diff --git a/Cargo.lock b/Cargo.lock
index c3b09e5b..ee219b2b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1616,6 +1616,7 @@ dependencies = [
  "byteorder",
  "chumsky",
  "fs-err",
+ "glob",
  "hemtt-common",
  "hemtt-preprocessor",
  "hemtt-workspace",
@@ -1626,7 +1627,9 @@ dependencies = [
  "paste",
  "serde",
  "serde_json",
+ "thiserror 2.0.19",
  "toml",
+ "tracing",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 0da2120e..6d549177 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -54,6 +54,7 @@ dirs = "6.0.0"
 fs_extra = "1.3.0"
 fs-err = "3.3.1"
 git2 = "0.21.0"
+glob = "0.3.4"
 indexmap = "2.14.0"
 insta = "1.48.0"
 interprocess = "2.4.2"
diff --git a/bin/Cargo.toml b/bin/Cargo.toml
index 6dfa5af1..137a7394 100644
--- a/bin/Cargo.toml
+++ b/bin/Cargo.toml
@@ -41,7 +41,7 @@ dirs = { workspace = true }
 fs_extra = { workspace = true }
 fs-err = { workspace = true }
 git2 = { workspace = true }
-glob = "0.3.4"
+glob = { workspace = true }
 image = "0.25.10"
 indicatif = "0.18.6"
 interprocess = { workspace = true }
diff --git a/bin/src/error.rs b/bin/src/error.rs
index 72bc9a4b..1203c680 100644
--- a/bin/src/error.rs
+++ b/bin/src/error.rs
@@ -46,6 +46,8 @@ pub enum Error {
     Dialoguer(#[from] dialoguer::Error),
     #[error("Git Error: {0}")]
     Git(#[from] git2::Error),
+    #[error("Config file selection error: {0}")]
+    ConfigFiles(#[from] hemtt_config::files::Error),
     #[error("Glob Error: {0}")]
     GlobError(#[from] glob::GlobError),
     #[error("Glob Pattern Error: {0}")]
diff --git a/bin/src/modules/rapifier.rs b/bin/src/modules/rapifier.rs
index 8978eb43..cddd3901 100644
--- a/bin/src/modules/rapifier.rs
+++ b/bin/src/modules/rapifier.rs
@@ -1,4 +1,4 @@
-use std::{collections::HashMap, path::PathBuf, sync::RwLock};
+use std::{collections::HashMap, sync::RwLock};
 
 use hemtt_config::{
     Config,
@@ -11,7 +11,6 @@ use hemtt_workspace::{
     addons::{Addon, Location},
 };
 use rayon::prelude::{IntoParallelRefIterator, ParallelIterator};
-use vfs::VfsFileType;
 
 use crate::{context::Context, error::Error, progress::progress_bar, report::Report};
 
@@ -53,39 +52,12 @@ impl Module for Rapifier {
     fn pre_build(&self, ctx: &Context) -> Result<Report, Error> {
         ctx.state().set(AddonConfigs::default());
         let mut report = Report::new();
-        let glob_options = glob::MatchOptions {
-            require_literal_separator: true,
-            ..Default::default()
-        };
         let mut entries = Vec::new();
-        ctx.addons()
-            .iter()
-            .map(|addon| {
-                let mut globs = Vec::new();
-                if let Some(config) = addon.config() {
-                    if !config.rapify().enabled() {
-                        debug!("rapify disabled for {}", addon.name());
-                        return Ok(());
-                    }
-                    for file in config.rapify().exclude() {
-                        globs.push(glob::Pattern::new(file)?);
-                    }
-                }
-                for entry in ctx.workspace_path().join(addon.folder())?.walk_dir()? {
-                    if entry.metadata()?.file_type == VfsFileType::File && can_rapify(&entry)? {
-                        if globs
-                            .iter()
-                            .any(|pat| pat.matches_with(entry.as_str(), glob_options))
-                        {
-                            debug!("skipping {}", entry.as_str());
-                            continue;
-                        }
-                        entries.push((addon, entry));
-                    }
-                }
-                Ok(())
-            })
-            .collect::<Result<Vec<_>, Error>>()?;
+        for addon in ctx.addons() {
+            for entry in hemtt_config::files::checkable(ctx.workspace_path(), addon)? {
+                entries.push((addon, entry));
+            }
+        }
 
