Slack uses emoji names (no colons needed when calling the API):
grinning, smile, blush, sunglasses, wink, cry, rage, heart_eyes, sweat_smile,
thinking_face, sleeping, scream, +1, -1, clap, raised_hands, handshake, pray, v,
hand, heart, broken_heart, 100, fire, star, star2, muscle, tada, eyes, brain, zap,
The reaction endpoint (POST /api/send/reaction) is currently hardcoded to only support Slack. When attempting to add a reaction to a Telegram message, it fails with "channel_not_found" because it passes Telegram chat IDs to Slack's API.
channelId, timestamp, emoji, respondingToIds
Addressing the ranking: Why Signal > iMessage > Telegram, not Telegram > Apple > Signal
The Consensus Among Security Experts:
Response to Austin's question: Do Signal, Telegram, and iMessage ACTUALLY provide security against determined adversaries?
Short answer: These platforms ARE secure against most threats, but NOT against the specific threat you're worried about (nation-state actors with legal/extralegal power).
Explaining Bostrom's "Vulnerable World Hypothesis" to Austin
The Vulnerable World Hypothesis is one of Bostrom's most unsettling ideas: What if technological progress inevitably gives us the tools to destroy ourselves, and the default outcome is extinction?
Imagine humanity is drawing balls from an "urn of technological discoveries." We've pulled out good balls (medicine, agriculture, computers) and some dangerous ones (nuclear weapons, bioweapons). But what if there's a "black ball" still in there - a technology so dangerous that once discovered, default human behavior leads to civilizational collapse?