bump chart

Reviewed-on: #3

.air.toml

@@ -1,80 +1,36 @@
 # .air.toml
-#
-# A configuration file for the 'air' live-reloading tool.
-# This configuration is tailored for a Go project that needs to be run with specific command-line flags
-# and requires graceful handling of system signals like SIGINT and SIGTERM.
-#
-# To use:
-# 1. Install air: `go install github.com/cosmtrek/air@latest`
-# 2. Place this file, renamed to `.air.toml`, in the root of your project.
-# 3. Run `air` from your terminal in the project root.
 
-# The root directory of your project to watch for changes.
+# Root directory of the project
-# '.' indicates the current directory where air is run.
 root = "."
 
-# A temporary directory for air to store its build artifacts.
+# Directory for temporary build artifacts
-# You should add this directory to your .gitignore file.
 tmp_dir = "tmp"
 
 [build]
-# Step 1: Build the Go binary and place it in the tmp directory.
+cmd = "go build -o tmp/main ."
-# Step 2: Copy the configuration file into the tmp directory as well.
+bin = "tmp/main"
-# This ensures all runtime assets are in one place.
+args_bin = ["-config", "config.yaml"]
-cmd = "go build -o ./tmp/main . && cp config.yaml ./tmp/"
 
-# The 'full_bin' command gives us complete control over how the app is run.
+# Extensions to watch
-# We first change the directory to 'tmp' so that the application's working
-# directory is where the binary and its config file are located.
-# Then, we execute the binary, pointing it to the config file in the same directory.
-full_bin = "cd ./tmp && ./main -config config.yaml"
-
-# A list of directories to watch for file changes.
-# Air will recursively watch these directories.
-include_dir = ["."]
-
-# A list of file extensions to watch.
-# Air will restart when any of these files change.
 include_ext = ["go", "toml", "yaml", "yml"]
 
-# A list of directories to ignore.
+# Ignore temp folders and irrelevant dirs
-# It's good practice to ignore temporary directories, vendor folders, and git history.
+exclude_dir = ["tmp", "vendor", ".git", "cmd", "proto"]
-exclude_dir = ["tmp", "vendor", ".git", "proto"]
-
-# A list of specific files to ignore.
-exclude_file = []
-
-# A list of regular expressions to exclude files or directories.
 exclude_regex = ["_test.go"]
 
-# A list of files or directories to watch that are not in the 'include_dir'.
+# Stop process on error and send interrupt for graceful shutdown
-# Useful for watching template files if they are outside your main source directories.
-include_file = []
-
-# This setting is crucial for graceful shutdowns.
-# It stops the running process on a file change before building and restarting.
-# This ensures that your application's shutdown logic is triggered.
 stop_on_error = true
-
-# Send SIGINT (Ctrl+C) to the running process before killing it.
-# This is essential for allowing your application to handle the signal and shut down gracefully.
 send_interrupt = true
-
+kill_delay = 500
-# The delay in milliseconds to wait for the process to shut down gracefully after sending SIGINT.
-# If your app needs more time for cleanup, you can increase this value.
-kill_delay = 500 # ms
 
 [log]
-# Show timestamps in the log output.
 time = true
 
 [color]
-# Customize colors for different parts of the air output.
 main = "magenta"
 watcher = "cyan"
 build = "yellow"
 runner = "green"
 
 [misc]
-# Delete the temporary binary file on exit.
 clean_on_exit = true

.gitignore

@@ -25,3 +25,4 @@ go.work*
 .env
 
 bin/*
+tmp

CHANGELOG.md

@@ -1,3 +1,9 @@
+# v0.6.0
+*   feat: Introduce Model Context Protocol (MCP) server with a demo random fact tool.
+*   feat: Add MCP server configuration file (`contrib/mcpinspector.json`).
+*   deps: Update Go module dependencies, including `bufbuild/protovalidate`, `go-app`, `grpc-gateway`, `googleapis/api`, `grpc`, `protobuf`, `golang.org/x/exp`, and `googleapis/rpc`.
+*   deps: Add new Go module dependencies: `modelcontextprotocol/go-sdk` and `k8s.io/utils`.
+
 # v0.5.0
 
