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  v1.21.0 — a missed MCP server is retried Stable

  joeyr released this 2026-09-16 13:35:29 -05:00 | 51 commits to main since this release

  Changed

  • A missed MCP server is retried instead of given up on. The bot asks
    every server in MCP_SERVERS for its tools once, at startup, and a server
    that did not answer was then missing for the life of the process. The case
    that hits is the cheap one: the bot and the espnff server are containers
    on the same host and they start together, so the bot can lose the race by a
    few seconds and then run for days with /aufhocker espnff mcp refusing
    every question. Nothing in Discord announced it — the first sign was a
    fantasy question refused, and the fix was a restart nobody knew to do.

    A server that misses the boot is now retried in the background: after a
    minute, then doubling to a two-hour ceiling. Each reconnect registers that
    server's tools on the live tool executor, so the fantasy command starts
    working mid-process and /aufhocker espnff help flips from "not connected"
    on its own. Both messages now say to wait rather than to restart.

    Backoff rather than a fixed interval because the two failures underneath
    have different lengths: a co-boot race is over inside a minute, while a
    server that is genuinely down is down for hours and polling it every minute
    buys nothing. Only the servers that are actually missing are retried — a
    session that connected is held open as before, since re-handshaking a
    working server would drop its tools mid-flight. Shutdown cancels the timer.

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