X_AGENT_TRANSCRIPT_INVALID
Means
an agent was asked to continue from a transcript it cannot read
Typical cause
agent.continue() was handed a handle that is not the value a .run() or .continue() of the same agent and prompt version returned: another version or agent, over 2,000,000 characters, messages out of order, a block a tool loop never writes, a tool call nothing answers, or an empty user turn. Refused before anything is loaded, reserved or sent
Fix
agent.run(input, { ctx }) — start a new run and store its transcript; pass back exactly that value