chore: cargo workspace skeleton

Eleven empty crates per DESIGN.md §11, versions and lints pinned once in the
root manifest, Justfile carrying the §12 gate, nix dev shell.

The frontend steps in `just ci` no-op until web/ exists. arr-core carries one
placeholder test because `cargo nextest` fails a zero-test run, and relaxing
that would let a broken filter go green later.

Closes #1

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

crates/arr-api/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-api"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-api/src/lib.rs

@@ -0,0 +1 @@
+//! arr-api — see DESIGN.md.

crates/arr-compat/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-compat"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-compat/src/lib.rs

@@ -0,0 +1 @@
+//! arr-compat — see DESIGN.md.

crates/arr-core/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-core"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-core/src/lib.rs

@@ -0,0 +1,14 @@
+//! arr-core — domain types, policy engine, scoring. See DESIGN.md §4 and §5.
+//!
+//! This crate must never depend on `axum`, `sqlx` or `reqwest`. It holds the
+//! logic that is tested constantly and it has to stay fast to compile.
+
+#[cfg(test)]
+mod tests {
+    /// Placeholder so the test gate is meaningful on an empty workspace —
+    /// `cargo nextest` fails a run with zero tests, and relaxing that would
+    /// let a broken filter go green later. Replaced by real tests in the
+    /// domain-types and policy-engine issues.
+    #[test]
+    fn workspace_builds_and_tests_run() {}
+}

crates/arr-daemon/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "arr-daemon"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[[bin]]
+name = "arr"
+path = "src/main.rs"
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-daemon/src/main.rs

@@ -0,0 +1,5 @@
+//! arr — reconcile loop and process entry point. See DESIGN.md §8.
+
+fn main() {
+    println!("arr");
+}

crates/arr-db/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-db"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-db/src/lib.rs

@@ -0,0 +1 @@
+//! arr-db — see DESIGN.md.

crates/arr-dl/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-dl"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-dl/src/lib.rs

@@ -0,0 +1 @@
+//! arr-dl — see DESIGN.md.

crates/arr-e2e/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-e2e"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-e2e/src/lib.rs

@@ -0,0 +1 @@
+//! arr-e2e — see DESIGN.md.

crates/arr-indexer/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-indexer"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-indexer/src/lib.rs

@@ -0,0 +1 @@
+//! arr-indexer — see DESIGN.md.

crates/arr-meta/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-meta"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-meta/src/lib.rs

@@ -0,0 +1 @@
+//! arr-meta — see DESIGN.md.

crates/arr-parse/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-parse"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-parse/src/lib.rs

@@ -0,0 +1 @@
+//! arr-parse — see DESIGN.md.

crates/arr-probe/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "arr-probe"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+publish = false
+
+[dependencies]
+
+[lints]
+workspace = true

crates/arr-probe/src/lib.rs

@@ -0,0 +1 @@
+//! arr-probe — see DESIGN.md.