Tool calls!

README.md

@@ -1,43 +1,4 @@
-# Mcp
+# Ruby MCP Client Implementation
 
-TODO: Delete this and the text below, and describe your gem
-
-Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/mcp`. To experiment with that code, run `bin/console` for an interactive prompt.
-
-## Installation
-
-TODO: Replace `UPDATE_WITH_YOUR_GEM_NAME_IMMEDIATELY_AFTER_RELEASE_TO_RUBYGEMS_ORG` with your gem name right after releasing it to RubyGems.org. Please do not do it earlier due to security reasons. Alternatively, replace this section with instructions to install your gem from git if you don't plan to release to RubyGems.org.
-
-Install the gem and add to the application's Gemfile by executing:
-
-```bash
-bundle add UPDATE_WITH_YOUR_GEM_NAME_IMMEDIATELY_AFTER_RELEASE_TO_RUBYGEMS_ORG
-```
-
-If bundler is not being used to manage dependencies, install the gem by executing:
-
-```bash
-gem install UPDATE_WITH_YOUR_GEM_NAME_IMMEDIATELY_AFTER_RELEASE_TO_RUBYGEMS_ORG
-```
-
-## Usage
-
-TODO: Write usage instructions here
-
-## Development
-
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
-
-To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and the created tag, and push the `.gem` file to [rubygems.org](https://rubygems.org).
-
-## Contributing
-
-Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/mcp. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [code of conduct](https://github.com/[USERNAME]/mcp/blob/main/CODE_OF_CONDUCT.md).
-
-## License
-
-The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
-
-## Code of Conduct
-
-Everyone interacting in the Mcp project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/[USERNAME]/mcp/blob/main/CODE_OF_CONDUCT.md).
+This is a small MCP client implementation for ruby. It is probably not what you want to actually
+use as it needlessly wraps a rust implementation of JSON-RPC as a learning exercise.

ext/mcp/Cargo.lock

@@ -79,7 +79,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "regex",
- "rustc-hash",
+ "rustc-hash 1.1.0",
  "shlex",
  "syn",
 ]
@@ -122,17 +122,6 @@ dependencies = [
  "libloading",
 ]
 
-[[package]]
-name = "displaydoc"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -140,12 +129,46 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
 [[package]]
-name = "form_urlencoded"
-version = "1.2.1"
+name = "fnv"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e13624c2627564efccf4934284bdd98cbaa14e79b0b5a141218e507b3a823456"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
+name = "futures-core"
+version = "0.3.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05f29059c0c2090612e8d742178b0580d2dc940c837851ad723096f87af6663e"
+
+[[package]]
+name = "futures-sink"
+version = "0.3.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e575fab7d1e0dcb8d0c7bcf9a63ee213816ab51902e6d244a95819acacf1d4f7"
+
+[[package]]
+name = "futures-task"
+version = "0.3.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f90f7dce0722e95104fcb095585910c0977252f286e354b5e3bd38902cd99988"
+
+[[package]]
+name = "futures-timer"
+version = "3.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f288b0a4f20f9a56b5d1da57e2227c661b7b16168e2f72365f57b63326e29b24"
+
+[[package]]
+name = "futures-util"
+version = "0.3.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9fa08315bb612088cc391249efdc3bc77536f16c91f6cf495e6fbe85b20a4a81"
 dependencies = [
- "percent-encoding",
+ "futures-core",
+ "futures-sink",
+ "futures-task",
+ "pin-project-lite",
+ "pin-utils",
 ]
 
 [[package]]
@@ -161,142 +184,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a8d1add55171497b4705a648c6b583acafb01d58050a51727785f0b2c8e0a2b2"
 
