diff --git a/requirements/dev.in b/requirements/dev.in
index db43c35ffe..18de6fe5b4 100644
--- a/requirements/dev.in
+++ b/requirements/dev.in
@@ -57,7 +57,7 @@ python-digitalocean
 pip-tools<6.3.0  # https://github.com/jazzband/pip-tools/pull/1455 breaks our hack for installing specific commits from Git
 
 # zulip's linting framework - zulint
-https://github.com/zulip/zulint/archive/80a613cca5ec35bc5add7f3c70916ce269a9d27c.zip#egg=zulint==0.0.1
+https://github.com/zulip/zulint/archive/34adbc13d54ebeb4291c8f91483f946fce18a160.zip#egg=zulint==0.0.1
 
 -r mypy.in
 
diff --git a/requirements/dev.txt b/requirements/dev.txt
index dd54f789bb..8b9e95deef 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -2398,8 +2398,8 @@ zope.interface==5.4.0 \
     # via
     #   scrapy
     #   twisted
-https://github.com/zulip/zulint/archive/80a613cca5ec35bc5add7f3c70916ce269a9d27c.zip#egg=zulint==0.0.1 \
-    --hash=sha256:e1e03c4599b0848f7e021a6f211d6ee06bf63602cbf25c7bb271ec51c911accf
+https://github.com/zulip/zulint/archive/34adbc13d54ebeb4291c8f91483f946fce18a160.zip#egg=zulint==0.0.1 \
+    --hash=sha256:18dd1fd2d8f5b3feb8468151ccae4c0e8345c77142093988dd96739ac9becac2
     # via -r requirements/dev.in
 https://github.com/zulip/python-zulip-api/archive/0.8.2.zip#egg=zulip==0.8.2+git&subdirectory=zulip \
     --hash=sha256:c85a2c76b265ef66478715bb2a38723c4942f84b2f876c3e0ba916962e3d0735
diff --git a/templates/zerver/help/bots-and-integrations.md b/templates/zerver/help/bots-and-integrations.md
index 5bf3b62b6e..bfaba37eaf 100644
--- a/templates/zerver/help/bots-and-integrations.md
+++ b/templates/zerver/help/bots-and-integrations.md
@@ -67,7 +67,7 @@ A few more details:
   Slack-compatible format.
 
     This is the preferred bot type for interactive bots built on top of Zulip
-    botserver.
+    Botserver.
 
 ## Adding bots
 
diff --git a/tools/linter_lib/custom_check.py b/tools/linter_lib/custom_check.py
index cf076d8110..8d6e492696 100644
--- a/tools/linter_lib/custom_check.py
+++ b/tools/linter_lib/custom_check.py
@@ -37,7 +37,7 @@ FILES_WITH_LEGACY_SUBJECT = {
 
 shebang_rules: List["Rule"] = [
     {
-        "pattern": "^#!",
+        "pattern": r"\A#!",
         "description": "zerver library code shouldn't have a shebang line.",
         "include_only": {"zerver/"},
     },
@@ -45,32 +45,35 @@ shebang_rules: List["Rule"] = [
     # that NixOS provides at a fixed path (outside a
     # buildFHSUserEnv sandbox).
     {
-        "pattern": "^#!(?! *(?:/usr/bin/env|/bin/sh)(?: |$))",
+        "pattern": r"\A#!(?! *(?:/usr/bin/env|/bin/sh)(?: |$))",
         "description": "Use `#!/usr/bin/env foo` instead of `#!/path/foo`"
         " for interpreters other than sh.",
     },
     {
-        "pattern": "^#!/usr/bin/env python$",
+        "pattern": r"\A#!/usr/bin/env python$",
         "description": "Use `#!/usr/bin/env python3` instead of `#!/usr/bin/env python`.",
     },
 ]
 