         let progress = progress_bar(entries.len() as u64).with_message("Rapifying Configs");
         let reports = entries
@@ -196,28 +168,3 @@ pub fn rapify(addon: &Addon, path: &WorkspacePath, ctx: &Context) -> Result<Repo
     }
     Ok(report)
 }
-
-pub fn can_rapify(entry: &WorkspacePath) -> Result<bool, Error> {
-    let path = entry.as_str();
-    let pathbuf = PathBuf::from(&path);
-    let ext = pathbuf
-        .extension()
-        .unwrap_or_else(|| std::ffi::OsStr::new(""))
-        .to_str()
-        .expect("osstr should be valid utf8");
-    if ext == "cpp" && pathbuf.file_name() != Some(std::ffi::OsStr::new("config.cpp")) {
-        warn!(
-            "{} - cpp files other than config.cpp are usually not intentional. use hpp for includes",
-            path.trim_start_matches('/')
-        );
-    }
-    if !["cpp", "rvmat", "ext", "sqm", "bikb", "bisurf"].contains(&ext) {
-        return Ok(false);
-    }
-    let mut buffer = vec![0; 4];
-    if entry.open_file()?.read_exact(&mut buffer).is_err() {
-        // The file is less than 4 bytes, so it is not rapified
-        return Ok(true);
-    }
-    Ok(buffer != b"\0raP")
-}
diff --git a/hls/src/config/lints.rs b/hls/src/config/lints.rs
index 61d54e4b..5d3622df 100644
--- a/hls/src/config/lints.rs
+++ b/hls/src/config/lints.rs
@@ -4,7 +4,7 @@ use std::{
 };
 
 use hemtt_preprocessor::Processor;
-use hemtt_workspace::{WorkspacePath, reporting::WorkspaceFiles};
+use hemtt_workspace::{WorkspacePath, addons::Addon, reporting::WorkspaceFiles};
 use tokio::{sync::RwLock, task::JoinSet};
 use tower_lsp::Client;
 use tracing::{debug, warn};
@@ -38,12 +38,26 @@ impl Cache {
 
 fn check_addons(workspace: &EditorWorkspace, client: Client) {
     let mut futures = JoinSet::new();
-    for config in workspace.root().addons() {
-        let Ok(source) = workspace.root().join(config.as_str()) else {
-            warn!("failed to join config {:?}", config);
-            continue;
+    // Every rapifiable file, not just `config.cpp`, and honouring the addon's
+    // `rapify` settings - the same set the CLI checks
+    let addons = match Addon::scan(workspace.root_disk()) {
+        Ok(addons) => addons,
+        Err(e) => {
+            warn!("not checking configs, failed to scan addons: {e}");
+            return;
+        }
+    };
+    for addon in addons {
+        let files = match hemtt_config::files::checkable(workspace.root(), &addon) {
+            Ok(files) => files,
+            Err(e) => {
+                warn!("not checking `{}`: {e}", addon.folder());
+                continue;
+            }
         };
-        futures.spawn(check_addon(source, workspace.clone()));
+        for source in files {
+            futures.spawn(check_addon(source, workspace.clone()));
+        }
     }
     tokio::spawn(async move {
         futures.join_all().await;
diff --git a/libs/config/Cargo.toml b/libs/config/Cargo.toml
index a20aef0f..b95ea5bf 100644
--- a/libs/config/Cargo.toml
+++ b/libs/config/Cargo.toml
@@ -20,10 +20,13 @@ automod = { workspace = true }
 byteorder = { workspace = true }
 chumsky = { workspace = true }
 fs-err = { workspace = true }
+glob = { workspace = true }
 indexmap = { workspace = true }
 linkme = { workspace = true }
 lsp-types = { workspace = true }
+thiserror = { workspace = true }
 toml = { workspace = true }
+tracing = { workspace = true }
 
