diffcue: closing the AI-CLI review loop
When I vibe-code with an AI CLI (Claude Code, Codebuddy, etc.), the loop is always the same: it makes changes, I read the diff, I want to say “line 42 is wrong, rename this” — and then I’m back in the terminal retyping file paths and line numbers. Reviewing in a scrolling terminal is slow and hides context. So I built diffcue to close that loop.
The idea
Review the diff → click lines to drop cues (little comments) → hit Copy Prompt → paste a clean, structured follow-up straight back into the CLI.
The output is exactly what the model wants to read:
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- src/app/ui.cpp:42 - this is wrong, rename to foo
- src/git/diff.cpp:88 - handle CRLF here
Grouped by file, sorted by line. No retyping, no lost context.
What it does
- GUI diff over your git working tree — side-by-side or inline.
- Per-line cues persisted to a
.diffcue/sidecar (gitignored). - Stale-cue tracking when a target line disappears after edits.
- Editable prompt pane before it hits the clipboard.
- Drag-and-drop a folder to switch repos;
Ctrl+O/Ctrl+F/Ctrl+Q. - Themes and editor palettes (Dracula, Dark/Light/Mariana).
Under the hood
C++17 with Dear ImGui (docking branch), a forked ImGuiColorTextEdit for the diff widget, GLFW + OpenGL, and NFD for the native folder picker. Git is just shelled out (git status / git show) — no libgit2. Everything statically links into a single self-contained binary.
Latest is v0.3.0. It’s MIT-licensed and, fittingly, itself created with GLM 5.2 + Codebuddy CLI → github.com/sindney/diffcue.