diff --git a/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__eslintrc_env__eslintrc_no_env.json fixtures__eslintrc_env__test.js@oxlint.snap b/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__eslintrc_env__eslintrc_no_env.json fixtures__eslintrc_env__test.js@oxlint.snap
index 7b375b6b0d5b1..0a7fdbf123ba4 100644
--- a/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__eslintrc_env__eslintrc_no_env.json fixtures__eslintrc_env__test.js@oxlint.snap	
+++ b/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__eslintrc_env__eslintrc_no_env.json fixtures__eslintrc_env__test.js@oxlint.snap	
@@ -11,6 +11,7 @@ working directory:
  1 | console.log('')
    : ^^^^^^^
    `----
+  help: Either define 'console' or remove the reference to it. If 'console' is a global variable, add it to the 'globals' configuration.
 
 Found 1 warning and 0 errors.
 Finished in <variable>ms on 1 file with 94 rules using 1 threads.
diff --git a/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__no_undef__eslintrc.json fixtures__no_undef__test.js@oxlint.snap b/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__no_undef__eslintrc.json fixtures__no_undef__test.js@oxlint.snap
index 517eeb37d304a..d971efbf1c268 100644
--- a/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__no_undef__eslintrc.json fixtures__no_undef__test.js@oxlint.snap	
+++ b/apps/oxlint/src/snapshots/_-W no-undef -c fixtures__no_undef__eslintrc.json fixtures__no_undef__test.js@oxlint.snap	
@@ -11,6 +11,7 @@ working directory:
  1 | console.log(foo)
    : ^^^^^^^
    `----
+  help: Either define 'console' or remove the reference to it. If 'console' is a global variable, add it to the 'globals' configuration.
 
 Found 1 warning and 0 errors.
 Finished in <variable>ms on 1 file with 94 rules using 1 threads.
diff --git a/crates/oxc_linter/src/rules/eslint/no_setter_return.rs b/crates/oxc_linter/src/rules/eslint/no_setter_return.rs
index b7dc351c97d75..8006839d4d6be 100644
--- a/crates/oxc_linter/src/rules/eslint/no_setter_return.rs
+++ b/crates/oxc_linter/src/rules/eslint/no_setter_return.rs
@@ -6,7 +6,9 @@ use oxc_span::Span;
 use crate::{AstNode, context::LintContext, rule::Rule};
 
 fn no_setter_return_diagnostic(span: Span) -> OxcDiagnostic {
-    OxcDiagnostic::warn("Setter cannot return a value").with_label(span)
+    OxcDiagnostic::warn("Setter cannot return a value")
+        .with_help("Remove the return statement or ensure it does not return a value.")
+        .with_label(span)
 }
 
 #[derive(Debug, Default, Clone)]
diff --git a/crates/oxc_linter/src/rules/eslint/no_undef.rs b/crates/oxc_linter/src/rules/eslint/no_undef.rs
index 065b88ff7d461..a0f611bb5a75d 100644
--- a/crates/oxc_linter/src/rules/eslint/no_undef.rs
+++ b/crates/oxc_linter/src/rules/eslint/no_undef.rs
@@ -13,7 +13,11 @@ use crate::{
 };
 
 fn no_undef_diagnostic(name: &str, span: Span) -> OxcDiagnostic {
-    OxcDiagnostic::warn(format!("'{name}' is not defined.")).with_label(span)
+    OxcDiagnostic::warn(format!("'{name}' is not defined."))
+        .with_help(format!(
+            "Either define '{name}' or remove the reference to it. If '{name}' is a global variable, add it to the 'globals' configuration."
+        ))
+        .with_label(span)
 }
 
 #[derive(Debug, Default, Clone, JsonSchema, Deserialize)]
diff --git a/crates/oxc_linter/src/rules/eslint/no_unreachable.rs b/crates/oxc_linter/src/rules/eslint/no_unreachable.rs
index ff87565cef6e6..036d9fc937998 100644
--- a/crates/oxc_linter/src/rules/eslint/no_unreachable.rs
+++ b/crates/oxc_linter/src/rules/eslint/no_unreachable.rs
@@ -14,7 +14,9 @@ use oxc_span::{GetSpan, Span};
 use crate::{context::LintContext, rule::Rule};
 
 fn no_unreachable_diagnostic(span: Span) -> OxcDiagnostic {
-    OxcDiagnostic::warn("Unreachable code.").with_label(span)
+    OxcDiagnostic::warn("Unreachable code.")
+        .with_help("Remove the unreachable code or fix the control flow to make it reachable.")
+        .with_label(span)
 }
 
