Enum Agent 

pub enum Agent {
    Claude,
    Pi,
    Codex,
}

Which coding agent a session belongs to.

The registry is keyed by session_id alone. Claude Code’s ids are UUID v4, while pi.dev’s and Codex’s are both UUID v7, so the version nibble no longer separates every pair (#1907): single-key identity instead rests on v7’s 74 random bits, which make a pi/Codex collision improbable — not impossible, and not worth a re-key (ADR-0087). The tag lets a consumer tell the agents apart. Serialized snake_case; absent on the wire means Claude, so the Claude feeds (hooks, watcher, claude-wrap) send it by omission and stay byte-identical to senders that predate it (#1901).

A daemon built with an older variant set rejects an unknown value (unknown variant), so a newer sink’s observe is dropped until the daemon is upgraded — the sinks are fail-open, so that is silent.

Variants

Claude

Claude Code — every feed but the pi extension.

Pi

pi.dev’s coding agent, reported by the extension sessions install-hooks writes into ~/.pi/agent/extensions/.

Codex

OpenAI Codex (CLI, VS Code extension and Desktop), reported by sessions hook --agent codex from $CODEX_HOME/hooks.json (#1907).

Implementations

impl Agent

pub fn display_name(self) -> &'static str

The agent’s display name, for the tray and other human-facing labels.

pub fn is_claude(&self) -> bool

Whether this is the default agent, so ObserveRequest can omit it.

Trait Implementations

impl Clone for Agent

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Agent

impl Debug for Agent

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Agent

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Agent

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Agent

impl PartialEq for Agent

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Agent

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Agent