diff --git a/packages/coding-agent/docs/providers.md b/packages/coding-agent/docs/providers.md
index 15f4ed4a..689b33bf 100644
--- a/packages/coding-agent/docs/providers.md
+++ b/packages/coding-agent/docs/providers.md
@@ -135,7 +135,7 @@ Or set `GOOGLE_APPLICATION_CREDENTIALS` to a service account key file.
 
 **Via models.json:** Add Ollama, LM Studio, vLLM, or any provider that speaks a supported API (OpenAI Completions, OpenAI Responses, Anthropic Messages, Google Generative AI). See [models.md](models.md).
 
-**Via extensions:** For providers that need custom API implementations or OAuth flows, create an extension. See [extensions.md](extensions.md) and [examples/extensions/custom-provider-gitlab-duo](../examples/extensions/custom-provider-gitlab-duo/).
+**Via extensions:** For providers that need custom API implementations or OAuth flows, create an extension. See [custom-provider.md](custom-provider.md) and [examples/extensions/custom-provider-gitlab-duo](../examples/extensions/custom-provider-gitlab-duo/).
 
 ## Resolution Order