ow-build

ow-build is a skill for Claude Code, Codex from asfbay-bit/opchain-skills. It costs 171 tokens per session (3,143 once invoked), scanned A, original, Apache-2.0.

A guided workflow for managing a software build from signed scope through user acceptance testing, or UAT—the stage where a client checks that the result meets their needs. It records build state, updates, demos, change pricing, and invoice requests without sending invoices.

In plain words
What is it for?
Use it to start or resume a build, prepare weekly client updates, run demos, price requested changes, and exchange build specifications and results with a builder.
Why use it?
It keeps client work, approvals, changes, and handoffs organised without requiring the tool to write code or send payments.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: names the AskUserQuestion tool; mentions Claude Code.

Good fit Use it to start or resume a build, prepare weekly client updates, run demos, price requested changes, and exchange build specifications and results with a builder.

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Install with agentmods
npx agentmods add skills/asfbay-bit/opchain-skills/ow-build
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add asfbay-bit/opchain-skills --skill ow-build
Clone the repo
git clone --depth 1 https://github.com/asfbay-bit/opchain-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ow-build

README.md
[![agentmods](https://agentmods.dev/badge/skills/asfbay-bit/opchain-skills/ow-build/github.svg)](https://agentmods.dev/skills/asfbay-bit/opchain-skills/ow-build)
Your own site
<a href="https://agentmods.dev/skills/asfbay-bit/opchain-skills/ow-build"><img src="https://agentmods.dev/badge/skills/asfbay-bit/opchain-skills/ow-build/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ow-build

Your own site · 80×15
<a href="https://agentmods.dev/skills/asfbay-bit/opchain-skills/ow-build"><img src="https://agentmods.dev/badge/skills/asfbay-bit/opchain-skills/ow-build.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 171 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,143 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00171 $0.03143
Opus 5.5 $0.00068 $0.01257
Sonnet 5.5 $0.00034 $0.00629
Haiku 4.5 $0.00017 $0.00314

Measured today against content hash e02e9890b6e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ow-build scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills-work/ow-build/SKILL.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ow-build: the build, from signing to ready for UAT

ow-build 2.0.1 · protocol 2 · Core bundle

Open references/ow-protocol.md first and keep to it. If you cannot open it, say so and stop.

Asking the user: every question and approval goes through AskUserQuestion, batched into one call per verb with your recommendation first; never a question or numbered menu typed into chat (references/ow-protocol.md §1).

It writes no code: it runs the client side of the build. With a builder in the opchain project format it hands over the signed scope as spec/ files, gives you the builder's lines, and reads the builder's results back as data.

Welcome (first run: no opchain-work/builds/)

I run the client side of a signed build: your builder one sprint at a time, the weekly update, each demo. Changes are priced from your price book and start only once the client has agreed them in writing. I write invoice requests; I send nothing.

Try: "start the build for plans/acme/" · "write this week's update for Acme" · "price this change for Acme"

Questions, approvals and re-runs

  • At most three questions per verb, in one AskUserQuestion call, and only for what the CRM, or in the fallback plan.yaml, quote.md, build-request.md, ledger.md and build.yaml, does not already answer (the update day, the client's project folder, which milestone's demo the working-demo payment follows, a demo date, your hour value for the margin view). Anything else: say what you assumed and carry on.
  • One approval: before a change order goes to the client, and before an agreement, a signature or a payment is recorded. Nothing here sends anything; you send it.
  • Re-runs are normal. A sprint may be run again, an update rewritten, a demo re-scripted. Say what is there and what will change. A version a person edited in the CRM is never overwritten: write yours beside it and say so. Two things never move: a payment the ledger shows requested or paid, and a change order's price once it is sent (a different price is a new change order).

Read the full file on GitHub · 140 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today Changed · -102 lines e02e9890b6e9
  2. 5d ago First seen · 242 lines · 171 tokens per session scan A 22082eca36e6

Subscribe to this mod's changes

ow-build is a skill published in the GitHub repository asfbay-bit/opchain-skills (0 stars, last pushed today), licensed Apache-2.0. It adds 171 tokens to every session and 3,143 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-30.

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