Koog 1.0 idioms, gotchas, and scaffolding skills for Kotlin agents on the JVM
86
88%
Does it follow best practices?
Impact
86%
1.86xAverage score across 45 eval scenarios
Advisory
Suggest reviewing before use
A developer has a Koog 1.0 agent that helps customer-support staff look up account information. They want the agent to call into their existing account-lookup logic — a suspend fun queryAccount(req: AccountLookupRequest): AccountLookupResult that lives in their project today and is also consumed by other (non-agent) code paths.
The function's signature is fixed by those other consumers:
@Serializable
data class AccountLookupRequest(
val accountId: String,
val region: String,
val includeArchived: Boolean,
)
@Serializable
data class AccountLookupResult(
val displayName: String,
val tier: String,
val openTickets: Int,
val lastSeenIso: String,
)
suspend fun queryAccount(req: AccountLookupRequest): AccountLookupResultMake queryAccount callable by the agent.
Walk through how to expose this query to the agent. Produce the modified or new source files in a single response, with each file labeled.
evals
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skills
add-observability
add-persistence
add-rag
add-structured-output
add-token-budgeting
add-tool
cache-llm-calls
define-prompt
domain-model-subtask-pipeline
references
enable-prompt-caching
handle-agent-events
manage-state
migrate-from-0-x
model-planner-subtasks
persist-chat-history
query-sql-from-agent
scaffold-agent
snapshot-and-restore
test-koog-agents
trace-agent-internals
use-attachments
use-functional-agent
use-llm-node-variants
use-planner
wire-a2a
wire-acp-server
wire-ktor-server
wire-mcp-server
wire-spring-boot