Merge branch 'fix/gitattributes-stray-cr'

The previous commit wrote a literal carriage-return byte into a comment, where
the text was meant to show the two characters backslash-r. Git's content sniffing
treats a lone CR as a sign of binary data, so .gitattributes itself was classed
-text (git ls-files --eol reported i/-text): the one file in the template that
the new LF policy could not normalise, and one every repo created from it would
have inherited.

The rules themselves were never affected - the byte sat inside a comment.

The comment now says "a trailing CR byte" in words. .gitattributes reports
i/lf w/lf, and `git add --renormalize .` stages nothing else.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LU1NRL7fAaZTtFMTTPn2b1

.gitattributes

@@ -0,0 +1,20 @@
+# Line endings: LF in the repository and in every working tree, on every OS.
+#
+# This file is the policy, not each machine's git config. Git for Windows installs
+# with core.autocrlf=true, which checks text out as CRLF; an attribute here beats
+# that setting, so a fresh clone gets LF regardless of how its machine is set up.
+#
+# It matters beyond tidiness. tools/branding-sites.tsv is read line by line with
+# `read`, and under CRLF every row's last field gained a trailing CR byte - so the
+# branding checker reported all 29 sites as missing on Windows while passing on the
+# Linux CI runner. text=auto leaves genuinely binary files alone.
+* text=auto eol=lf
+
+# Shell scripts are pinned explicitly as well: a strict POSIX sh (dash, CI
+# containers) rejects a CRLF shebang outright rather than misbehaving quietly.
+*.sh text eol=lf
+
+# The exception. cmd.exe misparses LF-only batch files around labels and long
+# lines, so these alone are checked out CRLF. The repository copy is still LF.
+*.bat text eol=crlf
+*.cmd text eol=crlf

.github/workflows/ci.yaml

@@ -0,0 +1,77 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'src/**'
+      - 'xtask/**'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'bundler.toml'
+      - 'tools/**'
+      # This workflow validates itself: a broken step, a moved script path or a
+      # wrong runner label then fails loudly on the commit that caused it, rather
+      # than surfacing later against an unrelated source change. Note the limit -
+      # it checks the job body, not the trigger block above. Break `on:` and the
+      # symptom is silence, which looks like success.
+      - '.github/workflows/**'
+  # Mirrors the push filter. Without it a PR touching only the README would run a
+  # full build - the branch filter alone constrains where, not what.
+  pull_request:
+    branches: [ master ]
+    paths:
+      - 'src/**'
+      - 'xtask/**'
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'bundler.toml'
+      - 'tools/**'
+      - '.github/workflows/**'
+  workflow_dispatch:
+
+# Target the self-hosted Rust/audio runner registered to the `musiikki` org.
+#
+# The runner is host-mode, so the rustup toolchain installed for the
+# `gitea-runner` user is used directly — nothing installs per run, and the cargo
+# registry cache stays warm between jobs.
+#
+# NOTE: `rust-audio` is an ORG-SCOPED label. A plugin cloned from this template
+# into a different org will not see that runner, and its jobs will queue
+# indefinitely rather than fail. Either register a runner advertising this label
+# for that org, or change `runs-on` below.
+
+jobs:
+  build:
+    name: Build
+    runs-on: rust-audio
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Toolchain
+        run: |
+          cargo --version
+          rustc --version
+          echo "CARGO_HOME=${CARGO_HOME:?not set on this runner}"
+
+      # Cheap and needs no toolchain, so it runs first: a rename that only
+      # landed in half the files is worth catching before spending a build on it.
+      - name: Branding consistency
+        run: sh tools/check-branding.sh
+
+      # The default build is CLAP-only; the vst3 feature is opt-in, so both
+      # configurations have to be built to know the cfg gates are still correct.
+      - name: Build (default, CLAP only)
+        run: cargo build --release
+
+      - name: Build (--features vst3)
+        run: cargo build --release --features vst3
+
+      - name: Test
+        run: cargo test --release --features vst3
+
+      # Proves the xtask bundler still works, which a plain `cargo build` does
+      # not exercise — the bundle step is where bundler.toml and the crate name
+      # have to agree.
+      - name: Bundle
+        run: cargo xtask bundle plugin_name --release --features vst3

Cargo.toml

@@ -1,23 +1,41 @@
 [package]
-name = "nih_plug_template"
+name = "plugin_name"
 version = "0.1.0"
 edition = "2021"
 authors = ["Your Name <your@email.com>"]
-homepage = "https://github.com/YOUR-USERNAME/YOUR-PLUGIN-NAME"
+homepage = "https://wiki.novoyuuparosk.org"
 description = "A minimal NIH-plug audio plugin"
-license = "Apache-2.0"
+license = "GPL-3.0-or-later"
 
 [workspace]
 members = ["xtask"]
 
+[features]
+# CLAP only by default. This crate is GPL-3.0-or-later, so enabling VST3 no
+# longer raises a licensing question — the gate now just keeps the default build
+# light, since `vst3-sys` and its macro machinery are a sizeable dependency a
+# CLAP-only plugin never needs. Flip `default` to ["vst3"] if you always want it:
+#   cargo xtask bundle plugin_name --release --features vst3
+default = []
+vst3 = ["nih_plug/vst3"]
+
 [lib]
 # `cdylib` is the plugin binary; `lib` (rlib) lets `cargo test` link the unit tests.
 crate-type = ["cdylib", "lib"]
 
+# Future-incompatibility warnings are deferred hard errors: rustc is telling you
+# this code stops compiling on some later release. Denying the group turns that
+# into a build failure the day it appears, rather than accumulating unnoticed
+# until a toolchain bump breaks the build on a day you did not choose. Style and
+# clippy lints are deliberately untouched - they stay warnings.
+[lints.rust]
+future_incompatible = { level = "deny", priority = -1 }
+
 [dependencies]
 # Pinned to the same commit as musiikki/codename-206.
 # Update the `rev` when you want to update NIH-plug.
-nih_plug = { git = "https://github.com/robbert-vdh/nih-plug.git", rev = "f36931f7af4646065488a9845d8f8c2f95252c23", features = ["assert_process_allocs"] }
+# `default-features = false` drops nih_plug's default `vst3` feature; see [features] above.
+nih_plug = { git = "https://github.com/robbert-vdh/nih-plug.git", rev = "f36931f7af4646065488a9845d8f8c2f95252c23", default-features = false, features = ["assert_process_allocs"] }
 nih_plug_egui = { git = "https://github.com/robbert-vdh/nih-plug.git", rev = "f36931f7af4646065488a9845d8f8c2f95252c23" }
 
 [profile.release]

LICENSE

@@ -1,73 +1,674 @@
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+
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+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) 2026  Mikkeli Matlock
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) 2026  Mikkeli Matlock
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

NOTICE

@@ -0,0 +1,46 @@
+Plugin Name
+Copyright 2026 Mikkeli Matlock
+
+This product is licensed under the GNU General Public License v3.0 or later.
+See LICENSE for the full terms.
+
+--------------------------------------------------------------------------------
+Third-party material
+--------------------------------------------------------------------------------
+
+Portions of src/lib.rs derive from the NIH-plug cookiecutter template and from
+NIH-plug's `gain` example plugin, both by Robbert van der Helm:
+
+    https://github.com/robbert-vdh/nih-plug-template
+    https://github.com/robbert-vdh/nih-plug
+
+Those portions are licensed under the ISC License:
+
+    ISC License
+
+    Copyright (c) 2022 Robbert van der Helm
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+    SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+    OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+    CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+ISC is GPL-compatible, so this notice is retained rather than superseded.
+
+--------------------------------------------------------------------------------
+Note on the `vst3` feature
+--------------------------------------------------------------------------------
+
+Building with `--features vst3` links `vst3-sys`, which is licensed GPLv3 or
+later. This is the reason a distributed VST3 build must be GPL-licensed. No
+Steinberg SDK source is vendored or redistributed by this project; "VST" is a
+trademark of Steinberg Media Technologies GmbH, and using it to describe a
+distributed product is governed by Steinberg's trademark terms, separately from
+any copyright licence above.

