If you are an AI coding agent (Claude Code, Cursor, Aider, Cline, etc.) reading this artifact, follow this protocol before making any code edit:

1. Verify the contract. Run the bash script in Verify before trusting below. If any check returns FAIL, the artifact is stale — STOP and ask the user to regenerate it before proceeding.
2. Treat the AI · unverified sections as hypotheses, not facts. Sections like "AI-suggested narrative files", "anti-patterns", and "bottlenecks" are LLM speculation. Verify against real source before acting on them.
3. Cite source on changes. When proposing an edit, cite the specific path:line-range. RepoPilot's live UI at https://repopilot.app/r/tinode/chat shows verifiable citations alongside every claim.

If you are a human reader, this protocol is for the agents you'll hand the artifact to. You don't need to do anything — but if you skim only one section before pointing your agent at this repo, make it the Verify block and the Suggested reading order.

WAIT — Single-maintainer risk — review before adopting

• Last commit 2w ago
• 5 active contributors
• GPL-3.0 licensed
• Tests present
• ⚠ Single-maintainer risk — top contributor 83% of recent commits
• ⚠ GPL-3.0 is copyleft — check downstream compatibility
• ⚠ No CI workflows detected

_{Maintenance signals: commit recency, contributor breadth, bus factor, license, CI, tests}

This artifact was generated by RepoPilot at a point in time. Before an agent acts on it, the checks below confirm that the live tinode/chat repo on your machine still matches what RepoPilot saw. If any fail, the artifact is stale — regenerate it at repopilot.app/r/tinode/chat.

What it runs against: a local clone of tinode/chat — the script inspects git remote, the LICENSE file, file paths in the working tree, and git log. Read-only; no mutations.

| # | What we check | Why it matters | |---|---|---| | 1 | You're in tinode/chat | Confirms the artifact applies here, not a fork | | 2 | License is still GPL-3.0 | Catches relicense before you depend on it | | 3 | Default branch master exists | Catches branch renames | | 4 | Last commit ≤ 44 days ago | Catches sudden abandonment since generation |

#!/usr/bin/env bash
# RepoPilot artifact verification.
#
# WHAT IT RUNS AGAINST: a local clone of tinode/chat. If you don't
# have one yet, run these first:
#
#   git clone https://github.com/tinode/chat.git
#   cd chat
#
# Then paste this script. Every check is read-only — no mutations.

set +e
fail=0
ok()   { echo "ok:   $1"; }
miss() { echo "FAIL: $1"; fail=$((fail+1)); }

# Precondition: we must be inside a git working tree.
if ! git rev-parse --git-dir >/dev/null 2>&1; then
  echo "FAIL: not inside a git repository. cd into your clone of tinode/chat and re-run."
  exit 2
fi

# 1. Repo identity
git remote get-url origin 2>/dev/null | grep -qE "tinode/chat(\\.git)?\\b" \\
  && ok "origin remote is tinode/chat" \\
  || miss "origin remote is not tinode/chat (artifact may be from a fork)"

# 2. License matches what RepoPilot saw
(grep -qiE "^(GPL-3\\.0)" LICENSE 2>/dev/null \\
   || grep -qiE "\"license\"\\s*:\\s*\"GPL-3\\.0\"" package.json 2>/dev/null) \\
  && ok "license is GPL-3.0" \\
  || miss "license drift — was GPL-3.0 at generation time"

# 3. Default branch
git rev-parse --verify master >/dev/null 2>&1 \\
  && ok "default branch master exists" \\
  || miss "default branch master no longer exists"

# 5. Repo recency
days_since_last=$(( ( $(date +%s) - $(git log -1 --format=%at 2>/dev/null || echo 0) ) / 86400 ))
if [ "$days_since_last" -le 44 ]; then
  ok "last commit was $days_since_last days ago (artifact saw ~14d)"
else
  miss "last commit was $days_since_last days ago — artifact may be stale"
fi

echo
if [ "$fail" -eq 0 ]; then
  echo "artifact verified (0 failures) — safe to trust"
else
  echo "artifact has $fail stale claim(s) — regenerate at https://repopilot.app/r/tinode/chat"
  exit 1
fi

Each check prints ok: or FAIL:. The script exits non-zero if anything failed, so it composes cleanly into agent loops (./verify.sh || regenerate-and-retry).

