feat: add Rust Dylint rules

.github/workflows/ci.yml

@@ -43,3 +43,19 @@ jobs:
 
       - name: Pack dry run
         run: bun run pack:dry-run
+
+  rust-lints:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+
+      - name: Install Rust lint toolchain
+        run: |
+          rustup toolchain install nightly-2026-04-16 --profile minimal \
+            --component rustc-dev \
+            --component llvm-tools-preview
+          cargo install dylint-link --version 6.0.1 --locked
+
+      - name: Test Rust lints
+        run: cd rust-lints/stella_lints && cargo test

README.md

@@ -12,6 +12,7 @@ This repo intentionally contains only portable tooling policy:
 - `@stll/oxlint-config`: general upstream oxlint rules and the shared
   `stella-lowercase` and `no-raw-colors` JS plugins.
 - `rust/`: source-of-truth Rust formatting, lint, and Cargo profile templates.
+- `rust-lints/`: Dylint libraries for stella-specific Rust rules.
 
 Repo-specific stella rules stay in the consuming repo: custom oxlint plugins,
 security rules, i18n rules, generated native artifacts, benchmark exceptions,
@@ -94,9 +95,18 @@ Use the Rust templates by copying them into a Rust repository:
 ```bash
 cp rust/rustfmt.toml /path/to/repo/rustfmt.toml
 cp rust/clippy.toml /path/to/repo/clippy.toml
+cp rust/dylint.toml /path/to/repo/dylint.toml
 ```
 
 Then copy either `rust/cargo-root.toml` or `rust/cargo-workspace.toml` into the
 repository's root `Cargo.toml`. Cargo does not support extending these settings
 from another package, so the templates are kept here as the canonical source and
 synced into consumers.
+
+Pin the `rev` in `dylint.toml` to the exact tooling commit being adopted. Then
+run Clippy first and Dylint second:
+
+```bash
+cargo clippy --workspace --all-targets --all-features -- -D warnings
+cargo dylint --workspace --all -- --all-targets --all-features -- -D warnings
+```

package.json

@@ -10,6 +10,7 @@
     "build": "bun --filter @stll/oxlint-config build",
     "typecheck": "bun --filter @stll/oxlint-config typecheck",
     "test": "bun test",
+    "test:rust-lints": "cd rust-lints/stella_lints && cargo test",
     "lint": "bun run build && bun --bun oxlint -c oxlint.config.ts --report-unused-disable-directives-severity=error --deny-warnings --type-aware .",
     "lint:fix": "bun --bun oxlint -c oxlint.config.ts --type-aware --fix .",
     "format": "oxfmt . \"!.ai/**\" \"!.agents/**\" \"!.claude/**\" \"!AGENTS.md\" \"!CLAUDE.md\" \"!GEMINI.md\"",

rust-lints/README.md

@@ -0,0 +1,34 @@
+# stella Rust lints
+
+Custom Dylint libraries for stella Rust repositories.
+
+These rules are the Rust equivalent of shared custom oxlint rules: they enforce
+stella-specific policy that Clippy cannot know about.
+
+## Libraries
+
+- `stella_lints`: shared Rust house rules.
+
+## Current Rules
+
+- `stella_lowercase`: flags string literals containing `Stella`; use lowercase
+  `stella` in public docs, diagnostics, and logs.
+
+## Consumer Setup
+
+Install the Dylint runner:
+
+```bash
+cargo install cargo-dylint dylint-link
+```
+
+Copy `rust/dylint.toml` to the consuming repository root, pin the
+`stella/tooling` `rev`, then run:
+
+```bash
+cargo clippy --workspace --all-targets --all-features -- -D warnings
+cargo dylint --workspace --all
+```
+
+Keep repo-specific exceptions narrow and local. If a rule is broadly wrong,
+fix it here instead of suppressing it in every consuming repository.

rust-lints/stella_lints/.cargo/config.toml

@@ -0,0 +1,6 @@
+[target.'cfg(all())']
+rustflags = ["-C", "linker=dylint-link"]
+
+# For Rust versions 1.74.0 and onward, the following alternative can be used
+# (see https://github.com/rust-lang/cargo/pull/12535):
+# linker = "dylint-link"

rust-lints/stella_lints/.gitignore

@@ -0,0 +1 @@
+/target