README.md

@@ -13,24 +13,91 @@ cd my-plugin
 
 # Edit: src/lib.rs, Cargo.toml, bundler.toml — replace placeholder values
 # See musiikki/codename-206 for a real-world example of how to fill these in
+
+# Then verify the rename landed everywhere
+sh check-branding.sh
 ```
 
+## Renaming
+
+Identity is duplicated across `Cargo.toml`, `bundler.toml`, `src/lib.rs`, `NOTICE`,
+`Cargo.lock`, the CI workflow and the docs. Nothing makes those agree, so a half-finished
+rename builds a bundle under one name while CI bundles another.
+
+Everything for it lives in `tools/`:
+
+```
+tools/branding.conf         the names, and what derives from what
+tools/branding-sites.tsv    where each name has to appear, and in what form
+tools/brand-plugin.sh       changes names
+tools/check-branding.sh     verifies them
+```
+
+```bash
+sh tools/brand-plugin.sh                         # interactive; Enter keeps a value
+sh tools/brand-plugin.sh --display "Fuzz Box"    # or non-interactive; dry run
+sh tools/brand-plugin.sh --display "Fuzz Box" --apply
+sh tools/check-branding.sh                       # exit 0 = consistent, 1 = drift
+```
+
+**One name drives the rest.** `PLUGIN_NAME` derives the package name (`Fuzz Box` →
+`fuzz_box`), the Rust types (`FuzzBox`, `FuzzBoxParams`) and the display name. Each is
+overridable in `branding.conf`, because the derivation is sometimes wrong and sometimes
+outright invalid — `206 Prototype` derives to `206_prototype`, which Cargo rejects since a
+package name cannot start with a digit. The helper refuses those, along with Rust keywords
+and built-in crate names.
+
+**The checker does both halves.** Every canonical value is asserted *present* where it
+belongs, and every retired spelling is swept for. Absence alone is not enough: renaming to
+the wrong new spelling would pass a stale-sweep and still break CI.
+
+**Two things it will not do for you.** `CLAP_ID` and `VST3_CLASS_ID` are how hosts recognise
+saved projects and presets — change either and every existing session silently loses the
+plugin, with no error. They need `--allow-identity-change`, and the 16-byte class ID is
+*proposed* rather than derived, because that choice is yours. And `CLAP_DESCRIPTION` is
+rejected if it carries a retired name or the repo codename: hosts show it to users who never
+knew your development history.
+
+**The repo name is deliberately not derived.** It is fixed when the repo is created and keeps
+its development codename while the plugin gets a product name. `CODENAME` records it so it
+can be kept out of user-facing text.
+
+Adding a site the template doesn't ship is one row in `branding-sites.tsv` with owner
+`custom` — no shell to edit, and it survives regeneration. Rows the helper owns are rewritten
+on each rename; custom rows are carried through and value-substituted like any other file.
+Both files can be hand-edited; the helper is what keeps them agreeing, so run the checker
+after if you do.
+
 ## Build
 
 ```bash
 # Install Rust via rustup: https://rustup.rs
 # No VST3 SDK needed — NIH-plug bundles its own bindings.
 
-# Build + bundle the VST3 and CLAP
-cargo xtask bundle nih_plug_template --release
+# Build + bundle the CLAP (default)
+cargo xtask bundle plugin_name --release
+
+# Add the VST3 as well — see the licensing note below before you do this
+cargo xtask bundle plugin_name --release --features vst3
 ```
 
-**Output:** `target/bundled/nih_plug_template.vst3` and `nih_plug_template.clap`
+**Output:** `target/bundled/<name>.clap` (and `<name>.vst3` with `--features vst3`), where
+`<name>` is the `name` set in `bundler.toml` — **not** the crate name. Out of the box that
+means `target/bundled/Plugin Name.clap`.
+
+On Linux the egui editor needs the GUI development headers:
+
+```bash
+sudo apt install pkg-config libgl-dev libx11-dev libxcursor-dev libxcb1-dev \
+    libxcb-icccm4-dev libxcb-dri2-0-dev libx11-xcb-dev libxkbcommon-dev libxkbcommon-x11-dev
+```
 
 ## Deploy
 
 ### FL Studio
 
+Build with `--features vst3` first if you want the VST3 (see the licensing note below).
+
 FL Studio scans `C:\Program Files\Common Files\VST3` by default, **ignores directory junctions**
 (so a symlinked bundle is invisible to its scanner), and caches failed scans.
 
@@ -41,33 +108,69 @@ FL Studio scans `C:\Program Files\Common Files\VST3` by default, **ignores direc
 ### Linux
 
 ```bash
-# VST3
-cp target/bundled/nih_plug_template.vst3 ~/.vst3/
-
 # CLAP
-cp target/bundled/nih_plug_template.clap ~/.clap/
+cp -r "target/bundled/Plugin Name.clap" ~/.clap/
+
+# VST3 (only exists if you built with --features vst3)
+cp -r "target/bundled/Plugin Name.vst3" ~/.vst3/
 
 # Or globally:
-# sudo cp target/bundled/nih_plug_template.vst3 /usr/lib/vst3/
-# sudo cp target/bundled/nih_plug_template.clap /usr/lib/clap/
+# sudo cp -r "target/bundled/Plugin Name.clap" /usr/lib/clap/
+# sudo cp -r "target/bundled/Plugin Name.vst3" /usr/lib/vst3/
 ```
 
 ## Project Structure
 
