`session.end`

setting never mined JSON

A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

Two new lifecycle events, session.end and session.measure, added for plugins and hooks

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.275.

First seen — never in a mined build

Last seen — never in a mined build

Builds0 / 159on this box, as of v2.1.319

Written about v2.1.275 first named in a changelog, 17 Sep 2026

In the changelogs

Releases whose published page names session.end.

v2.1.281 23 Sep 2026
Hooks-module session.start and session.end lifecycle tweaks
Hook session.start now skips if it is no longer wanted after modules load, and session.end waits for its fallback under the timeout

found in this entry's text
v2.1.280 22 Sep 2026
New plugin-hookable event: session.send
Plugin hooks can now listen for a new session.send event, alongside session.receive/detach/end

found in this entry's text
v2.1.275 17 Sep 2026
New plugin/session lifecycle hook events session.end and session.measure
Two new lifecycle events, session.end and session.measure, added for plugins and hooks

named in this entry, found in this entry's text

First cited

The earliest release whose published evidence quoted session.end was v2.1.275, 17 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.

ReleaseDateThe span that was quoted

v2.1.27517 Sep 2026"session.measure": il, "session.end": sl,

Presence across releases

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.

Names beside it

Every settings key in the inventory starting session, up to twelve of them.

session v2.1.315
A per-session workshop document gets snapshotted with your session files and is only writable in plan mode.
session.attach never mined
Plugin hooks can now react to tool-call dry-runs, config changes, and session attach/detach events.
session.authorize never mined
Plugins gain $.session.authorize(), which mints an auth handle for the session.
session.compact never mined
A new session.compact plugin hook can intercept and rewrite conversation compaction
session.detach never mined
Plugin hooks can now react to tool-call dry-runs, config changes, and session attach/detach events.
session.measure never mined
Two new lifecycle events, session.end and session.measure, added for plugins and hooks
session.receive never mined
A new session.compact plugin hook can intercept and rewrite conversation compaction
session.root never mined
Plugin API policy list adds session.root, prompt.read, and ui.panes as permitted actions
session.send never mined
Plugin hooks can now listen for a new session.send event, alongside session.receive/detach/end
session.start never mined
Two hook events arrive: session.start fires on terminal session start, and prompt.context is registered but has no emitter here.
session.surfaces never mined
A new plugin hook event, session.surfaces (plural), joins the existing session.surface
session.turnCount never mined
Plugin API hook session.turnCount renamed to session.turns

Documentation pages 1

Mods referencementions itClaude Code CLI

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.