Add go output language

[jarsh921]

---

Summary by cubic

Adds Go as a supported output language. Generate a standard-library-first Go client and run it with go run api_client.go; the Go prompt now aligns filenames with the run command.

• New Features

  • Go codegen: new prompt partial favoring net/http and encoding/json, one shared http.Client, hardcoded auth, 401/403 refresh handling, and a gofmt step in testing instructions.
  • Engine updates: .go extension, language name “Go”, run command go run api_client.go, and conditional go.mod/go.sum when external deps are required.
  • CLI/settings and docs: output_language: "go" added to the picker and docs; tests cover extension, run command, and prompt content.

• Bug Fixes

  • Removed main.go reference in the Go prompt to match the saved api_client.go and go run api_client.go.

^{Written for commit 1092880. Summary will update on new commits.}

Greptile Summary

This PR adds Go as a supported output language. The main changes are:

• Adds Go selection and configuration support.
• Adds Go-specific client generation guidance.
• Uses api_client.go for saving, discovery, and execution.
• Adds tests and documentation for Go output.

Confidence Score: 5/5

This looks safe to merge.

• The Go save path and run command consistently use api_client.go.
• The earlier conflicting filename instruction has been removed.
• No blocking issue remains in the updated code.

Important Files Changed

Filename	Overview
src/reverse_api/prompts/partials/_language_go.md	Adds Go client-generation guidance and consistently names the output api_client.go.
src/reverse_api/base_engineer.py	Adds Go filename, display name, run command, and module-file handling.
src/reverse_api/cli.py	Adds Go to the output-language settings picker.
tests/test_base_engineer.py	Covers the Go extension, run command, and generated prompt.
tests/test_prompts.py	Covers rendering the Go prompt with the expected output filename.

_{Reviews (2): Last reviewed commit: "Fix conflicting Go output filename in th..." | Re-trigger Greptile}

[greptile-apps]

Conflicting Go Output Filenames

The prompt calls main.go the default, but the save path and run command require api_client.go. If generation follows the first instruction, go run api_client.go fails and later runs cannot discover the generated client.

Suggested change

	- Prefer the standard library (`net/http`, `encoding/json`) — a single `main.go` with no external dependencies is the default; only introduce a module and third-party packages if the API genuinely needs something the standard library doesn't provide (e.g. a specific auth scheme's signing library)
	- Prefer the standard library (`net/http`, `encoding/json`) — a single-file program with no external dependencies is the default; only introduce a module and third-party packages if the API genuinely needs something the standard library doesn't provide (e.g. a specific auth scheme's signing library)

Prompt To Fix With AI

This is a comment left during a code review.
Path: src/reverse_api/prompts/partials/_language_go.md
Line: 3

Comment:
**Conflicting Go Output Filenames**

The prompt calls `main.go` the default, but the save path and run command require `api_client.go`. If generation follows the first instruction, `go run api_client.go` fails and later runs cannot discover the generated client.

```suggestion
- Prefer the standard library (`net/http`, `encoding/json`) — a single-file program with no external dependencies is the default; only introduce a module and third-party packages if the API genuinely needs something the standard library doesn't provide (e.g. a specific auth scheme's signing library)
```

How can I resolve this? If you propose a fix, please make it concise.

[cubic-dev-ai]

All reported issues were addressed across 10 files

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>

[kalil0321]

@greptile review