QuillBot — Discord Bot for Minecraft Server Administration

AI-powered Discord bot for the Miners' Refuge community. Helps Minecraft server admins troubleshoot logs, diagnose performance with Spark, search documentation, and find plugins — all from Discord.

Built with discord.py + RAG (Retrieval-Augmented Generation) over multiple documentation sources.

Features

Category	Capability
Q&A (RAG)	Answers questions grounded in indexed docs (Miners' Refuge, PaperMC, PurpurMC, Spark)
General Chat	Open-ended assistant with web search, server/history context awareness
Log Analysis	AI analysis of mclo.gs/pastebin links, file uploads, and screenshots
Error Detection	Instant passive replies for 20+ known Minecraft error patterns
Spark Profiler	Full report parsing, bottleneck diagnosis, platform-aware recommendations
Plugin Search	Concurrent search across Modrinth, Hangar, SpigotMC
Server Tools	JVM flags, server status checks, docs changelog

All AI responses are in Brazilian Portuguese and formatted for Discord embeds.

Slash Commands

AI-Powered Commands

`/ask <question> [image]`

Ask any Minecraft server administration question. Uses an agentic RAG loop — the LLM automatically calls search_docs, search_plugins, search_history, and context tools to ground its answer in real documentation.

Model: CHAT_MODEL (default: qwen/qwen3.6-plus)
Tools available: search_docs, search_plugins, get_channel_history, get_guild_info, search_history, get_message_context
Features: Image/screenshot analysis, 5-minute ephemeral prompt+report cache, paginated multi-embed output with source links, reply to continue conversation (30 min TTL, 200 conversations), cooldown per user
Follow-up: Reply to the bot's response to continue the conversation with full history

`/chat <question> [image]`

General-purpose assistant (same agentic loop as /ask but with web search).

Tools: web_search, web_extract (via Tavily), plus the same context/history tools as /ask
Web search: Supports search_depth (basic/advanced), time_range, domain filtering
Reply follow-up and @mention mode: Mention the bot (@QuillBot <question>) to chat without a slash command — same rate-limit and conversation handling as /chat
Set CHAT_MENTION_ENABLED=false to disable mention mode

`/analyze [log_link] [log_file] [image]`

AI-powered log/crash-report analysis.

Inputs (at least one required):
- log_link — mclo.gs or pastebin.com URL (parsed to raw API endpoint)
- log_file — .log or .txt attachment (auto-uploaded to mclo.gs for sharing, streaming read up to 5 MB)
- image — screenshot of an error/log (vision model)
Processing: Sanitizes non-printable chars, extracts relevant lines for large logs (keeps 60 header lines + error/warning/exception lines, truncates to 12k chars), sends to LLM with a structured diagnostic prompt
Output: Sections — Resumo, Erros Encontrados, Avisos, Recomendações (only non-empty sections shown)
Button fallback: When a pasted log has no regex pattern match, a "🔍 Analisar com IA" button is offered to trigger the same analysis

`/spark <url>`

Analyze a Spark Profiler report with deep AI diagnosis.

Input: Full https://spark.lucko.me/<code> URL or bare report code
Parser (spark_parser.py): Fetches from spark-json-service.lucko.me, extracts server identity, JVM flags, TPS/MSPT, GC, CPU hotspots (chain-collapsed call tree with self_pct), world/entity stats, configs, game rules, plugins
LLM flow: Injects a compact summary (~1.7k chars) as synthetic prior exchange, follows an 8-step diagnostic protocol (TPS → MSPT → lag spike detection → waitForNextTick → GC → hotspots → config → grounded recommendation), uses SPARK_MODEL (default: google/gemini-2.5-pro)
Spark tools: get_spark_detail (sections: hotspots, jvm, profiler, plugins, world, game_rules, configs:<file>) and get_config_key (single-key lookup)
Platform awareness: Detects Paper/Purpur/Spigot/Forge/Fabric/Vanilla and never recommends configs that don't exist for that platform
Passive detection: Any spark.lucko.me link in chat triggers a "🔥 Analisar com IA" button

`/reindex [source]` (Admin only)

Re-index documentation vectors.

