Struct CompactMetadata 

pub struct CompactMetadata {
    pub trigger: String,
    pub pre_tokens: u64,
    pub post_tokens: Option<u64>,
}

Compact boundary metadata

Marks natural conversation break points where context was compacted.

When Compaction Occurs

Claude Code automatically compacts conversation when:

• Token count reaches ~150k-160k tokens
• User manually triggers compaction

Usage for Segmentation

Compact boundaries are IDEAL for:

• Breaking long sessions into segments
• Creating segment summaries
• Understanding conversation phases

Example

{
  "trigger": "auto",
  "preTokens": 156594
}

Fields

trigger: String

Trigger type: “auto” or “manual”

• "auto" - Automatic compaction at ~150k tokens
• "manual" - User-triggered compaction

pre_tokens: u64

Token count before compaction

Typically ~150k-160k for auto-compaction

post_tokens: Option<u64>

Token count after compaction (optional)

Trait Implementations

impl Clone for CompactMetadata

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CompactMetadata

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CompactMetadata

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CompactMetadata

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.