.env.example

# Database
POSTGRES_DB=multica
POSTGRES_USER=multica
POSTGRES_PASSWORD=multica
POSTGRES_PORT=5432
DATABASE_URL=postgres://multica:multica@localhost:5432/multica?sslmode=disable
# Optional pgxpool tuning. Defaults are 25 / 5 per pod and are usually fine.
# You can also set pool_max_conns / pool_min_conns as query params on
# DATABASE_URL; env vars below take precedence over URL params.
# DATABASE_MAX_CONNS=25
# DATABASE_MIN_CONNS=5

# Server
# APP_ENV gates production safety checks. Docker self-host pins APP_ENV to
# "production" by default. Local dev can leave it unset.
# See SELF_HOSTING.md for the full login setup.
APP_ENV=
# Optional local/testing shortcut. Empty by default, so there is no fixed
# verification code. Without RESEND_API_KEY, generated codes print to stdout.
# If you need deterministic local automation, set a 6-digit value such as
# 888888 and keep APP_ENV non-production. This is ignored when APP_ENV=production.
MULTICA_DEV_VERIFICATION_CODE=
PORT=8080
# Docker Compose consumes flat port values. Set BACKEND_PORT directly to
# override the backend host port.
BACKEND_PORT=8080
# Optional aliases for local/self-host backend port helpers outside compose.
# API_PORT=8080
# SERVER_PORT=8080
FRONTEND_PORT=3000
# Derived by docker-compose.selfhost.yml / local scripts from FRONTEND_PORT.
# Set explicitly only when serving frontend on a different origin/domain.
FRONTEND_ORIGIN=http://localhost:${FRONTEND_PORT}
# Prometheus metrics are disabled by default. When enabled, bind to loopback
# unless you protect the listener with private networking, allowlists, or
# proxy auth. Do not expose this endpoint through the public app/API ingress.
# HTTP request metrics start accumulating only when this listener is enabled.
# METRICS_ADDR=127.0.0.1:9090
JWT_SECRET=change-me-in-production
# Derived by Makefile / local scripts from the backend port.
# Set explicitly only when the daemon reaches the API through a different URL.
# MULTICA_SERVER_URL=ws://localhost:8080/ws
# Derived by docker-compose.selfhost.yml / local scripts from FRONTEND_ORIGIN.
# Set explicitly only when the app's public URL differs from local frontend.
MULTICA_APP_URL=${FRONTEND_ORIGIN}
# Public URL the API is reachable at from the open internet (no trailing
# slash). Used to mint absolute webhook URLs for autopilot webhook
# triggers, the Gitea integration's repo webhooks, and to show correct
# daemon setup commands in the web UI. Leave
# unset behind a same-origin reverse proxy or for plain localhost dev —
# the frontend will compose the URL from window.origin + webhook_path in
# that case. Headers are intentionally not used to derive this value, to
# avoid Host / X-Forwarded-Host spoofing when a self-hosted reverse proxy
# is not hardened.
MULTICA_PUBLIC_URL=
# Comma-separated CIDR list of reverse proxies whose X-Forwarded-For /
# X-Real-IP headers the per-IP webhook rate limiter is allowed to trust.
# Empty (the default) means "trust no headers" — the limiter uses
# r.RemoteAddr only, which is the safe shape when the backend is
# exposed directly. Set this when running behind nginx/Caddy/Cloudflare:
# e.g. "127.0.0.1/32" for a same-host reverse proxy, or the CDN's
# announced ranges for cloud deployments.
MULTICA_TRUSTED_PROXIES=
# Basic LLM API layer (MUL-4238). Backs server-internal LLM helpers such as
# chat title generation (the generic OpenAI-compatible passthrough endpoints
# were removed in MUL-4309 — LLM access is internal-only). When both API key
# and base URL are empty the layer is disabled and callers fall back silently.
#   - API key for the upstream (OpenAI or any OpenAI-compatible gateway).
MULTICA_LLM_API_KEY=
#   - Base URL of the upstream. Leave unset to use OpenAI's default
#     (https://api.openai.com/v1). Set this to point at a gateway or a
#     self-hosted, OpenAI-compatible model server.
MULTICA_LLM_BASE_URL=
#   - Default model used when a request omits `model`. When unset, falls
#     back to a small built-in default (gpt-4o-mini).
MULTICA_LLM_DEFAULT_MODEL=
MULTICA_DAEMON_CONFIG=
MULTICA_WORKSPACE_ID=
MULTICA_DAEMON_ID=
MULTICA_DAEMON_DEVICE_NAME=
MULTICA_DAEMON_POLL_INTERVAL=3s
MULTICA_DAEMON_HEARTBEAT_INTERVAL=15s
MULTICA_CODEX_PATH=codex
MULTICA_CODEX_MODEL=
MULTICA_CODEX_WORKDIR=
MULTICA_CODEX_TIMEOUT=20m

