Files
claudetools/projects/discord-bot/bot/handlers/message_handler.py
Mike Swanson 2efd4a4fb3 discord-bot: fix "no response", serialize turns, attribution, mentions, post-at-bottom
client.py: send() falls back to ResultMessage.result when no TextBlock streams
(the "(no response)" bug) and reconnects+retries once on a closed SDK session.

message_handler.py: per-thread turn lock so messages arriving mid-turn or from a
second user queue in order (nothing dropped); per-session requester-attribution
env (discord_id -> users.json key), pinned to the thread opener; _USER_MAP caches
only on a successful load; final answer posts as a fresh message at the BOTTOM
(no edit-in-place); a <@id> tag goes out as a fresh send so it actually pings.

main.py: allowed_mentions permits user pings, blocks @everyone/@here/roles.

DISCORD_CLAUDE.md: no thread auto-delete; tiered close-out (Q&A -> one-line rolling
log, substantive -> /save); @mention guidance; opener-pinned attribution note.

whoami-block.sh / sync.sh: bot-context attribution (Executed by ClaudeTools Bot /
Requested by <person>; git author = mapped requester, committer = bot). Strict
no-op for interactive sessions.

users.json: discord_id for Mike/Howard; added Winter Williams (bot-only, full trust).

Reviewed by Code Review Agent + Grok + Gemini (Gemini's "malformed email" finding
verified as a false positive).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-08 21:00:34 -07:00