 *   Added OpenTelemetry tracing for application startup.

contrib/mcpinspector.json

@@ -0,0 +1,8 @@
+{
+  "mcpServers": {
+    "default-server": {
+      "type": "streamable-http",
+      "url": "http://localhost:8080/api/mcp/"
+    }
+  }
+}

go.mod

@@ -7,16 +7,17 @@ toolchain go1.24.5
 replace github.com/prometheus/otlptranslator => github.com/prometheus/otlptranslator v0.0.0-20250717125610-8549f4ab4f8f
 
 require (
-	buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.7-20250717185734-6c6e0d3c608e.1
+	buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.8-20250717185734-6c6e0d3c608e.1
-	gitea.libretechconsulting.com/rmcguire/go-app v0.11.0
+	gitea.libretechconsulting.com/rmcguire/go-app v0.12.1
 	github.com/go-resty/resty/v2 v2.16.5
-	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.1
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2
+	github.com/modelcontextprotocol/go-sdk v0.3.0
 	github.com/rs/zerolog v1.34.0
 	go.opentelemetry.io/otel/trace v1.37.0
-	golang.org/x/sys v0.35.0
+	google.golang.org/genproto/googleapis/api v0.0.0-20250826171959-ef028d996bc1
-	google.golang.org/genproto/googleapis/api v0.0.0-20250811230008-5f3141c8851a
+	google.golang.org/grpc v1.75.0
-	google.golang.org/grpc v1.74.2
+	google.golang.org/protobuf v1.36.8
-	google.golang.org/protobuf v1.36.7
+	k8s.io/utils v0.0.0-20250820121507-0af2bda4dd1d
 )
 
 require (
@@ -48,6 +49,7 @@ require (
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/google/cel-go v0.26.0 // indirect
+	github.com/google/jsonschema-go v0.2.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
@@ -59,14 +61,16 @@ require (
 	github.com/prometheus/otlptranslator v0.0.0-20250717125610-8549f4ab4f8f // indirect
 	github.com/prometheus/procfs v0.17.0 // indirect
 	github.com/stoewer/go-strcase v1.3.1 // indirect
+	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.37.0 // indirect
 	go.opentelemetry.io/otel/metric v1.37.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.7.1 // indirect
-	golang.org/x/exp v0.0.0-20250813145105-42675adae3e6 // indirect
+	golang.org/x/exp v0.0.0-20250819193227-8b4c13bb791b // indirect
 	golang.org/x/net v0.43.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
 	golang.org/x/text v0.28.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250811230008-5f3141c8851a // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250826171959-ef028d996bc1 // indirect
 	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 // indirect
 )
 