 [[package]]
-name = "icu_collections"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db2fa452206ebee18c4b5c2274dbf1de17008e874b4dc4f0aea9d01ca79e4526"
-dependencies = [
- "displaydoc",
- "yoke",
- "zerofrom",
- "zerovec",
-]
-
-[[package]]
-name = "icu_locid"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13acbb8371917fc971be86fc8057c41a64b521c184808a698c02acc242dbf637"
-dependencies = [
- "displaydoc",
- "litemap",
- "tinystr",
- "writeable",
- "zerovec",
-]
-
-[[package]]
-name = "icu_locid_transform"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01d11ac35de8e40fdeda00d9e1e9d92525f3f9d887cdd7aa81d727596788b54e"
-dependencies = [
- "displaydoc",
- "icu_locid",
- "icu_locid_transform_data",
- "icu_provider",
- "tinystr",
- "zerovec",
-]
-
-[[package]]
-name = "icu_locid_transform_data"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fdc8ff3388f852bede6b579ad4e978ab004f139284d7b28715f773507b946f6e"
-
-[[package]]
-name = "icu_normalizer"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19ce3e0da2ec68599d193c93d088142efd7f9c5d6fc9b803774855747dc6a84f"
-dependencies = [
- "displaydoc",
- "icu_collections",
- "icu_normalizer_data",
- "icu_properties",
- "icu_provider",
- "smallvec",
- "utf16_iter",
- "utf8_iter",
- "write16",
- "zerovec",
-]
-
-[[package]]
-name = "icu_normalizer_data"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8cafbf7aa791e9b22bec55a167906f9e1215fd475cd22adfcf660e03e989516"
-
-[[package]]
-name = "icu_properties"
-version = "1.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93d6020766cfc6302c15dbbc9c8778c37e62c14427cb7f6e601d849e092aeef5"
-dependencies = [
- "displaydoc",
- "icu_collections",
- "icu_locid_transform",
- "icu_properties_data",
- "icu_provider",
- "tinystr",
- "zerovec",
-]
-
-[[package]]
-name = "icu_properties_data"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67a8effbc3dd3e4ba1afa8ad918d5684b8868b3b26500753effea8d2eed19569"
-
-[[package]]
-name = "icu_provider"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ed421c8a8ef78d3e2dbc98a973be2f3770cb42b606e3ab18d6237c4dfde68d9"
-dependencies = [
- "displaydoc",
- "icu_locid",
- "icu_provider_macros",
- "stable_deref_trait",
- "tinystr",
- "writeable",
- "yoke",
- "zerofrom",
- "zerovec",
-]
-
-[[package]]
-name = "icu_provider_macros"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ec89e9337638ecdc08744df490b221a7399bf8d164eb52a665454e60e075ad6"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "idna"
-version = "1.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "686f825264d630750a544639377bae737628043f20d38bbc029e8f29ea968a7e"
-dependencies = [
- "idna_adapter",
- "smallvec",
- "utf8_iter",
-]
-
-[[package]]
-name = "idna_adapter"
+name = "http"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "daca1df1c957320b2cf139ac61e7bd64fed304c5040df000a745aa1de3b4ef71"
+checksum = "f16ca2af56261c99fba8bac40a10251ce8188205a4c448fbb745a2e4daa76fea"
 dependencies = [
- "icu_normalizer",
- "icu_properties",
+ "bytes",
+ "fnv",
+ "itoa",
 ]
 
 [[package]]
@@ -314,6 +209,48 @@ version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
+[[package]]
+name = "jsonrpsee"
+version = "0.24.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "834af00800e962dee8f7bfc0f60601de215e73e78e5497d733a2919da837d3c8"
+dependencies = [
+ "jsonrpsee-core",
+ "tracing",
+]
+
+[[package]]
+name = "jsonrpsee-core"
+version = "0.24.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76637f6294b04e747d68e69336ef839a3493ca62b35bf488ead525f7da75c5bb"
+dependencies = [
+ "async-trait",
+ "futures-timer",
+ "futures-util",
+ "jsonrpsee-types",
+ "pin-project",
+ "rustc-hash 2.1.1",
+ "serde",
+ "serde_json",
+ "thiserror",
+ "tokio",
+ "tokio-stream",
+ "tracing",
+]
+
+[[package]]
+name = "jsonrpsee-types"
+version = "0.24.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ddb81adb1a5ae9182df379e374a79e24e992334e7346af4d065ae5b2acb8d4c6"
+dependencies = [
+ "http",
+ "serde",
+ "serde_json",
+ "thiserror",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -342,12 +279,6 @@ dependencies = [
  "windows-targets",
 ]
 
-[[package]]
-name = "litemap"
-version = "0.7.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23fb14cb19457329c82206317a5663005a4d404783dc74f4252769b0d5f42856"
-
 [[package]]
 name = "lock_api"
 version = "0.4.12"
@@ -358,6 +289,12 @@ dependencies = [
  "scopeguard",
 ]
 
