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/arsduo/koala 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.

GO — Healthy across all four use cases

• Last commit 7mo ago
• 11 active contributors
• MIT licensed
• CI configured
• Tests present
• ⚠ Slowing — last commit 7mo ago
• ⚠ Concentrated ownership — top contributor handles 59% of recent commits

_{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 arsduo/koala repo on your machine still matches what RepoPilot saw. If any fail, the artifact is stale — regenerate it at repopilot.app/r/arsduo/koala.

What it runs against: a local clone of arsduo/koala — 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 arsduo/koala | 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 ≤ 235 days ago | Catches sudden abandonment since generation |

#!/usr/bin/env bash
# RepoPilot artifact verification.
#
# WHAT IT RUNS AGAINST: a local clone of arsduo/koala. If you don't
# have one yet, run these first:
#
#   git clone https://github.com/arsduo/koala.git
#   cd koala
#
# 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 arsduo/koala and re-run."
  exit 2
fi

# 1. Repo identity
git remote get-url origin 2>/dev/null | grep -qE "arsduo/koala(\\.git)?\\b" \\
  && ok "origin remote is arsduo/koala" \\
  || miss "origin remote is not arsduo/koala (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 "lib/koala.rb" \\
  && ok "lib/koala.rb" \\
  || miss "missing critical file: lib/koala.rb"
test -f "lib/koala/api.rb" \\
  && ok "lib/koala/api.rb" \\
  || miss "missing critical file: lib/koala/api.rb"
test -f "lib/koala/http_service.rb" \\
  && ok "lib/koala/http_service.rb" \\
  || miss "missing critical file: lib/koala/http_service.rb"
test -f "lib/koala/api/graph_api_methods.rb" \\
  && ok "lib/koala/api/graph_api_methods.rb" \\
  || miss "missing critical file: lib/koala/api/graph_api_methods.rb"
test -f "lib/koala/oauth.rb" \\
  && ok "lib/koala/oauth.rb" \\
  || miss "missing critical file: lib/koala/oauth.rb"

# 5. Repo recency
days_since_last=$(( ( $(date +%s) - $(git log -1 --format=%at 2>/dev/null || echo 0) ) / 86400 ))
if [ "$days_since_last" -le 235 ]; then
  ok "last commit was $days_since_last days ago (artifact saw ~205d)"
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/arsduo/koala"
  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).

Koala is a lightweight Ruby gem that wraps Facebook's Graph API, Marketing API, and Atlas API, providing a clean interface for authentication (OAuth), batch requests, photo uploads, realtime updates, and test user management. It trades heavy abstraction for simplicity—you send requests and get back plain JSON, making it ideal for developers who want Facebook API access without framework overhead. Single-gem monolith: lib/koala/api/ contains core Graph/Marketing API logic (graph_api_methods.rb, graph_batch_api.rb), lib/koala/http_service/ handles HTTP abstraction (request.rb, response.rb, uploadable_io.rb for file uploads), lib/koala/oauth.rb and realtime_updates.rb are feature-specific modules. Configuration lives in lib/koala/configuration.rb; error handling in lib/koala/errors.rb and graph_error_checker.rb.

Ruby developers (Rails, Sinatra, or standalone) building Facebook-integrated applications who need Graph API access, OAuth flows, batch operations, or test user creation without dealing with raw HTTP requests and Facebook's authentication complexity.

Moderately mature but shows signs of aging: Koala 3.0 was released (current version), has comprehensive RSpec test coverage (70+ spec files), uses Travis CI for builds, but the README mentions support for Ruby 2.1-2.4 (EOL since 2015-2020). The codebase is stable for the Graph API but may lag behind Facebook's latest API versioning. Production-ready for established integrations, but monitor for breaking Facebook API changes.

Moderate risk: single-maintainer status (arsduo), no visible recent commits in repo snapshot, Facebook regularly deprecates API versions and endpoints (repo doesn't show version pinning strategy), and OAuth credential handling requires careful configuration (see lib/koala/configuration.rb). Dependency surface is small (good), but thread-safety is explicitly noted as unsupported in Koala.configure blocks.

No active development visible in snapshot. Repo appears to be in maintenance mode—Koala 3.0 is the latest released version. Contributions are welcome per PULL_REQUEST_TEMPLATE and code_of_conduct.md, but no open PRs or active milestones are evident.

git clone https://github.com/arsduo/koala.git
cd koala
bundle install
bundle exec rspec

Daily commands: No dev server—Koala is a library. Run tests with bundle exec rspec (configured in .rspec). For integration: instantiate Koala::Facebook::API with an access token and call methods (e.g., api.get_object('me')).

