Show HN: Stop parallel AI coding sessions clobbering each other's handoffs
A new tool called claude-handoff-guard aims to prevent issues caused by concurrent AI coding sessions overwriting each other's handoff notes. It introduces a PreToolUse hook that enforces ownership of handoff files, blocking writes if there is a mismatch in session IDs. This solution addresses the problem of session clobbering, ensuring that handoff files are self-identifying and secure across different devices and sessions.
- ▪The claude-handoff-guard tool prevents concurrent coding sessions from overwriting each other's handoff notes.
- ▪It uses a PreToolUse hook to enforce ownership of handoff files by comparing session IDs.
- ▪The tool ensures that handoff files are self-identifying and secure across devices and sessions.
Opening excerpt (first ~120 words) tap to expand
claude-handoff-guard Hook-enforced ownership for AI coding session handoffs. Most "handoff" tools solve amnesia: capture state to a markdown file, restore it after compaction or a new session. That problem is well covered. This one solves the problem nobody enforces: concurrent clobber. When two sessions work the same repo, or you resume on a second machine, or a background agent runs alongside an interactive one, they overwrite each other's handoff notes and you do not find out until the context you needed is gone. The fix here is not a better template. It is a PreToolUse hook that makes a cross-session overwrite structurally blocked, not merely discouraged.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at GitHub.