v0.3.13

Courier 0.3.12 offered MCP protocol 2026-07-28, and Claude Code rejects the claude/channel capability on that revision, so sessions started with an error and courier's channel was refused. This release takes sigil-mcp 0.18.2, which keeps channel servers on the legacy initialize handshake. Tools and channels both work there.

Changes

• Courier answers Claude Code's server/discover probe with only the legacy protocol revisions, so the client connects with initialize and accepts courier's channel. (sigil-mcp 0.18.2)

Verification: a fresh Claude Code 2.1.282 session probed this build, fell back to initialize with 2025-11-25, and delivered send-message to a leader relay.