docs: standardize heading case in documentation (#13051)

* docs: standardize heading case in documentation

* docs: fix

Author: chenjiahan

AGENTS.md

@@ -1,10 +1,10 @@
 # Rspack
 
-## Project Overview
+## Project overview
 
 Rspack is a high-performance JavaScript bundler written in Rust that offers strong compatibility with the webpack ecosystem.
 
-## Project Architecture
+## Project architecture
 
 - **Monorepo** with Rust crates (`crates/`) and JavaScript packages (`packages/`)
 - See [Project Architecture](website/docs/en/contribute/development/project.md) for details
@@ -44,16 +44,16 @@ Depends on what you have modified, you need to rebuild by `pnpm run build:js` or
 - **JavaScript**: Use `--inspect` flag, attach with `Attach JavaScript`
 - **rust-lldb**: `rust-lldb -- node /path/to/rspack build` for panic debugging
 
-## Code Quality
+## Code quality
 
 - **Linting**: `pnpm run lint:js` (Biome), `pnpm run lint:rs` (cargo check), `pnpm run lint:type` (Rslint)
 - **Formatting**: `pnpm run format:rs` (cargo fmt), `pnpm run format:js` (prettier), `pnpm run format:toml` (taplo)
 - **Rust gate**: After modifying Rust code, ensure both `cargo fmt --all --check` and `cargo lint` pass before commit/PR
 - **Style**: snake_case for Rust, camelCase for JS/TS
 
-## Common Tasks
+## Common tasks
 
-### Adding a New Feature
+### Adding a new feature
 
 1. Create feature branch from `main`
 2. Implement in appropriate crate/package
@@ -63,17 +63,17 @@ Depends on what you have modified, you need to rebuild by `pnpm run build:js` or
 6. Format: `pnpm run format:rs && pnpm run format:js`
 7. Create PR
 
-### Modifying Code
+### Modifying code
 
 - **Rust**: Core in `crates/rspack_core/`, plugins in `crates/rspack_plugin_*/`, rebuild with `pnpm run build:binding:dev`, test with `pnpm run test:rs`, and ensure `cargo fmt --all --check && cargo lint` passes
 - **JS/TS**: API in `packages/rspack/src/`, CLI in `packages/rspack-cli/src/`, rebuild with `pnpm run build:js`, test with `pnpm run test:unit`
 
-### Adding Tests
+### Adding tests
 
 - **Rust**: Add `#[test]` functions in same file or `tests/` directory
 - **JavaScript**: Add cases in `tests/rspack-test/{type}Cases/` (Normal, Config, Hot, Watch, StatsOutput, StatsAPI, Diagnostic, Hash, Compiler, Defaults, Error, Hook, TreeShaking, Builtin)
 
-## Dependency Management
+## Dependency management
 
 - **Package manager**: pnpm (workspaces for monorepo)
 - **Rust**: `Cargo.toml` in each crate
@@ -93,7 +93,7 @@ Depends on what you have modified, you need to rebuild by `pnpm run build:js` or
 - **API**: `website/docs/en/api/`
 - **Extract API**: `pnpm run api-extractor:local`
 
-## Pull Request Guidelines
+## Pull request guidelines
 
 - **Template**: Use `.github/PULL_REQUEST_TEMPLATE.md`
 - **Title prefix**: `test:`, `fix:`, `feat:`, `refactor:`, `chore:`
@@ -113,15 +113,15 @@ Depends on what you have modified, you need to rebuild by `pnpm run build:js` or
 - Prefer these types for release impact: `fix`, `feat`; use `!` or `BREAKING CHANGE:` only for incompatible changes
 - Keep PRs focused (one feature/fix per PR)
 
-## Finding Code
+## Finding code
 
 - **Rust core**: `crates/rspack_core/`
 - **Plugins**: `crates/rspack_plugin_*/`
 - **JavaScript API**: `packages/rspack/src/`
 - **CLI**: `packages/rspack-cli/src/`
 - **Tests**: `tests/rspack-test/`
 
