v0.6.0

What's new

• Read receipts — agent and standalone command support
• Join profile fields — --profile-image and --metadata flags on conversations join
• Custom home directory — --home flag and CONVOS_HOME env var
• Upload improvements — convos-api as default upload provider, S3 provider with AWS Sigv4 signing
• Profile image fixes — encrypt + upload via Pinata, cache updates after profile changes