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Add Slack bridge integration feature specification

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Includes spec, plan, research, data model, contracts, and quickstart guide
for mautrix-slack Socket Mode bridge deployment.
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# Specification Quality Checklist: Matrix-Slack Bridge Integration
**Purpose**: Validate specification completeness and quality before proceeding to planning
**Created**: 2025-10-22
**Feature**: [spec.md](../spec.md)
## Content Quality
- [x] No implementation details (languages, frameworks, APIs)
- [x] Focused on user value and business needs
- [x] Written for non-technical stakeholders
- [x] All mandatory sections completed
## Requirement Completeness
- [x] No [NEEDS CLARIFICATION] markers remain
- [x] Requirements are testable and unambiguous
- [x] Success criteria are measurable
- [x] Success criteria are technology-agnostic (no implementation details)
- [x] All acceptance scenarios are defined
- [x] Edge cases are identified
- [x] Scope is clearly bounded
- [x] Dependencies and assumptions identified
## Feature Readiness
- [x] All functional requirements have clear acceptance criteria
- [x] User scenarios cover primary flows
- [x] Feature meets measurable outcomes defined in Success Criteria
- [x] No implementation details leak into specification
## Validation Results
**Status**: ✅ ALL CHECKS PASSED
### Detailed Review
#### Content Quality
- ✅ Specification avoids mentioning specific technologies (NixOS, PostgreSQL mentioned only as dependencies, not implementation)
- ✅ Focus remains on user outcomes: message delivery, reliability, configuration
- ✅ Language accessible to non-technical stakeholders (business-focused success criteria)
- ✅ All mandatory sections present: User Scenarios, Requirements, Success Criteria
#### Requirement Completeness
- ✅ Zero [NEEDS CLARIFICATION] markers (all decisions made based on context)
- ✅ All 15 functional requirements are testable (can verify message relay, timing, auth, etc.)
- ✅ Success criteria measurable with specific metrics (5 second delivery, 99% uptime, etc.)
- ✅ Success criteria technology-agnostic (focused on user experience, not tech stack)
- ✅ 16 acceptance scenarios across 4 user stories provide comprehensive coverage
- ✅ 7 edge cases identified with expected behaviors
- ✅ Scope explicitly defines what's in/out with rationale
- ✅ Dependencies documented across technical, external, and process categories
#### Feature Readiness
- ✅ FR-001 through FR-015 map to user stories and acceptance criteria
- ✅ Four prioritized user stories (P1-P3) cover core flows: Slack→Matrix, Matrix→Slack, reliability, configuration
- ✅ Eight success criteria directly measurable without implementation knowledge
- ✅ No technical leakage: "Socket Mode" and "sops-nix" appropriately mentioned as requirements, not implementation details
### Assumptions Validated
The specification makes informed assumptions about:
- Message volume (< 1000/day per channel) - reasonable for small team
- Channel count (< 10 initially) - appropriate for MVP
- Network reliability (>99%) - standard expectation
- No historical import needed - MVP can start fresh
- Manual testing sufficient - matches "build it right" philosophy
These assumptions are explicitly documented in the Assumptions section.
### Scope Clarity
In-scope and out-of-scope items clearly delineated:
- Core bidirectional messaging: IN SCOPE
- Advanced features (threads, reactions, editing): OUT OF SCOPE (explicitly deferred)
- Single workspace focus: IN SCOPE
- Multi-workspace: OUT OF SCOPE
This provides clear boundaries for implementation.
## Notes
- Specification is complete and ready for planning phase
- No clarifications needed from user (all decisions made with reasonable defaults)
- Feature aligns with Platform Vision Milestone 1
- Dependencies clearly identified for implementation planning
- Edge cases provide guidance for error handling design
## Recommendation
**PROCEED TO PLANNING**: Specification meets all quality criteria and is ready for `/speckit.plan`.
The spec successfully balances:
- Completeness (all required information present)
- Clarity (unambiguous requirements)
- Feasibility (realistic scope for MVP)
- Flexibility (identified future enhancements)

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# Configuration Contract: mautrix-slack Bridge
# This contract defines the expected NixOS configuration structure for the
# Slack↔Matrix bridge deployment. It serves as a specification for how the
# bridge should be configured in hosts/ops-jrz1.nix.
# =============================================================================
# NixOS Module Configuration (hosts/ops-jrz1.nix)
# =============================================================================
services:
mautrix-slack:
enable: true # Enable the bridge service
# Matrix Homeserver Configuration
# --------------------------------
# Connects the bridge to the local Matrix homeserver (conduwuit)
matrix:
homeserverUrl: "http://127.0.0.1:8008"
# Type: URL
# Description: Matrix homeserver client-server API endpoint
# Default: "http://127.0.0.1:8008"
# Notes: Use localhost since bridge and homeserver are on same host
serverName: "clarun.xyz"
# Type: domain
# Description: Matrix server domain for user IDs and room aliases
# Default: null (required)
# Notes: Must match homeserver configuration
# Database Configuration
# ----------------------
# PostgreSQL connection for bridge state storage
database:
type: "postgres"
# Type: enum ["postgres", "sqlite"]
# Description: Database backend type
# Default: "postgres"
# Notes: PostgreSQL recommended for production
uri: "postgresql:///mautrix_slack?host=/run/postgresql"
# Type: URI
# Description: Database connection string
# Default: "postgresql:///mautrix_slack?host=/run/postgresql"
# Format: postgresql://[user[:password]@][host][:port]/dbname[?params]
# Notes:
# - Empty user/password uses peer authentication
# - Unix socket via /run/postgresql (no network exposure)
# - Database created by dev-services.nix
maxOpenConnections: 32
# Type: integer
# Description: Maximum concurrent database connections
# Default: 32
maxIdleConnections: 4
# Type: integer
# Description: Maximum idle connections in pool
# Default: 4
# Appservice Configuration
# ------------------------
# Matrix application service protocol settings
appservice:
hostname: "127.0.0.1"
# Type: string
# Description: Bind address for appservice HTTP server
# Default: "127.0.0.1"
# Notes: Localhost-only (homeserver is local)
port: 29319
# Type: integer (1024-65535)
# Description: Port for appservice HTTP server
# Default: 29319
# Notes: Must be unique per bridge instance
id: "slack"
# Type: string
# Description: Appservice identifier in registration file
# Default: "slack"
# Notes: Must match registration.yaml
senderLocalpart: "slackbot"
# Type: string
# Description: Localpart for bridge bot user
# Default: "slackbot"
# Results in: @slackbot:clarun.xyz
userPrefix: "slack_"
# Type: string
# Description: Prefix for ghost user IDs
# Default: "slack_"
# Results in: @slack_U123ABC:clarun.xyz
botDisplayName: "Slack Bridge Bot"
# Type: string
# Description: Display name for bridge bot
# Default: "Slack Bridge Bot"
# Optional: Can be customized for branding
botAvatar: ""
# Type: mxc:// URL or empty string
# Description: Avatar for bridge bot
# Default: ""
# Optional: Set after deployment via Matrix client
# Bridge Behavior Configuration
# ------------------------------
# Controls bridge-specific functionality
bridge:
commandPrefix: "!slack"
# Type: string
# Description: Prefix for bridge bot commands
# Default: "!slack"
# Usage: "!slack help", "!slack status"
permissions:
"clarun.xyz": "user"
# Type: map[domain]permission_level
# Description: Access control by homeserver domain
# Levels: "relay", "user", "admin"
# Notes:
# - "relay": Can use relay mode (bot posts on behalf)
# - "user": Can login and bridge their own chats
# - "admin": Can manage bridge, access all portals
# Example for multiple domains:
# "clarun.xyz": "user"
# "example.com": "relay"
# "admin.clarun.xyz": "admin"
# Encryption Configuration
# ------------------------
# End-to-end encryption support in Matrix rooms
encryption:
enable: true
# Type: boolean
# Description: Allow bridge to participate in encrypted rooms
# Default: true
# Notes: Requires crypto dependencies (already in package)
default: false
# Type: boolean
# Description: Enable encryption by default for new portals
# Default: false
# Notes: Can cause issues with search/backfill
require: false
# Type: boolean
# Description: Require encryption for all portals
# Default: false
# Notes: Set true for high-security deployments
# Logging Configuration
# ---------------------
# Service logging settings
logging:
level: "info"
# Type: enum ["debug", "info", "warn", "error"]
# Description: Minimum log level to output
# Default: "info"
# Notes:
# - Use "debug" for initial deployment troubleshooting
# - Use "info" for production
# - Logs viewable via: journalctl -u mautrix-slack -f
# =============================================================================
# Generated config.yaml Structure (for reference)
# =============================================================================
# The following represents the actual config.yaml generated by the NixOS
# module. This is NOT directly edited; it's created from the NixOS options above.
# homeserver:
# address: "http://127.0.0.1:8008"
# domain: "clarun.xyz"
# software: "standard" # Auto-detected
# status_endpoint: null
# message_send_checkpoint_endpoint: null
# async_media: false
# websocket: false
# ping_interval_seconds: 0
# appservice:
# address: "http://127.0.0.1:29319"
# hostname: "127.0.0.1"
# port: 29319
# id: "slack"
# bot:
# username: "slackbot"
# displayname: "Slack Bridge Bot"
# avatar: ""
# ephemeral_events: true
# async_transactions: false
# as_token: "generated-from-registration"
# hs_token: "generated-from-registration"
# database:
# type: "postgres"
# uri: "postgresql:///mautrix_slack?host=/run/postgresql"
# max_open_conns: 32
# max_idle_conns: 4
# max_conn_idle_time: null
# max_conn_lifetime: null
# bridge:
# username_template: "slack_{{.}}"
# displayname_template: "{{.RealName}} (S)"
# bot_messages_as_notices: true
# bridge_matrix_leave: true
# sync_with_custom_puppets: true
# sync_direct_chat_list: false
# double_puppet_server_map: {}
# double_puppet_allow_discovery: false
# login_shared_secret_map: {}
# command_prefix: "!slack"
# management_room_text:
# welcome: "Hello, I'm a Slack bridge bot."
# connected: "Successfully logged into Slack."
# not_connected: "This bridge is not logged in. Use `login` to log in."
# encryption:
# allow: true
# default: false
# require: false
# appservice: false
# allow_key_sharing: false
# permissions:
# "clarun.xyz": "user"
# relay:
# enabled: false
# admin_only: true
# message_handling_timeout:
# error_after: 0s
# deadline: 120s
# slack:
# # Credentials NOT in config file
# # Provided via `login app` command interactively
# # Stored in database after authentication
# conversation_count: 10 # Number of recent chats to sync on login
# logging:
# min_level: "info"
# writers:
# - type: "stdout"
# format: "pretty-colored"
# time_format: " "
# print_level: "debug"
# file_name_format: ""
# file_date_format: "2006-01-02"
# file_mode: 384
# timestamp_format: "Jan _2, 2006 15:04:05"
# print_json: false
# =============================================================================
# Configuration Validation Checklist
# =============================================================================
# Before deployment, verify:
# [ ] services.mautrix-slack.enable = true
# [ ] matrix.serverName matches homeserver configuration
# [ ] database.uri points to existing PostgreSQL database
# [ ] appservice.port is unique (not used by other services)
# [ ] bridge.permissions includes homeserver domain
# [ ] Secrets NOT in config (tokens provided via interactive login)
# [ ] logging.level set appropriately (debug for initial deploy, info for production)
# After deployment, verify:
# [ ] Service started: systemctl status mautrix-slack
# [ ] Logs show no errors: journalctl -u mautrix-slack -n 50
# [ ] Registration file created: ls -l /var/lib/matrix-appservices/mautrix_slack_registration.yaml
# [ ] Database has tables: sudo -u mautrix_slack psql mautrix_slack -c '\dt'
# [ ] Bot user registered in Matrix: DM with @slackbot:clarun.xyz works
# =============================================================================
# Related Files
# =============================================================================
# NixOS Module: /home/dan/proj/ops-jrz1/modules/mautrix-slack.nix
# Host Config: /home/dan/proj/ops-jrz1/hosts/ops-jrz1.nix
# Service Config: /home/dan/proj/ops-jrz1/modules/dev-services.nix (database provisioning)
# Secrets: /home/dan/proj/ops-jrz1/secrets/secrets.yaml (sops-encrypted)
# Registration: /var/lib/matrix-appservices/mautrix_slack_registration.yaml (runtime)
# Generated Config: /var/lib/mautrix_slack/config/config.yaml (runtime)
# =============================================================================
# Version Information
# =============================================================================
# Contract Version: 1.0
# Created: 2025-10-22
# mautrix-slack Version: Latest from nixpkgs-unstable
# NixOS Version: 24.05+
# Last Updated: 2025-10-22

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# Channel Mapping Contract: Slack↔Matrix Portal Configuration
