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case studies

shipped, scoped, and one decision i’m proud of each.

two projects. not three, not “many.” fewer means each one gets the case study it deserves.

wip · 2026

caduceus

label an issue. wake an agent. get a pull request.

a self-hosted rust daemon + hermes plugin. polls github for labeled issues, hands each one to a configurable ai harness in an isolated worktree, and finalizes the result as a branch + push + pr.

rusttokiogithub rest + webhookshermes pluginisolated git worktreesposix flock
read case study →repo
$ caduceus run --issue 42 --worker opencode~/projects
[caduceus] claim acquired        issue #42
[caduceus] worktree              /var/lib/caduceus/work/42
[caduceus] worker started        opencode  (pid 8741)
[caduceus] heartbeat             ok (12s)
[caduceus] worker exit 0         1 file changed, 24 insertions(+), 7 deletions(-)
[caduceus] branch pushed         refs/heads/caduceus/issue-42
[caduceus] pr opened             https://github.com/barkley-assistant/caduceus/pull/87
[caduceus] worktree cleaned      ok
[caduceus] state                 idle

live · 2026

signal house

engineering health, in one quiet dashboard.

a self-hosted dashboard that reads github, local git, and the agent session databases, and tells you whether work is actually moving — without opening five tabs.

bunreacttypescriptechartszustandbun:sqlite
read case study →repolive ↗
src/shared/math.ts~/projects
export function sum(values: ReadonlyArray<number | null>): number | null {
  let acc = 0;
  let seen = false;
  for (const v of values) {
    if (v !== null && Number.isFinite(v)) {
      acc += v;
      seen = true;
    }
  }
  return seen ? acc : null;   // unknown stays unknown
}