plan-and-implement

plan-and-implement is a skill for Claude Code, Codex from josephbartlett/codex-relay. It costs 17 tokens per session (90 once invoked), scanned A, original, MIT.

A workflow that requires a coding agent to make a plan for a repository change and wait for approval before implementing it.

In plain words
What is it for?
Use it for Slack-triggered implementation tasks that need a reviewable plan, selected tests, stated risks, and a final record of changed files and verification.
Why use it?
It separates deciding what to change from making the change, reducing unintended edits and keeping work within an agreed scope.

Skill for Claude CodeCodex

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/josephbartlett/codex-relay/plan-and-implement
Any agent
npx skills add josephbartlett/codex-relay --skill plan-and-implement
Clone the repo
git clone --depth 1 https://github.com/josephbartlett/codex-relay

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 plan-and-implement

README.md
[![agentmods](https://agentmods.dev/badge/skills/josephbartlett/codex-relay/plan-and-implement.svg)](https://agentmods.dev/skills/josephbartlett/codex-relay/plan-and-implement)
Your own site
<a href="https://agentmods.dev/skills/josephbartlett/codex-relay/plan-and-implement"><img src="https://agentmods.dev/badge/skills/josephbartlett/codex-relay/plan-and-implement.svg" alt="Measured on agentmods" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 90 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 $0.00017 $0.00090
Opus 5 $0.00009 $0.00045
Sonnet 5 $0.00003 $0.00018
Haiku 4.5 $0.00002 $0.00009

Measured 4d ago against content hash f89cfdb7e63e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

plan-and-implement 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 4d 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.

packages/plugin/codex-relay/skills/plan-and-implement/SKILL.md · 13 lines

What it actually says

Use this workflow for Slack-triggered implementation tasks.

  1. Inspect only the relevant files and tests.
  2. Produce a concise plan with proposed edits, tests, and risks.
  3. Wait for explicit execution approval from the harness.
  4. During implementation, stay within the approved scope.
  5. End with changed files and verification results.
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. 4d ago First seen · 13 lines · 17 tokens per session scan A f89cfdb7e63e

Subscribe to this mod's changes

plan-and-implement is a skill published in the GitHub repository josephbartlett/codex-relay (1 stars, last pushed 4mo ago), licensed MIT. It adds 17 tokens to every session and 90 once invoked, about $0.0001 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.