If you are an AI coding agent (Claude Code, Cursor, Aider, Cline, etc.) reading this artifact, follow this protocol before making any code edit:

1. Verify the contract. Run the bash script in Verify before trusting below. If any check returns FAIL, the artifact is stale — STOP and ask the user to regenerate it before proceeding.
2. Treat the AI · unverified sections as hypotheses, not facts. Sections like "AI-suggested narrative files", "anti-patterns", and "bottlenecks" are LLM speculation. Verify against real source before acting on them.
3. Cite source on changes. When proposing an edit, cite the specific path:line-range. RepoPilot's live UI at https://repopilot.app/r/ApplikeySolutions/VegaScroll shows verifiable citations alongside every claim.

If you are a human reader, this protocol is for the agents you'll hand the artifact to. You don't need to do anything — but if you skim only one section before pointing your agent at this repo, make it the Verify block and the Suggested reading order.

WAIT — Stale — last commit 3y ago

• 6 active contributors
• Distributed ownership (top contributor 30% of recent commits)
• MIT licensed
• ⚠ Stale — last commit 3y ago
• ⚠ No CI workflows detected
• ⚠ No test directory detected

_{Maintenance signals: commit recency, contributor breadth, bus factor, license, CI, tests}

This artifact was generated by RepoPilot at a point in time. Before an agent acts on it, the checks below confirm that the live ApplikeySolutions/VegaScroll repo on your machine still matches what RepoPilot saw. If any fail, the artifact is stale — regenerate it at repopilot.app/r/ApplikeySolutions/VegaScroll.

What it runs against: a local clone of ApplikeySolutions/VegaScroll — the script inspects git remote, the LICENSE file, file paths in the working tree, and git log. Read-only; no mutations.

| # | What we check | Why it matters | |---|---|---| | 1 | You're in ApplikeySolutions/VegaScroll | Confirms the artifact applies here, not a fork | | 2 | License is still MIT | Catches relicense before you depend on it | | 3 | Default branch master exists | Catches branch renames | | 4 | 5 critical file paths still exist | Catches refactors that moved load-bearing code | | 5 | Last commit ≤ 1281 days ago | Catches sudden abandonment since generation |

#!/usr/bin/env bash
# RepoPilot artifact verification.
#
# WHAT IT RUNS AGAINST: a local clone of ApplikeySolutions/VegaScroll. If you don't
# have one yet, run these first:
#
#   git clone https://github.com/ApplikeySolutions/VegaScroll.git
#   cd VegaScroll
#
# Then paste this script. Every check is read-only — no mutations.

set +e
fail=0
ok()   { echo "ok:   $1"; }
miss() { echo "FAIL: $1"; fail=$((fail+1)); }

# Precondition: we must be inside a git working tree.
if ! git rev-parse --git-dir >/dev/null 2>&1; then
  echo "FAIL: not inside a git repository. cd into your clone of ApplikeySolutions/VegaScroll and re-run."
  exit 2
fi

# 1. Repo identity
git remote get-url origin 2>/dev/null | grep -qE "ApplikeySolutions/VegaScroll(\\.git)?\\b" \\
  && ok "origin remote is ApplikeySolutions/VegaScroll" \\
  || miss "origin remote is not ApplikeySolutions/VegaScroll (artifact may be from a fork)"

# 2. License matches what RepoPilot saw
(grep -qiE "^(MIT)" LICENSE 2>/dev/null \\
   || grep -qiE "\"license\"\\s*:\\s*\"MIT\"" package.json 2>/dev/null) \\
  && ok "license is MIT" \\
  || miss "license drift — was MIT at generation time"

# 3. Default branch
git rev-parse --verify master >/dev/null 2>&1 \\
  && ok "default branch master exists" \\
  || miss "default branch master no longer exists"