 ```
-Cargo.toml          # Package deps — NIH-plug pinned to codename-206's rev
+Cargo.toml          # Package deps + the opt-in `vst3` feature — NIH-plug pinned to codename-206's rev
 bundler.toml        # Bundle name for `cargo xtask bundle`
-src/lib.rs          # Plugin skeleton — fill in params, DSP, editor
+src/lib.rs          # Plugin skeleton — params, DSP, and egui editor, with one example gain param
 xtask/              # Bundler xtask (cargo xtask bundle)
 .cargo/config.toml  # xtask alias
+tools/              # Branding toolkit — see Renaming
+.gitattributes      # Pins *.sh to LF so Windows checkouts keep a valid shebang
+.github/workflows/  # CI: branding check, both feature sets build, test, bundle
 ```
 
+## CI
+
+`.github/workflows/ci.yaml` gates pushes and PRs on the branding check, a build of both
+feature sets, `cargo test`, and a bundle — enough to catch a rename that only half-landed,
+a `cfg(feature = "vst3")` gate that stopped compiling, or a `bundler.toml` that no longer
+matches the crate name.
+
+It targets `runs-on: rust-audio`, an **org-scoped** runner label. A plugin cloned into a
+different org will not see that runner and its jobs will queue indefinitely rather than fail
+— register a runner advertising the label for that org, or change `runs-on`.
+
+Deliberately not covered: plugin performance. Realtime cost can only be measured meaningfully
+against a real audio deadline, and `Plugin::process()` cannot be called from a test at all
+(`ProcessContext` requires a `Transport`, whose constructor and fields are `pub(crate)` to
+nih-plug). Benchmark your DSP types directly if you need it.
+
 ## License
 
-Apache-2.0
+**GPL-3.0-or-later.** See `LICENSE` for the terms and `NOTICE` for third-party attribution.
 
-## VST3 Licensing Note
+Plugins cloned from this template inherit GPL-3.0-or-later, because the template's own code
+is under it. If you need a permissive plugin, this is the wrong starting point — write the
+skeleton yourself against NIH-plug directly, which is ISC.
 
-You must accept Steinberg's VST3 SDK licence before distributing VST3 binaries.
-NIH-plug's VST3 bindings are GPLv3; if you distribute, the plugin must also be GPLv3
-(or you need a commercial Steinberg licence). CLAP has no such restriction.
+Parts of `src/lib.rs` derive from Robbert van der Helm's NIH-plug cookiecutter template and
+`gain` example, both ISC. ISC is GPL-compatible, so that notice is retained in `NOTICE`
+rather than superseded.
+
+## VST3 and Steinberg
+
+`vst3-sys`, which `nih_export_vst3!()` needs, is GPLv3-or-later — chosen by its own authors,
+who describe their port as a derivative of Steinberg's SDK that "was not made in isolation."
+That obligation is what makes a distributed VST3 build GPL-licensed, and it holds regardless
+of any question about Steinberg's own rights. Being GPL-3.0-or-later already, this template
+satisfies it.
+
+No Steinberg SDK source is vendored or redistributed here, so there is nothing to accept at
+build time. Separately from copyright, **"VST" is a trademark of Steinberg Media Technologies
+GmbH**; describing a distributed product as a VST plugin is governed by their trademark terms.
+If you intend to distribute commercially under that name, that is the part worth legal advice.
+
+CLAP carries none of this — no GPL dependency and no trademark encumbrance.

bundler.toml

@@ -1,7 +1,7 @@
 # Metadata for NIH-plug's `cargo xtask bundle <package>` bundler.
 #
 # [package_name]
-# name = "Human Readable Plugin Name"  # defaults to <package_name>
+# name = "Human Readable Bundle Name"  # defaults to <package_name>
 
-[nih_plug_template]
+[plugin_name]
 name = "Plugin Name"

src/lib.rs

@@ -1,6 +1,7 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 use nih_plug::prelude::*;
+use nih_plug_egui::{create_egui_editor, egui, widgets, EguiState};
 use std::sync::Arc;
 
 // ──────────────────────────────────────────────
@@ -8,31 +9,36 @@ use std::sync::Arc;
 // See musiikki/codename-206/src/params.rs for a real example.
 // ──────────────────────────────────────────────
 
-struct PluginParams;
+#[derive(Params)]
+struct PluginNameParams {
+    /// Editor window size, persisted with the plugin state.
+    #[persist = "editor-state"]
+    editor_state: Arc<EguiState>,
 
-impl Params for PluginParams {
-    fn as_slice(&self) -> &[AtomicParam] {
-        &[]
+    /// Example parameter — replace with your own. The `id` is the stable key the host
+    /// stores automation against, so never change it once you've shipped.
+    #[id = "gain"]
+    gain: FloatParam,
+}
+
+impl Default for PluginNameParams {
+    fn default() -> Self {
+        Self {
+            editor_state: EguiState::from_size(320, 160),
+            gain: FloatParam::new(
+                "Gain",
+                util::db_to_gain(0.0),
+                FloatRange::Skewed {
+                    min: util::db_to_gain(-30.0),
+                    max: util::db_to_gain(30.0),
+                    factor: FloatRange::gain_skew_factor(-30.0, 30.0),
+                },
+            )
+            .with_smoother(SmoothingStyle::Logarithmic(50.0))
+            .with_unit(" dB")
+            .with_value_to_string(formatters::v2s_f32_gain_to_db(2))
+            .with_string_to_value(formatters::s2v_f32_gain_to_db()),
         }
-
-    fn as_mut_slice(&mut self) -> &mut [AtomicParam] {
-        &mut []
-    }
-
-    fn param_by_id(&self, _id: ParamId) -> Option<&AtomicParam> {
-        None
-    }
-
-    fn param_by_id_mut(&mut self, _id: ParamId) -> Option<&mut AtomicParam> {
-        None
-    }
-
-    fn param_by_name(&self, _name: &str) -> Option<&AtomicParam> {
-        None
-    }
-
-    fn param_by_name_mut(&mut self, _name: &str) -> Option<&mut AtomicParam> {
-        None
     }
 }
 
@@ -40,19 +46,12 @@ impl Params for PluginParams {
 // Plugin
 // ──────────────────────────────────────────────
 
-struct MyPlugin {
-    params: Arc<PluginParams>,
+#[derive(Default)]
+struct PluginName {
+    params: Arc<PluginNameParams>,
 }
 
-impl Default for MyPlugin {
-    fn default() -> Self {
-        Self {
-            params: Arc::new(PluginParams),
-        }
-    }
-}
-
-impl Plugin for MyPlugin {
+impl Plugin for PluginName {
     // TODO: Replace these placeholder values with your plugin's metadata.
     const NAME: &'static str = "Plugin Name";
     const VENDOR: &'static str = "Your Name";
@@ -61,20 +60,18 @@ impl Plugin for MyPlugin {
 
     const VERSION: &'static str = env!("CARGO_PKG_VERSION");
 
-    const AUDIO_IO_LAYOUTS: &'static [AudioIOLayout] = &[
-        AudioIOLayout {
+    const AUDIO_IO_LAYOUTS: &'static [AudioIOLayout] = &[AudioIOLayout {
         main_input_channels: NonZeroU32::new(2),
         main_output_channels: NonZeroU32::new(2),
         ..AudioIOLayout::const_default()
-        },
-    ];
+    }];
 
     const MIDI_INPUT: MidiConfig = MidiConfig::None;
     const MIDI_OUTPUT: MidiConfig = MidiConfig::None;
 
     const SAMPLE_ACCURATE_AUTOMATION: bool = true;
 
-    type SysSysexMessage = ();
+    type SysExMessage = ();
     type BackgroundTask = ();
 
     fn params(&self) -> Arc<dyn Params> {
@@ -82,9 +79,19 @@ impl Plugin for MyPlugin {
     }
 
     fn editor(&mut self, _async_executor: AsyncExecutor<Self>) -> Option<Box<dyn Editor>> {
-        // TODO: Implement your egui editor here.
-        // return Some(Box::new(MyEditor::new(self.params.clone())));
-        None
+        // TODO: Build your own egui layout here.
+        let params = self.params.clone();
+        create_egui_editor(
