feat: implement FParkan architecture foundation

Add the modular fparkan workspace, domain crates, adapters, apps, xtask policy/CI, acceptance evidence, and licensed corpus gates for the macOS-focused roadmap foundation.

2 files changed, 337 insertions, 0 deletions

diff --git a/apps/fparkan-game/Cargo.toml b/apps/fparkan-game/Cargo.toml
new file mode 100644
index 0000000..eef4d81
--- /dev/null
+++ b/apps/fparkan-game/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "fparkan-game"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+fparkan-render = { path = "../../crates/fparkan-render" }
+fparkan-runtime = { path = "../../crates/fparkan-runtime" }
+fparkan-vfs = { path = "../../crates/fparkan-vfs" }
+fparkan-world = { path = "../../crates/fparkan-world" }
+
+[lints]
+workspace = true
diff --git a/apps/fparkan-game/src/main.rs b/apps/fparkan-game/src/main.rs
new file mode 100644
index 0000000..ed12c70
--- /dev/null
+++ b/apps/fparkan-game/src/main.rs
@@ -0,0 +1,322 @@
+#![forbid(unsafe_code)]
+#![allow(clippy::print_stderr, clippy::print_stdout)]
+//! `FParkan` rendered game composition root.
+
+use fparkan_render::{
+    DrawCommand, DrawId, GpuMaterialId, GpuMeshId, IndexRange, RecordingBackend, RenderBackend,
+    RenderCommand, RenderCommandList, RenderPhase,
+};
+use fparkan_runtime::{
+    create, frame, load_mission, EngineConfig, EngineMode, EngineServices, MissionRequest,
+};
+use fparkan_vfs::DirectoryVfs;
+use fparkan_world::WorldSnapshot;
+use std::path::PathBuf;
+use std::sync::Arc;
+
+fn main() {
+    let raw_args = std::env::args().skip(1).collect::<Vec<_>>();
+    let code = match run(&raw_args) {
+        Ok(output) => {
+            println!("{output}");
+            0
+        }
+        Err(err) => {
+            eprintln!("{err}");
+            2
+        }
+    };
+    std::process::exit(code);
+}
+
+fn run(args: &[String]) -> Result<String, String> {
+    let args = Args::parse(args)?;
+    let services = EngineServices::new(Arc::new(DirectoryVfs::new(&args.root)));
+    let mut engine = create(
+        EngineConfig {
+            mode: EngineMode::Rendered,
+        },
+        services,
+    )
+    .map_err(|err| err.to_string())?;
+    let loaded = load_mission(
+        &mut engine,
+        MissionRequest {
+            key: args.mission.clone(),
+        },
+    )
+    .map_err(|err| err.to_string())?;
+
+    let mut backend = RecordingBackend::default();
+    let mut last_draw_count = 0usize;
+    let mut last_tick = 0u64;
+    let mut last_hash = [0u8; 32];
+    for _ in 0..args.frames {
+        let result = frame(&mut engine).map_err(|err| err.to_string())?;
+        last_tick = result.snapshot.tick.0;
+        last_hash = result.snapshot.hash.0;
+        let commands = render_snapshot_commands(&result.snapshot);
+        last_draw_count = commands
+            .commands
+            .iter()
+            .filter(|command| matches!(command, RenderCommand::Draw(_)))
+            .count();
+        backend
+            .execute(&commands)
+            .map_err(|err| format!("render backend: {err}"))?;
+    }
+
+    Ok(format!(
+        "{{\"mission\":{},\"objects\":{},\"frames\":{},\"tick\":{},\"draws\":{},\"captures\":{},\"last_capture_bytes\":{},\"hash\":{}}}",
+        json_string(&args.mission),
+        loaded.object_count,
+        args.frames,
+        last_tick,
+        last_draw_count,
+        backend.captures().len(),
+        backend.last_capture().map_or(0, <[u8]>::len),
+        json_hash(&last_hash)
+    ))
+}
+
+fn render_snapshot_commands(snapshot: &WorldSnapshot) -> RenderCommandList {
+    let mut commands = Vec::with_capacity(snapshot.objects.len() + 2);
+    commands.push(RenderCommand::BeginFrame);
+    for (index, handle) in snapshot.objects.iter().enumerate() {
