matrix: hive-matrix-mcp crate (daemon+stdio bridge) + harness wiring (#548 phase 3)

hive-matrix-mcp/Cargo.toml

@@ -0,0 +1,36 @@
+[package]
+name = "hive-matrix-mcp"
+edition.workspace = true
+version.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+anyhow.workspace = true
+futures-util.workspace = true
+matrix-sdk.workspace = true
+reqwest.workspace = true
+rmcp.workspace = true
+schemars.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+tokio.workspace = true
+tracing.workspace = true
+tracing-subscriber.workspace = true
+
+# `hive-matrix-daemon` — long-running per-agent matrix-sdk Client +
+# sync loop. Holds the unix socket the stdio MCP bridge talks to and
+# emits hyperhive wake signals on incoming room events.
+[[bin]]
+name = "hive-matrix-daemon"
+path = "src/main.rs"
+
+# `hive-matrix-mcp` — thin stdio MCP bridge spawned by claude per turn.
+# Forwards every tool call to the daemon over /run/hive-matrix.sock,
+# returns the daemon's response shape to claude. No matrix-sdk dep at
+# this entrypoint — the heavy crate only loads when the daemon binary
+# is invoked.
+[[bin]]
+name = "hive-matrix-mcp"
+path = "src/bin/mcp.rs"