2025-05-02 17:25:58 -07:00
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[package]
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2025-07-30 18:37:00 -07:00
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edition = "2024"
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2025-05-02 17:25:58 -07:00
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name = "codex-mcp-server"
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2025-05-07 10:08:06 -07:00
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version = { workspace = true }
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2025-05-02 17:25:58 -07:00
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2025-05-14 13:15:41 -07:00
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[[bin]]
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name = "codex-mcp-server"
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path = "src/main.rs"
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[lib]
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name = "codex_mcp_server"
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path = "src/lib.rs"
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2025-05-08 09:46:18 -07:00
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[lints]
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workspace = true
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2025-05-02 17:25:58 -07:00
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[dependencies]
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2025-09-22 18:47:01 +02:00
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anyhow = { workspace = true }
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codex-arg0 = { workspace = true }
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codex-common = { workspace = true, features = ["cli"] }
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codex-core = { workspace = true }
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codex-protocol = { workspace = true }
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fix: separate `codex mcp` into `codex mcp-server` and `codex app-server` (#4471)
This is a very large PR with some non-backwards-compatible changes.
Historically, `codex mcp` (or `codex mcp serve`) started a JSON-RPC-ish
server that had two overlapping responsibilities:
- Running an MCP server, providing some basic tool calls.
- Running the app server used to power experiences such as the VS Code
extension.
This PR aims to separate these into distinct concepts:
- `codex mcp-server` for the MCP server
- `codex app-server` for the "application server"
Note `codex mcp` still exists because it already has its own subcommands
for MCP management (`list`, `add`, etc.)
The MCP logic continues to live in `codex-rs/mcp-server` whereas the
refactored app server logic is in the new `codex-rs/app-server` folder.
Note that most of the existing integration tests in
`codex-rs/mcp-server/tests/suite` were actually for the app server, so
all the tests have been moved with the exception of
`codex-rs/mcp-server/tests/suite/mod.rs`.
Because this is already a large diff, I tried not to change more than I
had to, so `codex-rs/app-server/tests/common/mcp_process.rs` still uses
the name `McpProcess` for now, but I will do some mechanical renamings
to things like `AppServer` in subsequent PRs.
While `mcp-server` and `app-server` share some overlapping functionality
(like reading streams of JSONL and dispatching based on message types)
and some differences (completely different message types), I ended up
doing a bit of copypasta between the two crates, as both have somewhat
similar `message_processor.rs` and `outgoing_message.rs` files for now,
though I expect them to diverge more in the near future.
One material change is that of the initialize handshake for `codex
app-server`, as we no longer use the MCP types for that handshake.
Instead, we update `codex-rs/protocol/src/mcp_protocol.rs` to add an
`Initialize` variant to `ClientRequest`, which takes the `ClientInfo`
object we need to update the `USER_AGENT_SUFFIX` in
`codex-rs/app-server/src/message_processor.rs`.
One other material change is in
`codex-rs/app-server/src/codex_message_processor.rs` where I eliminated
a use of the `send_event_as_notification()` method I am generally trying
to deprecate (because it blindly maps an `EventMsg` into a
`JSONNotification`) in favor of `send_server_notification()`, which
takes a `ServerNotification`, as that is intended to be a custom enum of
all notification types supported by the app server. So to make this
update, I had to introduce a new variant of `ServerNotification`,
`SessionConfigured`, which is a non-backwards compatible change with the
old `codex mcp`, and clients will have to be updated after the next
release that contains this PR. Note that
`codex-rs/app-server/tests/suite/list_resume.rs` also had to be update
to reflect this change.
I introduced `codex-rs/utils/json-to-toml/src/lib.rs` as a small utility
crate to avoid some of the copying between `mcp-server` and
`app-server`.
2025-09-30 00:06:18 -07:00
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codex-utils-json-to-toml = { workspace = true }
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2025-09-22 18:47:01 +02:00
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mcp-types = { workspace = true }
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schemars = { workspace = true }
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serde = { workspace = true, features = ["derive"] }
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serde_json = { workspace = true }
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shlex = { workspace = true }
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tokio = { workspace = true, features = [
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2025-05-02 17:25:58 -07:00
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"io-std",
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"macros",
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"process",
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"rt-multi-thread",
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"signal",
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] }
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2025-09-22 18:47:01 +02:00
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tracing = { workspace = true, features = ["log"] }
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tracing-subscriber = { workspace = true, features = ["env-filter", "fmt"] }
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2025-05-05 07:16:19 -07:00
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[dev-dependencies]
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2025-09-22 18:47:01 +02:00
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assert_cmd = { workspace = true }
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core_test_support = { workspace = true }
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mcp_test_support = { workspace = true }
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os_info = { workspace = true }
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pretty_assertions = { workspace = true }
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tempfile = { workspace = true }
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wiremock = { workspace = true }
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