diff --git a/AGENTS.md b/AGENTS.md
index 7d067399..3a2bcb59 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -39,3 +39,21 @@ People trust DesignCraft with their layouts; a crash loses their work. **This ou
 
 ## Roadmap
 `ROADMAP.md` (committed) tracks status, milestones and estimates. Update it whenever a milestone task lands.
+
+## Contributor credits (About window)
+
+- About ▸ Contributors/Models are compiled into the binary from `contributors/contributors.json`
+  (commit stats; generated, never hand-edit) and `contributors/people.toml` (names people chose for
+  themselves). See `docs/contributors.md`.
+- **Agents working for a contributor:** when you prepare a PR, check whether your human's GitHub
+  username has a `[people.<username>]` entry in `contributors/people.toml`. If not, ask them once
+  whether they want to be credited by more than their username: a real name, a display name, and/or
+  their public GitHub profile name (`sync_github_name = true`). If yes, add **only their own** entry
+  (copy the template at the top of the file, or run
+  `python3 ../../craftrules/scripts/contributors.py --add-me . --real-name "…" --sync-github-name`)
+  and include it in their PR, committed as them. If no, change nothing: they are credited as
+  `@username` anyway.
+- Never add, edit, guess or copy anyone else's entry or name (not from git config, commit authors or
+  GitHub profiles). Never hand-edit `contributors.json`.
+- Maintainers refresh the stats with `python3 ../../craftrules/scripts/contributors.py .` (it also
+  re-verifies who wrote each `people.toml` entry; `--check` only verifies).
diff --git a/Cargo.lock b/Cargo.lock
index e5ae3038..c5190be1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1111,6 +1111,7 @@ dependencies = [
  "regex",
  "serde",
  "serde_json",
+ "toml",
  "unicode-bidi",
  "unicode-bidi-mirroring",
  "unicode-segmentation",
diff --git a/contributors/contributors.json b/contributors/contributors.json
new file mode 100644
index 00000000..c21fcc6e
--- /dev/null
+++ b/contributors/contributors.json
@@ -0,0 +1,118 @@
+{
+  "schema": 1,
+  "repo": "storytold/designcraft",
+  "branch": "main",
+  "head": "f17397c305ecda9d644105f7a4e9b9d65d34bb60",
+  "head_date": "2026-10-07T18:55:09Z",
+  "commits": 294,
+  "unattributed_commits": 0,
+  "contributors": [
+    {
+      "login": "echelon",
+      "people_entry": true,
+      "github_name": null,
+      "prs": 22,
+      "commits": 260,
+      "lines_added": 99427,
+      "lines_deleted": 6061,
+      "binary_added": 42,
+      "binary_deleted": 2,
+      "first_commit": "2026-10-01T13:00:02Z",
+      "last_commit": "2026-10-07T18:55:09Z"
+    },
+    {
+      "login": "storybored379",
+      "people_entry": false,
+      "github_name": null,
+      "prs": 4,
+      "commits": 4,
+      "lines_added": 150,
+      "lines_deleted": 11,
+      "binary_added": 0,
+      "binary_deleted": 0,
+      "first_commit": "2026-10-03T16:31:40Z",
+      "last_commit": "2026-10-05T03:53:26Z"
+    },
+    {
+      "login": "CameronGilroy",
+      "people_entry": false,
+      "github_name": null,
+      "prs": 1,
+      "commits": 18,
+      "lines_added": 5236,
+      "lines_deleted": 381,
+      "binary_added": 0,
+      "binary_deleted": 0,
+      "first_commit": "2026-10-05T06:15:59Z",
+      "last_commit": "2026-10-05T18:56:22Z"
+    },
+    {
+      "login": "midasdf",
+      "people_entry": false,
+      "github_name": null,
+      "prs": 1,
+      "commits": 1,
+      "lines_added": 161,
+      "lines_deleted": 0,
+      "binary_added": 1,
+      "binary_deleted": 0,
+      "first_commit": "2026-10-05T15:01:53Z",
+      "last_commit": "2026-10-05T15:01:53Z"
+    },
+    {
+      "login": "ShaoWenbinSaleh",
+      "people_entry": false,
+      "github_name": null,
+      "prs": 1,
+      "commits": 2,
+      "lines_added": 6020,
+      "lines_deleted": 1278,
+      "binary_added": 0,
+      "binary_deleted": 0,
+      "first_commit": "2026-10-05T19:15:57Z",
+      "last_commit": "2026-10-06T14:32:13Z"
+    },
+    {
+      "login": "japbcoelho",
+      "people_entry": false,
+      "github_name": null,
+      "prs": 9,
+      "commits": 9,
+      "lines_added": 782,
+      "lines_deleted": 91,
+      "binary_added": 0,
+      "binary_deleted": 0,
+      "first_commit": "2026-10-06T01:43:44Z",
+      "last_commit": "2026-10-06T01:45:41Z"
+    }
+  ],
+  "models": [
+    {
+      "id": "anthropic/claude-opus/5.5",
+      "company": "Anthropic",
+      "model": "Claude Opus",
+      "version": "5.5",
+      "commits": 266,
+      "lines_added": 83821,
+      "lines_deleted": 6091
+    },
+    {
+      "id": "anthropic/claude-opus/4.8",
+      "company": "Anthropic",
+      "model": "Claude Opus",
+      "version": "4.8",
+      "commits": 1,
+      "lines_added": 1633,
+      "lines_deleted": 3
+    },
+    {
+      "id": "openai/codex",
+      "company": "OpenAI",
+      "model": "Codex",
+      "version": "",
+      "commits": 1,
+      "lines_added": 26,
+      "lines_deleted": 5
+    }
+  ]
+}
diff --git a/contributors/people.toml b/contributors/people.toml
new file mode 100644
index 00000000..89c6db20
--- /dev/null
+++ b/contributors/people.toml
@@ -0,0 +1,23 @@
+# Contributor names for the About window (craftrules standards/contributors.md).
