II.
HookSurface overview
Reference · livehook-surface:claude.session-start
SessionStart (Claude) overview
Claude Code's SessionStart hook. Fires when a session begins or resumes. As of v2.1.152, hook output can request a same-session skill rescan with reloadSkills: true and can set hookSpecificOutput.sessionTitle.
Attributes
eventName
SessionStart (Claude)
displayName
SessionStart (Claude)
kind
native
originVendor
Anthropic
direction
event
blocking
false
family
shell-hook
payloadSchema
type
object
required
- hook_event_name
- source
properties
hook_event_name
type
string
const
SessionStart
source
type
string
enum
- startup
- resume
cwd
type
string
session_id
type
string
transcript_path
type
string
hookSpecificOutput
type
object
properties
sessionTitle
type
string
reloadSkills
type
boolean
description
Claude Code's SessionStart hook. Fires when a session begins or
resumes. As of v2.1.152, hook output can request a same-session skill
rescan with reloadSkills: true and can set hookSpecificOutput.sessionTitle.
Outgoing edges
emits_hook1
- agentVersion:claude:ge-0-0-0·AgentVersionClaude Code
Incoming edges
exposes1
- agent-runtime-impl:claude-code.runtime@1.x·AgentRuntimeImplClaude Code Runtime (1.x)
maps_hook1
- hook-mapping:claude-session-start-native·HookMapping