Without source: full reindex of all DOC_SOURCES
With source: reindex a single source by label (e.g. PaperMC)
Shows ⏳ Indexando... guard — blocks /ask//docs queries during indexing
Per-source commit SHA tracking for granular updates

Utility Commands

Command	Description	Input
`/docs [query]`	Search indexed docs (RAG) or show docs link. Supports all sources + source label prefix.	`query` (optional)
`/plugin <name>`	Search Modrinth, Hangar, SpigotMC concurrently. Paginated view (one source per page). Autocomplete via Modrinth.	`name` (required)
`/status <ip>`	Check Minecraft server status via `mcsrvstat.us`. Shows MOTD, player count, version.	`ip` (hostname or IP, optional port)
`/changelog`	Last 5 commits to `MinersRefuge/docs` (SHA, message, author, date) via GitHub API.	—
`/flags <ram>`	Generate Aikar's JVM flags for a given RAM amount in MB. Auto-tunes G1GC thresholds at >= 12 GB. Validates 512–65536 MB range.	`ram` (MB, integer)
`/plov`	Embed: PLOV info needed to choose hosting — Plano/Players, Localização, Orçamento, Versão.	—
`/plano`	Embed: info needed to recommend a plan — Version, Players, Mods/Plugins, Gamemode.	—
`/health`	(Admin) Bot diagnostics: uptime, concurrent API pings (OpenRouter, Tavily, GitHub, mclo.gs, Modrinth) with latency, vector store stats, web search status, conversation cache usage, WebSocket latency.	—
`/sync`	(Admin) Re-sync slash commands with Discord.	—
`/help`	Auto-generated list of all registered slash commands + passive feature summary.	—

Passive Features

The bot monitors every non-bot message via on_message listeners (load order: log_analyzer → history_rag → commands → spark → docs_rag).

1. Paste Service Link Detection (`log_analyzer`)

Triggers on: https://mclo.gs/<id> and https://pastebin.com/<id>
Behavior: Reacts with 👀, fetches raw content (streaming, 5 MB cap), checks against known error patterns
- If matched: Replies instantly with the pattern's troubleshooting response
- If no match + AI available: Replies with "🤔 Não reconheci nenhum erro" + "🔍 Analisar com IA" button

2. File Attachment Handling (`log_analyzer`)

Triggers on: .log / .txt attachments
Behavior: Reads file (streaming), checks error patterns, uploads to mclo.gs (POST /1/log), replies with the mclo.gs link (or a fallback message). If large (> 5 MB), notes truncation. Offers AI analysis button when no pattern matches.

3. Known Error Pattern Matching (`responses/errors.py`)

25 pre-compiled regex patterns — first match wins (specific before generic):

Category	Examples
Plugin	Ambiguous plugin name, missing dependency, `Error occurred while enabling`, `Could not pass event`
Startup / JAR	`Unable to access jarfile`, `Current Java is X but we require Y`, `Unsupported Java`, `JNI error`
EULA	`You need to agree to the EULA`
Memory	`OutOfMemoryError`, `Can't keep up! Is the server overloaded?`
Port / Network	`FAILED TO BIND TO PORT`, `Perhaps a server is already running on that port`
World / Data	`Failed to load chunk`, `Region file is truncated`, `Session lock is no longer valid`
Permissions	`<player> was denied the command`
Version	`Outdated server`, `Outdated client`
Crash	`This crash report has been saved to`, `---- Minecraft Crash Report ----`
Generic	`The received string length is longer than maximum allowed`, `Connection throttled`

4. Spark URL Detection (`spark`)

Regex https://spark.lucko.me/<code> → replies "🔥 Relatório Spark detectado!" with analysis button.

5. Reply-Based Follow-Up Conversations (`docs_rag` + `commands`)

Reply to any /ask, /chat, or /spark bot response to continue the thread. The bot replays up to 16 history turns (for /ask//spark) with the Spark report carried forward. Per-user cooldown enforced. Supports image attachments in follow-ups.

6. @Mention Chat (`commands`)

Mention the bot with a question (@QuillBot como otimizar meu servidor?) — equivalent to /chat with the same tool loop and conversation storage.

7. Server History Indexing (`history_rag`)

Background RAG over the entire Discord server's message history:

Backfill on startup: reads all accessible text channels/threads (oldest-first, configurable limit)
Live ingestion: Every new message is chunked with a 5-message sliding window for local context, embedded, and persisted per-guild (data/history/<guild_id>.json + .npy)
Dedup + deletion: Tracks msg_id → index, handles on_message_delete
Search tool: search_history / search_docs equivalent available to the LLM in all agentic loops

AI & RAG System

Embedding & Search

Provider: Switchable via EMBEDDING_PROVIDER — openai (remote, default) or local (sentence-transformers, e.g. all-MiniLM-L6-v2)
Models: EMBEDDING_MODEL (default qwen/qwen3-embedding-8b), RERANK_MODEL (default cohere/rerank-4-fast)
Reranking: Enabled when RERANK_ENABLED=true and OPENAI_BASE_URL is OpenRouter — reranks top 3×top_k candidates via the OpenRouter /rerank endpoint, falls back to cosine similarity
Storage: data/vectors.json (metadata) + data/vectors.npy (float32 binary embeddings) — migrated automatically from old JSON-embedded format
Chunking: Markdown split by headings (##/#), then by 1500-char paragraph windows; title extracted from frontmatter or first #

