Crate mcpmesh_codec 

mcpmesh-codec: the family’s ONE wire codec (mcpmesh spec §7.3) — compact JSON, UTF-8, one frame per \n, 16 MiB cap.

Both ends of every wire share THIS implementation: the daemon side re-exports it as mcpmesh_net::framing, and the no-iroh client side (kb, loc, the host shell) as mcpmesh_local_api::codec — so the two ends can never drift apart. Deliberately tiny: serde_json + tokio io traits only, NO iroh. Session POLICY (violation strikes, synthesized error frames) stays with the session owners (mcpmesh-net); only the pure codec lives here.

Structs

FrameReader

NDJSON frame reader over any AsyncRead. Reads byte-at-a-time from an INTERNAL BufReader (misuse-proof: callers cannot forget the buffering and pay a poll-per-byte penalty).

Enums

Inbound

One inbound frame, or a framing violation (kept distinct so callers can log/strike).

Violation

Constants

MAX_FRAME_BYTES

16 MiB — the family frame cap (mcpmesh §7.3, spec §12 default). App payloads are ≤1 MiB by policy.

Functions

write_frame

Serialize frame and write it terminated by \n, flushing (a BufWriter-safe no-op for unbuffered writers — makes BufWriter wrapping misuse-proof).