choose-engineering-flow

choose-engineering-flow is a skill for Codex from Phelan164/codex-howto. It costs 58 tokens per session (468 once invoked), scanned A, original, MIT.

A routing guide that chooses the most suitable engineering workflow from the repository’s existing skills. It recommends which skill to use but does not perform the engineering work.

In plain words
What is it for?
Choose workflows for implementation, testing, code review, security review, frontend, backend, infrastructure, or complex engineering coordination.
Why use it?
It avoids loading many specialist instructions when one workflow, plus at most one relevant specialist, is enough.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: mentions Codex; $skill-name invocation.

Good fit Choose workflows for implementation, testing, code review, security review, frontend, backend, infrastructure, or complex engineering coordination.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/phelan164/codex-howto/choose-engineering-flow
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 Phelan164/codex-howto --skill choose-engineering-flow
Clone the repo
git clone --depth 1 https://github.com/Phelan164/codex-howto

Made for: 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 choose-engineering-flow

README.md
[![agentmods](https://agentmods.dev/badge/skills/phelan164/codex-howto/choose-engineering-flow/github.svg)](https://agentmods.dev/skills/phelan164/codex-howto/choose-engineering-flow)
Your own site
<a href="https://agentmods.dev/skills/phelan164/codex-howto/choose-engineering-flow"><img src="https://agentmods.dev/badge/skills/phelan164/codex-howto/choose-engineering-flow/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 choose-engineering-flow

Your own site · 80×15
<a href="https://agentmods.dev/skills/phelan164/codex-howto/choose-engineering-flow"><img src="https://agentmods.dev/badge/skills/phelan164/codex-howto/choose-engineering-flow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 468 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 $0.00058 $0.00468
Opus 5 $0.00029 $0.00234
Sonnet 5 $0.00012 $0.00094
Haiku 4.5 $0.00006 $0.00047

Measured 8d ago against content hash e50e775bb976, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

choose-engineering-flow 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 8d 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.

examples/skills/choose-engineering-flow/SKILL.md · 54 lines

What it actually says

Choose Engineering Flow

Use this explicit-only skill as an educational example of workflow routing. It is not part of the recommended installable catalog; prefer clear specialist descriptions and direct activation in normal work.

Recommend one entry skill and only the supporting skills that materially change the work. Do not perform the requested engineering task.

Route the request

  1. Identify the requested outcome: implement, test, review, secure, operate, or coordinate.
  2. Prefer one entry skill:
    • use $engineering-loop for an end-to-end feature or defect;
    • use $test-software for test-only work;
    • use $review-code for review-only work;
    • use $review-security for security-only analysis;
    • use $orchestrate-engineering only for complex work with genuinely independent workstreams.
  3. Add at most the relevant domain specialist:
    • $build-frontend for rendered UI, client behavior, or accessibility;
    • $build-backend for APIs, services, persistence, jobs, or integrations;
    • $operate-devops for infrastructure, CI/CD, deployment, or operations.
  4. Do not recommend a specialist already covered by the chosen entry skill unless its domain decisions are material.
  5. Ask one concise question only when the answer would change the entry skill.

Return the recommendation

Use this format:

Start with: $skill-name
Add only if needed: $other-skill
Why: one sentence tied to the task
Suggested invocation: $skill-name <bounded request and done condition>

Omit Add only if needed when one skill is sufficient. Never recommend loading the entire catalog by default.

Acceptance criteria

  • The recommendation uses existing skills rather than inventing a new workflow.
  • One skill owns the task lifecycle.
  • Supporting skills have a task-specific reason.
  • The output is shorter than the task description it routes.
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. 8d ago First seen · 54 lines · 58 tokens per session scan A e50e775bb976

Subscribe to this mod's changes

choose-engineering-flow is a skill published in the GitHub repository Phelan164/codex-howto (3 stars, last pushed 3d ago), licensed MIT. It adds 58 tokens to every session and 468 once invoked, about $0.0003 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.