MarkdownV2 is Telegram's rich-text formatting syntax for messages, supporting bold, italic, links, inline code, and more. Posts published through the Bot API can use it to render styled text in a channel. Autogram produces correctly-escaped MarkdownV2 so generated posts keep their formatting without breaking on special characters.
Telegram’s original Markdown mode was ambiguous about where formatting started and stopped, which made some messages impossible to express unambiguously. MarkdownV2 resolved that by requiring a much stricter escaping discipline. The cost of the added precision is that it is far less forgiving of text that was not written with it in mind.
MarkdownV2 reserves a long list of characters — among them the underscore, hyphen, period, parenthesis and exclamation mark — and any of them appearing literally must be escaped with a backslash. A post ending in an ordinary sentence with a period will be rejected outright if that period is unescaped, which is why hand-written MarkdownV2 fails so often.
AI-drafted copy is full of exactly the characters MarkdownV2 reserves: em dashes, parentheses, decimal points, underscores in URLs. Escaping has to happen after the text is written and before it is sent, applied to the literal characters but not to the markup you actually intended — which is precisely the step Autogram handles so a generated post keeps its formatting instead of failing to send.
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