NevermindZZT/letter-shell

Health v2 · maintenance only

Adoption not part of the score

1884 stars · 572 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

letter shell is an embeddable shell written in C for embedded devices, allowing command-line invocation of C functions within a running program. It supports command auto-completion, user and permission management, variables, and proxy function argument parsing.

Use cases

• add a command-line shell to an embedded firmware
• call C functions in a running embedded program via serial console
• manage users and command permissions on an embedded device
• debug embedded hardware over UART with a shell
• run shell commands on a bare-metal microcontroller without an OS

When to choose

• you need an interactive command shell in C on an MCU or RTOS
• you want function-level command invocation with auto-completion and permissions in resource-constrained devices

When to avoid

• you need a full POSIX shell on a Linux system
• your project is not written in C or C-compatible code

Facets

library · maturity stable

cli terminal-ui developer-tools embedded-systems developer-tools embedded c cross-platform embedded-shell command-line-interface rtos bare-metal command-completion user-management command-line

Member repositories

For agents

markdown · JSON · MCP: product_card(name="NevermindZZT/letter-shell")