+        let stable_order = u64::from(handle.slot);
+        let draw_id = snapshot
+            .tick
+            .0
+            .wrapping_mul(1_000_003)
+            .wrapping_add(stable_order);
+        commands.push(RenderCommand::Draw(DrawCommand {
+            id: DrawId(draw_id),
+            phase: RenderPhase::Opaque,
+            object_id: None,
+            mesh: GpuMeshId(u64::from(handle.slot) + 1),
+            material: GpuMaterialId(1),
+            transform: identity_transform(index_to_f32(index)),
+            range: IndexRange { start: 0, count: 3 },
+            stable_order,
+        }));
+    }
+    commands.push(RenderCommand::EndFrame);
+    RenderCommandList { commands }
+}
+
+fn identity_transform(x: f32) -> [f32; 16] {
+    [
+        1.0, 0.0, 0.0, x, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0,
+    ]
+}
+
+fn index_to_f32(index: usize) -> f32 {
+    u16::try_from(index).map_or(f32::from(u16::MAX), f32::from)
+}
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+struct Args {
+    root: PathBuf,
+    mission: String,
+    frames: u64,
+}
+
+impl Args {
+    fn parse(args: &[String]) -> Result<Self, String> {
+        let mut root = None;
+        let mut mission = None;
+        let mut frames = 1;
+        let mut iter = args.iter();
+        while let Some(arg) = iter.next() {
+            match arg.as_str() {
+                "--root" => {
+                    root = Some(
+                        iter.next()
+                            .map(PathBuf::from)
+                            .ok_or_else(|| "--root requires a path".to_string())?,
+                    );
+                }
+                "--mission" => {
+                    mission = Some(
+                        iter.next()
+                            .cloned()
+                            .ok_or_else(|| "--mission requires a path".to_string())?,
+                    );
+                }
+                "--frames" => {
+                    frames = iter
+                        .next()
+                        .ok_or_else(|| "--frames requires a value".to_string())?
+                        .parse()
+                        .map_err(|_| "--frames must be an integer".to_string())?;
+                }
+                _ => return Err(usage()),
+            }
+        }
+        let root = root.ok_or_else(|| "missing --root".to_string())?;
+        let mission = mission.ok_or_else(|| "missing --mission".to_string())?;
+        if frames == 0 {
+            return Err("--frames must be greater than zero".to_string());
+        }
+        Ok(Self {
+            root,
+            mission,
+            frames,
+        })
+    }
+}
+
+fn json_string(value: &str) -> String {
+    let mut out = String::with_capacity(value.len() + 2);
+    out.push('"');
+    for ch in value.chars() {
+        match ch {
+            '"' => out.push_str("\\\""),
+            '\\' => out.push_str("\\\\"),
+            '\n' => out.push_str("\\n"),
+            '\r' => out.push_str("\\r"),
+            '\t' => out.push_str("\\t"),
+            c if c.is_control() => {
+                use std::fmt::Write as _;
+                let _ = write!(out, "\\u{:04x}", u32::from(c));
+            }
+            c => out.push(c),
+        }
+    }
+    out.push('"');
+    out
+}
+
+fn json_hash(hash: &[u8; 32]) -> String {
+    let mut out = String::from("\"");
+    for byte in hash {
+        use std::fmt::Write as _;
+        let _ = write!(out, "{byte:02x}");
+    }
+    out.push('"');
+    out
+}
+
+fn usage() -> String {
+    "usage: fparkan-game --root <path> --mission <path> [--frames <n>]".to_string()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use fparkan_world::{ObjectHandle, StateHash, Tick};
+    use std::path::Path;
+
+    fn strings(values: &[&str]) -> Vec<String> {
