Crate spar 

spar: two coding agents alternate implementing and reviewing GitHub issues until a pull request converges.

A single model reviewing its own work grades its own homework. Two models with different training and different failure modes catch different things, and the disagreements are the useful part.

Re-exports

pub use error::Result;

pub use error::SparError;

Modules

agent

Driving one CLI.

cli

The command line.

config

Configuration, and the agent presets that make a new CLI a data change rather than a code change.

error

One error type. Every failure that a user could plausibly cause carries a sentence explaining what to do about it, because a failure whose reason is missing from the message costs more than the failure itself.

jsonx

Getting structured data back out of a model, and hashing it stably.

logging

Progress goes to stderr so stdout stays parseable. --quiet silences progress but never silences a warning or an error: those are exactly what quiet mode would otherwise bury.

model

The shapes that cross the boundary between spar and a model, and the shapes spar keeps for itself.

proc

Running external commands.

repo

git and gh. Every outbound string passes through the style and concision gates before it reaches GitHub.

review

Alternating custody until a PR converges.

review_only

Reviewing a pull request without touching it.

schema

JSON schemas for the three structured exchanges.

style

Two gates over every string spar sends to GitHub.

triage

Both agents judge every issue independently, then the two verdicts are reconciled mechanically.

Macros

bail

Return early with a SparError.

log

logdim

logwarn

spar_err

Build a SparError with format! syntax.