# Advanced Usage

## Truncation Strategies

When content exceeds a target's token limit, Promptfire applies one of three strategies:

| Strategy | Behavior |
|----------|----------|
| **summarize-headers** | Keep headers, summarize content. Best for structure preservation. |
| **drop-sections** | Remove low-priority sections entirely. Keeps high-priority content complete. |
| **truncate** | Simple cut-off. Fast but loses structure. |

## Priority Order

Sections are prioritized during truncation (highest to lowest):

1. **VAULT.md** - Never truncated (highest priority)
2. **context** files - High priority
3. **conventions** - High priority
4. **structure** - Medium priority
5. **Active note** - Medium priority
6. **examples, templates** - Low priority (truncated first)

## XML Format (Claude Optimized)

When using XML format, files are wrapped in tags:

```xml
<context>
<file name="VAULT.md">
Your vault conventions here...
</file>

<file name="structure.md">
Your folder structure here...
</file>
</context>
```

This format is especially effective with Claude models, as they handle structured XML well within their context window.

## One-Click Context Copy

Output is formatted with clear separators and optional filename headers:

```markdown
# === VAULT.md ===

Your vault conventions here...

---

# === structure.md ===

Your folder structure here...
```