Agentic Tool Loop (`cogs/utils.py:run_tool_loop`)

Shared loop used by /ask, /chat, and Spark analysis:

while tool_calls and rounds < MAX_TOOL_ROUNDS:
  → display status label on deferred interaction
  → execute each tool (deduplicate sources via dedup_key)
  → append tool results (truncated to 6000 chars)
→ final answer (max_tokens=2048)
→ paginated embeds + source pages

Parallel tool calls per round when the LLM requests multiple

Rate Limiting

COOLDOWN_RATE / COOLDOWN_PER (default 1 per 30s) per user on /ask, /chat, /analyze. Follow-up replies share a TTLCache cooldown. Exceeding returns an ephemeral ⏳ Aguarde Xs message.

Context Injection

Every AI call receives a <contexto> block with user (display name, account age, join date, roles), guild (name, member count, channels, roles), channel, and temporal (BRT + UTC) context.

Documentation Sources

Configured in config.py:DOC_SOURCES. Each entry:

Key	Required	Description
`repo`	Yes	GitHub `owner/name`
`branch`	Yes	Branch to index
`base_url`	Yes	Docs website base URL
`label`	Yes	Human-readable label shown in results
`summary`	No	Path to mdBook `SUMMARY.md` for discovery
`path_prefix`	No	Only index files under this prefix
`url_strip_prefix`	No	Strip prefix when building website URLs
`max_files`	No	Cap per source (default 200)

Source	Label	Discovery	Base URL
`MinersRefuge/docs`	Miners' Refuge	`SUMMARY.md`	https://docs.minersrefuge.com.br
`PaperMC/docs`	PaperMC	Tree API (`src/content/docs/paper/admin/`)	https://docs.papermc.io
`PurpurMC/PurpurDocs`	PurpurMC	Tree API (`mkdocs/purpur/`)	https://purpurmc.org/docs/purpur/
`lucko/spark-docs`	Spark	Tree API (`docs/`)	https://spark.lucko.me/docs/

Periodic reindex every REINDEX_INTERVAL_HOURS (default 6h) via composite MD5 of all latest commit SHAs.

Project Structure

QuillBot/
├── main.py               # Entrypoint — validates config, loads cogs in order, syncs slash commands
├── config.py             # Centralized env-var config, DOC_SOURCES, feature flags
├── requirements.txt
├── Dockerfile
├── docker-compose.yml
├── cogs/
│   ├── commands.py       # /chat, /docs, /help, /flags, /plov, /plano, /health, /sync + @mention & reply follow-ups
│   ├── docs_rag.py       # RAG pipeline — indexing, search, reranking, /ask, /reindex, agentic loop + Spark diagnosis
│   ├── history_rag.py    # Server-wide history RAG — backfill, live ingestion, per-guild vector stores
│   ├── log_analyzer.py   # Passive log detection, pattern matching, /analyze, file upload to mclo.gs
│   ├── plugins.py        # /plugin, /status, /changelog — plugin search & server status
│   ├── spark.py          # /spark command + passive spark.lucko.me detection
│   ├── spark_parser.py   # Spark JSON parsing, summary/detail builders, call-tree rendering
│   ├── plugin_apis.py    # Shared Modrinth/Hangar/SpigotMC API helpers
│   ├── tavily_tools.py   # Tavily web_search / web_extract tool definitions & execution
│   └── utils.py          # Shared: truncate_safe, split_response, PaginatedEmbedView, context builders, run_tool_loop
├── responses/
│   └── errors.py         # 25 compiled Minecraft error regex patterns + pt-BR responses
└── data/
    ├── vectors.json/.npy # Docs RAG vector store
    └── history/          # Per-guild history stores

Installation

Requires Python 3.11+

git clone https://github.com/Zeptiny/QuillBot.git
cd QuillBot
pip install -r requirements.txt

Discord Bot Setup

Create a bot at https://discord.com/developers/applications
Under Bot → Privileged Gateway Intents enable Message Content Intent
Invite with scopes bot + applications.commands and permissions: Send Messages, Embed Links, Read Message History, Add Reactions, Use Application Commands

Configuration

Copy and fill in your environment file:

cp .env.example .env   # if available, otherwise create .env manually

Required

Variable	Description
`BOT_TOKEN`	Discord bot token — bot will not start without it
`OPENROUTER_API_KEY`	API key for OpenRouter (or any OpenAI-compatible provider). Required for all AI commands. Also aliased as `OPENAI_API_KEY` / `LLM_API_KEY`