# Feature flags
# Optional path to a YAML file declaring feature flag rules. When unset,
# every flag falls through to the caller's default, which lets the server
# boot before any flag config is authored. When set, the file is read once
# at startup and a parse / IO error fails fast — same loud-failure shape as
# DATABASE_URL or JWT_SECRET misconfig. See docs/feature-flags.md for the
# full schema; the minimum example is:
#
#   billing_new_invoice_email:
#     default: true
#   checkout_algo:
#     default: false
#     variant: experiment-v2
#     percent: { percent: 25, by: user_id }
#
# Individual flags can also be overridden without touching the YAML by
# setting FF_<FLAG_KEY> env vars (FF_BILLING_NEW_INVOICE_EMAIL=false, 25%,
# or any variant string). The env override beats the YAML, which is the
# Ops kill-switch path — flip a flag without redeploying by restarting the
# process with the env var set.
MULTICA_FEATURE_FLAGS_FILE=

# Self-host image channel
# Default stable release channel. Pin to an exact release like v0.2.4 if you
# want to stay on a specific version. If the selected tag has not been
# published to GHCR yet, use make selfhost-build / the build override instead.
MULTICA_IMAGE_TAG=latest
MULTICA_BACKEND_IMAGE=ghcr.io/multica-ai/multica-backend
MULTICA_WEB_IMAGE=ghcr.io/multica-ai/multica-web

# Email
# Two delivery options - only one needs to be configured:
#
# Option A: Resend (SaaS, recommended for cloud deployments)
#   Set RESEND_API_KEY to a key from resend.com and verify your sending domain there.
#   For local/dev use, leave RESEND_API_KEY empty - codes print to stdout. To
#   accept a fixed local code, also set MULTICA_DEV_VERIFICATION_CODE above
#   (ignored when APP_ENV=production).
RESEND_API_KEY=
RESEND_FROM_EMAIL=noreply@multica.ai
#
# Option B: SMTP relay (for self-hosted / on-premise deployments)
#   Takes priority over Resend when SMTP_HOST is set.
#   Supports unauthenticated relay (leave SMTP_USERNAME empty) and authenticated SMTP.
#   SMTP_FROM_EMAIL is the envelope/header sender for SMTP. If unset, SMTP
#     falls back to RESEND_FROM_EMAIL for backwards compatibility.
#   Set SMTP_TLS_INSECURE=true only for private CA or self-signed certificates.
#   SMTP_TLS controls the TLS mode:
#     - unset / "starttls" (default): plaintext connect, upgrade via STARTTLS.
#     - "implicit" (aliases: "smtps", "ssl"): TLS handshake on connect (SMTPS).
#       Required by providers that only offer port 465 and do not advertise
#       STARTTLS (e.g. Aliyun enterprise mail). Auto-enabled when SMTP_PORT=465
#       and SMTP_TLS is unset.
#   SMTP_EHLO_NAME is the EHLO/HELO name announced to the relay. Defaults to the
#     machine hostname; set a real FQDN when a strict relay (e.g. Google Workspace
#     smtp-relay.gmail.com) rejects the default and the connection drops as an EOF.
SMTP_HOST=
SMTP_PORT=25
SMTP_USERNAME=
SMTP_PASSWORD=
SMTP_FROM_EMAIL=
SMTP_TLS_INSECURE=false
SMTP_TLS=
SMTP_EHLO_NAME=