 serde = { workspace = true, features = ["derive"], optional = true }
 
diff --git a/libs/config/src/files.rs b/libs/config/src/files.rs
new file mode 100644
index 00000000..0527150e
--- /dev/null
+++ b/libs/config/src/files.rs
@@ -0,0 +1,90 @@
+//! Which files in an addon HEMTT config-checks.
+//!
+//! Shared so the CLI and the language server cannot disagree about it. They
+//! did: the CLI checked every rapifiable file and honoured the addon's
+//! `rapify` settings, while the editor only ever looked at `config.cpp` and
+//! ignored `exclude` and `enabled` entirely.
+
+use std::io::Read;
+
+use hemtt_workspace::{WorkspacePath, addons::Addon};
+
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+    #[error("Workspace error: {0}")]
+    Workspace(#[from] hemtt_workspace::Error),
+    #[error("Invalid rapify exclude pattern: {0}")]
+    Pattern(#[from] glob::PatternError),
+}
+
+/// Extensions that HEMTT rapifies.
+const EXTENSIONS: &[&str] = &["cpp", "rvmat", "ext", "sqm", "bikb", "bisurf"];
+
+/// Can this file be rapified?
+///
+/// A file that is already rapified is skipped - it starts with `\0raP`.
+///
+/// # Errors
+/// [`hemtt_workspace::Error`] if the file cannot be read
+pub fn can_rapify(entry: &WorkspacePath) -> Result<bool, hemtt_workspace::Error> {
+    let path = entry.as_str();
+    let pathbuf = std::path::PathBuf::from(&path);
+    let Some(ext) = pathbuf.extension().and_then(std::ffi::OsStr::to_str) else {
+        return Ok(false);
+    };
+    if ext == "cpp" && pathbuf.file_name() != Some(std::ffi::OsStr::new("config.cpp")) {
+        tracing::warn!(
+            "{} - cpp files other than config.cpp are usually not intentional. use hpp for includes",
+            path.trim_start_matches('/')
+        );
+    }
+    if !EXTENSIONS.contains(&ext) {
+        return Ok(false);
+    }
+    let mut buffer = vec![0; 4];
+    if entry.open_file()?.read_exact(&mut buffer).is_err() {
+        // The file is less than 4 bytes, so it is not rapified
+        return Ok(true);
+    }
+    Ok(buffer != b"\0raP")
+}
+
+/// The files in an addon that should be config-checked.
+///
+/// Honours the addon's `rapify` settings: nothing if it is disabled, and
+/// anything matching an `exclude` pattern is left out.
+///
+/// # Errors
+/// [`Error::Workspace`] if the addon cannot be walked
+/// [`Error::Pattern`] if an `exclude` pattern is not a valid glob
+pub fn checkable(root: &WorkspacePath, addon: &Addon) -> Result<Vec<WorkspacePath>, Error> {
+    let mut excludes = Vec::new();
+    if let Some(config) = addon.config() {
+        if !config.rapify().enabled() {
+            tracing::debug!("rapify disabled for {}", addon.name());
+            return Ok(Vec::new());
+        }
+        for pattern in config.rapify().exclude() {
+            excludes.push(glob::Pattern::new(pattern)?);
+        }
+    }
+    let options = glob::MatchOptions {
+        require_literal_separator: true,
+        ..Default::default()
+    };
+    let mut files = Vec::new();
+    for entry in root.join(addon.folder())?.walk_dir()? {
+        if !entry.is_file()? || !can_rapify(&entry)? {
+            continue;
+        }
+        if excludes
+            .iter()
+            .any(|pattern| pattern.matches_with(entry.as_str(), options))
+        {
+            tracing::debug!("skipping {}", entry.as_str());
+            continue;
+        }
+        files.push(entry);
+    }
+    Ok(files)
+}
diff --git a/libs/config/src/lib.rs b/libs/config/src/lib.rs
index da67e899..7c45d3e6 100644
--- a/libs/config/src/lib.rs
+++ b/libs/config/src/lib.rs
@@ -11,6 +11,7 @@ use std::{
 
