Praxis Architecture View

Container boundary: apps/esp32_lvgl

apps/esp32_lvgl is a candidate boundary for the C4 Container layer: it must behave as an application, service, data store, runnable unit, or part of a system that can be deployed/executed independently, rather than as a normal directory, code layering, or collection of shared tools.

Container candidate / high 0.1.30-alpha · 34aad0bffa2f / main

C4 hierarchical path

Current layer: Container, which explains an independently understandable application, service, data storage or running unit within the target system.
Upper layer: System Context, indicating which target software system the Container belongs to.
Lower layer: Component, explaining the entrance, interface, orchestration, adaptation, contract or shared object inside the Container.

Responsibility

apps/esp32_lvgl is an application-level Container candidate: repository evidence shows it is close to a runnable portal, desktop/frontend/backend application shell, or user-perceivable system capabilities.

Boundaries

The boundary comes from the warehouse path apps/esp32_lvgl. C4 Container is not equal to any package or code layer; only boundaries with applications, services, data storage, runtime portals, deployment units, external interfaces or independent execution semantics enter this layer. Ordinary configuration files, document directories, CI directories, warehouse management files and pure code layering can only be used as evidence or software structure model objects, not as Containers.

Relationship

Depends on other Containers: apps/linux_uconsole_gtk.
Contains 14 candidate component view objects, 18 run/collaboration links, and 0 run or build nodes.

Relationship with business complexity

This Container is not the business use case itself; it only explains the internal application/service/data storage/operation unit of the software system through which the business capability enters or passes.
If the Use Case in the organization/process model refers to this boundary, how it enters this Container should be explained in the Use Case drill-down document instead of writing the business process into the C4 Container diagram.

Correlation with technical complexity

Corresponds to the software structure model Package Diagram: docs/engineering/package-diagrams/apps-esp32_lvgl/package-diagram.html.
Continue to enter the software structure model to view drill-down UML, structural collaboration, running links and complexity candidate points.

C4 Container diagram

flowchart LR
  container["apps/esp32_lvgl"]
  dependency_1["apps/linux_uconsole_gtk"]
  container --> dependency_1

Explanation of elements in the diagram

apps/esp32_lvgl

Container · high

This node in the figure represents the apps/esp32_lvgl C4 Container; the current document records 14 component drill-down entries, 18 running collaboration threads, and 0 running or build nodes.

Responsibility: apps/esp32_lvgl is an application-level Container candidate: repository evidence shows it is close to a runnable portal, desktop/frontend/backend application shell, or user-perceivable system capabilities.
Boundaries: The boundary comes from the warehouse path apps/esp32_lvgl; the entry, service interface, application code, running configuration and deployment evidence under this path jointly support it to enter the Container layer. Ordinary configuration files, document directories or pure code layers will not form a Container alone.
Relationship meaning: The figure points from apps/esp32_lvgl to the external boundary, indicating that this runnable boundary will call, reference or depend on other Containers; these relationships are used to determine deployment, interfaces and change impacts.
Why it belongs to this layer: The node enters the Container layer because the local warehouse evidence shows that it has applications, services, data storage, running portals, deployment units, external interfaces, or independent execution semantics; not because it is just a directory or package.
Drill-down intention: Drill down from apps/esp32_lvgl to Component to view the decomposition of responsibilities within the boundary.

apps/linux_uconsole_gtk

Container · medium

apps/esp32_lvgl depends on apps/linux_uconsole_gtk.

Responsibility: apps/esp32_lvgl depends on apps/linux_uconsole_gtk.
Boundaries: apps/linux_uconsole_gtk does not belong to the internal boundaries of apps/esp32_lvgl; it is only a dependent adjacent module in the current graph.
Relationship meaning: apps/esp32_lvgl -> apps/linux_uconsole_gtk indicates that there are cross-boundary calls, references or configuration dependencies in the local warehouse evidence; it illustrates the direction of technical collaboration, but cannot independently prove the business process relationship.
Why it belongs to this layer: apps/linux_uconsole_gtk is projected as an adjacent Container candidate by path ownership, rather than apps/esp32_lvgl internal Component.
Drill-down intention: Enter the independent Container document of apps/linux_uconsole_gtk to view its own responsibilities and evidence; if there is no independent document, it will only be regarded as an external dependency fact.

Can drill down to C4

Component responsibility: apps/esp32_lvgl contains

Enter Component responsibility: apps/esp32_lvgl can answer "Container boundary: which internal components are hosted by apps/esp32_lvgl". Focus on portals, orchestration, adaptation, contracts, and shared objects rather than browsing the entire file.

Explain the key responsibility units inside apps/esp32_lvgl from the C4 Component layer: entry, page, command, interface, registry, adapter or shared object.

Code anchor point: apps/esp32_lvgl details

Enter the code anchor point: apps/esp32_lvgl to trace the architectural responsibility of the container boundary: apps/esp32_lvgl to the specific file/symbol anchor point; only when you need to determine the implementation entry or the impact of the change, you should drill down to Code.

Explain a few key code anchors in apps/esp32_lvgl from the C4 Code layer. The Code layer is not a code browser and is only used when you need to understand how architectural components fall into specific files/symbols.

Associated software structure model

apps/esp32_lvgl Package Diagram related_engineering

View the boundaries, dependencies and complexity candidates of the software structure package/module to which the Container belongs.

Evidence

apps/esp32_lvgl/APP_SHELL_MANIFEST.md
apps/esp32_lvgl/CMakeLists.txt
apps/esp32_lvgl/library.json
apps/esp32_lvgl/README.md
apps/esp32_lvgl/src/esp32_lvgl_app_shell.cpp
apps/esp32_lvgl/src/esp32_lvgl_app_shell.h
apps/esp32_lvgl/src/esp32_lvgl_arduino_app_registry.cpp
apps/esp32_lvgl/src/esp32_lvgl_arduino_app_runtime_access.cpp

Judgment basis

This boundary must be supported by running entry, build/deployment configuration, service interface, application entry, data storage or independent execution evidence; directory name, number of files or number of dependencies alone are not enough to establish.
When there is a lack of running, deployment, interface or data storage evidence, the generation process will reduce the confidence or not generate independent Containers.