[tippmar-nr]

Summary

dotnet10 is listed as supported in the README, and the .NET layer is published with dotnet10 as a compatible runtime, but RUNTIME_CONFIG stops at dotnet8. layers install and layers uninstall both reject any runtime not in that dict, so they fail on every .NET 10 function.

 RUNTIME_CONFIG = {
     "dotnet6": {"LambdaExtension": True},
     "dotnet8": {"LambdaExtension": True},
+    "dotnet10": {"LambdaExtension": True},

Evidence

• Before: on a dotnet10 function, newrelic-lambda layers install stops at layers.py:120 and layers uninstall stops at layers.py:546, both with Unsupported Lambda runtime for '<arn>': dotnet10.
  After: test_add_new_relic_dotnet now covers dotnet6, dotnet8, dotnet10 and sets the CORECLR_* variables for each; test_supports_lambda_extension includes dotnet10. Full suite: 100 passed, black --check clean.

Merge Danger

Door: two-way

Blast Radius: small

Only dotnet10 functions change behavior, from an error to the same install and uninstall paths dotnet8 uses.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.58%. Comparing base (0485dd1) to head (4632d8d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #393   +/-   ##
=======================================
  Coverage   70.58%   70.58%           
=======================================
  Files          20       20           
  Lines        1897     1897           
=======================================
  Hits         1339     1339           
  Misses        558      558           

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