> ## Documentation Index
> Fetch the complete documentation index at: https://docs.devin.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# CognitionAcp.SidechainsSupportMeta

> — client capability flag indicating that the client renders sidechain threads and wants the proxy to deliver sidechain rows () over .

`cognition.ai/sidechains` — client capability flag indicating that the
client renders sidechain threads and wants the proxy to deliver sidechain
rows (`_meta["cognition.ai/sidechain"]`) over `session/update`.

The agent only advertises \[`crate::AgentCapabilitiesMeta::sidechains`] and
emits sidechain rows when the client sets this flag; clients that do not
opt in keep today's behaviour (sidechain events stay hidden).

```typescript
type SidechainsSupportMeta = void
```


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