Decision Memo Skill for Codex

Turn background, options, and stakeholder input into an auditable decision memo. Compare cost, risk, reversibility, and the conditions that would change the recommendation.

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Install in Codex

Use a Codex environment that can discover project skills. The example can be tested in a local project.

In a temporary directory, run git clone https://github.com/ClarentCinematics/Codex-Skills-for-Enterprise.git. Enter the clone, run git checkout --detach 3598e7788282b6548430aadfcbfcfd7181ebb02a, and review the pinned SKILL.md.
Copy the entire skills/decision-memo folder to .agents/skills/decision-memo in your own project, keeping its scripts, templates, and references together.
Open Codex in that project. Choose the skill with /skills or mention $decision-memo, then run the example below. Restart Codex if the list does not refresh.

Example task

Compare two ways to maintain help pages. Manual updates take eight hours monthly. Automation takes 24 hours to build and two hours monthly thereafter. Ask for a one-page memo, with missing information flagged.

What to check

The memo states the decision and compares both options on the same basis. If the hours are comparable, six hours of monthly savings offset the initial effort in about four months. Financial costs are left open.

Original SKILL.md on GitHub · Updated 2026-11-11

Frequently asked question

How should a memo handle stakeholder disagreement?

Document the constraints behind each option and name the unresolved facts that could change the recommendation so the comparison can be revisited.