+[[package]]
+name = "log"
+version = "0.4.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "30bde2b3dc3671ae49d8e2e9f044c7c005836e7a023ee57cffa25ab82764bb9e"
+
 [[package]]
 name = "magnus"
 version = "0.7.1"
@@ -382,26 +319,28 @@ dependencies = [
 ]
 
 [[package]]
-name = "mcp"
+name = "matchers"
 version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
 dependencies = [
- "magnus",
- "mcp-sdk",
+ "regex-automata 0.1.10",
 ]
 
 [[package]]
-name = "mcp-sdk"
-version = "0.0.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95ec0bb3052aef37a76f074f185d50bb165662c1f5beccab6719bc0386a4fd29"
+name = "mcp"
+version = "0.1.0"
 dependencies = [
  "anyhow",
- "async-trait",
+ "jsonrpsee",
+ "magnus",
+ "once_cell",
  "serde",
  "serde_json",
+ "serde_magnus",
  "tokio",
  "tracing",
- "url",
+ "tracing-subscriber",
 ]
 
 [[package]]
@@ -446,6 +385,16 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "nu-ansi-term"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77a8165726e8236064dbb45459242600304b42a5ea24ee2948e18e023bf7ba84"
+dependencies = [
+ "overload",
+ "winapi",
+]
+
 [[package]]
 name = "object"
 version = "0.36.7"
@@ -461,6 +410,12 @@ version = "1.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d75b0bedcc4fe52caa0e03d9f1151a323e4aa5e2d78ba3580400cd3c9e2bc4bc"
 
+[[package]]
+name = "overload"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -485,10 +440,24 @@ dependencies = [
 ]
 
 [[package]]
-name = "percent-encoding"
-version = "2.3.1"
+name = "pin-project"
+version = "1.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3148f5046208a5d56bcfc03053e3ca6334e51da8dfb19b6cdc8b306fae3283e"
+checksum = "dfe2e71e1471fe07709406bf725f710b02927c9c54b2b5b2ec0e8087d97c327d"
+dependencies = [
+ "pin-project-internal",
+]
+
+[[package]]
+name = "pin-project-internal"
+version = "1.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6e859e6e5bd50440ab63c47e3ebabc90f26251f7c73c3d3e837b74a1cc3fa67"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
 
 [[package]]
 name = "pin-project-lite"
@@ -496,6 +465,12 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3b3cff922bd51709b605d9ead9aa71031d81447142d828eb4a6eba76fe619f9b"
 
+[[package]]
+name = "pin-utils"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.94"
@@ -561,8 +536,17 @@ checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-automata",
- "regex-syntax",
+ "regex-automata 0.4.9",
+ "regex-syntax 0.8.5",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax 0.6.29",
 ]
 
 [[package]]
@@ -573,9 +557,15 @@ checksum = "809e8dc61f6de73b46c85f4c96486310fe304c434cfa43669d7b40f711150908"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-syntax",
+ "regex-syntax 0.8.5",
 ]
 
+[[package]]
+name = "regex-syntax"
+version = "0.6.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f162c6dd7b008981e4d40210aca20b4bd0f9b60ca9271061b07f78537722f2e1"
+
 [[package]]
 name = "regex-syntax"
 version = "0.8.5"
@@ -594,6 +584,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
+[[package]]
+name = "rustc-hash"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
+
 [[package]]
 name = "ryu"
 version = "1.0.20"
@@ -644,6 +640,26 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_magnus"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51b8b945a2dadb221f1c5490cfb411cab6c3821446b8eca50ee07e5a3893ec51"
+dependencies = [
+ "magnus",
+ "serde",
+ "tap",
+]
+
+[[package]]
+name = "sharded-slab"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40ca3c46823713e0d4209592e8d6e826aa57e928f09752619fc696c499637f6"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "shell-words"
 version = "1.1.0"
@@ -681,12 +697,6 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "stable_deref_trait"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
-
 [[package]]
 name = "syn"
 version = "2.0.100"
@@ -699,10 +709,25 @@ dependencies = [
 ]
 
 [[package]]
-name = "synstructure"
-version = "0.13.1"
+name = "tap"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8af7666ab7b6390ab78131fb5b0fce11d6b7a6951602017c35fa82800708971"
+checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
+
+[[package]]
+name = "thiserror"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6aaf5339b578ea85b50e080feb250a3e8ae8cfcdff9a461c9ec2904bc923f52"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fee6c4efc90059e10f81e6d42c60a18f76588c3d74cb83a0b242a2b6c7504c1"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -710,13 +735,13 @@ dependencies = [
 ]
 
