Recovery tool for "API Error: 400 diagnostics.previous_message_id: must be the id from a prior /v1/messages response (starts with msg_)" · Claude Code session corruption after upstream 429/503/504/529 cascades · issues #58427 #59520
bug-fix anthropic recovery-tool claude-code session-recovery claude-code-bug previous-message-id 529-cascade claude-code-58427 claude-code-59520
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Updated
May 26, 2026 - Shell