.. index:: single: mcp_server_2026_07_28_spec
.. _mcp_server_2026_07_28_spec/0:

.. rst-class:: right

**object**

``mcp_server_2026_07_28_spec``
==============================

MCP 2026-07-28 protocol handler. Returns reply/1, reply_with_progress/2, subscribe/3, accepted, or no_reply outcomes. Does not write to streams; transports render outcomes.

| **Availability:** 
|    ``logtalk_load(mcp_server(loader))``

| **Author:** Paulo Moura
| **Version:** 1:0:0
| **Date:** 2026-09-02

| **Compilation flags:**
|    ``static, context_switching_calls``


| **Implements:**
|    ``public`` :ref:`mcp_server_spec_protocol <mcp_server_spec_protocol/0>`
| **Imports:**
|    ``public`` :ref:`mcp_server_application <mcp_server_application/0>`
| **Uses:**
|    :ref:`json_rpc <json_rpc/0>`
|    :ref:`list <list/0>`
|    :ref:`term_io <term_io/0>`
|    :ref:`user <user/0>`

| **Remarks:**
|    (none)

| **Inherited public predicates:**
|     :ref:`options_protocol/0::check_option/1`  :ref:`options_protocol/0::check_options/1`  :ref:`mcp_server_spec_protocol/0::cleanup/0`  :ref:`options_protocol/0::default_option/1`  :ref:`options_protocol/0::default_options/1`  :ref:`mcp_server_spec_protocol/0::handle_message/3`  :ref:`mcp_server_spec_protocol/0::notify/1`  :ref:`options_protocol/0::option/2`  :ref:`options_protocol/0::option/3`  :ref:`mcp_server_spec_protocol/0::prepare/2`  :ref:`mcp_server_spec_protocol/0::spec/1`  :ref:`mcp_server_application/0::tool_descriptors_to_json/3`  :ref:`options_protocol/0::valid_option/1`  :ref:`options_protocol/0::valid_options/1`  

.. contents::
   :local:
   :backlinks: top

Public predicates
-----------------

.. index:: run_stdio_loop/3
.. _mcp_server_2026_07_28_spec/0::run_stdio_loop/3:

``run_stdio_loop/3``
^^^^^^^^^^^^^^^^^^^^

Stdio read/dispatch loop. Called by the stdio transport.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``run_stdio_loop(Input,Output,Options)``
| **Mode and number of proofs:**
|    ``run_stdio_loop(+stream,+stream,+list)`` - ``one``


------------

.. index:: emit_progress/6
.. _mcp_server_2026_07_28_spec/0::emit_progress/6:

``emit_progress/6``
^^^^^^^^^^^^^^^^^^^

Buffers a notifications/progress event or invokes progress_hook/1 from current options.

| **Compilation flags:**
|    ``static``

| **Template:**
|    ``emit_progress(Token,RequestId,Output,ProgressValue,Total,Message)``
| **Mode and number of proofs:**
|    ``emit_progress(+term,+term,+stream,+number,+number,+atom)`` - ``one``


------------

Protected predicates
--------------------

(no local declarations; see entity ancestors if any)

Private predicates
------------------

.. index:: output_stream_/1
.. _mcp_server_2026_07_28_spec/0::output_stream_/1:

``output_stream_/1``
^^^^^^^^^^^^^^^^^^^^

Current output stream used for stdio rendering and subscription event fan-out.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``output_stream_(Stream)``
| **Mode and number of proofs:**
|    ``output_stream_(-stream)`` - ``zero_or_one``


------------

.. index:: subscription_/3
.. _mcp_server_2026_07_28_spec/0::subscription_/3:

``subscription_/3``
^^^^^^^^^^^^^^^^^^^

Active subscription entry: identifier, opening request id, and filter list.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``subscription_(SubscriptionId,RequestId,Filters)``
| **Mode and number of proofs:**
|    ``subscription_(-atom,-nonvar,-list)`` - ``zero_or_more``


------------

.. index:: running_/0
.. _mcp_server_2026_07_28_spec/0::running_/0:

``running_/0``
^^^^^^^^^^^^^^

Flag set while the stdio server loop is active.

| **Compilation flags:**
|    ``dynamic``

| **Mode and number of proofs:**
|    ``running_`` - ``zero_or_one``


------------

.. index:: reply_outcome_/1
.. _mcp_server_2026_07_28_spec/0::reply_outcome_/1:

``reply_outcome_/1``
^^^^^^^^^^^^^^^^^^^^

Buffered abstract outcome (``reply/1``, ``subscribe/3``, etc.) for the current request.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``reply_outcome_(Outcome)``
| **Mode and number of proofs:**
|    ``reply_outcome_(-nonvar)`` - ``zero_or_one``


------------

.. index:: progress_buffer_/1
.. _mcp_server_2026_07_28_spec/0::progress_buffer_/1:

``progress_buffer_/1``
^^^^^^^^^^^^^^^^^^^^^^

Buffered ``notifications/progress`` events for the current request (before final reply).

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``progress_buffer_(Events)``
| **Mode and number of proofs:**
|    ``progress_buffer_(-list)`` - ``zero_or_one``


------------

.. index:: current_options_/1
.. _mcp_server_2026_07_28_spec/0::current_options_/1:

``current_options_/1``
^^^^^^^^^^^^^^^^^^^^^^

Merged options for the active prepare/handle session.

| **Compilation flags:**
|    ``dynamic``

| **Template:**
|    ``current_options_(Options)``
| **Mode and number of proofs:**
|    ``current_options_(-list)`` - ``zero_or_one``


------------

Operators
---------

(none)