+#
+# Everyone who contributes is credited by GitHub username automatically. Anything more is up to
+# you: add YOUR OWN entry below, in your own PR (commit it yourself). Never add someone else; a
+# maintainer may add a person only when that person asked, recording where in consent_source.
+#
+# Easiest: python3 ../../craftrules/scripts/contributors.py --add-me . \
+#            [--real-name "Ada Lovelace"] [--display-name "Ada"] [--sync-github-name]
+#
+# Or copy this block, replacing your-github-username (every field is optional):
+#
+#   [people.your-github-username]
+#   real_name = "Your Name"        # shown when the viewer picks "Real name"
+#   display_name = "Nickname"      # shown when the viewer picks "Display name"
+#   sync_github_name = true        # or: use the name on your public GitHub profile as display name
+#
+# To remove your names, delete your entry (or set fields empty) in a PR. The next
+# contributors.py run, and the next build, drop them.
+
+[people.echelon]
+real_name = "Brandon Thomas"
+display_name = "Brandon Thomas"
+sync_github_name = false
diff --git a/crates/ui-egui/Cargo.toml b/crates/ui-egui/Cargo.toml
index a322157c..025d33fe 100644
--- a/crates/ui-egui/Cargo.toml
+++ b/crates/ui-egui/Cargo.toml
@@ -29,3 +29,7 @@ log = { workspace = true }
 [dev-dependencies]
 # Headless (offscreen wgpu) rendering of the whole window for UI screenshots: `examples/ui_shot.rs`.
 egui_kittest = { workspace = true, features = ["wgpu", "snapshot"] }
+
+[build-dependencies]
+serde_json = { workspace = true }
+toml = "1"
diff --git a/crates/ui-egui/build.rs b/crates/ui-egui/build.rs
new file mode 100644
index 00000000..f40007fb
--- /dev/null
+++ b/crates/ui-egui/build.rs
@@ -0,0 +1,105 @@
+//! Bake the contributor credits into the binary as static Rust tables (craftrules
+//! standards/contributors.md). Nothing is read at run time.
+//!
+//! - contributors/contributors.json: commit stats per GitHub username, generated by craftrules
+//!   scripts/contributors.py, which also marks whose people.toml entry it verified.
+//! - contributors/people.toml: the names people chose for themselves. A name is used only when the
+//!   JSON says the entry was verified (`people_entry`).
+//!
+//! A missing or malformed file gives empty tables (or no names) and a warning.
+
+use std::fmt::Write as _;
+
+use serde_json::Value;
+
+fn main() {
+    let dir = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("../../contributors");
+    let json = read(&dir.join("contributors.json"), "the About window shows no contributors", |t| {
+        serde_json::from_str::<Value>(t).map_err(|e| e.to_string())
+    })
+    .unwrap_or(Value::Null);
+    let people = read(&dir.join("people.toml"), "contributors are shown by username only", |t| t.parse::<toml::Table>().map_err(|e| e.to_string()))
+        .unwrap_or_default();
+    let out = std::path::PathBuf::from(std::env::var_os("OUT_DIR").unwrap_or_default()).join("credits.rs");
+    if let Err(e) = std::fs::write(&out, generate(&json, &people)) {
+        println!("cargo::warning=writing {}: {e}", out.display());
+    }
+}
+
+fn read<T>(path: &std::path::Path, fallback: &str, parse: impl Fn(&str) -> Result<T, String>) -> Option<T> {
+    println!("cargo::rerun-if-changed={}", path.display());
+    let r = std::fs::read_to_string(path).map_err(|e| e.to_string()).and_then(|t| parse(&t));
+    if let Err(e) = &r {
+        println!("cargo::warning={}: {e}; {fallback}", path.display());
+    }
+    r.ok()
+}
+
+/// A non-empty string field of someone's people.toml entry, as a Rust `Option<&str>` literal.