 [[package]]
-name = "tinystr"
-version = "0.7.6"
+name = "thread_local"
+version = "1.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9117f5d4db391c1cf6927e7bea3db74b9a1c1add8f7eda9ffd5364f40f57b82f"
+checksum = "8b9ef9bad013ada3808854ceac7b46812a6465ba368859a37e2100283d2d719c"
 dependencies = [
- "displaydoc",
- "zerovec",
+ "cfg-if",
+ "once_cell",
 ]
 
 [[package]]
@@ -748,6 +773,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "tokio-stream"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eca58d7bba4a75707817a2c44174253f9236b2d5fbd055602e9d5c07c139a047"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "tracing"
 version = "0.1.41"
@@ -777,6 +813,36 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e672c95779cf947c5311f83787af4fa8fffd12fb27e4993211a84bdfd9610f9c"
 dependencies = [
  "once_cell",
+ "valuable",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
+dependencies = [
+ "log",
+ "once_cell",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8189decb5ac0fa7bc8b96b7cb9b2701d60d48805aca84a238004d665fcc4008"
+dependencies = [
+ "matchers",
+ "nu-ansi-term",
+ "once_cell",
+ "regex",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
 ]
 
 [[package]]
@@ -786,28 +852,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
 [[package]]
-name = "url"
-version = "2.5.4"
+name = "valuable"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32f8b686cadd1473f4bd0117a5d28d36b1ade384ea9b5069a1c40aefed7fda60"
-dependencies = [
- "form_urlencoded",
- "idna",
- "percent-encoding",
- "serde",
-]
-
-[[package]]
-name = "utf16_iter"
-version = "1.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8232dd3cdaed5356e0f716d285e4b40b932ac434100fe9b7e0e8e935b9e6246"
-
-[[package]]
-name = "utf8_iter"
-version = "1.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
+checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
 
 [[package]]
 name = "wasi"
@@ -815,6 +863,28 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
@@ -887,82 +957,3 @@ name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
-
-[[package]]
-name = "write16"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d1890f4022759daae28ed4fe62859b1236caebfc61ede2f63ed4e695f3f6d936"
-
-[[package]]
-name = "writeable"
-version = "0.5.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e9df38ee2d2c3c5948ea468a8406ff0db0b29ae1ffde1bcf20ef305bcc95c51"
-
-[[package]]
-name = "yoke"
-version = "0.7.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "120e6aef9aa629e3d4f52dc8cc43a015c7724194c97dfaf45180d2daf2b77f40"
-dependencies = [
- "serde",
- "stable_deref_trait",
- "yoke-derive",
- "zerofrom",
-]
-
-[[package]]
-name = "yoke-derive"
-version = "0.7.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2380878cad4ac9aac1e2435f3eb4020e8374b5f13c296cb75b4620ff8e229154"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "synstructure",
-]
-
-[[package]]
-name = "zerofrom"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
-dependencies = [
- "zerofrom-derive",
-]
-
-[[package]]
-name = "zerofrom-derive"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "synstructure",
-]
-
-[[package]]
-name = "zerovec"
-version = "0.10.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa2b893d79df23bfb12d5461018d408ea19dfafe76c2c7ef6d4eba614f8ff079"
-dependencies = [
- "yoke",
- "zerofrom",
- "zerovec-derive",
-]
-
-[[package]]
-name = "zerovec-derive"
-version = "0.10.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6eafa6dfb17584ea3e2bd6e76e0cc15ad7af12b09abdd1ca55961bed9b1063c6"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]

ext/mcp/Cargo.toml

@@ -3,9 +3,21 @@ name = "mcp"
 version = "0.1.0"
 edition = "2021"
 
+[[bin]]
+name = "internal-test"
+path = "src/internal-test.rs"
+
 [lib]
 crate-type = ["cdylib"]
 