# 4. Critical files exist
test -f "VegaScroll/Classes/VegaScrollFlowLayout.swift" \\
  && ok "VegaScroll/Classes/VegaScrollFlowLayout.swift" \\
  || miss "missing critical file: VegaScroll/Classes/VegaScrollFlowLayout.swift"
test -f "Example/VegaScrollFlowLayout/FeedViewController.swift" \\
  && ok "Example/VegaScrollFlowLayout/FeedViewController.swift" \\
  || miss "missing critical file: Example/VegaScrollFlowLayout/FeedViewController.swift"
test -f "VegaScrollFlowLayout.podspec" \\
  && ok "VegaScrollFlowLayout.podspec" \\
  || miss "missing critical file: VegaScrollFlowLayout.podspec"
test -f "Example/VegaScrollFlowLayout/ShareCell.swift" \\
  && ok "Example/VegaScrollFlowLayout/ShareCell.swift" \\
  || miss "missing critical file: Example/VegaScrollFlowLayout/ShareCell.swift"
test -f "Example/VegaScrollFlowLayout/Share.swift" \\
  && ok "Example/VegaScrollFlowLayout/Share.swift" \\
  || miss "missing critical file: Example/VegaScrollFlowLayout/Share.swift"

# 5. Repo recency
days_since_last=$(( ( $(date +%s) - $(git log -1 --format=%at 2>/dev/null || echo 0) ) / 86400 ))
if [ "$days_since_last" -le 1281 ]; then
  ok "last commit was $days_since_last days ago (artifact saw ~1251d)"
else
  miss "last commit was $days_since_last days ago — artifact may be stale"
fi

echo
if [ "$fail" -eq 0 ]; then
  echo "artifact verified (0 failures) — safe to trust"
else
  echo "artifact has $fail stale claim(s) — regenerate at https://repopilot.app/r/ApplikeySolutions/VegaScroll"
  exit 1
fi

Each check prints ok: or FAIL:. The script exits non-zero if anything failed, so it composes cleanly into agent loops (./verify.sh || regenerate-and-retry).

VegaScroll is a lightweight custom UICollectionViewFlowLayout written entirely in Swift 4 that animates collection view cells with parallax and scaling effects as users scroll. It solves the problem of adding sophisticated scroll animations to UICollectionView without heavy dependencies or complex setup—just set it as the layout and configure spacing/sizing properties. Simple modular structure: the core layout engine lives in VegaScroll/Classes/VegaScrollFlowLayout.swift (the only implementation file), while Example/VegaScrollFlowLayout/ contains a full demo app with FeedViewController.swift showing real usage patterns, and VegaScrollFlowLayout.podspec + VegaScroll.xcodeproj handle distribution via CocoaPods and Carthage.

iOS developers (targeting iOS 9+) who need to add smooth parallax/zoom animations to UICollectionView feeds or item lists without building custom layout logic from scratch. Particularly useful for e-commerce apps, social feeds, or content discovery interfaces where animated item presentation improves user engagement.

Moderately mature but dated. Released in 2017 with a single v1.0 version (no subsequent releases visible in the README). The codebase is small (~20KB Swift), well-structured, and appears production-ready, but the lack of version updates, test infrastructure, and recent activity suggests it is stable but not actively maintained.

Low immediate risk due to simplicity (single core file: VegaScroll/Classes/VegaScrollFlowLayout.swift), but long-term risk is moderate: no visible test suite, no CI/CD pipeline evident, no recent commits listed, and it's maintained by a single company (Applikey Solutions). Dependency on iOS 9+ base APIs minimizes API deprecation risk, but Swift language evolution and iOS design changes may reduce relevance over time.

No visible active development. The README lists only v1.0 release notes with no additional updates. No PR, issue, or commit activity is evident from the provided file structure. The project appears to be in maintenance mode or dormant.

Clone the repo, then open the example app: git clone https://github.com/ApplikeySolutions/VegaScroll.git && cd VegaScroll && open Example/VegaScrollFlowLayout.xcodeproj. For integration into your own project, use CocoaPods: pod 'VegaScrollFlowLayout' or Carthage: github "ApplikeySolutions/VegaScroll" in your Cartfile.

Daily commands: Open Example/VegaScrollFlowLayout.xcodeproj in Xcode 9+, select the VegaScrollFlowLayout-Example scheme, and press Cmd+R. The example demonstrates the layout applied to a simple feed with ShareCell items. Alternatively, integrate the pod into your own project and instantiate VegaScrollFlowLayout() as your collection view's collectionViewLayout.

