diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3061a7cf1..c212a7ad4 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -54,9 +54,7 @@ jobs:
           fi
           echo "VERSION=$version" >> "$GITHUB_ENV"
           cargo xtask install --root "$RUNNER_TEMP/install"
-          cargo install --path . --locked --features all-languages --root "$RUNNER_TEMP/full"
           "$PYTHON" scripts/release.py pack --version "$version" --target "$TARGET" --install "$RUNNER_TEMP/install" --output dist
-          "$PYTHON" scripts/release.py pack --version "$version" --target "$TARGET" --install "$RUNNER_TEMP/full" --edition full --output dist
       - name: Verify extracted archives without Bun or checkout assets
         run: |
           # The TUI smoke test drives a Unix PTY.
@@ -66,7 +64,6 @@ jobs:
             "$PYTHON" xtask/tests/smoke_install.py "$RUNNER_TEMP/extracted"
           fi
           "$PYTHON" scripts/smoke_cli_archive.py "dist/diffr-cli-$VERSION-$TARGET.tar.gz" "$VERSION"
-          "$PYTHON" scripts/smoke_cli_archive.py "dist/diffr-cli-full-$VERSION-$TARGET.tar.gz" "$VERSION"
       - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
           name: ${{ matrix.target }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3e60b6bb6..6b9815eaf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -136,7 +136,6 @@ jobs:
           bun-version: 1.3.10
       - uses: dtolnay/rust-toolchain@1.99.0
       - run: cargo build --locked
-      - run: cargo test --locked --features all-languages --bin diffr --test cli
       - working-directory: diffr-ts
         run: |
           bun install --frozen-lockfile
diff --git a/Cargo.toml b/Cargo.toml
index 1ef866327..ae1632136 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -92,15 +92,3 @@ assets = [
 	[ "diffr.1", "usr/share/man/man1/", "644" ],
 	[ "CHANGELOG.md", "usr/share/doc/difftastic/", "644" ],
 ]
-
-[features]
-all-languages = ["lang-fortran", "lang-fsharp", "lang-verilog", "lang-ocaml", "lang-julia", "lang-haskell", "lang-vhdl", "lang-apex", "lang-qml"]
-lang-fortran = ["diffr-core/lang-fortran"]
-lang-fsharp = ["diffr-core/lang-fsharp"]
-lang-verilog = ["diffr-core/lang-verilog"]
-lang-ocaml = ["diffr-core/lang-ocaml"]
-lang-julia = ["diffr-core/lang-julia"]
-lang-haskell = ["diffr-core/lang-haskell"]
-lang-vhdl = ["diffr-core/lang-vhdl"]
-lang-apex = ["diffr-core/lang-apex"]
-lang-qml = ["diffr-core/lang-qml"]
diff --git a/crates/diffr-core/Cargo.toml b/crates/diffr-core/Cargo.toml
index 64409d2ff..51f45322a 100644
--- a/crates/diffr-core/Cargo.toml
+++ b/crates/diffr-core/Cargo.toml
@@ -65,28 +65,28 @@ tree-sitter-elixir = "0.3.4"
 tree-sitter-elm = "5.8.0"
 tree-sitter-erlang = "0.20.0"
 tree-sitter-fish = "3.6.0"
-tree-sitter-fortran = { version = "0.6.0", optional = true }
-tree-sitter-fsharp = { version = "0.3.0", optional = true }
+tree-sitter-fortran = "0.6.0"
+tree-sitter-fsharp = "0.3.0"
 tree-sitter-gleam = "1.0.0"
 tree-sitter-go = "0.25.0"
-tree-sitter-haskell = { version = "0.23.1", optional = true }
+tree-sitter-haskell = "0.23.1"
 tree-sitter-hcl = "1.1.0"
 tree-sitter-html = "0.23.2"
 tree-sitter-java-orchard = "0.5.9"
 tree-sitter-javascript = "0.25.0"
 tree-sitter-json = "0.24.8"
-tree-sitter-julia = { version = "0.23.1", optional = true }
+tree-sitter-julia = "0.23.1"
 tree-sitter-lua = "0.5"
 tree-sitter-make = "1.1.1"
 tree-sitter-newick = "1.1.0"
 tree-sitter-nix = "0.3.0"
 tree-sitter-objc = "3.0.2"
-tree-sitter-ocaml = { version = "0.25.0", optional = true }
+tree-sitter-ocaml = "0.25.0"
 tree-sitter-pascal = "0.10.0"
 tree-sitter-php = "0.24.0"
 tree-sitter-proto = "0.4.0"
 tree-sitter-python = "0.25.0"
-tree-sitter-qmljs = { version = "0.3.0", optional = true }
+tree-sitter-qmljs = "0.3.0"
 tree-sitter-r = "1.2.0"
 tree-sitter-racket = "0.24.7"
 tree-sitter-ruby = "0.23.1"
@@ -94,13 +94,13 @@ tree-sitter-rust-orchard = "0.16.6"
 tree-sitter-scala = "0.26.2"
 tree-sitter-scheme = "0.24.7"
 tree-sitter-sequel = "0.3.11"
-tree-sitter-sfapex = { version = "2.4.0", optional = true }
+tree-sitter-sfapex = "2.4.0"
 tree-sitter-solidity = "1.2.13"
 tree-sitter-swift = "0.7.1"
 tree-sitter-toml-ng = "0.7.0"
 tree-sitter-typescript = "0.23.2"
-tree-sitter-verilog = { version = "1.0.3", optional = true }
-tree-sitter-vhdl = { version = "1.4.0", optional = true }
+tree-sitter-verilog = "1.0.3"
+tree-sitter-vhdl = "1.4.0"
 tree-sitter-xml = "0.7.0"
 tree-sitter-yaml = "0.7.0"
 tree-sitter-zig = "1.1.2"
@@ -122,15 +122,5 @@ tempfile = "3.27.0"
 toml = "0.8"
 
 [features]
-all-languages = ["lang-fortran", "lang-fsharp", "lang-verilog", "lang-ocaml", "lang-julia", "lang-haskell", "lang-vhdl", "lang-apex", "lang-qml"]
-lang-fortran = ["dep:tree-sitter-fortran", "diffr-grammars/lang-fortran"]
-lang-fsharp = ["dep:tree-sitter-fsharp", "diffr-grammars/lang-fsharp"]
-lang-verilog = ["dep:tree-sitter-verilog", "diffr-grammars/lang-verilog"]
-lang-ocaml = ["dep:tree-sitter-ocaml", "diffr-grammars/lang-ocaml"]
-lang-julia = ["dep:tree-sitter-julia", "diffr-grammars/lang-julia"]
-lang-haskell = ["dep:tree-sitter-haskell", "diffr-grammars/lang-haskell"]
-lang-vhdl = ["dep:tree-sitter-vhdl", "diffr-grammars/lang-vhdl"]
-lang-apex = ["dep:tree-sitter-sfapex", "diffr-grammars/lang-apex"]
-lang-qml = ["dep:tree-sitter-qmljs", "diffr-grammars/lang-qml"]