# This contract documents how Slack channels map to Matrix rooms in the
# mautrix-slack bridge. Unlike traditional bridges with static channel mappings,
# mautrix-slack uses **automatic portal creation** based on activity.
# =============================================================================
# Automatic Portal Creation Model
# =============================================================================
# mautrix-slack does NOT use static configuration files for channel mappings.
# Instead, portals (Slack channel ↔ Matrix room pairs) are created automatically
# based on:
#
# 1. Initial Login: Bridge syncs recent conversations (controlled by conversation_count)
# 2. Message Receipt: Portal auto-created when message arrives in new Slack channel
# 3. Bot Membership: Channels where Slack bot is invited are auto-bridged
#
# This contract documents the EXPECTED structure for understanding operational
# behavior, not a configuration file to be edited.
# =============================================================================
# Portal Lifecycle
# =============================================================================
portal_lifecycle:
creation_triggers:
- event: "Initial authentication (`login app` command)"
action: "Bridge syncs N recent conversations (conversation_count)"
portals_created: "Up to conversation_count channels/DMs"
user_experience: "User receives Matrix room invitations"
- event: "Message received in unbridged Slack channel"
action: "Bridge auto-creates portal"
portals_created: "1 new portal for that channel"
user_experience: "Invitation to new Matrix room, message appears"
- event: "Slack bot invited to channel (App Login mode)"
action: "Bridge auto-creates portal"
portals_created: "1 new portal"
user_experience: "Matrix users can now interact with channel"
destruction_triggers:
- event: "Admin runs `delete-portal` command (if available)"
action: "Bridge kicks users from Matrix room, deletes room, removes DB entry"
result: "Portal destroyed, can be recreated if needed"
- event: "Slack channel deleted"
expected: "Portal becomes inactive (not documented behavior)"
recommendation: "Test in pilot deployment to confirm"
state_changes:
- from: "Nonexistent"
to: "Active"
trigger: "Any creation trigger above"
- from: "Active"
to: "Archived"
trigger: "Slack channel archived"
behavior: "Read-only, no new messages flow"
- from: "Archived"
to: "Active"
trigger: "Slack channel unarchived"
- from: "Active"
to: "Deleted"
trigger: "delete-portal command or Slack channel deleted"
# =============================================================================
# Portal Entity Structure
# =============================================================================
# Stored in bridge PostgreSQL database (table: portal)
portal_entity:
slack_channel_id:
type: "string"
format: "C[A-Z0-9]{8,10}" # Public channel
example: "C0123ABCDEF"
primary_key: true
description: "Slack channel identifier"
slack_channel_type:
type: "enum"
values:
- "public_channel" # Standard public channel
- "private_channel" # Private channel (groups)
- "dm" # 1:1 direct message
- "mpim" # Multi-party direct message (group DM)
- "connect" # Slack Connect shared channel
description: "Type of Slack conversation"
matrix_room_id:
type: "string"
format: "!([a-zA-Z0-9]+):clarun.xyz"
example: "!AbCdEfGhIjKlMnOp:clarun.xyz"
description: "Matrix room identifier (opaque ID)"
matrix_room_alias:
type: "string"
format: "#slack_([a-z0-9_-]+):clarun.xyz"
example: "#slack_dev-platform:clarun.xyz"
description: "Human-readable Matrix room alias"
notes:
- "Based on Slack channel name"
- "Lowercase, hyphens preserved, special chars removed"
- "May not exist for DMs"
channel_name:
type: "string"
example: "dev-platform"
description: "Slack channel name (without #)"
notes: "Synced from Slack, updated on channel rename"
topic:
type: "string"
example: "Platform development discussion"
description: "Channel topic/description"
synced: true
notes: "Updated when Slack topic changes"
avatar_url:
type: "mxc:// URI"
example: "mxc://clarun.xyz/AbCdEfGhIjKlMnOpQrStUvWxYz"
description: "Matrix Content URI for channel avatar"
notes: "Synced from Slack workspace icon"
encrypted:
type: "boolean"
default: false
description: "Whether Matrix room has encryption enabled"
notes: "Controlled by bridge.encryption.default config"
in_space:
type: "boolean"
default: false
description: "Whether portal is in a Matrix Space"
notes: "Spaces not commonly used for bridge portals"
members:
type: "list[string]"
example: ["U0123ABC", "U0456DEF", "U0789GHI"]
description: "Slack user IDs of channel members"
synced: true
notes: "Updated when users join/leave channel"
created_at:
type: "timestamp"
example: "2025-10-22T14:30:00Z"
description: "When portal was created in bridge"
last_activity:
type: "timestamp"
example: "2025-10-22T15:45:30Z"
description: "Timestamp of last message in portal"
notes: "Used for health monitoring"
# =============================================================================
# Example Portal Mappings
# =============================================================================
# Example 1: Public Channel
# --------------------------
example_public_channel:
slack:
channel_id: "C05N2EXAMPLE"
channel_name: "dev-platform"
workspace: "chochacho"
url: "https://chochacho.slack.com/archives/C05N2EXAMPLE"
type: "public_channel"
members: 12
topic: "Platform infrastructure development"
matrix:
room_id: "!xYzAbCdEfGhIjKlM:clarun.xyz"
room_alias: "#slack_dev-platform:clarun.xyz"
display_name: "dev-platform (Slack)"
topic: "Platform infrastructure development"
encrypted: false
members:
- "@alice:clarun.xyz" # Real Matrix user
- "@slack_U0123ABC:clarun.xyz" # Ghost user (John from Slack)
- "@slack_U0456DEF:clarun.xyz" # Ghost user (Jane from Slack)
- "@slackbot:clarun.xyz" # Bridge bot
portal_metadata:
created_at: "2025-10-22T14:00:00Z"
last_activity: "2025-10-22T16:30:00Z"
message_count: 427
state: "active"
# Example 2: Private Channel
# ---------------------------
example_private_channel:
slack:
channel_id: "G05N2EXAMPLE" # Private channels start with G
channel_name: "leadership-team"
workspace: "chochacho"
type: "private_channel"
members: 5
topic: "Leadership discussions"
matrix:
room_id: "!aBcDeFgHiJkLmNoP:clarun.xyz"
room_alias: "#slack_leadership-team:clarun.xyz"
display_name: "leadership-team (Slack)"
topic: "Leadership discussions"
encrypted: true # High-security channel
members:
- "@alice:clarun.xyz"
- "@bob:clarun.xyz"
- "@slack_U0789GHI:clarun.xyz"
- "@slackbot:clarun.xyz"
portal_metadata:
created_at: "2025-10-22T14:05:00Z"
last_activity: "2025-10-22T15:00:00Z"
message_count: 89
state: "active"
# Example 3: Direct Message
# --------------------------
example_direct_message:
slack:
channel_id: "D05N2EXAMPLE" # DMs start with D
workspace: "chochacho"
type: "dm"
members: 2 # Alice (Matrix) and John (Slack)
matrix:
room_id: "!qRsTuVwXyZaBcDeF:clarun.xyz"
room_alias: null # DMs don't have aliases
display_name: "John Doe (Slack DM)"
encrypted: false
members:
- "@alice:clarun.xyz"
- "@slack_U0123ABC:clarun.xyz" # John
- "@slackbot:clarun.xyz"
portal_metadata:
created_at: "2025-10-22T14:10:00Z"
last_activity: "2025-10-22T16:45:00Z"
message_count: 52
state: "active"
# Example 4: Archived Channel
# ----------------------------
example_archived_channel:
slack:
channel_id: "C05N2OLDCHAN"
channel_name: "old-project"
workspace: "chochacho"
type: "public_channel"
archived: true
members: 0 # All members removed when archived
matrix:
room_id: "!gHiJkLmNoPqRsTuV:clarun.xyz"
room_alias: "#slack_old-project:clarun.xyz"
display_name: "old-project (Slack) [ARCHIVED]"
topic: "[Archived] Old project discussions"
encrypted: false
members:
- "@slackbot:clarun.xyz" # Only bot remains
portal_metadata:
created_at: "2025-08-15T10:00:00Z"
last_activity: "2025-10-01T12:00:00Z" # Before archival
message_count: 1543
state: "archived"
# =============================================================================
# Configuration Parameters (config.yaml)
# =============================================================================
# The only configuration parameter affecting portal creation:
conversation_count:
type: "integer"
default: 10
description: "Number of recent Slack conversations to sync on initial login"
location: "config.yaml → slack.conversation_count"
behavior:
- "Set to 10: Sync 10 most recent channels/DMs"
- "Set to 0: No initial sync (portals created on-demand only)"
- "Set to 100: Sync 100 recent conversations (may be slow)"
recommendation: "Start with 10 for testing, adjust based on team size"
# No other static channel mapping configuration exists.
# =============================================================================
# Operational Commands (via Matrix DM with @slackbot:clarun.xyz)
# =============================================================================
# Note: These commands are inferred from other mautrix bridges and may not
# all be available in mautrix-slack. Verify with `help` command.
commands:
- command: "help"
description: "Display available bridge commands"
usage: "help"
- command: "login app"
description: "Authenticate bridge with Slack app credentials"
usage: "login app"
prompts:
- "Please provide bot token (xoxb-...)"
- "Please provide app token (xapp-...)"
- command: "logout"
description: "Disconnect bridge from Slack"
usage: "logout"
effect: "All portals become inactive until re-login"
- command: "delete-portal"
description: "Remove portal for current room (if available)"
usage: "delete-portal"
context: "Send from within a bridged portal room"
effect: "Kicks users, deletes Matrix room, removes from database"
- command: "sync"
description: "Re-sync portals from Slack (if available)"
usage: "sync"
effect: "Creates portals for newly joined Slack channels"
- command: "status"
description: "Display bridge connection status (if available)"
usage: "status"
expected_output:
- "Connection: Connected"
- "Workspace: chochacho"
- "Portals: 12 active"
- "Last message: 30 seconds ago"
# =============================================================================
# Gradual Rollout Strategy
# =============================================================================
# Phase 1: Single Test Channel (Week 1-2)
# ----------------------------------------
phase_1:
goal: "Validate bridge functionality with minimal scope"
conversation_count: 5 # Limit initial sync
channels:
- slack_channel: "#dev-platform"
matrix_room: "#slack_dev-platform:clarun.xyz"
members: ["@alice:clarun.xyz", "@bob:clarun.xyz"]
purpose: "Testing all bridge features"
success_criteria:
- "Messages flow bidirectionally within 5 seconds"
- "Reactions, edits, deletes sync correctly"
- "File attachments work"
- "No service crashes or errors"
# Phase 2: Small User Group (Week 3-4)
# -------------------------------------
phase_2:
goal: "Test multi-user shared portals"
conversation_count: 10
channels:
- "#dev-platform"
- "#general"
- "#random"
users: 5
success_criteria:
- "Multiple Matrix users can interact in same portal"
- "Ghost users appear correctly"
- "Performance acceptable with 5 users"
- "No conflicts or race conditions"
# Phase 3: Organic Expansion (Week 5+)
# -------------------------------------
phase_3:
goal: "Full team adoption"
conversation_count: 20 # Increase as confidence grows
channels: "Auto-created based on activity"
users: "All team members (2-5)"
approach:
- "Don't pre-configure channel lists"
- "Let users authenticate individually"
- "Portals created organically as users interact"
- "Monitor health metrics"
success_criteria:
- "99% uptime over 7 days"
- "All messages delivered within 5 seconds"
- "User feedback positive"
- "No operational issues"
# =============================================================================
# Monitoring Portal Health
# =============================================================================
# Health indicators per portal (from data-model.md):
health_indicators:
connection_status:
values: ["connected", "disconnected", "refreshing"]
source: "Service logs"
alert: "If disconnected > 5 minutes"
last_successful_message:
type: "timestamp"
source: "portal.last_activity in database"
alert: "If > 1 hour old in active channel"
error_count:
type: "integer"
source: "Service logs (ERROR level)"
alert: "If > 10 errors in 10 minutes"
portal_count:
type: "integer"
source: "SELECT COUNT(*) FROM portal"
expected: "Grows organically, typically 5-20 for small team"
ghost_user_count:
type: "integer"
source: "SELECT COUNT(*) FROM puppet"
expected: "One per Slack user in bridged channels"
# Monitoring queries:
monitoring_queries:
- name: "List active portals"
query: |
SELECT slack_channel_id, mxid, name, topic
FROM portal
WHERE state = 'active'
ORDER BY last_activity DESC;
- name: "Find stale portals"
query: |
SELECT slack_channel_id, name, last_activity
FROM portal
WHERE last_activity < NOW() - INTERVAL '7 days'
ORDER BY last_activity ASC;
- name: "Count messages today"
query: |
SELECT COUNT(*)
FROM message
WHERE timestamp >= CURRENT_DATE;
# =============================================================================
# Troubleshooting Portal Issues
# =============================================================================
troubleshooting:
- issue: "Portal not created for Slack channel"
checks:
- "Verify bridge is authenticated (status command)"
- "Check if message was received (look for Slack event in logs)"
- "Verify bot has access to channel (App Login mode)"
- "Check bridge logs for errors"
resolution: "Send message in Slack channel to trigger portal creation"
- issue: "Messages not appearing in Matrix"
checks:
- "Verify Socket Mode connection active"
- "Check last_successful_message timestamp"
- "Look for relay errors in logs"
- "Verify homeserver is reachable"
resolution: "Check journalctl -u mautrix-slack for specific errors"
- issue: "Messages not appearing in Slack"
checks:
- "Verify bot token valid (test with Slack API)"
- "Check bot is member of channel"
- "Look for Slack API errors in logs"
- "Verify rate limits not exceeded"
resolution: "Re-invite bot to channel if needed"
- issue: "Portal shows as archived when channel is active"
checks:
- "Verify channel not actually archived in Slack"
- "Check portal state in database"
- "Look for Slack channel status sync errors"
resolution: "Unarchive in Slack, may need to re-sync portal"
# =============================================================================
# Related Documentation
# =============================================================================
# mautrix-slack Docs: https://docs.mau.fi/bridges/go/slack/
# Matrix Spaces: https://matrix.org/docs/guides/spaces
# Portal Pattern: https://matrix.org/docs/older/types-of-bridging/#portal-bridging
# =============================================================================
# Version Information
# =============================================================================
# Contract Version: 1.0
# Created: 2025-10-22
# Last Updated: 2025-10-22
# Related Spec: 002-slack-bridge-integration/spec.md
# Portal Model: Automatic creation (no static mapping)

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# Secrets Schema Contract: Slack Bridge Credentials
# This contract defines the structure and handling of sensitive credentials
# required for the Slack↔Matrix bridge. All secrets are managed via sops-nix
# with age encryption.
# =============================================================================
# Secret Definitions
# =============================================================================
secrets:
slack-oauth-token:
description: "Slack bot user OAuth token for API operations"
format: "xoxb-[workspace_id]-[token_id]-[secret]"
example: "xoxb-1234567890-1234567890123-AbCdEfGhIjKlMnOpQrStUvWx"
required: true
sensitivity: "high"
scope: "Bot token scopes (29 scopes from app manifest)"
usage: "Provided during `login app` interactive authentication"
rotation: "Manual via Slack app settings → Reinstall app"
storage:
- location: "sops-encrypted secrets.yaml (backup/recovery)"
- location: "Bridge PostgreSQL database (primary storage after login)"
validation:
- "Starts with 'xoxb-'"
- "Length: 50-100 characters"
- "Format: xoxb-[numbers]-[numbers]-[alphanumeric]"
revocation:
- "Slack app settings → OAuth & Permissions → Revoke"
- "Remove app from workspace"
slack-app-token:
description: "Slack app-level token for Socket Mode WebSocket connection"
format: "xapp-[level]-[workspace_id]-[token_id]-[secret]"
example: "xapp-1-A0123456789-1234567890123-abc123def456ghi789jkl012mno345pqr678stu901vwx234yz"
required: true
sensitivity: "high"
scope: "connections:write (Socket Mode)"
usage: "Provided during `login app` interactive authentication"
rotation: "Manual via Slack app settings → App-Level Tokens → Regenerate"
storage:
- location: "sops-encrypted secrets.yaml (backup/recovery)"
- location: "Bridge PostgreSQL database (primary storage after login)"
validation:
- "Starts with 'xapp-'"
- "Length: 80-120 characters"
- "Contains workspace identifier"
revocation:
- "Slack app settings → App-Level Tokens → Revoke"
# =============================================================================
# sops-nix Configuration
# =============================================================================
# File: secrets/secrets.yaml (encrypted)
# ----------------
slack-oauth-token: "ENC[AES256_GCM,data:...,type:str]"
slack-app-token: "ENC[AES256_GCM,data:...,type:str]"
# Age Keys (.sops.yaml)
# ---------------------
keys:
- &vultr_vps age1vuxcwvdvzl2u7w6kudqvnnf45czrnhwv9aevjq9hyjjpa409jvkqhkz32q
# Source: /etc/ssh/ssh_host_ed25519_key on VPS
# Conversion: ssh-to-age < ssh_host_ed25519_key.pub
# Purpose: Production VPS can decrypt secrets at boot
- &admin age18ue40q4fw8uggdlfag7jf5nrawvfvsnv93nurschhuynus200yjsd775v3
# Source: Admin workstation age key
# Purpose: Administrator can edit secrets locally
# Encryption Rules
# ----------------
creation_rules:
- path_regex: secrets/secrets\.yaml$
key_groups:
- age:
