codex-vertical-workflows

codex-vertical-workflows is a skill for Claude Code, Codex from kitchen-engineer42/joharnessburg. It costs 74 tokens per session (354 once invoked), scanned A, original, MIT.

A workflow guide for running large, repeated John tasks with Codex subagents—separate agents that handle individual items—while recording their work in a durable ledger.

In plain words
What is it for?
Use it for per-chunk extraction, coverage checks, grounding, adjudication, per-entry generation, retries, reconciliation, cancellation, and other uniform fan-out tasks.
Why use it?
It makes high-volume work auditable and recoverable by checking receipts, events, retries, cancellations, and verification barriers before marking items complete.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions subagents; mentions Codex.

Part of the john plugin — 28 skills, 5 commands, 5 agents, 3 hooks shipped together

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.

agentmods
npx agentmods add skills/kitchen-engineer42/joharnessburg/codex-vertical-workflows
Any agent
npx skills add kitchen-engineer42/joharnessburg --skill codex-vertical-workflows
Clone the repo
git clone --depth 1 https://github.com/kitchen-engineer42/joharnessburg

Made for: Claude Code, Codex.

Or install john, the plugin that ships this one along with the rest of its 28 skills, 5 commands, 5 agents, 3 hooks.

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 codex-vertical-workflows

README.md
[![agentmods](https://agentmods.dev/badge/skills/kitchen-engineer42/joharnessburg/codex-vertical-workflows.svg)](https://agentmods.dev/skills/kitchen-engineer42/joharnessburg/codex-vertical-workflows)
Your own site
<a href="https://agentmods.dev/skills/kitchen-engineer42/joharnessburg/codex-vertical-workflows"><img src="https://agentmods.dev/badge/skills/kitchen-engineer42/joharnessburg/codex-vertical-workflows.svg" alt="Measured on agentmods" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 354 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00074 $0.00354
Opus 5 $0.00037 $0.00177
Sonnet 5 $0.00015 $0.00071
Haiku 4.5 $0.00007 $0.00035

Measured 6d ago against content hash 283c08099a04, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

codex-vertical-workflows 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 6d ago.

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.

plugins/joharnessburg/skills/codex-vertical-workflows/SKILL.md · 29 lines

What it actually says

Codex vertical workflows

Keep the phase contract provider-neutral: immutable indexed inputs, stable item IDs, typed receipts, unique events, audit barriers, and a verified checkpoint. Use john_run.py to create and reconcile the durable ledger before treating agent returns as completion.

  1. Create the run from a deterministic work CSV.
  2. Dispatch ordinary native subagents in bounded waves; default concurrency is 6 and workers remain leaves (max_depth=1).
  3. Use experimental spawn_agents_on_csv only when capability detection says it is available and the rows are uniform. Both engines consume the same manifest and receipt contract.
  4. Record every attempt receipt, then reconcile. A successful thread is not a completed item until its referenced events exist, parse, match run/item identity, and contain the required terminal event.
  5. Run extraction verification, coverage, grounding, adjudication, and typed reduction as separate stages with barriers. For extraction, invoke reduce_events.py --require-extraction-audits before phase advancement.

Use john_run.py status, retry-csv, and cancel for recovery. Never assign deterministic indexing to one agent, and never let parallel code workers edit the same files without disjoint ownership or an isolated worktree.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 29 lines · 74 tokens per session scan A 283c08099a04

Subscribe to this mod's changes

codex-vertical-workflows is a skill published in the GitHub repository kitchen-engineer42/joharnessburg (9 stars, last pushed 1mo ago), licensed MIT. It adds 74 tokens to every session and 354 once invoked, about $0.0004 per session on Opus 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 2026-08-31.

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