> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/llms.txt.
> For full documentation content, see https://docs.nvidia.com/nemo/relay/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Struct Cache Diagnostics Tracker

> Runtime-local miss diagnosis tracker.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-ffi`.

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Runtime-local miss diagnosis tracker.

## Fields

### `last_seen_by_prefix: HashMap<(String, String, String), DateTime<Utc>>`

Last time a specific stable prefix hash was observed for an agent/provider pair.

### `last_exemplar_by_agent: HashMap<(String, String), Vec<(String, u32, String)>>`

Last retained stable prefix exemplar for an agent/provider pair.

## Trait Implementations

### `impl Debug for CacheDiagnosticsTracker`

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#### `fmt`

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### `impl Default for CacheDiagnosticsTracker`

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#### `default`

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