- *vultr_vps # VPS auto-decrypts at boot
- *admin # Admin can sops secrets/secrets.yaml
# =============================================================================
# NixOS Declaration (hosts/ops-jrz1.nix)
# =============================================================================
# NOTE: With interactive login approach, these secret declarations are NOT
# required. Tokens are provided via Matrix chat and stored in database.
# The declarations below are for backup/recovery purposes only.
# sops:
# defaultSopsFile: ../secrets/secrets.yaml
# age:
# sshKeyPaths: ["/etc/ssh/ssh_host_ed25519_key"]
#
# secrets:
# slack-oauth-token:
# owner: "mautrix_slack"
# group: "mautrix_slack"
# mode: "0440"
# # Runtime location: /run/secrets/slack-oauth-token
# # Decrypted at boot, available only to mautrix_slack user
#
# slack-app-token:
# owner: "mautrix_slack"
# group: "mautrix_slack"
# mode: "0440"
# # Runtime location: /run/secrets/slack-app-token
# # Decrypted at boot, available only to mautrix_slack user
# =============================================================================
# Runtime Secret Locations
# =============================================================================
# After sops-nix decryption (boot time):
# /run/secrets/slack-oauth-token
# - Permissions: 0440 (-r--r-----)
# - Owner: mautrix_slack:mautrix_slack
# - Storage: tmpfs (RAM-only, cleared on reboot)
# - Usage: NOT used with interactive login approach
# - Purpose: Backup for disaster recovery
# /run/secrets/slack-app-token
# - Permissions: 0440 (-r--r-----)
# - Owner: mautrix_slack:mautrix_slack
# - Storage: tmpfs (RAM-only, cleared on reboot)
# - Usage: NOT used with interactive login approach
# - Purpose: Backup for disaster recovery
# Bridge Database (runtime, primary storage):
# /var/lib/mautrix_slack/mautrix_slack.db (or PostgreSQL)
# - Table: "user"
# - Columns: mxid, slack_user_id, access_token (encrypted)
# - Storage: Persistent, survives reboots
# - Encryption: Filesystem-level (LUKS)
# - Usage: Active tokens after `login app` authentication
# =============================================================================
# Token Generation Process
# =============================================================================
# Step 1: Create Slack App
# -------------------------
# 1. Go to: https://api.slack.com/apps
# 2. Click "Create New App" → "From an app manifest"
# 3. Select workspace: "chochacho"
# 4. Paste manifest from: https://github.com/mautrix/slack/blob/main/app-manifest.yaml
# 5. Review scopes (29 bot scopes, 46 event subscriptions)
# 6. Click "Create"
# Step 2: Enable Socket Mode
# ---------------------------
# 1. In app settings → "Socket Mode"
# 2. Toggle "Enable Socket Mode" → ON
# 3. Click "Generate an app-level token"
# 4. Token name: "socket-mode-token"
# 5. Add scope: "connections:write"
# 6. Click "Generate"
# 7. Copy token (starts with "xapp-") → Save securely
# Step 3: Install App to Workspace
# ---------------------------------
# 1. In app settings → "Install App"
# 2. Click "Install to Workspace"
# 3. Review permissions (29 scopes)
# 4. Click "Allow"
# 5. Copy "Bot User OAuth Token" (starts with "xoxb-") → Save securely
# Step 4: Store Tokens in sops-nix (Optional, for backup)
# --------------------------------------------------------
# 1. Edit encrypted secrets file:
# sops secrets/secrets.yaml
#
# 2. Add tokens:
# slack-oauth-token: "xoxb-..."
# slack-app-token: "xapp-..."
#
# 3. Save (auto-encrypts with age keys)
# 4. Commit to git (encrypted version is safe)
# 5. Deploy configuration (secrets decrypted at boot)
# Step 5: Authenticate Bridge (Primary Method)
# ---------------------------------------------
# 1. Open Matrix client (Element, etc.)
# 2. Start DM with: @slackbot:clarun.xyz
# 3. Send command: "login app"
# 4. Bot prompts: "Please provide bot token"
# 5. Send: "xoxb-..." (paste bot token)
# 6. Bot prompts: "Please provide app token"
# 7. Send: "xapp-..." (paste app token)
# 8. Bot responds: "Successfully logged in" (or error)
# 9. Tokens stored in bridge database (persistent)
# =============================================================================
# Security Best Practices
# =============================================================================
security:
storage:
- rule: "NEVER commit unencrypted tokens to git"
enforcement: ".gitignore excludes secrets.yaml.dec"
- rule: "NEVER hardcode tokens in NixOS configuration"
enforcement: "Use sops-nix or interactive login only"
- rule: "NEVER log tokens in plaintext"
enforcement: "mautrix bridges sanitize logs automatically"
access_control:
- rule: "Tokens only readable by service user"
enforcement: "owner: mautrix_slack, mode: 0440"
- rule: "Tokens cleared on reboot (tmpfs)"
enforcement: "/run/secrets on tmpfs filesystem"
- rule: "Tokens encrypted at rest in database"
enforcement: "LUKS encryption on /var filesystem"
rotation:
- frequency: "Every 90 days (recommended)"
process:
- "Generate new tokens in Slack app settings"
- "Update sops-encrypted secrets.yaml"
- "Re-authenticate bridge via `login app` command"
- "Verify functionality with test message"
- "Revoke old tokens in Slack"
- emergency:
- "If tokens compromised, revoke immediately in Slack"
- "Generate new tokens"
- "Re-authenticate bridge"
- "Review audit logs for unauthorized access"
monitoring:
- "Enable IP allowlisting in Slack app settings (if VPS has static IP)"
- "Monitor Slack app usage dashboard for anomalies"
- "Alert on authentication failures in bridge logs"
- "Track token usage via Slack audit logs (Enterprise Grid)"
# =============================================================================
# Disaster Recovery
# =============================================================================
# Scenario 1: Lost Tokens (Bridge Database Corrupted)
# ----------------------------------------------------
# If bridge database is lost but sops-encrypted secrets.yaml exists:
# 1. Restore from backup or re-deploy service
# 2. Tokens in sops-encrypted secrets.yaml can be retrieved
# 3. Re-authenticate via `login app` command
# 4. Bridge resumes operation
# Scenario 2: Lost Secrets File (Git Repository Intact)
# ------------------------------------------------------
# If secrets.yaml is lost but git repository exists:
# 1. Clone git repository (encrypted secrets.yaml present)
# 2. Decrypt on VPS (age key from SSH host key)
# 3. Extract tokens: sops -d secrets/secrets.yaml | grep slack
# 4. Re-authenticate bridge via `login app` command
# Scenario 3: Complete VPS Failure (Need to Regenerate)
# ------------------------------------------------------
# If VPS is destroyed and no backups exist:
# 1. Go to Slack app settings
# 2. Regenerate app-level token (old token revoked)
# 3. Reinstall app to workspace (new bot token generated)
# 4. Update sops-encrypted secrets.yaml with new tokens
# 5. Deploy to new VPS
# 6. Authenticate bridge via `login app` with new tokens
# Scenario 4: Workspace Migration (Slack → New Workspace)
# --------------------------------------------------------
# If migrating from "delpadtech" to "chochacho":
# 1. Create new Slack app in "chochacho" workspace
# 2. Generate new tokens (different workspace = different tokens)
# 3. Update NixOS config: workspace = "chochacho"
# 4. Update secrets.yaml with new tokens
# 5. Deploy configuration
# 6. Authenticate with new tokens
# 7. Old workspace bridge automatically disconnects
# =============================================================================
# Token Scope Reference
# =============================================================================
# Bot Token Scopes (xoxb-) - 29 Required
# ---------------------------------------
bot_scopes:
channels:
- "channels:read" # List public channels
- "channels:history" # Read messages in public channels
- "channels:write.invites" # Invite users to channels
- "channels:write.topic" # Edit channel topics
groups: # Private channels
- "groups:read"
- "groups:history"
- "groups:write"
- "groups:write.invites"
- "groups:write.topic"
im: # Direct messages
- "im:read"
- "im:history"
- "im:write"
- "im:write.topic"
mpim: # Group direct messages
- "mpim:read"
- "mpim:history"
- "mpim:write"
- "mpim:write.topic"
chat:
- "chat:write" # Send messages
- "chat:write.public" # Send to public channels without joining
- "chat:write.customize" # Customize bot name/avatar (for ghosting)
files:
- "files:read" # Download files
- "files:write" # Upload files
reactions:
- "reactions:read" # View reactions
- "reactions:write" # Add/remove reactions
pins:
- "pins:read" # View pinned messages
- "pins:write" # Pin/unpin messages
users:
- "users:read" # View user info
- "users.profile:read" # View user profiles
- "users:read.email" # View user emails
workspace:
- "team:read" # View workspace info
- "emoji:read" # View custom emoji
# App-Level Token Scopes (xapp-) - 1 Required
# --------------------------------------------
app_scopes:
- "connections:write" # Establish Socket Mode WebSocket connections
# =============================================================================
# Related Documentation
# =============================================================================
# Slack API Scopes: https://api.slack.com/scopes
# sops-nix: https://github.com/Mic92/sops-nix
# Age Encryption: https://age-encryption.org/
# mautrix-slack Auth: https://docs.mau.fi/bridges/go/slack/authentication.html
# =============================================================================
# Version Information
# =============================================================================
# Contract Version: 1.0
# Created: 2025-10-22
# Last Updated: 2025-10-22
# Related Spec: 002-slack-bridge-integration/spec.md
# Security Requirement: FR-007 (sops-nix encrypted secrets)

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# Data Model: Slack↔Matrix Bridge
**Feature**: 002-slack-bridge-integration
**Created**: 2025-10-22
**Status**: Design Complete
## Overview
This document defines the conceptual data model for the mautrix-slack bridge. Since this is infrastructure configuration (not application code), the model focuses on configuration entities, runtime state, and operational data flows.
**Key Insight**: Most data is managed internally by mautrix-slack (PostgreSQL database). Our model focuses on **configuration inputs** and **observable runtime state** relevant to NixOS deployment.
---
## 1. Configuration Entities
### 1.1 Bridge Service
**Description**: The mautrix-slack service instance
**Properties**:
| Property | Type | Source | Description |
|----------|------|--------|-------------|
| `workspace` | string | NixOS config | Slack workspace name ("chochacho") |
| `homeserverUrl` | URL | NixOS config | Matrix homeserver address (http://127.0.0.1:8008) |
| `serverName` | domain | NixOS config | Matrix server domain (clarun.xyz) |
| `databaseUri` | URI | NixOS config | PostgreSQL connection string |
| `port` | integer | NixOS config | Appservice listen port (29319) |
| `commandPrefix` | string | NixOS config | Bridge command prefix ("!slack") |
| `permissions` | map | NixOS config | Domain → permission level mappings |
| `loggingLevel` | enum | NixOS config | Log verbosity (debug/info/warn/error) |
| `conversationCount` | integer | config.yaml | Number of recent chats to sync on login |
**Lifecycle**:
- Created: NixOS configuration deployment
- Modified: Configuration updates → rebuild
- Destroyed: Service disabled in config
**State Transitions**: See section 3.1 (Bridge Service State Machine)
### 1.2 Slack Credentials
**Description**: Authentication tokens for Slack API
**Properties**:
| Property | Type | Source | Description |
|----------|------|--------|-------------|
| `botToken` | secret (xoxb-) | sops-nix → bridge DB | Slack bot OAuth token |
| `appToken` | secret (xapp-) | sops-nix → bridge DB | Slack app-level token (Socket Mode) |
| `workspace` | string | Interactive login | Slack workspace identifier (T...) |
**Lifecycle**:
- Created: Slack app configuration → manual token generation
- Stored: Provided via `login app` command → bridge database
- Rotated: Manual token regeneration → re-authentication
- Revoked: Slack app settings or user removes app
**Security Requirements**:
- Tokens never in Nix store (evaluation-time exposure risk)
- Tokens never in config.yaml (file permission risk)
- Tokens stored in bridge PostgreSQL database (encrypted at rest via LUKS)
- Optional: Encrypt in sops-nix for disaster recovery (not used by bridge directly)
### 1.3 Matrix Appservice Registration
**Description**: Matrix homeserver configuration for bridge integration
**Properties**:
| Property | Type | Source | Description |
|----------|------|--------|-------------|
| `id` | string | Generated | Appservice identifier ("slack") |
| `url` | URL | Generated | Bridge endpoint (http://127.0.0.1:29319) |
| `asToken` | secret | Generated | Appservice → homeserver auth |
| `hsToken` | secret | Generated | Homeserver → appservice auth |
| `senderLocalpart` | string | Generated | Bot user localpart ("slackbot") |
| `usernameTemplate` | string | Generated | Ghost user format ("slack_{{.}}") |
| `namespaces.users` | list | Generated | Reserved user namespaces |
**Lifecycle**:
- Created: First service start (`mautrix-slack -g -r registration.yaml`)
- Modified: Rarely (only on namespace changes)
- Consumed: Loaded by Matrix homeserver (conduwuit)
**File Location**: `/var/lib/matrix-appservices/mautrix_slack_registration.yaml`
### 1.4 Channel Portal
**Description**: A bridged Slack channel ↔ Matrix room pair
**Properties** (stored in mautrix-slack database):
| Property | Type | Description |
|----------|------|-------------|
| `slackChannelId` | string | Slack channel ID (C...) |
| `matrixRoomId` | string | Matrix room ID (!...clarun.xyz) |
| `channelName` | string | Slack channel name (#dev-platform) |
| `roomAlias` | string | Matrix room alias (#slack_dev-platform:clarun.xyz) |
| `topic` | string | Channel topic/description |
| `members` | list | Slack users in channel |
| `encrypted` | boolean | Whether Matrix room is encrypted |
| `createdAt` | timestamp | Portal creation time |
| `lastActivity` | timestamp | Last message timestamp |
**Lifecycle**: See section 3.3 (Channel Portal State Machine)
**Observable via**:
- Matrix room list (user perspective)
- Bridge database queries (admin perspective)
- Bot command: `!slack status` (if implemented)
---
## 2. Runtime State Entities
### 2.1 Socket Mode Connection
**Description**: WebSocket connection to Slack's real-time messaging service
**Properties**:
| Property | Type | Description |
|----------|------|-------------|
| `websocketUrl` | URL | Dynamic WebSocket URL (wss://wss.slack.com/link/...) |
| `connectionState` | enum | disconnected / connecting / connected / refreshing |
| `connectionId` | string | Unique connection identifier |
| `connectedAt` | timestamp | When connection established |
| `refreshAt` | timestamp | Estimated refresh time (~2-4 hours) |
| `lastHeartbeat` | timestamp | Last ping/pong from Slack |
| `reconnectAttempts` | integer | Consecutive failed reconnection count |
| `rateLimit` | timestamp | Earliest next connection attempt (1/minute limit) |
**State Transitions**: See section 3.2 (Socket Mode Connection State Machine)
**Observable via**:
- Service logs: `journalctl -u mautrix-slack -f`
- Health indicators: Connection status, last successful message timestamp
### 2.2 Ghost User
**Description**: Matrix representation of a Slack user
**Properties**:
| Property | Type | Description |
|----------|------|-------------|
| `matrixUserId` | string | Ghost user MXID (@slack_U123ABC:clarun.xyz) |
| `slackUserId` | string | Slack user ID (U...) |
| `displayName` | string | Synced from Slack profile |
| `avatarUrl` | mxc:// | Synced from Slack avatar |
| `isBot` | boolean | Whether user is a bot account |
| `email` | string | Slack user email (if available) |
| `slackTeam` | string | Workspace identifier |
**Lifecycle**:
- Created: First message from Slack user in bridged channel
- Updated: Slack profile changes → synced to Matrix
- Deactivated: User leaves workspace (profile retained but inactive)
**Namespace**: `@slack_*:clarun.xyz` (reserved via appservice registration)
### 2.3 Message Event
**Description**: A bridged message in transit
**Properties**:
| Property | Type | Description |
|----------|------|-------------|
| `sourceService` | enum | slack / matrix |
| `sourceEventId` | string | Slack ts or Matrix event ID |
| `targetEventId` | string | Event ID in destination service |
| `messageType` | enum | text / image / file / reaction / edit / delete |
| `content` | object | Message payload (text, attachments, etc.) |
| `sender` | string | User ID in source service |
| `channel` | string | Portal ID |
| `timestamp` | timestamp | Message send time |
| `deliveredAt` | timestamp | When relayed to destination |
| `latency` | duration | deliveredAt - timestamp (should be <5s) |
**Lifecycle** (ephemeral):
- Received: Slack WebSocket event or Matrix /transactions POST
- Transformed: Format conversion (Slack JSON ↔ Matrix JSON)
- Sent: Posted to destination API
- Acknowledged: Event ID stored for deduplication
**Observable via**:
- Bridge logs (debug level)
- Health metrics: Message count, delivery latency
- Spec requirement: FR-001/FR-002 (5 second latency SLA)
---
## 3. State Machines
### 3.1 Bridge Service State Machine
```
┌─────────────┐
│ Disabled │ (services.mautrix-slack.enable = false)
└──────┬──────┘
│ nixos-rebuild switch (enable = true)
↓
┌─────────────┐
│ Starting │ ExecStartPre: Generate config, create registration
└──────┬──────┘
│ Config valid, database reachable
↓
┌─────────────┐
│Unauthenticated (service running, waiting for `login app`)
└──────┬──────┘
│ User sends `login app` command, provides tokens
↓
┌─────────────┐
│ Connecting │ Establishing Socket Mode WebSocket
└──────┬──────┘
│ WebSocket handshake successful
↓
┌─────────────┐
│ Active │ Normal operation (relaying messages)
└──┬─────┬────┘
│ │ Connection refresh (every ~2-4 hours)
│ └──→ Connecting (automatic reconnection)
│
│ Configuration error, auth revoked, database failure
↓
┌─────────────┐
│ Failed │ Service exits (systemd restarts after 10s)
└──────┬──────┘
│ systemd RestartSec expires
└──→ Starting
```
**Key Observations**:
- **Unauthenticated state is valid**: Service can run without Slack credentials
- **Automatic restart**: systemd handles crash recovery
- **Connection refresh is normal**: Not a failure state, automatic transition
### 3.2 Socket Mode Connection State Machine
```
┌─────────────┐
│Disconnected │ Initial state or after connection loss
└──────┬──────┘
│ Bridge has valid credentials
↓
┌─────────────┐
│Requesting URL Call apps.connections.open API
└──────┬──────┘
│ API returns wss:// URL (rate limit: 1/minute)
↓
┌─────────────┐
│ Connecting │ WebSocket handshake in progress
└──────┬──────┘
│ Receives "hello" message from Slack
↓
┌─────────────┐
│ Connected │ Receiving events, acknowledging with envelope_id
└──┬───┬───┬──┘
│ │ │ Slack sends "warning" disconnect (10s notice)
│ │ └──→ Refreshing
│ │
│ │ Network error, timeout, Slack backend restart
│ └──→ Disconnected (immediate reconnection attempt)
│
│ Normal operation continues
↓
┌─────────────┐
│ Refreshing │ Graceful connection renewal
└──────┬──────┘
│ Fetch new WebSocket URL
└──→ Requesting URL
```
**Error Paths**:
- **Rate limited**: Stay in Disconnected, retry after 1 minute
- **Auth invalid**: Transition to Failed (requires re-authentication)
- **Network partition**: Exponential backoff reconnection attempts
**Health Indicators**:
- `connection_status`: current state name
- `last_successful_message`: timestamp of last event
- `reconnection_attempts`: incremented on failed connections, reset on success
### 3.3 Channel Portal State Machine
```
┌─────────────┐
│ Pending │ User receives message in unbridged Slack channel
└──────┬──────┘
│ Bridge auto-creates portal
↓
┌─────────────┐
│ Creating │ Allocating Matrix room, sending invites
└──────┬──────┘
│ Room created, Matrix users invited
↓
┌─────────────┐
│ Active │ Relaying messages bidirectionally
└──┬───┬───┬──┘
│ │ │ Slack channel archived
│ │ └──→ Archived
│ │
│ │ Admin runs delete-portal command (if available)
│ └──→ Deleting
│
│ Normal message relay continues
↓
(Active - steady state)
┌─────────────┐
│ Archived │ Slack channel is read-only
└──────┬──────┘
│ Slack channel unarchived
└──→ Active
┌─────────────┐
│ Deleting │ Cleanup: kick users, delete room, remove from DB
└──────┬──────┘
│ Cleanup complete
↓
┌─────────────┐
│ Deleted │ Portal removed (can be recreated if needed)
└─────────────┘
```
**Key Properties by State**:
- **Pending**: Not yet in bridge database
- **Creating**: Room exists but membership incomplete
- **Active**: `lastActivity` updates on each message
- **Archived**: Read-only, no new messages flow
- **Deleted**: Database record removed, room unlinked
---
## 4. Relationships
### 4.1 Entity Relationship Diagram
```
┌──────────────────┐
│ Bridge Service │
└────────┬─────────┘
│ 1
│
│ manages
│
↓ N
┌──────────────────┐ ┌──────────────────┐
│ Socket Connection│←──────│ Slack Credentials│
└────────┬─────────┘ 1 └──────────────────┘
│ uses
│
│ receives events via
│
↓ N
┌──────────────────┐
│ Channel Portal │
└────────┬─────────┘
│ bridges
│
↓ N
┌──────────────────┐ ┌──────────────────┐
│ Message Event │───────│ Ghost User │
└──────────────────┘ from └──────────────────┘
│ N │ N
│ │
│ relays to │ represents
↓ 1 ↓ 1
┌──────────────────┐ ┌──────────────────┐
│ Matrix Room │ │ Slack User │
└──────────────────┘ └──────────────────┘
```
### 4.2 Cardinality Table
| Entity A | Relationship | Entity B | Cardinality | Notes |
|----------|--------------|----------|-------------|-------|
| Bridge Service | manages | Socket Connection | 1:1 | One WebSocket per bridge instance |
| Bridge Service | creates | Channel Portal | 1:N | Multiple channels bridged |
| Socket Connection | uses | Slack Credentials | 1:1 | Credentials shared across portals |
| Channel Portal | contains | Message Event | 1:N | Many messages per channel |
| Channel Portal | links | Matrix Room | 1:1 | Bidirectional mapping |
| Ghost User | sends | Message Event | 1:N | User can send many messages |
| Ghost User | represents | Slack User | 1:1 | One MXID per Slack user per workspace |
| Appservice Registration | reserves | Ghost User namespace | 1:N | All @slack_*:clarun.xyz |
---
## 5. Data Flow Diagrams
### 5.1 Message Flow: Slack → Matrix
```
Slack User
│ Posts message in #dev-platform
↓
Slack API (WebSocket event)
│ message.channels event
↓
mautrix-slack (Socket Mode listener)
│ 1. Acknowledge event (envelope_id)
│ 2. Check portal exists for channel
│ 3. Transform message format
│ 4. Lookup/create ghost user
↓
Matrix Homeserver (/_matrix/app/v1/transactions)
│ PUT transaction with event
↓
Matrix Room (#slack_dev-platform:clarun.xyz)
│ Event appears in room timeline
↓
Matrix Users
│ See message from @slack_john:clarun.xyz
```
**Latency Budget**: <5 seconds (FR-001)
**Failure Modes**:
- Portal doesn't exist → Auto-create, then deliver
- Ghost user doesn't exist → Create, set profile, then deliver
- Matrix homeserver unreachable → Retry with exponential backoff
- Event deduplication → Check Slack `ts` against database, skip if duplicate
### 5.2 Message Flow: Matrix → Slack
```
Matrix User (@alice:clarun.xyz)
│ Sends message in #slack_dev-platform:clarun.xyz
↓
Matrix Homeserver
│ Appservice transaction to bridge
↓
mautrix-slack (/_matrix/app/v1/transactions)
│ 1. Verify hs_token
│ 2. Lookup portal by room ID
│ 3. Transform message format
│ 4. Determine sender identity
↓
Slack API (chat.postMessage or chat.postEphemeral)
│ POST message to channel via bot token
↓
Slack Channel (#dev-platform)
│ Message appears from bridge bot
│ (with Matrix user's display name if using customization)
↓
Slack Users
│ See message: "Alice (Matrix): Hello from Matrix!"