+            self.params.editor_state.clone(),
+            (),
+            |_, _| {},
+            move |egui_ctx, setter, _state| {
+                egui::CentralPanel::default().show(egui_ctx, |ui| {
+                    ui.label("Gain");
+                    ui.add(widgets::ParamSlider::for_param(&params.gain, setter));
+                });
+            },
+        )
     }
 
     fn initialize(
@@ -104,19 +111,21 @@ impl Plugin for MyPlugin {
         _aux: &mut AuxiliaryBuffers,
         _context: &mut impl ProcessContext<Self>,
     ) -> ProcessStatus {
-        // TODO: Implement your DSP here.
-        // This is a passthrough — replace with your audio processing.
+        // TODO: Implement your DSP here. This applies the example gain parameter; note that
+        // the smoother is advanced once per frame so automation doesn't zipper.
         for mut frame in buffer.iter_samples() {
-            for ch in 0..frame.len() {
-                *frame.get_mut(ch).unwrap() = *frame.get(ch).unwrap();
+            let gain = self.params.gain.smoothed.next();
+            for sample in frame.iter_mut() {
+                *sample *= gain;
             }
         }
+
         ProcessStatus::Normal
     }
 }
 
-impl ClapPlugin for MyPlugin {
-    // TODO: Replace with a unique CLAP ID, e.g. "com.your-domain.your-plugin-name"
+impl ClapPlugin for PluginName {
+    // TODO: Replace with a unique CLAP ID in reverse-DNS form, e.g. "com.acme.fuzzbox"
     const CLAP_ID: &'static str = "com.your-domain.plugin-name";
     const CLAP_DESCRIPTION: Option<&'static str> = Some("Your plugin description");
     const CLAP_MANUAL_URL: Option<&'static str> = Some(Self::URL);
@@ -124,13 +133,14 @@ impl ClapPlugin for MyPlugin {
     const CLAP_FEATURES: &'static [ClapFeature] = &[ClapFeature::AudioEffect];
 }
 
-impl Vst3Plugin for MyPlugin {
+#[cfg(feature = "vst3")]
+impl Vst3Plugin for PluginName {
     // TODO: Replace with a unique 16-byte Class ID.
     // Must be exactly 16 bytes — padded with '!' if shorter.
     const VST3_CLASS_ID: [u8; 16] = *b"Unique16CharId!!";
-    const VST3_SUBCATEGORIES: &'static [Vst3SubCategory] =
-        &[Vst3SubCategory::Fx];
+    const VST3_SUBCATEGORIES: &'static [Vst3SubCategory] = &[Vst3SubCategory::Fx];
 }
 
-nih_export_clap!(MyPlugin);
-nih_export_vst3!(MyPlugin);
+nih_export_clap!(PluginName);
+#[cfg(feature = "vst3")]
+nih_export_vst3!(PluginName);

tools/brand-plugin.sh

@@ -0,0 +1,355 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-3.0-or-later
+# brand-plugin.sh - rename this plugin, everywhere, in one go.
+#
+# check-branding.sh tells you what disagrees. This changes it. They share
+# branding.conf: this script rewrites that file and every copy of the old values
+# in tracked files, then runs the checker and reports what it says. A run that
+# ends with the checker green is a rename that landed.
+#
+# Dry run by default:
+#   sh brand-plugin.sh --display "Bari 206"
+#   sh brand-plugin.sh --display "Bari 206" --vendor Novoyuuparosk --apply
+#
+# Options:
+#   --display NAME    the product name, with spaces and capitals. Everything
+#                     else that can be derived, is derived from this.
+#   --pkg NAME        override the derived Cargo package name.
+#   --vendor NAME     --email ADDR    --homepage URL
+#   --description D   --clap-description D
+#   --struct NAME     override the derived Rust type name.
+#   --allow-identity-change   permit CLAP_ID / VST3_CLASS_ID to move. See below.
+#   --apply           actually write. Without it, nothing is modified.
+
+set -u
+# Resolve the repo root: these live in tools/, every path they touch is
+# repo-relative, and they must behave the same wherever they are invoked from.
+cd "$(dirname "$0")/.." || exit 1
+[ -f tools/branding.conf ] || { printf 'tools/branding.conf not found\n' >&2; exit 1; }
+# shellcheck disable=SC1091
+. ./tools/branding.conf
+
+OLD_PKG="$PKG"; OLD_DISPLAY="$DISPLAY"; OLD_PLUGIN_NAME="$PLUGIN_NAME"
+OLD_VENDOR="$VENDOR"; OLD_EMAIL="$EMAIL"; OLD_HOMEPAGE="$HOMEPAGE"; OLD_AUTHOR="$AUTHOR"
+OLD_DESCRIPTION="$DESCRIPTION"; OLD_CLAP_DESCRIPTION="$CLAP_DESCRIPTION"
+OLD_CLAP_ID="$CLAP_ID"; OLD_VST3="$VST3_CLASS_ID"
+OLD_STRUCT="$STRUCT"; OLD_PARAMS_STRUCT="$PARAMS_STRUCT"
+
+new_display=""; new_pkg=""; new_vendor=""; new_email=""; new_homepage=""
+new_description=""; new_clap_description=""; new_struct=""; new_author=""
+new_clap_id=""; new_vst3=""; apply=0; allow_identity=0
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --display)           new_display="${2:?}"; shift 2 ;;
+    --pkg)               new_pkg="${2:?}"; shift 2 ;;
+    --vendor)            new_vendor="${2:?}"; shift 2 ;;
+    --author)            new_author="${2:?}"; shift 2 ;;
+    --email)             new_email="${2:?}"; shift 2 ;;
+    --homepage)          new_homepage="${2:?}"; shift 2 ;;
+    --description)       new_description="${2:?}"; shift 2 ;;
+    --clap-description)  new_clap_description="${2:?}"; shift 2 ;;
+    --struct)            new_struct="${2:?}"; shift 2 ;;
+    --clap-id)           new_clap_id="${2:?}"; shift 2 ;;
+    --vst3-class-id)     new_vst3="${2:?}"; shift 2 ;;
+    --allow-identity-change) allow_identity=1; shift ;;
+    --apply)             apply=1; shift ;;
+    -h|--help)           sed -n '3,25p' "$0"; exit 0 ;;
+    *) printf 'unknown option: %s\n' "$1" >&2; exit 2 ;;
+  esac
+done
+
+# Interactive when nothing was passed and there is a terminal to ask at. Every
+# prompt offers the current value; Enter keeps it, so a run that answers nothing
+# is a no-op rather than a surprise. Optional fields additionally accept "-" to
+# clear them.
+ask() { # ask VARNAME PROMPT CURRENT
+  printf '  %s [%s]: ' "$2" "$3" > /dev/tty
+  IFS= read -r _reply < /dev/tty || _reply=""
+  [ -n "$_reply" ] || _reply="$3"
+  [ "$_reply" = "-" ] && _reply=""
+  eval "$1=\$_reply"
+}
+if [ -z "$new_display" ] && [ -t 0 ] && [ -c /dev/tty ]; then
+  printf 'branding this plugin - Enter keeps the current value, "-" clears an optional one\n\n'
+  ask new_display          "display name    " "$OLD_DISPLAY"
+  ask new_vendor           "vendor (org)    " "$OLD_VENDOR"
+  ask new_author           "cargo author    " "$OLD_AUTHOR"
+  ask new_email            "email           " "$OLD_EMAIL"
+  ask new_homepage         "homepage        " "$OLD_HOMEPAGE"
+  ask new_description      "cargo description" "$OLD_DESCRIPTION"
+  ask new_clap_description "clap description" "$OLD_CLAP_DESCRIPTION"
+  printf '\n'
+fi
+[ -n "$new_display" ] || { printf 'nothing to do: pass --display "New Name" (or run interactively)\n' >&2; exit 2; }
+
+# --- derivation -------------------------------------------------------------
+# Package name: lowercase, every run of non-alphanumerics becomes one separator,
+# ends trimmed. Cargo accepts both hyphens and underscores in a package name and
+# converts to underscores for the built artifact, which nih_plug_xtask already
+# accounts for; underscores are used here to match the Rust convention.
+derive_pkg() {
+  printf '%s' "$1" | tr '[:upper:]' '[:lower:]' \
+    | sed -e 's/[^a-z0-9]\{1,\}/_/g' -e 's/^_//' -e 's/_$//'
+}
+# Rust type name: CamelCase, non-alphanumerics dropped entirely.
+derive_struct() {
+  printf '%s' "$1" | sed -e 's/[^A-Za-z0-9]\{1,\}/ /g' \
+    | awk '{for(i=1;i<=NF;i++) printf "%s%s", toupper(substr($i,1,1)), substr($i,2); print ""}'
+}
+[ -n "$new_pkg" ]    || new_pkg=$(derive_pkg "$new_display")
+[ -n "$new_struct" ] || new_struct=$(derive_struct "$new_display")
+new_params_struct="${new_struct}Params"
+[ -n "$new_vendor" ]      || new_vendor="$OLD_VENDOR"