 /// <https://github.com/eslint/eslint/blob/069aa680c78b8516b9a1b568519f1d01e74fb2a2/lib/rules/no-unreachable.js#L196>
diff --git a/crates/oxc_linter/src/snapshots/eslint_no_setter_return.snap b/crates/oxc_linter/src/snapshots/eslint_no_setter_return.snap
index 074e874b1b3dc..3e99877622994 100644
--- a/crates/oxc_linter/src/snapshots/eslint_no_setter_return.snap
+++ b/crates/oxc_linter/src/snapshots/eslint_no_setter_return.snap
@@ -7,249 +7,291 @@ source: crates/oxc_linter/src/tester.rs
  1 │ ({ set a(val){ return val + 1; } })
    ·                ───────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:17]
  1 │ ({ set a(val) { return 1; } })
    ·                 ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:24]
  1 │ class A { set a(val) { return 1; } }
    ·                        ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:31]
  1 │ class A { static set a(val) { return 1; } }
    ·                               ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:23]
  1 │ (class { set a(val) { return 1; } })
    ·                       ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:17]
  1 │ ({ set a(val) { return val; } })
    ·                 ───────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:24]
  1 │ class A { set a(val) { return undefined; } }
    ·                        ─────────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:23]
  1 │ (class { set a(val) { return null; } })
    ·                       ────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:17]
  1 │ ({ set a(val) { return x + y; } })
    ·                 ─────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:24]
  1 │ class A { set a(val) { return foo(); } }
    ·                        ─────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:23]
  1 │ (class { set a(val) { return this._a; } })
    ·                       ───────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:17]
  1 │ ({ set a(val) { return this.a; } })
    ·                 ──────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:28]
  1 │ ({ set a(val) { if (foo) { return 1; }; } })
    ·                            ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:30]
  1 │ class A { set a(val) { try { return 1; } catch(e) {} } }
    ·                              ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:57]
  1 │ (class { set a(val) { while (foo){ if (bar) break; else return 1; } } })
    ·                                                         ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:17]
  1 │ ({ set a(val) { return 1; }, set b(val) { return 1; } })
    ·                 ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:43]
  1 │ ({ set a(val) { return 1; }, set b(val) { return 1; } })
    ·                                           ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:24]
  1 │ class A { set a(val) { return 1; } set b(val) { return 1; } }
    ·                        ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:49]
  1 │ class A { set a(val) { return 1; } set b(val) { return 1; } }
    ·                                                 ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:23]
  1 │ (class { set a(val) { return 1; } static set b(val) { return 1; } })
    ·                       ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:55]
  1 │ (class { set a(val) { return 1; } static set b(val) { return 1; } })
    ·                                                       ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:27]
  1 │ ({ set a(val) { if(val) { return 1; } else { return 2 }; } })
    ·                           ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:46]
  1 │ ({ set a(val) { if(val) { return 1; } else { return 2 }; } })
    ·                                              ────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:46]
  1 │ class A { set a(val) { switch(val) { case 1: return x; case 2: return y; default: return z } } }
    ·                                              ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:64]
  1 │ class A { set a(val) { switch(val) { case 1: return x; case 2: return y; default: return z } } }
    ·                                                                ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:83]
  1 │ class A { set a(val) { switch(val) { case 1: return x; case 2: return y; default: return z } } }
    ·                                                                                   ────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:62]
  1 │ (class { static set a(val) { if (val > 0) { this._val = val; return val; } return false; } })
    ·                                                              ───────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:76]
  1 │ (class { static set a(val) { if (val > 0) { this._val = val; return val; } return false; } })
    ·                                                                            ─────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:27]
  1 │ ({ set a(val) { if(val) { return 1; } else { return; }; } })
    ·                           ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:46]
  1 │ class A { set a(val) { switch(val) { case 1: return x; case 2: return; default: return z } } }
    ·                                              ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:81]
  1 │ class A { set a(val) { switch(val) { case 1: return x; case 2: return; default: return z } } }
    ·                                                                                 ────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:72]
  1 │ (class { static set a(val) { if (val > 0) { this._val = val; return; } return false; } })
    ·                                                                        ─────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:32]
  1 │ ({ set a(val) { function b(){} return b(); } })
    ·                                ───────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:24]
  1 │ class A { set a(val) { return () => {}; } }
    ·                        ────────────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:49]
  1 │ (class { set a(val) { function b(){ return 1; } return 2; } })
    ·                                                 ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:41]
  1 │ ({ set a(val) { function b(){ return; } return 1; } })
    ·                                         ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:58]
  1 │ class A { set a(val) { var x = function() { return 1; }; return 2; } }
    ·                                                          ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:50]
  1 │ (class { set a(val) { var x = () => { return; }; return 2; } })
    ·                                                  ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:33]
  1 │ function f(){}; ({ set a(val) { return 1; } });
    ·                                 ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:44]
  1 │ x = function f(){}; class A { set a(val) { return 1; } };
    ·                                            ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:40]
  1 │ x = () => {}; A = class { set a(val) { return 1; } };
    ·                                        ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
 