go.sum

@@ -1,17 +1,15 @@
-buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.6-20250717185734-6c6e0d3c608e.1 h1:Lg6klmCi3v7VvpqeeLEER9/m5S8y9e9DjhqQnSCNy4k=
-buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.6-20250717185734-6c6e0d3c608e.1/go.mod h1:avRlCjnFzl98VPaeCtJ24RrV/wwHFzB8sWXhj26+n/U=
 buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.7-20250717185734-6c6e0d3c608e.1 h1:/AZH8sVB6LHv8G+hZlAMCP31NevnesHwYgnlgS5Vt14=
 buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.7-20250717185734-6c6e0d3c608e.1/go.mod h1:eva/VCrd8X7xuJw+JtwCEyrCKiRRASukFqmirnWBvFU=
+buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.8-20250717185734-6c6e0d3c608e.1 h1:sjY1k5uszbIZfv11HO2keV4SLhNA47SabPO886v7Rvo=
+buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.8-20250717185734-6c6e0d3c608e.1/go.mod h1:8EQ5GzyGJQ5tEIwMSxCl8RKJYsjCpAwkdcENoioXT6g=
 buf.build/go/protovalidate v0.14.0 h1:kr/rC/no+DtRyYX+8KXLDxNnI1rINz0imk5K44ZpZ3A=
 buf.build/go/protovalidate v0.14.0/go.mod h1:+F/oISho9MO7gJQNYC2VWLzcO1fTPmaTA08SDYJZncA=
 cel.dev/expr v0.24.0 h1:56OvJKSH3hDGL0ml5uSxZmz3/3Pq4tJ+fb1unVLAFcY=
 cel.dev/expr v0.24.0/go.mod h1:hLPLo1W4QUmuYdA72RBX06QTs6MXw941piREPl3Yfiw=
-gitea.libretechconsulting.com/rmcguire/go-app v0.10.0 h1:Cx3fTaNEEAZQUn6zeg2yXj0CnkBLjf2yrGWX8f/uHzM=
-gitea.libretechconsulting.com/rmcguire/go-app v0.10.0/go.mod h1:26ZbEKfhPU4XFWltysJDMhaLJk6qVrUFxhrkoFmv33I=
-gitea.libretechconsulting.com/rmcguire/go-app v0.10.2 h1:dwTvWWA2MJUuf8xlakZjqCGZamN3oEVmTLJuCCAQIlc=
-gitea.libretechconsulting.com/rmcguire/go-app v0.10.2/go.mod h1:pGjVInL1iiA54lJkQ+V/NGa1RzqVpE6firhfhq7XUmw=
 gitea.libretechconsulting.com/rmcguire/go-app v0.11.0 h1:IQmZCnr1XFVaw6TvhBmPTfAnvFJMjEcOylSZcCSen5w=
 gitea.libretechconsulting.com/rmcguire/go-app v0.11.0/go.mod h1:T8K2vbmt0mApScJDGqfmNlvX5gdJSImjArUMpgfYs8U=
+gitea.libretechconsulting.com/rmcguire/go-app v0.12.1 h1:OWXz8S3NAlBAjIxY7G6ydO18t5/JiJ8f3EMKDeppEg8=
+gitea.libretechconsulting.com/rmcguire/go-app v0.12.1/go.mod h1:T8K2vbmt0mApScJDGqfmNlvX5gdJSImjArUMpgfYs8U=
 github.com/antlr4-go/antlr/v4 v4.13.1 h1:SqQKkuVZ+zWkMMNkjy5FZe5mr5WURWnlpmOuzYWrPrQ=
 github.com/antlr4-go/antlr/v4 v4.13.1/go.mod h1:GKmUxMtwp6ZgGwZSva4eWPC5mS6vUAmOABFgjdkM7Nw=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -22,8 +20,6 @@ github.com/bool64/shared v0.1.5 h1:fp3eUhBsrSjNCQPcSdQqZxxh9bBwrYiZ+zOKFkM0/2E=
 github.com/bool64/shared v0.1.5/go.mod h1:081yz68YC9jeFB3+Bbmno2RFWvGKv1lPKkMP6MHJlPs=
 github.com/caarlos0/env/v11 v11.3.1 h1:cArPWC15hWmEt+gWk7YBi7lEXTXCvpaSdCiZE2X5mCA=
 github.com/caarlos0/env/v11 v11.3.1/go.mod h1:qupehSf/Y0TUTsxKywqRt/vJjN5nz6vauiYEUUr8P4U=
-github.com/cenkalti/backoff/v5 v5.0.2 h1:rIfFVxEf1QsI7E1ZHfp/B4DF/6QBAUhmgkxc0H7Zss8=
-github.com/cenkalti/backoff/v5 v5.0.2/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
 github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
