# Context (/context)



The context is everything the model reads before it answers: the system prompt, your project's instructions, the
tools, and the whole conversation so far. It has a limit, the context window. A long conversation fills it.

## See what fills the context [#see-what-fills-the-context]

`/context` shows the context window as a grid, a square per percent, by what fills it:

```text
+- Context Opus 5.5 · 41.0k of 200.0k tokens · 21% ----------------------------------------+
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■   ■ System prompt       6.2k tokens · 3%                             |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■   ■ System tools        14.8k tokens · 7%                            |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■   ■ Skills              1.9k tokens · 0.9%                           |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■   ■ Messages            18.1k tokens · 9%                            |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■   ■ Free space          126.0k tokens · 63%                          |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■   ■ Autocompact buffer  33.0k tokens · 17%                           |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■                                                                      |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■                                                                      |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■                                                                      |
| ■ ■ ■ ■ ■ ■ ■ ■ ■ ■                                                                      |
|                                                                                          |
| Compacts on its own at 167.0k tokens (84%); /compact does it now, with a focus if you g… |
| Listed by name and loaded when used, so they take no room yet: MCP tools 52.0k           |
+------------------------------------------------------------------------------------------+
| Esc close                                                                                |
+------------------------------------------------------------------------------------------+
```

## Compact a long conversation [#compact-a-long-conversation]

A long conversation fills the model's context. `/compact` summarizes it so far and carries on from the summary. Name
what matters most and it is kept above all:

```text
/compact the API changes
```

Jinion also compacts on its own as the context fills. When a fifth or less is left before that, the rule under the
prompt says how much, such as `15% context left until auto-compact · /compact`. After compacting, the conversation marks
where, such as `[x] Compacted · 160.2k → 21.4k tokens`. Click it to see the summary.