fix: use GET /v1/models for Anthropic connection test

[CybotTM]

Summary

The setup wizard's connection test for Anthropic providers sent GET /v1/messages, which only accepts POST, causing a 405 Method Not Allowed error.

Changed to GET /v1/models which Anthropic supports and is consistent with how other providers (OpenAI, Gemini) are tested.

Related

Related to #98 (wizard endpoint URL issues)

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves a critical issue in the setup wizard where Anthropic provider connection tests failed due to an incorrect API endpoint. By switching the test endpoint from '/v1/messages' to '/v1/models', the system now correctly verifies Anthropic API keys and endpoints, preventing '405 Method Not Allowed' errors and ensuring a smoother setup experience for users integrating Anthropic services.

Highlights

• Anthropic Connection Test Fix: Corrected the API endpoint used for Anthropic provider connection tests in the setup wizard from '/v1/messages' to '/v1/models'. This resolves a '405 Method Not Allowed' error encountered during the connection test.
• Consistency with Other Providers: The updated Anthropic endpoint '/v1/models' is consistent with how other providers like OpenAI and Gemini are tested, ensuring a standardized approach to model discovery.

Changelog

• Classes/Service/SetupWizard/ModelDiscovery.php
  • Updated the Anthropic endpoint for connection testing to '/v1/models'.

Activity

• No human activity has been recorded on this pull request yet.

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[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[github-actions]

Automated approval for solo maintainer project

This PR has passed all automated quality gates:

• ✅ Static analysis (PHPStan)
• ✅ Code style (PHP-CS-Fixer)
• ✅ Unit & functional tests
• ✅ Security scanning
• ✅ Dependency review

See SECURITY_CONTROLS.md for compensating controls documentation.

[gemini-code-assist]

Code Review

This pull request fixes a connection test issue for Anthropic providers by changing the test endpoint from "/v1/messages" to "/v1/models". However, the "testConnection" method remains vulnerable to Server-Side Request Forgery (SSRF) and potential API key leakage because it uses an unvalidated user-provided endpoint URL. It is recommended to implement strict URL validation for the provider endpoint. Additionally, I've suggested a refactoring of the endpoint selection logic to improve code clarity and address a similar inconsistency for the "groq" provider.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.48%. Comparing base (7c5a07c) to head (3920d33).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #106   +/-   ##
=========================================
  Coverage     92.48%   92.48%           
  Complexity     1937     1937           
=========================================
  Files            77       77           
  Lines          6849     6849           
=========================================
  Hits           6334     6334           
  Misses          515      515           

Flag	Coverage Δ
unit	92.48% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
Classes/Service/SetupWizard/ModelDiscovery.php	91.95% <100.00%> (ø)

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[Copilot]

Pull request overview

Fixes the Setup Wizard’s Anthropic connection test by switching the probe endpoint from GET /v1/messages (invalid; POST-only) to GET /v1/models (valid), aligning Anthropic with the “list models” style checks used for other providers.

Changes:

• Update Anthropic connection test endpoint to .../v1/models to avoid 405 responses.

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