+        values.iter().map(|value| (*value).to_string()).collect()
+    }
+
+    #[test]
+    fn parses_required_args() {
+        assert_eq!(
+            Args::parse(&strings(&[
+                "--root",
+                "testdata/IS",
+                "--mission",
+                "MISSIONS/Autodemo.00/data.tma",
+                "--frames",
+                "3",
+            ])),
+            Ok(Args {
+                root: PathBuf::from("testdata/IS"),
+                mission: "MISSIONS/Autodemo.00/data.tma".to_string(),
+                frames: 3,
+            })
+        );
+    }
+
+    #[test]
+    fn render_commands_follow_snapshot_order() -> Result<(), String> {
+        let snapshot = WorldSnapshot {
+            tick: Tick(7),
+            objects: vec![
+                ObjectHandle {
+                    generation: 1,
+                    slot: 2,
+                },
+                ObjectHandle {
+                    generation: 1,
+                    slot: 5,
+                },
+            ],
+            events: Vec::new(),
+            hash: StateHash([0; 32]),
+        };
+
+        let commands = render_snapshot_commands(&snapshot);
+
+        assert_eq!(commands.commands.len(), 4);
+        assert!(matches!(commands.commands[0], RenderCommand::BeginFrame));
+        assert!(matches!(commands.commands[3], RenderCommand::EndFrame));
+        let RenderCommand::Draw(first) = &commands.commands[1] else {
+            return Err("expected draw".to_string());
+        };
+        assert_eq!(first.mesh, GpuMeshId(3));
+        assert_eq!(first.stable_order, 2);
+        Ok(())
+    }
+
+    #[test]
+    fn selected_is_and_is2_missions_produce_approved_render_captures() {
+        for case in [
+            RenderCase {
+                root: "IS",
+                mission: "MISSIONS/CAMPAIGN/CAMPAIGN.00/Mission.01/data.tma",
+                expected: "{\"mission\":\"MISSIONS/CAMPAIGN/CAMPAIGN.00/Mission.01/data.tma\",\"objects\":33,\"frames\":1,\"tick\":1,\"draws\":33,\"captures\":1,\"last_capture_bytes\":810,\"hash\":\"8584c4307bc911fc82bf909018662f392f3982bf909018666298bde408fe4242\"}",
+            },
+            RenderCase {
+                root: "IS2",
+                mission: "MISSIONS/Campaign/CAMPAIGN.00/Mission.02/data.tma",
+                expected: "{\"mission\":\"MISSIONS/Campaign/CAMPAIGN.00/Mission.02/data.tma\",\"objects\":10,\"frames\":1,\"tick\":1,\"draws\":10,\"captures\":1,\"last_capture_bytes\":235,\"hash\":\"c52267cb14f699cb73b958e46c99c23ec23e73b958e46c99b3650afbcce56291\"}",
+            },
+        ] {
+            assert_eq!(
+                run(&render_args(&workspace_root().join("testdata").join(case.root), case.mission)),
+                Ok(case.expected.to_string())
+            );
+        }
+    }
+
+    #[test]
+    fn json_hash_is_hex() {
+        let mut hash = [0; 32];
+        hash[0] = 0xab;
+        hash[31] = 0xcd;
+
+        assert_eq!(
+            json_hash(&hash),
+            "\"ab000000000000000000000000000000000000000000000000000000000000cd\""
+        );
+    }
+
+    #[derive(Clone, Copy)]
+    struct RenderCase {
+        root: &'static str,
+        mission: &'static str,
+        expected: &'static str,
+    }
+
+    fn render_args(root: &Path, mission: &str) -> Vec<String> {
+        vec![
+            "--root".to_string(),
+            root.to_str().expect("utf8 root").to_string(),
+            "--mission".to_string(),
+            mission.to_string(),
+            "--frames".to_string(),
+            "1".to_string(),
+        ]
+    }
+
+    fn workspace_root() -> PathBuf {
+        PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .parent()
+            .and_then(Path::parent)
+            .expect("workspace root")
+            .to_path_buf()
+    }
+}