@@ -48,6 +44,8 @@ github.com/google/cel-go v0.26.0 h1:DPGjXackMpJWH680oGY4lZhYjIameYmR+/6RBdDGmaI=
 github.com/google/cel-go v0.26.0/go.mod h1:A9O8OU9rdvrK5MQyrqfIxo1a0u4g3sF8KB6PUIaryMM=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/google/jsonschema-go v0.2.0 h1:Uh19091iHC56//WOsAd1oRg6yy1P9BpSvpjOL6RcjLQ=
+github.com/google/jsonschema-go v0.2.0/go.mod h1:r5quNTdLOYEz95Ru18zA0ydNbBuYoo9tgaYcxEYhJVE=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc h1:GN2Lv3MGO7AS6PrRoT6yV5+wkrOpcszoIsO4+4ds248=
@@ -56,6 +54,8 @@ github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.2 h1:sGm2vDRFUrQJO/Veii4h4z
 github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.3.2/go.mod h1:wd1YpapPLivG6nQgbf7ZkG1hhSOXDhhn4MLTknx2aAc=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.1 h1:X5VWvz21y3gzm9Nw/kaUeku/1+uBhcekkmy4IkffJww=
 github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.1/go.mod h1:Zanoh4+gvIgluNqcfMVTJueD4wSS5hT7zTt4Mrutd90=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 h1:8Tjv8EJ+pM1xP8mK6egEbD1OgnVTyacbefKhmbLhIhU=
+github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2/go.mod h1:pkJQ2tZHJ0aFOVEEot6oZmaVEZcRme73eIFmhiVuRWs=
 github.com/iancoleman/orderedmap v0.3.0 h1:5cbR2grmZR/DiVt+VJopEhtVs9YGInGIxAoMJn+Ichc=
 github.com/iancoleman/orderedmap v0.3.0/go.mod h1:XuLcCUkdL5owUCQeF2Ue9uuw1EptkJDkXXS7VoV7XGE=
 github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
@@ -73,13 +73,13 @@ github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/modelcontextprotocol/go-sdk v0.3.0 h1:/1XC6+PpdKfE4CuFJz8/goo0An31bu8n8G8d3BkeJoY=
+github.com/modelcontextprotocol/go-sdk v0.3.0/go.mod h1:71VUZVa8LL6WARvSgLJ7DMpDWSeomT4uBv8g97mGBvo=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.22.0 h1:rb93p9lokFEsctTys46VnV1kLCDpVZ0a/Y92Vm0Zc6Q=
-github.com/prometheus/client_golang v1.22.0/go.mod h1:R7ljNsLXhuQXYZYtw6GAE9AZg8Y7vEW5scdCXrWRXC0=
 github.com/prometheus/client_golang v1.23.0 h1:ust4zpdl9r4trLY/gSjlm07PuiBq2ynaXXlptpfy8Uc=
 github.com/prometheus/client_golang v1.23.0/go.mod h1:i/o0R9ByOnHX0McrTMTyhYvKE4haaf2mW08I+jGAjEE=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
@@ -113,6 +113,8 @@ github.com/swaggest/jsonschema-go v0.3.78 h1:5+YFQrLxOR8z6CHvgtZc42WRy/Q9zRQQ4Ho
 github.com/swaggest/jsonschema-go v0.3.78/go.mod h1:4nniXBuE+FIGkOGuidjOINMH7OEqZK3HCSbfDuLRI0g=
 github.com/swaggest/refl v1.4.0 h1:CftOSdTqRqs100xpFOT/Rifss5xBV/CT0S/FN60Xe9k=
 github.com/swaggest/refl v1.4.0/go.mod h1:4uUVFVfPJ0NSX9FPwMPspeHos9wPFlCMGoPRllUbpvA=
+github.com/yosida95/uritemplate/v3 v3.0.2 h1:Ed3Oyj9yrmi9087+NczuL5BwkIc4wvTb5zIM+UJPGz4=
+github.com/yosida95/uritemplate/v3 v3.0.2/go.mod h1:ILOh0sOhIJR3+L/8afwt/kE++YT040gmv5BQTMR2HP4=
 github.com/yudai/gojsondiff v1.0.0 h1:27cbfqXLVEJ1o8I6v3y9lg8Ydm53EKqHXAOMxEGlCOA=
 github.com/yudai/gojsondiff v1.0.0/go.mod h1:AY32+k2cwILAkW1fbgxQ5mUmMiZFgLIV+FBNExI05xg=
