chenhg5/cc-connect · error

slack: send image: %w

Error message

slack: send image: %w

What it means

Wrapped error from slack-go UploadFileV2Context when uploading and posting an image to the reply channel/thread; the Slack file upload flow (upload/share) failed.

Source

Thrown at platform/slack/slack.go:514

	rc, ok := rctx.(replyContext)
	if !ok {
		return fmt.Errorf("slack: SendImage: invalid reply context type %T", rctx)
	}

	name := img.FileName
	if name == "" {
		name = "image.png"
	}

	_, err := p.client.UploadFileV2Context(ctx, slack.UploadFileV2Parameters{
		Reader:          bytes.NewReader(img.Data),
		FileSize:        len(img.Data),
		Filename:        name,
		Channel:         rc.channel,
		ThreadTimestamp: rc.timestamp,
	})
	if err != nil {
		return fmt.Errorf("slack: send image: %w", err)
	}
	return nil
}

var _ core.ImageSender = (*Platform)(nil)
var _ core.ObserverTarget = (*Platform)(nil)

// SendObservation implements core.ObserverTarget for terminal session observation.
func (p *Platform) SendObservation(ctx context.Context, channelID, text string) error {
	_, _, err := p.client.PostMessageContext(ctx, channelID,
		slack.MsgOptionText(text, false),
		slack.MsgOptionDisableLinkUnfurl(),
	)
	if err != nil {
		return fmt.Errorf("slack: send observation: %w", err)
	}
	return nil
}

View on GitHub (pinned to 4000b2338a)

Solutions

1. Check Slack file size limits and bot channel membership
2. Retry transient errors

When it happens

Trigger: Thrown at platform/slack/slack.go:514 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/af45d95b2188b419. Report an issue: GitHub.