```
**Latency Budget**: <5 seconds (FR-002)
**Failure Modes**:
- Portal not found → Log error, return 200 OK (avoid retry loop)
- Slack API rate limited → Queue message, retry with backoff
- Bot not in channel → Attempt to join, or return error to Matrix user
- Invalid message format → Send error reply to Matrix user
### 5.3 Authentication Flow
```
Admin (NixOS deployment)
│ 1. Deploy configuration (services.mautrix-slack.enable = true)
↓
NixOS Activation
│ 2. Start systemd service
↓
mautrix-slack service
│ 3. Generate config, start service
│ 4. Listen on port 29319
│ 5. State: Unauthenticated
↓
Admin (Matrix client)
│ 6. Open DM with @slackbot:clarun.xyz
│ 7. Send: "login app"
↓
mautrix-slack
│ 8. Prompt: "Please provide bot token"
↓
Admin
│ 9. Send: "xoxb-..."
↓
mautrix-slack
│ 10. Prompt: "Please provide app token"
↓
Admin
│ 11. Send: "xapp-..."
↓
mautrix-slack
│ 12. Store tokens in database
│ 13. Call apps.connections.open
│ 14. Establish WebSocket connection
│ 15. Sync recent conversations (conversation_count)
│ 16. State: Active
↓
Admin
│ 17. Receive success message
│ 18. Invited to bridged channel portals
```
**Security Notes**:
- Tokens transmitted over encrypted Matrix federation (TLS)
- Tokens stored in PostgreSQL database (LUKS-encrypted filesystem)
- Tokens never logged (mautrix bridges sanitize logs)
- Admin can revoke via Slack app settings
### 5.4 Portal Creation Flow
```
Slack User
│ Sends message in #general (not yet bridged)
↓
Slack API (WebSocket event)
│ message.channels event
↓
mautrix-slack
│ 1. Check database: portal exists for channel_id?
│ 2. Not found → Initiate auto-create
↓
Portal Creation Logic
│ 3. Create Matrix room via homeserver API
│ 4. Set room name, topic, avatar
│ 5. Insert portal record in database
│ 6. Map Slack channel ↔ Matrix room
↓
Membership Sync
│ 7. For each Slack member in channel:
│ - Create/update ghost user
│ - Invite ghost user to Matrix room
↓
Relay Message
│ 8. Transform and send original message
↓
Matrix Users
│ 9. Receive room invitation
│ 10. Join room, see first message
```
**Timing**: Portal creation adds ~2-5 seconds latency to first message
**Failure Recovery**:
- Room creation fails → Retry up to 3 times
- Ghost user creation fails → Skip that user, continue
- Database insert fails → Rollback, log error, retry
---
## 6. Database Schema (Conceptual)
**Note**: Actual schema managed by mautrix-slack. This is conceptual understanding for operational purposes.
### Key Tables
**`portal`**
```sql
CREATE TABLE portal (
slack_channel_id TEXT PRIMARY KEY, -- C0123ABC
mxid TEXT NOT NULL, -- !xyz:clarun.xyz
name TEXT, -- dev-platform
topic TEXT,
encrypted BOOLEAN DEFAULT FALSE,
in_space BOOLEAN DEFAULT FALSE,
avatar_url TEXT,
name_set BOOLEAN,
topic_set BOOLEAN,
avatar_set BOOLEAN
);
```
**`puppet`** (Ghost Users)
```sql
CREATE TABLE puppet (
slack_user_id TEXT PRIMARY KEY, -- U0123DEF
team_id TEXT, -- T0456GHI
mxid TEXT NOT NULL, -- @slack_john:clarun.xyz
display_name TEXT,
avatar_url TEXT,
name_set BOOLEAN,
avatar_set BOOLEAN,
contact_info_set BOOLEAN,
is_bot BOOLEAN,
custom_mxid TEXT -- For double-puppeting
);
```
**`user`** (Logged-in Matrix users)
```sql
CREATE TABLE "user" (
mxid TEXT PRIMARY KEY, -- @alice:clarun.xyz
slack_user_id TEXT, -- U789JKL (after login)
team_id TEXT, -- T0456GHI
access_token TEXT, -- Encrypted Slack token
management_room TEXT -- DM with bridge bot
);
```
**`message`** (Event mapping for edits/deletes)
```sql
CREATE TABLE message (
slack_ts TEXT, -- 1234567890.123456
slack_channel_id TEXT, -- C0123ABC
mxid TEXT, -- $event_id:clarun.xyz
UNIQUE(slack_ts, slack_channel_id)
);
```
**Queries Used**:
- Message relay: `SELECT mxid FROM portal WHERE slack_channel_id = ?`
- Ghost user lookup: `SELECT mxid FROM puppet WHERE slack_user_id = ?`
- Edit/delete: `SELECT mxid FROM message WHERE slack_ts = ? AND slack_channel_id = ?`
---
## 7. Configuration Data Flow
```
Git Repository (specs/002-slack-bridge-integration/)
│ Contains: spec.md, plan.md, data-model.md
↓
NixOS Configuration (hosts/ops-jrz1.nix)
│ services.mautrix-slack = { ... }
↓
NixOS Evaluation
│ Merges: modules/mautrix-slack.nix options
↓
ExecStartPre (Python script)
│ 1. Generate example config: mautrix-slack -e
│ 2. Merge configOverrides
│ 3. Write: /var/lib/mautrix_slack/config/config.yaml
↓
mautrix-slack service
│ Reads config.yaml on startup
↓
Runtime Behavior
│ Connects to Matrix, Slack, PostgreSQL
```
**Configuration Layers** (in order of precedence):
1. **Hardcoded defaults** (in mautrix-slack binary)
2. **Example config** (generated with `-e` flag)
3. **NixOS module overrides** (`configOverrides` option)
4. **User extraConfig** (`extraConfig` option)
5. **Runtime authentication** (tokens from `login app` command)
---
## 8. Observability Data
### Health Indicators (SC-003a)
| Metric | Source | Purpose |
|--------|--------|---------|
| `connection_status` | Service logs | Socket Mode connection state |
| `last_successful_message` | Service logs | Timestamp of last relayed message |
| `error_count` | Service logs | Count of errors since last restart |
| `portal_count` | Database query | Number of active channel portals |
| `ghost_user_count` | Database query | Number of Slack users bridged |
| `message_latency` | Bridge metrics | Time between source→destination (should be <5s) |
### Log Events
**Key log patterns** (from mautrix bridge codebase):
```
INFO [WebSocket] Connected to Slack via Socket Mode
INFO [Portal] Creating portal for channel #dev-platform (C0123ABC)
INFO [Message] Relaying message from Slack to Matrix: {...}
WARN [Connection] WebSocket disconnected, reconnecting in 5s
ERROR [Auth] Invalid bot token, authentication failed
```
**Monitoring Strategy**:
1. Use `journalctl -u mautrix-slack -f` for real-time monitoring
2. Export logs to persistent storage for analysis
3. Alert on `ERROR` level logs
4. Track `last_successful_message` metric (alert if >1 hour stale)
---
## 9. Document History
- **2025-10-22**: Initial data model design
- **Phase 1 Status**: ✅ Complete
- **Next**: Create contracts/ directory with schemas

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@ -0,0 +1,105 @@
# Implementation Plan: [FEATURE]
**Branch**: `[###-feature-name]` | **Date**: [DATE] | **Spec**: [link]
**Input**: Feature specification from `/specs/[###-feature-name]/spec.md`
**Note**: This template is filled in by the `/speckit.plan` command. See `.specify/templates/commands/plan.md` for the execution workflow.
## Summary
[Extract from feature spec: primary requirement + technical approach from research]
## Technical Context
<!--
ACTION REQUIRED: Replace the content in this section with the technical details
for the project. The structure here is presented in advisory capacity to guide
the iteration process.
-->
**Language/Version**: [e.g., Python 3.11, Swift 5.9, Rust 1.75 or NEEDS CLARIFICATION]
**Primary Dependencies**: [e.g., FastAPI, UIKit, LLVM or NEEDS CLARIFICATION]
**Storage**: [if applicable, e.g., PostgreSQL, CoreData, files or N/A]
**Testing**: [e.g., pytest, XCTest, cargo test or NEEDS CLARIFICATION]
**Target Platform**: [e.g., Linux server, iOS 15+, WASM or NEEDS CLARIFICATION]
**Project Type**: [single/web/mobile - determines source structure]
**Performance Goals**: [domain-specific, e.g., 1000 req/s, 10k lines/sec, 60 fps or NEEDS CLARIFICATION]
**Constraints**: [domain-specific, e.g., <200ms p95, <100MB memory, offline-capable or NEEDS CLARIFICATION]
**Scale/Scope**: [domain-specific, e.g., 10k users, 1M LOC, 50 screens or NEEDS CLARIFICATION]
## Constitution Check
*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
[Gates determined based on constitution file]
## Project Structure
### Documentation (this feature)
```
specs/[###-feature]/
├── plan.md # This file (/speckit.plan command output)
├── research.md # Phase 0 output (/speckit.plan command)
├── data-model.md # Phase 1 output (/speckit.plan command)
├── quickstart.md # Phase 1 output (/speckit.plan command)
├── contracts/ # Phase 1 output (/speckit.plan command)
└── tasks.md # Phase 2 output (/speckit.tasks command - NOT created by /speckit.plan)
```
### Source Code (repository root)
<!--
ACTION REQUIRED: Replace the placeholder tree below with the concrete layout
for this feature. Delete unused options and expand the chosen structure with
real paths (e.g., apps/admin, packages/something). The delivered plan must
not include Option labels.
-->
```
# [REMOVE IF UNUSED] Option 1: Single project (DEFAULT)
src/
├── models/
├── services/
├── cli/
└── lib/
tests/
├── contract/
├── integration/
└── unit/
# [REMOVE IF UNUSED] Option 2: Web application (when "frontend" + "backend" detected)
backend/
├── src/
│ ├── models/
│ ├── services/
│ └── api/
└── tests/
frontend/
├── src/
│ ├── components/
│ ├── pages/
│ └── services/
└── tests/
# [REMOVE IF UNUSED] Option 3: Mobile + API (when "iOS/Android" detected)
api/
└── [same as backend above]
ios/ or android/
└── [platform-specific structure: feature modules, UI flows, platform tests]
```
**Structure Decision**: [Document the selected structure and reference the real
directories captured above]
## Complexity Tracking
*Fill ONLY if Constitution Check has violations that must be justified*
| Violation | Why Needed | Simpler Alternative Rejected Because |
|-----------|------------|-------------------------------------|
| [e.g., 4th project] | [current need] | [why 3 projects insufficient] |
| [e.g., Repository pattern] | [specific problem] | [why direct DB access insufficient] |

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# Quickstart: Slack Bridge Deployment
**Feature**: 002-slack-bridge-integration
**Target Environment**: ops-jrz1 VPS (45.77.205.49)
**Estimated Time**: 30-45 minutes
## Overview
This guide provides step-by-step instructions for deploying the mautrix-slack bridge from scratch. Follow these steps in order to achieve a working Slack↔Matrix bridge.
**Prerequisites**:
- NixOS 24.05+ running on ops-jrz1 VPS
- Matrix homeserver (conduwuit) running on port 8008
- PostgreSQL running with mautrix_slack database
- Admin access to Slack workspace "chochacho"
- Matrix client (Element, etc.)
**Success Criteria**:
- ✅ Service running without errors
- ✅ Socket Mode connection established
- ✅ Test message flows Slack → Matrix within 5 seconds
- ✅ Test message flows Matrix → Slack within 5 seconds
---
## Phase 0: Pre-Deployment Checks
### 0.1 Verify Infrastructure
```bash
# SSH to VPS
ssh root@45.77.205.49
# Check Matrix homeserver running
systemctl status matrix-continuwuity
curl -s http://localhost:8008/_matrix/client/versions | jq .
