diff --git a/.github/scripts/apply-branch-protection.sh b/.github/scripts/apply-branch-protection.sh
index e64b466..67f1351 100755
--- a/.github/scripts/apply-branch-protection.sh
+++ b/.github/scripts/apply-branch-protection.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-# 在 GitHub 上启用 main / develop 分支保护（需仓库 admin + gh 已登录）
-# Enable GitHub branch protection for main and develop (requires admin + gh auth)
+# 在 GitHub 上启用 main / staging 分支保护（需仓库 admin + gh 已登录）
+# Enable GitHub branch protection for main and staging (requires admin + gh auth)
 #
 # 用法 / Usage:
 #   gh auth login
@@ -20,7 +20,7 @@ if ! gh auth status >/dev/null 2>&1; then
   exit 1
 fi
 
-echo "🔒 配置 main：禁止直接 push，仅允许 PR（建议 base=develop 合入后再 PR 到 main）"
+echo "🔒 配置 main：禁止直接 push，仅允许 staging PR 晋级"
 echo "   Configure main: block direct pushes; merge via PR only"
 
 gh api "repos/${REPO}/branches/main/protection" -X PUT \
@@ -31,30 +31,35 @@ gh api "repos/${REPO}/branches/main/protection" -X PUT \
   -f restrictions=null \
   -f allow_force_pushes=false \
   -f allow_deletions=false \
-  -F 'required_status_checks[contexts][]=CI / test' \
+  -F 'required_status_checks[contexts][]=CI / test (3.10)' \
+  -F 'required_status_checks[contexts][]=CI / test (3.11)' \
+  -F 'required_status_checks[contexts][]=CI / test (3.12)' \
   -F 'required_status_checks[contexts][]=CI / lint' \
-  -F 'required_status_checks[contexts][]=Branch Guard / block-direct-push-to-main' \
+  -F 'required_status_checks[contexts][]=Branch Guard / require-staging-source' \
   2>/dev/null || {
   echo "⚠️  main 保护需 classic protection 或 Rulesets 权限；若失败请在 GitHub UI 手动设置："
   echo "    Settings → Branches → Add rule for main"
   echo "    - Require a pull request before merging"
+  echo "    - Require status check: Branch Guard / require-staging-source"
   echo "    - Do not allow bypassing"
   echo "    - Restrict pushes that create files (optional)"
 }
 
 echo ""
-echo "🔒 配置 develop：禁止直接 push 到 main 的替代——develop 允许 PR 合并"
-gh api "repos/${REPO}/branches/develop/protection" -X PUT \
+echo "🔒 配置 staging：禁止直接 push，仅允许 feature/fix 分支通过 PR 合入"
+gh api "repos/${REPO}/branches/staging/protection" -X PUT \
   -f required_status_checks[strict]=false \
   -f enforce_admins=false \
   -f required_pull_request_reviews[required_approving_review_count]=0 \
   -f restrictions=null \
   -f allow_force_pushes=false \
   -f allow_deletions=false \
-  -F 'required_status_checks[contexts][]=CI / test' \
+  -F 'required_status_checks[contexts][]=CI / test (3.10)' \
+  -F 'required_status_checks[contexts][]=CI / test (3.11)' \
+  -F 'required_status_checks[contexts][]=CI / test (3.12)' \
   -F 'required_status_checks[contexts][]=CI / lint' \
   2>/dev/null || {
-  echo "⚠️  develop 保护可选；建议在 UI 为 develop 启用 Require PR（feature → develop）"
+  echo "⚠️  staging 保护可选；建议在 UI 为 staging 启用 Require PR（feature/fix → staging）"
 }
 
