chore: rename INIT.md to prompt_for_init_command.md and move closer to usage (#1886)

Addressing my post-commit review feedback on
https://github.com/openai/codex/pull/1822.

codex-rs/tui/prompt_for_init_command.md

@@ -0,0 +1,40 @@
+Generate a file named AGENTS.md that serves as a contributor guide for this repository.
+Your goal is to produce a clear, concise, and well-structured document with descriptive headings and actionable explanations for each section.
+Follow the outline below, but adapt as needed — add sections if relevant, and omit those that do not apply to this project.
+
+Document Requirements
+
+- Title the document "Repository Guidelines".
+- Use Markdown headings (#, ##, etc.) for structure.
+- Keep the document concise. 200-400 words is optimal.
+- Keep explanations short, direct, and specific to this repository.
+- Provide examples where helpful (commands, directory paths, naming patterns).
+- Maintain a professional, instructional tone.
+
+Recommended Sections
+
+Project Structure & Module Organization
+
+- Outline the project structure, including where the source code, tests, and assets are located.
+
+Build, Test, and Development Commands
+
+- List key commands for building, testing, and running locally (e.g., npm test, make build).
+- Briefly explain what each command does.
+
+Coding Style & Naming Conventions
+
+- Specify indentation rules, language-specific style preferences, and naming patterns.
+- Include any formatting or linting tools used.
+
+Testing Guidelines
+
+- Identify testing frameworks and coverage requirements.
+- State test naming conventions and how to run tests.
+
+Commit & Pull Request Guidelines
+
+- Summarize commit message conventions found in the project’s Git history.
+- Outline pull request requirements (descriptions, linked issues, screenshots, etc.).
+
+(Optional) Add other sections if relevant, such as Security & Configuration Tips, Architecture Overview, or Agent-Specific Instructions.

codex-rs/tui/src/app.rs

@@ -303,7 +303,7 @@ impl App<'_> {
                     SlashCommand::Init => {
                         // Guard: do not run if a task is active.
                         if let AppState::Chat { widget } = &mut self.app_state {
-                            const INIT_PROMPT: &str = include_str!("../../../INIT.md");
+                            const INIT_PROMPT: &str = include_str!("../prompt_for_init_command.md");
                             widget.submit_text_message(INIT_PROMPT.to_string());
                         }
                     }