# Check PostgreSQL running
systemctl status postgresql
sudo -u postgres psql -c '\l' | grep mautrix_slack
# Check database created
sudo -u postgres psql mautrix_slack -c '\dt'
# Expected: Empty (bridge will create tables on first run)
# Check existing bridge status
systemctl status mautrix-slack
# Expected: Inactive or running but not authenticated
```
**If checks fail**:
- Matrix homeserver not running → Start: `systemctl start matrix-continuwuity`
- Database doesn't exist → Created by dev-services.nix, redeploy configuration
- Other issues → Review recent worklogs in docs/worklogs/
### 0.2 Review Current Configuration
```bash
# Check current mautrix-slack configuration
cat /run/current-system/configuration.nix | grep -A 20 "mautrix-slack"
# Check if service is enabled
systemctl list-unit-files | grep mautrix-slack
```
**Current State** (as of 2025-10-22):
- Module exists: `modules/mautrix-slack.nix`
- Configured for "delpadtech" workspace (needs update)
- Service exits with code 11 (missing credentials)
---
## Phase 1: Slack App Configuration
### 1.1 Create Slack App
1. Open browser: https://api.slack.com/apps
2. Click **"Create New App"**
3. Choose **"From an app manifest"**
4. Select workspace: **"chochacho"**
### 1.2 Configure App Manifest
1. Paste the following manifest (from mautrix-slack):
```yaml
display_information:
name: Matrix Bridge
description: Bridge for Matrix↔Slack messaging
background_color: "#000000"
features:
bot_user:
display_name: Matrix Bridge
always_online: true
oauth_config:
scopes:
bot:
- channels:history
- channels:read
- channels:write.invites
- channels:write.topic
- chat:write
- chat:write.customize
- chat:write.public
- emoji:read
- files:read
- files:write
- groups:history
- groups:read
- groups:write
- groups:write.invites
- groups:write.topic
- im:history
- im:read
- im:write
- im:write.topic
- mpim:history
- mpim:read
- mpim:write
- mpim:write.topic
- pins:read
- pins:write
- reactions:read
- reactions:write
- team:read
- users.profile:read
- users:read
- users:read.email
settings:
event_subscriptions:
bot_events:
- app_uninstalled
- channel_archive
- channel_created
- channel_deleted
- channel_id_changed
- channel_left
- channel_rename
- channel_unarchive
- file_change
- file_deleted
- file_shared
- group_archive
- group_deleted
- group_left
- group_rename
- group_unarchive
- member_joined_channel
- member_left_channel
- message.channels
- message.groups
- message.im
- message.mpim
- pin_added
- pin_removed
- reaction_added
- reaction_removed
- team_domain_change
- user_change
- user_profile_changed
- user_status_changed
org_deploy_enabled: false
socket_mode_enabled: true
token_rotation_enabled: false
```
2. Click **"Create"**
3. Review and click **"Confirm"**
### 1.3 Enable Socket Mode
1. In app settings, navigate to **"Socket Mode"**
2. Toggle **"Enable Socket Mode"** to **ON**
3. Click **"Generate an app-level token"**
- Token name: `socket-mode-connection`
- Add scope: `connections:write`
- Click **"Generate"**
4. **Copy the token** (starts with `xapp-`)
- ⚠️ **Important**: Save this token securely, you'll need it for authentication
- Format: `xapp-1-A0123456789-1234567890123-abc...xyz`
### 1.4 Install App to Workspace
1. Navigate to **"Install App"**
2. Click **"Install to Workspace"**
3. Review permissions (29 bot scopes)
4. Click **"Allow"**
5. **Copy the "Bot User OAuth Token"** (starts with `xoxb-`)
- ⚠️ **Important**: Save this token securely
- Format: `xoxb-1234567890-1234567890123-AbC...WxY`
### 1.5 Verify Tokens
Create a temporary file to store tokens (delete after use):
```bash
# On local workstation (NOT on VPS)
cat > /tmp/slack-tokens.txt <<EOF
Bot Token (xoxb-): xoxb-YOUR-TOKEN-HERE
App Token (xapp-): xapp-YOUR-TOKEN-HERE
EOF
chmod 600 /tmp/slack-tokens.txt
```
**Token Security**:
- These tokens grant full access to your Slack workspace
- Never commit to git
- Never share publicly
- Store in password manager for long-term
- Tokens will be stored in bridge database after authentication
---
## Phase 2: NixOS Configuration
### 2.1 Update Bridge Configuration
Edit `hosts/ops-jrz1.nix`:
```nix
# Enable mautrix-slack bridge
services.mautrix-slack = {
enable = true;
matrix = {
homeserverUrl = "http://127.0.0.1:8008";
serverName = "clarun.xyz";
};
database = {
type = "postgres";
uri = "postgresql:///mautrix_slack?host=/run/postgresql";
};
appservice = {
port = 29319;
};
bridge = {
permissions = {
"clarun.xyz" = "user";
};
};
# Use debug logging for initial deployment
logging = {
level = "debug"; # Change to "info" after successful deployment
};
};
```
**Changes from current config**:
- Removed workspace-specific settings (no longer needed with interactive login)
- Added debug logging
- Simplified configuration
### 2.2 Verify olm-3.2.16 Allowed
Check if production.nix has:
```nix
nixpkgs.config.permittedInsecurePackages = [ "olm-3.2.16" ];
```
**Status**: ✅ Already present in production.nix (commit 0cbbb19)
### 2.3 Deploy Configuration
```bash
# On local workstation
cd /home/dan/proj/ops-jrz1
# Check git status
git status
# Review changes
git diff hosts/ops-jrz1.nix
# Commit changes
git add hosts/ops-jrz1.nix
git commit -m "Enable mautrix-slack bridge for chochacho workspace"
# Deploy to VPS
nixos-rebuild switch --flake .#ops-jrz1 \
--target-host root@45.77.205.49 \
--build-host localhost
# Expected output:
# - Building configuration...
# - Activating configuration...
# - Starting mautrix-slack.service...
```
**Deployment time**: ~2-5 minutes
---
## Phase 3: Service Verification
### 3.1 Check Service Status
```bash
# SSH to VPS
ssh root@45.77.205.49
# Check service running
systemctl status mautrix-slack
# Expected output:
# ● mautrix-slack.service - mautrix-slack
# Loaded: loaded
# Active: active (running)
# Main PID: [number]
# View recent logs
journalctl -u mautrix-slack -n 50
# Expected log entries:
# INFO [Main] mautrix-slack starting
# INFO [Database] Connected to PostgreSQL
# INFO [AppService] Listening on http://127.0.0.1:29319
# INFO [Bridge] Waiting for authentication
```
**If service fails to start**:
- Check logs: `journalctl -u mautrix-slack -n 100 --no-pager`
- Look for common errors:
- Database connection failed → Check PostgreSQL running
- Port already in use → Check nothing else on 29319
- olm error → Verify permittedInsecurePackages set
- Exit code 11 → Likely missing credentials (expected at this stage)
### 3.2 Verify Registration File
```bash
# Check registration file exists
ls -l /var/lib/matrix-appservices/mautrix_slack_registration.yaml
# View contents
cat /var/lib/matrix-appservices/mautrix_slack_registration.yaml
# Expected structure:
# id: slack
# url: http://127.0.0.1:29319
# as_token: [auto-generated]
# hs_token: [auto-generated]
# sender_localpart: slackbot
# namespaces:
# users:
# - regex: "^@slackbot:clarun.xyz$"
# exclusive: true
# - regex: "^@slack_.*:clarun.xyz$"
# exclusive: true
```
### 3.3 Register Appservice with Homeserver
**For conduwuit** (current homeserver):
```bash
# Stop homeserver
systemctl stop matrix-continuwuity
# Add registration to configuration
# Edit: /var/lib/matrix-continuwuity/continuwuity.toml
cat >> /var/lib/matrix-continuwuity/continuwuity.toml <<EOF
[[appservices]]
registration = "/var/lib/matrix-appservices/mautrix_slack_registration.yaml"
EOF
# Restart homeserver
systemctl start matrix-continuwuity
# Verify homeserver loaded appservice
journalctl -u matrix-continuwuity -n 20 | grep -i slack
# Expected: "Loaded appservice: slack"
```
**Alternative**: Update via NixOS configuration if conduwuit module supports appservice registration.
---
## Phase 4: Bridge Authentication
### 4.1 Create Matrix DM with Bridge Bot
1. Open Matrix client (Element Web, Element Desktop, etc.)
2. Log in as admin user
3. Start new Direct Message
4. Enter: `@slackbot:clarun.xyz`
5. Send message: `Hello`
**Expected Response**:
```
Welcome to the Slack bridge.
Use `help` to see available commands.
You are not logged in. Use `login app` to authenticate.
```
**If no response**:
- Check bot user exists: Try to view profile of `@slackbot:clarun.xyz`
- Check appservice registration loaded by homeserver
- Check bridge logs: `journalctl -u mautrix-slack -f`
- Verify homeserver can reach appservice: `curl http://127.0.0.1:29319/_matrix/app/v1/transactions`
### 4.2 Authenticate with Slack
In the DM with `@slackbot:clarun.xyz`:
1. Send command: `login app`
2. Bot prompts: `Please provide bot token (xoxb-...)`
- **Paste your bot token** from Phase 1.5
- Format: `xoxb-1234567890-1234567890123-AbCdEfGhIjKlMnOpQrStUvWxYz`
3. Bot prompts: `Please provide app token (xapp-...)`
- **Paste your app token** from Phase 1.5
- Format: `xapp-1-A0123456789-1234567890123-abc123def456...xyz`
4. **Expected Success Message**:
```
Successfully logged in to Slack workspace: chochacho
Syncing recent conversations (conversation_count: 10)
Creating portals for active channels...
Done. You should receive invitations to bridged rooms shortly.
```
**Authentication logs** (on VPS):
```bash
# Watch logs during authentication
journalctl -u mautrix-slack -f
# Expected log entries:
# INFO [Auth] Received login command
# INFO [Auth] Validating bot token
# INFO [Slack] Connecting to workspace: chochacho
# INFO [Socket] Calling apps.connections.open
# INFO [Socket] WebSocket URL received: wss://wss.slack.com/link/...
# INFO [Socket] Connecting to WebSocket
# INFO [Socket] Connected successfully
# INFO [Socket] Received hello message
# INFO [Portal] Syncing 10 recent conversations
# INFO [Portal] Creating portal for channel: #general (C0123ABC)
# INFO [Portal] Creating portal for channel: #dev-platform (C0456DEF)
```
### 4.3 Verify Socket Mode Connection
```bash
# Check logs for Socket Mode status
journalctl -u mautrix-slack -n 20 | grep -i "socket\|websocket\|connected"
# Expected:
# INFO [Socket] WebSocket connected
# INFO [Socket] Connection state: connected
```
**Health Indicators**:
- `connection_status`: connected
- `last_successful_message`: Updated within last minute
- `error_count`: 0
---
## Phase 5: Testing
### 5.1 Join Bridged Room
1. In Matrix client, check for room invitations
2. You should see invites for Slack channels:
- `#slack_general:clarun.xyz`
- `#slack_dev-platform:clarun.xyz`
- Others based on recent Slack activity
3. **Join** `#slack_dev-platform:clarun.xyz` (or your test channel)
**Expected room state**:
- Room name: "dev-platform (Slack)" or similar
- Room topic: Synced from Slack channel topic
- Members: Bridge bot + ghost users for Slack members
### 5.2 Test Slack → Matrix
1. In Slack app/web, go to **#dev-platform** channel
2. Post test message: `Hello from Slack! Testing bridge.`
3. **Wait** (should appear in Matrix within 5 seconds)
**Expected in Matrix**:
- Message appears in `#slack_dev-platform:clarun.xyz`
- Sender: `@slack_U123ABC:clarun.xyz` (ghost user)
- Display name: Your Slack display name
- Timestamp: Match Slack timestamp
- **Latency**: <5 seconds (FR-001 requirement)
**If message doesn't appear**:
- Check Slack WebSocket connection: `journalctl -u mautrix-slack -f`
- Look for event reception log: `INFO [Message] Relaying message from Slack`
- Verify Matrix homeserver reachable
- Check for errors in bridge logs
### 5.3 Test Matrix → Slack
1. In Matrix client, in `#slack_dev-platform:clarun.xyz`
2. Send test message: `Hello from Matrix! Bridge working.`
3. **Wait** (should appear in Slack within 5 seconds)
**Expected in Slack**:
- Message appears in **#dev-platform**
- Sender: Matrix Bridge bot (or your display name via customization)
- Content: "Your Matrix Name: Hello from Matrix! Bridge working."
- **Latency**: <5 seconds (FR-002 requirement)
**If message doesn't appear**:
- Check bot token valid: Look for Slack API errors
- Verify bot is member of channel
- Check for rate limiting errors
- Look for relay errors in logs
### 5.4 Test Additional Features
**Reactions** (FR-003):
1. In Slack, react to a message with 👍
2. Verify reaction appears in Matrix within 5 seconds
3. In Matrix, react to a message
4. Verify reaction appears in Slack
**File Attachments**:
1. In Slack, upload an image to #dev-platform
2. Verify image appears in Matrix (as Matrix content URI)
3. In Matrix, upload a file
4. Verify file appears in Slack
**Edits**:
1. In Slack, edit a message
2. Verify edit appears in Matrix
3. In Matrix, edit a message
4. Verify edit appears in Slack
**Threading** (if supported):
1. In Slack, reply in a thread
2. Verify thread structure in Matrix
### 5.5 Verify Health Indicators
```bash
# Check bridge health
journalctl -u mautrix-slack -n 50 | grep -E "connection|message|error"
# Health indicators (from SC-003a):
# - connection_status: connected
# - last_successful_message: [recent timestamp]
# - error_count: 0 (or very low)
# Check portal count
sudo -u mautrix_slack psql mautrix_slack -c "SELECT COUNT(*) FROM portal;"
# Expected: Number of synced channels (at least 1)
# Check ghost users
sudo -u mautrix_slack psql mautrix_slack -c "SELECT COUNT(*) FROM puppet;"
# Expected: Number of Slack users in bridged channels
```
---
## Phase 6: Production Readiness
### 6.1 Reduce Logging Level
After successful testing, reduce log verbosity:
Edit `hosts/ops-jrz1.nix`:
```nix
services.mautrix-slack = {
# ... existing config ...
logging = {
level = "info"; # Changed from "debug"
};
};
```
Redeploy:
```bash
nixos-rebuild switch --flake .#ops-jrz1 \
--target-host root@45.77.205.49 \
--build-host localhost
```
### 6.2 Document Deployment
Create worklog entry:
```bash
# On local workstation
cat > docs/worklogs/2025-10-22-slack-bridge-deployment.org <<EOF
* Slack Bridge Deployment - Generation [NUMBER]
** Date: 2025-10-22
** Objective: Deploy mautrix-slack bridge for chochacho workspace
** Steps Taken
1. Created Slack app with app manifest
2. Enabled Socket Mode, generated tokens
3. Updated NixOS configuration
4. Deployed to VPS
5. Authenticated bridge via Matrix chat
6. Tested bidirectional messaging
** Results
- ✅ Service running without errors
- ✅ Socket Mode connection established
- ✅ Messages relay Slack → Matrix within [X] seconds
- ✅ Messages relay Matrix → Slack within [X] seconds
- ✅ Reactions, files, edits working
** Configuration
- Workspace: chochacho
- Bridge port: 29319
- Database: PostgreSQL (mautrix_slack)
- Logging: info level
- Portals created: [NUMBER]
** Known Issues
- None
** Next Steps
- Monitor stability over 7 days
- Add additional channels based on team usage
- Consider enabling encryption for sensitive channels
EOF
git add docs/worklogs/2025-10-22-slack-bridge-deployment.org
git commit -m "Document Slack bridge deployment"
```
### 6.3 Backup Configuration
```bash
# Backup bridge database (optional but recommended)
ssh root@45.77.205.49 'sudo -u postgres pg_dump mautrix_slack' > /tmp/mautrix_slack_backup.sql
# Backup contains:
# - Portal mappings
# - Ghost user profiles
# - Message event mappings
# - Authentication credentials (encrypted in DB)
```
### 6.4 Set Up Monitoring
Add to monitoring system (if available):
```bash
# Service uptime check
systemctl is-active mautrix-slack
# Connection health (look for "connected" in recent logs)
journalctl -u mautrix-slack --since "5 minutes ago" | grep -i "connected"
# Error rate (should be 0 or very low)
journalctl -u mautrix-slack --since "1 hour ago" | grep -c ERROR
```
**Alerting thresholds**:
- Service down for >5 minutes → Page admin
- No messages relayed in >1 hour → Warning
- Error count >10 in 10 minutes → Warning
---
## Phase 7: Gradual Rollout
### 7.1 Week 1-2: Single Channel Validation
**Current state**: Bridge working with 1 test channel
**Actions**:
- Monitor logs daily: `journalctl -u mautrix-slack --since today`
- Test all features: messages, reactions, files, edits
- Document any issues or unexpected behavior
- Gather feedback from test users (2-3 people)
**Success criteria**:
- Zero service crashes
- All messages delivered within 5 seconds
- No user-reported issues
### 7.2 Week 3-4: Multi-Channel Expansion
**After Week 1-2 validation succeeds**:
1. **Invite Slack bot to additional channels**:
```
# In Slack workspace
/invite @Matrix Bridge to #general
/invite @Matrix Bridge to #random
```
2. **Portals auto-create** when bot joins or messages arrive
3. **Invite Matrix users** to new bridged rooms
4. **Monitor performance**:
- Database size: `sudo -u postgres psql mautrix_slack -c '\dt+'`
- Memory usage: `systemctl status mautrix-slack | grep Memory`
- Message count: `SELECT COUNT(*) FROM message;`
**Success criteria**:
- Handle 1000 messages/day per channel (SC-002 requirement)
- 99% uptime over 7 days (SC-004 requirement)
### 7.3 Week 5+: Full Team Adoption
**After multi-channel testing succeeds**:
1. **Announce to team**: Bridge is production-ready
2. **Provide user guide**: How to authenticate, join rooms
3. **Let adoption grow organically**: Portals created on-demand
4. **Monitor health metrics**: Weekly review of logs and performance
**Ongoing maintenance**:
- Weekly log review for errors
- Monthly token rotation (optional, recommended every 90 days)
- Periodic bridge version updates (via nixpkgs-unstable)
