decision-matrix

decision-matrix is a skill for Claude Code, Codex from cosmicstack-labs/mercury-agent-skills. It costs 45 tokens per session (2,254 once invoked), scanned A, original, MIT.

A decision-making guide that compares choices using methods such as pros and cons, weighted scoring, pre-mortems, and opportunity-cost analysis.

In plain words
What is it for?
Use it to compare tools, plans, vendors, or other options, decide which factors matter most, and explain the reasoning behind your choice.
Why use it?
It turns an unclear choice into a repeatable comparison and exposes assumptions you may have missed.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to compare tools, plans, vendors, or other options, decide which factors matter most, and explain the reasoning behind your choice.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cosmicstack-labs/mercury-agent-skills/decision-matrix
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 cosmicstack-labs/mercury-agent-skills --skill decision-matrix
Clone the repo
git clone --depth 1 https://github.com/cosmicstack-labs/mercury-agent-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 decision-matrix

README.md
[![agentmods](https://agentmods.dev/badge/skills/cosmicstack-labs/mercury-agent-skills/decision-matrix/github.svg)](https://agentmods.dev/skills/cosmicstack-labs/mercury-agent-skills/decision-matrix)
Your own site
<a href="https://agentmods.dev/skills/cosmicstack-labs/mercury-agent-skills/decision-matrix"><img src="https://agentmods.dev/badge/skills/cosmicstack-labs/mercury-agent-skills/decision-matrix/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 decision-matrix

Your own site · 80×15
<a href="https://agentmods.dev/skills/cosmicstack-labs/mercury-agent-skills/decision-matrix"><img src="https://agentmods.dev/badge/skills/cosmicstack-labs/mercury-agent-skills/decision-matrix.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,254 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00045 $0.02254
Opus 5 $0.00023 $0.01127
Sonnet 5 $0.00009 $0.00451
Haiku 4.5 $0.00005 $0.00225

Measured 9d ago against content hash f7c7ba5b5d10, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

decision-matrix 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 9d 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.

categories/creative-personal-development/decision-matrix/SKILL.md · 224 lines

How it starts

The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Decision Matrix

What It Does

Takes the guesswork out of tough decisions by applying structured frameworks. Instead of spinning in circles with pros/cons lists, you get a repeatable system for comparing options, weighting what matters, and reaching a conclusion you can explain and defend.


Frameworks Available

1. Classic Pros & Cons (Benjamin Franklin Method)

Best for: Quick decisions with low-to-moderate stakes

Step Action
1 Draw two columns: PROS and CONS
2 List every reason for and against — no filtering
3 Weigh each item (not all pros are equal). Assign +1 to +5 for pros, -1 to -5 for cons
4 Sum the scores. A net positive suggests "yes." Consider emotional weight too

Guardrail: Pros/cons alone miss hidden assumptions. Always follow with: "What am I not considering?"

2. Weighted Decision Matrix (Pugh Matrix)

Best for: Comparing multiple options against multiple criteria

| Criteria               | Weight (1-5) | Option A | Option B | Option C |
|------------------------|-------------|----------|----------|----------|
| Cost                   |      4      |   8/10   |   6/10   |   9/10   |
| Time to Market         |      3      |   7/10   |   9/10   |   5/10   |
| Strategic Fit          |      5      |   9/10   |   4/10   |   7/10   |
| Team Capacity          |      2      |   6/10   |   8/10   |   4/10   |
| **Weighted Total**     |             |   113    |   92     |   103    |

Steps:

  1. List all viable options (rows)
  2. Define criteria that matter (columns)
  3. Assign a weight (1-5) to each criterion based on importance
  4. Score each option per criterion (1-10)
  5. Multiply score × weight, sum across criteria
  6. Highest weighted total wins — but sanity-check the result

3. Pre-Mortem

Best for: High-stakes decisions where risk mitigation is critical

"It's 12 months from now and our decision has failed spectacularly. How did it happen?"

Step Technique
1 Assume the decision was made and led to disaster
2 Fast-forward and write the "post-mortem" — what went wrong?
3 Generate 5-10 plausible failure modes
4 For each failure, ask: "What could prevent this?"
5 Incorporate those safeguards into the decision

Read the full file on GitHub · 224 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. 9d ago First seen · 224 lines · 45 tokens per session scan A f7c7ba5b5d10

Subscribe to this mod's changes

decision-matrix is a skill published in the GitHub repository cosmicstack-labs/mercury-agent-skills (471 stars, last pushed 15d ago), licensed MIT. It adds 45 tokens to every session and 2,254 once invoked, about $0.0002 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 2026-08-30.

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