not clear, using these is _usually_ a bad idea.
+
+_note_: hazmat helpers do not work on languages which adjust `entry` (`docker`
+/ `docker_image` / `fail` / `julia` / `pygrep` / `r` / `unsupported_script`).
+
+### `pre-commit hazmat cd`
+
+_new in 4.5.0_
+
+for "monorepo" usage one can use this to target a subdirectory.
+
+this entry prefix will cd to the target subdir and adjust filename arguments
+
+example usage:
+
+```yaml
+# recommended:
+# minimum_pre_commit_version: 4.5.0
+repos:
+-   repo: ...
+    rev: ...
+    hooks:
+    -   id: example
+        alias: example-repo1
+        name: example (repo1)
+        files: ^repo1/
+        # important! ends with `--`
+        # important! copy `args: [...]` to entry and blank out `args: []`
+        entry: pre-commit hazmat cd repo1 example-bin --arg1 --
+        args: []
+
+    -   id: example
+        alias: example-repo2
+        name: example (repo2)
+        files: ^repo2/
+        entry: pre-commit hazmat cd repo2 example-bin --arg1 --
+        args: []
+
+    # ... etc.
+```
+
+### `pre-commit hazmat ignore-exit-code`
+
+_new in 4.5.0_
+
+it's a bad idea to introduce warning noise but this gives you a way to do it.
+
+example:
+
+```yaml
+# recommended:
+# minimum_pre_commit_version: 4.5.0
+repos:
+-   repo: ...
+    rev: ...
+    hooks:
+    -   id: example
+        # important! copy `args: [...]` to entry and blank out `args: []`
+        entry: pre-commit hazmat ignore-exit-code example-bin --arg1 --
+        args: []
+        # otherwise the output will always be hidden
+        verbose: true
+```
+
+### `pre-commit hazmat n1`
+
+_new in 4.5.0_
+
+some hooks only take one filename argument.  this runs them one at a time
+(which is super slow!)
+
+example:
+
+```yaml
+# recommended:
+# minimum_pre_commit_version: 4.5.0
+repos:
+-   repo: ...
+    rev: ...
+    hooks:
+    -   id: example
+        # important! ends with `--`
+        # important! copy `args: [...]` to entry and blank out `args: []`
+        entry: pre-commit hazmat n1 example-bin --arg1 --
+        args: []
+```
+
+## usage with git 2.54+ hook configuration
+
+_new in 4.6.0_: pre-commit improved support for `git config`-based hooks.
+a later version will change `pre-commit install` to use this approach.
+
+[git 2.54] introduced a new way to install git hook tools via `git config`.
+
+the basic gist is the following enables a hook in a git repo:
+
+```bash
+git config set hook.<name>.event pre-push
+git config set hook.<name>.command 'some command here'
+```
+
+an example setup with `pre-commit` might look like:
+
+```bash
+# note, the "hook" name here is `pre-commit.pre-commit`
+# for the `pre-commit` "tool" and the `pre-commit` "event"
+git config set hook.pre-commit.pre-commit.event pre-commit
+git config set hook.pre-commit.pre-commit.command 'pre-commit hook-impl --hook-type pre-commit --'
+
+# please follow that naming scheme for future compatibility with `pre-commit install`
+
+# an example with pre-push:
+#
+# git config set hook.pre-commit.pre-push.event pre-push
+# git config set hook.pre-commit.pre-push.command 'pre-commit hook-impl --hook-type pre-push --'
+```
+
+`pre-commit hook-impl` is a "hidden" implementation command with these options:
+- `--hook-type ...`: the [hook type](#supported-git-hooks) to use
+- `--config ...`: (optional) path to `.pre-commit-config.yaml`
+- `--skip-on-missing-config`: silently pass when a config is missing
+
+some interesting applications of this:
+
+### "global" installation of pre-commit
+
+with `git config set --global ...` this can automatically enable pre-commit
+for all repositories:
+
+```bash
+git config set --global hook.pre-commit.pre-commit.event pre-commit
+git config set --global hook.pre-commit.pre-commit.command 'pre-commit hook-impl --hook-type pre-commit --skip-on-missing-config --'
+```
+
+- this setup **not recommended** as it can lead to accidentally running hooks
+  when interacting with an untrusted repository.
+- `--skip-on-missing-config` is recommended here as arbitrary git repositories
+  may not have a `.pre-commit-config.yaml`.
+
+### always running a hook on all files
+
+since you can configure pre-commit as many times as you want you *could* invoke
+pre-commit to run a particular hook always and on all files
+
+```bash
+git config set hook.pre-commit.pre-commit-always.event pre-commit
+git config set hook.pre-commit.pre-commit-always.command 'pre-commit run hookid --hook-stage pre-commit --all-files'
+```
+
+*note*: this is not recommended as it has the tendancy to be slow and deviates
+from the normal expectations of pre-commit.
+
+[git 2.54]: https://github.blog/open-source/git/highlights-from-git-2-54/#h-config-based-hooks
+
 ## automatically enabling pre-commit on repositories
 