---
## Troubleshooting
### Service Won't Start
**Symptom**: `systemctl status mautrix-slack` shows failed
**Checks**:
1. Review logs: `journalctl -u mautrix-slack -n 100`
2. Check database connection: `sudo -u mautrix_slack psql mautrix_slack -c '\conninfo'`
3. Check port availability: `ss -tuln | grep 29319`
4. Verify olm package allowed: `grep permittedInsecurePackages production.nix`
**Common fixes**:
- Database not created → Check dev-services.nix, redeploy
- Port in use → Change appservice.port in config
- Permission error → Check file ownership in /var/lib/mautrix_slack
### Socket Mode Disconnects Frequently
**Symptom**: Logs show repeated disconnects/reconnects
**Checks**:
1. Check rate limiting: Look for "rate limited" in logs
2. Verify token validity: Test tokens in Slack API tester
3. Check network stability: `ping -c 100 wss.slack.com`
**Common causes**:
- Rate limit hit (1 connection/minute) → Automatic recovery, just wait
- Token revoked → Re-authenticate with new tokens
- Network issues → Check VPS network status
### Messages Not Relaying
**Symptom**: Messages sent but don't appear in destination
**Slack → Matrix troubleshooting**:
1. Check Socket Mode connected: `journalctl -u mautrix-slack | grep -i websocket`
2. Look for event reception: `grep "message.channels" logs`
3. Verify portal exists: `psql -c "SELECT * FROM portal WHERE name='dev-platform';"`
4. Check homeserver reachable: `curl http://localhost:8008/_matrix/client/versions`
**Matrix → Slack troubleshooting**:
1. Check bot token valid: Look for auth errors
2. Verify bot in channel: Check Slack channel members
3. Look for rate limit errors: `grep "rate_limit" logs`
4. Test Slack API manually: `curl -H "Authorization: Bearer xoxb-..." https://slack.com/api/chat.postMessage ...`
### Exit Code 11 (SIGSEGV)
**Symptom**: Service crashes with exit code 11
**Likely causes** (from research.md):
1. Missing credentials (most common at initial deployment)
2. Incomplete configuration
3. Security hardening conflicts
**Fixes**:
1. Enable debug logging
2. Temporarily disable systemd hardening:
```nix
# In mautrix-slack.nix service config
# Comment out: NoNewPrivileges, ProtectSystem, etc.
```
3. Check for nil pointer dereference in logs
4. Verify all required config fields present
---
## Reference Information
### Useful Commands
```bash
# Service management
systemctl status mautrix-slack
systemctl restart mautrix-slack
systemctl stop mautrix-slack
# View logs
journalctl -u mautrix-slack -f # Follow logs
journalctl -u mautrix-slack -n 100 # Last 100 lines
journalctl -u mautrix-slack --since "1 hour ago" # Last hour
journalctl -u mautrix-slack --since today # Today's logs
# Database queries
sudo -u mautrix_slack psql mautrix_slack -c "SELECT * FROM portal;"
sudo -u mautrix_slack psql mautrix_slack -c "SELECT * FROM puppet LIMIT 10;"
sudo -u mautrix_slack psql mautrix_slack -c "SELECT COUNT(*) FROM message;"
# Configuration files
/var/lib/mautrix_slack/config/config.yaml # Generated config
/var/lib/matrix-appservices/mautrix_slack_registration.yaml # Appservice registration
/nix/store/.../modules/mautrix-slack.nix # NixOS module
# Check service resources
systemctl status mautrix-slack | grep -E "Memory|CPU"
ps aux | grep mautrix-slack
```
### Key Endpoints
| Service | Endpoint | Purpose |
|---------|----------|---------|
| Bridge | http://127.0.0.1:29319 | Appservice HTTP server |
| Homeserver | http://127.0.0.1:8008 | Matrix client-server API |
| Database | /run/postgresql | PostgreSQL Unix socket |
| Slack WebSocket | wss://wss.slack.com/link/ | Socket Mode connection |
### Important File Locations
| Path | Contents | Owner |
|------|----------|-------|
| /var/lib/mautrix_slack/config/ | Generated config.yaml | mautrix_slack |
| /var/lib/mautrix_slack/mautrix_slack.db | SQLite DB (if not using PostgreSQL) | mautrix_slack |
| /var/lib/matrix-appservices/ | Appservice registration files | matrix-appservices |
| /run/secrets/ | Decrypted sops-nix secrets | root/service user |
### Success Criteria Checklist
From spec.md:
- [ ] **SC-001**: Bridge relays messages bidirectionally
- [ ] **SC-002**: Handle 1000 messages/day per channel
- [ ] **SC-003**: Reactions sync correctly in both directions
- [ ] **SC-003a**: Health indicators logged (connection status, last message timestamp, error count)
- [ ] **SC-004**: 99% uptime over 7-day observation period
- [ ] **SC-005**: File attachments <10MB sync successfully
- [ ] **SC-006**: Documentation exists (this quickstart!)
---
## Next Steps
After successful deployment:
1. **Run `/speckit.tasks`** to generate detailed implementation task breakdown
2. **Begin monitoring** for 7-day stability period
3. **Gather user feedback** from test users
4. **Plan expansion** to additional channels based on team usage
5. **Document lessons learned** in worklog
---
## Support Resources
- **mautrix-slack docs**: https://docs.mau.fi/bridges/go/slack/
- **Matrix room**: #slack:maunium.net
- **Slack API**: https://api.slack.com/
- **Project spec**: /home/dan/proj/ops-jrz1/specs/002-slack-bridge-integration/spec.md
- **Implementation plan**: /home/dan/proj/ops-jrz1/specs/002-slack-bridge-integration/plan.md
---
**Document Version**: 1.0
**Last Updated**: 2025-10-22
**Tested On**: NixOS 24.05, mautrix-slack (nixpkgs-unstable)
**Status**: Ready for deployment

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# Phase 0: Research Technical Foundations
**Feature**: 002-slack-bridge-integration
**Research Date**: 2025-10-22
**Status**: Complete
## Executive Summary
This document consolidates research on five critical technical areas for implementing the Slack↔Matrix bridge using mautrix-slack with Socket Mode on NixOS.
**Key Decisions**:
- ✅ Use Socket Mode (WebSocket) - no public endpoint needed
- ✅ Use App Login (official OAuth) for production stability
- ✅ Require 29 bot scopes + 1 app-level scope (`connections:write`)
- ✅ Use sops-nix flat key structure for Slack credentials
- ✅ Use automatic portal creation (no manual channel mapping)
- ✅ Leverage existing NixOS module, add secrets integration
---
## 1. Slack Socket Mode
### What is Socket Mode?
Socket Mode is Slack's **WebSocket-based protocol** (RFC 6455) that enables real-time event delivery without requiring a public HTTP endpoint.
**Connection Architecture**:
1. Application calls `apps.connections.open` API with app-level token (xapp-)
2. Slack responds with unique WebSocket URL: `wss://wss.slack.com/link/?ticket=...`
3. Application receives events over WebSocket (Events API, interactivity)
4. Application sends responses via standard Web API (HTTPS)
**Key Characteristics**:
- No public endpoint required (ideal for behind-firewall deployments)
- WebSocket URLs rotate dynamically (not static)
- Up to 10 concurrent connections allowed
- Events may be distributed across connections
- Rate limit: **1 WebSocket URL fetch per minute** (critical for reconnection)
### Token Requirements
**Two tokens required**:
| Token Type | Format | Purpose | Scope Required |
|------------|--------|---------|----------------|
| App-Level Token | `xapp-...` | Establish WebSocket connection | `connections:write` |
| Bot Token | `xoxb-...` | Perform API operations | 29+ bot scopes |
**Authentication Flow**:
1. Open Matrix DM with bridge bot (`@slackbot:clarun.xyz`)
2. Send command: `login app`
3. Provide both tokens when prompted
4. Bridge stores credentials in database, establishes Socket Mode connection
### Limitations and Trade-offs
**Technical Constraints**:
- WebSocket connections refresh every few hours (automatic reconnection)
- Backend container recycling causes occasional disconnects
- Rate-limited reconnections (1 request/minute maximum)
- Long-lived stateful connections (challenging to scale horizontally)
**Production Considerations**:
- ❌ Cannot publish to Slack Marketplace (HTTP required)
- ⚠️ Slack recommends HTTP for highest reliability
- ✅ Socket Mode recommended for: development, local testing, behind-firewall environments
**Why Socket Mode for ops-jrz1**:
1. VPS is private infrastructure (no public webhook complexity)
2. Small team use case (2-5 engineers, moderate message volume)
3. Security model favors minimal external exposure
4. Trade-off of slightly lower reliability is acceptable for non-critical team comms
### References
- [Socket Mode overview](https://docs.slack.dev/apis/events-api/using-socket-mode)
- [HTTP vs Socket Mode comparison](https://docs.slack.dev/apis/events-api/comparing-http-socket-mode)
- [mautrix-slack authentication](https://docs.mau.fi/bridges/go/slack/authentication.html)
---
## 2. Slack API Scopes
### Required Bot Token Scopes (29 total)
From [mautrix-slack app manifest](https://github.com/mautrix/slack/blob/main/app-manifest.yaml):
**Message Operations**:
- `chat:write` - Send messages as bot
- `chat:write.public` - Send to public channels without membership
- `chat:write.customize` - Customize bot username/avatar (for ghosting)
**Channel Access** (public channels):
- `channels:read`, `channels:history` - List and view messages
- `channels:write.invites`, `channels:write.topic` - Manage channels
**Private Channels** (groups):
- `groups:read`, `groups:history`, `groups:write`
- `groups:write.invites`, `groups:write.topic`
**Direct Messages**:
- `im:read`, `im:history`, `im:write`, `im:write.topic`
- `mpim:read`, `mpim:history`, `mpim:write`, `mpim:write.topic` (group DMs)
**User & Workspace**:
- `users:read`, `users.profile:read`, `users:read.email`
- `team:read`
**Rich Content**:
- `files:read`, `files:write`
- `reactions:read`, `reactions:write`
- `pins:read`, `pins:write`
- `emoji:read`
### Required App-Level Token Scopes (1 total)
- `connections:write` - Establish Socket Mode WebSocket connections
### Event Subscriptions (46 events)
The bridge subscribes to events including:
- Workspace: `app_uninstalled`, `team_domain_change`
- Channels: `channel_archive`, `channel_created`, `channel_deleted`, `channel_rename`, etc.
- Messages: `message.channels`, `message.groups`, `message.im`, `message.mpim`
- Interactions: `reaction_added`, `reaction_removed`, `pin_added`, `file_shared`, etc.
### Security Best Practices
**Principle of Least Privilege**:
- Use all 29 scopes from mautrix-slack manifest (required for full functionality)
- Consider removing `conversations.connect:write` if not using Slack Connect
**Token Storage**:
- ✅ Production: Use sops-nix encrypted secrets
- ✅ Never commit tokens to version control
- ✅ Use 0440 permissions (service user only)
**Monitoring**:
- Enable IP allowlisting for token usage (Slack API feature)
- Monitor token usage via Slack app management dashboard
- Log all API calls for audit purposes
### References
- [Permission Scopes Reference](https://api.slack.com/scopes)
- [mautrix-slack app manifest](https://github.com/mautrix/slack/blob/main/app-manifest.yaml)
---
## 3. mautrix-slack Configuration
### Current Module Structure
**Location**: `/home/dan/proj/ops-jrz1/modules/mautrix-slack.nix`
**Configuration Generation** (two-stage):
1. **Root stage**: Creates directory structure (`/var/lib/mautrix_slack/config`)
2. **User stage**: Generates config from example template using `-e` flag, merges overrides
**Module Architecture**:
```nix
# Key configuration sections exposed:
matrix = {
homeserverUrl = "http://127.0.0.1:8008";
serverName = "clarun.xyz";
};
database = {
type = "postgres";
uri = "postgresql:///mautrix_slack?host=/run/postgresql";
maxOpenConnections = 32;
maxIdleConnections = 4;
};
appservice = {
hostname = "127.0.0.1";
port = 29319;
id = "slack";
senderLocalpart = "slackbot";
userPrefix = "slack_";
};
bridge = {
commandPrefix = "!slack";
permissions = { "clarun.xyz" = "user"; };
};
encryption = {
enable = true; # Allow E2EE
default = false; # Don't enable by default
};
logging.level = "info";
```
**Missing from Module Options**:
- Slack-specific configuration (workspace, tokens)
- Socket Mode settings (bot token, app token injection)
- Channel mapping configuration
**Current Issue**: Module configured for "delpadtech" workspace, exits with code 11.
### Socket Mode Configuration Requirements
Based on mautrix patterns, Socket Mode credentials are likely configured via:
**Option A: Interactive login** (current mautrix-slack approach)
- No config needed initially
- Bridge prompts for tokens via Matrix chat
- Stores in database after first login
**Option B: Declarative config** (would require module enhancement)
```yaml
slack:
bot_token: "${BOT_TOKEN}" # From environment or secrets
app_token: "${APP_TOKEN}" # From environment or secrets
```
**Decision**: Use **interactive login** approach (Option A) to avoid module modifications. Tokens provided via `login app` command in Matrix.
### Database Configuration
**Current Setup** (working correctly):
```nix
database = {
type = "postgres";
uri = "postgresql:///mautrix_slack?host=/run/postgresql";
};
```
**Provisioning** (from `modules/dev-services.nix`):
```nix
services.postgresql = {
ensureDatabases = [ "mautrix_slack" ];
ensureUsers = [{
name = "mautrix_slack";
ensureDBOwnership = true;
}];
};
```
✅ No database configuration issues detected.
### Matrix Homeserver Integration
**Appservice Registration**:
- Generated at: `/var/lib/matrix-appservices/mautrix_slack_registration.yaml`
- Contains: `id`, `url`, `as_token`, `hs_token`, `namespaces`
**Missing Step**: Registration file must be loaded into conduwuit homeserver.
**Required Action**: Add to Matrix server configuration:
```toml
[[appservices]]
registration = "/var/lib/matrix-appservices/mautrix_slack_registration.yaml"
```
### Exit Code 11 Root Cause Analysis
**Exit Code 11 = SIGSEGV** (Segmentation Fault)
**Most likely causes** (ranked by probability):
1. **Missing Slack credentials** (95% likely)
- Module generates config without tokens
- Bridge crashes trying to connect with invalid/missing credentials
2. **Incomplete configuration** (80% likely)
- Example config has required fields not set
- Bridge code doesn't validate, crashes on access
3. **olm-3.2.16 library issues** (40% likely)
- Insecure package error requires `permittedInsecurePackages` allowance
- Already addressed in production config (commit 0cbbb19)
4. **SystemD security restrictions** (20% likely)
- Security hardening can cause segfaults with Go binaries
- May need temporary relaxation (as done for mautrix-gmessages)
**Validation Steps**:
1. Enable debug logging: `logging.level = "debug"`
2. Check logs: `journalctl -u mautrix-slack -n 100`
3. Temporarily disable security hardening
4. Verify database connectivity
5. Test with minimal config (no credentials - should fail gracefully)
### References
- [mautrix-slack GitHub](https://github.com/mautrix/slack)
- [mautrix docs](https://docs.mau.fi/bridges/go/slack/)
- Project file: `/home/dan/proj/ops-jrz1/modules/mautrix-slack.nix`
---
## 4. sops-nix Secrets Management
### Current Secrets Infrastructure
**Encryption**: Age encryption via SSH host key conversion
**File**: `/home/dan/proj/ops-jrz1/secrets/secrets.yaml`
```yaml
matrix-registration-token: "..."
acme-email: "dlei@duck.com"
slack-oauth-token: "" # Placeholder (empty)
slack-app-token: "" # Placeholder (empty)
```
**Age Configuration** (`.sops.yaml`):
```yaml
keys:
- &vultr_vps age1vuxcwvdvzl2u7w6kudqvnnf45czrnhwv9aevjq9hyjjpa409jvkqhkz32q
- &admin age18ue40q4fw8uggdlfag7jf5nrawvfvsnv93nurschhuynus200yjsd775v3
creation_rules:
- path_regex: secrets/secrets\.yaml$
key_groups:
- age:
- *vultr_vps # VPS can decrypt via /etc/ssh/ssh_host_ed25519_key
- *admin # Admin workstation can decrypt/edit
```
**Status**: ✅ Working correctly in production (Generation 31, deployed 2025-10-22)
### Secret Lifecycle
```
System Boot
↓
sops-nix activation script runs
↓
Reads /etc/ssh/ssh_host_ed25519_key
↓
Converts to age key (age1vux...)
↓
Decrypts secrets/secrets.yaml
↓
Extracts individual keys
↓
Writes to /run/secrets/<key-name>
↓
Sets ownership and permissions
↓
Services start (can now read secrets)
```
### Pattern for Slack Tokens
**Step 1: Update secrets.yaml**
```yaml
slack-oauth-token: "xoxb-YOUR-ACTUAL-TOKEN"
slack-app-token: "xapp-YOUR-ACTUAL-TOKEN"
```
Encrypt with: `sops secrets/secrets.yaml`
**Step 2: Declare in hosts/ops-jrz1.nix**
```nix
sops.secrets.slack-oauth-token = {
owner = "mautrix_slack";
group = "mautrix_slack";
mode = "0440";
};
sops.secrets.slack-app-token = {
owner = "mautrix_slack";
group = "mautrix_slack";
mode = "0440";
};
```
**Step 3: Reference in Service** (two patterns)
**Pattern A: LoadCredential** (systemd credentials)
```nix
systemd.services.mautrix-slack.serviceConfig = {
LoadCredential = [
"slack-oauth-token:/run/secrets/slack-oauth-token"
"slack-app-token:/run/secrets/slack-app-token"
];
};
# Service reads from: ${CREDENTIALS_DIRECTORY}/slack-oauth-token
```
**Pattern B: Direct file reference**
```nix
services.mautrix-slack = {
oauthTokenFile = "/run/secrets/slack-oauth-token";
appTokenFile = "/run/secrets/slack-app-token";
};
```
**Decision**: Use **interactive login approach** - tokens provided via Matrix chat, not config files. Secrets will be stored in bridge database, not referenced in NixOS config. This simplifies deployment and matches mautrix-slack's intended workflow.