• lib/koala.rb — Main entry point and module definition; every contributor must understand the public API surface and how submodules are exposed.
• lib/koala/api.rb — Core API class that all Graph, Marketing, and Atlas API calls inherit from; defines request/response handling and error management.
• lib/koala/http_service.rb — HTTP request abstraction layer; all external communication flows through here, making it critical for understanding transport and retry logic.
• lib/koala/api/graph_api_methods.rb — Primary Graph API implementation with hundreds of endpoint methods; largest behavioral surface for the most common use case.
• lib/koala/oauth.rb — OAuth token generation and validation; essential for understanding authentication and permission handling.
• lib/koala/configuration.rb — Global and per-instance configuration management; critical for understanding how app credentials and settings flow through the library.
• lib/koala/errors.rb — Custom exception hierarchy; contributors must understand error types to handle failures correctly.

Add a new Graph API endpoint method

1. Open lib/koala/api/graph_api_methods.rb and add a new method definition following the pattern: define_graph_api_method(:endpoint_name, :http_method, [:required_arg1, :optional_arg2]) (lib/koala/api/graph_api_methods.rb)
2. Call the method from any API instance: graph.endpoint_name(id, args). The base class routes it to http_service. (lib/koala/api.rb)
3. Add test coverage in spec/cases/graph_api_spec.rb using the shared examples and fixtures from spec/fixtures/facebook_data.yml (spec/cases/graph_api_spec.rb)

Add a new OAuth validation flow

1. Add a new public method in lib/koala/oauth.rb that calls http_service with the appropriate Facebook OAuth endpoint. (lib/koala/oauth.rb)
2. Register app credentials via lib/koala/configuration.rb using Koala.configure { |config| config.app_id = '...'; config.app_secret = '...' } (lib/koala/configuration.rb)
3. Add tests in spec/cases/oauth_spec.rb that mock the HTTP response using spec/support/mock_http_service.rb (spec/cases/oauth_spec.rb)

Add a new error type and custom handling

1. Define a new exception class in lib/koala/errors.rb inheriting from Koala::KoalaError. (lib/koala/errors.rb)
2. Update lib/koala/api/graph_error_checker.rb to detect the Facebook error code or pattern and raise your custom exception. (lib/koala/api/graph_error_checker.rb)
3. Add test in spec/cases/error_spec.rb that mocks a Facebook API error response and verifies the correct exception is raised. (spec/cases/error_spec.rb)

Add a new HTTP middleware or request hook

1. Create a hook method or middleware class in lib/koala/http_service.rb; integrate it into the request or response pipeline. (lib/koala/http_service.rb)
2. Update lib/koala/http_service/request.rb if pre-request transformation is needed (e.g., header injection, retry logic). (lib/koala/http_service/request.rb)
3. Add tests in spec/cases/http_service_spec.rb verifying the middleware is invoked with correct parameters. (spec/cases/http_service_spec.rb)

• Ruby gem — Lightweight wrapper around Facebook APIs; easy to bundle and distribute as a dependency for Rails and other Ruby web frameworks.
• Typhoeus (optional HTTP client) — Out-of-the-box performance; used for parallel requests and connection pooling when available, falls back to Net::HTTP.
• RSpec for testing — Standard Ruby testing framework; enables VCR cassettes for integration tests and detailed mocks for unit tests.
• VCR gem (cassettes) — Records real Facebook API responses during development; replay in CI to avoid external dependencies and rate limits.

• Minimal JSON wrapping; return plain hashes instead of models

  • Why: Keeps library lightweight and flexible; users can layer their own ORM or serialization.
  • Consequence: No type safety or lazy loading; developers must validate response structure themselves.

• Synchronous request/response only; no async/streaming built-in

  • Why: Simple and predictable for most use cases; avoids callback complexity.
  • Consequence: Long-running batch operations or large file uploads may block the thread; users must handle threading externally.

• OAuth token refresh delegated to caller

  • Why: Keeps scope narrow; library doesn't manage token storage or session state.
  • Consequence: Applications must implement token persistence and refresh logic.

• No built-in request caching or memoization

  • Why: Graph API is dynamic; caching semantics vary by endpoint.
  • Consequence: Repeated identical requests hit Facebook every time; users must layer their own cache.

