Update inference endpoint in models client to use the now preferred models.github.ai

[garman]

Aims to do the following

• update the base url to point to models.github.ai
• update the model param formatting to {publisher}/{name}
• update relevant documentation
• update display of list view
• update how the models are displayed from a bare run or view command
• add a FormatIdentifier func for consistently displaying model ID's in the places we do so

GitHub models is switching from using https://models.inference.ai.azure.com/chat/completions as the target endpoint for inference. The preferred inference endpoint is now https://models.github.ai/inference/chat/completions. models.github.ai expects the model param to be a composite of the model's publisher and the model's name -- downcased and with - in pace of .

The url and required param format changes made the changes to some verbiage and how we compare and display model names (now called ID in the list output) a requirement as well.

---

NOTE: some naming of packages, files, and functions may no longer be fully accurate. Updating that naming is out of scope for this change, and may still be inconsistent even if updated given the current transition period.

[Copilot]

Pull Request Overview

This PR updates the inference endpoint and changes the model parameter formatting to use a composite identifier (publisher/name) throughout the client, tests, and documentation.

• Update default endpoint URL from Azure to GitHub models
• Replace bare model names with composite identifiers via FormatIdentifier
• Adjust tests, CLI commands, and docs accordingly

Reviewed Changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
internal/azuremodels/model_summary_test.go	Updated tests to validate composite identifier behavior
internal/azuremodels/model_summary.go	Modified HasName and sorting logic to use composite identifiers
internal/azuremodels/model_details_test.go	Added tests for the new FormatIdentifier function
internal/azuremodels/model_details.go	Implemented FormatIdentifier to format publisher and model names
internal/azuremodels/azure_client_config.go	Updated default inference endpoint URL
cmd/view/view_test.go	Updated tests to use composite identifiers for the view command
cmd/view/view.go	Revised examples and prompt options to use composite identifiers
cmd/run/run_test.go	Updated tests to use composite identifiers for the run command
cmd/run/run.go	Updated prompt options and removed legacy bare model name handling
cmd/root.go	Minor import reordering
cmd/list/list_test.go	Updated header and tests to reflect composite identifier usage
cmd/list/list.go	Changed table display to show the composite identifier instead of bare name
README.md	Updated CLI usage examples and instructions with composite identifier

Comments suppressed due to low confidence (2)

cmd/run/run.go:441

• The removal of reassigning modelName to the bare model name was intentional to enforce the composite identifier format. Please verify that downstream logic correctly handles the composite identifier.

modelName = model.Name

internal/azuremodels/model_summary.go:28

• HasName now only compares against the composite identifier, removing the fallback to FriendlyName or bare Name. Please confirm that this change in behavior aligns with the updated requirements.

modelID := FormatIdentifier(m.Publisher, m.Name)

[Copilot]

[nitpick] Consider trimming whitespace from the publisher and model name before formatting in FormatIdentifier to avoid unintended hyphens from extra spaces.

Suggested change

	// Replace spaces with dashes and convert to lowercase
	result := strings.ToLower(s)
	// Trim whitespace, replace spaces with dashes, and convert to lowercase
	result := strings.TrimSpace(s)
	result = strings.ToLower(result)

[cheshire137]

This feels more expected to pass some 'id' field in a command, instead of 'name'. 👍🏻