-trailing_whitespace_rule: "Rule" = {
-    "pattern": r"\s+$",
-    "strip": "\n",
-    "exclude": {"tools/ci/success-http-headers.template.txt"},
-    "description": "Fix trailing whitespace",
-}
+base_whitespace_rules: List["Rule"] = [
+    {
+        "pattern": r"[\t ]+$",
+        "exclude": {"tools/ci/success-http-headers.template.txt"},
+        "description": "Fix trailing whitespace",
+    },
+    {
+        "pattern": r"[^\n]\Z",
+        "description": "Missing newline at end of file",
+    },
+]
 whitespace_rules: List["Rule"] = [
-    # This linter should be first since bash_rules depends on it.
-    trailing_whitespace_rule,
+    *base_whitespace_rules,
     {
         "pattern": "http://zulip.readthedocs.io",
         "description": "Use HTTPS when linking to ReadTheDocs",
     },
     {
         "pattern": "\t",
-        "strip": "\n",
         "description": "Fix tab-based whitespace",
     },
 ]
@@ -84,18 +87,16 @@ comma_whitespace_rule: List["Rule"] = [
     },
 ]
 markdown_whitespace_rules: List["Rule"] = [
-    *(rule for rule in whitespace_rules if rule["pattern"] != r"\s+$"),
+    *(rule for rule in whitespace_rules if rule["pattern"] != r"[\t ]+$"),
     # Two spaces trailing a line with other content is okay--it's a Markdown line break.
     # This rule finds one space trailing a non-space, three or more trailing spaces, and
     # spaces on an empty line.
     {
-        "pattern": r"((?<!\s)\s$)|(\s\s\s+$)|(^\s+$)",
-        "strip": "\n",
+        "pattern": r"((?<![\t ])[\t ]$)|([\t ][\t ][\t ]+$)|(^[\t ]+$)",
         "description": "Fix trailing whitespace",
     },
     {
         "pattern": "^#+[A-Za-z0-9]",
-        "strip": "\n",
         "description": "Missing space after # in heading",
         "exclude_line": {
             ("docs/subsystems/hotspots.md", "#hotspot_new_hotspot_name_icon {"),
@@ -247,13 +248,13 @@ python_rules = RuleList(
             "description": 'Avoid using "msgid" as a variable name; use "message_id" instead.',
         },
         {
-            "pattern": "^(?!#)@login_required",
+            "pattern": r"^[\t ]*(?!#)@login_required",
             "description": "@login_required is unsupported; use @zulip_login_required",
             "good_lines": ["@zulip_login_required", "# foo @login_required"],
             "bad_lines": ["@login_required", " @login_required"],
         },
         {
-            "pattern": "^user_profile[.]save[(][)]",
+            "pattern": r"^[\t ]*user_profile[.]save[(][)]",
             "description": "Always pass update_fields when saving user_profile objects",
             "exclude_line": {
                 (
@@ -278,7 +279,7 @@ python_rules = RuleList(
             "bad_lines": ["assertEquals(1, 2)"],
         },
         {
-            "pattern": "assertEqual[(]len[(][^ ]*[)],",
+            "pattern": r"assertEqual[(]len[(][^\n ]*[)],",
             "description": "Use the assert_length helper instead of assertEqual(len(..), ..).",
             "good_lines": ["assert_length(data, 2)"],
             "bad_lines": ["assertEqual(len(data), 2)"],
@@ -288,7 +289,7 @@ python_rules = RuleList(
             },
         },
         {
-            "pattern": "assertTrue[(]len[(][^ ]*[)]",
+            "pattern": r"assertTrue[(]len[(][^\n ]*[)]",
             "description": "Use assert_length or assertGreater helper instead of assertTrue(len(..) ..).",
             "good_lines": ["assert_length(data, 2)", "assertGreater(len(data), 2)"],
             "bad_lines": [
@@ -298,7 +299,7 @@ python_rules = RuleList(
             ],
         },
         {
-            "pattern": r"#\s*type:\s*ignore(?!\[[^][]+\] +# +\S)",
+            "pattern": r"#[\t ]*type:[\t ]*ignore(?!\[[^]\n[]+\] +# +\S)",
             "exclude": {"tools/tests", "zerver/lib/test_runner.py", "zerver/tests"},
             "description": '"type: ignore" should always end with "# type: ignore[code] # explanation for why"',
             "good_lines": ["foo = bar  # type: ignore[code] # explanation"],
@@ -410,11 +411,11 @@ python_rules = RuleList(
             "bad_lines": ["if my_django_model.pk == 42"],
         },
         {
-            "pattern": r"^\s*#\s*type:",
+            "pattern": r"^[\t ]*#[\t ]*type:",
             "description": "Comment-style function type annotation. Use Python3 style annotations instead.",
         },
         {
-            "pattern": r"\S\s*#\s*type:(?!\s*ignore)",
+            "pattern": r"\S[\t ]*#[\t ]*type:(?![\t ]*ignore)",
             "exclude": {
                 "scripts/lib/hash_reqs.py",
                 "scripts/lib/setup_venv.py",
@@ -426,7 +427,7 @@ python_rules = RuleList(
             "bad_lines": ["a = []  # type: List[int]"],
         },
         {
-            "pattern": r": *(?!Optional)[^ ].*= models[.].*null=True",
+            "pattern": r": *(?!Optional)[^\n ].*= models[.].*null=True",
             "include_only": {"zerver/models.py"},
             "description": "Model variable with null=true not annotated as Optional.",
             "good_lines": [
@@ -463,7 +464,7 @@ python_rules = RuleList(
             "exclude": {"zerver/management/commands/process_queue.py"},
         },
         {
-            "pattern": ".is_realm_admin =",
+            "pattern": r"\.is_realm_admin =",
             "description": "Use do_change_user_role function rather than setting UserProfile's is_realm_admin attribute directly.",
             "exclude": {
                 "zerver/migrations/0248_userprofile_role_start.py",
@@ -471,7 +472,7 @@ python_rules = RuleList(
             },
         },
         {
-            "pattern": ".is_guest =",
+            "pattern": r"\.is_guest =",
             "description": "Use do_change_user_role function rather than setting UserProfile's is_guest attribute directly.",
             "exclude": {
                 "zerver/migrations/0248_userprofile_role_start.py",
@@ -487,9 +488,8 @@ python_rules = RuleList(
             "description": "Use @transaction.atomic as function decorator for consistency.",
         },
         *whitespace_rules,
+        *shebang_rules,
     ],
-    max_length=110,
-    shebang_rules=shebang_rules,
 )
 