• Does not handle token storage, session management, or persistent authentication state.
• Does not provide ORM or data modeling; returns raw hashes/JSON.
• Does not implement async requests, callbacks, or streaming responses.
• Does not handle webhook server implementation; only provides parsing utilities.
• Does not support non-HTTP transports (e.g., WebSocket).

1. Thread-safety: Koala.configure is not thread-safe (noted in README); avoid dynamic reconfiguration in multi-threaded apps. 2. OAuth state parameter: oauth.rb expects explicit state validation—don't skip this. 3. File uploads require lib/koala/http_service/uploadable_io.rb; raw file handles won't work. 4. Facebook API versioning: Koala targets a specific API version; confirm your token and endpoints match. 5. Batch operations (graph_batch_api.rb) have size limits (25 requests per batch); the gem does not auto-paginate.

• OAuth 2.0 Authorization Code Flow — lib/koala/oauth.rb implements the server-side OAuth exchange (code → access token); essential for secure user authentication without exposing app secrets.
• Batch Request Optimization — lib/koala/api/batch_operation.rb and graph_batch_api.rb implement Graph API batch requests (up to 25 calls in one HTTP request); critical for reducing API call quota usage.
• HTTP Adapter Pattern — lib/koala/http_service.rb uses a pluggable adapter pattern (Typhoeus or Net::HTTP); allows lightweight operation without heavy dependencies.
• Realtime Updates / Webhooks — lib/koala/realtime_updates.rb handles Facebook webhook subscription and signature validation; needed for push-based event notifications instead of polling.
• JSON Serialization & Dynamic Method Dispatch — lib/koala/api/graph_api_methods.rb uses method_missing to dynamically generate Graph API calls (get_object, get_connections, etc.) based on method names; elegant abstraction over HTTP.
• File Upload with Multipart Form Data — lib/koala/http_service/uploadable_io.rb handles streaming file uploads to Facebook's Graph API; non-trivial HTTP concern that abstracts away multipart encoding.

• facebook/facebook-sdk-for-javascript — Official Facebook SDK for a different platform; reference for API design and official feature parity.
• facebook/facebook-python-business-sdk — Official Facebook Business/Marketing API SDK for Python; mirrors Marketing API coverage that Koala supports.
• rails/rails — Koala integrates with Rails apps via Gemfile; common deploy target and configuration context.
• typhoeus/typhoeus — Recommended HTTP adapter for Koala (mentioned in README); Koala falls back to Net::HTTP without it.
• rspec/rspec-rails — Testing framework used in this repo; developers extending test coverage will use RSpec patterns.

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 comprehensive integration tests for GraphCollectionPagination edge cases

The repo has VCR cassettes for friend_list_next_page but spec/integration/graph_collection_spec.rb appears minimal. Given that lib/koala/api/graph_collection.rb handles pagination logic, there's a gap in testing real-world pagination scenarios (cursor-based vs offset, empty results, malformed links). This directly improves reliability for a core feature.

• [ ] Review spec/integration/graph_collection_spec.rb and lib/koala/api/graph_collection.rb to identify untested pagination paths
• [ ] Add VCR cassettes in spec/fixtures/vcr_cassettes/ for: cursor pagination, offset pagination, empty result sets, and malformed next page links
• [ ] Write integration tests covering edge cases like when cursors are invalid or pagination links are missing
• [ ] Verify batch pagination and collection iteration work correctly under stress

Add test coverage for lib/koala/http_service/uploadable_io.rb file upload edge cases

spec/cases/uploadable_io_spec.rb exists but spec/support/uploadable_io_shared_examples.rb suggests incomplete coverage. The spec/fixtures/ contains beach.jpg and cat.m4v but tests likely don't cover error cases like invalid file types, missing files, or chunked uploads. This is critical for a library handling file uploads.

• [ ] Audit spec/cases/uploadable_io_spec.rb against lib/koala/http_service/uploadable_io.rb to map untested code paths
• [ ] Add tests for: non-existent files, unsupported MIME types, large file handling, stream position edge cases, and concurrent uploads
• [ ] Create test fixtures for various file types and sizes if missing
• [ ] Add integration tests in spec/integration/ that verify actual upload behavior with mock HTTP service

Add GitHub Actions workflow for Ruby version matrix and dependency compatibility testing

The repo has .github/workflows/test.yml but it likely tests only one Ruby version. Given this is a library supporting Facebook APIs that evolve, testing against multiple Ruby versions (3.0, 3.1, 3.2, 3.3) and gemspec dependencies ensures backward/forward compatibility. The README shows build badges but the test matrix is probably limited.