277 lines
11 KiB
Python

"""Discord message handler. Maps each thread to a persistent Claude Agent session."""
from __future__ import annotations
import asyncio
import json
import logging
import shutil
from pathlib import Path
import discord
from bot.claude.client import ClaudeAgentManager
from bot.config import settings
logger = logging.getLogger(__name__)
DISCORD_MAX_LEN = 2000
EDIT_THROTTLE_SECONDS = 0.75
MAX_FILE_BYTES = 25 * 1024 * 1024
MAX_TURN_BYTES = 100 * 1024 * 1024
ATTACHMENT_ROOT = settings.claudetools_root / "projects" / "discord-bot" / ".attachments"
class MessageHandler:
_USER_MAP: dict[str, dict] | None = None
def __init__(self, bot: discord.Client, agents: ClaudeAgentManager) -> None:
self.bot = bot
self.agents = agents
# One lock per thread serializes turns: a message that arrives while the
# bot is mid-turn (or a second user chiming in) waits and is processed
# next, in order — nothing collides on the single SDK session, nothing
# is dropped. Different threads still run concurrently (separate locks).
self._thread_locks: dict[int, asyncio.Lock] = {}
@classmethod
def _users(cls) -> dict[str, dict]:
"""discord_id -> {user, full_name} map from .claude/users.json (cached)."""
if cls._USER_MAP is None:
mapping: dict[str, dict] = {}
try:
p = settings.claudetools_root / ".claude" / "users.json"
data = json.loads(p.read_text(encoding="utf-8"))
for key, u in (data.get("users") or {}).items():
did = str(u.get("discord_id") or "").strip()
if did:
mapping[did] = {"user": key, "full_name": u.get("full_name", key)}
cls._USER_MAP = mapping # cache only on a successful load
except Exception as e: # noqa: BLE001
logger.warning("[WARNING] could not load users.json discord map: %s", e)
return mapping # do NOT cache a failed/empty load — retry next call
return cls._USER_MAP
def _requester_env(self, author: discord.abc.User) -> dict[str, str]:
"""Per-session attribution env: marks the bot as executor and the Discord
requester (mapped to a known user key when their discord_id is on file)."""
mapped = self._users().get(str(author.id))
display = getattr(author, "display_name", author.name)
if mapped:
label = f"{mapped['full_name']} (@{author.name}, via Discord)"
user_key = mapped["user"]
else:
label = f"@{author.name} (display: {display}, via Discord)"
user_key = ""
return {
"CLAUDETOOLS_ACTOR": "discord-bot",
"CLAUDETOOLS_REQUESTER": label,
"CLAUDETOOLS_REQUESTER_USER": user_key,
}
async def handle_mention(self, message: discord.Message) -> None:
if message.author == self.bot.user:
return
# Strip the bot mention to get the raw user text.
user_text = message.content
for mention in message.mentions:
if mention == self.bot.user:
user_text = user_text.replace(f"<@{mention.id}>", "").replace(
f"<@!{mention.id}>", ""
).strip()
if not user_text and not message.attachments:
await message.reply("Hey! How can I help?")
return
# Resolve or create the thread first so we can include its ID in context.
if isinstance(message.channel, discord.Thread):
thread = message.channel
else:
name = self._thread_name(user_text) if user_text else "Attachment"
thread = await message.create_thread(
name=name,
auto_archive_duration=1440,
)
# Build caller-identity header so the agent always knows who is asking.
# Thread ID is included so the agent can delete the thread on completion.
author = message.author
display = getattr(author, "display_name", author.name)
guild_name = message.guild.name if message.guild else "DM"
channel_name = getattr(message.channel, "name", "unknown")
discord_ctx = (
"[DISCORD_CONTEXT]\n"
f"User: @{author.name}"
+ (f" (display: {display})" if display != author.name else "")
+ f" | ID: {author.id}\n"
f"Channel: #{channel_name} | Thread ID: {thread.id} | Guild: {guild_name}\n"
"[/DISCORD_CONTEXT]\n\n"
)
content = (discord_ctx + user_text).strip()
attachment_paths = await self._download_attachments(message, thread.id)
if attachment_paths:
lines = "\n".join(f"- {p}" for p in attachment_paths)
content = (content + f"\n\nUser attached files:\n{lines}").strip()
if not content:
content = "User uploaded file(s) without a message."
# Attribution pins to the THREAD OPENER: this env is honored only when the
# thread's SDK session is first created and is reused for every later turn.
# If a second person posts in the same thread, the work is still credited
# to whoever opened it (a thread = one person's request — see DISCORD_CLAUDE.md).
req_env = self._requester_env(author)
await self._run_turn(thread, content, req_env)
@staticmethod
async def _download_attachments(
message: discord.Message, thread_id: int
) -> list[Path]:
if not message.attachments:
return []
target_dir = ATTACHMENT_ROOT / str(thread_id)
target_dir.mkdir(parents=True, exist_ok=True)
saved: list[Path] = []
running_total = 0
for att in message.attachments:
if att.size > MAX_FILE_BYTES:
logger.warning(
"[WARNING] skipping %s: %d bytes exceeds per-file cap %d",
att.filename, att.size, MAX_FILE_BYTES,
)
continue
if running_total + att.size > MAX_TURN_BYTES:
logger.warning(
"[WARNING] skipping %s: would exceed per-turn cap %d",
att.filename, MAX_TURN_BYTES,
)
continue
safe_name = Path(att.filename).name or f"attachment_{att.id}"
target = target_dir / safe_name
try:
await att.save(target)
except discord.HTTPException as e:
logger.warning("[WARNING] failed to download %s: %s", att.filename, e)
continue
saved.append(target)
running_total += att.size
logger.info("[INFO] saved attachment %s (%d bytes)", target, att.size)
return saved
@staticmethod
def _cleanup_attachments(thread_id: int) -> None:
target_dir = ATTACHMENT_ROOT / str(thread_id)
if target_dir.exists():
try:
shutil.rmtree(target_dir)
except OSError as e:
logger.warning("[WARNING] attachment cleanup failed for %d: %s", thread_id, e)
@staticmethod
def _thread_name(message: str) -> str:
name = message[:50].replace("\n", " ").strip()
if len(message) > 50:
name += "..."
return name or "ClaudeTools Conversation"
async def _run_turn(
self,
thread: discord.Thread,
user_message: str,
env: dict[str, str] | None = None,
) -> None:
# The Claude Code CLI cold-start can take a few seconds; show feedback.
# (Shown immediately; queued turns sit here while an earlier turn runs.)
status_msg = await thread.send("[INFO] Thinking...")
buffer: list[str] = []
last_edit = 0.0
lock = asyncio.Lock()
async def on_text(chunk: str) -> None:
nonlocal last_edit
buffer.append(chunk)
now = asyncio.get_event_loop().time()
if now - last_edit < EDIT_THROTTLE_SECONDS:
return
async with lock:
last_edit = asyncio.get_event_loop().time()
preview = "".join(buffer)
if len(preview) > DISCORD_MAX_LEN:
preview = preview[-DISCORD_MAX_LEN:]
try:
await status_msg.edit(content=preview or "[INFO] Thinking...")
except discord.errors.NotFound:
pass
async def on_tool_use(tool_name: str) -> None:
# Server-side log only — Discord-side notices clutter the thread
# and ordering issues push them below the streaming answer.
logger.info("[INFO] thread=%d tool=%s", thread.id, tool_name)
try:
# Serialize turns within this thread: a message that lands while a
# turn is in flight (or a second user chiming in) waits here and runs
# next, in order — nothing collides on the single SDK session, nothing
# is dropped. Separate threads still run concurrently.
turn_lock = self._thread_locks.setdefault(thread.id, asyncio.Lock())
async with turn_lock:
agent = await self.agents.get_or_create(thread.id, env=env)
full_text = await agent.send(user_message, on_text, on_tool_use)
except Exception as e:
logger.exception("[ERROR] Agent turn failed in thread %d", thread.id)
await status_msg.edit(content=f"[ERROR] {e}")
self._cleanup_attachments(thread.id)
return
await self._post_final(status_msg, thread, full_text or "[INFO] (no response)")
self._cleanup_attachments(thread.id)
async def _post_final(
self,
status_msg: discord.Message,
thread: discord.Thread,
text: str,
) -> None:
chunks = self._split(text)
# Deliver the finished answer as NEW message(s) at the BOTTOM of the
# thread, like a normal human reply — do NOT edit the in-place
# "Thinking..." preview into the answer. The live edit is good for showing
# progress while working; the final answer belongs at the bottom where the
# next person expects it. (A fresh send is also what makes any <@id>
# mention actually notify the user — edits do not ping.)
try:
await status_msg.delete()
except discord.errors.HTTPException:
pass
for chunk in chunks:
await thread.send(chunk)
@staticmethod
def _split(content: str, max_len: int = DISCORD_MAX_LEN) -> list[str]:
if len(content) <= max_len:
return [content]
chunks: list[str] = []
current = ""
for line in content.split("\n"):
# A single line longer than the limit must be hard-split mid-line.
while len(line) > max_len:
if current:
chunks.append(current.rstrip())
current = ""
chunks.append(line[:max_len])
line = line[max_len:]
if len(current) + len(line) + 1 > max_len:
chunks.append(current.rstrip())
current = line + "\n"
else:
current += line + "\n"
if current:
chunks.append(current.rstrip())
return chunks