2026-07-22 – /fork Background Sessions & New Guardrail Caps

💡 /fork Now Runs in the Background While You Keep Working

Claude Code's /fork command now copies your current conversation into a new background session while you continue working in the original — useful for branching off an exploratory tangent ("what if we tried a different approach here?") without losing your place in the main thread. The same release adds a session-wide cap on WebSearch tool calls (default 200) and a per-session cap on subagent spawns (default 200) — both configurable, both aimed at preventing runaway resource consumption on very long autonomous sessions.

Why the default caps matter even if you rarely hit them

A 200-call WebSearch cap or a 200-subagent-spawn cap sounds generous until you consider a genuinely long unattended run — a research-heavy task iterating across many sub-questions could plausibly approach these limits. Worth knowing the defaults exist before a long run hits an unexpected stop, rather than discovering the cap mid-task.

⭐⭐⭐ code.claude.com

🧭 Federal Reserve Reports Losing Access to Claude Mythos for an Extended Period

Reporting indicates the Federal Reserve raised concerns after losing access to Anthropic's Mythos model for an extended period. Details on the underlying cause weren't broadly reported at time of writing — worth treating as a developing story rather than a fully resolved one. For any organisation running a critical workflow on a Mythos-tier model, it's a reminder that even well-resourced institutional customers aren't immune to access interruptions, and contingency planning (a fallback model, a documented degraded-mode workflow) is worth having regardless of how large or important your organisation is.

⭐⭐ anthropic.com