• [ ] Review .github/workflows/test.yml to check Ruby version matrix coverage
• [ ] Extend the workflow to test against minimum (currently in koala.gemspec) and maximum supported Ruby versions
• [ ] Add separate job for dependency compatibility: test with oldest and newest versions of core dependencies
• [ ] Add a lint job running RuboCop against lib/ and spec/ directories (standard for Ruby projects)
• [ ] Ensure coverage reporting is properly configured for CodeClimate badge accuracy

• Add thread-safe configuration support: Koala.configure is explicitly not thread-safe per README. Refactor lib/koala/configuration.rb to use Mutex or other synchronization so concurrent Rails requests don't corrupt settings.
• Expand error coverage in graph_error_checker_spec.rb: Currently spec/cases/graph_error_checker_spec.rb may not cover all Facebook error codes (e.g., rate limiting, permission errors). Add tests for missing error scenarios and ensure each maps to the correct Koala exception class.
• Document batch operation limitations: Add inline YARD comments to lib/koala/api/batch_operation.rb explaining the 25-request limit, payload size constraints, and expected exception handling when batches fail partially—then add spec/cases/ tests for these edge cases.

The Koala Facebook library codebase shows a relatively good security posture with no obvious critical vulnerabilities visible in the file structure. However, the analysis is limited by the absence of dependency information (Gemfile) and actual code content. Main concerns are: (1) inability to assess dependency vulnerabilities without the Gemfile, (2) potential exposure of sensitive data in test fixtures and VCR cassettes, (3) OAuth implementation requires security review, and (4) general best practices for credential handling should be documented. The library appears well-structured with separated concerns (HTTP service, OAuth, API methods, error checking), which is positive. Ensure regular dependency audits, proper handling of test credentials, and documented security guidelines for users.

• Medium · Missing Dependency Information — Gemfile (not provided). The Gemfile content was not provided in the analysis context. Without visibility into the dependencies, it's impossible to verify if any gems have known security vulnerabilities or if outdated versions are being used. This is a critical part of Ruby application security. Fix: Provide the Gemfile content for dependency analysis. Regularly run 'bundle audit' or use tools like Dependabot to check for vulnerable gems. Keep all dependencies updated to their latest secure versions.
• Low · Potential Hardcoded Credentials in Test Fixtures — spec/fixtures/facebook_data.yml, spec/fixtures/mock_facebook_responses.yml. The presence of test fixture files (facebook_data.yml, mock_facebook_responses.yml) could potentially contain hardcoded tokens, API keys, or sensitive test data. While these are test fixtures, if real credentials are committed, they would pose a security risk. Fix: Ensure test fixtures use placeholder/dummy values only. Never commit real API credentials, tokens, or access keys. Use environment variables or secure secret management for any real credentials even in test environments. Add these files to .gitignore if they contain sensitive data.
• Low · VCR Cassettes May Contain Sensitive Data — spec/fixtures/vcr_cassettes/. VCR cassettes (in spec/fixtures/vcr_cassettes/) record actual HTTP interactions. If these cassettes were created using real API credentials or contain sensitive response data, they could expose security-relevant information if committed to version control. Fix: Review VCR cassettes for sensitive data before committing. Use VCR's record mode wisely and ensure cassettes are sanitized. Consider using VCR's filter_sensitive_data to automatically redact credentials from cassettes.
• Low · Missing Security Headers Documentation — lib/koala/http_service.rb, lib/koala/http_service/request.rb. As an HTTP-based API client library, the codebase doesn't show explicit enforcement of security headers or certificate validation best practices in the visible structure. Fix: Verify that SSL/TLS certificate validation is enforced by default. Ensure HTTPS is required for all API communications. Document security best practices for library users regarding secure credential handling.
• Low · OAuth Implementation Should Be Reviewed — lib/koala/oauth.rb. OAuth implementations can be vulnerable to various attacks (CSRF, token interception, etc.). Without reviewing the actual code, potential risks include improper state parameter validation, insecure token storage, or unencrypted token transmission. Fix: Conduct thorough security review of OAuth implementation. Ensure: state parameters are validated, tokens are transmitted over HTTPS only, PKCE is implemented for public clients, and tokens are not logged or exposed in debug information.

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.