• VegaScroll/Classes/VegaScrollFlowLayout.swift — Core layout engine that implements the animated flow layout behavior for UICollectionView; all animation and positioning logic resides here.
• Example/VegaScrollFlowLayout/FeedViewController.swift — Primary example implementation showing how to integrate VegaScrollFlowLayout with a UICollectionView and data model.
• VegaScrollFlowLayout.podspec — Pod specification defining library metadata, dependencies, and deployment targets; required for CocoaPods distribution.
• Example/VegaScrollFlowLayout/ShareCell.swift — Custom UICollectionViewCell implementation demonstrating the recommended cell design pattern for use with VegaScrollFlowLayout.
• Example/VegaScrollFlowLayout/Share.swift — Data model class used throughout the example app; defines the structure of items displayed in the collection view.
• VegaScroll/Framework/Info.plist — Framework configuration specifying iOS deployment target (11.0+) and Swift version compatibility.

• VegaScrollFlowLayout (Swift, UICollectionViewFlowLayout, CGAffineTransform, CABasicAnimation) — Custom UICollectionViewFlowLayout subclass that intercepts scroll events and applies per-item animations (scaling, rotation, opacity) based on distance from center.
  • Failure mode: If layout attributes are miscalculated, items may overlap, disappear, or animate jerkily; scroll performance degrades if calculation is too expensive per frame.
• FeedViewController (Swift, UIViewController, UICollectionView, UICollectionViewDataSource) — Host view controller that instantiates UICollectionView, configures VegaScrollFlowLayout, and implements data source/delegate to feed Share items to cells.
  • Failure mode: Crashes if data source methods return inconsistent item counts; animation stutters if cell configuration is heavy or slow.
• ShareCell (Swift, UICollectionViewCell, UILabel, UIImageView) — Custom UICollectionViewCell subclass that displays individual feed item with visual layout and animation-ready properties (shadows, borders, transforms).
  • Failure mode: Cells render incorrectly or don't animate smoothly if layout constraints conflict with layout attribute transforms; memory leaks if images are not properly released.

• User scroll gesture → VegaScrollFlowLayout — UIScrollView detects pan and passes scroll offset to layout via shouldInvalidateLayout(forBoundsChange:).
• VegaScrollFlowLayout → UICollectionView — Layout computes UICollectionViewLayoutAttributes (scale, rotation, opacity) for each visible item and returns via layoutAttributesForElements(in:).
• UICollectionView → ShareCell — Collection view applies layout attributes to cell layer (transform, alpha) and calls cell configuration method with Share data model.
• FeedViewController data source → ShareCell — ViewController provides Share objects to cells via cellForItemAt(indexPath:), populating labels, images, and other UI elements.

Customize VegaScrollFlowLayout animation parameters

1. Open VegaScroll/Classes/VegaScrollFlowLayout.swift and locate the initialization or property definitions (VegaScroll/Classes/VegaScrollFlowLayout.swift)
2. Modify layout properties such as minimumLineSpacing, itemSize, or scrollDirection to adjust collection view geometry (VegaScroll/Classes/VegaScrollFlowLayout.swift)
3. Override the layoutAttributesForElements(in:) method to fine-tune animation scaling factors and transformations applied during scroll (VegaScroll/Classes/VegaScrollFlowLayout.swift)

Add a new custom cell design to the example app

1. Create a new UICollectionViewCell subclass similar to ShareCell.swift with custom layout and animation support (Example/VegaScrollFlowLayout/ShareCell.swift)
2. Update Share.swift data model to include additional properties required by your new cell design (Example/VegaScrollFlowLayout/Share.swift)
3. Register the new cell type in FeedViewController.swift and update the cellForItemAt method to instantiate and configure your custom cell (Example/VegaScrollFlowLayout/FeedViewController.swift)

Adjust example app data source

1. Modify SharesHelper.swift to change how sample Share data is generated or fetched for the collection view (Example/VegaScrollFlowLayout/SharesHelper.swift)
2. Update FeedViewController.swift to call your modified helper methods in viewDidLoad or implement additional data loading logic (Example/VegaScrollFlowLayout/FeedViewController.swift)
3. Implement UICollectionViewDataSource methods to reflect the new data structure (Example/VegaScrollFlowLayout/FeedViewController.swift)

• UICollectionViewFlowLayout subclass — Provides native iOS integration for custom layout behavior without reimplementing the entire collection view machinery; leverages system scroll and rendering optimization.
• Swift 4 — Modern type-safe language with performance benefits over Objective-C; aligns with iOS 11+ deployment target and Xcode 9 toolchain.
• CocoaPods pod distribution — Standard package manager for iOS libraries; enables easy integration into existing projects without manual framework linking.