 # Constructors and helpers the diffr package's tests build on.
 test-support = []
diff --git a/crates/diffr-core/src/parse/guess_language.rs b/crates/diffr-core/src/parse/guess_language.rs
index ed30c0b0e..76735e2c9 100644
--- a/crates/diffr-core/src/parse/guess_language.rs
+++ b/crates/diffr-core/src/parse/guess_language.rs
@@ -20,7 +20,6 @@ use strum::{EnumIter, IntoEnumIterator};
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, EnumIter)]
 pub enum Language {
     Ada,
-    #[cfg(feature = "lang-apex")]
     Apex,
     Asm,
     Bash,
@@ -39,13 +38,10 @@ pub enum Language {
     EmacsLisp,
     Erlang,
     Fish,
-    #[cfg(feature = "lang-fsharp")]
     FSharp,
-    #[cfg(feature = "lang-fortran")]
     Fortran,
     Gleam,
     Go,
-    #[cfg(feature = "lang-haskell")]
     Haskell,
     Hcl,
     Html,
@@ -54,7 +50,6 @@ pub enum Language {
     JavaScript,
     JavascriptJsx,
     Json,
-    #[cfg(feature = "lang-julia")]
     Julia,
     Kotlin,
     LaTeX,
@@ -63,16 +58,13 @@ pub enum Language {
     Newick,
     Nix,
     ObjC,
-    #[cfg(feature = "lang-ocaml")]
     OCaml,
-    #[cfg(feature = "lang-ocaml")]
     OCamlInterface,
     Pascal,
     Perl,
     Php,
     Proto,
     Python,
-    #[cfg(feature = "lang-qml")]
     Qml,
     R,
     Racket,
@@ -87,9 +79,7 @@ pub enum Language {
     Toml,
     TypeScript,
     TypeScriptTsx,
-    #[cfg(feature = "lang-verilog")]
     Verilog,
-    #[cfg(feature = "lang-vhdl")]
     Vhdl,
     Xml,
     Yaml,
@@ -131,7 +121,6 @@ pub fn language_override_from_name(name: &str) -> Option<LanguageOverride> {
 pub fn language_name(language: Language) -> &'static str {
     match language {
         Ada => "Ada",
-        #[cfg(feature = "lang-apex")]
         Apex => "Apex",
         Asm => "Assembly",
         Bash => "Bash",
@@ -150,13 +139,10 @@ pub fn language_name(language: Language) -> &'static str {
         EmacsLisp => "Emacs Lisp",
         Erlang => "Erlang",
         Fish => "Fish",
-        #[cfg(feature = "lang-fsharp")]
         FSharp => "F#",
-        #[cfg(feature = "lang-fortran")]
         Fortran => "Fortran",
         Gleam => "Gleam",
         Go => "Go",
-        #[cfg(feature = "lang-haskell")]
         Haskell => "Haskell",
         Hcl => "HCL",
         Html => "HTML",
@@ -165,7 +151,6 @@ pub fn language_name(language: Language) -> &'static str {
         JavaScript => "JavaScript",
         JavascriptJsx => "JavaScript JSX",
         Json => "JSON",
-        #[cfg(feature = "lang-julia")]
         Julia => "Julia",
         Kotlin => "Kotlin",
         LaTeX => "LaTeX",
@@ -174,16 +159,13 @@ pub fn language_name(language: Language) -> &'static str {
         Newick => "Newick",
         Nix => "Nix",
         ObjC => "Objective-C",
-        #[cfg(feature = "lang-ocaml")]
         OCaml => "OCaml",
-        #[cfg(feature = "lang-ocaml")]
         OCamlInterface => "OCaml Interface",
         Pascal => "Pascal",
         Perl => "Perl",
         Php => "PHP",
         Proto => "Proto",
         Python => "Python",
-        #[cfg(feature = "lang-qml")]
         Qml => "QML",
         R => "R",
         Racket => "Racket",
@@ -198,9 +180,7 @@ pub fn language_name(language: Language) -> &'static str {
         Toml => "TOML",
         TypeScript => "TypeScript",
         TypeScriptTsx => "TypeScript TSX",
-        #[cfg(feature = "lang-verilog")]
         Verilog => "Verilog",
-        #[cfg(feature = "lang-vhdl")]
         Vhdl => "VHDL",
         Xml => "XML",
         Yaml => "YAML",
@@ -265,7 +245,6 @@ pub fn language_globs(language: Language) -> Vec<glob::Pattern> {
             "zshenv",
             "zshrc",
         ],
-        #[cfg(feature = "lang-apex")]
         Apex => &["*.apexc", "*.trigger"],
         C => &["*.c"],
         Clojure => &[
@@ -310,13 +289,10 @@ pub fn language_globs(language: Language) -> Vec<glob::Pattern> {
             "rebar.lock",
         ],
         Fish => &["*.fish"],
-        #[cfg(feature = "lang-fsharp")]
         FSharp => &["*.fs", "*.fsx", "*.fsi"],
-        #[cfg(feature = "lang-fortran")]
         Fortran => &["*.f", "*.for", "*.f90", "*.F", "*.FOR", "*.F90"],
         Gleam => &["*.gleam"],