   ⚠ eslint(no-setter-return): Setter cannot return a value
    ╭─[no_setter_return.js:1:25]
  1 │ return; ({ set a(val) { return 1; } }); return 2;
    ·                         ─────────
    ╰────
+  help: Remove the return statement or ensure it does not return a value.
diff --git a/crates/oxc_linter/src/snapshots/eslint_no_undef.snap b/crates/oxc_linter/src/snapshots/eslint_no_undef.snap
index b0ea008ef6286..41581043542fe 100644
--- a/crates/oxc_linter/src/snapshots/eslint_no_undef.snap
+++ b/crates/oxc_linter/src/snapshots/eslint_no_undef.snap
@@ -7,183 +7,214 @@ source: crates/oxc_linter/src/tester.rs
  1 │ a = 1;
    · ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'b' is not defined.
    ╭─[no_undef.tsx:1:9]
  1 │ var a = b;
    ·         ─
    ╰────
+  help: Either define 'b' or remove the reference to it. If 'b' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'b' is not defined.
    ╭─[no_undef.tsx:1:16]
  1 │ function f() { b; }
    ·                ─
    ╰────
+  help: Either define 'b' or remove the reference to it. If 'b' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'window' is not defined.
    ╭─[no_undef.tsx:1:1]
  1 │ window;
    · ──────
    ╰────
+  help: Either define 'window' or remove the reference to it. If 'window' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'require' is not defined.
    ╭─[no_undef.tsx:1:1]
  1 │ require("a");
    · ───────
    ╰────
+  help: Either define 'require' or remove the reference to it. If 'require' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:36]
  1 │ var React; React.render(<img attr={a} />);
    ·                                    ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:41]
  1 │ var React, App; React.render(<App attr={a} />);
    ·                                         ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:2]
  1 │ [a] = [0];
    ·  ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:3]
  1 │ ({a} = {});
    ·   ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:6]
  1 │ ({b: a} = {});
    ·      ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'obj' is not defined.
    ╭─[no_undef.tsx:1:2]
  1 │ [obj.a, obj.b] = [0, 1];
    ·  ───
    ╰────
+  help: Either define 'obj' or remove the reference to it. If 'obj' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'obj' is not defined.
    ╭─[no_undef.tsx:1:9]
  1 │ [obj.a, obj.b] = [0, 1];
    ·         ───
    ╰────
+  help: Either define 'obj' or remove the reference to it. If 'obj' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'b' is not defined.
    ╭─[no_undef.tsx:1:28]
  1 │ const c = 0; const a = {...b, c};
    ·                            ─
    ╰────
+  help: Either define 'b' or remove the reference to it. If 'b' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:20]
  1 │ class C { static { a; } }
    ·                    ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:31]
  1 │ class C { static { { let a; } a; } }
    ·                               ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:40]
  1 │ class C { static { { function a() {} } a; } }
    ·                                        ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:47]
  1 │ class C { static { function foo() { var a; }  a; } }
    ·                                               ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:38]
  1 │ class C { static { var a; } static { a; } }
    ·                                      ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:38]
  1 │ class C { static { let a; } static { a; } }
    ·                                      ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:46]
  1 │ class C { static { function a(){} } static { a; } }
    ·                                              ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:37]
  1 │ class C { static { var a; } foo() { a; } }
    ·                                     ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:37]
  1 │ class C { static { let a; } foo() { a; } }
    ·                                     ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:30]
  1 │ class C { static { var a; } [a]; }
    ·                              ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:30]
  1 │ class C { static { let a; } [a]; }
    ·                              ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:39]
  1 │ class C { static { function a() {} } [a]; }
    ·                                       ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'a' is not defined.
    ╭─[no_undef.tsx:1:31]
  1 │ class C { static { var a; } } a;
    ·                               ─
    ╰────
+  help: Either define 'a' or remove the reference to it. If 'a' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'toString' is not defined.
    ╭─[no_undef.tsx:1:1]
  1 │ toString()
    · ────────
    ╰────
+  help: Either define 'toString' or remove the reference to it. If 'toString' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'hasOwnProperty' is not defined.
    ╭─[no_undef.tsx:1:1]
  1 │ hasOwnProperty()
    · ──────────────
    ╰────
+  help: Either define 'hasOwnProperty' or remove the reference to it. If 'hasOwnProperty' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'r' is not defined.
    ╭─[no_undef.tsx:1:49]
  1 │ export class Foo{ bar: notDefined; }; const t = r + 1;
    ·                                                 ─
    ╰────
+  help: Either define 'r' or remove the reference to it. If 'r' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'arguments' is not defined.
    ╭─[no_undef.tsx:1:21]
  1 │ const arrow = () => arguments;
    ·                     ─────────
    ╰────
+  help: Either define 'arguments' or remove the reference to it. If 'arguments' is a global variable, add it to the 'globals' configuration.
 