+fn name(v: Option<&str>) -> String {
+    match v.map(str::trim).filter(|s| !s.is_empty()) {
+        Some(x) => format!("Some({x:?})"),
+        None => "None".into(),
+    }
+}
+
+fn s(v: &Value, k: &str) -> String {
+    format!("{:?}", v.get(k).and_then(Value::as_str).unwrap_or(""))
+}
+
+fn n(v: &Value, k: &str) -> u64 {
+    v.get(k).and_then(Value::as_u64).unwrap_or(0)
+}
+
+fn rows(json: &Value, k: &str) -> Vec<Value> {
+    json.get(k).and_then(Value::as_array).cloned().unwrap_or_default()
+}
+
+fn generate(json: &Value, people: &toml::Table) -> String {
+    let mut o = String::new();
+    let _ = writeln!(o, "pub static TOTAL_COMMITS: u64 = {};", n(json, "commits"));
+    let _ = writeln!(o, "pub static CONTRIBUTORS: &[Contributor] = &[");
+    for c in rows(json, "contributors") {
+        let login = c.get("login").and_then(Value::as_str).unwrap_or("");
+        if login.is_empty() {
+            continue;
+        }
+        // Names only from a verified, self-chosen people.toml entry.
+        let entry = people.get("people").and_then(|p| p.get(login)).filter(|_| c.get("people_entry").and_then(Value::as_bool) == Some(true));
+        let field = |k: &str| entry.and_then(|e| e.get(k)).and_then(toml::Value::as_str);
+        let synced = entry.and_then(|e| e.get("sync_github_name")).and_then(toml::Value::as_bool) == Some(true);
+        let display = field("display_name")
+            .filter(|s| !s.trim().is_empty())
+            .or_else(|| if synced { c.get("github_name").and_then(Value::as_str) } else { None });
+        let _ = writeln!(
+            o,
+            "    Contributor {{ login: {login:?}, display_name: {}, real_name: {}, prs: {}, commits: {}, lines_added: {}, lines_deleted: {}, binary_added: {}, binary_deleted: {}, first_commit: {}, last_commit: {} }},",
+            name(display),
+            name(field("real_name")),
+            n(&c, "prs"),
+            n(&c, "commits"),
+            n(&c, "lines_added"),
+            n(&c, "lines_deleted"),
+            n(&c, "binary_added"),
+            n(&c, "binary_deleted"),
+            s(&c, "first_commit"),
+            s(&c, "last_commit"),
+        );
+    }
+    let _ = writeln!(o, "];");
+    let _ = writeln!(o, "pub static MODELS: &[Model] = &[");
+    for m in rows(json, "models") {
+        let _ = writeln!(
+            o,
+            "    Model {{ company: {}, model: {}, version: {}, commits: {}, lines_added: {}, lines_deleted: {} }},",
+            s(&m, "company"),
+            s(&m, "model"),
+            s(&m, "version"),
+            n(&m, "commits"),
+            n(&m, "lines_added"),
+            n(&m, "lines_deleted"),
+        );
+    }
+    let _ = writeln!(o, "];");
+    o
+}
diff --git a/crates/ui-egui/src/about.rs b/crates/ui-egui/src/about.rs
index d08a1eb6..a3875609 100644
--- a/crates/ui-egui/src/about.rs
+++ b/crates/ui-egui/src/about.rs
@@ -1,5 +1,6 @@
-//! Help › About DesignCraft: the splash with the ArtCraft mark, version, and community links
-//! (Discord first and largest), plus the other ArtCraft apps.
+//! Help › About DesignCraft: tabs About · Contributors · Models. About is the splash with the
+//! ArtCraft mark, version, and community links (Discord first and largest), plus the other ArtCraft
+//! apps; Contributors and Models are the compiled-in credits (`crate::credits`).
 
 use designcraft_engine::links;
 use egui::{Color32, Rect, Sense, Stroke, pos2, vec2};
@@ -26,6 +27,9 @@ pub const SIBLINGS: &[(&str, &str, &str)] = &[
     ("effectcraft", "EffectCraft", "motion graphics and visual effects"),
 ];
 
+/// The About window's tabs, in `UiState::about_tab` order (`help.about {tab}` names them in lowercase).