# Google OAuth
# The web login page reads GOOGLE_CLIENT_ID from /api/config at runtime, so
# changing it only requires restarting the backend / compose stack. No web
# rebuild is needed.
GOOGLE_CLIENT_ID=
GOOGLE_CLIENT_SECRET=
# Derived by docker-compose.selfhost.yml / local scripts from FRONTEND_ORIGIN.
# Set explicitly only when your OAuth callback URL differs from local frontend.
GOOGLE_REDIRECT_URI=${FRONTEND_ORIGIN}/auth/callback

# Casdoor OIDC (fork: docs/FORK-CASDOOR.md)
# When CASDOOR_CLIENT_ID is set, the web login page shows a "Sign in with Casdoor"
# button. Client secret stays server-side; /api/config exposes client_id + endpoint only.
CASDOOR_ENDPOINT=https://casdoor.gcoreinc.com
CASDOOR_CLIENT_ID=
CASDOOR_CLIENT_SECRET=
# Optional override when the OAuth callback URL differs from FRONTEND_ORIGIN.
CASDOOR_REDIRECT_URI=${FRONTEND_ORIGIN}/auth/callback

# S3 / CloudFront
# S3_BUCKET — bucket NAME only (e.g. "my-bucket"). Do NOT include the
# ".s3.<region>.amazonaws.com" suffix; the server builds the public URL
# from S3_BUCKET + S3_REGION. S3_REGION must match the bucket's real region.
S3_BUCKET=
S3_REGION=us-west-2
AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
# AWS_ENDPOINT_URL — optional S3-compatible endpoint (MinIO, RustFS, R2, etc.).
# For internal Docker/VPC hosts such as http://rustfs:9000, leave
# ATTACHMENT_DOWNLOAD_MODE=auto or set proxy explicitly so browsers/CLI do
# not need direct access to the object store.
AWS_ENDPOINT_URL=
# S3_USE_PATH_STYLE — optional S3 addressing mode. Empty preserves the default:
# true when AWS_ENDPOINT_URL is set for MinIO/LocalStack-style endpoints, false
# for AWS S3. Set to false for providers that require virtual-hosted-style URLs.
S3_USE_PATH_STYLE=
ATTACHMENT_DOWNLOAD_MODE=auto
ATTACHMENT_DOWNLOAD_URL_TTL=30m
CLOUDFRONT_KEY_PAIR_ID=
CLOUDFRONT_PRIVATE_KEY_SECRET=multica/cloudfront-signing-key
CLOUDFRONT_PRIVATE_KEY=
CLOUDFRONT_DOMAIN=
# COOKIE_DOMAIN — optional Domain attribute on session + CloudFront cookies.
# Leave empty for single-host deployments (localhost, LAN IP, or a single
# hostname) — session cookies become host-only, which is what the browser
# wants. Only set it when the frontend and backend sit on different
# subdomains of one registered domain (e.g. ".example.com"). Do NOT set it
# to an IP address: RFC 6265 forbids IP literals in the cookie Domain
# attribute and browsers silently drop such cookies.
COOKIE_DOMAIN=

# AUTH_TOKEN_TTL — auth token lifetime. Accepts Go duration strings (e.g.
# "8760h", "720h30m") or plain integer seconds.
# Default: 2592000 (30 days). Self-hosted deployments on trusted networks can
# set a longer value to reduce re-authentication frequency.
# Note: longer TTL = longer exposure window if a cookie is leaked.
# AUTH_TOKEN_TTL=2592000

# Local file storage (fallback when S3_BUCKET is not set)
LOCAL_UPLOAD_DIR=./data/uploads
# Derived by Makefile / local scripts from the backend port.
# Set explicitly only when uploads are served through a different public URL.
# LOCAL_UPLOAD_BASE_URL=http://localhost:8080

