solana-system-transaction is used at run time in 16 crates (of which 3 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 16 crates (of which 9 directly).

Depender (with downloads and own rev deps) solana-system-transaction version
284K 673 solana-sdk optional ^2.2.1
112K 26 solana-perf optional =2.2.1
29K 11 solana-faucet =2.2.1
117K 52 solana-rpc-client dev =2.2.1
56K 1 solana-transaction-metrics-tracker dev =2.2.1
31K 5 solana-cost-model dev =2.2.1
21K 10 solana-svm dev =2.2.1
20K 12 solana-runtime-transaction dev =2.2.1
10K 19 solana-entry dev =2.2.1
10K 9 solana-storage-bigtable dev =2.2.1
9.1K 8 solana-poh dev =2.2.1
7.1K 4 solana-unified-scheduler-pool dev =2.2.1