 [dependencies]
-magnus = "0.7"
-mcp-sdk = "0.0.3"
+jsonrpsee = { version = "0.24.8", features = ["async-client", "client-core", "tracing"] }
+magnus = { version = "0.7", features = ["default"] }
+tokio = { version = "1.44.1", features = ["full"] }
+anyhow = "1.0.97"
+tracing = "0.1.41"
+serde = { version = "1.0.219", features = ["derive"] }
+serde_json = "1.0.140"
+tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
+once_cell = "1.19.0"
+serde_magnus = "0.9.0"

ext/mcp/src/internal-test.rs

@@ -0,0 +1,61 @@
+use std::process::Stdio;
+use jsonrpsee::core::client::{
+    Client, ClientBuilder, ClientT, TransportReceiverT, TransportSenderT,
+};
+use jsonrpsee::core::traits::ToRpcParams;
+use tokio::io::{AsyncBufReadExt, AsyncWriteExt};
+use serde::Serialize;
+use serde_json::json;
+use types::{Implementation, InitializeRequestParams, InitializeResult};
+use crate::types::{CallToolRequestParams, ClientCapabilities, ListToolsRequestParams, ListToolsResult};
+
+mod types;
+mod rpc_helpers;
+mod stdio_transport;
+
+use rpc_helpers::*;
+use stdio_transport::StdioTransport;
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    tracing_subscriber::fmt()
+        .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
+        .with_file(true)
+        .with_line_number(true)
+        .with_thread_ids(true)
+        .with_thread_names(true)
+        .with_target(true)
+        .with_level(true)
+        .init();
+
+    let cmd = tokio::process::Command::new("/Users/joshuacoles/.local/bin/mcp-server-fetch")
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .spawn()?;
+
+    let transport = StdioTransport::new(cmd);
+
+    let client: Client = ClientBuilder::default().build_with_tokio(
+        transport.clone(),
+        transport.clone(),
+    );
+
+    let response: InitializeResult = client.request("initialize", InitializeRequestParams {
+        capabilities: ClientCapabilities::default(),
+        client_info: Implementation { name: "Rust MCP".to_string(), version: "0.1.0".to_string() },
+        protocol_version: "2024-11-05".to_string(),
+    }.to_rpc()).await?;
+
+    client.notification("notifications/initialized", NoParams).await?;
+
+    let response: ListToolsResult = client.request("tools/list", ListToolsRequestParams::default().to_rpc()).await?;
+
+    let response: serde_json::Value = client.request("tools/call", CallToolRequestParams {
+        arguments: json!({ "url": "http://example.com" }).as_object().unwrap().clone(),
+        name: "fetch".to_string(),
+    }.to_rpc()).await?;
+
+    println!("Response: {:#?}", response);
+
+    Ok(())
+}

ext/mcp/src/lib.rs

@@ -1,12 +1,123 @@
-use magnus::{function, Error, Ruby};
+use jsonrpsee::async_client::{Client, ClientBuilder};
+use tokio::process::Command;
+use crate::mcp_client::McpClient;
+use jsonrpsee::core::client::ClientT;
+use once_cell::sync::Lazy;
+use magnus::prelude::*;
 