• Lightweight, single-file layout implementation

  • Why: Minimizes complexity and dependency footprint for a focused animation library; reduces maintenance burden.
  • Consequence: Limited extensibility for advanced use cases; developers must subclass VegaScrollFlowLayout for major customizations rather than composing behaviors.

• iOS 11+ minimum deployment

  • Why: Enables use of modern APIs and avoids supporting legacy UI frameworks; reduces code branching and testing surface.
  • Consequence: Cannot be used in projects supporting iOS 10 or earlier; narrows addressable market.

• Flow layout (vertical/horizontal scrolling) only

  • Why: Simplifies implementation and animation calculations; matches common feed-style use case demonstrated in example.
  • Consequence: Does not support grid layouts or custom scroll directions; not suitable for 2D paging or complex collection layouts.

• Does not provide data source or delegate implementations—developers must implement UICollectionViewDataSource and UICollectionViewDelegate themselves
• Does not include animation framework for item additions/deletions—only animates during scroll
• Not a drop-in replacement for all UICollectionViewFlowLayout features; may lack support for supplementary views and decoration views
• Does not handle memory caching or offscreen cell recycling beyond native UICollectionView behavior

• Tight coupling between layout animation logic and cell design: undefined

No hidden environment variables or required services detected. However: (1) The pod targets iOS 9+ per the README but is written in Swift 4—verify your Xcode version matches Swift 4 requirements (Xcode 9+); (2) The example app uses a .xib file for ShareCell (ShareCell.xib), so ensure XIB loading is not broken if you refactor; (3) No explicit constraint on minimum Swift version in VegaScrollFlowLayout.podspec—verify pod installs correctly with your Swift version; (4) The layout assumes vertical scrolling (UICollectionViewScrollDirection.vertical)—horizontal scrolling behavior is untested.

• UICollectionViewLayout subclassing — VegaScroll's entire mechanism depends on overriding layoutAttributesForElements(in:) and prepare() to inject custom animations; understanding layout lifecycle is essential to extend or debug it.
• Parallax scrolling — The core visual effect: cells move and scale at different rates relative to scroll offset, creating depth; understanding the math (offset ÷ visible bounds → scale/translate factor) is key to customizing animation intensity.
• CGAffineTransform — VegaScroll applies 2D transforms (scale, translation) to cell attributes via CGAffineTransform to achieve the animation effect; familiarity with this API is needed to modify animation behavior.
• UICollectionViewLayoutAttributes — The layout computes per-item attributes (frame, transform, alpha) during scroll; understanding what properties can be animated and how layout attributes flow to cells is essential.
• Scroll offset deltas — The animation is driven by calculating each cell's position relative to the visible scroll bounds; understanding how contentOffset maps to animation parameters is critical to the layout's behavior.

• ApplikeySolutions/GravitySlider — Sister project by the same authors offering an alternative flow layout for UICollectionView with different animation physics.
• nicklockwood/SwiftFormat — Tool relevant for maintaining Swift code style consistency in this codebase; useful for contributors to match existing formatting.
• AFNetworking/AFNetworking — The example app's SharesHelper.swift likely uses networking for the demo feed—AFNetworking is a common companion library for iOS data fetching.

To work on one of these in Claude Code or Cursor, paste: Implement the "<title>" PR idea from CLAUDE.md, working through the checklist as the task list.

Add Swift 4 compatibility tests and update deprecated APIs in VegaScrollFlowLayout.swift

The README claims Swift 4 compatibility and iOS 11 support, but the badge shows Swift 3.0.x. The main layout class (VegaScroll/Classes/VegaScrollFlowLayout.swift) likely uses deprecated UICollectionViewFlowLayout APIs. Adding unit tests that verify the layout works correctly with modern Swift/iOS versions and refactoring any deprecated method calls would increase maintainability and prevent future regressions.

• [ ] Review VegaScroll/Classes/VegaScrollFlowLayout.swift for deprecated UICollectionView APIs (e.g., deprecated initializers, layout methods)
• [ ] Create VegaScroll/Tests/VegaScrollFlowLayoutTests.swift with unit tests for: basic layout calculation, cell sizing, animation behavior, and edge cases
• [ ] Update .swift-version file to reflect actual Swift version support
• [ ] Run tests against iOS 11+ simulators to verify compatibility
• [ ] Update README.md badges to show correct Swift version (4.x)

Add GitHub Actions CI/CD workflow for automated testing and CocoaPods validation

The repo has a .podspec file but no automated validation. Adding a GitHub Actions workflow would catch breaking changes early, validate the podspec, run tests on multiple iOS versions, and ensure the example app builds correctly. This is critical for a library distributed via CocoaPods.