 pub mod analyze;
 pub mod display;
+pub mod files;
 mod model;
 pub mod parse;
 pub mod rapify;
diff --git a/libs/config/tests/files.rs b/libs/config/tests/files.rs
new file mode 100644
index 00000000..ad962f35
--- /dev/null
+++ b/libs/config/tests/files.rs
@@ -0,0 +1,63 @@
+#![allow(clippy::unwrap_used)]
+
+//! Which files get config checked. Both the CLI and the language server rely
+//! on this answer, so a change here changes what the editor shows.
+
+use hemtt_config::files::{can_rapify, checkable};
+use hemtt_workspace::{LayerType, addons::Addon};
+
+const ROOT: &str = "tests/files";
+
+fn workspace() -> hemtt_workspace::WorkspacePath {
+    hemtt_workspace::Workspace::builder()
+        .physical(&std::path::PathBuf::from(ROOT), LayerType::Source)
+        .finish(None, false, &hemtt_common::config::PDriveOption::Disallow)
+        .unwrap()
+}
+
+fn addon() -> Addon {
+    Addon::new(
+        &std::path::PathBuf::from(ROOT),
+        "main".to_string(),
+        hemtt_workspace::addons::Location::Addons,
+    )
+    .unwrap()
+}
+
+fn names(mut files: Vec<hemtt_workspace::WorkspacePath>) -> Vec<String> {
+    files.sort_by_key(hemtt_workspace::WorkspacePath::filename);
+    files
+        .iter()
+        .map(hemtt_workspace::WorkspacePath::filename)
+        .collect()
+}
+
+#[test]
+fn rapifiable_extensions() {
+    let workspace = workspace();
+    for name in ["config.cpp", "checked.rvmat", "mission.ext"] {
+        let path = workspace.join(format!("/addons/main/{name}")).unwrap();
+        assert!(can_rapify(&path).unwrap(), "{name} should be rapifiable");
+    }
+    let path = workspace.join("/addons/main/notes.txt").unwrap();
+    assert!(!can_rapify(&path).unwrap(), "notes.txt is not a config");
+}
+
+/// The editor used to check only `config.cpp`, so an error in a `.rvmat` or
+/// `.ext` was reported by `hemtt check` and never shown.
+#[test]
+fn checks_every_rapifiable_file() {
+    let files = names(checkable(&workspace(), &addon()).unwrap());
+    assert!(files.contains(&"config.cpp".to_string()), "{files:?}");
+    assert!(files.contains(&"checked.rvmat".to_string()), "{files:?}");
+    assert!(files.contains(&"mission.ext".to_string()), "{files:?}");
+    assert!(!files.contains(&"notes.txt".to_string()), "{files:?}");
+}
+
+/// The editor used to ignore `rapify.exclude`, so it reported diagnostics on
+/// files the project had deliberately excluded.
+#[test]
+fn honours_exclude() {
+    let files = names(checkable(&workspace(), &addon()).unwrap());
+    assert!(!files.contains(&"skipped.rvmat".to_string()), "{files:?}");
+}
diff --git a/libs/config/tests/files/addons/main/$PBOPREFIX$ b/libs/config/tests/files/addons/main/$PBOPREFIX$
new file mode 100644
index 00000000..fd1b0e37
--- /dev/null
+++ b/libs/config/tests/files/addons/main/$PBOPREFIX$
@@ -0,0 +1 @@
+z\test\addons\main
diff --git a/libs/config/tests/files/addons/main/addon.toml b/libs/config/tests/files/addons/main/addon.toml
new file mode 100644
index 00000000..3ef5c0fc
--- /dev/null
+++ b/libs/config/tests/files/addons/main/addon.toml
@@ -0,0 +1,2 @@
+[rapify]
+exclude = ["/addons/main/skipped.rvmat"]
diff --git a/libs/config/tests/files/addons/main/checked.rvmat b/libs/config/tests/files/addons/main/checked.rvmat
new file mode 100644
index 00000000..0d42577c
--- /dev/null
+++ b/libs/config/tests/files/addons/main/checked.rvmat
@@ -0,0 +1 @@
+class Stage0 { texture = "a.paa"; };
diff --git a/libs/config/tests/files/addons/main/config.cpp b/libs/config/tests/files/addons/main/config.cpp
new file mode 100644
index 00000000..4a0a2823
--- /dev/null
+++ b/libs/config/tests/files/addons/main/config.cpp
@@ -0,0 +1,3 @@
+class CfgPatches {
+    class test_main {};
+};
diff --git a/libs/config/tests/files/addons/main/mission.ext b/libs/config/tests/files/addons/main/mission.ext
new file mode 100644
index 00000000..48af4738
--- /dev/null
+++ b/libs/config/tests/files/addons/main/mission.ext
@@ -0,0 +1 @@
+class Params {};
diff --git a/libs/config/tests/files/addons/main/notes.txt b/libs/config/tests/files/addons/main/notes.txt
new file mode 100644
index 00000000..19e1ad3c
--- /dev/null
+++ b/libs/config/tests/files/addons/main/notes.txt
@@ -0,0 +1 @@
+not a config
diff --git a/libs/config/tests/files/addons/main/skipped.rvmat b/libs/config/tests/files/addons/main/skipped.rvmat
new file mode 100644
index 00000000..420d10ab
--- /dev/null
+++ b/libs/config/tests/files/addons/main/skipped.rvmat
@@ -0,0 +1 @@
+class Stage0 { texture = "b.paa"; };