build(workspace): migrate to Rust edition 2024 with centralized deps

Workspace configuration:
- Upgrade Cargo resolver from "2" to "3" for edition 2024
- Add rust-version = "1.93" to [workspace.package]
- Centralize shared deps under [workspace.dependencies]
- Use dotted-key syntax for member package metadata
- Remove redundant license-file from workspace package

Toolchain and linting:
- Bump rust-toolchain.toml channel from 1.90 to 1.93
- Bump clippy.toml MSRV from 1.85 to 1.93
- Add **/bun.lock to .gitignore

Dependency declarations:
- Convert inline version specs to workspace refs in 10 tomls
- Migrate conformance, simple-chat-client to edition 2024
- Specify explicit axum/reqwest features where needed
- Remove unused tracing::error import in auth module

Edition 2024 let-chain refactors:
- Replace nested if-let with let-chains across the codebase
- Flatten conditionals in SSE retry and HTTP handling
- Simplify proc-macro pattern matching helpers
- Refactor elicitation schema nested validation
- Use let-chains in test_custom_headers assertions

Code modernization:
- Use derive(Default) + #[default] for ToolChoiceMode
- Fix doc comments to current type names (Params)
- Convert conformance handler to async fn syntax
- Add #[allow(dead_code)] for deserialized-only fields
- Clean up trailing blank lines and whitespace

Author: takumi-earth

.githooks/commit-msg

@@ -14,9 +14,9 @@ if echo "$commit_msg" | grep -qE "^Merge "; then
 fi
 
 # Try to use commitlint via npx if Node.js is available
-if command -v npx >/dev/null 2>&1; then
+if command -v bunx >/dev/null 2>&1; then
     # Run commitlint with config-conventional rules (same as CI)
-    echo "$commit_msg" | npx --yes @commitlint/cli@latest --extends @commitlint/config-conventional
+    echo "$commit_msg" | bunx --bun @commitlint/cli@latest --extends @commitlint/config-conventional
     exit $?
 fi
 

.gitignore

@@ -6,7 +6,7 @@ target/
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
 # More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
 Cargo.lock
-
+**/bun.lock
 # These are backup files generated by rustfmt
 **/*.rs.bk
 

Cargo.toml

@@ -1,18 +1,100 @@
 [workspace]
 members = ["crates/rmcp", "crates/rmcp-macros", "examples/*", "conformance"]
 default-members = ["crates/rmcp", "crates/rmcp-macros"]
-resolver = "2"
+resolver = "3"
 
 [workspace.dependencies]
+# Internal crates
 rmcp = { version = "0.17.0", path = "./crates/rmcp" }
 rmcp-macros = { version = "0.17.0", path = "./crates/rmcp-macros" }
 
+# Serialization
+serde = "1.0"
+serde_json = "1.0"
+serde_urlencoded = "0.7"
+
+# Async runtime
+tokio = "1"
+tokio-util = "0.7"
+tokio-stream = "0.1"
+futures = "0.3"
+async-trait = "0.1"
+pin-project-lite = "0.2"
+
+# Error handling
+thiserror = "2"
+anyhow = "1.0"
+
+# Logging
+tracing = "0.1"
+tracing-subscriber = "0.3"
+tracing-appender = "0.2"
+
+# HTTP / networking
+reqwest = { version = "0.13.2", default-features = false }
+http = "1"
+http-body = "1"
+http-body-util = "0.1"
+axum = { version = "0.8", default-features = false }
+tower = "0.5"
+tower-service = "0.3"
+tower-http = "0.6"
+hyper = "1"
+hyper-util = "0.1"
+sse-stream = "0.2"
+url = "2"
+
+# Encoding
+base64 = "0.22"
+bytes = "1"
+
+# Schema
+schemars = "1.2"
+
+# Utility
+rand = "0.10"
+uuid = "1"
+chrono = { version = "0.4.44", default-features = false }
+clap = "4.5"
+toml = "1.0"
+
+# Process
+process-wrap = "9.0"
+
+# Auth
+oauth2 = { version = "5.0", default-features = false }
+
+# Proc macros
+syn = "2"
+quote = "1"
+proc-macro2 = "1"
+darling = "0.23"
+pastey = "0.2.1"
+
+# Template
+askama = "0.15"
+
+# Crypto
+p256 = "0.13"
+
+# WebSocket
+tokio-tungstenite = "0.28.0"
+
+# URL encoding
+urlencoding = "2"
+
+# WASI
+wasi = "0.14.7"
+
+# AI integration
+rig-core = "0.31.0"
+
 [workspace.package]
 edition = "2024"
+rust-version = "1.93"
 version = "0.17.0"
 authors = ["4t145 <u4t145@163.com>"]
 license = "Apache-2.0"
-license-file = "LICENSE"
 repository = "https://github.com/modelcontextprotocol/rust-sdk/"
 description = "Rust SDK for Model Context Protocol"
 keywords = ["mcp", "sdk", "tokio", "modelcontextprotocol"]

clippy.toml

@@ -1,3 +1,3 @@
-msrv = "1.85"
+msrv = "1.93"
 too-many-arguments-threshold = 10
 check-private-items = false

conformance/Cargo.toml

@@ -1,7 +1,8 @@
 [package]
 name = "mcp-conformance"
 version = "0.1.0"
-edition = "2021"
+edition.workspace = true
+rust-version.workspace = true
 publish = false
 
 [[bin]]
@@ -13,24 +14,41 @@ name = "conformance-client"
 path = "src/bin/client.rs"
 
 [dependencies]
-rmcp = { path = "../crates/rmcp", features = [
+rmcp = { workspace = true, features = [
     "server",
     "client",
     "elicitation",
     "auth",
     "transport-streamable-http-server",
     "transport-streamable-http-client-reqwest",
 ] }
-tokio = { version = "1", features = ["full"] }
-tokio-util = { version = "0.7" }
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
-tracing = "0.1"
-tracing-subscriber = { version = "0.3", features = ["env-filter"] }
-axum = { version = "0.8", features = ["macros"] }
-anyhow = "1"
-reqwest = { version = "0.13", features = ["json"] }
-urlencoding = "2"
-url = "2"
-p256 = { version = "0.13", features = ["ecdsa"] }
-base64 = "0.22"
+tokio = { workspace = true, features = ["full"] }
+tokio-util = { workspace = true }
+serde = { workspace = true, features = ["derive"] }
+serde_json = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true, features = ["env-filter"] }
+axum = { workspace = true, features = [
+    "form",
+    "http1",
+    "json",
+    "matched-path",
+    "original-uri",
+    "query",
+    "tokio",
+    "tower-log",
+    "tracing",
+    "macros",
+] }
+anyhow = { workspace = true }
+reqwest = { workspace = true, features = [
+    "default-tls",
+    "charset",
+    "http2",
+    "system-proxy",
+    "json",
+] }
+urlencoding = { workspace = true }
+url = { workspace = true }
+p256 = { workspace = true, features = ["ecdsa"] }
+base64 = { workspace = true }