 echo ""
diff --git a/.github/workflows/branch-guard.yml b/.github/workflows/branch-guard.yml
index a48ec48..d4de9b2 100644
--- a/.github/workflows/branch-guard.yml
+++ b/.github/workflows/branch-guard.yml
@@ -1,18 +1,37 @@
-# 分支策略守卫：禁止直接向 main 推送非合并提交
-# Branch guard: reject direct (non-merge) pushes to main
+# 分支策略守卫：main 只能由 staging PR 晋级
+# Branch guard: main can only be promoted from staging PRs
 #
-# 说明 / Note: 本地 pre-commit 的 no-commit-to-branch 防本地误提交；
-# 本 workflow 在 push 已发生后标记 CI 失败，需配合 GitHub Branch protection 才能真正阻断。
-# Local pre-commit blocks local commits; this flags CI after push — use branch protection to block pushes.
+# 说明 / Note: push 守卫是兜底；真正阻断直接更新依赖 GitHub Rulesets。
+# Push guard is a fallback; GitHub Rulesets are what block direct updates.
 
 name: Branch Guard
 
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
+  require-staging-source:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - name: 检查 main PR 来源 / Check main PR source
+        env:
+          HEAD_REF: ${{ github.head_ref }}
+        run: |
+          set -euo pipefail
+          if [[ "${HEAD_REF}" == "staging" ]]; then
+            echo "Allowed: staging -> main"
+            exit 0
+          fi
+          echo "::error::main 只能从 staging 分支通过 PR 晋级，当前来源：${HEAD_REF}"
+          echo "::error::PRs to main must come from staging. Current source: ${HEAD_REF}"
+          exit 1
+
   block-direct-push-to-main:
+    if: github.event_name == 'push'
     runs-on: ubuntu-latest
     steps:
       - name: 检查是否为合并提交 / Check merge commit
@@ -29,6 +48,6 @@ jobs:
             echo "Allowed merge to main."
             exit 0
           fi
-          echo "::error::禁止直接向 main 推送。请先合入 develop，再通过 PR 合入 main。"
-          echo "::error::Direct push to main is not allowed. Merge to develop first, then open a PR to main."
+          echo "::error::禁止直接向 main 推送。请先合入 staging，再通过 PR 合入 main。"
+          echo "::error::Direct push to main is not allowed. Merge to staging first, then open a PR to main."
           exit 1
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d430cac..197e16d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [ main, develop ]
+    branches: [ main, staging ]
   pull_request:
-    branches: [ main, develop ]
+    branches: [ main, staging ]
 
 jobs:
   test:
@@ -93,4 +93,3 @@ jobs:
 
     - name: 运行 Black
       run: poetry run black --check ogscope tests
-
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e9fc5c1..7e37ef4 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -33,11 +33,11 @@
    cd OGScope
    ```
 
-2. **基于 develop 创建功能分支 / Branch from develop**
+2. **基于 staging 创建功能分支 / Branch from staging**
    ```bash
    git fetch origin
-   git checkout develop
-   git pull origin develop
+   git checkout staging
+   git pull origin staging
    git checkout -b feature/your-feature-name
    ```
 
@@ -125,16 +125,16 @@
 
 | 分支 | 用途 |
 |------|------|
-| `main` | 稳定发布线；仅通过 PR 从 `develop` 合入 |
-| `develop` | **唯一集成分支**；日常开发与板端联调基准 |
-| `feature/*` | 功能/重构；从 `develop` 拉出，PR 合回后删除 |
-| `fix/*` | 小修复；可合 `develop`，紧急时可 hotfix 合 `main` |
+| `main` | 稳定发布线；仅通过 PR 从 `staging` 晋级 |
+| `staging` | **长期测试集成分支**；日常开发、板端联调与社区测试基准 |
+| `feature/*` | 功能/重构；从 `staging` 拉出，PR 合回后删除 |
+| `fix/*` | 小修复；合入 `staging` 验证，紧急时可 hotfix 合 `main` |
 
-流程：`feature/*` → PR → `develop` → 定期 PR → `main`。
+流程：`feature/*` / `fix/*` → PR → `staging` → 测试通过后 PR → `main`。
 