AI Models

Variable	Default	Description
`OPENAI_BASE_URL`	`https://openrouter.ai/api/v1`	OpenAI-compatible endpoint. Aliases: `LLM_BASE_URL`, `OPENROUTER_BASE_URL`
`CHAT_MODEL`	`qwen/qwen3.6-plus`	Used for `/ask`, `/chat`, `/analyze`
`SPARK_MODEL`	`google/gemini-2.5-pro`	Used only during active Spark sessions
`EMBEDDING_MODEL`	`qwen/qwen3-embedding-8b`	Doc/history embedding model
`RERANK_MODEL`	`cohere/rerank-4-fast`	Reranking model
`EMBEDDING_PROVIDER`	`openai`	`openai` (remote) or `local` (sentence-transformers)
`LOCAL_EMBEDDING_MODEL`	`sentence-transformers/all-MiniLM-L6-v2`	Model when `EMBEDDING_PROVIDER=local`
`LOCAL_EMBEDDING_DEVICE`	`cpu`	Device for local embeddings
`RERANK_ENABLED`	`true`	Enable reranking (only when base URL is OpenRouter)

Feature Flags

Variable	Default	Description
`WEB_SEARCH_ENABLED`	`true`	Enable Tavily web search
`TAVILY_API_KEY`	—	Required when web search is enabled
`CHAT_MENTION_ENABLED`	`true`	Enable @mention chat mode
`HISTORY_ENABLED`	`true`	Enable server history RAG
`LOG_LEVEL`	`INFO`	Python logging level

History RAG

Variable	Default	Description
`HISTORY_VECTOR_STORE_DIR`	`data/history`	Per-guild history storage dir
`HISTORY_WINDOW_SIZE`	`5`	Sliding window of prior messages per chunk
`HISTORY_BACKFILL_LIMIT`	(none)	Max messages to backfill per channel (unset = all)
`HISTORY_MAX_MSG_LENGTH`	`800`	Max chars per message in history chunks
`HISTORY_EXCLUDE_BOTS`	`true`	Exclude bot messages from history

Docs / RAG Indexing

Variable	Default	Description
`VECTOR_STORE_PATH`	`data/vectors.json`	Docs vector store path
`REINDEX_INTERVAL_HOURS`	`6`	Hours between automatic reindex checks

Other

Variable	Default	Description
`COOLDOWN_RATE`	`1`	Allowed uses per cooldown window
`COOLDOWN_PER`	`30`	Cooldown window in seconds (per user)
`MAX_CONTENT_SIZE`	`5242880`	Max bytes fetched from paste services (5 MB)
`MAX_LOG_CONTEXT`	`12000`	Max chars sent to LLM for log analysis

Running the Bot

python main.py

On startup the bot:

Validates BOT_TOKEN (exits if missing; warns if TAVILY_API_KEY missing while web search is enabled)
Loads cogs in order: log_analyzer → history_rag → commands → plugins → spark → docs_rag
Loads cached vectors from disk or indexes all doc sources
Starts periodic reindex loop + background history backfill
Syncs slash commands with Discord

Cog load order matters — log_analyzer's on_message (pattern matching) runs before docs_rag's (follow-up replies). Do not reorder without reviewing listener interactions.

Docker

docker compose up --build -d

Uses python:3.11-slim, persists data/ via volume mount, reads config from .env.

License

See repository license. Documentation sources retain their original licenses.

Name		Name	Last commit message	Last commit date
cogs		cogs
responses		responses
.env.example		.env.example
.gitignore		.gitignore
Dockerfile		Dockerfile
README.md		README.md
REVIEW.md		REVIEW.md
SETUP.md		SETUP.md
config.py		config.py
docker-compose.yml		docker-compose.yml
main.py		main.py
requirements.txt		requirements.txt

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QuillBot — Discord Bot for Minecraft Server Administration

Table of Contents

Features

Slash Commands

AI-Powered Commands

/ask <question> [image]

/chat <question> [image]

/analyze [log_link] [log_file] [image]

/spark <url>

/reindex [source] (Admin only)

Utility Commands

Passive Features

1. Paste Service Link Detection (log_analyzer)

2. File Attachment Handling (log_analyzer)

3. Known Error Pattern Matching (responses/errors.py)

4. Spark URL Detection (spark)

5. Reply-Based Follow-Up Conversations (docs_rag + commands)

6. @Mention Chat (commands)

7. Server History Indexing (history_rag)