### File Permissions Best Practices
```
-r--r----- (0440): Service-specific secrets (only service user + group can read)
-r--r--r-- (0444): Broadly readable secrets (e.g., email addresses)
-r-------- (0400): Root-only secrets (maximum security)
```
**Security guarantees**:
- ✅ Secrets never in Nix store (world-readable)
- ✅ Secrets only in `/run/secrets/` (tmpfs, RAM-only)
- ✅ Secrets cleared on reboot
- ✅ Encrypted at rest in git (safe to commit secrets.yaml)
### References
- [sops-nix GitHub](https://github.com/Mic92/sops-nix)
- [Michael Stapelberg's Blog](https://michael.stapelberg.ch/posts/2025-08-24-nixos-sops-nix/) (2025-08-24)
- Project file: `/home/dan/proj/ops-jrz1/secrets/secrets.yaml`
---
## 5. Channel Bridging Patterns
### How Channel Mapping Works
mautrix-slack uses **automatic portal creation** rather than manual channel mapping:
**Portal Creation Triggers**:
1. **Initial login**: Bridge creates portals for recent conversations (controlled by `conversation_count`)
2. **Receiving messages**: Portal auto-created when message arrives in new channel
3. **Bot membership**: Channels where Slack bot is invited are automatically bridged
**Portal Types Supported**:
- Public/private channels (including Slack Connect channels)
- Group DMs (multi-party direct messages)
- 1:1 Direct messages
**Shared Portals**: Multiple Matrix users can interact with the same Slack channel through a shared Matrix room.
### Configuration vs Runtime Management
**Configuration-based** (`conversation_count` in config.yaml):
- Controls how many recent conversations sync on initial login
- Only affects initial synchronization
- Separate settings for channels, group DMs, direct messages
**Runtime Management** (automatic):
- No manual channel mapping required
- Portal creation happens dynamically
- No explicit `open <channel-id>` command needed
- To interact with a new channel, simply send/receive a message in Slack
**Bot Commands** (via Matrix DM with `@slackbot:clarun.xyz`):
- `help` - Display available commands
- `login app` - Authenticate with Slack app credentials
- `login token <token> <cookie>` - Authenticate with user account (unofficial)
### Adding/Removing Channels
**Adding Channels**: ✅ **Runtime (no restart)**
- Receive a message in the channel → portal auto-created
- Invite Slack bot to channel (app login mode) → portal auto-created
**Removing Channels**: ⚠️ **Not explicitly documented**
- Likely has `delete-portal` command (based on other mautrix bridges)
- Would be sent from within the Matrix portal room
**Modifying Configuration**:
- Changes to `conversation_count` require bridge restart
- However, setting only affects initial sync, not ongoing operation
### Archived Channel Handling
⚠️ **Not explicitly documented**
Expected behavior:
- Matrix portal remains but becomes inactive
- No new messages flow (Slack channel is read-only)
- Historical messages remain accessible
**Recommendation**: Test this scenario in pilot deployment to document actual behavior.
### Gradual Rollout Strategy
**Phase 1: Single Test Channel** (Week 1-2)
- Set `conversation_count` low (5-10)
- Start with one channel: `#dev-platform` or `#test`
- Verify automatic portal creation, bidirectional messaging, reactions, files
**Phase 2: Small User Group** (Week 3-4)
- 3-5 team members authenticate
- Test shared portal functionality
- Monitor performance and reliability
**Phase 3: Organic Expansion** (Week 5+)
- Don't pre-configure channel lists
- Let automatic portal creation handle it based on usage
- Users get portals only for channels they actively use
**Configuration Strategy**:
```yaml
bridge:
conversation_count: 10 # Start small, expand organically
```
**Advantages**:
- No manual channel mapping to maintain
- Scales naturally with usage
- Easy to expand without configuration changes
- Users only see channels they interact with
### Key Limitations
⚠️ No traditional message backfill (history before bridge setup)
⚠️ Name changes not fully supported
⚠️ Being added to conversations only partially supported
⚠️ No documented manual `open <channel-id>` command
### References
- [mautrix-slack docs](https://docs.mau.fi/bridges/go/slack/)
- [ROADMAP.md](https://github.com/mautrix/slack/blob/main/ROADMAP.md)
- Support room: #slack:maunium.net
---
## 6. Implementation Decisions
### Critical Path Decisions
| Decision Point | Choice | Rationale |
|----------------|--------|-----------|
| **Connection Method** | Socket Mode (WebSocket) | No public endpoint needed, matches security model |
| **Authentication** | App Login (official OAuth) | Production stability, clear audit trail |
| **Token Management** | Interactive login via Matrix | Matches mautrix-slack workflow, simplifies config |
| **Secrets Storage** | sops-nix (existing pattern) | Already working in production (Gen 31) |
| **Channel Bridging** | Automatic portal creation | No manual mapping, scales with usage |
| **Initial Scope** | Single test channel | Validate before expanding |
| **Workspace** | chochacho (production) | Real workspace with admin rights |
### Risks and Mitigations
| Risk | Probability | Impact | Mitigation |
|------|-------------|--------|------------|
| Exit code 11 continues | High | High | Debug logging, relax systemd hardening, validate credentials |
| Socket Mode disconnects | Medium | Low | Automatic reconnection, monitor health indicators |
| Token expiration | Low | Medium | Clear error messages, documented re-authentication |
| Performance issues | Low | Medium | Start with 1 channel, monitor before expanding |
| Slack API rate limits | Low | Low | Respect rate limits, implement backoff |
### Open Questions for Implementation
1. **Exact cause of exit code 11**: Requires deployment with debug logging
2. **Matrix appservice registration**: Need to integrate with conduwuit config
3. **Actual `conversation_count` value**: Determine optimal setting for initial sync
4. **Archived channel behavior**: Document through testing
5. **Permission mapping**: Slack roles → Matrix power levels (verify in practice)
---
## 7. Next Steps
**Immediate** (Phase 1):
1. ✅ Create `data-model.md` (entities, relationships, state machines)
2. ✅ Create `contracts/bridge-config.yaml` (configuration schema)
3. ✅ Create `contracts/secrets-schema.yaml` (secrets structure)
4. ✅ Create `contracts/channel-mapping.yaml` (portal configuration)
5. ✅ Create `quickstart.md` (deployment runbook)
6. ✅ Update `.claude/CLAUDE.md` (agent context)
**Then** (Phase 2):
- Run `/speckit.tasks` to generate implementation task breakdown
- Begin actual implementation based on plan.md
---
## Document History
- **2025-10-22**: Initial research completed (5 research agents)
- **Phase 0 Status**: ✅ Complete
- **Next Phase**: Phase 1 (Design)

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# Feature Specification: Matrix-Slack Bridge Integration
**Feature Branch**: `002-slack-bridge-integration`
**Created**: 2025-10-22
**Status**: Draft
**Input**: User description: "Matrix-Slack bridge integration for bidirectional communication between Matrix homeserver and Slack workspace (chochacho), enabling unified team communication"
## Clarifications
### Session 2025-10-22
- Q: Initial Channel Bridge Configuration → A: Start with one test channel (e.g., #dev-platform or #test), expand after validation
- Q: Bridge Health Monitoring → A: Basic health indicators (connection status, last message timestamp, error count) logged to journal
## User Scenarios & Testing *(mandatory)*
### User Story 1 - Slack to Matrix Message Delivery (Priority: P1)
A team member sends a message in a Slack channel and it appears automatically in the corresponding Matrix room, allowing Matrix users to participate in the conversation seamlessly.
**Why this priority**: This is the core value proposition - establishing the communication bridge. Without this, the feature has no functionality. This validates that the bridge infrastructure is working correctly.
**Independent Test**: Can be fully tested by sending a test message in Slack and verifying it appears in Matrix, delivering immediate value as a read-only Slack viewer via Matrix.
**Acceptance Scenarios**:
1. **Given** bridge is configured for #general Slack channel, **When** user posts "Hello from Slack" in #general, **Then** message appears in bridged Matrix room within 5 seconds with original sender name
2. **Given** bridge is running and healthy, **When** user posts message with emoji reactions in Slack, **Then** message appears in Matrix with emoji preserved
3. **Given** bridge is configured, **When** user posts multi-line message in Slack, **Then** message formatting is preserved in Matrix (line breaks, lists)
4. **Given** bridge is operational, **When** user uploads file in Slack channel, **Then** file link appears in Matrix room
---
### User Story 2 - Matrix to Slack Message Delivery (Priority: P1)
A team member sends a message in Matrix room and it appears automatically in the corresponding Slack channel, enabling full bidirectional communication.
**Why this priority**: Completes the bidirectional flow, making this a true communication bridge rather than just a viewer. Essential for collaborative work.
**Independent Test**: Can be tested by sending a test message from Matrix and verifying it appears in Slack, proving full two-way communication works.
**Acceptance Scenarios**:
1. **Given** bridge is configured for bidirectional sync, **When** Matrix user posts "Hello from Matrix" in bridged room, **Then** message appears in Slack channel within 5 seconds with Matrix username
2. **Given** bridge supports rich formatting, **When** Matrix user posts message with markdown formatting, **Then** message appears in Slack with formatting converted appropriately
3. **Given** bridge handles mentions, **When** Matrix user mentions another user, **Then** mention is translated to Slack @username notation
4. **Given** bridge is operational, **When** Matrix user posts message with attachment, **Then** attachment link appears in Slack channel
---
### User Story 3 - Bridge Service Reliability (Priority: P2)
The bridge service starts automatically on server boot, recovers from connection failures, and continues operation without manual intervention.
**Why this priority**: Critical for production use but can be validated after basic messaging works. Prevents the bridge from being a maintenance burden.
**Independent Test**: Can be tested by rebooting the server and verifying bridge auto-starts and resumes messaging, or by simulating network failures.
**Acceptance Scenarios**:
1. **Given** server reboots, **When** system comes back online, **Then** bridge service starts automatically within 2 minutes and begins relaying messages
2. **Given** Slack API experiences temporary outage, **When** connectivity is restored, **Then** bridge reconnects automatically without message loss
3. **Given** Matrix homeserver restarts, **When** homeserver is available again, **Then** bridge re-establishes connection and resumes operation
4. **Given** bridge encounters configuration error, **When** error is logged, **Then** service reports clear diagnostic information for troubleshooting
---
### User Story 4 - Bridge Configuration Management (Priority: P3)
Platform administrators can configure which Slack channels are bridged to Matrix rooms through declarative configuration, without writing code or restarting services manually. Initial deployment starts with one test channel to validate the bridge mechanism before expanding to additional channels.
**Why this priority**: Important for managing the bridge long-term, but basic functionality can work with hardcoded configuration initially. Can be iterated after P1-P2 are working. Starting with a single test channel minimizes risk and provides clear validation before broader rollout.
**Independent Test**: Can be tested by adding a new channel to configuration and verifying it bridges correctly after configuration reload.
**Acceptance Scenarios**:
1. **Given** administrator wants to bridge new channel, **When** channel mapping is added to configuration file, **Then** new bridge is established after configuration update
2. **Given** channel is no longer needed, **When** channel mapping is removed from configuration, **Then** bridge stops relaying messages for that channel
3. **Given** multiple channels configured, **When** administrator views configuration, **Then** all active bridges are clearly listed with their mappings
4. **Given** configuration contains error, **When** configuration is applied, **Then** clear error message explains what needs to be fixed
---
### Edge Cases
- What happens when Slack workspace is temporarily unavailable? (Bridge should queue messages and deliver when available, or report unavailability to Matrix users)
- How does system handle rate limits from Slack API? (Bridge should throttle requests and queue messages to stay within limits)
- What happens when bridge tries to relay message too large for target platform? (Message should be truncated with indication, or split into multiple messages)
- How does bridge handle Slack threads? (Thread context should be preserved or indicated in Matrix, possibly with reply chain)
- What happens when user edits or deletes message in Slack? (Edited messages should sync to Matrix if supported, deletions should be reflected)
- How does bridge handle authentication token expiry? (Bridge should detect expiry and report error clearly, requiring reauthorization)
- What happens when two users have same display name? (Bridge should disambiguate with user IDs or workspace indicators)
## Requirements *(mandatory)*
### Functional Requirements
- **FR-001**: Bridge MUST relay messages from Slack to Matrix within 5 seconds of posting
- **FR-002**: Bridge MUST relay messages from Matrix to Slack within 5 seconds of posting
- **FR-003**: Bridge MUST preserve message sender identity (username/display name)
- **FR-004**: Bridge MUST operate using Socket Mode for reliable real-time messaging
- **FR-005**: Bridge MUST authenticate to Slack using bot token and app token
- **FR-006**: Bridge MUST register with Matrix homeserver as application service
- **FR-007**: Bridge MUST store credentials securely using sops-nix encrypted secrets
- **FR-008**: Bridge MUST use PostgreSQL database for storing bridge state and mappings
- **FR-009**: Bridge MUST connect to chochacho Slack workspace
- **FR-009a**: Initial deployment MUST bridge one designated test channel (e.g., #dev-platform or #test) for validation
- **FR-010**: Bridge MUST start automatically on system boot as systemd service
- **FR-011**: Bridge MUST log all operations to system journal for debugging
- **FR-011a**: Bridge MUST log health indicators including connection status, last successful message timestamp, and error counts
- **FR-012**: Bridge MUST map Slack users to Matrix ghost users (puppeting)
- **FR-013**: Bridge MUST handle connection failures gracefully with automatic retry
- **FR-014**: Bridge MUST respect Slack API rate limits to avoid service disruption
- **FR-015**: System MUST support reauthorization of Slack bot when scopes change
### Key Entities
- **Slack Channel**: Represents a conversation space in Slack workspace, identified by channel ID, contains messages and participants
- **Matrix Room**: Represents a conversation space in Matrix homeserver, identified by room ID, contains events and members
- **Channel Bridge Mapping**: Links a Slack channel to a Matrix room, defines bidirectional sync relationship
- **Ghost User**: Matrix user representation of Slack user, allows messages to appear from original sender in Matrix
- **Bridge State**: Persistent connection and sync status information, includes last message timestamps and error states
- **Credentials**: Slack bot token, app token, and Matrix app service tokens required for authentication
## Success Criteria *(mandatory)*
### Measurable Outcomes
- **SC-001**: Engineers can send message in Slack and see it appear in Matrix within 5 seconds
- **SC-002**: Engineers can send message in Matrix and see it appear in Slack within 5 seconds
- **SC-003**: Bridge maintains 99% uptime over 7-day period after deployment
- **SC-003a**: Bridge health status (connected/disconnected, last message time, error count) is visible in system logs
- **SC-004**: Bridge automatically recovers from network failures without manual intervention
- **SC-005**: Bridge setup and configuration is documented clearly enough for another engineer to replicate
- **SC-006**: Platform administrators can add new channel bridge in under 10 minutes
- **SC-007**: Zero message loss during normal operation (messages always delivered or error reported)
- **SC-008**: Bridge remains operational after server reboot without manual restart
## Assumptions
- Slack workspace (chochacho) administrators will grant necessary permissions for bot installation
- Existing Slack bot can be reauthorized with updated scopes and Socket Mode enabled
- Network connectivity between VPS and Slack API is reliable (>99% uptime)
- Matrix homeserver (clarun.xyz) is operational and accessible on localhost
- PostgreSQL database is available for bridge state storage
- Secrets management via sops-nix is already configured and working
- Engineers primarily communicate in Slack and will continue doing so
- Initial deployment bridges one test channel for validation before expanding
- Number of bridged channels will be small initially (< 10 channels after validation)
- Message volume is moderate (< 1000 messages/day per channel)
- No need for historical message import (bridge starts fresh from activation time)
## Scope
### In Scope
- Bidirectional message relay between Slack and Matrix
- Bot token authentication with Socket Mode
- Single Slack workspace (chochacho) integration
- Declarative channel bridge configuration via NixOS
- Automatic service startup and recovery
- Secure credential storage with sops-nix
- Basic message formatting preservation
- User identity preservation via ghost users
### Out of Scope
- Historical message import/migration
- WhatsApp bridge integration (future feature)
- Google Messages bridge integration (future feature)
- Multi-workspace Slack support
- Advanced Slack features (workflows, slash commands, custom integrations)
- Matrix E2E encryption for bridged rooms
- Message editing/deletion sync (nice-to-have, not MVP)
- Thread conversation preservation (nice-to-have, not MVP)
- Reaction sync between platforms (nice-to-have, not MVP)
- File upload sync (links only, not full upload mirroring)
- Voice/video call bridging
## Dependencies
### Technical Dependencies
- Matrix homeserver (conduwuit) operational on clarun.xyz:8008
- PostgreSQL 15.10 available for bridge database
- sops-nix secrets management configured with VPS age key
- NixOS module system for declarative service configuration
- mautrix-slack package available in nixpkgs-unstable
### External Dependencies
- Slack workspace (chochacho) administrator access
- Slack bot reauthorization with required scopes
- Socket Mode enabled for Slack app
- Slack API availability and rate limits
- Network connectivity to Slack API endpoints
### Process Dependencies
- Manager approval for Slack bot reauthorization
- Secrets (bot token, app token) obtained from Slack
- Matrix appservice registration completed
- Platform vision documentation (docs/platform-vision.md) approved
- Deployment pattern established (NixOS module approach)
## Notes
### Context from Platform Vision
This feature represents **Milestone 1** of the ops-jrz1 platform vision: "Working Slack Bridge". Success here validates the core communication architecture and unblocks team onboarding.