+pub const ABOUT_TABS: [&str; 3] = ["About", "Contributors", "Models"];
+
 /// Paint the ArtCraft mark into `rect` (square), rasterised once per size and cached.
 pub fn paint_mark(ui: &egui::Ui, rect: Rect, color: Color32) {
     use designcraft_render::vello_cpu::{self, kurbo, peniko};
@@ -103,7 +107,34 @@ pub fn show(app: &mut DesignApp, ctx: &egui::Context) {
     let t = Tokens::get(ctx);
     let mut open: Option<&'static str> = None;
     let resp = egui::Modal::new(egui::Id::new("about")).show(ctx, |ui| {
-        ui.set_width(460.0);
+        ui.set_width(if app.ui.about_tab == 0 { 460.0 } else { 640.0 });
+        ui.horizontal(|ui| {
+            for (i, l) in ABOUT_TABS.iter().enumerate() {
+                let i = i as u8;
+                if ui.selectable_label(app.ui.about_tab == i, crate::rtl::widget(ui, crate::i18n::tr(&app.ui.language, l))).clicked() {
+                    app.ui.about_tab = i;
+                }
+            }
+        });
+        ui.separator();
+        if app.ui.about_tab != 0 {
+            let h = 400.0_f32.min(ctx.content_rect().height() * 0.7).max(160.0);
+            ui.allocate_ui_with_layout(vec2(ui.available_width(), h), egui::Layout::top_down(egui::Align::Min), |ui| {
+                ui.set_min_height(h);
+                if app.ui.about_tab == 1 {
+                    crate::credits::contributors_ui(ui);
+                } else {
+                    crate::credits::models_ui(ui);
+                }
+            });
+            ui.separator();
+            ui.vertical_centered(|ui| {
+                if ui.button(crate::rtl::widget(ui, crate::i18n::tr(&app.ui.language, "  Close  "))).clicked() {
+                    app.ui.about = false;
+                }
+            });
+            return;
+        }
         ui.vertical_centered(|ui| {
             ui.add_space(8.0);
             let (r, _) = ui.allocate_exact_size(vec2(72.0, 72.0), Sense::hover());
diff --git a/crates/ui-egui/src/credits.rs b/crates/ui-egui/src/credits.rs
new file mode 100644
index 00000000..765dec19
--- /dev/null
+++ b/crates/ui-egui/src/credits.rs
@@ -0,0 +1,399 @@
+//! The About window's credits: every contributor (GitHub login always; display and real names only
+//! with recorded consent) and the AI models that helped. The tables are baked into the binary by
+//! build.rs from contributors/contributors.json (craftrules standards/contributors.md); nothing is
+//! read at run time.
+
+use std::cmp::Ordering;
+
+use egui::RichText;
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct Contributor {
+    pub login: &'static str,
+    pub display_name: Option<&'static str>,
+    pub real_name: Option<&'static str>,
+    pub prs: u64,
+    pub commits: u64,
+    pub lines_added: u64,
+    pub lines_deleted: u64,
+    pub binary_added: u64,
+    pub binary_deleted: u64,
+    /// ISO 8601 UTC; empty for someone credited only through a merged PR.
+    pub first_commit: &'static str,
+    pub last_commit: &'static str,
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct Model {
+    pub company: &'static str,
+    pub model: &'static str,
+    pub version: &'static str,
+    pub commits: u64,
+    pub lines_added: u64,
+    pub lines_deleted: u64,
+}
+
+include!(concat!(env!("OUT_DIR"), "/credits.rs"));
+
+/// Which name to show. Display and real names fall back to the `@username` when not given.
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+pub enum NameMode {
+    #[default]
+    Username,
+    DisplayName,
+    RealName,
+}
+
+impl NameMode {
+    pub const ALL: [NameMode; 3] = [NameMode::Username, NameMode::DisplayName, NameMode::RealName];
+
+    pub fn label(self) -> &'static str {
+        match self {
+            NameMode::Username => "Username",
+            NameMode::DisplayName => "Display name",
+            NameMode::RealName => "Real name",
+        }
+    }
+}
+
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+pub enum SortKey {
+    Name,
+    Prs,
+    Commits,
+    LinesAdded,
+    LinesDeleted,
+    LinesDelta,
+    BinaryAdded,
+    BinaryDeleted,
+    #[default]
+    FirstCommit,
+    LastCommit,
+}
+
+impl SortKey {
+    pub const ALL: [SortKey; 10] = [
+        SortKey::Name,
+        SortKey::Prs,
+        SortKey::Commits,
+        SortKey::LinesAdded,
+        SortKey::LinesDeleted,
+        SortKey::LinesDelta,
+        SortKey::BinaryAdded,
+        SortKey::BinaryDeleted,
+        SortKey::FirstCommit,
+        SortKey::LastCommit,
+    ];
+
+    /// Menu label and table header.
+    pub fn label(self) -> (&'static str, &'static str) {
+        match self {
+            SortKey::Name => ("Name (A–Z)", "Name"),
+            SortKey::Prs => ("Merged PRs", "PRs"),
+            SortKey::Commits => ("Commits", "Commits"),
+            SortKey::LinesAdded => ("Lines added", "+LOC"),
+            SortKey::LinesDeleted => ("Lines deleted", "−LOC"),
+            SortKey::LinesDelta => ("Line delta", "ΔLOC"),
+            SortKey::BinaryAdded => ("Binary assets added", "+Bin"),
+            SortKey::BinaryDeleted => ("Binary assets removed", "−Bin"),
+            SortKey::FirstCommit => ("First commit", "First"),
+            SortKey::LastCommit => ("Last commit", "Last"),
+        }
+    }
+
+    /// Names and dates read naturally oldest/A first; counts read biggest first.