         Go => &["*.go"],
-        #[cfg(feature = "lang-haskell")]
         Haskell => &["*.hs"],
         Hcl => &["*.hcl", "*.nomad", "*.tf", "*.tfvars", "*.workflow"],
         Html => &["*.html", "*.htm", "*.xhtml"],
@@ -354,7 +330,6 @@ pub fn language_globs(language: Language) -> Vec<glob::Pattern> {
             "flake.lock",
         ],
         JavascriptJsx => &["*.jsx"],
-        #[cfg(feature = "lang-julia")]
         Julia => &["*.jl"],
         Kotlin => &["*.kt", "*.ktm", "*.kts"],
         LaTeX => &["*.aux", "*.cls", "*.sty", "*.tex"],
@@ -383,9 +358,7 @@ pub fn language_globs(language: Language) -> Vec<glob::Pattern> {
         Newick => &["*.nhx", "*.nwk", "*.nh"],
         Nix => &["*.nix"],
         ObjC => &["*.m"],
-        #[cfg(feature = "lang-ocaml")]
         OCaml => &["*.ml"],
-        #[cfg(feature = "lang-ocaml")]
         OCamlInterface => &["*.mli"],
         Pascal => &["*.pas", "*.dfm", "*.dpr", "*.lpr", "*.pascal"],
         Perl => &["*.pm", "*.pl"],
@@ -394,7 +367,6 @@ pub fn language_globs(language: Language) -> Vec<glob::Pattern> {
         ],
         Proto => &["*.proto"],
         Python => &["*.py", "*.py3", "*.pyi", "*.bzl", "TARGETS", "BUCK", "DEPS"],
-        #[cfg(feature = "lang-qml")]
         Qml => &["*.qml"],
         R => &["*.R", "*.r", "*.rd", "*.rsx", ".Rprofile", "expr-dist"],
         Racket => &["*.rkt"],
@@ -424,9 +396,7 @@ pub fn language_globs(language: Language) -> Vec<glob::Pattern> {
         ],
         TypeScript => &["*.ts", "*.cts", "*.mts"],
         TypeScriptTsx => &["*.tsx"],
-        #[cfg(feature = "lang-verilog")]
         Verilog => &["*.v", "*.sv", "*.vh"],
-        #[cfg(feature = "lang-vhdl")]
         Vhdl => &["*.vhdl", "*.vhd"],
         Xml => &[
             "*.ant",
@@ -575,13 +545,10 @@ fn from_emacs_mode_header(src: &str) -> Option<Language> {
             "elm" => Elm,
             "emacs-lisp" => EmacsLisp,
             "fish" => Fish,
-            #[cfg(feature = "lang-fsharp")]
             "fsharp" => FSharp,
-            #[cfg(feature = "lang-fortran")]
             "fortran" => Fortran,
             "gleam" => Gleam,
             "go" => Go,
-            #[cfg(feature = "lang-haskell")]
             "haskell" => Haskell,
             "hcl" => Hcl,
             "html" => Html,
@@ -603,12 +570,9 @@ fn from_emacs_mode_header(src: &str) -> Option<Language> {
             "sql" => Sql,
             "swift" => Swift,
             "toml" => Toml,
-            #[cfg(feature = "lang-ocaml")]
             "tuareg" => OCaml,
             "typescript" => TypeScript,
-            #[cfg(feature = "lang-verilog")]
             "verilog" => Verilog,
-            #[cfg(feature = "lang-vhdl")]
             "vhdl" => Vhdl,
             "yaml" => Yaml,
             "zig" => Zig,
@@ -637,11 +601,9 @@ fn from_shebang(src: &str) -> Option<Language> {
                     "elixir" => return Some(Elixir),
                     "escript" => return Some(Erlang),
                     "fish" => return Some(Fish),
-                    #[cfg(feature = "lang-haskell")]
                     "runghc" | "runhaskell" | "runhugs" => return Some(Haskell),
                     "chakra" | "d8" | "gjs" | "js" | "node" | "nodejs" | "qjs" | "rhino" | "v8"
                     | "v8-shell" => return Some(JavaScript),
-                    #[cfg(feature = "lang-ocaml")]
                     "ocaml" | "ocamlrun" | "ocamlscript" => return Some(OCaml),
                     "perl" => return Some(Perl),
                     "python" | "python2" | "python3" => return Some(Python),
@@ -751,7 +713,6 @@ mod tests {
     }
 
     #[test]
-    #[cfg(feature = "lang-ocaml")]
     fn test_guess_by_emacs_mode_shorthand() {
         let path = Path::new("foo");
         assert_eq!(guess(path, "(* -*- tuareg -*- *)", &[]), Some(OCaml));
diff --git a/crates/diffr-core/src/parse/tree_sitter_parser.rs b/crates/diffr-core/src/parse/tree_sitter_parser.rs
index b78aa4811..fd496547a 100644
--- a/crates/diffr-core/src/parse/tree_sitter_parser.rs
+++ b/crates/diffr-core/src/parse/tree_sitter_parser.rs
@@ -85,7 +85,6 @@ pub struct TreeSitterConfig {
 }
 
 // TODO: begin/end and object/end.
