chenhg5/cc-connect · error

weixin: not a weixin session key

Error message

weixin: not a weixin session key

What it means

ReconstructReplyCtx (used by cron/proactive sends) received a session key that does not start with the weixin sessionKeyPrefix, so it cannot belong to this platform — the key was produced by another platform or is malformed.

Source

Thrown at platform/weixin/weixin.go:909

		return []string{s}
	}
	var out []string
	runes := []rune(s)
	for len(runes) > 0 {
		n := maxRunes
		if len(runes) < n {
			n = len(runes)
		}
		out = append(out, string(runes[:n]))
		runes = runes[n:]
	}
	return out
}

// ReconstructReplyCtx implements core.ReplyContextReconstructor for cron / proactive sends.
func (p *Platform) ReconstructReplyCtx(sessionKey string) (any, error) {
	if !strings.HasPrefix(sessionKey, sessionKeyPrefix) {
		return nil, fmt.Errorf("weixin: not a weixin session key")
	}
	peer := strings.TrimPrefix(sessionKey, sessionKeyPrefix)
	tok := p.getContextToken(peer)
	if tok == "" {
		return nil, fmt.Errorf("weixin: no stored context_token for %q (user must message the bot first)", peer)
	}
	return &replyContext{peerUserID: peer, contextToken: tok}, nil
}

// FormattingInstructions implements core.FormattingInstructionProvider.
func (p *Platform) FormattingInstructions() string {
	return "Replies are delivered as plain text to Weixin. Avoid markdown tables; use short paragraphs."
}

var (
	_ core.Platform                      = (*Platform)(nil)
	_ core.ReplyContextReconstructor     = (*Platform)(nil)
	_ core.FormattingInstructionProvider = (*Platform)(nil)

View on GitHub (pinned to 4000b2338a)

Solutions

1. Route the reconstruction request to the platform that owns the session key (check the prefix) before calling ReconstructReplyCtx
2. Verify cron/timer jobs store the full platform-prefixed session key when created

When it happens

Trigger: Thrown at platform/weixin/weixin.go:909 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of chenhg5/cc-connect@4000b2338a (2026-09-06). Data as JSON: /api/errors/025d2d0205c55420. Report an issue: GitHub.