Open source tools from ArchAstro

Developer tools built for engineers by engineers

Lean teams can get anything done... with the right tools.

Redline

Select text on a webpage, leave a precise fix, and pull it directly into your coding agent.

Maintained

macOS or Linux · Node.js 18+ · Chrome or Chromium · Bash · curl · jq · Windows, Safari, and Firefox are not yet supported

  1. 1
    Add the Redline coding-agent skillnpx skills add ArchAstro/redline
  2. 2
    Install the CLI package
    npm install -g @archastro/redline
  3. 3
    Configure and startredline setup --with-screenshotsredline startredline status
  4. 4
    Load the Chrome extension once

    Choose ~/.redline/extension/from Chrome's unpacked-extension screen.

  5. 5
    Leave a precise redline

    Select text on the page, click Redline, write the requested change, and submit.

  6. 6
    Pull it into your coding agent

    Ask your coding agent “Pull my redlines.” or run redline pull.

Data and permissions

The sidecar listens on loopback, authenticates the extension with a local capability token, and stores data under ~/.redline. Read the security model.

Leave the fix in the browser. Watch the coding agent pull it, edit source, and resolve it.Redline local build · captured July 2026

Scopey

Stop your agents from wandering off and wasting time and tokens! Scopey keeps Claude Code, Codex, Grok, Pi, and OpenCode sessions aligned with current user intent by watching activity and surfacing drift and corrections.

Maintained
brew install ArchAstro/tools/scopeyscopey setupscopey doctor
The authentic “You got scoped!” terminal moment from Scopey.Scopey CLI · authentic terminal output

gh-stacked

gh-stacked turns the commits on your feature branch into a stack of pull requests. Each commit maps to one PR, and each PR targets the previous PR in the stack so reviewers see small, incremental diffs instead of one large branch diff.

Maintained
gh extension install ArchAstro/gh-stackedgh stacked push --mode=previewgh stacked pushgh stacked status
Preview output lists commit-derived pull request actions, branches, and the base before anything is created.gh-stacked CLI · authentic preview output

Aster

Aster discovers projects across polyglot monorepos, connects dependency-aware targets, caches successful work, watches affected changes, and supervises local services in one terminal dashboard.

Internal build system

Email is optional. See our privacy policy.

Aster traces a change through the dependency graph and runs only the required builds and tests.Internal Aster build · captured July 2026

AstroDev

A custom coding harness built for fast iterations, loops, semi-supervised and headless agentic engineering.

Open-source candidate

Email is optional. See our privacy policy.

A deployed ArchAgent brings its identity and skills into a focused local coding loop.Internal AstroDev build · captured July 2026