+[ -n "$new_author" ]      || new_author="$OLD_AUTHOR"
+[ -n "$new_email" ]       || new_email="$OLD_EMAIL"
+[ -n "$new_homepage" ]    || new_homepage="$OLD_HOMEPAGE"
+[ -n "$new_description" ] || new_description="$OLD_DESCRIPTION"
+[ -n "$new_clap_description" ] || new_clap_description="$OLD_CLAP_DESCRIPTION"
+
+# --- validation -------------------------------------------------------------
+fail=0
+die() { printf '  INVALID  %s\n' "$1"; fail=$((fail+1)); }
+
+case "$new_pkg" in
+  "")        die "derived package name is empty" ;;
+  [0-9]*)    die "package name \"$new_pkg\" starts with a digit - cargo rejects this outright" ;;
+esac
+case "$new_pkg" in
+  test|core|std|alloc|proc_macro)
+    die "package name \"$new_pkg\" collides with a built-in crate" ;;
+  as|break|const|continue|crate|dyn|else|enum|extern|false|fn|for|if|impl|in|let|loop|match|mod|move|mut|pub|ref|return|self|static|struct|super|trait|true|type|unsafe|use|where|while|async|await|box|do|final|macro|override|priv|typeof|unsized|virtual|yield|try)
+    die "package name \"$new_pkg\" is a Rust keyword - cargo rejects this" ;;
+esac
+# bundler.toml uses the package name as a TOML bare key.
+case "$new_pkg" in *[!a-zA-Z0-9_-]*) die "package name \"$new_pkg\" is not a valid TOML bare key" ;; esac
+case "$new_struct" in ""|[0-9]*) die "derived type name \"$new_struct\" is not a valid Rust identifier" ;; esac
+
+# --- frozen identity --------------------------------------------------------
+identity_note=""
+if [ -n "$new_clap_id" ] || [ -n "$new_vst3" ]; then
+  if [ "$allow_identity" -eq 0 ]; then
+    die "CLAP_ID / VST3_CLASS_ID are frozen identity; pass --allow-identity-change to move them"
+  fi
+fi
+[ -n "$new_clap_id" ] || new_clap_id="$OLD_CLAP_ID"
+[ -n "$new_vst3" ]    || new_vst3="$OLD_VST3"
+
+# VST3_CLASS_ID is a fixed 16-byte array, so it cannot simply be derived. Propose
+# one from the new name and let a human decide - it is frozen the moment it ships.
+proposed_vst3=$(printf '%s' "${new_struct}Plugin000000000000" | cut -c1-16)
+n=$(printf '%s' "$new_vst3" | wc -c | tr -d ' ')
+[ "$n" -eq 16 ] || die "VST3_CLASS_ID \"$new_vst3\" is $n bytes, must be exactly 16"
+
+case "$new_clap_id" in
+  *\ *|*[A-Z]*) die "CLAP_ID \"$new_clap_id\" must be lowercase with no spaces" ;;
+  *.*) ;;
+  *) die "CLAP_ID \"$new_clap_id\" should be dotted reverse-DNS" ;;
+esac
+
+# CLAP_DESCRIPTION is user-facing: keep development history out of it.
+for hist in "$CODENAME" "$OLD_DISPLAY" "$OLD_PKG"; do
+  case "$new_clap_description" in
+    *"$hist"*) die "CLAP_DESCRIPTION still mentions \"$hist\" - it is shown to users, who never knew the development name" ;;
+  esac
+done
+
+# --- plan -------------------------------------------------------------------
+printf 'rename plan\n\n'
+row() { [ "$2" = "$3" ] && printf '  %-18s %s (unchanged)\n' "$1" "$2" || printf '  %-18s %s  ->  %s\n' "$1" "$2" "$3"; }
+row "package"        "$OLD_PKG"             "$new_pkg"
+row "display"        "$OLD_DISPLAY"         "$new_display"
+row "Plugin::NAME"   "$OLD_PLUGIN_NAME"     "$new_display"
+row "vendor"         "$OLD_VENDOR"          "$new_vendor"
+row "cargo author"   "$OLD_AUTHOR"          "$new_author"
+row "email"          "$OLD_EMAIL"           "$new_email"
+row "homepage"       "$OLD_HOMEPAGE"        "$new_homepage"
+row "description"    "$OLD_DESCRIPTION"     "$new_description"
+row "clap desc"      "$OLD_CLAP_DESCRIPTION" "$new_clap_description"
+row "struct"         "$OLD_STRUCT"          "$new_struct"
+row "params struct"  "$OLD_PARAMS_STRUCT"   "$new_params_struct"
+row "CLAP_ID"        "$OLD_CLAP_ID"         "$new_clap_id"
+row "VST3_CLASS_ID"  "$OLD_VST3"            "$new_vst3"
+printf '\n  repo codename stays %s - fixed at creation, never renamed\n' "$CODENAME"
+if [ "$new_vst3" = "$OLD_VST3" ]; then
+  printf '  suggested VST3_CLASS_ID for this name (16 bytes): "%s"\n' "$proposed_vst3"
+  printf '    apply with --vst3-class-id "%s" --allow-identity-change, and only before first release\n' "$proposed_vst3"
+fi
+
+if [ "$fail" -ne 0 ]; then
+  printf '\n%d problem(s); nothing written.\n' "$fail"
+  exit 1
+fi
+
+if [ "$apply" -eq 0 ]; then
+  printf '\nDry run. Re-run with --apply to write these changes.\n'
+  exit 0
+fi
+
+# --- apply ------------------------------------------------------------------
+# Three scratch files, one trap: the regenerated site table, the rows carried
+# through from the old one, and the value-substitution pairs.
+gen="$(mktemp)"; keep="$(mktemp)"; subst_file="$(mktemp)"
+trap 'rm -f "$gen" "$keep" "$subst_file"' EXIT
+
+T="$(printf '\t')"
+{
+  printf 'req%spkg.cargo%sCargo.toml%sname = "%s"\n'            "$T" "$T" "$T" "$new_pkg"
+  printf 'req%spkg.bundler%sbundler.toml%s[%s]\n'               "$T" "$T" "$T" "$new_pkg"
+  printf 'opt%spkg.lock%sCargo.lock%sname = "%s"\n'             "$T" "$T" "$T" "$new_pkg"
+  printf 'opt%spkg.ci%s.github/workflows/ci.yaml%scargo xtask bundle %s\n' "$T" "$T" "$T" "$new_pkg"
+  printf 'opt%spkg.readme%sREADME.md%scargo xtask bundle %s\n'  "$T" "$T" "$T" "$new_pkg"
+  printf 'req%sdisplay.bundler%sbundler.toml%sname = "%s"\n'    "$T" "$T" "$T" "$new_display"
+  printf 'opt%sdisplay.notice%sNOTICE%s%s\n'                    "$T" "$T" "$T" "$new_display"
+  printf 'req%sname.plugin%s%s%sconst NAME: &'"'"'static str = "%s"\n'        "$T" "$T" "$LIB_FILE" "$T" "$new_display"
+  printf 'req%svendor.plugin%s%s%sconst VENDOR: &'"'"'static str = "%s"\n'    "$T" "$T" "$LIB_FILE" "$T" "$new_vendor"
+  printf 'req%semail.plugin%s%s%sconst EMAIL: &'"'"'static str = "%s"\n'      "$T" "$T" "$LIB_FILE" "$T" "$new_email"
+  printf 'req%sauthors.cargo%sCargo.toml%sauthors = ["%s <%s>"]\n' "$T" "$T" "$T" "$new_author" "$new_email"
+  printf 'req%shomepage.cargo%sCargo.toml%shomepage = "%s"\n'   "$T" "$T" "$T" "$new_homepage"
+  printf 'req%surl.plugin%s%s%sconst URL: &'"'"'static str = env!("CARGO_PKG_HOMEPAGE")\n' "$T" "$T" "$LIB_FILE" "$T"
+  printf 'req%sdescription.cargo%sCargo.toml%sdescription = "%s"\n' "$T" "$T" "$T" "$new_description"
+  # Narrowest distinctive fragment, not the whole statement: rustfmt wraps a long
+  # CLAP_DESCRIPTION onto its own line, and a pattern spanning the assignment
+  # would then never match a correctly formatted file.
+  printf 'req%sdescription.clap%s%s%sSome("%s")\n' "$T" "$T" "$LIB_FILE" "$T" "$new_clap_description"
+  printf 'req%sclapid.plugin%s%s%sconst CLAP_ID: &'"'"'static str = "%s"\n'  "$T" "$T" "$LIB_FILE" "$T" "$new_clap_id"
+  printf 'req%svst3id.plugin%s%s%sconst VST3_CLASS_ID: [u8; 16] = *b"%s"\n'  "$T" "$T" "$LIB_FILE" "$T" "$new_vst3"
+  printf 'req%sstruct.def%s%s%sstruct %s {\n'                   "$T" "$T" "$LIB_FILE" "$T" "$new_struct"
+  printf 'req%sstruct.plugin%s%s%simpl Plugin for %s {\n'       "$T" "$T" "$LIB_FILE" "$T" "$new_struct"
+  printf 'req%sstruct.clap%s%s%simpl ClapPlugin for %s {\n'     "$T" "$T" "$LIB_FILE" "$T" "$new_struct"
+  printf 'req%sstruct.vst3%s%s%simpl Vst3Plugin for %s {\n'     "$T" "$T" "$LIB_FILE" "$T" "$new_struct"
+  printf 'req%sstruct.exportclap%s%s%snih_export_clap!(%s);\n'  "$T" "$T" "$LIB_FILE" "$T" "$new_struct"
+  printf 'req%sstruct.exportvst3%s%s%snih_export_vst3!(%s);\n'  "$T" "$T" "$LIB_FILE" "$T" "$new_struct"
+  printf 'req%sparams.def%s%s%sstruct %s {\n'                   "$T" "$T" "$PARAMS_FILE" "$T" "$new_params_struct"
+  printf 'req%sparams.default%s%s%simpl Default for %s {\n'     "$T" "$T" "$PARAMS_FILE" "$T" "$new_params_struct"
+  printf 'req%sparams.field%s%s%sparams: Arc<%s>,\n'            "$T" "$T" "$LIB_FILE" "$T" "$new_params_struct"