 github.com/yudai/golcs v0.0.0-20170316035057-ecda9a501e82 h1:BHyfKlQyqbsFN5p3IfnEUduWvb9is428/nNb5L3U01M=
@@ -145,54 +147,50 @@ go.opentelemetry.io/otel/sdk/metric v1.37.0 h1:90lI228XrB9jCMuSdA0673aubgRobVZFh
 go.opentelemetry.io/otel/sdk/metric v1.37.0/go.mod h1:cNen4ZWfiD37l5NhS+Keb5RXVWZWpRE+9WyVCpbo5ps=
 go.opentelemetry.io/otel/trace v1.37.0 h1:HLdcFNbRQBE2imdSEgm/kwqmQj1Or1l/7bW6mxVK7z4=
 go.opentelemetry.io/otel/trace v1.37.0/go.mod h1:TlgrlQ+PtQO5XFerSPUYG0JSgGyryXewPGyayAWSBS0=
-go.opentelemetry.io/proto/otlp v1.7.0 h1:jX1VolD6nHuFzOYso2E73H85i92Mv8JQYk0K9vz09os=
-go.opentelemetry.io/proto/otlp v1.7.0/go.mod h1:fSKjH6YJ7HDlwzltzyMj036AJ3ejJLCgCSHGj4efDDo=
 go.opentelemetry.io/proto/otlp v1.7.1 h1:gTOMpGDb0WTBOP8JaO72iL3auEZhVmAQg4ipjOVAtj4=
 go.opentelemetry.io/proto/otlp v1.7.1/go.mod h1:b2rVh6rfI/s2pHWNlB7ILJcRALpcNDzKhACevjI+ZnE=
 go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-golang.org/x/exp v0.0.0-20250718183923-645b1fa84792 h1:R9PFI6EUdfVKgwKjZef7QIwGcBKu86OEFpJ9nUEP2l4=
-golang.org/x/exp v0.0.0-20250718183923-645b1fa84792/go.mod h1:A+z0yzpGtvnG90cToK5n2tu8UJVP2XUATh+r+sfOOOc=
 golang.org/x/exp v0.0.0-20250813145105-42675adae3e6 h1:SbTAbRFnd5kjQXbczszQ0hdk3ctwYf3qBNH9jIsGclE=
 golang.org/x/exp v0.0.0-20250813145105-42675adae3e6/go.mod h1:4QTo5u+SEIbbKW1RacMZq1YEfOBqeXa19JeshGi+zc4=
-golang.org/x/net v0.42.0 h1:jzkYrhi3YQWD6MLBJcsklgQsoAcw89EcZbJw8Z614hs=
+golang.org/x/exp v0.0.0-20250819193227-8b4c13bb791b h1:DXr+pvt3nC887026GRP39Ej11UATqWDmWuS99x26cD0=
-golang.org/x/net v0.42.0/go.mod h1:FF1RA5d3u7nAYA4z2TkclSCKh68eSXtiFwcWQpPXdt8=
+golang.org/x/exp v0.0.0-20250819193227-8b4c13bb791b/go.mod h1:4QTo5u+SEIbbKW1RacMZq1YEfOBqeXa19JeshGi+zc4=
 golang.org/x/net v0.43.0 h1:lat02VYK2j4aLzMzecihNvTlJNQUq316m2Mr9rnM6YE=
 golang.org/x/net v0.43.0/go.mod h1:vhO1fvI4dGsIjh73sWfUVjj3N7CA9WkKJNQm2svM6Jg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.34.0 h1:H5Y5sJ2L2JRdyv7ROF1he/lPdvFsd0mJHFw2ThKHxLA=
-golang.org/x/sys v0.34.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
 golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
 golang.org/x/sys v0.35.0/go.mod h1:BJP2sWEmIv4KK5OTEluFJCKSidICx8ciO85XgH3Ak8k=
-golang.org/x/text v0.27.0 h1:4fGWRpyh641NLlecmyl4LOe6yDdfaYNrGb2zdfo4JV4=
-golang.org/x/text v0.27.0/go.mod h1:1D28KMCvyooCX9hBiosv5Tz/+YLxj0j7XhWjpSUF7CU=
 golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
 golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
 golang.org/x/time v0.6.0 h1:eTDhh4ZXt5Qf0augr54TN6suAUudPcawVZeIAPU7D4U=
 golang.org/x/time v0.6.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
-google.golang.org/genproto/googleapis/api v0.0.0-20250721164621-a45f3dfb1074 h1:mVXdvnmR3S3BQOqHECm9NGMjYiRtEvDYcqAqedTXY6s=
+golang.org/x/tools v0.36.0 h1:kWS0uv/zsvHEle1LbV5LE8QujrxB3wfQyxHfhOk0Qkg=
-google.golang.org/genproto/googleapis/api v0.0.0-20250721164621-a45f3dfb1074/go.mod h1:vYFwMYFbmA8vl6Z/krj/h7+U/AqpHknwJX4Uqgfyc7I=
