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Summary

This PR modifies the OpenAPI mustache template to prevent duplicate auth method code generation when multiple servers are defined in the schema. The change uses{{#-first}}...{{/-first}} tags to ensure only the first auth method is generated, avoiding redundant code when schemas define multiple servers (e.g., US and EU).

Findings

Finding 1: Template change is correct and effective for the stated goal.

The addition of{{#-first}} and{{/-first}} wrapper tags around the auth methods section (lines 356 and 395 in support/openapi-template/reqwest-trait/api.mustache:356-395) successfully limits code generation to the first auth method, preventing duplicate bearer_auth calls.

Finding 2: 💭 Consider edge cases with multiple different auth methods.

The current implementation assumes all servers share the same auth method. If a future schema defines servers with different auth methods (e.g., Server 1 uses OAuth, Server 2 uses API key), this change would silently ignore all but the first. While this scenario seems unlikely given the PR description, it might be worth documenting this assumption.

// Before: With US and EU servers both using oauth_access_tokenifletSome(ref token) = config.oauth_access_token{    request = request.bearer_auth(token.to_owned());};ifletSome(ref token) = config.oauth_access_token{    request = request.bearer_auth(token.to_owned());};// After: Only one auth blockifletSome(ref token) = config.oauth_access_token{    request = request.bearer_auth(token.to_owned());};

Finding 3: 🎨 PR description could include example of generated code impact.

The PR description shows the before/after for generated Rust code, which is excellent. Consider also showing the template change itself to help reviewers understand the mustache syntax if they're unfamiliar with it.

Good Practices Observed

• Clear PR objective explaining the problem and solution
• Minimal, targeted change that doesn't affect functionality
• No breaking changes to existing generated code (only removes redundant operations)
• Aligns with CLAUDE.md guidance that auto-generated code changes are discouraged, but this modifies the template itself, which is appropriate

Verification

The change correctly:

• Wraps all auth method implementations (supportTokenSource, isApiKey, isBasic, isOAuth) with first-iteration check
• Preserves the{{#hasAuthMethods}} outer guard
• Maintains all existing logic within the first iteration block
• Will reduce code size when server#6653 adds US/EU server definitions

🔍 SDK Breaking Change Detection Results

SDK Version:ps/bindings-only-one-auth (e27e4b0)
Completed: 2025-11-27 15:05:11 UTC
Total Time: 218s

Breaking change detection completed.View SDK workflow

Checkmarx One – Scan Summary & Details –6d1317b0-8956-4e14-abce-dea46181d113

Great job! No new security vulnerabilities introduced in this pull request

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.46%. Comparing base (4b0d128) to head (e27e4b0).
⚠️ Report is 2 commits behind head on main.

@@           Coverage Diff           @@##             main     #589   +/-   ##=======================================  Coverage   79.46%   79.46%           =======================================  Files         302      302             Lines       32331    32331           =======================================  Hits        25691    25691             Misses       6640     6640

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