jamesmunns/postcard
A no_std + serde compatible message library for Rust observed · 2026-08-28
Health v2 · maintenance only
77/100
- Activity 93
- Release rhythm 44
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 3.5
- age_days: 2709
- days_rel: 375
- days_push: 44
- n_releases_24m: 13
Adoption not part of the score
1494 stars · 141 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Postcard is a no_std-focused serializer and deserializer for Serde in Rust, designed for embedded and other constrained environments. It provides a stable, documented wire format with varint encoding and supports heapless and alloc-based serialization.
Use cases
- serialize messages on a microcontroller with no_std
- use serde in embedded Rust firmware
- exchange data between MCU and desktop over serial
- compact binary encoding of Rust structs
- drop-in serde format replacement for constrained devices
When to choose
- writing embedded Rust with no_std and serde
- needing a compact, stable binary wire format
- communicating between microcontroller and host with the same code
When to avoid
- needing human-readable formats like JSON
- building non-Rust systems without serde support
Facets
library · maturity stable
serialization embedded embedded-systems developer-tools embedded rust cross-platform no-std serde wire-format varint cobs framing microcontroller
2 sources
- readme: https://github.com/jamesmunns/postcard · fetched 2026-08-28 · a08827c37f61
- registry_crates: https://crates.io/api/v1/crates/postcard · fetched 2026-08-29 · 026eaf6c19da
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| jamesmunns/postcard | main | 77 |
For agents
markdown · JSON · MCP: product_card(name="jamesmunns/postcard")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem