---
name: framework
version: 1.0.0
lang: cpp
description: "Core C++ ImGui app shell: fn::run_app, AppConfig, GLFW + OpenGL + ImGui + ImPlot bootstrap, theming (Mantine dark + indigo), settings/about/menubar/layouts UI, Tabler icons, logging, viewports & AltSnap-safe sizemove, local_files dir, embedded layout storage."
members:
  - tokens_cpp_core
  - icon_font_cpp_core
  - app_settings_cpp_core
  - app_about_cpp_core
  - fps_overlay_cpp_core
  - panel_menu_cpp_core
  - layouts_menu_cpp_core
  - app_menubar_cpp_core
  - logger_cpp_core
  - log_window_cpp_core
  - gl_loader_cpp_gfx
  - layout_storage_cpp_core
  - selectable_text_cpp_core
tags: [framework, imgui, cpp, core]
dir_path: cpp/framework
---

## Documentation

Foundational C++ ImGui app shell shared by every desktop app in the registry. Apps opt-in transparently — every C++ app already links `fn_framework` via the `add_imgui_app` macro. The framework provides:

- `fn::run_app(cfg, render_fn)`: GLFW + OpenGL3 + ImGui + ImPlot setup, multi-viewport, docking, AltSnap-safe sizemove, icon attach, layouts persistence, log window, settings window, about window, menubar.
- `fn::local_path(name)`: scoped writable path under `<exe_dir>/local_files/`.
- Design tokens (Mantine dark + indigo accent).
- Tabler icons (TI_* macros).
- `fn::framework_version()` / `fn::framework_description()` (post 1.0.0).

Apps NEVER list these members in their own `uses_functions` — they come transitively via `fn_framework`. Audited via [[cpp_apps]] rule.

### Version policy

Semver. Major = breaking ABI/API of public `fn::run_app` or `AppConfig`. Minor = additive (new optional config field, new helper). Patch = bugfix.

### Boundaries

Framework does NOT include modules like `data_table`. Apps that want tables opt-in via `uses_modules: [data_table_cpp]` and `target_link_libraries(<app> PRIVATE fn_module_data_table)`. The framework is intentionally small.

## Capability growth log

- v1.0.0 (2026-05-16) — Initial framing as a versioned module. Members above are the bundled units of `fn_framework` static lib. Pre-1.0.0 history lives in git.

## Notes

- Static lib target: `fn_framework` (defined in `cpp/CMakeLists.txt`).
- Generated header `cpp/framework/version_generated.h` (gitignored) exposes `FN_FRAMEWORK_VERSION` constant.
- About panel of every app reads `fn::framework_version()` at runtime.