-fn distance(a: (f64, f64), b: (f64, f64)) -> f64 {
-    ((b.0 - a.0).powi(2) + (b.1 - a.1).powi(2)).sqrt()
+mod mcp_client;
+mod types;
+mod rpc_helpers;
+mod stdio_transport;
+
+use std::{
+    hash::{Hash, Hasher},
+};
+
+use magnus::{function, method, prelude::*, scan_args::{get_kwargs, scan_args}, typed_data, Error, RHash, Ruby, Symbol, TryConvert, Value};
+use serde_magnus::serialize;
+use crate::types::{CallToolRequestParams, Implementation, InitializeRequestParams, InitializeResult};
+
+// Create global runtime
+static RUNTIME: Lazy<tokio::runtime::Runtime> = Lazy::new(|| {
+    tokio::runtime::Runtime::new().expect("Failed to create Tokio runtime")
+});
+
+#[magnus::wrap(class = "Mcp::Client", free_immediately, size)]
+struct McpClientRb {
+    client: McpClient,
+}
+
+impl McpClientRb {
+    fn new(command: String, args: Vec<String>) -> Result<Self, magnus::Error> {
+        let client = RUNTIME.block_on(async {
+            let child = Command::new(command)
+                .args(args)
+                .stdin(std::process::Stdio::piped())
+                .stdout(std::process::Stdio::piped())
+                .spawn()
+                .unwrap();
+
+            let transport = stdio_transport::StdioTransport::new(child);
+
+            ClientBuilder::default().build_with_tokio(
+                transport.clone(),
+                transport.clone(),
+            )
+        });
+
+        Ok(Self { client: McpClient { client } })
+    }
+
+    fn connect(&self) -> Result<bool, magnus::Error> {
+        RUNTIME.block_on(async {
+            let a = self.client.initialize(InitializeRequestParams {
+                capabilities: Default::default(),
+                client_info: Implementation { name: "ABC".to_string(), version: "0.0.1".to_string() },
+                protocol_version: "2024-11-05".to_string(),
+            }).await;
+
+            match a {
+                Ok(_) => Ok(true),
+                Err(e) => Err(magnus::Error::new(
+                    magnus::exception::runtime_error(),
+                    e.to_string(),
+                )),
+            }
+        })
+    }
+
+    fn list_tools(&self) -> Result<Value, magnus::Error> {
+        RUNTIME.block_on(async {
+            let a = self.client.list_tools().await;
+
+            match a {
+                Ok(tools) => serialize::<_, Value>(&tools),
+                Err(e) => Err(Error::new(
+                    magnus::exception::runtime_error(),
+                    e.to_string(),
+                )),
+            }
+        })
+    }
+
+    fn call_tool(&self, values: &[Value]) -> Result<Value, magnus::Error> {
+        let args = scan_args::<(Value,), (), (), (), RHash, ()>(values)?;
+        let ((name,)) = args.required;
+        let kwargs: RHash = args.keywords;
+        let kwargs: serde_json::Map<String, serde_json::Value> = serde_magnus::deserialize(kwargs)?;
+
+        let name = match Symbol::from_value(name) {
+            Some(symbol) => symbol.name()?.to_string(),
+            None => String::try_convert(name)?,
+        };
+
+        RUNTIME.block_on(async {
+            let a = self.client.call_tool::<serde_json::Value>(CallToolRequestParams {
+                name,
+                arguments: kwargs,
+            }).await;
+
+            match a {
+                Ok(a) => Ok(serde_magnus::serialize(&a)?),
+                Err(e) => Err(Error::new(
+                    magnus::exception::runtime_error(),
+                    e.to_string(),
+                )),
+            }
+        })
+    }
 }
 
 #[magnus::init]
 fn init(ruby: &Ruby) -> Result<(), Error> {
-    ruby.define_global_function("distance", function!(distance, 2));
+    let module = ruby.define_module("Mcp")?;
+    let client_class = module.define_class("Client", ruby.class_object())?;
+
+    client_class.define_singleton_method("new", function!(McpClientRb::new, 2))?;
+    client_class.define_method("connect", method!(McpClientRb::connect, 0))?;
+    client_class.define_method("list_tools", method!(McpClientRb::list_tools, 0))?;
+    client_class.define_method("call_tool", method!(McpClientRb::call_tool, -1))?;
 
     Ok(())
 }

ext/mcp/src/mcp_client.rs

@@ -0,0 +1,37 @@
+use jsonrpsee::async_client::Client;
+use jsonrpsee::core::client::ClientT;
+use tokio::process::Child;
+use stdio_transport::StdioTransport;
+use crate::rpc_helpers::{NoParams, ToRpcArg};
+use crate::stdio_transport;
+use crate::types::{CallToolRequestParams, InitializeRequestParams, InitializeResult, ListToolsRequestParams, ListToolsResult, Tool};
+
+pub struct McpClient {
+    pub(crate) client: Client,
+}
+
+impl McpClient {
+    pub async fn initialize(&self, params: InitializeRequestParams) -> Result<InitializeResult, anyhow::Error> {
+        let result: InitializeResult = self.client.request("initialize", params.to_rpc()).await?;
+        self.client.notification("notifications/initialized", NoParams).await?;
+        Ok(result)
+    }
+
+    pub async fn list_tools(&self) -> Result<Vec<Tool>, anyhow::Error> {
+        let mut tools = vec![];
+
+        let result: ListToolsResult = self.client.request("tools/list", NoParams).await?;
+        tools.extend(result.tools);
+
+        while let Some(cursor) = result.next_cursor.as_ref() {
+            let result: ListToolsResult = self.client.request("tools/list", ListToolsRequestParams { cursor: Some(cursor.clone()) }.to_rpc()).await?;
+            tools.extend(result.tools);
+        }
+
+        Ok(tools)
+    }
+
+    pub async fn call_tool<T: serde::de::DeserializeOwned>(&self, params: CallToolRequestParams) -> Result<T, anyhow::Error> {
+        Ok(self.client.request("tools/call", params.to_rpc()).await?)
+    }
+}

