Enum ResumeGate 

pub(crate) enum ResumeGate {
    Allow,
    Redirect {
        head: String,
    },
    Refuse {
        head: String,
    },
    Relocate {
        head: String,
        from_config_dir: String,
    },
    Fork {
        head: String,
    },
    ForkFrom {
        head: String,
        from_config_dir: String,
        from_cwd: String,
    },
}

What the resume gate decided for a session a spawn is about to --resume (SPEC_RESUME_GATE_AND_SAME_IDENTITY_CONTINUATION_2026_09_25.md §4.2).

Variants

Allow

Resume the candidate: it is the chain head, or the chain can’t say otherwise.

Redirect

The conversation moved on to head, reachable here: resume that.

Fields

head: String

Refuse

The conversation moved on to head, which this spawn can’t reach: resume nothing, so the spawn starts fresh and carries the record.

Fields

head: String

Relocate

head lives under another login of the same identity, readable at from_config_dir: copy it in and resume it with --fork-session (spec §4.3).

Fields

head: String

from_config_dir: String

Fork

head is reachable here, but its file grew after AgentMux last saw it: the conversation continued outside AgentMux. Resume it with --fork-session, so that branch is never appended to by a second writer (spec §4.4, H4).

Fields

head: String

ForkFrom

This agent has no conversation of its own yet, and the agent it was forked from is at the candidate (GateInput::fork_source): copy that session in from from_config_dir / from_cwd (a fork works in its own directory, so the CLI can’t find it there) and resume it with --fork-session, so the fork starts from its parent’s conversation and never writes to it (the fork-isolation report in #4744, F5).

Fields

head: String

from_config_dir: String

from_cwd: String

Trait Implementations

impl Clone for ResumeGate

fn clone(&self) -> ResumeGate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResumeGate

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

Formats the value using the given formatter.

impl Eq for ResumeGate

impl PartialEq for ResumeGate

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ResumeGate