Issues

• v2: require the current state_update after session/resume

  agentclientprotocol/agent-client-protocol#2286 · Filter by author ayushin opened on Oct 2, 2026

• Permission prompts can silently lose tool-call context: DefaultOnError on rawInput

  agentclientprotocol/agent-client-protocol#1979 · Filter by author PMP57 opened on Aug 18, 2026
  6

• Session titles: agent-reported title is unreliable and clients cannot correct it — proposal: session/rename + title semantics

  agentclientprotocol/agent-client-protocol#1978 · Filter by author 0REZ opened on Aug 18, 2026

• PromptResponse.usage semantics are self-contradictory: "for this turn" vs. fields documented "across session" — implementations already diverge

  Bug

  agentclientprotocol/agent-client-protocol#1860 · Filter by author douglasjunior opened on Aug 3, 2026

• Tool calls that outlive their turn have no protocol expression

  agentclientprotocol/agent-client-protocol#1847 · Filter by author ivebenfreed opened on Aug 1, 2026
  1

• Proposal: standardize _meta.imageCapability extension for backend-advertised image limits + auto-handling flags

  agentclientprotocol/agent-client-protocol#1559 · Filter by author elfenlieds7 opened on Jun 30, 2026
  1