Add backup LeetCode submission sync

Author: sushildalavi

.github/workflows/sync-leetcode.yml

@@ -0,0 +1,57 @@
+name: Sync Recent LeetCode Submissions
+
+on:
+  schedule:
+    - cron: "*/5 * * * *"
+  workflow_dispatch:
+
+concurrency:
+  group: sync-leetcode-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+
+jobs:
+  sync-leetcode:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+
+      - name: Sync recent accepted submissions from LeetCode
+        env:
+          LEETCODE_COOKIES: ${{ secrets.LEETCODE_COOKIES }}
+          LEETCODE_SESSION: ${{ secrets.LEETCODE_SESSION }}
+          LEETCODE_CSRFTOKEN: ${{ secrets.LEETCODE_CSRFTOKEN }}
+        run: python3 scripts/sync_recent_leetcode_submissions.py
+
+      - name: Refresh knowledge notes
+        run: python3 scripts/sync_problem_notes.py
+
+      - name: Generate AI note drafts
+        env:
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          OPENAI_MODEL: gpt-5-mini
+        run: python3 scripts/generate_ai_problem_notes.py
+
+      - name: Refresh README progress
+        run: python3 scripts/update_progress.py
+
+      - name: Commit generated updates
+        run: |
+          if git diff --quiet -- .leetcode README.md notes data/problem_metadata.json data/leetcode_sync_state.json; then
+            echo "No generated changes to commit."
+            exit 0
+          fi
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add .leetcode README.md notes data/problem_metadata.json data/leetcode_sync_state.json
+          git commit -m "Sync recent LeetCode submissions"
+          git push

README.md

@@ -30,9 +30,10 @@ Tracked unique problems solved across all sheets: `0 / 293`
 
 - Solve on `LeetCode`
 - Let `LeetSync` push the accepted submission into this repository
+- A backup GitHub Action can also pull recent accepted submissions directly from LeetCode when `LEETCODE_COOKIES` or `LEETCODE_SESSION` + `LEETCODE_CSRFTOKEN` are configured as repo secrets
 - The GitHub Action scans the synced solution names and refreshes the progress table in this README
 - The same workflow creates or updates per-problem notes in [`notes/problems/`](notes/problems), syncs the problem statement, and refreshes the index at [`notes/INDEX.md`](notes/INDEX.md)
-- If the repo has an `OPENAI_API_KEY` secret, the workflow also generates a draft summary, data structures list, approach, and complexity directly from your synced accepted solution
+- If the repo has an `OPENAI_API_KEY` secret, the workflow also refreshes the summary, data structures list, approach, and complexity directly from your latest synced accepted solution
 
 ## Knowledge Capture
 
@@ -49,7 +50,7 @@ Tracked unique problems solved across all sheets: `0 / 293`
   - data structures used
   - approach
   - time/space complexity
-- You can still edit the generated note manually afterward; existing non-`TODO` sections are preserved
+- The AI-generated sections are refreshed from the latest synced accepted solution
 
 To save your own approach quickly after solving, use:
 
@@ -68,3 +69,4 @@ python3 scripts/update_problem_note.py two-sum \
 - `Striver's SDE Sheet` tracking only covers the LeetCode-backed problems from the official sheet
 - If a Striver problem is not solved on LeetCode, `LeetSync` cannot sync it into this repository
 - For full note automation, add `OPENAI_API_KEY` as a repository secret in GitHub Actions
+- For backup LeetCode-side syncing without relying only on the extension, add `LEETCODE_COOKIES` as a repository secret, or add both `LEETCODE_SESSION` and `LEETCODE_CSRFTOKEN`

scripts/generate_ai_problem_notes.py

@@ -22,14 +22,6 @@
 
 OPENAI_RESPONSES_URL = "https://api.openai.com/v1/responses"
 DEFAULT_MODEL = "gpt-5-mini"
-TARGET_SECTIONS = (
-    "Problem Summary",
-    "Data Structures Used",
-    "Approach",
-    "Complexity",
-    "Revision Notes",
-)
-
 SYSTEM_INSTRUCTIONS = """
 You generate concise LeetCode study notes from a problem statement and an accepted solution.
 Return only valid JSON with this exact shape:
@@ -77,15 +69,6 @@ def extract_section_body(content: str, heading: str) -> str:
     return match.group(1).strip()
 
 
-def section_needs_update(content: str, heading: str) -> bool:
-    return "TODO" in extract_section_body(content, heading)
-
-
-def complexity_needs_update(content: str) -> bool:
-    body = extract_section_body(content, "Complexity")
-    return "TODO" in body
-
-
 def format_bullets(values: list[str], fallback: str) -> str:
     cleaned = [value.strip() for value in values if value and value.strip()]
     if not cleaned:
@@ -210,42 +193,31 @@ def build_prompt(slug: str, metadata: dict[str, Any], solution_paths: list[str])
 def apply_ai_draft(note_path: Path, draft: dict[str, Any]) -> bool:
     content = note_path.read_text()
     updated = content
-    changed = False
-
-    if section_needs_update(updated, "Problem Summary"):
-        updated = replace_section(updated, "Problem Summary", str(draft.get("summary") or "TODO"))
-        changed = True
-
-    if section_needs_update(updated, "Data Structures Used"):
-        data_structures = draft.get("data_structures")
-        body = format_bullets(data_structures if isinstance(data_structures, list) else [], "TODO")
-        updated = replace_section(updated, "Data Structures Used", body)
-        changed = True
-
-    if section_needs_update(updated, "Approach"):
-        updated = replace_section(updated, "Approach", str(draft.get("approach") or "TODO"))
-        changed = True
-
-    if complexity_needs_update(updated):
-        updated = replace_complexity(
-            updated,
-            str(draft.get("time_complexity") or "TODO"),
-            str(draft.get("space_complexity") or "TODO"),
-        )
-        changed = True
-
-    if section_needs_update(updated, "Revision Notes"):
-        revision_notes = draft.get("revision_notes")
-        body = format_bullets(
-            revision_notes if isinstance(revision_notes, list) else [],
-            "- TODO",
-        )
-        updated = replace_section(updated, "Revision Notes", body)
-        changed = True
-
-    if changed:
+    data_structures = draft.get("data_structures")
+    revision_notes = draft.get("revision_notes")
+
+    updated = replace_section(updated, "Problem Summary", str(draft.get("summary") or "TODO"))
+    updated = replace_section(
+        updated,
+        "Data Structures Used",
+        format_bullets(data_structures if isinstance(data_structures, list) else [], "TODO"),
+    )
+    updated = replace_section(updated, "Approach", str(draft.get("approach") or "TODO"))
+    updated = replace_complexity(
+        updated,
+        str(draft.get("time_complexity") or "TODO"),
+        str(draft.get("space_complexity") or "TODO"),
+    )
+    updated = replace_section(
+        updated,
+        "Revision Notes",
+        format_bullets(revision_notes if isinstance(revision_notes, list) else [], "- TODO"),
+    )
+
+    if updated != content:
         note_path.write_text(updated)
-    return changed
+        return True
+    return False
 
 
 def parse_args() -> argparse.Namespace:
@@ -287,10 +259,6 @@ def main() -> int:
         if not note_path.exists():
             continue
 
-        note_content = note_path.read_text()
-        if not any(section_needs_update(note_content, heading) for heading in TARGET_SECTIONS if heading != "Complexity") and not complexity_needs_update(note_content):
-            continue
-
         metadata = get_problem_metadata(slug, cache)
         prompt = build_prompt(slug, metadata, solution_paths)