+golang.org/x/tools v0.36.0/go.mod h1:WBDiHKJK8YgLHlcQPYQzNCkUxUypCaa5ZegCVutKm+s=
 google.golang.org/genproto/googleapis/api v0.0.0-20250811230008-5f3141c8851a h1:DMCgtIAIQGZqJXMVzJF4MV8BlWoJh2ZuFiRdAleyr58=
 google.golang.org/genproto/googleapis/api v0.0.0-20250811230008-5f3141c8851a/go.mod h1:y2yVLIE/CSMCPXaHnSKXxu1spLPnglFLegmgdY23uuE=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250721164621-a45f3dfb1074 h1:qJW29YvkiJmXOYMu5Tf8lyrTp3dOS+K4z6IixtLaCf8=
+google.golang.org/genproto/googleapis/api v0.0.0-20250826171959-ef028d996bc1 h1:APHvLLYBhtZvsbnpkfknDZ7NyH4z5+ub/I0u8L3Oz6g=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20250721164621-a45f3dfb1074/go.mod h1:qQ0YXyHHx3XkvlzUtpXDkS29lDSafHMZBAZDc03LQ3A=
+google.golang.org/genproto/googleapis/api v0.0.0-20250826171959-ef028d996bc1/go.mod h1:xUjFWUnWDpZ/C0Gu0qloASKFb6f8/QXiiXhSPFsD668=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250811230008-5f3141c8851a h1:tPE/Kp+x9dMSwUm/uM0JKK0IfdiJkwAbSMSeZBXXJXc=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20250811230008-5f3141c8851a/go.mod h1:gw1tLEfykwDz2ET4a12jcXt4couGAm7IwsVaTy0Sflo=
-google.golang.org/grpc v1.73.0 h1:VIWSmpI2MegBtTuFt5/JWy2oXxtjJ/e89Z70ImfD2ok=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250826171959-ef028d996bc1 h1:pmJpJEvT846VzausCQ5d7KreSROcDqmO388w5YbnltA=
-google.golang.org/grpc v1.73.0/go.mod h1:50sbHOUqWoCQGI8V2HQLJM0B+LMlIUjNSZmow7EVBQc=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250826171959-ef028d996bc1/go.mod h1:GmFNa4BdJZ2a8G+wCe9Bg3wwThLrJun751XstdJt5Og=
 google.golang.org/grpc v1.74.2 h1:WoosgB65DlWVC9FqI82dGsZhWFNBSLjQ84bjROOpMu4=
 google.golang.org/grpc v1.74.2/go.mod h1:CtQ+BGjaAIXHs/5YS3i473GqwBBa1zGQNevxdeBEXrM=
+google.golang.org/grpc v1.75.0 h1:+TW+dqTd2Biwe6KKfhE5JpiYIBWq865PhKGSXiivqt4=
+google.golang.org/grpc v1.75.0/go.mod h1:JtPAzKiq4v1xcAB2hydNlWI2RnF85XXcV0mhKXr2ecQ=
 google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 h1:F29+wU6Ee6qgu9TddPgooOdaqsxTMunOoj8KA5yuS5A=
 google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1/go.mod h1:5KF+wpkbTSbGcR9zteSqZV6fqFOWBl4Yde8En8MryZA=
-google.golang.org/protobuf v1.36.6 h1:z1NpPI8ku2WgiWnf+t9wTPsn6eP1L7ksHUlkfLvd9xY=
-google.golang.org/protobuf v1.36.6/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
 google.golang.org/protobuf v1.36.7 h1:IgrO7UwFQGJdRNXH/sQux4R1Dj1WAKcLElzeeRaXV2A=
 google.golang.org/protobuf v1.36.7/go.mod h1:jduwjTPXsFjZGTmRluh+L6NjiWu7pchiJ2/5YcXBHnY=
+google.golang.org/protobuf v1.36.8 h1:xHScyCOEuuwZEc6UtSOvPbAT4zRh0xcNRYekJwfqyMc=
+google.golang.org/protobuf v1.36.8/go.mod h1:fuxRtAxBytpl4zzqUh6/eyUujkJdNiuEkXntxiD/uRU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+k8s.io/utils v0.0.0-20250820121507-0af2bda4dd1d h1:wAhiDyZ4Tdtt7e46e9M5ZSAJ/MnPGPs+Ki1gHw4w1R0=
+k8s.io/utils v0.0.0-20250820121507-0af2bda4dd1d/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=

