v1.1.21

v1.1.21

Concurrent agents can now share one editor safely, and Blueprints diff semantically instead of as opaque binary uassets.

Server

• Per-project bridge port. The C++ bridge binds a WebSocket port derived from a hash of the project root path (IANA ephemeral range 49152-65535) instead of a fixed 9877. Two checkouts of a project, or several unrelated projects, on one machine each get a stable, launch-order-independent port, so their MCP clients never collide. The Node client and the bridge compute the identical value independently, and the bridge publishes the actual bound port to <project>/Saved/UE_MCP_Bridge/port.json as the authoritative source. Pin an explicit port with UE_MCP_PORT or bridge.port in ue-mcp.yml. The legacy 9877 remains the fallback when no project root is known.
• Per-asset exclusive locking for concurrent agents. New asset(lock), asset(unlock), and asset(list_locks) actions. The lock registry lives in the shared editor bridge, keyed by asset path with a TTL lease so a crashed session never wedges an asset. Mutating calls acquire the lock automatically and return a retryable ASSET_LOCKED error when another session holds it.
• Semantic Blueprint diffing (phase 1). New blueprint(diff) compares two Blueprints structurally: parent class, variables (type and default), functions and macros, components, and per-graph node and connection deltas keyed on stable node GUIDs, so edits are matched rather than reported as remove-plus-add. Returns a structured delta plus a human summary and change count. Revision-based diffing through source control is a staged follow-up.

Internals

• scripts/smoke-test.js resolves the bridge port from the port.json lockfile when --port is not passed, so smoke runs reach a derived-port editor without a hand-specified port. Explicit --port still wins; 9877 is the final fallback.
• Docs updated for the per-project port, asset locking, and Blueprint diffing (configuration, architecture, tool reference).