# Security
# Comma-separated list of allowed origins for CORS and WebSocket connections.
# Defaults to localhost dev origins when unset.
# Example: CORS_ALLOWED_ORIGINS=https://multica.ai,https://staging.multica.ai
CORS_ALLOWED_ORIGINS=

# ==================== Rate limiting (optional Redis) ====================
# Per-IP fixed-window rate limiter on the public auth endpoints
# (/auth/send-code, /auth/verify-code, /auth/google). Backed by Redis.
# When REDIS_URL is unset the limiter is a no-op (fail-open) and the
# backend logs "rate limiting disabled: REDIS_URL not configured" at
# startup. The same REDIS_URL is reused by the realtime fan-out hub,
# the PAT cache, and the daemon-token cache.
# REDIS_URL=redis://localhost:6379/0
# Set to "true" to skip the CLIENT SETNAME handshake on every Redis
# connection. Required for managed Redis providers that block the CLIENT
# command (e.g. GCP Memorystore, AWS ElastiCache with restricted ACLs).
# Default is false (client naming enabled for connection observability).
# REDIS_DISABLE_CLIENT_NAME=true
# Max requests per IP per minute. Defaults are 5 for send-code/google
# and 20 for verify-code.
# RATE_LIMIT_AUTH=5
# RATE_LIMIT_AUTH_VERIFY=20
# Comma-separated CIDRs whose X-Forwarded-For the auth limiter is
# allowed to trust. Empty (default) = never trust XFF, only RemoteAddr.
# REQUIRED behind a reverse proxy — otherwise every real user shares
# the proxy IP and the whole deployment lands in one bucket, turning
# /auth/send-code into 5 req/min site-wide. Use e.g. "127.0.0.1/32,::1/128"
# for same-host Caddy/Nginx, or the CDN's published ranges for ALB/CF.
# This is a separate list from MULTICA_TRUSTED_PROXIES above (which
# governs the autopilot webhook limiter).
# RATE_LIMIT_TRUSTED_PROXIES=

# Realtime metrics endpoint (/health/realtime) access control. See MUL-1342.
# When unset, the endpoint only serves direct loopback (127.0.0.1 / ::1)
# callers with no forwarding headers and returns 404 to everything else —
# safe for local dev. Any deployment behind a reverse proxy (Caddy / Nginx
# terminating TLS in front of localhost:8080) MUST set this token, since
# proxied requests look like loopback at the Go layer; with no token, those
# requests are refused with 404. Pass the token as
# `Authorization: Bearer <token>`.
# REALTIME_METRICS_TOKEN=

# GitHub App integration (Settings → GitHub "Connect GitHub")
# Both must be set for the Connect button to enable and for webhooks to be
# accepted; leave empty to disable the integration. See docs/github-integration.
# GITHUB_APP_SLUG is the tail of https://github.com/apps/<slug>.
GITHUB_APP_SLUG=
GITHUB_WEBHOOK_SECRET=
# Optional: GitHub App identity for App-authenticated REST calls. When set,
# the setup callback enriches the installation row with the real account
# login (org / user name) immediately after install. When unset, the row
# is created with the "unknown" placeholder and the next `installation`
# webhook from GitHub overwrites it — set both to skip that interim flash.
# GITHUB_APP_ID is the numeric "App ID" shown on the App's settings page.
# GITHUB_APP_PRIVATE_KEY is the full PEM block (including BEGIN/END lines)
# generated under "Private keys" on that same page; preserve newlines.
GITHUB_APP_ID=
GITHUB_APP_PRIVATE_KEY=