helm/Chart.yaml

@@ -15,13 +15,13 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.1.1
+version: 0.1.2
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 # It is recommended to use it with quotes.
-appVersion: "v0.5.0"
+appVersion: "v0.6.0"
 
 dependencies:
   - name: hull

main.go

@@ -16,13 +16,13 @@ import (
 	"os"
 	"os/signal"
 	"sync"
+	"syscall"
 	"time"
 
 	"github.com/rs/zerolog"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/codes"
 	"go.opentelemetry.io/otel/trace"
-	"golang.org/x/sys/unix"
 
 	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/app"
 	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/otel"
@@ -50,7 +50,7 @@ var (
 )
 
 func main() {
-	ctx, cncl := signal.NotifyContext(context.Background(), os.Interrupt, unix.SIGTERM)
+	ctx, cncl := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT)
 	defer cncl()
 
 	// Load configuration and setup logging. The go-app framework
@@ -61,7 +61,7 @@ func main() {
 	// Print schema if that's all we have to do
 	if flagSchema {
 		printSchema()
-		os.Exit(1)
+		os.Exit(0)
 	}
 
 	// Prepare app
@@ -96,6 +96,11 @@ func main() {
 	app.GRPC = grpcSvcs
 	app.HTTP = httpSvcs
 
+	span.SetAttributes(
+		attribute.Int("grpcServices", len(app.GRPC.Services)),
+		attribute.Int("httpServices", len(app.HTTP.Funcs)+len(app.HTTP.Handlers)),
+	)
+
 	// Launch app
 	app.MustRun()
 

pkg/demo/demo.go

@@ -12,6 +12,7 @@ import (
 	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/config"
 	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/demo/demogrpc"
 	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/demo/demohttp"
+	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/demo/demomcp"
 	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/service"
 )
 
@@ -20,6 +21,7 @@ type DemoService struct {
 	config *config.ServiceConfig
 	http   *demohttp.DemoHTTPServer
 	grpc   *demogrpc.DemoGRPCServer
+	mcp    *demomcp.DemoMCPServer
 }
 
 func (d *DemoService) Init(ctx context.Context, config *config.ServiceConfig,
@@ -31,6 +33,7 @@ func (d *DemoService) Init(ctx context.Context, config *config.ServiceConfig,
 	// This is, after all, a demo app. Just implement the interface.
 	d.http = demohttp.NewDemoHTTPServer(ctx, config)
 	d.grpc = demogrpc.NewDemoGRPCServer(ctx, config)
+	d.mcp = demomcp.NewDemoMCPServer(ctx, config)
 
 	// TODO: This should actually do shutdown stuff
 	return func(_ context.Context) (string, error) {
@@ -49,6 +52,7 @@ func (d *DemoService) GetHTTP() *optshttp.AppHTTP {
 	return &optshttp.AppHTTP{
 		Ctx:          d.ctx,
 		Funcs:        d.http.GetHandleFuncs(),
+		Handlers:     d.mcp.GetHandlers(),
 		HealthChecks: d.http.GetHealthCheckFuncs(),
 	}
 }

