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mattermost

69 indexed repositories · View on GitHub

mattermost
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

TypeScript · 39105 stars
mattermost-mobile
Next generation iOS and Android apps for Mattermost in React Native

TypeScript · 2722 stars
desktop
Mattermost Desktop application for Windows, Mac and Linux

TypeScript · 2269 stars
docker
Install Mattermost server via Docker

Shell · 533 stars
mattermost-plugin-agents
Mattermost Agents plugin supporting multiple LLMs

Go · 250 stars
react-native-paste-input
React Native TextInput replacement to allow pasting files

Objective-C · 213 stars
mattermost-helm
Mattermost Helm charts for Kubernetes

Go Template · 201 stars
mattermost-plugin-github
GitHub plugin for Mattermost

Go · 179 stars
mattermost-plugin-starter-template
Build scripts and templates for writing Mattermost plugins.

Go · 156 stars
mattermost-plugin-gitlab
GitLab plugin for Mattermost

JavaScript · 152 stars
mattermost-plugin-calls

TypeScript · 150 stars
mattermost-plugin-boards
Mattermost plugin for Boards. This will host plugin only and is independent of Focalboard.

TypeScript · 144 stars
mattermost-operator
Mattermost Operator for Kubernetes

Go · 143 stars
mattermost-plugin-zoom
Zoom plugin for Mattermost :electric_plug:

Go · 111 stars
mattermost-plugin-jira
JIRA plugin for Mattermost 🔌

Go · 110 stars
mattermost-plugin-playbooks
Mattermost Playbooks enable reliable and repeatable processes for your teams using checklists, automation, and retrospectives.

TypeScript · 98 stars
mattermost-plugin-demo
A demo of what Mattermost plugins can do.

Go · 94 stars
mattermost-developer-documentation
Mattermost developer documentation.

CSS · 90 stars
mattermost-docker-preview
Mattermost Preview Docker Image

Dockerfile · 62 stars
mattermost-plugin-wrangler
Manage Mattermost Messages Masterfully!

Go · 61 stars
49 more repositories live on View on GitHub

Beginner friendly Everything

Open All

iOS app loops in 'missed websocket event' reconnect cycle against a healthy server until force-close Open

Difficulty 4/5 3-5 days Newbie friendliness 65/100

mattermost/mattermost-mobile#10183 · Opened Sep 19, 2026
Emoji picker skips custom emojis when some are already stored locally Open

Difficulty 2/5 1-3 hours Newbie friendliness 85/100

mattermost/mattermost-mobile#10180 · Opened Sep 18, 2026
Global Threads unread badge stays stale after threads are read on another device Open

Difficulty 4/5 3-5 days Newbie friendliness 72/100

mattermost/mattermost-mobile#10165 · Opened Sep 16, 2026
Publish Helm charts as OCI artifacts Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

mattermost/mattermost-helm#525 · Opened Sep 16, 2026
[Bug]: Files in server release tarballs are world-writable Open

Bug Report/Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

mattermost/mattermost#38562 · Opened Sep 16, 2026
[Bug]: Native back button doesnt work on the web Open

Bug Report/Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

mattermost/mattermost#38551 · Opened Sep 15, 2026
Link reference doesn't work correctly Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mattermost/mattermost#38545 · Opened Sep 15, 2026
Feature Idea: MCP for Mattermost Agents Open

Triage

Difficulty 5/5 Over a week Newbie friendliness 30/100

mattermost/mattermost-plugin-boards#253 · Opened Sep 14, 2026
[Bug]: config.json gets reset to defaults if the disk fills up during startup Open

Difficulty 3/5 1-2 days Newbie friendliness 75/100

mattermost/mattermost#38538 · Opened Sep 14, 2026
[Bug]: Loading screen stays on top of a fully loaded tab (new tab / Ctrl+R) until switching tabs Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/desktop#3994 · Opened Sep 14, 2026
Use meeting event types to set different statuses Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/mattermost-plugin-google-calendar#174 · Opened Sep 14, 2026
Android: Tapping notification for currently open thread redirects to Home Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

mattermost/mattermost-mobile#10152 · Opened Sep 13, 2026
[Feature request] Inline math expression autocomplete suggestion Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/mattermost#38496 · Opened Sep 12, 2026
Feature: Collapse Details of a Mattermost Message using <details> or similar markup as in github markdown Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

mattermost/mattermost#38480 · 2 reactions · Opened Sep 11, 2026
No desktop notifications or unread badge for new messages in private channels after upgrade to 11.10.1 Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mattermost/mattermost#38470 · Opened Sep 11, 2026
[Bug]: Team sidebar icon doesn't show indicator for @mentions in muted channels Open

Bug Report/Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

mattermost/mattermost#38469 · Opened Sep 11, 2026
generic-webhook-notification: no api_gateway_deployment/stage, so new routes are never served Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

mattermost/mattermost-cloud-monitoring#917 · Opened Sep 10, 2026
Feature request: display three reaction suggestions in the `sidebar-right` Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

mattermost/mattermost#38445 · Opened Sep 10, 2026
Allow users to send individual posts without triggering notifications Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

mattermost/mattermost#38443 · Opened Sep 10, 2026
Jira Cloud install is impossible: Atlassian removed private-app installation by descriptor URL (CHANGE-3096) Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

mattermost/mattermost-plugin-jira#1352 · Opened Sep 9, 2026
Upcoming-event reminder DM shows UTC times while /gcal today uses Google Calendar timezone Open

