Skills Development AI Agent Harness Scaffolder

AI Agent Harness Scaffolder

v20261108
harness-mint
Scaffolds a new standalone AI agent harness via metaharness new, with templates and host presets. Dry-run by default, requires --confirm to write, and refuses to write inside the calling repo.
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Overview

The one write-capable skill in the plugin. Every other skill is
pure-read. This one calls metaharness new, which writes a new
directory tree.

Safety (load-bearing)

  1. Dry-run by default. Without --confirm, the script prints what

it would do and exits 0 without touching disk.

  1. Refuses project root. If --target resolves to the current

working directory OR any path inside it, the script errors out with
exit 2. Target must be an absolute path OUTSIDE the calling repo
(default is a fresh /tmp/ruflo-mint-<ts>-<name>/ dir).

  1. Refuses existing target. Won't overwrite — must scaffold into a

non-existent dir.

  1. Subprocess + 60s timeout. No library import, no in-process

execution. The mint stays sandboxed from ruflo's runtime.

Algorithm

Implementation: scripts/mint.mjs.

  1. Validate --name, --template. Default --host to claude-code.
  2. Resolve --target (default: temp dir).
  3. Run safety checks (no project-root writes; target must not exist).
  4. Without --confirm: emit dry-run plan, exit 0.
  5. With --confirm: shell `npx metaharness new --template

--host --target --yes`.

Templates

minimal, vertical:coding, vertical:devops, vertical:support,
vertical:legal, vertical:research, vertical:trading, vertical:health,
vertical:education, vertical:sales, vertical:business,
vertical:crm, vertical:marketing, vertical:advertising,
vertical:ai, vertical:agentics, vertical:ruview, vertical:gaming,
vertical:repo-maintainer, vertical:exotic.

Hosts

claude-code, codex, pi-dev, hermes, openclaw, rvm,
copilot, opencode, github-actions.

Example dry-run

$ node scripts/mint.mjs --name my-harness --template vertical:coding --host claude-code
# harness-mint (dry-run)

- action: metaharness new
- name: my-harness
- template: vertical:coding
- host: claude-code
- target: /tmp/ruflo-mint-1718560000-my-harness
- confirm: false
- willWrite: false

Re-run with `--confirm` to actually scaffold.

Why dry-run by default

Ruflo's behavioral rules say "executing actions with care" — destructive
or repo-touching actions need confirmation. The dry-run output makes the
WHAT visible before the WHEN. A human sees target, decides, then
adds --confirm if happy.

Info
Category Development
Name harness-mint
Version v20261108
Size 2.77KB
Updated At 2026-11-11
Language