   ⚠ eslint(no-undef): 'arguments' is not defined.
    ╭─[no_undef.tsx:1:9]
  1 │ var a = arguments;
    ·         ─────────
    ╰────
+  help: Either define 'arguments' or remove the reference to it. If 'arguments' is a global variable, add it to the 'globals' configuration.
diff --git a/crates/oxc_linter/src/snapshots/eslint_no_unreachable.snap b/crates/oxc_linter/src/snapshots/eslint_no_unreachable.snap
index 8438db271af8d..0683c93d352f1 100644
--- a/crates/oxc_linter/src/snapshots/eslint_no_unreachable.snap
+++ b/crates/oxc_linter/src/snapshots/eslint_no_unreachable.snap
@@ -7,129 +7,151 @@ source: crates/oxc_linter/src/tester.rs
  1 │ function foo() { return x; var x = 1; }
    ·                            ──────────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:28]
  1 │ function foo() { return x; var x, y = 1; }
    ·                            ─────────────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:23]
  1 │ while (true) { break; var x = 1; }
    ·                       ──────────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:26]
  1 │ while (true) { continue; var x = 1; }
    ·                          ──────────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:26]
  1 │ function foo() { return; x = 1; }
    ·                          ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:31]
  1 │ function foo() { throw error; x = 1; }
    ·                               ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:23]
  1 │ while (true) { break; x = 1; }
    ·                       ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:26]
  1 │ while (true) { continue; x = 1; }
    ·                          ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:49]
  1 │ function foo() { switch (foo) { case 1: return; x = 1; } }
    ·                                                 ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:50]
  1 │ function foo() { switch (foo) { case 1: throw e; x = 1; } }
    ·                                                  ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:46]
  1 │ while (true) { switch (foo) { case 1: break; x = 1; } }
    ·                                              ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:49]
  1 │ while (true) { switch (foo) { case 1: continue; x = 1; } }
    ·                                                 ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:27]
  1 │ var x = 1; throw 'uh oh'; var y = 2;
    ·                           ──────────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:66]
  1 │ function foo() { var x = 1; if (x) { return; } else { throw e; } x = 2; }
    ·                                                                  ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:59]
  1 │ function foo() { var x = 1; if (x) return; else throw -1; x = 2; }
    ·                                                           ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:56]
  1 │ function foo() { var x = 1; try { return; } finally {} x = 2; }
    ·                                                        ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:57]
  1 │ function foo() { var x = 1; try { } finally { return; } x = 2; }
    ·                                                         ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:55]
  1 │ function foo() { var x = 1; do { return; } while (x); x = 2; }
    ·                                                       ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:70]
  1 │ function foo() { var x = 1; while (x) { if (x) break; else continue; x = 2; } }
    ·                                                                      ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:59]
  1 │ function foo() { var x = 1; for (;;) { if (x) continue; } x = 2; }
    ·                                                           ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:46]
  1 │ function foo() { var x = 1; while (true) { } x = 2; }
    ·                                              ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.
 
   ⚠ eslint(no-unreachable): Unreachable code.
    ╭─[no_unreachable.tsx:1:50]
  1 │ function foo() { var x = 1; do { } while (true); x = 2; }
    ·                                                  ──────
    ╰────
+  help: Remove the unreachable code or fix the control flow to make it reachable.