-**禁止直接向 `main` 提交或推送**（本地 pre-commit 会拦截；remote 需配置 Branch protection，见 [.github/scripts/apply-branch-protection.sh](../.github/scripts/apply-branch-protection.sh)）。
+**禁止直接向 `main` 或 `staging` 提交或推送**（本地 pre-commit 会拦截；remote 需配置 GitHub Rulesets 或 Branch protection，见 [.github/scripts/apply-branch-protection.sh](../.github/scripts/apply-branch-protection.sh)）。
 
-**已废弃**：不再使用 `dev`、`dev-latest` 双集成分支。
+**已废弃**：不再使用 `develop`、`dev`、`dev-latest` 集成分支。
 
 ## 开发流程
 
@@ -142,7 +142,7 @@
 2. **开发**: 在本地开发和测试
 3. **提交 PR**: 创建 Pull Request
 4. **代码审查**: 等待维护者审查
-5. **合并**: 审查通过后合并到 `develop`（发版时再合 `main`）
+5. **合并**: 审查通过后合并到 `staging`，测试通过后再通过 PR 晋级 `main`
 
 ## 代码审查标准
 
@@ -168,4 +168,3 @@
 - 联系维护者
 
 感谢你的贡献！🎉
-
diff --git a/CONTRIBUTING_EN.md b/CONTRIBUTING_EN.md
index 571cd44..08f1090 100644
--- a/CONTRIBUTING_EN.md
+++ b/CONTRIBUTING_EN.md
@@ -24,7 +24,7 @@ Thank you for your interest in OGScope. We welcome contributions of all kinds.
 ### Code contributions
 
 1. **Fork** the repository and clone your fork.
-2. **Branch from `develop`**: `git checkout develop && git pull && git checkout -b feature/your-feature-name`
+2. **Branch from `staging`**: `git checkout staging && git pull && git checkout -b feature/your-feature-name`
 3. **Dev dependencies**:
    ```bash
    poetry install
@@ -80,16 +80,16 @@ Thank you for your interest in OGScope. We welcome contributions of all kinds.
 
 | Branch | Purpose |
 |--------|---------|
-| `main` | Stable release; merge from `develop` via PR only |
-| `develop` | **Single integration branch**; default for daily work and board sync |
-| `feature/*` | Features/refactors; branch from `develop`, delete after merge |
-| `fix/*` | Small fixes; merge to `develop`; hotfix to `main` when urgent |
+| `main` | Stable release; promote from `staging` via PR only |
+| `staging` | **Long-lived test integration branch**; default for daily work, board sync, and community validation |
+| `feature/*` | Features/refactors; branch from `staging`, delete after merge |
+| `fix/*` | Small fixes; validate through `staging`; hotfix to `main` when urgent |
 
-Flow: `feature/*` → PR → `develop` → periodic PR → `main`.
+Flow: `feature/*` / `fix/*` → PR → `staging` → validated PR → `main`.
 
-**Do not commit or push directly to `main`.** Local pre-commit blocks this; configure GitHub branch protection via [.github/scripts/apply-branch-protection.sh](../.github/scripts/apply-branch-protection.sh).
+**Do not commit or push directly to `main` or `staging`.** Local pre-commit blocks this; configure GitHub Rulesets or branch protection via [.github/scripts/apply-branch-protection.sh](../.github/scripts/apply-branch-protection.sh).
 
-**Deprecated**: `dev` and `dev-latest` dual integration branches.
+**Deprecated**: `develop`, `dev`, and `dev-latest` integration branches.
 
 ## Workflow
 
@@ -97,7 +97,7 @@ Flow: `feature/*` → PR → `develop` → periodic PR → `main`.
 2. Develop and test locally  
 3. Open a PR  
 4. Review  
-5. Merge into `develop` (and `main` for releases)
+5. Merge into `staging`, then promote to `main` by PR after validation
 
 ## Review expectations