ReXisCe — A Rust XMPP Client

Native XMPP desktop messenger — pure Rust using iced.

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About the name

ReXisCe (pronunciation: /ˈʁe.xiʃ.se/ — "ré-xis-sê")

The name comes from the acronym RXC (R → Rust, X → XMPP, C → Client), transformed into a pronounceable word:

• Re — "R" (pronunciado "ré" em português)
• Xis — "X" (pronunciado "xis" em português)
• Ce — "C" (pronunciado "sê" em português)

This solves a common problem: pure acronyms are hard to speak. ReXisCe turns the abbreviation into a name.

Item	Name
Project	ReXisCe
Meaning	Rust XMPP Client
CLI binary	rexisce
Lib crate	rexisce
Config dir	~/.config/rexisce/

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Requirements

• Rust 1.80+ — rustup update stable
• Linux: sudo apt install libdbus-1-dev pkg-config libssl-dev
• macOS / Windows: no extra deps

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Getting started

git clone https://github.com/owner/rexisce
cd rexisce
make run

That's it. The first run compiles everything and opens the app.

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Common commands

make setup          # update Rust toolchain
make run            # compile (debug) and run
make build          # compile release binary → target/release/rexisce
make run-release    # compile release and run
make test           # run the full test suite
make lint           # clippy (warnings = errors)
make fmt            # auto-format source files
make clean          # delete build artifacts

For verbose XMPP logging:

RUST_LOG=rexisce=debug make run

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Integration tests

The tests/critical_flows.rs file covers end-to-end flows across modules (login → connect, MAM catchup, presence transitions, blocking, etc.):

make test-integration

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Stack

Layer	Crate
GUI	iced 0.13
XMPP	tokio-xmpp + xmpp-parsers
Async	tokio
TLS	rustls
Storage	SQLite via sqlx
Keychain	keyring
i18n	fluent-rs
Notifications	notify-rust

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Implemented XEPs

Core

• XEP-0030 — Service Discovery
• XEP-0115 — Entity Capabilities (CAPS)
• XEP-0153 — vCard-Based Avatar
• XEP-0191 — Simple Communications Blocking
• XEP-0198 — Stream Management
• XEP-0245 — /me Command in Chat Messages
• XEP-0280 — Message Carbons
• XEP-0313 — Message Archive Management (MAM)
• XEP-0363 — HTTP File Upload

Chat Features

• XEP-0079 — Advanced Message Processing (AMP)
• XEP-0085 — Chat State Notifications (typing indicators)
• XEP-0184 — Message Delivery Receipts
• XEP-0245 — /me Actions
• XEP-0308 — Message Correction
• XEP-0333 — Chat Markers (read receipts)
• XEP-0424 — Message Retraction
• XEP-0444 — User Mood
• XEP-0445 — Message Reactions
• XEP-0461 — Reply to Messages
• XEP-0393 — Message Styling

Presence & Status

• XEP-0178 — Presence Subscribe (Approved)
• XEP-0252 — Client State Indication (auto-away)
• Custom Status Message

MUC (Group Chat)

• XEP-0045 — Multi-User Chat
• XEP-0048 — Bookmarks

Privacy

• Delivery Receipts toggle
• Typing Indicators toggle
• Read Markers toggle

Other

• XEP-0050 — Ad-Hoc Commands (partial)
• XEP-0065 — SOCKS5 Bytestreams (for file transfer)

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Planned XEPs

High Priority

• XEP-0084 — PubSub Avatar (PEP metadata)
• XEP-0410 — Self-Ping (MUC keepalive)
• XEP-0352 — Client State Indication (CSI) — outgoing queue priority
• OMEMO (XEP-0440 + Signal-style double ratchet) — end-to-end encryption

MUC Admin (from Gajim analysis)

• MUC Affiliation Management (bans, admins, owners)
• MUC Role Management (moderator, participant, visitor)
• MUC Room Configuration (data forms)
• MUC Voice Request (request/toggle speaking permission)
• MUC Admin (full)

UI/UX

• XEP-0004 Data Forms Renderer (for ad-hoc commands, room config, registration)
• Privacy Lists (XEP-0016 / XEP-0191 extended)
• Bookmark Sync (XEP-0048 via PepPublish)
• Message Synchronization (XEP-0313 with full sync controls)
• Roster Item Exchange (XEP-0144)
• In-Band Registration (XEP-0077)
• Service Discovery Browser (XEP-0030 extended)
• Personal Event Publishing (XEP-0163 / PEP)
• User Tune (XEP-0118)
• User Location (XEP-0080)
• File Transfer (XEP-0065 + ICE-UDP)
• Audio/Video Calls (Jingle / XEP-0167)

Account Features

• Multi-account support
• Remember-Me (AUTH-1)
• Account migration/export

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Features

• XMPP login (SASL PLAIN / SCRAM-SHA-256, STARTTLS / Direct TLS)
• Contact roster with presence indicators
• 1:1 chat with message history (MAM)
• Group chat / MUC with roles, moderation, bookmarks
• Message corrections, retractions, reactions
• File upload with image thumbnails
• Avatars (vCard-temp + PEP)
• Stream Management / session resumption
• Message Carbons (sync across devices)
• Entity Capabilities + Service Discovery
• Blocking with server-side blocklist
• Ad-Hoc Commands (partial)
• Auto-away after inactivity
• Dark / light theme
• i18n (en-US, pt-BR)
• Desktop notifications
• Privacy toggles (receipts, typing, read markers)
• MAM archiving preferences
• Remember Me (password persistence in keychain)
• macOS, Linux, Windows

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Contributing

See CONTRIBUTING.md.

License

MIT

Built with vibecoding, using other XMPP clients as reference (Halloy, Dino, Gajim).