Added MCP server support to agents

README.md

@@ -16,6 +16,7 @@ Make sure you have the following tools installed:
 
 - [argc](https://github.com/sigoden/argc): A bash command-line framework and command runner
 - [jq](https://github.com/jqlang/jq): A JSON processor
+- [yq](https://github.com/mikefarah/yq): A YAML processor
 
 ## Getting Started with [AIChat](https://github.com/sigoden/aichat)
 

agents/demo/README.md

@@ -1,3 +1,28 @@
 # Demo
 
 This agent serves as a demo to guide agent development and showcase various agent capabilities.
+
+It has been modified from the version defined in the base repo to also include details on
+how to integrate MCP servers with agents.
+
+## How MCP Servers Work with Agents
+A new `mcp_tools` field was added to the [index.yaml](./index.yaml) file in order to define and configure MCP support for
+agents.
+
+This field allows you to specify the prefixes of the MCP server functions that are generated according to
+the MCP servers defined in the [mcp.json](../../mcp.json) file under the `mcpServers` key.
+
+When `argc mcp start` is executed, it populates the main [`functions.json`](../../functions.json) file with
+functions that are all prefixed with the name of the corresponding MCP server in the [mcp.json](../../mcp.json).
+
+What this fork does is it allows you to specify which MCP servers you specifically want access to in your agent.
+
+Then, when the `argc mcp start` command is executed, will populate each agent it finds with a non-empty `mcp_tools` field
+with all the generated functions from the main `functions.json`.
+
+When you stop the MCP server with `argc mcp stop`, it will also remove the MCP functions from the agent's `functions.json` file.
+
+This allows you to use the agent either with MCP or without, so you don't necessarily have to remember to start the bridge
+server every time you want to use your agent if you happen to have separate tools or functions defined in the agent's
+tools.sh file.
+

agents/demo/index.yaml

@@ -1,6 +1,11 @@
 name: Demo
 description: An AI agent that demonstrates agent capabilities
 version: 0.1.0
+mcp: true
+mcp_tools:
+  - github
+  - sqlite
+  - git
 instructions: |
   You are a AI agent designed to demonstrate agent capabilities.
 

scripts/mcp.sh

@@ -1,6 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
+readarray -t mcp_enabled_agents < <(find . -type f -name index.yaml -exec sh -c 'yq --exit-status ".mcp_tools | length != 0" "$1" > /dev/null 2>&1 && dirname "$1"' _ {} \;)
 ROOT_DIR="$(cd -- "$( dirname -- "${BASH_SOURCE[0]}" )/.." &> /dev/null && pwd)"
 BIN_DIR="$ROOT_DIR/bin"
 MCP_DIR="$ROOT_DIR/cache/__mcp__"
@@ -115,6 +116,22 @@ merge-functions() {
     else
         printf "%s" "$result"
     fi
+
+    for agent in "${mcp_enabled_agents[@]}"; do
+        if [[ -f "${agent}/functions.json" ]]; then
+            tool_json="$(jq '.' "${agent}/functions.json")"
+            rm -f "${agent}/functions.json"
+        else
+            tool_json='[]'
+        fi
+
+        mcp_function_prefixes="$(yq -o json '.mcp_tools' "${agent}/index.yaml")"
+
+        jq -s 'add | unique' \
+            <(jq '.' <<< "$tool_json") \
+            <(jq --argjson prefixes "$mcp_function_prefixes" 'map(select(.name as $s | $prefixes | any(. as $p | $s | startswith($p))))' "$FUNCTIONS_JSON_PATH") \
+            >> "${agent}/functions.json"
+    done
 }
 
 # @cmd Unmerge mcp tools from functions.json
@@ -130,6 +147,20 @@ recovery-functions() {
     else
         printf "%s" "$result"
     fi
+
+    for agent in "${mcp_enabled_agents[@]}"; do
+        if [[ -f "${agent}/functions.json" ]]; then
+            tool_json="$(jq '.' "${agent}/functions.json")"
+            rm -f "${agent}/functions.json"
+        else
+            tool_json='[]'
+        fi
+
+        mcp_function_prefixes="$(yq -o json '.mcp_tools' "${agent}/index.yaml")"
+
+        jq --argjson prefixes "$mcp_function_prefixes" 'map(select(.name as $s | $prefixes | any(. as $p | $s | startswith($p))| not))' <<< "$tool_json" \
+        >> "${agent}/functions.json"
+    done
 }
 
 # @cmd Generate function declarations for the mcp tools