# Gitea integration (Settings → Gitea) — for teams running a private/
# self-hosted Gitea instance instead of GitHub. Unlike the GitHub App above,
# there is no marketplace install: each workspace admin pastes a Personal/Bot
# Access Token generated on the Gitea instance, and Multica registers repo
# webhooks via the Gitea API. See docs/gitea-integration.
# GITEA_BASE_URL is the origin of the single Gitea instance this deployment
# talks to, e.g. https://gitea.internal.example.com (no trailing slash).
GITEA_BASE_URL=
# Shared secret Multica sends when registering each repo webhook and verifies
# against the X-Gitea-Signature header on inbound webhook deliveries.
GITEA_WEBHOOK_SECRET=
# Base64-encoded 32-byte key that encrypts each workspace's pasted PAT at
# rest (mirrors MULTICA_SLACK_SECRET_KEY below). Required — without it the
# Gitea integration stays disabled even if the two vars above are set.
# Generate one with: openssl rand -base64 32
MULTICA_GITEA_SECRET_KEY=

# Lark / Feishu bot integration (Settings → Integrations "Bind to Lark")
# Off until MULTICA_LARK_SECRET_KEY is set — a base64-encoded 32-byte key
# that encrypts each Bot's app secret at rest. Leave empty to disable.
# Generate one with: openssl rand -base64 32
MULTICA_LARK_SECRET_KEY=
# Mainland 飞书 and international Lark are auto-detected per installation
# (at QR scan) and served side by side — LEAVE THESE EMPTY for normal use.
# They are optional deployment-wide overrides that force EVERY installation
# onto one host (a proxy, a mock for tests, or a single-cloud staging
# setup); HTTP drives outbound Open Platform API calls, CALLBACK the inbound
# long-conn bootstrap. NOTE: if you previously ran international Lark by
# setting these to https://open.larksuite.com, the server relabels your
# existing installs to region=lark on first boot after upgrade, so you can
# clear these afterwards. See docs/lark-bot-integration.
MULTICA_LARK_HTTP_BASE_URL=
MULTICA_LARK_CALLBACK_BASE_URL=
# Optional fixed HTTP CONNECT proxy URL for Lark/Feishu WebSocket long-conn
# handshakes. Leave empty to use standard HTTP_PROXY / HTTPS_PROXY / NO_PROXY
# environment handling.
MULTICA_LARK_WS_PROXY_URL=

# Frontend
# Leave empty — auto-derived from page origin in browser, set by Makefile for local dev.
# NEXT_PUBLIC_API_URL also feeds the Next.js SSR proxy when explicitly set.
NEXT_PUBLIC_API_URL=
NEXT_PUBLIC_WS_URL=

# Remote API (optional) — set to proxy local frontend to a remote backend
# Leave empty to use local backend (localhost:8080)
# REMOTE_API_URL=https://multica-api.copilothub.ai

# ==================== Self-hosting: Control Signups (fixes #930) ====================
# Set to "false" to completely disable new user signups (recommended for private instances)
ALLOW_SIGNUP=true
# The web UI reads ALLOW_SIGNUP from /api/config at runtime, so toggling this
# only requires restarting the backend / compose stack — not rebuilding web.
# It is not hot-reloaded.

# Optional: Only allow emails from these domains (comma-separated)
ALLOWED_EMAIL_DOMAINS=

# Optional: Only allow these exact email addresses (comma-separated)
ALLOWED_EMAILS=

# Set to "true" to disable workspace creation for every caller on this
# instance (#3433). Operators usually leave this unset, bootstrap the
# shared workspace, then flip this to "true" and restart so subsequent
# users join only via invitations and the entire deployment is visible to
# the platform admin. The web UI reads this from /api/config at runtime,
# so toggling requires a backend restart but not a frontend rebuild.
DISABLE_WORKSPACE_CREATION=

# ==================== Analytics (PostHog) ====================
# Product analytics events feed the acquisition → activation → expansion funnel.
# Leave POSTHOG_API_KEY empty for local dev / self-hosted instances; the server
# will run a no-op analytics client and ship nothing. See docs/analytics.md.
POSTHOG_API_KEY=
POSTHOG_HOST=https://us.i.posthog.com
# Optional override for the `environment` PostHog event property.
# Defaults from APP_ENV and normalizes to production / staging / dev.
ANALYTICS_ENVIRONMENT=
# Force the no-op client even when POSTHOG_API_KEY is set (CI / opt-out).
ANALYTICS_DISABLED=