 bash_rules = RuleList(
@@ -508,9 +508,9 @@ bash_rules = RuleList(
                 "scripts/lib/install",
             },
         },
-        *whitespace_rules[0:1],
+        *base_whitespace_rules,
+        *shebang_rules,
     ],
-    shebang_rules=shebang_rules,
 )
 
 css_rules = RuleList(
@@ -522,12 +522,12 @@ css_rules = RuleList(
 
 prose_style_rules: List["Rule"] = [
     {
-        "pattern": r'^[^{].*?[^\/\#\-"]([jJ]avascript)',  # exclude usage in hrefs/divs/custom-markdown
+        "pattern": r'^[\t ]*[^\n{].*?[^\n\/\#\-"]([jJ]avascript)',  # exclude usage in hrefs/divs/custom-markdown
         "exclude": {"docs/documentation/api.md", "templates/corporate/policies/privacy.md"},
         "description": "javascript should be spelled JavaScript",
     },
     {
-        "pattern": r"""[^\/\-\."'\_\=\>]([gG]ithub)[^\.\-\_"\<]""",  # exclude usage in hrefs/divs
+        "pattern": r"""[^\n\/\-\."'\_\=\>]([gG]ithub)[^\n\.\-\_"\<]""",  # exclude usage in hrefs/divs
         "description": "github should be spelled GitHub",
     },
     {
@@ -820,10 +820,9 @@ json_rules = RuleList(
         # version of the tab-based whitespace rule (we can't just use
         # exclude in whitespace_rules, since we only want to ignore
         # JSON files with tab-based whitespace, not webhook code).
-        trailing_whitespace_rule,
+        *base_whitespace_rules,
         {
             "pattern": "\t",
-            "strip": "\n",
             "exclude": {"zerver/webhooks/"},
             "description": "Fix tab-based whitespace",
         },
@@ -835,27 +834,6 @@ json_rules = RuleList(
     ],
 )
 
-markdown_docs_length_exclude = {
-    # Has some example Vagrant output that's very long
-    "docs/development/setup-vagrant.md",
-    # Have wide output in code blocks
-    "docs/subsystems/logging.md",
-    "docs/subsystems/schema-migrations.md",
-    # Have curl commands with JSON that would be messy to wrap
-    "zerver/webhooks/helloworld/doc.md",
-    "zerver/webhooks/trello/doc.md",
-    # Has a very long configuration line
-    "templates/zerver/integrations/perforce.md",
-    # Has some example code that could perhaps be wrapped
-    "templates/zerver/api/incoming-webhooks-walkthrough.md",
-    "templates/zerver/api/get-messages.md",
-    # This macro has a long indented URL
-    "templates/zerver/help/include/git-webhook-url-with-branches-indented.md",
-    # These two are the same file and have some too-long lines for GitHub badges
-    "README.md",
-    "docs/overview/readme.md",
-}
-
 markdown_rules = RuleList(
     langs=["md"],
     rules=[
@@ -899,8 +877,6 @@ markdown_rules = RuleList(
             "description": "Don't link directly to line numbers",
         },
     ],
-    max_length=120,
-    length_exclude=markdown_docs_length_exclude,
     exclude_files_in="templates/zerver/help/",
 )
 
@@ -926,14 +902,14 @@ help_markdown_rules = RuleList(
             "exclude_pattern": "(-realm-|[kK]eycloak)",
         },
     ],
-    length_exclude=markdown_docs_length_exclude,
 )
 
 puppet_rules = RuleList(
     langs=["pp"],
     rules=[
+        *whitespace_rules,
         {
-            "pattern": r"(include\s+|\$)zulip::(profile|base)\b",
+            "pattern": r"(include[\t ]+|\$)zulip::(profile|base)\b",
             "exclude": {
                 "puppet/zulip/manifests/profile/",
                 "puppet/zulip_ops/manifests/",
@@ -942,7 +918,7 @@ puppet_rules = RuleList(
             "description": "Abstraction layering violation; only profiles should reference profiles or zulip::base",
         },
         {
-            "pattern": r"(include\s+|\$)zulip_ops::(profile|base)\b",
+            "pattern": r"(include[\t ]+|\$)zulip_ops::(profile|base)\b",
             "exclude": {
                 "puppet/zulip/manifests/",
                 "puppet/zulip_ops/manifests/profile/",
diff --git a/version.py b/version.py
index d554b618be..228ee76dc0 100644
--- a/version.py
+++ b/version.py
@@ -48,4 +48,4 @@ API_FEATURE_LEVEL = 132
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = "188.1"
+PROVISION_VERSION = "189.0"