Project guide: AGENTS.md as the single guide, gate target, Junie pointer

CLAUDE.md is a one-line @AGENTS.md import; make gate configures, builds, and runs kte_tests. CMakeLists.txt registers the tests with CTest. .junie/guidelines.md points Junie at AGENTS.md.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

.junie/guidelines.md

@@ -1,58 +1,2 @@
-# Project Guidelines
-
-kte is Kyle's Text Editor — a simple, fast text editor written in C++20.
-It
-replaces the earlier C implementation, ke (see the ke manual in
-`docs/ke.md`). The
-design draws inspiration from Antirez' kilo, with keybindings rooted in
-the
-WordStar/VDE family and emacs. The spiritual parent is `mg(1)`.
-
-These guidelines summarize the goals, interfaces, key operations, and
-current
-development practices for kte.
-
-## Goals
-
-- Keep the core small, fast, and understandable.
-- Provide an ncurses-based terminal-first editing experience, with an
-  additional ImGui GUI.
-- Preserve familiar keybindings from ke while modernizing the internals.
-- Favor simple data structures (e.g., piece table) and incremental
-  evolution.
-
-Project entry point: `main.cpp`
-
-## Core Components (current codebase)
-
-- Buffer: editing model and file I/O (`Buffer.h/.cpp`).
-- PieceTable: editable in-memory text representation (
-  `PieceTable.h/.cpp`).
-- InputHandler: interface for handling text input (`InputHandler.h/`),
-  along
-  with `TerminalInputHandler` (ncurses-based) and `GUIInputHandler`.
-- Renderer: interface for rendering text (`Renderer.h`), along with
-  `TerminalRenderer` (ncurses-based) and `GUIRenderer`.
-- Editor: top-level editor state (`Editor.h/.cpp`).
-- Command: command model (`Command.h/.cpp`).
-- General purpose editor functionality (`Editing.h/.cpp`)
-
-## Keybindings (inherited from ke)
-
-The file `docs/ke.md` contains the canonical reference for keybindings.
-
-## Contributing/Development Notes
-
-- C++ standard: C++20.
-- Keep dependencies minimal.
-- Prefer small, focused changes that preserve ke’s UX unless explicitly
-  changing
-  behavior.
-
-## References
-
-- Previous editor manual: `ke.md` (canonical keybinding/spec reference
-  for now).
-- Inspiration: kilo, WordStar/VDE, emacs, `mg(1)`.
-
-
+Read AGENTS.md at the repository root before anything else. It is the only
+project guide; this file exists because Junie cannot import it.