Claude Code v2.1.101: OS CA Trust by Default and Long-Session Reliability Sweep
Claude CodeClaude Code v2.1.101 enables OS CA certificate trust by default, resolving a long-standing connectivity issue for enterprise users behind corporate TLS proxies. The release also ships a broad set of session reliability fixes targeting edge cases in long-running and high-volume sessions, including tool execution loop stability, memory management improvements, and more predictable session teardown.
Key Takeaways
- OS CA certificate trust is now enabled by default, resolving TLS verification failures for enterprise users behind corporate proxies without any manual configuration.
- Corporate proxy users on managed machines no longer need NODE_EXTRA_CA_CERTS workarounds — Claude Code now inherits the system CA store automatically.
- Tool execution loop stability improves for high-volume agentic sessions, fixing edge cases that could stall or corrupt the loop state during extended automated runs.
- Memory management is more predictable across long sessions processing large files or accumulating significant context, reducing the risk of degraded performance or unexpected termination.
- Session teardown is more reliable, with edge cases involving concurrent operations at session end now handled gracefully rather than producing partial saves.
- Brief-mode retry behavior is fixed, ensuring recoverable errors in brief output mode trigger clean retries without producing duplicate output.
Sources & Mentions
5 external resources covering this update
New Default: OS CA Certificate Trust
Claude Code v2.1.101 changes the default TLS behavior to trust the operating system's CA certificate store. This is a significant change for enterprise environments: developers working behind corporate proxies that perform TLS inspection have historically hit certificate verification failures when Claude Code attempted to reach the Anthropic API through an intercepting proxy. Because Claude Code previously used its own bundled certificate trust store rather than the OS-level store, corporate-managed CA certificates installed by IT were not recognized.
With this change, Claude Code now inherits the system's certificate trust configuration automatically. For most developers this is invisible — the behavior for direct connections is unchanged. For enterprise users on managed machines with corporate proxy CAs installed at the OS level, this eliminates a class of connectivity failures that previously required manual workarounds such as setting NODE_EXTRA_CA_CERTS or disabling certificate verification entirely.
This default can be overridden via configuration for environments where the previous behavior is preferred.
Long-Session Reliability Improvements
Tool Execution Loop Stability
Several edge cases in the tool execution loop have been addressed. In long sessions involving high volumes of tool calls — particularly sessions running automated workflows or agentic loops — certain failure modes could cause the execution loop to stall or enter an inconsistent state. The fixes in v2.1.101 improve loop stability under these conditions, making extended agentic runs more reliable.
Memory Management
Memory handling improvements target sessions that process large files or accumulate significant context over time. Certain patterns of context growth could lead to degraded performance or unexpected session termination in prior versions. The improvements in this release make memory management more predictable across session lifetimes.
Session Teardown
Session teardown — the process of cleanly ending a Claude Code session and persisting its state — has been made more reliable. Edge cases involving concurrent operations at session end could previously result in partial state saves or errors on exit. These are now handled more gracefully.
Other Fixes
v2.1.101 also includes a brief-mode retry improvement, ensuring that when Claude Code operates in brief output mode and encounters a recoverable error, retry behavior is consistent and does not produce duplicate output. Several smaller fixes address edge cases in output rendering and tool result handling.