mirror of
https://github.com/ModernRelay/omnigraph.git
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bcd0d9c867
Add the `omnigraph-mcp` crate (stateless Streamable-HTTP transport, `McpBackend`
seam, fail-closed Host/Origin policy) and the server backend projecting built-in
operations and the per-graph stored-query registry as MCP tools + resources over
`POST /graphs/{id}/mcp`. Every tool delegates to the same engine/handler
functions the REST routes use and is gated by the same Cedar `authorize` path;
reads/writes carry structured output.
Includes three correctness fixes from review + live testing:
- tools/list is a faithful relaxation of the per-call gate: a built-in whose
authorization depends on a caller-chosen branch is shown iff the actor could
invoke it on some branch, via PolicyEngine::permits_on_any_branch (capability
probe through the same Cedar authorizer). A fabricated-`main` probe wrongly
hid graph_mutate under the canonical "protect main, write unprotected" policy.
- The stored-query surface honors mode + `expose` on call as well as on list:
resolve_stored_tool is the single membership test, so the meta pair
(stored_query_list/stored_query_run) is callable only in `meta` mode and
stored_query_run resolves exposed-only. An `expose:false` query is unreachable
by name on the agent surface (it stays HTTP/service-callable).
- The loopback Host allow-list is the full set [127.0.0.1, ::1, localhost]
(matches rmcp's default), so an IPv6 loopback `Host: [::1]` is accepted
regardless of which stack the server bound.
The protocol-version contract is documented (initialize negotiates the version
in its body, so the MCP-Protocol-Version header is validated on non-init
requests only) and pinned by a test.
Tests: omnigraph-mcp/tests/standalone.rs, omnigraph-server/tests/mcp.rs,
omnigraph-policy permits_on_any_branch unit test, omnigraph-api-types schema
projection. Full workspace gate green.
58 lines
2.2 KiB
TOML
58 lines
2.2 KiB
TOML
[package]
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name = "omnigraph-server"
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version = "0.7.0"
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edition = "2024"
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description = "HTTP server for the Omnigraph graph database."
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license = "MIT"
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repository = "https://github.com/ModernRelay/omnigraph"
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homepage = "https://github.com/ModernRelay/omnigraph"
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documentation = "https://docs.rs/omnigraph-server"
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[[bin]]
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name = "omnigraph-server"
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path = "src/main.rs"
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[features]
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default = []
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# Enables the AWS Secrets Manager bearer-token source. Off by default — on-prem
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# and local-dev builds don't pay the AWS SDK compile cost.
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aws = ["dep:aws-config", "dep:aws-sdk-secretsmanager"]
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[dependencies]
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omnigraph = { package = "omnigraph-engine", path = "../omnigraph", version = "0.7.0" }
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omnigraph-compiler = { path = "../omnigraph-compiler", version = "0.7.0" }
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omnigraph-policy = { path = "../omnigraph-policy", version = "0.7.0" }
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omnigraph-api-types = { path = "../omnigraph-api-types", version = "0.7.0" }
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omnigraph-cluster = { path = "../omnigraph-cluster", version = "0.7.0" }
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# The MCP surface. rmcp is contained to omnigraph-mcp — the server carries NO
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# direct rmcp dependency (verify: `cargo tree -p omnigraph-server -e normal | grep rmcp`).
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omnigraph-mcp = { path = "../omnigraph-mcp", version = "0.7.0" }
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axum = { workspace = true }
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http = "1"
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clap = { workspace = true }
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color-eyre = { workspace = true }
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serde = { workspace = true }
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serde_json = { workspace = true }
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tokio = { workspace = true }
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serde_yaml = { workspace = true }
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tracing = { workspace = true }
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tracing-subscriber = { workspace = true }
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tower-http = { workspace = true }
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utoipa = { workspace = true }
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futures = { workspace = true }
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sha2 = { workspace = true }
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subtle = { workspace = true }
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async-trait = { workspace = true }
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arc-swap = { workspace = true }
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dashmap = "6"
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regex = { workspace = true }
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thiserror = { workspace = true }
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aws-config = { version = "1", optional = true, default-features = false, features = ["rustls", "rt-tokio", "credentials-process", "sso"] }
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aws-sdk-secretsmanager = { version = "1", optional = true, default-features = false, features = ["rustls", "rt-tokio"] }
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[dev-dependencies]
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tempfile = { workspace = true }
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tower = { workspace = true }
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serial_test = "3"
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lance = { workspace = true }
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lance-index = { workspace = true }
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