fix(coding-agent): resolve models.json auth per request closes #1835

AGENTS.md

@@ -17,6 +17,7 @@ read README.md, then ask which module(s) to work on. Based on the answer, read t
 - **NEVER use inline imports** - no `await import("./foo.js")`, no `import("pkg").Type` in type positions, no dynamic imports for types. Always use standard top-level imports.
 - NEVER remove or downgrade code to fix type errors from outdated dependencies; upgrade the dependency instead
 - Always ask before removing functionality or code that appears to be intentional
+- Do not preserve backward compatibility unless the user explicitly asks for it
 - Never hardcode key checks with, eg. `matchesKey(keyData, "ctrl+x")`. All keybindings must be configurable. Add default to matching object (`DEFAULT_EDITOR_KEYBINDINGS` or `DEFAULT_APP_KEYBINDINGS`)
 
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