🎯 Use case
This file lives under “types/”, which covers shared TypeScript types and generated typings. On the API surface it exposes SessionId, AgentId, asSessionId, asAgentId, and toAgentId — mainly functions, hooks, or classes. What the file header says: Branded types for session and agent IDs. These prevent accidentally mixing up session IDs and agent IDs at compile time.
Generated from folder role, exports, dependency roots, and inline comments — not hand-reviewed for every path.
🧠 Inline summary
Branded types for session and agent IDs. These prevent accidentally mixing up session IDs and agent IDs at compile time.
📤 Exports (heuristic)
SessionIdAgentIdasSessionIdasAgentIdtoAgentId
🖥️ Source preview
/**
* Branded types for session and agent IDs.
* These prevent accidentally mixing up session IDs and agent IDs at compile time.
*/
/**
* A session ID uniquely identifies a Claude Code session.
* Returned by getSessionId().
*/
export type SessionId = string & { readonly __brand: 'SessionId' }
/**
* An agent ID uniquely identifies a subagent within a session.
* Returned by createAgentId().
* When present, indicates the context is a subagent (not the main session).
*/
export type AgentId = string & { readonly __brand: 'AgentId' }
/**
* Cast a raw string to SessionId.
* Use sparingly - prefer getSessionId() when possible.
*/
export function asSessionId(id: string): SessionId {
return id as SessionId
}
/**
* Cast a raw string to AgentId.
* Use sparingly - prefer createAgentId() when possible.
*/
export function asAgentId(id: string): AgentId {
return id as AgentId
}
const AGENT_ID_PATTERN = /^a(?:.+-)?[0-9a-f]{16}$/
/**
* Validate and brand a string as AgentId.
* Matches the format produced by createAgentId(): `a` + optional `<label>-` + 16 hex chars.
* Returns null if the string doesn't match (e.g. teammate names, team-addressing).
*/
export function toAgentId(s: string): AgentId | null {
return AGENT_ID_PATTERN.test(s) ? (s as AgentId) : null
}