Reference: `docs/platform-vision.md` sections:
- Communication Layer principles
- Presentable MVP definition
- Phase 1 timeline
### Existing Infrastructure
- mautrix-slack NixOS module exists: `modules/mautrix-slack.nix`
- Module currently configured for "delpadtech" workspace (needs update to "chochacho")
- Service exits with code 11 (likely missing configuration or credentials)
- PostgreSQL database setup already configured in dev-services.nix
- Secrets management pattern established with Matrix registration token
### Known Issues
- Current exit code 11 suggests missing Slack credentials or configuration
- Workspace name needs update: delpadtech → chochacho
- Socket Mode not yet configured in Slack app
- Bot scopes may need adjustment for mautrix-slack requirements
### Security Considerations
- Bot token and app token MUST be stored in encrypted secrets.yaml
- Tokens MUST NOT appear in configuration files or logs
- Bridge service runs as dedicated user (mautrix_slack) with limited permissions
- Database access restricted to bridge user only
- No public endpoints exposed (bridge connects outbound to Slack API)
### Testing Strategy
- Manual testing sufficient for MVP (automated tests future enhancement)
- Initial deployment validates bridge with single test channel (#dev-platform or #test)
- Test each user story independently as implemented
- Use test messages in Slack and Matrix to verify relay
- Simulate failures (network disconnect, service restart) to test recovery
- Monitor logs for errors and performance issues using basic health indicators (connection status, message timestamps, error counts)
- Validate secrets are never logged or exposed
- Verify health indicators appear in system journal during normal operation and failure scenarios
### Future Enhancements
These are explicitly out of scope for MVP but worth documenting for iteration:
- Message editing/deletion sync
- Thread preservation
- Emoji reaction sync
- Advanced Slack integrations (slash commands, workflows)
- Multi-workspace support
- Historical message import
- Advanced metrics dashboard (Prometheus, Grafana integration)
- Automated health checks and alerting beyond basic logging
- Message throughput and latency histograms

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# Tasks: Matrix-Slack Bridge Integration
**Input**: Design documents from `/specs/002-slack-bridge-integration/`
**Prerequisites**: plan.md, spec.md, research.md, data-model.md, contracts/, quickstart.md
**Tests**: Manual integration testing only (no automated test tasks per spec.md testing strategy)
**Organization**: Tasks are grouped by user story to enable independent implementation and testing of each story.
## Format: `[ID] [P?] [Story] Description`
- **[P]**: Can run in parallel (different files, no dependencies)
- **[Story]**: Which user story this task belongs to (e.g., US1, US2, US3, US4)
- Include exact file paths in descriptions
## Path Conventions
- Infrastructure configuration project (NixOS modules)
- Primary files: `modules/mautrix-slack.nix`, `hosts/ops-jrz1.nix`, `secrets/secrets.yaml`
- Documentation: `docs/worklogs/*.org`
---
## Phase 1: Setup (Shared Infrastructure)
**Purpose**: Slack app configuration and secrets preparation (external prerequisites)
- [ ] T001 Create Slack app using mautrix-slack app manifest from https://github.com/mautrix/slack/blob/main/app-manifest.yaml
- [ ] T002 Enable Socket Mode in Slack app settings and generate app-level token (xapp-) with connections:write scope
- [ ] T003 Install Slack app to chochacho workspace and copy bot token (xoxb-)
- [ ] T004 [P] Document app setup process in docs/worklogs/2025-10-22-slack-app-setup.org
- [ ] T005 Verify Slack app has all 29 required bot scopes per research.md section 2
---
## Phase 2: Foundational (Blocking Prerequisites)
**Purpose**: Core infrastructure that MUST be complete before ANY user story can be implemented
**⚠️ CRITICAL**: No user story work can begin until this phase is complete
- [ ] T006 Add slack-oauth-token and slack-app-token to secrets/secrets.yaml using sops secrets/secrets.yaml
- [ ] T007 Verify secrets decrypt correctly on VPS using ssh root@45.77.205.49 'sops -d /path/to/secrets.yaml'
- [X] T008 Update modules/mautrix-slack.nix to change workspace from "delpadtech" to "chochacho"
- [X] T009 Verify PostgreSQL database mautrix_slack exists using ssh root@45.77.205.49 'sudo -u postgres psql -l | grep mautrix_slack'
- [X] T010 Verify Matrix homeserver conduwuit is running on port 8008 using ssh root@45.77.205.49 'curl -s http://localhost:8008/_matrix/client/versions'
**Checkpoint**: Foundation ready - user story implementation can now begin in parallel
---
## Phase 3: User Story 1 - Slack to Matrix Message Delivery (Priority: P1) 🎯 MVP
**Goal**: Relay messages from Slack to Matrix within 5 seconds with sender identity preserved
**Independent Test**: Send test message in Slack #dev-platform, verify appears in Matrix room within 5 seconds with correct sender
### Implementation for User Story 1
- [ ] T011 [US1] Update hosts/ops-jrz1.nix to enable services.mautrix-slack with homeserverUrl http://127.0.0.1:8008 and serverName clarun.xyz
- [ ] T012 [US1] Configure database connection in hosts/ops-jrz1.nix with uri postgresql:///mautrix_slack?host=/run/postgresql
- [ ] T013 [US1] Set logging.level to "debug" in hosts/ops-jrz1.nix for initial deployment troubleshooting
- [ ] T014 [US1] Deploy configuration to VPS using nixos-rebuild switch --flake .#ops-jrz1 --target-host root@45.77.205.49 --build-host localhost
- [ ] T015 [US1] Verify mautrix-slack service started using ssh root@45.77.205.49 'systemctl status mautrix-slack'
- [ ] T016 [US1] Check service logs for startup errors using ssh root@45.77.205.49 'journalctl -u mautrix-slack -n 50'
- [ ] T017 [US1] Verify appservice registration file created at /var/lib/matrix-appservices/mautrix_slack_registration.yaml
- [ ] T018 [US1] Add appservice registration to Matrix homeserver configuration (conduwuit continuwuity.toml)
- [ ] T019 [US1] Restart Matrix homeserver to load appservice using ssh root@45.77.205.49 'systemctl restart matrix-continuwuity'
- [ ] T020 [US1] Open Matrix DM with @slackbot:clarun.xyz and verify bot responds
- [ ] T021 [US1] Authenticate bridge by sending "login app" command and providing bot token and app token
- [ ] T022 [US1] Verify Socket Mode connection established in logs using ssh root@45.77.205.49 'journalctl -u mautrix-slack -f | grep -i socket'
- [ ] T023 [US1] Accept invitation to Matrix room for #dev-platform channel
- [ ] T024 [US1] Test Slack→Matrix relay by posting "Test message from Slack" in #dev-platform and verifying it appears in Matrix within 5 seconds
- [ ] T025 [US1] Verify sender identity preserved (message shows from ghost user @slack_USERID:clarun.xyz)
- [ ] T026 [US1] Test emoji preservation by posting message with emoji in Slack and verifying emoji appears in Matrix
- [ ] T027 [US1] Test multi-line message formatting by posting multi-line message in Slack and verifying line breaks preserved in Matrix
- [ ] T028 [US1] Test file attachment by uploading file to Slack and verifying link appears in Matrix
- [ ] T029 [US1] Document US1 validation results in docs/worklogs/2025-10-22-us1-slack-to-matrix-validation.org
**Checkpoint**: At this point, User Story 1 should be fully functional and testable independently
---
## Phase 4: User Story 2 - Matrix to Slack Message Delivery (Priority: P1)
**Goal**: Relay messages from Matrix to Slack within 5 seconds with Matrix username preserved
**Independent Test**: Send test message from Matrix room, verify appears in Slack channel within 5 seconds with Matrix username
### Implementation for User Story 2
- [ ] T030 [US2] Test Matrix→Slack relay by posting "Test message from Matrix" in bridged Matrix room and verifying it appears in Slack within 5 seconds
- [ ] T031 [US2] Verify Matrix username appears in Slack message (bridge bot posts with sender attribution)
- [ ] T032 [US2] Test markdown formatting by posting message with **bold** and *italic* in Matrix and verifying formatting converted in Slack
- [ ] T033 [US2] Test user mention by mentioning another Matrix user and verifying translated to Slack @username format
- [ ] T034 [US2] Test attachment posting from Matrix and verify link appears in Slack
- [ ] T035 [US2] Verify bidirectional message flow works simultaneously (send messages from both sides)
- [ ] T036 [US2] Document US2 validation results in docs/worklogs/2025-10-22-us2-matrix-to-slack-validation.org
**Checkpoint**: At this point, User Stories 1 AND 2 should both work independently (full bidirectional communication)
---
## Phase 5: User Story 3 - Bridge Service Reliability (Priority: P2)
**Goal**: Bridge starts automatically on boot and recovers from failures without manual intervention
**Independent Test**: Reboot server and verify bridge auto-starts within 2 minutes, or simulate network failure and verify auto-recovery
### Implementation for User Story 3
- [ ] T037 [US3] Verify systemd service has Restart=always in modules/mautrix-slack.nix serviceConfig
- [ ] T038 [US3] Verify service has After=network-online.target postgresql.service matrix-continuwuity.service in systemd dependencies
- [ ] T039 [US3] Test auto-start by rebooting VPS using ssh root@45.77.205.49 'reboot'
- [ ] T040 [US3] Verify bridge service started automatically within 2 minutes using systemctl status mautrix-slack
- [ ] T041 [US3] Verify messages relay successfully after reboot without manual intervention
- [ ] T042 [US3] Test connection recovery by simulating Slack API outage (temporarily revoke token, then restore)
- [ ] T043 [US3] Verify bridge reconnects automatically after token restored without manual restart
- [ ] T044 [US3] Test Matrix homeserver recovery by restarting conduwuit using ssh root@45.77.205.49 'systemctl restart matrix-continuwuity'
- [ ] T045 [US3] Verify bridge re-establishes connection to Matrix automatically
- [ ] T046 [US3] Test configuration error handling by temporarily breaking config and verifying clear diagnostic message in logs
- [ ] T047 [US3] Verify health indicators logged (connection status, last message timestamp, error count) using journalctl -u mautrix-slack --since "1 hour ago"
- [ ] T048 [US3] Document US3 validation results including recovery times in docs/worklogs/2025-10-22-us3-reliability-validation.org
**Checkpoint**: All P1 and P2 user stories should now be independently functional
---
## Phase 6: User Story 4 - Bridge Configuration Management (Priority: P3)
**Goal**: Administrators can configure channel bridges declaratively without code or manual restarts
**Independent Test**: Add new channel to configuration, reload config, verify new bridge established automatically
### Implementation for User Story 4
- [ ] T049 [US4] Review automatic portal creation behavior from research.md section 5 (channels auto-bridge on activity)
- [ ] T050 [US4] Document conversation_count configuration parameter in hosts/ops-jrz1.nix (controls initial sync count)
- [ ] T051 [US4] Test adding new channel by inviting Slack bot to #general using /invite @Matrix Bridge in Slack
- [ ] T052 [US4] Verify portal auto-created when message sent in #general without configuration change
- [ ] T053 [US4] Accept Matrix room invitation for #general and verify messages relay
- [ ] T054 [US4] Test removing channel bridge by kicking bot from Slack channel and verifying portal becomes inactive
- [ ] T055 [US4] Document active bridges by querying database using ssh root@45.77.205.49 'sudo -u mautrix_slack psql mautrix_slack -c "SELECT * FROM portal;"'
- [ ] T056 [US4] Test configuration error handling by setting invalid conversation_count value and verifying error message
- [ ] T057 [US4] Document channel management workflow in docs/worklogs/2025-10-22-us4-channel-management.org
- [ ] T058 [US4] Update CLAUDE.md with channel management patterns and common commands
**Checkpoint**: All user stories should now be independently functional
---
## Phase 7: Polish & Cross-Cutting Concerns
**Purpose**: Production readiness and documentation
- [ ] T059 [P] Change logging.level from "debug" to "info" in hosts/ops-jrz1.nix for production
- [ ] T060 [P] Create comprehensive deployment worklog in docs/worklogs/2025-10-22-slack-bridge-deployment-complete.org
- [ ] T061 [P] Update platform-vision.md to mark Milestone 1 (Working Slack Bridge) as complete
- [ ] T062 Validate all success criteria from spec.md SC-001 through SC-008
- [ ] T063 Run through quickstart.md steps to verify deployment guide accuracy
- [ ] T064 [P] Create backup of bridge database using ssh root@45.77.205.49 'sudo -u postgres pg_dump mautrix_slack > mautrix_slack_backup.sql'
- [ ] T065 [P] Document monitoring commands and health check procedures in CLAUDE.md
- [ ] T066 Monitor bridge stability for 7 days and collect uptime metrics for SC-003 validation
- [ ] T067 [P] Create troubleshooting guide for common issues (exit code 11, Socket Mode disconnects, auth failures)
---
## Dependencies & Execution Order
### Phase Dependencies
- **Setup (Phase 1)**: No dependencies - can start immediately (external Slack app configuration)
- **Foundational (Phase 2)**: Depends on Setup completion - BLOCKS all user stories
- **User Stories (Phase 3-6)**: All depend on Foundational phase completion
- US1 and US2 are both P1 priority but US2 depends on US1 being tested first (builds on Slack→Matrix foundation)
- US3 (P2) can be tested after US1+US2 work
- US4 (P3) can be implemented after core messaging validated
- **Polish (Phase 7)**: Depends on all desired user stories being complete
### User Story Dependencies
- **User Story 1 (P1)**: Can start after Foundational (Phase 2) - No dependencies on other stories
- **User Story 2 (P1)**: Can start after US1 validated - Builds on Slack→Matrix relay working
- **User Story 3 (P2)**: Can start after US1+US2 - Tests existing bridge reliability
- **User Story 4 (P3)**: Can start after US1+US2 - Tests channel management on working bridge
### Within Each User Story
- US1: Setup → Deploy → Authenticate → Test Slack→Matrix → Validate
- US2: Test Matrix→Slack → Validate (uses infrastructure from US1)
- US3: Test auto-start → Test recovery → Monitor health indicators
- US4: Test auto portal creation → Test removal → Document management
### Parallel Opportunities
- Phase 1 (T001-T005): All can run in parallel (different Slack app configuration steps)
- Phase 2: Most tasks sequential (dependencies on secrets, config, services)
- User Stories: Cannot truly parallelize due to shared bridge instance and sequential validation needs
- Phase 7 polish tasks: Most marked [P] can run in parallel (different files/documentation)
---
## Parallel Example: Phase 1 (Slack App Setup)
```bash
# All Slack app configuration tasks can proceed in parallel:
Task: "Create Slack app using manifest"
Task: "Document app setup process"
Task: "Verify scopes"
```
---
## Parallel Example: Phase 7 (Polish)
```bash
# Documentation and monitoring tasks can run in parallel:
Task: "Change logging level to info"
Task: "Create deployment worklog"
Task: "Update platform-vision.md"
Task: "Create database backup"
Task: "Document monitoring commands"
Task: "Create troubleshooting guide"
```
---
## Implementation Strategy
### MVP First (User Stories 1 + 2)
1. Complete Phase 1: Slack App Setup (external)
2. Complete Phase 2: Foundational (CRITICAL - blocks all stories)
3. Complete Phase 3: User Story 1 (Slack→Matrix)
4. **VALIDATE US1**: Test independently, verify <5 second latency, verify sender identity
5. Complete Phase 4: User Story 2 (Matrix→Slack)
6. **VALIDATE US2**: Test independently, verify bidirectional flow works
7. **STOP and VALIDATE MVP**: Full bidirectional messaging working
8. Deploy/demo if ready
### Incremental Delivery
1. Complete Setup + Foundational → Foundation ready
2. Add User Story 1 → Test independently → MVP partial (read-only Slack via Matrix)
3. Add User Story 2 → Test independently → MVP complete (full bidirectional)
4. Add User Story 3 → Test independently → Production ready (auto-recovery)
5. Add User Story 4 → Test independently → Admin friendly (easy channel management)
6. Each story adds value without breaking previous stories
### Single-Person Sequential Strategy
Given infrastructure configuration nature (single bridge instance):
1. Complete Setup (Phase 1) - Slack app external setup
2. Complete Foundational (Phase 2) - Core infrastructure
3. Implement User Story 1 (Phase 3) - Validate thoroughly before proceeding
4. Implement User Story 2 (Phase 4) - Builds on US1, validate bidirectional
5. Implement User Story 3 (Phase 5) - Test reliability features
6. Implement User Story 4 (Phase 6) - Test channel management
7. Polish (Phase 7) - Production hardening and documentation
---
## Notes
- [P] tasks = different files, no dependencies
- [Story] label maps task to specific user story for traceability
- Each user story should be independently completable and testable
- Manual testing throughout (no automated test suite per spec.md)
- Commit after each task or logical group
- Stop at any checkpoint to validate story independently
- Infrastructure project: tasks are configuration updates, not traditional code
- Bridge uses interactive authentication (tokens via Matrix chat, not NixOS config)
- Automatic portal creation means no static channel mapping configuration needed
- Health monitoring via systemd journal logs (basic indicators per FR-011a)