thrds 0.1.2

Declarative thread sync for Slack, Discord, and Bluesky

thrds

Declarative thread sync for Slack, Discord, and Bluesky.

Given a desired thread state (list of message contents), diffs against existing messages and applies minimal edits/posts/deletes to converge.

Install

pip install thrds            # Core only (zero deps)
pip install thrds[bsky]      # + Bluesky (atproto)

Slack and Discord clients use only stdlib (urllib) and curl subprocess respectively — no extra deps needed.

Usage

from thrds import SlackClient, Thread

slack = SlackClient(token="xoxb-...", channel="C0AQC2VKEJF")
thread = Thread(messages=["OP text", "Reply 1", "Reply 2"])

# Create new thread
result = slack.sync(thread)

# Update existing thread (edits changed messages, appends new, deletes extras)
result = slack.sync(thread, thread_ts="1775516040.743629")

Discord

from thrds import DiscordClient, Thread

discord = DiscordClient(token="your-bot-token", channel_id="1489279547689140505")
thread = Thread(messages=["OP text", "Reply 1", "Reply 2"])
result = discord.sync(thread, thread_id="1490821926288097503")

Bluesky

from thrds import BskyClient, Thread

bsky = BskyClient(handle="you.bsky.social", password="app-password")
thread = Thread(messages=["Root post", "Reply 1"])
result = bsky.sync(thread)

Bluesky doesn't support editing posts — the sync algorithm automatically falls back to delete+repost when content changes.

Dry run

result = slack.sync(thread, thread_ts="...", dry_run=True)
for action in result.actions:
    print(action.type, action.index, action.content)

Sync algorithm

Given desired messages M and existing thread messages N:

1. Delete extras from the end (backwards — replies before OP)
2. Edit overlapping messages where content changed (skip unchanged)
3. Post new messages at the end

This ensures minimal API calls, preserved ordering, and no orphaned thread parents.

Features

• Rate limit handling: Slack 429 retry with Retry-After, configurable pacing between API calls
• Edit rate limit fallback: Discord's 30046 error (edit limit on old messages) triggers automatic delete+repost
• Unfurl suppression: Slack link previews suppressed by default
• Discord system message filtering: Thread starter messages filtered from list_messages
• Bot token prefix: Discord Bot prefix auto-prepended
• Metadata support: Slack message metadata passthrough

Used by

• hudcostreets/nj-crashes — Slack crash-notification threads (SlackClient.sync())
• Open-Athena/marin-discord — Discord summary threads (DiscordClient.sync())

API

SyncResult

@dataclass
class SyncResult:
    thread_id: str          # thread_ts (Slack), thread channel ID (Discord), AT URI (Bluesky)
    message_ids: list[str]  # Per-message IDs
    actions: list[Action]   # What was done: Edit, Post, Delete, Skip

SyncOptions

Option	Default	Description
dry_run	False	Print actions without executing
pace	0.0	Seconds between mutating API calls
suppress_embeds	False	Discord: suppress link previews
suppress_unfurls	True	Slack: suppress link previews