# Thread-opener boilerplate

Part of [The AI Tells Index](https://feedsquad.com/ai-tells). A tell signals low effort. It does not identify an author. Skilled writers produce every shape listed here, some of them daily, and automated detectors misread those writers for it at rates measured above 60 percent on non-native English prose. Nothing in this index proves that a machine wrote anything. Read an entry as one piece of evidence to weigh against the false-positive notes printed beside it.

## Facts

- Id: thread-opener-boilerplate
- Category: Platform-specific (platform)
- Subcategory: opener
- Also known as: A thread, Bookmark this, Here's everything I learned
- Status: Burned. So widely publicised that human writers now trip it too, or vendors removed it. Signal value has collapsed. Kept because retired signal is information.
- Severity: low
- Evidence grade: feedsquad-observed (our own corpus only, no external attestation)
- Languages: en
- Added: 2026-08-15
- Updated: 2026-08-15
- Page: https://feedsquad.com/ai-tells/thread-opener-boilerplate

## Description

The stock openers of the 2019 to 2022 thread era: the bare thread announcement, the instruction to bookmark, the promise of everything learned. They were so widely copied, then so widely mocked, that they now read as self-parody wherever they appear.

## Why it reads as machine-written

It barely does any more, and that is the entry. Published tells decay: the measured case is the collapse of a famous vocabulary marker in academic writing shortly after people started pointing at it, while unpublicised markers kept rising. These openers went through the same cycle faster, because the audience that used them is the audience that reads threads about threads. A directory that publishes a tell shortens its life, which is a cost worth stating out loud.

## Detection

Type: deterministic (a regular expression, run as written)

Scope: document

ECMAScript regular expression. The build validator compiles it and tests it against this entry's own specimens.

```regex
^[ \t]*(?:a thread[ \t]*(?:\u{1F9F5})?[ \t]*[:.]?[ \t]*$|\u{1F9F5}[ \t]*a thread\b|here'?s everything i (?:learned|know) about\b|bookmark this[ \t]*(?:post|thread|one)?[ \t]*[.!]?[ \t]*$|i (?:spent|read) \d{1,4} (?:hours|days|years|books|papers)[^\n]{0,40}so you don'?t have to\b)
```

Flags: imu

## Examples

Constructed specimens. Written for this index. Never quoted from anyone's posts.

### Specimen 1

Before, exhibiting the tell:

> Here's everything I learned about pricing in five years.
>
> Bookmark this.

After, repaired:

> Five years of pricing work, one thing that mattered: moving from per-seat to per-workspace in 2024 took net revenue retention from 96 to 114 percent. The migration ran four months and cost us two enterprise accounts who preferred the old model.

Note: Figures in this repair are invented for the specimen.

## False positives

Who legitimately writes this way.

The growth-Twitter cohort of 2019 to 2022 wrote these by hand and taught them in threads about writing threads, so the openers are a generational marker rather than a production marker. People still use them straight, especially outside English-first tech circles where the mockery never arrived. The reviewer check is redundant here: a burned tell should change nobody's mind about anything, which is why this one is de-armed.

## Model attribution

No family attribution. Vendors do not document these openers, and the decay appears to owe more to social mockery than to any training change.

## Sources

1. FeedSquad draft review, X and LinkedIn thread openers (FeedSquad observation)
   Corpus: Thread openers in drafts produced by FeedSquad writing agents, X and LinkedIn surfaces, 2026. Recorded as an absence: the stock openers appeared rarely and were flagged by reviewers as dated when they did. Graded on our own corpus because no external measurement of this decay exists.
   Observed 2026-08-15

## Status history

Ids are permanent. A retired tell keeps its id and its page.

- 2026-08-15, Burned: These openers are so publicised that human writers now use them ironically and assistants have largely stopped producing them unprompted. Signal value has collapsed. The entry stays in the dataset because retired signal is information, and burned status de-arms the rule so it does not fire.

## License

CC BY 4.0. https://creativecommons.org/licenses/by/4.0/

Attribution: The AI Tells Index, feedsquad.com/ai-tells

Reuse the data, including commercially. Keep the attribution line.

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Dataset version 1.0.0. Schema version 1.
Part of [FeedSquad](https://feedsquad.com). Built by [Herman Foundry](https://hermanfoundry.com) from Levi, Finnish Lapland.