#### **Note: This list may not up to date. There are rapidly more and more improvements, fixes, changes, etc being made that it is becoming more difficult to maintain this list. I recommend that you give conduwuit a try and see the differences for yourself. If you have any concerns, feel free to join the conduwuit Matrix room and ask any pre-usage questions.**
- Send `Cache-Control` response header with `immutable` and 1 year cache length for all media requests (download and thumbnail) to instruct clients to cache media, and reduce server load from media requests that could be otherwise cached
- Eliminate all usage of the thread-blocking `getaddrinfo(3)` call upon DNS queries, significantly improving federation latency/ping and cache DNS results (NXDOMAINs, successful queries, etc) using hickory-dns / hickory-resolver
- Vastly improve RocksDB default settings to use new features that help with performance significantly, uses settings tailored to SSDs, various ways to tweak RocksDB, and a conduwuit setting to tell RocksDB to use settings that are tailored to HDDs or slow spinning rust storage or buggy filesystems.
- Implement database flush and cleanup conduwuit operations when using RocksDB
- Implement RocksDB write buffer corking and coalescing in database write-heavy areas
- Perform connection pooling and keepalives where necessary to significantly improve federation performance and latency
- Various config options to tweak connection pooling, request timeouts, connection timeouts, DNS timeouts and settings, etc with good defaults which also help huge with performance via reusing connections and retrying where needed
- Properly get and use the amount of parallelism / tokio workers
- Implement building conduwuit with jemalloc (which extends to the RocksDB jemalloc feature for maximum gains) or hardened_malloc light variant, and io_uring support, and produce CI builds with jemalloc and io_uring by default for performance (Nix doesn't seem to build [hardened_malloc-rs](https://github.com/girlbossceo/hardened_malloc-rs) properly)
- Add support for caching DNS results with hickory-dns / hickory-resolver in conduwuit (not a replacement for a proper resolver cache, but still far better than nothing), also properly falls back on TCP for UDP errors or if a SRV response is too large
- Add config option for using DNS over TCP, and config option for controlling A/AAAA record lookup strategy (e.g. don't query AAAA records if you don't have IPv6 connectivity)
- Overall significant database, Client-Server, and federation performance and latency improvements (check out the ping room leaderboards if you don't believe me :>)
- Add config options for RocksDB compression and bottommost compression, including choosing the algorithm and compression level
- Use [loole](https://github.com/mahdi-shojaee/loole) MPSC channels instead of tokio MPSC channels for huge performance boosts in sending channels (mainly relevant for federation) and presence channels
- Use `tracing`/`log`'s `release_max_level_info` feature to improve performance, build speeds, binary size, and CPU usage in release builds by avoid compiling debug/trace log level macros that users will generally never use (can be disabled with a build-time feature flag)
- Remove some unnecessary checks on EDU handling for incoming transactions, effectively speeding them up
- Simplify, dedupe, etc huge chunks of the codebase, including some that were unnecessary overhead, binary bloats, or preventing compiler/linker optimisations
- Add legacy Element client hack fixing password changes and deactivations on legacy Element Android/iOS due to usage of an unspecced `user` field for UIAA
- Raise and improve all the various request timeouts making some things like room joins and client bugs error less or none at all than they should, and make them all user configurable
- Add missing `reason` field to user ban events (`/ban`)
- Stop sending `make_join` requests on room joins if 15 servers respond with `M_UNSUPPORTED_ROOM_VERSION` or `M_INVALID_ROOM_VERSION`
- Stop sending `make_join` requests if 50 servers cannot provide `make_join` for us
- Respect *most* client parameters for `/media/` requests (`allow_redirect` still needs work)
- Return joined member count of rooms for push rules/conditions instead of a hardcoded value of 10
- Make `CONDUIT_CONFIG` optional, relevant for container users that configure only by environment variables and no longer need to set `CONDUIT_CONFIG` to an empty string.
