v2.1.144

Source: Anthropic Claude Code Date: 2026-05-19 URL: https://github.com/anthropics/claude-code/releases/tag/v2.1.144

Summary

Claude Code v2.1.144, released 2026-05-19, focuses heavily on background session reliability and Windows parity. Key additions: /resume support for --bg sessions, elapsed-duration notifications on subagent completion, and per-session model switching (with d to set a default). A significant startup hang fix reduces cold-start delay from up to 75 seconds to ~15 seconds when the Anthropic API is unreachable (captive portal, VPN, firewall).

Implications

• Agent orchestration / lifecycle — Background session management is receiving sustained investment: resume, renaming, worktree isolation, and subagent task-panel cleanup all shipped together. This points toward background/headless agents becoming a first-class deployment pattern, not just a power-user feature.
• Enterprise / remote deployment — The startup hang fix and Bedrock/Vertex model-picker regression fix are directly relevant to air-gapped or proxy-heavy enterprise environments; these signals suggest enterprise hardening is a parallel priority alongside new features.
• Dev tooling — MCP paginated tools/list fix (silently dropped tools on large servers) and the .mcp.json parse-error surfacing are quality-of-life improvements that matter as MCP server counts grow in complex project setups.