-#[cfg(feature = "lang-ocaml")]
 const OCAML_ATOM_NODES: [&str; 6] = [
     "character",
     "string",
@@ -132,7 +131,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-apex")]
         Apex => {
             let language_fn = diffr_grammars::APEX;
             let language = tree_sitter::Language::new(language_fn);
@@ -451,7 +449,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-fsharp")]
         FSharp => {
             let language_fn = diffr_grammars::FSHARP;
             let language = tree_sitter::Language::new(language_fn);
@@ -467,7 +464,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-fortran")]
         Fortran => {
             let language_fn = diffr_grammars::FORTRAN;
             let language = tree_sitter::Language::new(language_fn);
@@ -512,7 +508,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-haskell")]
         Haskell => {
             let language_fn = diffr_grammars::HASKELL;
             let language = tree_sitter::Language::new(language_fn);
@@ -685,7 +680,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-julia")]
         Julia => {
             let language_fn = diffr_grammars::JULIA;
             let language = tree_sitter::Language::new(language_fn);
@@ -840,7 +834,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-ocaml")]
         OCaml => {
             let language_fn = diffr_grammars::OCAML;
             let language = tree_sitter::Language::new(language_fn);
@@ -854,7 +847,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-ocaml")]
         OCamlInterface => {
             let language_fn = diffr_grammars::OCAML_INTERFACE;
             let language = tree_sitter::Language::new(language_fn);
@@ -960,7 +952,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-qml")]
         Qml => {
             let language_fn = diffr_grammars::QMLJS;
             let language = tree_sitter::Language::new(language_fn);
@@ -1248,7 +1239,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-verilog")]
         Verilog => {
             let language_fn = diffr_grammars::VERILOG;
             let language = tree_sitter::Language::new(language_fn);
@@ -1265,7 +1255,6 @@ fn build_config(language: guess::Language) -> TreeSitterConfig {
                 sub_languages: vec![],
             }
         }
-        #[cfg(feature = "lang-vhdl")]
         Vhdl => {
             let language_fn = diffr_grammars::VHDL;
             let language = tree_sitter::Language::new(language_fn);
diff --git a/crates/diffr-grammars/Cargo.toml b/crates/diffr-grammars/Cargo.toml
index bd2b1e45d..80a9d58f9 100644
--- a/crates/diffr-grammars/Cargo.toml
+++ b/crates/diffr-grammars/Cargo.toml
@@ -28,13 +28,3 @@ tree-sitter = "0.26.10"
 tree-sitter-c = "0.24"
 zstd = { version = "0.13.3", default-features = false }
 
-[features]
-lang-apex = []
-lang-fortran = []
-lang-fsharp = []
-lang-haskell = []
-lang-julia = []
-lang-ocaml = []
-lang-qml = []
-lang-verilog = []
-lang-vhdl = []
diff --git a/crates/diffr-grammars/build.rs b/crates/diffr-grammars/build.rs
index 0eaa4d884..e115c82cb 100644
--- a/crates/diffr-grammars/build.rs
+++ b/crates/diffr-grammars/build.rs
@@ -14,163 +14,100 @@ use std::ops::Range;
 use std::path::{Path, PathBuf};
 use std::process::Command;
 
-// Grammar crates: (constructor symbol, crate name, source folder, required feature).
-const PACKAGES: &[(&str, &str, &str, Option<&str>)] = &[
-    ("tree_sitter_go", "tree-sitter-go", "src", None),
-    (
-        "tree_sitter_javascript",
-        "tree-sitter-javascript",
-        "src",
-        None,
-    ),
-    ("tree_sitter_python", "tree-sitter-python", "src", None),
+// Grammar crates: (constructor symbol, crate name, source folder).
+const PACKAGES: &[(&str, &str, &str)] = &[
+    ("tree_sitter_go", "tree-sitter-go", "src"),
+    ("tree_sitter_javascript", "tree-sitter-javascript", "src"),
+    ("tree_sitter_python", "tree-sitter-python", "src"),
     (
         "tree_sitter_rust_orchard",
         "tree-sitter-rust-orchard",
         "src",
-        None,
     ),
     (
         "tree_sitter_typescript",
         "tree-sitter-typescript",
         "typescript/src",
-        None,
-    ),
-    ("tree_sitter_tsx", "tree-sitter-typescript", "tsx/src", None),
-    ("tree_sitter_ada", "tree-sitter-ada", "src", None),
-    (
-        "tree_sitter_apex",
-        "tree-sitter-sfapex",
-        "apex/src",
-        Some("lang-apex"),
     ),
-    ("tree_sitter_asm", "tree-sitter-asm", "src", None),
-    ("tree_sitter_bash", "tree-sitter-bash", "src", None),
-    ("tree_sitter_c", "tree-sitter-c", "src", None),
-    ("tree_sitter_c_sharp", "tree-sitter-c-sharp", "src", None),
+    ("tree_sitter_tsx", "tree-sitter-typescript", "tsx/src"),
+    ("tree_sitter_ada", "tree-sitter-ada", "src"),
+    ("tree_sitter_apex", "tree-sitter-sfapex", "apex/src"),
+    ("tree_sitter_asm", "tree-sitter-asm", "src"),
+    ("tree_sitter_bash", "tree-sitter-bash", "src"),
+    ("tree_sitter_c", "tree-sitter-c", "src"),
+    ("tree_sitter_c_sharp", "tree-sitter-c-sharp", "src"),
     (
         "tree_sitter_clojure_orchard",
         "tree-sitter-clojure-orchard",
         "src",
-        None,
-    ),
-    ("tree_sitter_cmake", "tree-sitter-cmake", "src", None),
-    (
-        "tree_sitter_commonlisp",
-        "tree-sitter-commonlisp",
-        "src",
-        None,
     ),
+    ("tree_sitter_cmake", "tree-sitter-cmake", "src"),
+    ("tree_sitter_commonlisp", "tree-sitter-commonlisp", "src"),
     (
         "tree_sitter_containerfile",
         "tree-sitter-containerfile",
         "src",
-        None,
     ),
-    ("tree_sitter_cpp", "tree-sitter-cpp", "src", None),