ext/mcp/src/rpc_helpers.rs

@@ -0,0 +1,31 @@
+use jsonrpsee::core::traits::ToRpcParams;
+use serde::Serialize;
+use serde_json::Error;
+use serde_json::value::RawValue;
+
+pub struct RpcArg<T>(T);
+
+impl<T: Serialize> ToRpcParams for RpcArg<T> {
+    fn to_rpc_params(self) -> Result<Option<Box<RawValue>>, Error> {
+        let s = String::from_utf8(serde_json::to_vec(&self.0)?).expect("Valid UTF8 format");
+        RawValue::from_string(s).map(Some)
+    }
+}
+
+pub trait ToRpcArg: Sized {
+    fn to_rpc(self) -> RpcArg<Self>;
+}
+
+impl<T: Serialize> ToRpcArg for &T {
+    fn to_rpc(self) -> RpcArg<Self> {
+        RpcArg(self)
+    }
+}
+
+pub struct NoParams;
+
+impl ToRpcParams for NoParams {
+    fn to_rpc_params(self) -> Result<Option<Box<RawValue>>, Error> {
+        Ok(None)
+    }
+}

ext/mcp/src/stdio_transport.rs

@@ -0,0 +1,48 @@
+use std::sync::Arc;
+use tokio::process::{Child, ChildStdin, ChildStdout};
+use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
+use jsonrpsee::core::async_trait;
+use jsonrpsee::core::client::{ReceivedMessage, TransportReceiverT, TransportSenderT};
+use tracing::debug;
+
+#[derive(Debug, Clone)]
+pub struct StdioTransport {
+    stdin: Arc<tokio::sync::Mutex<ChildStdin>>,
+    stdout: Arc<tokio::sync::Mutex<BufReader<ChildStdout>>>,
+}
+
+impl StdioTransport {
+    pub fn new(mut child: Child) -> Self {
+        let stdin = Arc::new(tokio::sync::Mutex::new(child.stdin.take().unwrap()));
+        let stdout = Arc::new(tokio::sync::Mutex::new(BufReader::new(child.stdout.take().unwrap())));
+        Self { stdin, stdout }
+    }
+}
+
+#[async_trait]
+impl TransportSenderT for StdioTransport {
+    type Error = tokio::io::Error;
+
+    #[tracing::instrument(skip(self), level = "trace")]
+    async fn send(&mut self, msg: String) -> Result<(), Self::Error> {
+        debug!("Sending: {}", msg);
+        let mut stdin = self.stdin.lock().await;
+        stdin.write_all(msg.as_bytes()).await?;
+        stdin.write_all(b"\n").await?;
+        Ok(())
+    }
+}
+
+#[async_trait]
+impl TransportReceiverT for StdioTransport {
+    type Error = tokio::io::Error;
+
+    #[tracing::instrument(skip(self), level = "trace")]
+    async fn receive(&mut self) -> Result<ReceivedMessage, Self::Error> {
+        let mut stdout = self.stdout.lock().await;
+        let mut str = String::new();
+        stdout.read_line(&mut str).await?;
+        debug!("Received: {}", str);
+        Ok(ReceivedMessage::Text(str))
+    }
+}

lib/mcp.rb

@@ -1,9 +1,32 @@
 # frozen_string_literal: true
 
 require_relative "mcp/version"
-require_relative "mcp/mcp"
 
 module Mcp
   class Error < StandardError; end
-  # Your code goes here...
+
+  class Client
+    def tools
+      ToolsProxy.new(self)
+    end
+  end
+
+  class ToolsProxy
+    def initialize(client)
+      @client = client
+      @tools = client.list_tools
+    end
+
+    private
+
+    def respond_to_missing?(name, include_private = false)
+      @tools.any? { |tool| tool["name"] == name.to_s } || super
+    end
+
+    def method_missing(name, **kwargs)
+      @client.call_tool(name, **kwargs)
+    end
+  end
 end
+
+require_relative "mcp/mcp"

spec/mcp_spec.rb

@@ -6,6 +6,9 @@ RSpec.describe Mcp do
   end
 
   it "does something useful" do
-    expect(false).to eq(true)
+    a = Mcp::Client.new("/Users/joshuacoles/.local/bin/mcp-server-fetch", [])
+    expect(a.connect).to eq(true)
+    puts a.list_tools
+    puts a.tools.fetch(url: 'http://example.com')
   end
 end