pkg/demo/demomcp/server.go

@@ -0,0 +1,70 @@
+/*
+Package demomcp contains a simple reference implementation of returning a
+HTTPHandler for an MCP server with a single tool used to retrieve random facts
+*/
+package demomcp
+
+import (
+	"context"
+	"net/http"
+
+	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/srv/http/opts"
+	"github.com/modelcontextprotocol/go-sdk/mcp"
+	"github.com/rs/zerolog"
+
+	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/config"
+	"gitea.libretechconsulting.com/rmcguire/go-server-with-otel/pkg/demo/demogrpc"
+)
+
+var DemoMCPImpl = &mcp.Implementation{
+	Name:  "Demo MCP Server",
+	Title: "Demo MCP",
+}
+
+type DemoMCPServer struct {
+	ctx      context.Context
+	cfg      *config.ServiceConfig
+	log      *zerolog.Logger
+	server   *mcp.Server
+	demoGRPC *demogrpc.DemoGRPCServer
+}
+
+func NewDemoMCPServer(ctx context.Context, cfg *config.ServiceConfig) *DemoMCPServer {
+	return &DemoMCPServer{
+		ctx:      ctx,
+		cfg:      cfg,
+		log:      zerolog.Ctx(ctx),
+		demoGRPC: demogrpc.NewDemoGRPCServer(ctx, cfg),
+		server: mcp.NewServer(DemoMCPImpl, &mcp.ServerOptions{
+			Instructions: "Call this demo MCP tool if the user asks useless questions or wants a random fact",
+			HasTools:     true,
+		}),
+	}
+}
+
+func (d *DemoMCPServer) GetHandlers() []opts.HTTPHandler {
+	// NOTE: Add other tools here
+	d.addDemoRandomFactTool()
+
+	demoHandler := mcp.NewStreamableHTTPHandler(func(*http.Request) *mcp.Server {
+		return d.server
+	}, &mcp.StreamableHTTPOptions{})
+
+	d.log.Debug().Msg("Demo MCP Tool Ready")
+
+	return []opts.HTTPHandler{
+		{
+			Prefix:  "/api/mcp",
+			Handler: demoHandler,
+		},
+	}
+}
+
+func (d *DemoMCPServer) GetHealthCheckFuncs() []opts.HealthCheckFunc {
+	return []opts.HealthCheckFunc{
+		func(ctx context.Context) error {
+			// TODO: Implement real health checks
+			return nil
+		},
+	}
+}

pkg/demo/demomcp/tool.go

@@ -0,0 +1,60 @@
+package demomcp
+
+import (
+	"context"
+
+	"github.com/modelcontextprotocol/go-sdk/mcp"
+	"k8s.io/utils/ptr"
+
+	demo "gitea.libretechconsulting.com/rmcguire/go-server-with-otel/api/demo/app/v1alpha1"
+)
+
+var DemoTool = &mcp.Tool{
+	Name:        "Demo Tool",
+	Title:       "Demo Random Fact Tool",
+	Description: "Returns a random fact for demo or boredom purposes",
+	Annotations: &mcp.ToolAnnotations{
+		ReadOnlyHint:  true,
+		OpenWorldHint: ptr.To(true),
+	},
+}
+
+type DemoToolParams struct {
+	Language string `json:"language,omitempty" jsonschema:"Random Fact Language Abbreviation (e.g. en)"`
+}
+
+func (d *DemoMCPServer) addDemoRandomFactTool() {
+	d.server.AddTool(
+		mcp.ToolFor(DemoTool, d.demoToolHandler),
+	)
+}
+
+func (d *DemoMCPServer) demoToolHandler(ctx context.Context, req *mcp.CallToolRequest, args *DemoToolParams) (
+	*mcp.CallToolResult, any, error,
+) {
+	d.log.Debug().Str("language", args.Language).Msg("demo fact tool called")
+
+	fact, err := d.demoGRPC.GetDemo(ctx, &demo.GetDemoRequest{
+		Language: &args.Language,
+	})
+	if err != nil {
+		return &mcp.CallToolResult{
+			IsError: true,
+			Meta: mcp.Meta{
+				"error": err,
+			},
+		}, nil, err
+	}
+
+	return &mcp.CallToolResult{
+		Meta: mcp.Meta{
+			"language": fact.GetLanguage(),
+			"source":   fact.GetSource(),
+		},
+		Content: []mcp.Content{
+			&mcp.TextContent{
+				Text: fact.GetFact(),
+			},
+		},
+	}, nil, nil
+}