zed-industries/zed · error · anyhow::Error

Unknown agent id {id:?}. Call `list_agents_and_models` to se

Error message

Unknown agent id {id:?}. Call `list_agents_and_models` to see the agents available for `create_thread`.

What it means

Error "Unknown agent id {id:?}. Call `list_agents_and_models` to see the agents available for `create_thread`." thrown in zed-industries/zed.

Source

Thrown at crates/agent_ui/src/agent_panel.rs:4738

            let agent_choice = match request.agent_id.as_deref() {
                None => None,
                Some(id) if id == agent::ZED_AGENT_ID.as_ref() => Some(Agent::NativeAgent),
                Some(id) => {
                    // Reject unknown agent ids up front so the model gets a
                    // structured error pointing at `list_agents_and_models`,
                    // rather than a thread that silently fails to launch in
                    // the user's sidebar.
                    let known = panel
                        .read_with(cx, |panel, cx| {
                            let store = panel.project.read(cx).agent_server_store().clone();
                            store
                                .read(cx)
                                .external_agents()
                                .any(|known_id| known_id.0.as_ref() == id)
                        })
                        .unwrap_or(false);
                    if !known {
                        return Err(anyhow!(
                            "Unknown agent id {id:?}. Call `list_agents_and_models` \
                             to see the agents available for `create_thread`."
                        ));
                    }
                    Some(Agent::Custom {
                        id: project::AgentId(id.to_string().into()),
                    })
                }
            };

            let initial_content = AgentInitialContent::ContentBlock {
                blocks: vec![acp::ContentBlock::Text(acp::TextContent::new(
                    request.prompt.clone(),
                ))],
                auto_submit: true,
            };

            let title: SharedString = request.title.clone();

View on GitHub (pinned to bc538def45)

When it happens

Trigger: Thrown at crates/agent_ui/src/agent_panel.rs:4738 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of zed-industries/zed@bc538def45 (2026-08-16). Data as JSON: /api/errors/8d8f628aa654740b. Report an issue: GitHub.