chore: align review rules for code and Markdown

.coderabbit.yaml

@@ -0,0 +1,29 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json
+inheritance: true
+reviews:
+  path_instructions:
+    - path: "{**/*,**/.*,**/.*/**,.*/**/.*}"
+      instructions: |
+        Follow .editorconfig and docs/CONTRIBUTING.md for all reviewed files.
+        Ordinary code uses a 120-column margin, UTF-8 and LF. Markdown prose
+        may wrap at about 160 columns or keep complete paragraphs on one line.
+        Do not request 80- or 100-column wrapping, or apply the code margin to
+        Markdown prose. Preserve code-block formatting, links and tables.
+        Follow language-specific indentation and do not use Java star imports.

docs/CONTRIBUTING.md

@@ -9,6 +9,11 @@ The following is a contribution guide for HugeGraph:
 
 <img width="884" alt="image" src="https://user-images.githubusercontent.com/9625821/159643158-8bf72c0a-93c3-4a58-8912-7b2ab20ced1d.png">
 
+## Source formatting
+
+Follow [.editorconfig](../.editorconfig): ordinary code uses a 120-column margin, UTF-8 and LF. Java uses four spaces and no star imports.
+Markdown may wrap near 160 columns or keep complete paragraphs on one line. Keep links, tables and code blocks intact; do not force 80- or 100-column wrapping.
+
 ## 1. Preparation
 
 **Recommended**: You can use [GitHub desktop](https://desktop.github.com/) to greatly simplify the PR process.
@@ -148,6 +153,18 @@ Please click on "Details" to find the problem if any check does not pass.
 
 If there are checks not passed or changes requested, then continue to modify the code and push again.
 
+### CI runs and automatic retries
+
+PR test workflows keep only the newest run for each workflow and PR. Updating a PR
+cancels its older queued or running checks; push, release and manual runs remain independent.
+Reusable workflows inherit cancellation from their caller and do not add a competing group.
+
+Automatic retries are limited to failed jobs within the existing retry budget. After the
+retry delay, CI checks that the run is still failed and that the PR is open at the same
+head commit, or that the pushed branch still points to that commit. Obsolete runs and
+runs whose state cannot be verified are skipped. This policy applies to YAML workflows;
+GitHub-managed Copilot and automatic dependency submission runs are configured separately.
+
 ## 6. Further changes after review 
 
 If we have not passed the review, don't be discouraged. Usually a commit needs to be reviewed several times before being accepted! Please follow the review comments and make further changes.