+  printf 'opt%sdeploy.pkg%sdeploy.ps1%s$Package = "%s"\n'       "$T" "$T" "$T" "$new_pkg"
+  printf 'opt%sdeploy.vst3%sdeploy.ps1%s$vst3Name = "%s.vst3"\n' "$T" "$T" "$T" "$new_display"
+  printf 'opt%sdeploy.clap%sdeploy.ps1%s$clapName = "%s.clap"\n' "$T" "$T" "$T" "$new_display"
+} > "$gen"
+
+# Pass 1 - site-directed. Each owned row in the existing table carries the OLD
+# resolved literal for its site; the regenerated row carries the new one. Rewriting
+# by that pair is unambiguous, which plain value substitution is not: AUTHOR
+# defaults to VENDOR, so both fields can hold the same old string and a global
+# replace cannot tell which occurrence belongs to which. This must run BEFORE
+# pass 2, or the global replace consumes the old literals first and leaves the
+# precise rewrite with nothing to match.
+sites="tools/branding-sites.tsv"
+T="$(printf '\t')"
+if [ -f "$sites" ]; then
+  while IFS="$T" read -r ok_ oo_ of_ op_; do
+    case "$ok_" in ''|\#*) continue ;; esac
+    np_=$(awk -F"$T" -v o="$oo_" '$2==o {print $4; exit}' "$gen")
+    [ -n "$np_" ] || continue
+    [ "$np_" != "$op_" ] || continue
+    [ -f "$of_" ] || continue
+    esc_o=$(printf '%s' "$op_" | sed 's/[][\.*^$/|&]/\\&/g')
+    esc_n=$(printf '%s' "$np_" | sed 's/[\\/&|]/\\&/g')
+    tmp_=$(mktemp)
+    sed "s|$esc_o|$esc_n|g" "$of_" > "$tmp_" && cat "$tmp_" > "$of_"
+    rm -f "$tmp_"
+  done < "$sites"
+  printf '  pass 1: rewrote known sites from the table\n'
+fi
+
+# Pass 2 - value substitution, for everything the table does not enumerate:
+# doc comments, use sites in other modules, prose in the README.
+# Longest values first: a shorter spelling can be a substring of a longer one
+# (the package name inside a URL, say), and replacing it first would corrupt the
+# longer match. branding.conf is excluded and rewritten wholesale below, so its
+# STALE list is never rewritten into meaninglessness.
+{
+  printf '%s\t%s\n' "$OLD_CLAP_ID" "$new_clap_id"
+  printf '%s\t%s\n' "$OLD_HOMEPAGE" "$new_homepage"
+  printf '%s\t%s\n' "$OLD_CLAP_DESCRIPTION" "$new_clap_description"
+  printf '%s\t%s\n' "$OLD_DESCRIPTION" "$new_description"
+  printf '%s\t%s\n' "$OLD_PARAMS_STRUCT" "$new_params_struct"
+  printf '%s\t%s\n' "$OLD_VST3" "$new_vst3"
+  printf '%s\t%s\n' "$OLD_PLUGIN_NAME" "$new_display"
+  printf '%s\t%s\n' "$OLD_DISPLAY" "$new_display"
+  printf '%s\t%s\n' "$OLD_STRUCT" "$new_struct"
+  printf '%s\t%s\n' "$OLD_EMAIL" "$new_email"
+  printf '%s\t%s\n' "$OLD_AUTHOR" "$new_author"
+  printf '%s\t%s\n' "$OLD_VENDOR" "$new_vendor"
+  printf '%s\t%s\n' "$OLD_PKG" "$new_pkg"
+} | awk -F'\t' '$1 != $2 { print length($1)"\t"$0 }' | sort -rn | cut -f2- > "$subst_file"
+
+changed=0
+git ls-files 2>/dev/null | while IFS= read -r f; do
+  [ -f "$f" ] || continue
+  # branding.conf alone is excluded: it is rewritten wholesale below, and its
+  # STALE list names every retired spelling by design. The site table IS
+  # substituted, so hand-added custom rows track the rename; owned rows are
+  # regenerated afterwards regardless.
+  case "$f" in tools/branding.conf) continue ;; esac
+  before=$(cat "$f")
+  after="$before"
+  while IFS="$(printf '\t')" read -r old new; do
+    [ -n "$old" ] || continue
+    after=$(printf '%s' "$after" | sed "s|$(printf '%s' "$old" | sed 's/[][\.*^$/|&]/\\&/g')|$(printf '%s' "$new" | sed 's/[\\/&|]/\\&/g')|g")
+  done < "$subst_file"
+  if [ "$before" != "$after" ]; then printf '%s\n' "$after" > "$f"; printf '  rewrote %s\n' "$f"; fi
+done
+
+# branding.conf last, with the retired spellings appended to STALE so the next
+# run of the checker sweeps for anything this pass missed.
+# Deduplicated: two fields can retire to the same spelling - DISPLAY and
+# PLUGIN_NAME are commonly identical - and listing it twice makes the checker
+# report the same drift twice. Note that neither this script nor the checker
+# contains a branding literal anywhere: both read every name from
+# branding.conf, so a rename never has to rewrite its own tooling.
+retired=$(cut -f1 "$subst_file" | awk '!seen[$0]++')
+sed -e "s|^PKG=.*|PKG=\"$new_pkg\"|" \
+    -e "s|^DISPLAY=.*|DISPLAY=\"$new_display\"|" \
+    -e "s|^PLUGIN_NAME=.*|PLUGIN_NAME=\"$new_display\"|" \
+    -e "s|^VENDOR=.*|VENDOR=\"$new_vendor\"|" \
+    -e "s|^# *AUTHOR=.*|AUTHOR=\"$new_author\"|" \
+    -e "s|^AUTHOR=.*|AUTHOR=\"$new_author\"|" \
+    -e "s|^EMAIL=.*|EMAIL=\"$new_email\"|" \
+    -e "s|^HOMEPAGE=.*|HOMEPAGE=\"$new_homepage\"|" \
+    -e "s|^DESCRIPTION=.*|DESCRIPTION=\"$new_description\"|" \
+    -e "s|^CLAP_DESCRIPTION=.*|CLAP_DESCRIPTION=\"$new_clap_description\"|" \
+    -e "s|^CLAP_ID=.*|CLAP_ID=\"$new_clap_id\"|" \
+    -e "s|^VST3_CLASS_ID=.*|VST3_CLASS_ID=\"$new_vst3\"|" \
+    -e "s|^STRUCT=.*|STRUCT=\"$new_struct\"|" \
+    -e "s|^PARAMS_STRUCT=.*|PARAMS_STRUCT=\"$new_params_struct\"|" \
+    tools/branding.conf > tools/branding.conf.new
+if [ -n "$retired" ]; then
+  { sed '$ s/"$//' tools/branding.conf.new; printf '%s"\n' "$retired"; } > tools/branding.conf
+else
+  # Nothing retired (a no-op rename, or a regeneration): leave STALE untouched
+  # rather than appending a blank line to it on every run.
+  cat tools/branding.conf.new > tools/branding.conf
+fi
+rm -f tools/branding.conf.new
+if [ "$new_author" = "$new_vendor" ]; then
+  # Identical to VENDOR, so re-comment it: the conf should keep showing that this
+  # value derives rather than pinning a duplicate that then has to be maintained.
+  tmp_c=$(mktemp)
+  sed "s|^AUTHOR=.*|# AUTHOR=\"$new_author\"|" tools/branding.conf > "$tmp_c" && cat "$tmp_c" > tools/branding.conf
+  rm -f "$tmp_c"
+fi
+printf '  rewrote tools/branding.conf (retired spellings appended to STALE)\n'
+
+# Regenerate the site table. Rows whose owner this script recognises are
+# rewritten with the new resolved literals; every other row - anything marked
+# custom, or added by hand for a file this template does not ship - is carried
+# through untouched. Clobbering those silently is how a tool stops being trusted.
+sites="tools/branding-sites.tsv"
+
+owned=$(cut -f2 "$gen")
+if [ -f "$sites" ]; then
+  grep '^#' "$sites" > "$keep" 2>/dev/null || : > "$keep"
+  while IFS="$T" read -r k o f pat; do
+    case "$k" in ''|\#*) continue ;; esac
+    printf '%s\n' "$owned" | grep -qxF "$o" || printf '%s%s%s%s%s%s%s\n' "$k" "$T" "$o" "$T" "$f" "$T" "$pat" >> "$keep"
+  done < "$sites"
+else
+  : > "$keep"
+fi
+{ cat "$keep"; cat "$gen"; } > "$sites"
+printf '  rewrote %s (%s owned rows, %s preserved)\n' "$sites" "$(wc -l < "$gen" | tr -d ' ')" "$(grep -cv '^#' "$keep" 2>/dev/null || echo 0)"
+
+printf '\nverifying with check-branding.sh\n\n'
+sh tools/check-branding.sh

tools/branding-sites.tsv

@@ -0,0 +1,45 @@
+# branding-sites.tsv - every place a canonical name has to appear, and in what form.
+#
+# Generated and refreshed by tools/brand-plugin.sh; read by tools/check-branding.sh,
+# which asserts each pattern is present in its file. Tab-separated, four columns:
+#
+#   kind    req = a missing file is a failure; opt = a missing file is a skip
+#   owner   the brand-plugin.sh rule that manages this row, or "custom" for rows
+#           you added by hand. Custom rows are preserved across regeneration;
+#           owned rows are overwritten, so do not hand-edit those.
+#   file    repo-relative path
+#   pattern literal text that must appear in that file, already resolved
+#
+# Adding a site for something the template does not ship is a one-line edit here
+# with owner "custom" - no shell to change, and it survives the next rename.
