fix(ws): raise bounded agent message limit

2026-08-22 10:46:00 +01:00
parent 1131f4330c
commit 74cb7f660f
5 changed files with 128 additions and 0 deletions
@@ -10,6 +10,13 @@ import (
 // (not iota ints) makes traffic readable in logs and packet captures.
 type MessageType string

+// MaxWebSocketMessageBytes is the protocol-wide upper bound for one agent ↔
+// server envelope. Snapshot projections and restic JSON log events can exceed
+// coder/websocket's 32 KiB default on ordinary repositories, so both peers set
+// this limit explicitly. It remains bounded to protect either process from an
+// untrusted or malfunctioning peer allocating without limit.
+const MaxWebSocketMessageBytes int64 = 8 << 20
+
 // Agent → server message types.
 const (
 	MsgHello          MessageType = "hello"