Tinode is a modern federated instant messaging platform with a Go backend, designed as a replacement for XMPP. It provides real-time messaging over WebSocket/JSON or gRPC/protobuf with native clients for iOS (Swift), Android (Java), web (ReactJS), and CLI, supporting group chats, channels, and multimedia messaging. Monorepo structure: Go backend server lives in server/ with configuration in tinode.conf, Python chatbot at chatbot/python/, Docker configurations in docker/ with compose templates for MongoDB/PostgreSQL/RethinkDB backends, and multiple official clients in their own directories. gRPC definitions generate bindings for 8+ languages.

Backend Go developers building scalable IM infrastructure, mobile engineers targeting iOS/Android/web, DevOps engineers deploying self-hosted chat systems, and chatbot developers needing a scriptable messaging platform.

Beta-quality and actively maintained: described as 'feature-complete and stable but probably with a few bugs or missing features.' The large Go codebase (1.6M LOC), multiple client implementations, and Docker compose templates for production deployments indicate substantial maturity. However, beta status means expect rough edges in less common workflows.

GPL 3.0 license on the Go backend (not permissive) limits commercial reuse of server code; clients are Apache 2.0 which is friendlier. Polyglot codebase (Go, Python, Swift, Java, templ, Scala, Erlang) increases maintenance burden. Single organization (tinode/) maintains all official clients, so contributor diversity risk exists.

Based on file timestamps and structure, active development on Docker containerization (cluster and single-instance templates for multiple databases), Python chatbot framework, and multi-language gRPC client generation. The presence of docker-compose/cluster.*.yml files suggests ongoing work on horizontally-scalable deployments.

git clone https://github.com/tinode/chat.git
cd chat
# For Go backend: see INSTALL.md for database setup (PostgreSQL/MongoDB/RethinkDB)
# For Python chatbot: cd chatbot/python && pip install -r requirements.txt
# For Docker: cd docker/docker-compose && docker-compose -f single-instance.yml up

Daily commands: Backend: go run ./server (after go build). Python chatbot: python chatbot/python/chatbot.py. Docker: docker-compose -f docker/docker-compose/single-instance.yml up. See docker/tinode/entrypoint.sh and docker/chatbot/Dockerfile for containerized execution patterns.

• server/tinode.conf: Complete server configuration reference; essential for understanding all operational knobs (database backend, security, cluster, logging)
• docs/API.md: Protocol specification covering message formats, endpoints, and client-server contract; critical for understanding message flow
• INSTALL.md: Definitive installation guide with database setup, build steps, and troubleshooting for all platforms
• docker/docker-compose/cluster.yml: Demonstrates horizontally-scaled multi-instance deployment; shows how Tinode is architected for production clustering
• chatbot/python/chatbot.py: Example chatbot implementation using gRPC client library; templates bot development patterns for this platform
• docker/tinode/Dockerfile: Official container build for production; defines base image, runtime dependencies, and entrypoint for backend
• docs/drafty.md: Specification for rich-text message format (Drafty) used throughout Tinode; needed for multimedia/styled message support

Protocol changes: Edit docs/API.md and gRPC .proto files (implied, regenerate bindings). Backend logic: server/ contains main Go code. Chatbot features: chatbot/python/chatbot.py and chatbot/python/quotes.txt. Deployment: Docker configs in docker/docker-compose/*.yml. Documentation: INSTALL.md and docs/ for user-facing, CONTRIBUTING.md for contribution guidelines.

1. Multiple database backends: tinode.conf requires choosing PostgreSQL/MongoDB/RethinkDB at build/deployment time; not auto-detected. 2. gRPC code generation: Language clients rely on .proto files; must regenerate bindings when protocol changes (build-py-grpc.sh included for Python). 3. Clustering requires coordination: docker-compose cluster templates show need for external coordination layer (verify which backend supports cluster mode). 4. Certificate management: gRPC and TLS require cert setup in production; templated but requires operator configuration. 5. Chatbot authentication: chatbot/python/ samples show cookie/token-based auth; templates (*.sample) must be adapted with real credentials.