-    ("tree_sitter_css", "tree-sitter-css", "src", None),
+    ("tree_sitter_cpp", "tree-sitter-cpp", "src"),
+    ("tree_sitter_css", "tree-sitter-css", "src"),
     (
         "tree_sitter_dart_orchard",
         "tree-sitter-dart-orchard",
         "src",
-        None,
     ),
-    (
-        "tree_sitter_devicetree",
-        "tree-sitter-devicetree",
-        "src",
-        None,
-    ),
-    ("tree_sitter_elisp", "tree-sitter-elisp", "src", None),
-    ("tree_sitter_elixir", "tree-sitter-elixir", "src", None),
-    ("tree_sitter_elm", "tree-sitter-elm", "src", None),
-    ("tree_sitter_erlang", "tree-sitter-erlang", "src", None),
-    ("tree_sitter_fish", "tree-sitter-fish", "src", None),
-    (
-        "tree_sitter_fortran",
-        "tree-sitter-fortran",
-        "src",
-        Some("lang-fortran"),
-    ),
-    (
-        "tree_sitter_fsharp",
-        "tree-sitter-fsharp",
-        "fsharp/src",
-        Some("lang-fsharp"),
-    ),
-    ("tree_sitter_gleam", "tree-sitter-gleam", "src", None),
-    (
-        "tree_sitter_haskell",
-        "tree-sitter-haskell",
-        "src",
-        Some("lang-haskell"),
-    ),
-    ("tree_sitter_hcl", "tree-sitter-hcl", "src", None),
-    ("tree_sitter_html", "tree-sitter-html", "src", None),
+    ("tree_sitter_devicetree", "tree-sitter-devicetree", "src"),
+    ("tree_sitter_elisp", "tree-sitter-elisp", "src"),
+    ("tree_sitter_elixir", "tree-sitter-elixir", "src"),
+    ("tree_sitter_elm", "tree-sitter-elm", "src"),
+    ("tree_sitter_erlang", "tree-sitter-erlang", "src"),
+    ("tree_sitter_fish", "tree-sitter-fish", "src"),
+    ("tree_sitter_fortran", "tree-sitter-fortran", "src"),
+    ("tree_sitter_fsharp", "tree-sitter-fsharp", "fsharp/src"),
+    ("tree_sitter_gleam", "tree-sitter-gleam", "src"),
+    ("tree_sitter_haskell", "tree-sitter-haskell", "src"),
+    ("tree_sitter_hcl", "tree-sitter-hcl", "src"),
+    ("tree_sitter_html", "tree-sitter-html", "src"),
     (
         "tree_sitter_java_orchard",
         "tree-sitter-java-orchard",
         "src",
-        None,
-    ),
-    ("tree_sitter_json", "tree-sitter-json", "src", None),
-    (
-        "tree_sitter_julia",
-        "tree-sitter-julia",
-        "src",
-        Some("lang-julia"),
     ),
-    ("tree_sitter_lua", "tree-sitter-lua", "src", None),
-    ("tree_sitter_make", "tree-sitter-make", "src", None),
-    ("tree_sitter_newick", "tree-sitter-newick", "src", None),
-    ("tree_sitter_nix", "tree-sitter-nix", "src", None),
-    ("tree_sitter_objc", "tree-sitter-objc", "src", None),
+    ("tree_sitter_json", "tree-sitter-json", "src"),
+    ("tree_sitter_julia", "tree-sitter-julia", "src"),
+    ("tree_sitter_lua", "tree-sitter-lua", "src"),
+    ("tree_sitter_make", "tree-sitter-make", "src"),
+    ("tree_sitter_newick", "tree-sitter-newick", "src"),
+    ("tree_sitter_nix", "tree-sitter-nix", "src"),
+    ("tree_sitter_objc", "tree-sitter-objc", "src"),
     (
         "tree_sitter_ocaml",
         "tree-sitter-ocaml",
         "grammars/ocaml/src",
-        Some("lang-ocaml"),
     ),
     (
         "tree_sitter_ocaml_interface",
         "tree-sitter-ocaml",
         "grammars/interface/src",
-        Some("lang-ocaml"),
-    ),
-    ("tree_sitter_pascal", "tree-sitter-pascal", "src", None),
-    ("tree_sitter_perl", "ts-parser-perl", "src", None),
-    ("tree_sitter_php", "tree-sitter-php", "php/src", None),
-    ("tree_sitter_proto", "tree-sitter-proto", "src", None),
-    (
-        "tree_sitter_qmljs",
-        "tree-sitter-qmljs",
-        "src",
-        Some("lang-qml"),
     ),
-    ("tree_sitter_r", "tree-sitter-r", "src", None),
-    ("tree_sitter_racket", "tree-sitter-racket", "src", None),
-    ("tree_sitter_ruby", "tree-sitter-ruby", "src", None),
-    ("tree_sitter_scala", "tree-sitter-scala", "src", None),
-    ("tree_sitter_scheme", "tree-sitter-scheme", "src", None),
-    ("tree_sitter_solidity", "tree-sitter-solidity", "src", None),
-    ("tree_sitter_sql", "tree-sitter-sequel", "src", None),
-    ("tree_sitter_swift", "tree-sitter-swift", "src", None),
-    ("tree_sitter_toml", "tree-sitter-toml-ng", "src", None),
-    (
-        "tree_sitter_verilog",
-        "tree-sitter-verilog",
-        "src",
-        Some("lang-verilog"),
-    ),
-    (
-        "tree_sitter_vhdl",
-        "tree-sitter-vhdl",
-        "src",
-        Some("lang-vhdl"),
-    ),
-    ("tree_sitter_xml", "tree-sitter-xml", "xml/src", None),
-    ("tree_sitter_yaml", "tree-sitter-yaml", "src", None),
-    ("tree_sitter_zig", "tree-sitter-zig", "src", None),
+    ("tree_sitter_pascal", "tree-sitter-pascal", "src"),
+    ("tree_sitter_perl", "ts-parser-perl", "src"),
+    ("tree_sitter_php", "tree-sitter-php", "php/src"),
+    ("tree_sitter_proto", "tree-sitter-proto", "src"),
+    ("tree_sitter_qmljs", "tree-sitter-qmljs", "src"),
+    ("tree_sitter_r", "tree-sitter-r", "src"),
+    ("tree_sitter_racket", "tree-sitter-racket", "src"),
+    ("tree_sitter_ruby", "tree-sitter-ruby", "src"),
+    ("tree_sitter_scala", "tree-sitter-scala", "src"),
+    ("tree_sitter_scheme", "tree-sitter-scheme", "src"),
+    ("tree_sitter_solidity", "tree-sitter-solidity", "src"),
+    ("tree_sitter_sql", "tree-sitter-sequel", "src"),
+    ("tree_sitter_swift", "tree-sitter-swift", "src"),
+    ("tree_sitter_toml", "tree-sitter-toml-ng", "src"),
+    ("tree_sitter_verilog", "tree-sitter-verilog", "src"),
+    ("tree_sitter_vhdl", "tree-sitter-vhdl", "src"),
+    ("tree_sitter_xml", "tree-sitter-xml", "xml/src"),
+    ("tree_sitter_yaml", "tree-sitter-yaml", "src"),
+    ("tree_sitter_zig", "tree-sitter-zig", "src"),
 ];
 
 // Grammars in vendored_parsers: (constructor symbol, folder).
