Claude Code 2.1.129 review: prompt cache TTL silently degraded, now fixed
The brief
2.1.129 fixes a silent prompt cache TTL downgrade from 1 hour to 5 minutes that inflated costs.
Key points
- 2.1.128 added parallel shell call resilience, subagent token savings, and reserved the MCP server name workspace.
Sources
- aifirst-reviewgithub.com
- Source codegithub.com