+    pub fn default_ascending(self) -> bool {
+        matches!(self, SortKey::Name | SortKey::FirstCommit | SortKey::LastCommit)
+    }
+}
+
+impl Contributor {
+    pub fn name(&self, mode: NameMode) -> String {
+        let chosen = match mode {
+            NameMode::Username => None,
+            NameMode::DisplayName => self.display_name,
+            NameMode::RealName => self.real_name,
+        };
+        chosen.map_or_else(|| format!("@{}", self.login), str::to_string)
+    }
+
+    pub fn lines_delta(&self) -> i128 {
+        i128::from(self.lines_added) - i128::from(self.lines_deleted)
+    }
+
+    /// One line with everything we know, for tooltips.
+    pub fn summary(&self) -> String {
+        format!(
+            "@{}: {} PRs, {} commits, +{} / −{} lines (Δ {}), +{} / −{} binary assets, {} – {}",
+            self.login,
+            self.prs,
+            self.commits,
+            group(self.lines_added),
+            group(self.lines_deleted),
+            signed(self.lines_delta()),
+            self.binary_added,
+            self.binary_deleted,
+            day(self.first_commit),
+            day(self.last_commit),
+        )
+    }
+}
+
+/// Alphabetical key: case-insensitive, ignoring the `@` of usernames.
+fn name_key(name: &str) -> String {
+    name.trim_start_matches('@').to_lowercase()
+}
+
+fn compare(a: &Contributor, b: &Contributor, mode: NameMode, key: SortKey) -> Ordering {
+    match key {
+        SortKey::Name => name_key(&a.name(mode)).cmp(&name_key(&b.name(mode))),
+        SortKey::Prs => a.prs.cmp(&b.prs),
+        SortKey::Commits => a.commits.cmp(&b.commits),
+        SortKey::LinesAdded => a.lines_added.cmp(&b.lines_added),
+        SortKey::LinesDeleted => a.lines_deleted.cmp(&b.lines_deleted),
+        SortKey::LinesDelta => a.lines_delta().cmp(&b.lines_delta()),
+        SortKey::BinaryAdded => a.binary_added.cmp(&b.binary_added),
+        SortKey::BinaryDeleted => a.binary_deleted.cmp(&b.binary_deleted),
+        // A PR-only contributor (no commit date) sorts after everyone with a date.
+        SortKey::FirstCommit => dated(a.first_commit).cmp(&dated(b.first_commit)),
+        SortKey::LastCommit => dated(a.last_commit).cmp(&dated(b.last_commit)),
+    }
+}
+
+fn dated(d: &str) -> (bool, &str) {
+    (d.is_empty(), d)
+}
+
+/// Contributors in display order. Ties fall back to the name (A–Z) so the order is stable.
+pub fn sorted(list: &[Contributor], mode: NameMode, key: SortKey, ascending: bool) -> Vec<&Contributor> {
+    let mut v: Vec<&Contributor> = list.iter().collect();
+    v.sort_by(|a, b| {
+        let o = compare(a, b, mode, key);
+        let o = if ascending { o } else { o.reverse() };
+        o.then_with(|| compare(a, b, mode, SortKey::Name)).then_with(|| a.login.cmp(b.login))
+    });
+    v
+}
+
+fn group(n: u64) -> String {
+    let s = n.to_string();
+    let mut out = String::with_capacity(s.len() + s.len() / 3);
+    for (i, ch) in s.chars().enumerate() {
+        if i > 0 && (s.len() - i).is_multiple_of(3) {
+            out.push(',');
+        }
+        out.push(ch);
+    }
+    out
+}
+
+fn signed(n: i128) -> String {
+    let g = group(u64::try_from(n.unsigned_abs()).unwrap_or(u64::MAX));
+    if n < 0 { format!("−{g}") } else { format!("+{g}") }
+}
+
+fn day(iso: &str) -> &str {
+    if iso.is_empty() { "—" } else { iso.get(..10).unwrap_or(iso) }
+}
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+struct View {
+    names: NameMode,
+    key: SortKey,
+    ascending: bool,
+    table: bool,
+}
+
+impl Default for View {
+    fn default() -> Self {
+        View { names: NameMode::Username, key: SortKey::FirstCommit, ascending: true, table: false }
+    }
+}
+
+/// About ▸ Contributors: a name toggle, a sort, and the list as a grab bag or a table.