+*note*: if you are on a new-enough version of `git` you may want to use
+[this approach](#global-installation-of-pre-commit) instead.
+
+___
+
 `pre-commit init-templatedir` can be used to set up a skeleton for `git`'s
 `init.templateDir` option.  This means that any newly cloned repository will
 automatically have the hooks set up without the need to run
diff --git a/sections/cli.md b/sections/cli.md
index a644a0ae..56b74d76 100644
--- a/sections/cli.md
+++ b/sections/cli.md
@@ -233,3 +233,11 @@ Uninstall the pre-commit script.
 Options:
 
 - `-t HOOK_TYPE, --hook-type HOOK_TYPE`: which hook type to uninstall.
+
+## pre-commit validate-config [options] [filenames ...] #pre-commit-validate-config
+
+Validate .pre-commit-config.yaml files
+
+## pre-commit validate-manifest [options] [filenames ...] #pre-commit-validate-manifest
+
+Validate .pre-commit-hooks.yaml files
diff --git a/sections/hooks.md b/sections/hooks.md
index 828e9db9..a045f6f6 100644
--- a/sections/hooks.md
+++ b/sections/hooks.md
@@ -54,11 +54,11 @@ for shell scripts:
 for the web:
 - [biomejs/pre-commit]: a fast formatter / fixer written in rust
 - [standard/standard]: linter / fixer
-- [shssoichiro/oxipng]: optimize png files
+- [oxipng/oxipng]: optimize png files
 
 [biomejs/pre-commit]: https://github.com/biomejs/pre-commit
 [standard/standard]: https://github.com/standard/standard
-[shssoichiro/oxipng]: https://github.com/shssoichiro/oxipng
+[oxipng/oxipng]: https://github.com/oxipng/oxipng
 
 for configuration files:
 - [python-jsonschema/check-jsonschema]: check many common configurations with jsonschema
@@ -75,13 +75,15 @@ for text / docs / prose:
 - [crate-ci/typos]: find and fix common typographical errors
 - [thlorenz/doctoc]: generate a table-of-contents in markdown files
 - [amperser/proselint]: A linter for prose.
-- [markdownlint/markdownlint]: a Markdown lint tool
+- [markdownlint/markdownlint]: a Markdown lint tool in Ruby
+- [DavidAnson/markdownlint-cli2]: a Markdown lint tool in Node
 - [codespell-project/codespell]: check code for common misspellings
 
 [crate-ci/typos]: https://github.com/crate-ci/typos
 [thlorenz/doctoc]: https://github.com/thlorenz/doctoc
 [amperser/proselint]: https://github.com/amperser/proselint
 [markdownlint/markdownlint]: https://github.com/markdownlint/markdownlint
+[DavidAnson/markdownlint-cli2]: https://github.com/DavidAnson/markdownlint-cli2
 [codespell-project/codespell]: https://github.com/codespell-project/codespell
 
 for linting commit messages:
@@ -136,7 +138,7 @@ for example, here's some searches you may find useful using [sourcegraph]:
 
 - hooks which run on python files: [`file:^\.pre-commit-hooks\.yaml$ "types: [python]"`](https://sourcegraph.com/search?q=context:global+file:^\.pre-commit-hooks\.yaml%24+%22types:+[python]%22)
 - hooks which run on shell files: [`file:^\.pre-commit-hooks\.yaml$ "types: [shell]"`](https://sourcegraph.com/search?q=context:global+file:^\.pre-commit-hooks\.yaml%24+"types:+[shell]")
-- pre-commit configurations in popular projects: [`file:^\.pre-commit-config\.yaml$`](https://sourcegraph.com/search?q=context:global+file:^\.pre-commit-hooks\.yaml%24+"types:+[shell]")
+- pre-commit configurations in popular projects: [`file:^\.pre-commit-config\.yaml$`](https://sourcegraph.com/search?q=context:global+file:^\.pre-commit-hooks\.yaml)
 
 [sourcegraph]: https://sourcegraph.com/search
 
@@ -159,7 +161,7 @@ you may send [a pull request] to expand this list however there are a few
 requirements you *must* follow or your PR will be closed without comment:
 
 - the tool must already be fairly popular (>500 stars)
-- the tool must use a managed language (no `system` / `script` / `docker` hooks)
+- the tool must use a managed language (no `unsupported` / `unsupported_script` / `docker` hooks)
 - the tool must operate on files
 
 [a pull request]: https://github.com/pre-commit/pre-commit.com/blob/main/sections/hooks.md
diff --git a/sections/new-hooks.md b/sections/new-hooks.md
index a1f5604e..7f21d439 100644
--- a/sections/new-hooks.md
+++ b/sections/new-hooks.md
@@ -4,6 +4,9 @@ installable package (gem, npm, pypi, etc.) or exposes an executable, it can be
 used with pre-commit. Each git repo can support as many languages/hooks as you
 want.
 