@@ -185,13 +122,7 @@ fn main() {
     let roots = package_roots();
     let mut sources: Vec<(&str, PathBuf)> = PACKAGES
         .iter()
-        .filter(|(_, _, _, feature)| {
-            feature.is_none_or(|feature| {
-                let name = feature.replace('-', "_").to_uppercase();
-                std::env::var_os(format!("CARGO_FEATURE_{name}")).is_some()
-            })
-        })
-        .map(|&(symbol, package, folder, _)| (symbol, roots[package].join(folder)))
+        .map(|&(symbol, package, folder)| (symbol, roots[package].join(folder)))
         .collect();
     sources.extend(
         VENDORED
diff --git a/diffr-ts/README.md b/diffr-ts/README.md
index bedd0d73e..a100b303b 100644
--- a/diffr-ts/README.md
+++ b/diffr-ts/README.md
@@ -16,10 +16,6 @@ Supports macOS arm64, macOS x64, Linux arm64, Linux x64, and Windows x64 (`diffr
 network access. Downloads warn on network failure unless `--required`; invalid
 hashes or archives always fail.
 
-`--full` fetches the full edition, which adds the parsers lean builds omit (Apex,
-Fortran, F#, Haskell, Julia, OCaml, QML, Verilog, VHDL). It requires full-edition
-pins, which start with the next release.
-
 ## Wire changes
 
 Keep these files in sync:
@@ -34,8 +30,8 @@ Keep these files in sync:
 ## Release
 
 After tagging the matching Rust release and building with `cargo build --locked`,
-run from `diffr-ts`. New pins select the lean and full CLI-only release archives;
-older pins continue to use the combined archives:
+run from `diffr-ts`. New pins select the CLI-only release archive;
+older pins continue to use the combined archive:
 
 ```sh
 bun install --frozen-lockfile
diff --git a/diffr-ts/bin/fetch.mjs b/diffr-ts/bin/fetch.mjs
index 2910e1bd1..541e2fa76 100755
--- a/diffr-ts/bin/fetch.mjs
+++ b/diffr-ts/bin/fetch.mjs
@@ -19,7 +19,6 @@ try {
 async function main() {
   const { values } = parseArgs({ options: {
     into: { type: "string" },
-    full: { type: "boolean", default: false },
     check: { type: "boolean" },
     required: { type: "boolean" },
     pins: { type: "string", default: join(root, "pins.json") },
@@ -31,9 +30,7 @@ async function main() {
   if (pins.version !== version) throw new Error(`pins.json is for ${pins.version}, package is ${version}; run \`npm run pin\``);
   const target = targets[`${process.platform}-${process.arch}`];
   if (!target) throw new Error(`no diffr release for ${process.platform}-${process.arch}`);
-  const pin = values.full ? pins.full : pins;
-  if (!pin) throw new Error(`pins.json has no full edition for ${version}`);
-  const expected = pin.sha256?.[target];
+  const expected = pins.sha256?.[target];
   if (typeof expected !== "string" || !/^[a-f0-9]{64}$/.test(expected)) {
     throw new Error(`pins.json has no valid sha256 for ${target}`);
   }
@@ -45,8 +42,7 @@ async function main() {
   try {
     const stamp = JSON.parse(readFileSync(stampPath, "utf8"));
     const stat = lstatSync(binary);
-    installed = stat.isFile() && (process.platform === "win32" || (stat.mode & 0o111) !== 0) && stamp.version === version && stamp.target === target
-      && Boolean(stamp.full) === values.full;
+    installed = stat.isFile() && (process.platform === "win32" || (stat.mode & 0o111) !== 0) && stamp.version === version && stamp.target === target;
   } catch { /* Missing or damaged installations are fetched again. */ }
   if (installed) {
     console.log(`diffr ${version} (${target}) already at ${binary}`);
@@ -54,8 +50,8 @@ async function main() {
   }
   if (values.check) throw new Error(`${binary} is missing or not diffr ${version} (${target})`);
 
-  const artifact = values.full ? "diffr-cli-full" : pins.artifact ?? "diffr";
-  if (!["diffr", "diffr-cli", "diffr-cli-full"].includes(artifact)) throw new Error(`unknown pinned artifact: ${artifact}`);
+  const artifact = pins.artifact ?? "diffr";
+  if (!["diffr", "diffr-cli"].includes(artifact)) throw new Error(`unknown pinned artifact: ${artifact}`);
   const asset = `${artifact}-${version}-${target}.tar.gz`;
   const url = `https://github.com/devdotfast/diffr/releases/download/${version}/${asset}`;
   let bytes;
@@ -83,7 +79,7 @@ async function main() {
     }
     chmodSync(extracted, 0o755);
     const stamp = join(staging, "stamp.json");
-    writeFileSync(stamp, `${JSON.stringify({ version, target, ...(values.full && { full: true }) }, null, 2)}\n`);
+    writeFileSync(stamp, `${JSON.stringify({ version, target }, null, 2)}\n`);
     renameSync(extracted, binary);
     renameSync(stamp, stampPath);
   } finally {
diff --git a/diffr-ts/pins.json b/diffr-ts/pins.json
index 0066c9b8a..d20659ec8 100644
--- a/diffr-ts/pins.json
+++ b/diffr-ts/pins.json
@@ -7,14 +7,5 @@
     "x86_64-unknown-linux-gnu": "190c506b238d95f15a552b3983cd3351a5eb385f2057b5a08c90d87a2b466075",
