Interface: SystemContentBlock
Defined in: packages/agentos/src/api/generateText.ts:400
A structured block of system prompt content with optional cache breakpoint.
When cacheBreakpoint is true, providers that support prompt caching
(e.g., Anthropic) will mark this block's boundary for caching.
Properties
cacheBreakpoint?
optionalcacheBreakpoint:boolean
Defined in: packages/agentos/src/api/generateText.ts:404
When true, marks the end of this block as a cache boundary.
cacheTtl?
optionalcacheTtl:"5m"|"1h"
Defined in: packages/agentos/src/api/generateText.ts:414
Cache time-to-live for this breakpoint. Defaults to the provider's
standard 5-minute ephemeral cache. Set '1h' for the 1-hour cache —
worth the higher write premium (2x base input vs 1.25x) on a stable
prefix that is re-sent on a slow, human-paced cadence (per-turn narrator
/ companion calls minutes apart), where the 5-minute cache would expire
between turns and never produce reads. Only meaningful with
cacheBreakpoint: true.
text
text:
string
Defined in: packages/agentos/src/api/generateText.ts:402
The text content of this block.