+#
+#kind	owner	file	pattern
+req	pkg.cargo	Cargo.toml	name = "plugin_name"
+req	pkg.bundler	bundler.toml	[plugin_name]
+opt	pkg.lock	Cargo.lock	name = "plugin_name"
+opt	pkg.ci	.github/workflows/ci.yaml	cargo xtask bundle plugin_name
+opt	pkg.readme	README.md	cargo xtask bundle plugin_name
+req	display.bundler	bundler.toml	name = "Plugin Name"
+opt	display.notice	NOTICE	Plugin Name
+req	name.plugin	src/lib.rs	const NAME: &'static str = "Plugin Name"
+req	vendor.plugin	src/lib.rs	const VENDOR: &'static str = "Your Name"
+req	email.plugin	src/lib.rs	const EMAIL: &'static str = "your@email.com"
+req	authors.cargo	Cargo.toml	authors = ["Your Name <your@email.com>"]
+req	homepage.cargo	Cargo.toml	homepage = "https://wiki.novoyuuparosk.org"
+req	url.plugin	src/lib.rs	const URL: &'static str = env!("CARGO_PKG_HOMEPAGE")
+req	description.cargo	Cargo.toml	description = "A minimal NIH-plug audio plugin"
+req	description.clap	src/lib.rs	Some("Your plugin description")
+req	clapid.plugin	src/lib.rs	const CLAP_ID: &'static str = "com.your-domain.plugin-name"
+req	vst3id.plugin	src/lib.rs	const VST3_CLASS_ID: [u8; 16] = *b"Unique16CharId!!"
+req	struct.def	src/lib.rs	struct PluginName {
+req	struct.plugin	src/lib.rs	impl Plugin for PluginName {
+req	struct.clap	src/lib.rs	impl ClapPlugin for PluginName {
+req	struct.vst3	src/lib.rs	impl Vst3Plugin for PluginName {
+req	struct.exportclap	src/lib.rs	nih_export_clap!(PluginName);
+req	struct.exportvst3	src/lib.rs	nih_export_vst3!(PluginName);
+req	params.def	src/lib.rs	struct PluginNameParams {
+req	params.default	src/lib.rs	impl Default for PluginNameParams {
+req	params.field	src/lib.rs	params: Arc<PluginNameParams>,
+opt	deploy.pkg	deploy.ps1	$Package = "plugin_name"
+opt	deploy.vst3	deploy.ps1	$vst3Name = "Plugin Name.vst3"
+opt	deploy.clap	deploy.ps1	$clapName = "Plugin Name.clap"

tools/branding.conf

@@ -0,0 +1,99 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# branding.conf - this plugin's canonical identity.
+#
+# Managed by tools/brand-plugin.sh, read by tools/check-branding.sh. Hand-editing
+# works and is sometimes the quickest thing, but the helper is what keeps this
+# file, the source tree and tools/branding-sites.tsv agreeing with each other.
+# Edit here and you are on the hook for running the checker afterwards.
+
+# --- derivations ------------------------------------------------------------
+# Defined before the values so the defaults below can use them.
+# Package name: lowercased, every run of non-alphanumerics becomes one
+# underscore. Cargo accepts hyphens too and maps them to underscores for the
+# built artifact, which nih_plug_xtask already handles; underscores are used to
+# match the Rust convention.
+_derive_pkg() {
+  printf '%s' "$1" | tr '[:upper:]' '[:lower:]' \
+    | sed -e 's/[^a-z0-9]\{1,\}/_/g' -e 's/^_//' -e 's/_$//'
+}
+# Rust type name: CamelCase, non-alphanumerics dropped.
+_derive_struct() {
+  printf '%s' "$1" | sed -e 's/[^A-Za-z0-9]\{1,\}/ /g' \
+    | awk '{for(i=1;i<=NF;i++) printf "%s%s", toupper(substr($i,1,1)), substr($i,2); print ""}'
+}
+
+# --- the names ---------------------------------------------------------------
+PLUGIN_NAME="Plugin Name"
+VENDOR="Your Name"
+EMAIL="your@email.com"
+# Cargo's authors entry names whoever wrote it, which is not always the vendor:
+# an org ships the plugin, a person authored it. Defaults to VENDOR when the two
+# are the same, which is the common case for a one-person project.
+# AUTHOR="Your Name"
+HOMEPAGE="https://wiki.novoyuuparosk.org"
+DESCRIPTION="A minimal NIH-plug audio plugin"
+
+# What the plugin does *now*. No codename, no "prototype", no "v2 rewrite" -
+# hosts show this to users who never knew any of that. check-branding.sh
+# enforces the mechanical half by rejecting retired names and the repo codename.
+CLAP_DESCRIPTION="Your plugin description"
+
+# --- frozen identity ---------------------------------------------------------
+# Hosts key saved projects and presets off these two. Change either and every
+# existing session silently loses the plugin: the track comes up empty, with no
+# error. Choose once before the first release, then never again.
+# brand-plugin.sh refuses to move them without --allow-identity-change.
+CLAP_ID="com.your-domain.plugin-name"
+VST3_CLASS_ID="Unique16CharId!!"
+
+# --- fixed at repo creation --------------------------------------------------
+# The repository's own name. Deliberately NOT renamed when the plugin is: the
+# repo keeps its development codename while the plugin gets a product name.
+# Recorded only so it can be kept out of user-facing text.
+CODENAME="nih-plug-template"
+
+# Where the two Rust types are defined. A plugin whose params outgrow lib.rs
+# points PARAMS_FILE at src/params.rs.
+LIB_FILE="src/lib.rs"
+PARAMS_FILE="src/lib.rs"
+
+# --- derived unless overridden -----------------------------------------------
+# Set one only when the derivation is wrong or rejected - a name like
+# "206 Prototype" derives to "206_prototype", which cargo refuses because a
+# package name cannot start with a digit.
+#
+# This template overrides three of them, which a real plugin usually will not:
+# its package and type names are the template's own rather than derived from a
+# product name. Delete these three lines after renaming and the derivations
+# from PLUGIN_NAME take over.
+PKG="plugin_name"
+STRUCT="PluginName"
+PARAMS_STRUCT="PluginNameParams"
+# DISPLAY="Plugin Name"      # defaults to PLUGIN_NAME
+: "${AUTHOR:=$VENDOR}"
+: "${DISPLAY:=$PLUGIN_NAME}"
+: "${PKG:=$(_derive_pkg "$PLUGIN_NAME")}"
+: "${STRUCT:=$(_derive_struct "$PLUGIN_NAME")}"
+: "${PARAMS_STRUCT:=${STRUCT}Params}"
+
+# --- retired spellings -------------------------------------------------------
+# Must no longer appear in tracked files. An entry is skipped while it is still
+# part of a canonical value above and arms the moment it stops being one, so a
+# rename is self-checking in both directions. brand-plugin.sh appends here.
+STALE="nih_plug_template
+MyPlugin
+PluginParams
+A minimal NIH-plug audio plugin
+Your plugin description
+Plugin Name
+Your Name
+your@email.com
+com.your-domain.plugin-name
+Unique16CharId!!
+YOUR-USERNAME
+YOUR-PLUGIN-NAME
+your-domain
+https://github.com/YOUR-USERNAME/YOUR-PLUGIN-NAME
+nih_plug_template
+PluginParams
+MyPlugin"

tools/check-branding.sh

@@ -0,0 +1,188 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-3.0-or-later
+# check-branding.sh - verify the plugin's branding/identity strings agree everywhere.
+#
+# Plugin branding is duplicated across the build manifest, the bundler manifest,
+# the source, the docs and (once you add one) the deploy script. Nothing makes
+# them agree, so a rename drifts silently: the bundle builds under one name and
+# the deploy script looks for another. This asserts they match, and that the
+# identity constants are legal.
+#
+# In a template this matters more than usual: renaming is the first thing you do
+# with this repo, and it touches every file below. Run this immediately after,
+# and the STALE machinery will list whatever you missed.
+#
+# Usage: sh tools/check-branding.sh          (exit 0 = consistent, 1 = drift found)
+#
+# The canonical identity lives in branding.conf, shared with brand-plugin.sh.
+# Edit it there, then run this to find every copy that still holds the old value.
+
+set -u
+# Resolve the repo root: these live in tools/, every path they touch is
+# repo-relative, and they must behave the same wherever they are invoked from.
+cd "$(dirname "$0")/.." || exit 1
+
+if [ ! -f tools/branding.conf ]; then
