#!/usr/bin/env bash
# Prompts handler implementation.
# Error responses use JSON-RPC 2.0 codes (e.g., -32601 method not found,
# -32602 invalid params, -32603 internal error).
set -euo pipefail
mcp_handle_prompts() {
local method="$1"
local json_payload="$2"
local id
if ! id="$(mcp_json_extract_id "${json_payload}")"; then
id="null"
fi
if mcp_runtime_is_minimal_mode; then
local message
message=$(mcp_json_quote_text "Prompts capability unavailable in minimal mode")
mcp_handler_error_response "${id}" "-32601" "${message}"
return 0
fi
case "${method}" in
prompts/list)
local limit cursor list_json
limit="$(mcp_json_extract_limit "${json_payload}")"
cursor="$(mcp_json_extract_cursor "${json_payload}")"
if ! list_json="$(mcp_prompts_list "${limit}" "${cursor}")"; then
local code
code="$(mcp_handler_normalize_error_code "${_MCP_PROMPTS_ERROR_CODE:-}")"
local message
message=$(mcp_json_quote_text "${_MCP_PROMPTS_ERROR_MESSAGE:-Unable to list prompts}")
mcp_handler_error_response "${id}" "${code}" "${message}"
return 0
fi
mcp_handler_success_response "${id}" "${list_json}"
if mcp_logging_is_enabled "debug"; then
mcp_logging_debug "${MCP_PROMPTS_LOGGER}" "List count=${MCP_PROMPTS_TOTAL}"
fi
;;
prompts/get)
local name args_json metadata rendered
name="$(mcp_json_extract_prompt_name "${json_payload}")"
if [ -z "${name}" ]; then
local message
message=$(mcp_json_quote_text "Prompt name is required")
mcp_handler_error_response "${id}" "-32602" "${message}"
return 0
fi
args_json="$(mcp_json_extract_prompt_arguments "${json_payload}")"
if [ -z "${args_json}" ]; then
args_json="{}"
fi
mcp_prompts_refresh_registry || {
local message
message=$(mcp_json_quote_text "Unable to load prompts registry")
mcp_handler_error_response "${id}" "-32603" "${message}"
return 0
}
if ! metadata="$(mcp_prompts_metadata_for_name "${name}")"; then
local message
message=$(mcp_json_quote_text "Prompt not found")
# Unknown prompt name is an invalid-params condition, not a missing method.
mcp_handler_error_response "${id}" "-32602" "${message}"
return 0
fi
if ! mcp_prompts_render "${metadata}" "${args_json}"; then
local message
message=$(mcp_json_quote_text "Unable to render prompt")
mcp_handler_error_response "${id}" "-32603" "${message}"
return 0
fi
rendered="${_MCP_PROMPTS_RESULT}"
if mcp_logging_is_enabled "debug"; then
mcp_logging_debug "${MCP_PROMPTS_LOGGER}" "Get name=${name}"
fi
mcp_handler_success_response "${id}" "${rendered}"
;;
*)
local message
message=$(mcp_json_quote_text "Unknown prompts method")
mcp_handler_error_response "${id}" "-32601" "${message}"
;;
esac
}