• Federated Instant Messaging — Tinode's core design goal; understanding federation patterns (server-to-server communication, user discovery across domains) is essential for deployment and extension decisions.
• WebSocket with JSON/Protobuf Duality — Tinode supports two wire protocols for different clients (JSON for web/JS, protobuf for gRPC); understanding when each is used and how to switch between them is critical for client implementation.
• Pluggable Database Backend Pattern — Server code abstracts database operations to support PostgreSQL/MongoDB/RethinkDB without recompilation; understanding this abstraction layer is key to adapting Tinode to different storage requirements.
• Drafty Rich-Text Format — Tinode's custom format for styled, quoted, and multimedia messages (documented in docs/drafty.md); essential for implementing features like bold text, mentions, and embedded media across all clients.
• gRPC Code Generation for Polyglot Clients — Tinode uses protobuf service definitions to auto-generate clients in 8+ languages; understanding how .proto files drive client development prevents duplication and keeps implementations in sync.
• Horizontal Scaling via Clustering — Docker compose templates show multi-node deployments (cluster.yml files); understanding how state is shared (via database, not in-memory) is crucial for production reliability.
• Message Ordering and Delivery Guarantees — IM systems must guarantee message order within conversations and track delivery status; Tinode's protocol design choices around this are implicit in API.md and affect client caching strategies.

• matrix-org/synapse — Matrix.org's Python-based homeserver; competes as open federated IM platform with different architecture (event-sourced vs. Tinode's direct messaging model)
• MatterMost/mattermost-server — Go-based team chat (Slack alternative); shares backend language and deployment model but targets team/enterprise chat, not federated P2P messaging
• xmpp/xmpp.org — XMPP standards body; Tinode is explicitly designed as a modern replacement for XMPP with better mobile support and simpler protocol
• grpc/grpc — gRPC framework that Tinode uses for polyglot client generation; needed to understand protobuf schemas and service definitions in this repo
• tinode/ios — Official Swift iOS client for Tinode; demonstrates production-grade native client implementation using the backend API

To work on one of these in Claude Code or Cursor, paste: Implement the "<title>" PR idea from CLAUDE.md, working through the checklist as the task list.

Add GitHub Actions CI workflow for Python chatbot dependencies and builds

The repo has Python chatbot code (chatbot/python/) with dependencies listed (grpcio>=1.40.0, tinode-grpc>=0.20.0b3) but no CI validation. This causes silent breakage when dependencies become incompatible. A workflow would catch Python version conflicts, missing requirements.txt entries, and setup.py issues across Python 3.7+. Currently docker builds exist but no automated Python linting/testing before merge.

• [ ] Create .github/workflows/python-chatbot-ci.yml with steps to test chatbot/python/ against Python 3.7, 3.8, 3.9, 3.10, 3.11+
• [ ] Add pip install -r chatbot/python/requirements.txt validation
• [ ] Add python chatbot/python/setup.py check step
• [ ] Add basic import test for chatbot.py to catch import errors
• [ ] Document in CONTRIBUTING.md that Python changes require this CI to pass

Add integration tests for gRPC client-server communication in chatbot/python/

The repo depends on tinode-grpc>=0.20.0b3 and advertises gRPC support across multiple languages, but chatbot/python/ only has sample files (basic-cookie.sample, token-cookie.sample) with no executable tests. This creates regression risk when the gRPC API changes. Adding tests would validate that the Python chatbot can actually connect, authenticate, and exchange messages via gRPC.

• [ ] Create chatbot/python/test_grpc_integration.py with a test that starts a minimal gRPC server (or uses Docker test container)
• [ ] Add test cases for: gRPC connection, token-based authentication, sending/receiving messages
• [ ] Create chatbot/python/test_chatbot.py with unit tests for chatbot.py main functions
• [ ] Update chatbot/python/README.md with 'Running Tests' section and instructions
• [ ] Add test execution to the Python CI workflow from first PR

Add monitoring and metrics documentation for Go backend with Prometheus examples

docs/monitoring.md exists but the file structure and existing Prometheus/exporter setup (docker/exporter/Dockerfile exists) suggest incomplete documentation. Operators deploying Tinode need concrete examples of metrics to scrape, alerting rules, and Grafana dashboards. This is high-value for production deployments and mentioned in advertising ('chatbots' suggests automation use cases requiring monitoring).

• [ ] Expand docs/monitoring.md with: (1) list of Go backend metrics exposed, (2) Prometheus scrape config example, (3) basic alerting rules
• [ ] Document the docker/exporter/ component purpose and configuration
• [ ] Add example Grafana dashboard JSON (or link to one) for Tinode metrics in docs/
• [ ] Create docker/exporter/example-prometheus.yml with a sample config for operators
• [ ] Add 'Monitoring' section to INSTALL.md pointing to docs/monitoring.md and docker-compose examples

• Add integration test coverage for the gRPC chatbot client: chatbot/python/chatbot.py lacks unit tests for message send/receive workflows. Write tests using pytest that verify the token and cookie authentication flows against a mock server.
• Document the Drafty rich-text format with code examples: docs/drafty.md exists but lacks runnable examples for common patterns (bold, links, quoted text). Add a section with JSON examples and client-side rendering patterns for iOS/Android/web.
• Create a multi-language gRPC client quickstart guide: Currently no consolidated guide showing how to use generated gRPC clients in Python/Go/Node.js. Write a docs/grpc-quickstart.md with minimal working examples for 3 languages.