- Allow HEAD and PATCH (MSC4138) HTTP requests in CORS for clients (despite not being explicity mentioned in Matrix spec, HTTP spec says all HEAD requests need to behave the same as GET requests, Synapse supports HEAD requests)
- Misc edge-case search fixes (e.g. potentially missing some events)
- Misc `/sync` fixes (e.g. returning unnecessary data or incorrect/invalid responses)
- Add `replaces_state` and `prev_sender` in `unsigned` for state event changes which primarily makes Element's "See history" button on a state event functional
- Fix Conduit not allowing incoming federation requests for various world readable rooms
- Fix Conduit not respecting the client-requested file name on media requests
- Prevent sending junk / non-membership events to `/send_join` and `/send_leave` endpoints
- Only allow the requested membership type on `/send_join` and `/send_leave` endpoints (e.g. don't allow leave memberships on join endpoints)
- Prevent state key impersonation on `/send_join` and `/send_leave` endpoints
- Validate `X-Matrix` origin and request body `"origin"` field on incoming transactions
- For all [`/report`](https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3roomsroomidreporteventid) requests: check if the reported event ID belongs to the reported room ID, raise report reasoning character limit to 750, fix broken formatting, make a small delayed random response per spec suggestion on privacy, and check if the sender user is in the reported room.
- On new public room creations, only allow moderators to send `m.call.invite`, `org.matrix.msc3401.call`, and `org.matrix.msc3401.call.member` events to prevent unprivileged users from calling the entire room
- Add support for a "global ACLs" feature (`forbidden_remote_server_names`) that blocks inbound remote room invites, room joins by room ID on server name, room joins by room alias on server name, incoming federated joins, and incoming federated room directory requests. This is very helpful for blocking servers that are purely toxic/bad and serve no value in allowing our users to suffer from things like room invite spam or such. Please note that this is not a substitute for room ACLs.
- Add support for a config option to forbid our local users from sending federated room directory requests for (`forbidden_remote_room_directory_server_names`). Similar to above, useful for blocking servers that help prevent our users from wandering into bad areas of Matrix via room directories of those malicious servers.
- Add config option for auto remediating/deactivating local non-admin users who attempt to join bad/forbidden rooms (`auto_deactivate_banned_room_attempts`)
- Deactivating users will remove their profile picture, blurhash, display name, and leave all rooms by default just like Synapse and for additional privacy
- Reject some EDUs from ACL'd users such as read receipts and typing indicators
- Config option `ip_range_denylist` to support refusing to send requests (typically federation) to specific IP ranges, typically RFC 1918, non-routable, testnet, etc addresses like Synapse for security (note: this is not a guaranteed protection, and you should be using a firewall with zones if you want guaranteed protection as doing this on the application level is prone to bypasses).
- Media repository on handling `Content-Disposition` and `Content-Type` is fully spec compliant and secured
- Send secure default HTTP headers such as a strong restrictive CSP (see MSC4149), deny iframes, disable `X-XSS-Protection`, disable interest cohort in `Permission-Policy`, etc to mitigate any potential attack surface such as from untrusted media
- Replace the lightning bolt emoji option with support for setting any arbitrary text (e.g. another emoji) to suffix to all new user registrations, with a conduwuit default of "🏳️⚧️"
- Support config options via `CONDUWUIT_` prefix and accessing non-global struct config options with the `__` split (e.g. `CONDUWUIT_WELL_KNOWN__SERVER`)
- Add support for the Matrix spec compliance test suite [Complement](https://github.com/matrix-org/complement/) via the Nix flake and various other fixes for it
- Implement running and diff'ing Complement results in CI and error if any mismatch occurs to prevent large cases of conduwuit regressions
- Repo is (officially) mirrored to GitHub, GitLab, git.gay, git.girlcock.ceo, sourcehut, and Codeberg (see README.md for their links)
- Repo uses [Renovate](https://docs.renovatebot.com/), [Trivy](https://github.com/aquasecurity/trivy-action), and keeps ALL dependencies as up to date as possible
- Attempts and interest in removing extreme and unnecessary panics/unwraps/expects that can lead to denial of service or such (upstream and upstream contributors want this unusual behaviour for some reason)
- Purge unmaintained/irrelevant/broken database backends (heed, sled, persy) and other unnecessary code or overhead
- CI tests for all sorts of feature matrixes (jemalloc, non-defaullt, all features, etc)
- Add static and dynamic linking smoke tests in CI to prevent any potential linking regressions for Complement, static binaries, Nix devshells, etc