• [ ] Create .github/workflows/ci.yml with jobs for: Swift linting, unit tests, example app build, and pod spec lint
• [ ] Configure the workflow to run on: push to main, pull requests, and version tags
• [ ] Add pod spec validation step using pod spec lint VegaScrollFlowLayout.podspec
• [ ] Test against multiple Xcode/iOS versions (minimum iOS 11 as per requirements)
• [ ] Update README.md with CI status badge

Add comprehensive API documentation and usage examples to README.md and inline code comments

The README is incomplete (truncated at 'Contact Us' section) and lacks specific usage examples for VegaScrollFlowLayout's key features. The VegaScroll/Classes/VegaScrollFlowLayout.swift file likely has customizable properties (animation, spacing, scaling) that need documentation. Adding complete API docs with code examples would improve adoption and reduce support issues.

• [ ] Review VegaScroll/Classes/VegaScrollFlowLayout.swift and document all public properties, methods, and their expected values with inline /// comments
• [ ] Complete README.md with: full installation instructions, basic usage example (instantiating layout, setting on UICollectionView)
• [ ] Add code examples showing: custom animation parameters, cell sizing configuration, scroll direction setup
• [ ] Include a 'Customization' section documenting key properties (e.g., itemSize, minimumLineSpacing, animation duration) with before/after visuals if possible
• [ ] Add 'Troubleshooting' section referencing the Example/VegaScrollFlowLayout/FeedViewController.swift as a reference implementation

• Add unit tests for VegaScrollFlowLayout.swift covering layout attribute calculations, edge cases (empty collection, single item), and scroll offset bounds.
• Document animation parameters in code and README: add inline comments explaining the parallax scale factor and translation values, and create a 'Customization' section in README with examples of modifying animation intensity.
• Add support for horizontal scrolling (UICollectionViewScrollDirection.horizontal) by generalizing the scroll offset calculation in layoutAttributesForElements(in:) and add a demo view controller showing it.

The VegaScroll repository is a lightweight UI component library with minimal security concerns. The primary issue is the outdated Swift and iOS versions targeted, which lack modern security patches. The codebase appears to be a pure UI layout library without external network dependencies, database operations, or credential storage, significantly reducing attack surface. No hardcoded secrets, injection vulnerabilities, or infrastructure misconfigurations were detected. The main recommendations are to modernize the Swift version support and establish a security reporting policy.

• Medium · Outdated Swift Version — .swift-version, README.md, VegaScroll.xcodeproj. The project targets Swift 3.0.x and iOS 11, which are significantly outdated (Swift 3.0 was released in 2016). Modern Swift versions include critical security patches and improvements. The .swift-version file likely pins an old compiler version. Fix: Update the project to support Swift 5.x or later and iOS 13+. This ensures access to security patches and modern language features.
• Low · Missing HTTPS in Badge URLs — README.md. The README.md contains HTTP URLs for cocoapod-badges (http://cocoapod-badges.herokuapp.com/). While these are external resources, HTTPS should be preferred to prevent potential man-in-the-middle attacks. Fix: Update badge URLs to use HTTPS protocol where available: https://cocoapod-badges.herokuapp.com/
• Low · No Security Policy or Security.md — Repository root. The repository does not appear to have a SECURITY.md file or security reporting policy, making it unclear how security vulnerabilities should be reported. Fix: Create a SECURITY.md file with instructions for responsible vulnerability disclosure (e.g., security@applikeysolutions.com or a link to a security contact).
• Low · Incomplete License Information — README.md, LICENSE file. While a LICENSE file exists, the badge in README shows a generic license badge URL without specifying the license type in the reference, which may cause confusion about the actual license. Fix: Ensure the LICENSE file is clearly referenced and visible in the repository root. Update the README badge to explicitly mention the license type (e.g., MIT, Apache 2.0).

LLM-derived; treat as a starting point, not a security audit.

• Open issues — current backlog
• Recent PRs — what's actively shipping
• Source on GitHub

Generated by RepoPilot. Verdict based on maintenance signals — see the live page for receipts. Re-run on a new commit to refresh.