+pub fn contributors_ui(ui: &mut egui::Ui) {
+    let id = egui::Id::new("credits_view");
+    let mut v = ui.data_mut(|d| d.get_temp::<View>(id)).unwrap_or_default();
+    ui.horizontal_wrapped(|ui| {
+        ui.label("Show");
+        for m in NameMode::ALL {
+            if ui.selectable_label(v.names == m, m.label()).clicked() {
+                v.names = m;
+            }
+        }
+        ui.separator();
+        ui.label("Sort");
+        egui::ComboBox::from_id_salt("credits_sort").selected_text(v.key.label().0).show_ui(ui, |ui| {
+            for k in SortKey::ALL {
+                if ui.selectable_label(v.key == k, k.label().0).clicked() {
+                    v.key = k;
+                    v.ascending = k.default_ascending();
+                }
+            }
+        });
+        if ui.button(if v.ascending { "▲" } else { "▼" }).on_hover_text("Reverse the order").clicked() {
+            v.ascending = !v.ascending;
+        }
+        ui.separator();
+        if ui.selectable_label(!v.table, "Grab bag").clicked() {
+            v.table = false;
+        }
+        if ui.selectable_label(v.table, "Table").clicked() {
+            v.table = true;
+        }
+    });
+    let list = sorted(CONTRIBUTORS, v.names, v.key, v.ascending);
+    ui.label(RichText::new(format!("{} contributors · {} commits", list.len(), group(TOTAL_COMMITS))).small().weak());
+    ui.separator();
+    egui::ScrollArea::both().auto_shrink([false, false]).show(ui, |ui| {
+        if list.is_empty() {
+            ui.label("No contributor data was built into this copy.");
+        } else if v.table {
+            table(ui, &list, &mut v);
+        } else {
+            ui.horizontal_wrapped(|ui| {
+                for (i, c) in list.iter().enumerate() {
+                    if i > 0 {
+                        ui.label(RichText::new("·").weak());
+                    }
+                    ui.hyperlink_to(c.name(v.names), format!("https://github.com/{}", c.login)).on_hover_text(c.summary());
+                }
+            });
+        }
+    });
+    ui.data_mut(|d| d.insert_temp(id, v));
+}
+
+fn table(ui: &mut egui::Ui, list: &[&Contributor], v: &mut View) {
+    egui::Grid::new("credits_table").striped(true).num_columns(SortKey::ALL.len()).show(ui, |ui| {
+        for k in SortKey::ALL {
+            let arrow = if v.key == k { if v.ascending { " ▲" } else { " ▼" } } else { "" };
+            if ui.button(RichText::new(format!("{}{arrow}", k.label().1)).strong()).on_hover_text(k.label().0).clicked() {
+                if v.key == k {
+                    v.ascending = !v.ascending;
+                } else {
+                    v.key = k;
+                    v.ascending = k.default_ascending();
+                }
+            }
+        }
+        ui.end_row();
+        for c in list {
+            ui.hyperlink_to(c.name(v.names), format!("https://github.com/{}", c.login)).on_hover_text(c.summary());
+            ui.label(group(c.prs));
+            ui.label(group(c.commits));
+            ui.label(group(c.lines_added));
+            ui.label(group(c.lines_deleted));
+            ui.label(signed(c.lines_delta()));
+            ui.label(group(c.binary_added));
+            ui.label(group(c.binary_deleted));
+            ui.label(day(c.first_commit));
+            ui.label(day(c.last_commit));
+            ui.end_row();
+        }
+    });
+}
+
+/// About ▸ Models: AI models credited in Co-Authored-By trailers.
+pub fn models_ui(ui: &mut egui::Ui) {
+    if MODELS.is_empty() {
+        ui.label("No model credits were built into this copy.");
+        return;
+    }
+    let assisted: u64 = MODELS.iter().map(|m| m.commits).max().unwrap_or(0).max(1);
+    egui::ScrollArea::both().auto_shrink([false, false]).show(ui, |ui| {
+        egui::Grid::new("credits_models").striped(true).num_columns(6).show(ui, |ui| {
+            for h in ["Company", "Model", "Version", "Commits", "% of all commits", "Lines +/−"] {
+                ui.label(RichText::new(h).strong());
+            }
+            ui.end_row();
+            for m in MODELS {
+                ui.label(m.company);
+                ui.label(m.model);
+                ui.label(m.version);
+                ui.label(group(m.commits));
+                ui.label(format!("{:.0}%", 100.0 * m.commits as f64 / TOTAL_COMMITS.max(assisted) as f64));
+                ui.label(format!("+{} / −{}", group(m.lines_added), group(m.lines_deleted)));
+                ui.end_row();
+            }
+        });
+    });
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn c(
+        login: &'static str,
+        display: Option<&'static str>,
+        real: Option<&'static str>,
+        added: u64,
+        deleted: u64,
+        first: &'static str,
+    ) -> Contributor {
+        Contributor {
+            login,
+            display_name: display,
+            real_name: real,
+            prs: 0,
+            commits: 1,
+            lines_added: added,
+            lines_deleted: deleted,
+            binary_added: 0,
+            binary_deleted: 0,
+            first_commit: first,
+            last_commit: first,
+        }
+    }
+
+    fn people() -> [Contributor; 4] {
+        [