- Add timestamp by commit date when building OCI images for keeping image build reproducibility and still have a meaningful "last modified date" for OCI image
- Add timestamp by commit date via `SOURCE_DATE_EPOCH` for Debian packages
- Startup check if conduwuit running in a container and is listening on 127.0.0.1 (generally containers are using NAT networking and 0.0.0.0 is the intended listening address)
- Add support for a console CLI interface that can issue admin commands and output them in your terminal
- Add support for an admin-user-only commandline admin room interface that can be issued in any room with the `\\!admin` or `\!admin` prefix and returns the response as yourself in the same room
- Add admin commands for uptime, server startup, server shutdown, and server restart
- Fix admin room handler to not panic/crash if the admin room command response fails (e.g. too large message)
- Add command to dynamically change conduwuit's tracing log level filter on the fly
- Add admin command to fetch a server's `/.well-known/matrix/support` file
- Add debug admin command to force update user device lists (could potentially resolve some E2EE flukes)
- Implement **RocksDB online backups**, listing RocksDB backups, and listing database file counts all via admin commands
- Add various database visibility commands such as being able to query the getters and iterators used in conduwuit, a very helpful online debugging utility
- Forbid the admin room from being made public or world readable history
- Add `!admin` as a way to call the admin bot
- Extend clear cache admin command to support clearing more caches such as DNS and TLS name overrides
- Admin debug command to send a federation request/ping to a server's `/_matrix/federation/v1/version` endpoint and measures the latency it took
- Add admin command to list joined members in a room
- Add admin command to view the room topic of a room
- Add admin command to delete all remote media in the past X minutes as a form of deleting media that you don't want on your server that a remote user posted in a room, a `--force` flag to ignore errors, and support for reading `last modified time` instead of `creation time` for filesystems that don't support file created metadata
- Add admin command to return a room's full/complete state
- Admin debug command to fetch a PDU from a remote server and inserts it into our database/timeline as backfill
- Add admin command to delete media via a specific MXC. This deletes the MXC from our database, and the file locally.
- Add admin commands for banning (blocking) room IDs from our local users joining (admins are always allowed) and evicts all our local users from that room, in addition to bulk room banning support, and blocks room invites (remote and local) to the banned room, as a moderation feature
- Add debug admin commands to get the earliest and latest PDU in a room
- Add debug admin command to echo a message
- Add admin command to insert rooms tags for a user, most useful for inserting the `m.server_notice` tag on your admin room to make it "persistent" in the "System Alerts" section of Element
- Add experimental admin debug command for Dendrite's `AdminDownloadState` (`/admin/downloadState/{serverName}/{roomID}`) admin API endpoint to download and use a remote server's room state in the room
- Disable URL previews by default in the admin room due to various command outputs having "URLs" in them that clients may needlessly render/request
- Extend memory usage admin server command to support showing memory allocator stats such as jemalloc's
- Add admin debug command to see memory allocator's full extended debug statistics such as jemalloc's
- Query parameter `?format=event|content` for returning either the room state event's content (default) for the full room state event on `/_matrix/client/v3/rooms/{roomId}/state/{eventType}[/{stateKey}]` requests (see <https://github.com/matrix-org/matrix-spec/issues/1047>)
- Add **optional** feature flag to use SHA256 key names for media instead of base64 to overcome filesystem file name length limitations (OS error file name too long)
- Send a User-Agent on all of our requests
- Send `avatar_url` on invite room membership events/changes
- Support sending [`well_known` response to client login responses](https://spec.matrix.org/v1.10/client-server-api/#post_matrixclientv3login) if using config option `[well_known.client]`
- Implement `include_state` search criteria support for `/search` requests (response now can include room states)
- Declare various missing Matrix versions and features at `/_matrix/client/versions`
- Config option to change Conduit's behaviour of homeserver key fetching (`query_trusted_key_servers_first`). This option sets whether conduwuit will query trusted notary key servers first before the individual homeserver(s), or vice versa which may help in joining certain rooms.
- Add various documentation on maintaining conduwuit, using RocksDB online backups, some troubleshooting, using admin commands, moderation documentation, etc
- No cryptocurrency donations allowed, conduwuit is fully maintained by independent queer maintainers, and with a strong priority on inclusitivity and comfort for protected groups 🏳️⚧️