-## Error Handling
+## Error handling
 
 - Use `rspack_error` crate for Rust errors
 - Provide clear, actionable error messages

crates/rspack_binding_api/README.md

@@ -13,7 +13,7 @@ Shared binding API for Rspack, providing bridge interfaces between Rspack core f
 - `plugin`: Enable SWC plugin support
 - `sftrace-setup`: Enable performance tracing setup
 
-## Important Notice
+## Important notice
 
 ⚠️ **Version Compatibility Warning**
 
@@ -23,13 +23,13 @@ Shared binding API for Rspack, providing bridge interfaces between Rspack core f
 - It is recommended to lock specific version numbers in production environments
 - Please thoroughly test all functionality before upgrading
 
-## API Usage Warning
+## API usage warning
 
 🚨 **This package's API should NOT be used as a public Rust API**
 
 This crate is designed to be linked as a **C dynamic library** during Rspack binding generation, not as a public Rust API for external consumption.
 
-### For Developers
+### For developers
 
 If you're working on Rspack itself:
 

crates/rspack_tools/README.md

@@ -4,7 +4,7 @@ A toolkit for debugging and testing rspack internals.
 
 ## Commands
 
-### `compare` - Compare Cache In Directories
+### `compare` - Compare cache in directories
 
 Compare the cache content of two directories to verify they contain identical data.
 

package.json

@@ -26,8 +26,8 @@
     "build:cli:release:browser": "pnpm --filter @rspack/binding build:release:browser && pnpm run build:js",
     "test:js": "pnpm -r run test",
     "format:rs": "cargo fmt --all",
-    "format:js": "prettier . --write",
-    "format-ci:js": "prettier . --check",
+    "format:js": "prettier . --write && heading-case --write",
+    "format-ci:js": "prettier . --check && heading-case",
     "format-ci:toml": "taplo format --check",
     "format:toml": "taplo format",
     "lint:js": "pnpm run lint-ci:js --write",
@@ -73,6 +73,7 @@
     "check-dependency-version-consistency": "^5.0.1",
     "commander": "14.0.3",
     "cross-env": "^10.1.0",
+    "heading-case": "^1.0.7",
     "husky": "^9.1.7",
     "is-ci": "4.1.0",
     "lint-staged": "^16.2.7",

packages/rspack-test-tools/README.md

@@ -8,7 +8,7 @@
 
 Test tools for rspack.
 
-## Wasm Tests
+## Wasm tests
 
 We expect to reuse the tests for Rspack wasm target as many as possible and we have managed to do it partially. Currently wasm tests should be run with an environment variable `WASM=1` under the following limitations:
 

pnpm-lock.yaml

@@ -1,4 +1,4 @@
-# Cross-Origin Lazy Compilation Test
+# Cross-Origin lazy compilation test
 
 This test verifies that lazy compilation works correctly
 when the lazy compilation server runs on a different origin (port) than the frontend dev server.
@@ -38,7 +38,7 @@ when the lazy compilation server runs on a different origin (port) than the fron
 +----------------------+             |                                 |
 ```
 
-## Key Points
+## Key points
 
 1. **Two Separate Servers**: Frontend runs on port 8500, lazy compilation on port 8600
 2. **Cross-Origin Request**: Browser sends POST request to a different origin

tests/e2e/cases/lazy-compilation/cross-origin/README.md

@@ -115,7 +115,7 @@ URL placeholders expose information about the current request URL.
 | -------- | ----------- |
 | `[url]`  | URL value   |
 
-## Hash Length
+## Hash length
 
 Hash placeholders (`[hash]`, `[contenthash]`, `[chunkhash]`) support length modifiers using `[hash:n]`, where the default length is 16.
 
@@ -153,7 +153,7 @@ Entry chunks and chunks produced by [optimization.splitChunks](/plugins/webpack/
 
 :::
 
-## Escaping Placeholders
+## Escaping placeholders
 
 If you want to preserve the literal placeholder text instead of having Rspack interpolate it, escape the brackets with backslashes.
 

website/docs/en/config/filename-placeholders.mdx

@@ -4,7 +4,7 @@ import WebpackLicense from '@components/WebpackLicense';
 
 <WebpackLicense from="https://webpack.docschina.org/configuration/module/" />
 
-# Module Rules
+# Module rules
 
 - **Type:** `(Rule | Falsy)[]`
 - **Default:** `[]`