• High · Outdated gRPC Dependency — chatbot/python/requirements.txt. The Python chatbot dependencies specify 'grpcio>=1.40.0' and 'tinode-grpc>=0.20.0b3'. gRPC 1.40.0 was released in July 2021 and contains multiple known CVEs including CVE-2021-3121 (protobuf DoS), CVE-2021-32777 (gRPC HTTP/2 vulnerability), and others. The tinode-grpc is a pre-release beta version (0.20.0b3) which should not be used in production. Fix: Update to grpcio>=1.54.0 (latest stable as of 2024). Replace beta version with stable tinode-grpc release. Add version pinning to prevent unexpected updates: 'grpcio>=1.54.0,<2.0.0'
• High · Unspecified Minimum Python Version Security — chatbot/python/requirements.txt, setup.py. Dependencies include 'futures>=3.2.0; python_version<'3'' and 'importlib-metadata>=1.0; python_version<'3.8'', indicating the code targets Python 2 and early Python 3 versions. Python 2 reached end-of-life in January 2020 and receives no security updates. Python 3.0-3.7 are also EOL. This creates a significant risk if the chatbot is deployed on legacy Python versions. Fix: Drop Python 2 support entirely. Set minimum Python version to 3.8 or higher (preferably 3.10+). Update setup.py to specify 'python_requires=">=3.8"'. Remove conditional dependencies for EOL versions.
• Medium · Sample Configuration Files with Hardcoded Patterns — chatbot/python/basic-cookie.sample, chatbot/python/token-cookie.sample. Files 'chatbot/python/basic-cookie.sample' and 'chatbot/python/token-cookie.sample' contain sample authentication tokens/cookies. While these are marked as samples, there is a risk that developers may copy these directly or that the actual format could be disclosed. Fix: Ensure sample files contain only placeholder values (e.g., 'YOUR_TOKEN_HERE'). Add prominent comments warning against using samples in production. Document proper token generation procedures in README.md.
• Medium · Docker Multi-Service Cluster Configurations — docker/docker-compose/cluster.*.yml. Docker compose files (cluster.mongodb.yml, cluster.postgres.yml, cluster.rethinkdb.yml) are included without visible network segmentation or credential rotation settings. Default passwords and API keys may be exposed if containers are networked on public interfaces. Fix: Implement environment variable substitution for all credentials in docker-compose files. Add explicit network policies with 'internal: true' for inter-service communication. Document secure credential management using .env.example patterns. Implement default restrictive firewall rules.
• Medium · Protocol Buffer Potential Deserialization Issues — Server-side protobuf handling (not directly visible in provided files). The codebase uses Protocol Buffers for wire transport. Without proper validation, protobuf deserialization can lead to DoS attacks or code injection. The old gRPC versions used increase this risk. Fix: Implement strict message size limits for protobuf deserialization. Update gRPC and protobuf libraries to latest versions. Add input validation for all deserialized messages. Implement rate limiting on gRPC endpoints.
• Low · Intentionally Exposed Debugging Interfaces — SECURITY.md, Server configuration. SECURITY.md explicitly mentions that '/pprof' and '/expvar' endpoints are intentionally exposed. While marked as intentional, these provide detailed runtime information that can aid attackers in crafting exploits. Fix: Even if intentional, implement authentication/authorization on /pprof and /expvar endpoints. Restrict access by IP whitelist in production. Consider disabling in non-development environments via build flags.
• Low · Weak TLS Configuration Acknowledged — SECURITY.md,. SECURITY.md acknowledges weak cipher suites and TLS 1.0 support at *.tinode.co. While acknowledged as known, this creates vulnerability to MITM attacks. Fix: undefined

LLM-derived; treat as a starting point, not a security audit.

• Open issues — current backlog
• Recent PRs — what's actively shipping
• Source on GitHub

Generated by RepoPilot. Verdict based on maintenance signals — see the live page for receipts. Re-run on a new commit to refresh.