Difficulty 3/5 1-2 days Newbie friendliness 78/100

mattermost/mattermost-plugin-google-calendar#171 · Opened Sep 8, 2026
[Feature Request] Add a native GIPHY GIF picker to the Mobile message composer Open

Difficulty 5/5 Over a week Newbie friendliness 38/100

mattermost/mattermost-mobile#10138 · Opened Sep 7, 2026
Spacing scale: where do your spacing tokens live? (audit from the Rhythmguard benchmark) Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

mattermost/mattermost#38355 · Opened Sep 6, 2026
[Bug]: Text overlaps in Threads view on Windows 11 at 200% display scaling Open

Cannot Reproduce Windows

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/desktop#3980 · 1 comment · Opened Sep 5, 2026
[Bug]: Open

Bug Report/Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

mattermost/mattermost#38352 · Opened Sep 4, 2026
🐛 bug: Gemini 3.x tool calls fail after search_tools due to missing thought_signature Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/mattermost-plugin-agents#1020 · Opened Sep 2, 2026
[Bug]: reducers/plugins/index.ts:25 hasMenuId() returns early is the menu has no submenu Open

Bug Report/Open

Difficulty 1/5 Under an hour Newbie friendliness 88/100

mattermost/mattermost#38263 · 1 comment · Opened Sep 1, 2026
request FreeBSD arm64 build Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/mattermost-plugin-calls#1288 · Opened Sep 1, 2026
Error "No values to submit" when submit opening dialog without elements Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

mattermost/mattermost-mobile#10108 · Opened Sep 1, 2026
Regression: app does not inhibit screen blank/lock during call anymore, eventually interrupting call Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

mattermost/mattermost-mobile#10107 · Opened Sep 1, 2026
[Bug]: Very high memory usage Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

mattermost/mattermost#38260 · 3 comments · Opened Sep 1, 2026
Regression: interactive dialog `textarea` elements render as single-line inputs Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

mattermost/mattermost-mobile#10106 · Opened Aug 31, 2026
bug: Matty returns "An error occurred while accessing the LLM" when sending a message Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mattermost/mattermost-plugin-agents#1011 · Opened Aug 31, 2026
[Bug]: CPA multiselect and multiuser values have no element limit and accept duplicates Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/mattermost#38198 · 6 comments · Opened Aug 29, 2026
Feature: support NVIDIA Parakeet / Nemotron as local ASR backend (alternative to whisper.cpp) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

mattermost/calls-transcriber#48 · Opened Aug 28, 2026
Feature request: Add reaction marks to the `Threads` window Open

Difficulty 3/5 1-2 days Newbie friendliness 65/100

mattermost/mattermost#38184 · Opened Aug 28, 2026
[Bug]: Boards person-property picker loads only first 10 team users — no pagination, later users unassignable without typing a search Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

mattermost/mattermost#38146 · 3 comments · Opened Aug 26, 2026
Document/Photo sharing via share menu does not work on iOS Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

mattermost/mattermost-mobile#10095 · Opened Aug 25, 2026
[Bug]: MessageAttachment.IsValid rejects every numeric ts sent over JSON — int64 case is unreachable Open

Bug Report/Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

mattermost/mattermost#38127 · 3 comments · Opened Aug 25, 2026
[Bug]: Notifications not working on macOS, versions 6.3.0 and 6.2.3, works in 6.2.2 Open

Cannot Reproduce Type/Bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mattermost/desktop#3963 · 7 comments · Opened Aug 25, 2026
Android: toValidMinuteInterval returns 30 unconditionally, preventing other minute intervals Open

mattermost/mattermost-mobile#10094 · 1 assignee · Opened Aug 25, 2026
Feature Request: Inline Audio Player for Audio File Attachments Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

mattermost/mattermost#38112 · Opened Aug 24, 2026
Interactive Dialog: Date picker displays previous day when device is in positive UTC offset timezones (e.g. UTC+5) Open

mattermost/mattermost-mobile#10092 · 3 reactions · 1 assignee · Opened Aug 24, 2026
OpenAI Compatible streaming: SSE comment lines are silently skipped, so they never reset bifrost's per-chunk watchdog Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

mattermost/mattermost-plugin-agents#985 · Opened Aug 23, 2026
AtMentionProvider suppresses longer-prefix user autocomplete while remote results are pending Open

Difficulty 3/5 1-2 days Newbie friendliness 78/100

mattermost/mattermost#38080 · Opened Aug 21, 2026
[Bug]: Mattermost tray icon missing on Ubuntu 26.04 in 6.3.0, shows in 6.2.2 Open

Type/Bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/desktop#3954 · 5 comments · 1 reaction · Opened Aug 20, 2026
Hi-Res Photo Sharing With Automatic Resizing Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

mattermost/mattermost-mobile#10079 · 1 reaction · Opened Aug 20, 2026
Mobile ignores `show_unread_section` preference — "Group unreads separately" section never appears on mobile when set server-side Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

mattermost/mattermost-mobile#10077 · Opened Aug 19, 2026
[Bug]: Inline PDFs render as a black page in Desktop 6.3.0 but work in 6.2.2 Open

Difficulty 4/5 3-5 days Newbie friendliness 58/100

mattermost/desktop#3952 · 3 comments · Opened Aug 19, 2026
💡 idea: Embedding Search - qdrant support Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

mattermost/mattermost-plugin-agents#981 · Opened Aug 19, 2026

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