+            c("zed", None, None, 5, 50, "2026-01-02T00:00:00Z"),
+            c("Bob", Some("Ann"), None, 10, 0, "2026-01-01T00:00:00Z"),
+            c("alice", None, None, 7, 1, ""),
+            c("carol", None, Some("Dana"), 1, 0, "2026-01-03T00:00:00Z"),
+        ]
+    }
+
+    fn logins(v: &[&Contributor]) -> Vec<&'static str> {
+        v.iter().map(|c| c.login).collect()
+    }
+
+    #[test]
+    fn names_fall_back_to_the_username() {
+        let p = c("bob", Some("Bobby"), None, 0, 0, "");
+        assert_eq!(p.name(NameMode::Username), "@bob");
+        assert_eq!(p.name(NameMode::DisplayName), "Bobby");
+        assert_eq!(p.name(NameMode::RealName), "@bob");
+    }
+
+    #[test]
+    fn alphabetical_ignores_at_and_case() {
+        let all = people();
+        let v = sorted(&all, NameMode::Username, SortKey::Name, true);
+        assert_eq!(logins(&v), ["alice", "Bob", "carol", "zed"]);
+        let v = sorted(&all, NameMode::DisplayName, SortKey::Name, true);
+        assert_eq!(logins(&v), ["alice", "Bob", "carol", "zed"]); // "Ann" sorts with the @usernames
+        let v = sorted(&all, NameMode::RealName, SortKey::Name, false);
+        assert_eq!(logins(&v), ["zed", "carol", "Bob", "alice"]); // "Dana" between bob and zed
+    }
+
+    #[test]
+    fn delta_and_dates() {
+        let all = people();
+        let v = sorted(&all, NameMode::Username, SortKey::LinesDelta, false);
+        assert_eq!(logins(&v), ["Bob", "alice", "carol", "zed"]);
+        let v = sorted(&all, NameMode::Username, SortKey::FirstCommit, true);
+        assert_eq!(logins(&v), ["Bob", "zed", "carol", "alice"]); // undated last
+    }
+
+    #[test]
+    fn formatting() {
+        assert_eq!(group(1234567), "1,234,567");
+        assert_eq!(group(12), "12");
+        assert_eq!(signed(-1000), "−1,000");
+        assert_eq!(day("2026-10-07T18:45:23Z"), "2026-10-07");
+        assert_eq!(day(""), "—");
+    }
+}
diff --git a/crates/ui-egui/src/lib.rs b/crates/ui-egui/src/lib.rs
index 10a60008..7b474fa2 100644
--- a/crates/ui-egui/src/lib.rs
+++ b/crates/ui-egui/src/lib.rs
@@ -10,6 +10,7 @@ pub mod about;
 pub mod canvas;
 pub mod chrome;
 pub mod control;
+pub mod credits;
 pub mod dialogs;
 pub mod dock;
 pub mod i18n;
@@ -190,6 +191,9 @@ pub struct UiState {
     pub task_bar: bool,
     /// Help › About DesignCraft is open.
     pub about: bool,
+    /// The About window's tab: 0 About, 1 Contributors, 2 Models (`about::ABOUT_TABS`).
+    #[serde(skip)]
+    pub about_tab: u8,
     /// URLs to open in the browser on the next frame (Help links, About, start screen).
     pub pending_urls: Vec<String>,
     #[serde(skip)]
@@ -261,6 +265,7 @@ impl Default for UiState {
             snap_zone: 4.0,
             task_bar: true,
             about: false,
+            about_tab: 0,
             pending_urls: Vec::new(),
             status: String::new(),
             dialog: None,
diff --git a/crates/ui-egui/src/menus.rs b/crates/ui-egui/src/menus.rs
index c7b9f192..2d46c034 100644
--- a/crates/ui-egui/src/menus.rs
+++ b/crates/ui-egui/src/menus.rs
@@ -135,7 +135,12 @@ pub const UI_COMMANDS: &[(&str, &str, Option<&str>, &str)] = &[
     ("help.issues", "Report an Issue…", None, "{} — opens the GitHub issue tracker"),
     ("help.website", "ArtCraft Website…", None, "{} — opens https://getartcraft.com"),
     ("help.app", "ArtCraft App Page…", None, "{app} — opens https://getartcraft.com/apps/{app} (e.g. photocraft)"),
-    ("help.about", "About DesignCraft", None, "{open?: true} — the About splash with community links (open: false closes it)"),
+    (
+        "help.about",
+        "About DesignCraft",
+        None,
+        "{open?: true, tab?: \"about\"|\"contributors\"|\"models\"} — the About window: splash with community links, contributor and model credits (open: false closes it)",
+    ),
     ("window.toolsDoubleColumn", "Tools: Double Column", None, "{}"),
     (
         "window.workspace",
@@ -1278,6 +1283,12 @@ pub fn run_ui(app: &mut DesignApp, id: &str, p: &Value) -> Option<Result<Value,
         }
         "window.taskBar" => flag(&mut app.ui.task_bar),
         "help.about" => {
+            if let Some(tab) = p.get("tab").and_then(Value::as_str) {
+                let Some(i) = crate::about::ABOUT_TABS.iter().position(|t| t.eq_ignore_ascii_case(tab)) else {
+                    return Some(Err(format!("help.about: unknown tab `{tab}` (about, contributors, models)")));
+                };
+                app.ui.about_tab = u8::try_from(i).unwrap_or(0);
+            }
             app.ui.about = p.get("open").and_then(Value::as_bool).unwrap_or(true);
             Ok(json!(app.ui.about))
         }
diff --git a/docs/contributors.md b/docs/contributors.md
new file mode 100644
index 00000000..410a9409
--- /dev/null
+++ b/docs/contributors.md
@@ -0,0 +1,55 @@
+# Contributors in the About window
+
+**About ▸ Contributors** credits everyone who contributed to DesignCraft, and **About ▸ Models** credits
+the AI models named in `Co-Authored-By` trailers. This follows the shared craftrules standard
+[`standards/contributors.md`](https://github.com/storytold/craftrules/blob/main/standards/contributors.md);
+this page is the local copy of the decision.