+  printf 'tools/branding.conf not found\n' >&2
+  exit 1
+fi
+# shellcheck disable=SC1091
+. ./tools/branding.conf
+
+# Every canonical spelling concatenated, for the substring test below.
+CANONICAL_BLOB="$PKG
+$DESCRIPTION
+$CLAP_DESCRIPTION
+$STRUCT
+$PARAMS_STRUCT
+$DISPLAY
+$PLUGIN_NAME
+$VENDOR
+$EMAIL
+$HOMEPAGE
+$CLAP_ID
+$VST3_CLASS_ID"
+
+pass=0; fail=0; skip=0
+ok()   { pass=$((pass+1)); printf '  ok    %s\n' "$1"; }
+bad()  { fail=$((fail+1)); printf '  FAIL  %s\n' "$1"; [ $# -gt 1 ] && printf '        %s\n' "$2"; return 0; }
+note() { skip=$((skip+1)); printf '  skip  %s\n' "$1"; }
+# Reported for awareness only - never counted, never fails the run.
+info() { printf '  --    %s\n' "$1"; }
+
+# has FILE PATTERN -> fixed-string search
+has() { grep -qF "$2" "$1" 2>/dev/null; }
+
+check() { # check LABEL FILE LITERAL
+  if [ ! -f "$2" ]; then bad "$1" "missing file: $2"; return; fi
+  if has "$2" "$3"; then ok "$1"; else bad "$1" "$2 does not contain: $3"; fi
+}
+
+# Same as check, but a missing file is "not applicable yet" rather than drift.
+# The template ships without a deploy script; this starts checking once you add one.
+opt_check() { # opt_check LABEL FILE LITERAL
+  if [ ! -f "$2" ]; then note "$1 ($2 not present)"; return; fi
+  if has "$2" "$3"; then ok "$1"; else bad "$1" "$2 does not contain: $3"; fi
+}
+
+printf 'branding check (canonical: %s / "%s")\n\n' "$PKG" "$DISPLAY"
+
+# --- consistency: every site in the table holds its resolved literal ----------
+# The table is data, so adding a site is a row rather than a shell edit, and the
+# same script runs unmodified across every plugin built from this template.
+SITES="tools/branding-sites.tsv"
+if [ ! -f "$SITES" ]; then
+  bad "site table" "$SITES not found - run tools/brand-plugin.sh to generate it"
+else
+  printf 'sites\n'
+  while IFS="$(printf '\t')" read -r kind owner file pattern; do
+    case "$kind" in ''|\#*) continue ;; esac
+    [ -n "$pattern" ] || continue
+    label="$owner"
+    if [ ! -f "$file" ]; then
+      case "$kind" in
+        opt) note "$label ($file not present)" ;;
+        *)   bad  "$label" "missing file: $file" ;;
+      esac
+      continue
+    fi
+    if has "$file" "$pattern"; then ok "$label"
+    else bad "$label" "$file does not contain: $pattern"; fi
+  done < "$SITES"
+fi
+
+# --- validity: rules the table cannot express --------------------------------
+printf '\nvalidity\n'
+
+# VST3 class IDs are a fixed 16-byte array. A wrong length is a compile error,
+# but saying so here is clearer than reading rustc on it.
+n=$(printf '%s' "$VST3_CLASS_ID" | wc -c | tr -d ' ')
+if [ "$n" -eq 16 ]; then ok "VST3_CLASS_ID is 16 bytes"
+else bad "VST3_CLASS_ID is 16 bytes" "got $n bytes: \"$VST3_CLASS_ID\""; fi
+
+# CLAP IDs are reverse-DNS by convention and compared verbatim by hosts, so a
+# stray space or capital is a silent identity change between machines.
+case "$CLAP_ID" in
+  *\ *|*[A-Z]*) bad "CLAP_ID is reverse-DNS safe" "no spaces or capitals allowed: \"$CLAP_ID\"" ;;
+  *.*)          ok  "CLAP_ID is reverse-DNS safe" ;;
+  *)            bad "CLAP_ID is reverse-DNS safe" "expected dotted reverse-DNS, got: \"$CLAP_ID\"" ;;
+esac
+
+# An overridden package name is legitimate - the derivation is sometimes invalid
+# - but a display rename that forgot the package is not, and looks identical
+# from here. Reported, never failed.
+derived_pkg=$(_derive_pkg "$PLUGIN_NAME")
+[ "$PKG" = "$derived_pkg" ] || info "PKG \"$PKG\" differs from the derivation of PLUGIN_NAME (\"$derived_pkg\") - fine if deliberate"
+
+# CLAP_DESCRIPTION is shown to users in a host's plugin browser. "Free of
+# development history" is a judgement a script cannot make, but the failure it
+# produces is mechanical: a retired name or the repo codename surviving in it.
+hygiene_hits=""
+while IFS= read -r s_entry; do
+  [ -n "$s_entry" ] || continue
+  case "$CANONICAL_BLOB" in *"$s_entry"*) continue ;; esac
+  case "$CLAP_DESCRIPTION" in *"$s_entry"*) hygiene_hits="$hygiene_hits \"$s_entry\"" ;; esac
+done <<HYGIENE_LIST
+$STALE
+$CODENAME
+HYGIENE_LIST
+if [ -z "$hygiene_hits" ]; then ok "CLAP_DESCRIPTION carries no retired name or codename"
+else bad "CLAP_DESCRIPTION carries no retired name or codename" "found:$hygiene_hits"; fi
+
+printf '\nstale spellings\n'
+# File list for the scan below. Prefer git, so build output and any vendored
+# tree stay out of it. Fall back to find when this is not a checkout - an
+# exported tarball, or a CI step that fetched without git metadata - because
+# `git ls-files` there returns nothing, and an empty list would report every
+# stale spelling as absent. A check that passes hardest when it can see least
+# is worse than no check.
+if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+  file_list() { git ls-files; }
+  scan_source="git"
+else
+  file_list() { find . -path ./.git -prune -o -path ./target -prune -o -type f -print | sed 's|^\./||'; }
+  scan_source="find (not a git checkout)"
+fi
+info "scanning tracked files via $scan_source"
+# Fed by here-doc rather than a pipe on purpose: a piped `while` runs in a
+# subshell, and the pass/fail counters it increments would be discarded.
+while IFS= read -r s; do
+  [ -n "$s" ] || continue
+
+  # Still part of a canonical value? Then it is current branding, not a leftover.
+  # This is what lets the list ship pre-seeded: entries arm themselves as you
+  # rename. Substring, not equality, because placeholders nest - "your-domain"
+  # lives inside the canonical CLAP_ID, and "YOUR-USERNAME" inside the homepage.
+  # Over-skipping is the safe direction: a false FAIL on a name you still use
+  # would train you to ignore this section.
+  case "$CANONICAL_BLOB" in
+    *"$s"*) note "\"$s\" (still canonical)"; continue ;;
+  esac
+
+  # These two name every retired spelling by definition - the STALE list lives in
+  # branding.conf and this script reads it - so neither can ever be a real hit.
+  hits=$(file_list 2>/dev/null | while read -r f; do
+           case "$f" in tools/check-branding.sh|tools/branding.conf) continue ;; esac
+           [ -f "$f" ] && grep -lF "$s" "$f" 2>/dev/null
+         done)
+  if [ -z "$hits" ]; then ok "no occurrences of \"$s\""
+  else bad "no occurrences of \"$s\"" "still present in: $(echo "$hits" | tr '\n' ' ')"; fi
+done <<STALE_LIST
+$STALE
+STALE_LIST
+
+# Template scaffolding, not drift: TODOs are legitimate while you are still
+# building. Reported so a finished plugin does not quietly ship with them.
+# `grep -c` prints 0 AND exits 1 when there are no matches, so `|| echo 0`
+# would append a second zero and make the count unparseable. Swallow the
+# status instead, and default an empty result (missing file) to zero.
+todos=$(grep -c 'TODO' src/lib.rs 2>/dev/null || :)
+[ -n "$todos" ] || todos=0
+printf '\nscaffolding\n'
+if [ "$todos" -eq 0 ]; then ok "no TODO markers left in src/lib.rs"
+else info "$todos TODO marker(s) still in src/lib.rs (not a failure)"; fi
+
+printf '\n%d passed, %d failed' "$pass" "$fail"
+[ "$skip" -gt 0 ] && printf ', %d skipped' "$skip"
+printf '\n'
+[ "$fail" -eq 0 ] || exit 1

xtask/Cargo.toml

@@ -2,6 +2,7 @@
 name = "xtask"
 version = "0.1.0"
 edition = "2021"
+license = "GPL-3.0-or-later"
 
 [dependencies]
 nih_plug_xtask = { git = "https://github.com/robbert-vdh/nih-plug.git", rev = "f36931f7af4646065488a9845d8f8c2f95252c23" }

xtask/src/main.rs

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: GPL-3.0-or-later
 
 fn main() -> nih_plug_xtask::Result<()> {
     nih_plug_xtask::main()