+_new in 2.5.0_: `pre-commit` sets the `PRE_COMMIT=1` environment variable
+during hook execution.
+
 The hook must exit nonzero on failure or modify files.
 
 A git repo containing pre-commit plugins must contain a `.pre-commit-hooks.yaml`
@@ -146,6 +149,7 @@ Hello from foo hook!
 - [fail](#fail)
 - [golang](#golang)
 - [haskell](#haskell)
+- [julia](#julia)
 - [lua](#lua)
 - [node](#node)
 - [perl](#perl)
@@ -155,8 +159,8 @@ Hello from foo hook!
 - [rust](#rust)
 - [swift](#swift)
 - [pygrep](#pygrep)
-- [script](#script)
-- [system](#system)
+- [unsupported](#unsupported)
+- [unsupported_script](#unsupported_script)
 
 ### conda
 
@@ -330,6 +334,45 @@ This language supports `additional_dependencies` so it can be used as a
 __Support:__ haskell hooks are known to work on any system which has `cabal`
 installed.  It has been tested on linux, macOS, and windows.
 
+### julia
+
+_new in 4.1.0_
+
+For configuring julia hooks, your [`entry`](#hooks-entry) should be a path to a julia source
+file relative to the hook repository (optionally with arguments).
+
+Hooks run in an isolated package environment defined by a `Project.toml` file (optionally
+with a `Manifest.toml` file) in the hook repository. If no `Project.toml` file is found the
+hook is run in an empty environment.
+
+Julia hooks support [`additional_dependencies`](#config-additional_dependencies) which can
+be used to augment, or override, the existing environment in the hooks repository. This also
+means that julia can be used as a `repo: local` hook. `additional_dependencies` are passed
+to `pkg> add` and should be specified using
+[Pkg REPL mode syntax](https://pkgdocs.julialang.org/v1/repl/#repl-add).
+
+Examples:
+
+```yaml
+- id: foo-without-args
+  name: ...
+  language: julia
+  entry: bin/foo.jl
+- id: bar-with-args
+  name: ...
+  language: julia
+  entry: bin/bar.jl --arg1 --arg2
+- id: baz-with-extra-deps
+  name: ...
+  language: julia
+  entry: bin/baz.jl
+  additional_dependencies:
+   - 'ExtraDepA@1'
+   - 'ExtraDepB@2.4'
+```
+
+__Support:__ julia hooks are known to work on any system which has `julia` installed.
+
 ### lua
 
 Lua hooks are installed with the version of Lua that is used by Luarocks.
@@ -453,23 +496,27 @@ To require all files to match, use `args: [--negate]`.
 __Support:__ pygrep hooks are supported on all platforms which pre-commit runs
 on.
 
-### script
+### unsupported
 
-Script hooks provide a way to write simple scripts which validate files. The
-[`entry`](#hooks-entry) should be a path relative to the root of the hook repository.
+[anchor](__#system)
+_new in 4.4.0_: previously `language: system`.  the alias will be removed in a
+future version
+
+System hooks provide a way to write hooks for system-level executables which
+don't have a supported language above (or have special environment
+requirements that don't allow them to run in isolation such as pylint).
 
 This hook type will not be given a virtual environment to work with – if it
 needs additional dependencies the consumer must install them manually.
 
-__Support:__ the support of script hooks depend on the scripts themselves.
+### unsupported_script
 
-### system
+[anchor](__#script)
+_new in 4.4.0_: previously `language: script`.  the alias will be removed in a
+future version
 
-System hooks provide a way to write hooks for system-level executables which
-don't have a supported language above (or have special environment
-requirements that don't allow them to run in isolation such as pylint).
+Script hooks provide a way to write simple scripts which validate files. The
+[`entry`](#hooks-entry) should be a path relative to the root of the hook repository.
 
 This hook type will not be given a virtual environment to work with – if it
 needs additional dependencies the consumer must install them manually.
-
-__Support:__ the support of system hooks depend on the executables.
diff --git a/template_lib.py b/template_lib.py
index 05a26c61..72286d70 100644
--- a/template_lib.py
+++ b/template_lib.py
@@ -12,7 +12,7 @@
 
 
 ID_RE = re.compile(r' #([a-z0-9-]+)$')
-SPECIAL_CHARS_RE = re.compile('[^a-z0-9 _-]')
+SPECIAL_CHARS_RE = re.compile('(&[a-z]+;|[^a-z0-9 _-])')
 
 
 ROW = '=r='