> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tylon.app/llms.txt
> Use this file to discover all available pages before exploring further.
# The trunk
> One line through the month: what landed, what was promised and has not, and the five numbers that say whether the board is moving.
The board says what is in flight. The trunk says what actually landed, on
which day, and it reads a month at a time.
## The line
`HEAD → refs/heads/main` at the top is what the line is: the branch this
project promotes into, not an abstraction over it.
A card that reached the last stage of its flow, on the day it got there.
A card that is promised inside this window and has not gone out. One in the
shot, still on the board in **In development**.
Solid where the work is done, dashed where the month has not happened yet.
The dash is not a forecast; it is the part of August that is still in front
of the team.
The filled square is a **release that closed**. `Wallets, first half`, with
the cards it carried listed under *On the trunk* beneath it.
## The five numbers
```
4 went out 1 promised, not out 28.6 days to land
1 promotion refused 0 reverts opened
```
Each one is a sentence about the same window, and each says how it was
counted — because a delivery metric nobody can reproduce is a delivery metric
somebody will argue with.
**28.6 days to land** is the middle card, from the day it left Backlog to the
day it landed. Read from 4 cards: the ones with no move out of the backlog
have nothing to date them from, and are left out rather than counted as zero.
**1 promotion refused** is a move the provider would not take. **0 reverts
opened** is a revert pull request from a card that had already landed — the
number that says whether what went out stayed out.
The arrows at the top right walk back through previous months, and the same
window is available to a script at
[`GET /v1/trunk`](/en/api-reference/endpoints/trunk).