Update stale PR handling logic in workflow

.github/workflows/stale_pr_close.yml

@@ -3,7 +3,7 @@ on:
   schedule:
     - cron: "0 0 * * *"
   workflow_dispatch:
-  pull_request_target:  # Changed from pull_request
+  pull_request_target:
     types:
       - labeled
 
@@ -15,7 +15,7 @@ jobs:
       issues: write
       contents: read
     steps:
-      - name: Handle stale label
+      - name: Handle stale PRs
         uses: actions/github-script@v7
         with:
           script: |
@@ -23,7 +23,7 @@ jobs:
             const owner = context.repo.owner;
             const repo = context.repo.repo;
             
-            // --- PR labeled event ---
+            // --- When stale label is added, comment immediately ---
             if (context.eventName === "pull_request_target" && context.payload.action === "labeled") {
               const label = context.payload.label?.name;
               if (label === "stale") {
@@ -37,7 +37,7 @@ jobs:
               return;
             }
             
-            // --- Scheduled run ---
+            // --- Scheduled run: check all stale PRs ---
             const { data: prs } = await github.rest.pulls.list({
               owner,
               repo,
@@ -49,6 +49,25 @@ jobs:
               const hasStale = pr.labels.some(l => l.name === "stale");
               if (!hasStale) continue;
               
+              // Get timeline events to find when stale label was added
+              const { data: events } = await github.rest.issues.listEvents({
+                owner,
+                repo,
+                issue_number: pr.number,
+                per_page: 100
+              });
+              
+              // Find the most recent time the stale label was added
+              const staleLabelEvents = events
+                .filter(e => e.event === "labeled" && e.label?.name === "stale")
+                .sort((a, b) => new Date(b.created_at) - new Date(a.created_at));
+              
+              if (staleLabelEvents.length === 0) continue;
+              
+              const staleLabelDate = new Date(staleLabelEvents[0].created_at);
+              const daysSinceStale = (now - staleLabelDate) / (1000 * 60 * 60 * 24);
+              
+              // Check for new commits since stale label was added
               const { data: commits } = await github.rest.pulls.listCommits({
                 owner,
                 repo,
@@ -56,22 +75,9 @@ jobs:
               });
               
               const lastCommitDate = new Date(commits[commits.length - 1].commit.author.date);
-              const diffDays = (now - lastCommitDate) / (1000 * 60 * 60 * 24);
               
-              if (diffDays > 7) {
-                await github.rest.pulls.update({
-                  owner,
-                  repo,
-                  pull_number: pr.number,
-                  state: "closed"
-                });
-                await github.rest.issues.createComment({
-                  owner,
-                  repo,
-                  issue_number: pr.number,
-                  body: "Closing stale PR due to inactivity."
-                });
-              } else if (diffDays <= 7) {
+              // If there are new commits after the stale label, remove it
+              if (lastCommitDate > staleLabelDate) {
                 await github.rest.issues.removeLabel({
                   owner,
                   repo,
@@ -85,4 +91,19 @@ jobs:
                   body: "Recent activity detected. Removing stale label."
                 });
               }
+              // If 7 days have passed since stale label, close the PR
+              else if (daysSinceStale > 7) {
+                await github.rest.pulls.update({
+                  owner,
+                  repo,
+                  pull_number: pr.number,
+                  state: "closed"
+                });
+                await github.rest.issues.createComment({
+                  owner,
+                  repo,
+                  issue_number: pr.number,
+                  body: "Closing stale PR due to inactivity (no commits for 7 days after stale label)."
+                });
+              }
             }