+
+## Decision
+
+- Two files, both **compiled into the binary** by the UI crate's `build.rs` (nothing is read from
+  disk or the network at run time; the web build has them too):
+  - [`contributors/contributors.json`](../contributors/contributors.json): commit stats per GitHub
+    username. **Generated** by `craftrules/scripts/contributors.py`; never hand-edit.
+  - [`contributors/people.toml`](../contributors/people.toml): the names people chose for
+    themselves. **Each contributor adds only their own entry**, in their own PR.
+- Each contributor gets one line: GitHub username (always), display name (opt-in, or their synced
+  GitHub profile name), real name (only if they told us), merged PRs, commits, lines added, lines
+  deleted, binary assets added, binary assets removed, first and last commit date.
+- The list is shown as a **grab bag** (names flowing as text) or a **table**, in the same order. It
+  sorts by name, PRs, commits, lines added, lines deleted, line delta, binary assets added/removed,
+  first or last commit date. The name toggle cycles **Username → Display name → Real name**; a
+  missing name falls back to `@username`. Alphabetical sorting is case-insensitive and ignores the `@`.
+
+## In DesignCraft
+
+- The About window is `crates/ui-egui/src/about.rs` (Help ▸ About DesignCraft); `help.about {"tab":"contributors"}` opens a tab.
+
+## Credit yourself
+
+Add your entry to `contributors/people.toml` in a PR you commit yourself (every field optional):
+
+```toml
+[people.your-github-username]
+real_name = "Your Name"
+display_name = "Nickname"
+sync_github_name = true   # use the name on your public GitHub profile as display name
+```
+
+or, with craftrules checked out next to `craft-apps/`:
+
+```sh
+python3 ../../craftrules/scripts/contributors.py --add-me . --real-name "Your Name" --sync-github-name
+```
+
+Names show after the next refresh: the script checks that each entry was committed by its own
+user (or by a maintainer with a `consent_source`). Delete your entry to remove your names.
+
+## Refreshing (maintainers)
+
+```sh
+python3 ../../craftrules/scripts/contributors.py .           # regenerate + verify; needs git, Python 3.11+, gh
+python3 ../../craftrules/scripts/contributors.py --check .   # verify people.toml only
+```
+
+Commit the updated `contributors/contributors.json`. Git author names and emails are never recorded.
diff --git a/docs/mcp.md b/docs/mcp.md
index 228fc4eb..2181fef9 100644
--- a/docs/mcp.md
+++ b/docs/mcp.md
@@ -93,4 +93,4 @@ key        {"key": "Escape"}
 
 ## Community links
 
-`app.links` returns the ArtCraft Discord (https://discord.gg/artcraft), the website (https://getartcraft.com), DesignCraft's app page (https://getartcraft.com/apps/designcraft), its GitHub repository (https://github.com/storytold/designcraft) and the issue tracker. In the running app, the UI commands `help.discord`, `help.appPage`, `help.github`, `help.issues`, `help.website`, `help.app {app}` open them in the browser and `help.about` shows the About splash. The server's `serverInfo.websiteUrl` is the app page.
+`app.links` returns the ArtCraft Discord (https://discord.gg/artcraft), the website (https://getartcraft.com), DesignCraft's app page (https://getartcraft.com/apps/designcraft), its GitHub repository (https://github.com/storytold/designcraft) and the issue tracker. In the running app, the UI commands `help.discord`, `help.appPage`, `help.github`, `help.issues`, `help.website`, `help.app {app}` open them in the browser and `help.about {tab?}` shows the About window (tabs `about`, `contributors`, `models`). The server's `serverInfo.websiteUrl` is the app page.