     "aarch64-unknown-linux-gnu": "91abbca8f38cb3de355cbc8a47086686c7e0f88961d6e2012fbefcdee1979607",
     "x86_64-pc-windows-msvc": "0e129b2cf5c86af44643861da42656fc266f2e1f94ab501f0a2b34dc6efff1b7"
-  },
-  "full": {
-    "sha256": {
-      "aarch64-apple-darwin": "6675ba404990be3e7b7f8e26b113b7f083e609e88c7eae366e3367a4e32364d5",
-      "x86_64-apple-darwin": "c9188df81078fe6bb3fbae2b44e7c1fff9b37cbe66c7cd9c11091c3d151e4dcf",
-      "x86_64-unknown-linux-gnu": "a56aa73980850ecdfdce201253d37d06a38ef30cdb0507d61bc973e944f4174a",
-      "aarch64-unknown-linux-gnu": "d6788ac5e17e986ce2f2ebc6069dc27bcb127847f38632a7cfecf434820e3f81",
-      "x86_64-pc-windows-msvc": "d10f2fbb55df4a42e3305c531ffd1e615bca494b8161d4817ed946239063b67b"
-    }
   }
 }
diff --git a/diffr-ts/scripts/pin.mjs b/diffr-ts/scripts/pin.mjs
index d68e38ffa..dc7ab20f9 100755
--- a/diffr-ts/scripts/pin.mjs
+++ b/diffr-ts/scripts/pin.mjs
@@ -22,6 +22,6 @@ async function hashes(artifact) {
   }
   return sha256;
 }
-const pins = { version, artifact: "diffr-cli", sha256: await hashes("diffr-cli"), full: { sha256: await hashes("diffr-cli-full") } };
+const pins = { version, artifact: "diffr-cli", sha256: await hashes("diffr-cli") };
 writeFileSync(join(root, "pins.json"), `${JSON.stringify(pins, null, 2)}\n`);
 console.log(`wrote pins.json for ${version}`);
diff --git a/diffr-ts/src/contract.test.ts b/diffr-ts/src/contract.test.ts
index c27b5c76c..29ad4f4c0 100644
--- a/diffr-ts/src/contract.test.ts
+++ b/diffr-ts/src/contract.test.ts
@@ -1,4 +1,4 @@
-import { afterEach, describe, expect, test } from "bun:test";
+import { afterEach, describe, expect, setDefaultTimeout, test } from "bun:test";
 import { mkdtempSync, rmSync, writeFileSync } from "node:fs";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
@@ -10,6 +10,10 @@ import {
 } from "./index.js";
 import { diffrBinary, repositoryRoot } from "./test-binary.js";
 
+// These tests run the debug binary. Its first run compiles the bundled plugins
+// into an empty wasmtime cache, which is slow on CI runners.
+setDefaultTimeout(30_000);
+
 const dirs: string[] = [];
 function tempDir(prefix: string): string {
   const dir = mkdtempSync(join(tmpdir(), prefix));
diff --git a/diffr-ts/src/fetch.test.ts b/diffr-ts/src/fetch.test.ts
index 63eeb8c7a..853237f5b 100644
--- a/diffr-ts/src/fetch.test.ts
+++ b/diffr-ts/src/fetch.test.ts
@@ -164,17 +164,3 @@ test("unknown pinned artifacts fail before downloading", () => {
   expect(f.run().err).toContain("unknown pinned artifact");
   expect(existsSync(join(f.dir, "requested"))).toBe(false);
 });
-
-test("--full downloads the full archive, fails without full pins, and refetches when switching", () => {
-  const f = fixture("diffr", "diffr-cli");
-  expect(f.run(["--full"]).err).toContain("no full edition");
-  expect(existsSync(join(f.dir, "requested"))).toBe(false);
-  const pins = JSON.parse(readFileSync(f.pins, "utf8"));
-  writeFileSync(f.pins, JSON.stringify({ ...pins, full: { sha256: pins.sha256 } }));
-  expect(f.run(["--full"]).code).toBe(0);
-  expect(readFileSync(join(f.dir, "requested"), "utf8")).toBe(
-    `https://github.com/devdotfast/diffr/releases/download/${version}/diffr-cli-full-${version}-${target}.tar.gz`,
-  );
-  expect(f.run(["--full", "--check"]).code).toBe(0);
-  expect(f.run(["--check"]).code).toBe(1);
-});
diff --git a/diffr-ts/src/version.test.ts b/diffr-ts/src/version.test.ts
index 085b87a3d..ea7fb96e7 100644
--- a/diffr-ts/src/version.test.ts
+++ b/diffr-ts/src/version.test.ts
@@ -17,10 +17,8 @@ test("release pins match the package version and cover all supported targets", (
   const pkg = JSON.parse(readFileSync(join(root, "package.json"), "utf8"));
   const pins = JSON.parse(readFileSync(join(root, "pins.json"), "utf8"));
   expect(pins.version).toBe(pkg.version);
-  for (const { sha256 } of pins.full ? [pins, pins.full] : [pins]) {
-    expect(Object.keys(sha256).sort()).toEqual([
-      "aarch64-apple-darwin", "aarch64-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-pc-windows-msvc", "x86_64-unknown-linux-gnu",
-    ]);
-    for (const hash of Object.values(sha256)) expect(hash).toMatch(/^[a-f0-9]{64}$/);
-  }
+  expect(Object.keys(pins.sha256).sort()).toEqual([
+    "aarch64-apple-darwin", "aarch64-unknown-linux-gnu", "x86_64-apple-darwin", "x86_64-pc-windows-msvc", "x86_64-unknown-linux-gnu",
+  ]);
+  for (const hash of Object.values(pins.sha256)) expect(hash).toMatch(/^[a-f0-9]{64}$/);
 });
diff --git a/scripts/release.py b/scripts/release.py
index 94a718862..3d1635848 100644
--- a/scripts/release.py
+++ b/scripts/release.py
@@ -17,12 +17,12 @@ def archive_name(version, target, artifact="diffr"):
     return f"{artifact}-{version}-{target}.tar.gz"
 
 
-def pack(version, target, install, output, edition="lean"):
+def pack(version, target, install, output):
     exe = ".exe" if "windows" in target else ""
     actual = subprocess.check_output([install / "bin" / f"diffr{exe}", "--version"], text=True).strip()
     if actual != f"diffr {version}":
         raise ValueError(f"Release version mismatch: {actual}")
-    for artifact in ("diffr-cli-full",) if edition == "full" else ("diffr", "diffr-cli"):
+    for artifact in ("diffr", "diffr-cli"):
         with tarfile.open(output / archive_name(version, target, artifact), "w:gz") as archive:
             binaries = ("diffr", "diffr-tui") if artifact == "diffr" else ("diffr",)
             for name in binaries:
@@ -34,7 +34,7 @@ def pack(version, target, install, output, edition="lean"):
 def formula(version, output):
     checksums = {}
     for target in TARGETS:
-        for artifact in ("diffr", "diffr-cli", "diffr-cli-full"):
+        for artifact in ("diffr", "diffr-cli"):
             name = archive_name(version, target, artifact)
             checksums[name] = hashlib.sha256((output / name).read_bytes()).hexdigest()
     (output / "SHA256SUMS").write_text("".join(
@@ -93,7 +93,6 @@ def install
     parser.add_argument("--output", type=Path, required=True)
     parser.add_argument("--target", choices=TARGETS)
     parser.add_argument("--install", type=Path)
-    parser.add_argument("--edition", choices=("lean", "full"), default="lean")
     args = parser.parse_args()
     if not re.fullmatch(r"\d+\.\d+\.\d+", args.version):
         parser.error("version must be a stable X.Y.Z release")
@@ -101,6 +100,6 @@ def install
     if args.command == "pack":
         if not args.target or not args.install:
             parser.error("pack requires --target and --install")
-        pack(args.version, args.target, args.install.resolve(), args.output, args.edition)
+        pack(args.version, args.target, args.install.resolve(), args.output)
     else:
         formula(args.version, args.output)
diff --git a/tests/cli.rs b/tests/cli.rs
index 4cca45459..038065523 100644
--- a/tests/cli.rs
+++ b/tests/cli.rs
@@ -25,72 +25,6 @@ fn list_languages() {
     cmd.assert().stdout(predicate_fn);
 }
 
-#[test]
-fn optional_languages_follow_build_features() {
-    let listed = debug_command()
-        .arg("--list-languages")
-        .assert()
-        .success()
-        .get_output()
-        .stdout
-        .clone();
-    let listed = String::from_utf8(listed).unwrap();
-    let dir = tempfile::tempdir().unwrap();
-    let config = dir.path().join("diffr/config.toml");
-    std::fs::create_dir_all(config.parent().unwrap()).unwrap();
-    std::fs::write(&config, "[plugins]\norder = []\n").unwrap();
-
-    for (name, fixture, extension, enabled) in [
-        ("Apex", "apex", "trigger", cfg!(feature = "lang-apex")),
-        ("Haskell", "haskell", "hs", cfg!(feature = "lang-haskell")),
-        ("Julia", "julia", "jl", cfg!(feature = "lang-julia")),
-        ("OCaml", "ocaml", "ml", cfg!(feature = "lang-ocaml")),
-        (
-            "OCaml Interface",
-            "ocaml_interface",
-            "mli",
-            cfg!(feature = "lang-ocaml"),
-        ),
-        ("QML", "qml", "qml", cfg!(feature = "lang-qml")),
-        ("VHDL", "vhdl", "vhd", cfg!(feature = "lang-vhdl")),
-        ("Fortran", "fortran", "f90", cfg!(feature = "lang-fortran")),
-        ("Verilog", "verilog", "sv", cfg!(feature = "lang-verilog")),
-        ("F#", "f_sharp", "fs", cfg!(feature = "lang-fsharp")),
-    ] {
-        assert_eq!(listed.contains(name), enabled, "{name}");
-        let output = get_base_command()
-            .args([
-                "--format",
-                "ndjson",
-                "--no-index",
-                &format!("sample_files/{fixture}_1.{extension}"),
-                &format!("sample_files/{fixture}_2.{extension}"),
-            ])
-            .env("XDG_CONFIG_HOME", dir.path())
-            .assert()
-            .success()
-            .get_output()
-            .stdout
-            .clone();
-        let events: Vec<serde_json::Value> = std::str::from_utf8(&output)
-            .unwrap()
-            .lines()
-            .map(|line| serde_json::from_str(line).unwrap())
-            .collect();
-        let file = events.iter().find(|event| event["type"] == "file").unwrap();
-        assert_eq!(file["diff"]["type"], "text", "{name}: {file}");
-        assert_eq!(
-            file["diff"]["stats"]["fallback"]["code"].as_str(),
-            if enabled {
-                None
-            } else {
-                Some("unsupported_language")
-            },
-            "{name}",
-        );
-    }
-}
-
 #[test]
 fn dump_tree_sitter() {
     let mut cmd = debug_command();