gap-analysis

gap-analysis is a skill for Claude Code from xD4O/praxis. It costs 99 tokens per session (1,065 once invoked), scanned A, original, MIT.

A review method for checking a proposed design, plan, or recommendation from several angles, including failure modes, side effects, coverage, simplicity, and how easy it is to reverse.

In plain words
What is it for?
Use it to review architecture decisions, project plans, designs, and other recommendations before approval or implementation.
Why use it?
It catches risks that are easy to miss when reviewing your own conclusion. It is intended to happen before presenting a significant recommendation as final.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions subagents.

Part of the praxis plugin — 19 skills, 13 commands, 1 hook shipped together

Good fit Use it to review architecture decisions, project plans, designs, and other recommendations before approval or implementation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xd4o/praxis/gap-analysis
View source ↗ xD4O/praxis
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 xD4O/praxis --skill gap-analysis
Clone the repo
git clone --depth 1 https://github.com/xD4O/praxis

Made for: Claude Code.

Or install praxis, the plugin that ships this one along with the rest of its 19 skills, 13 commands, 1 hook.

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 gap-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/xd4o/praxis/gap-analysis/github.svg)](https://agentmods.dev/skills/xd4o/praxis/gap-analysis)
Your own site
<a href="https://agentmods.dev/skills/xd4o/praxis/gap-analysis"><img src="https://agentmods.dev/badge/skills/xd4o/praxis/gap-analysis/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 gap-analysis

Your own site · 80×15
<a href="https://agentmods.dev/skills/xd4o/praxis/gap-analysis"><img src="https://agentmods.dev/badge/skills/xd4o/praxis/gap-analysis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 99 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,065 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 $0.00099 $0.01065
Opus 5.5 $0.00040 $0.00426
Sonnet 5.5 $0.00020 $0.00213
Haiku 4.5 $0.00010 $0.00106

Measured 15d ago against content hash 1b9ca42933d0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gap-analysis 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 15d 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.

skills/gap-analysis/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Gap Analysis Protocol

EXTREMELY_IMPORTANT: This is a MANDATORY protocol, not a suggestion. Follow every step. Do not skip steps. Do not combine steps. Do not summarize. Work through each gate in order.

You have produced a design, plan, or recommendation. Before presenting it as final, you MUST run all 7 checks below. Do not skip any. Report each result explicitly.

If your harness supports subagents, dispatch these checks to a fresh-context reviewer using agents/reasoning-reviewer.md — a reviewer that has not seen your design's justifications catches what self-review misses. Required at the DEEP tier; recommended whenever the decision is hard to reverse.

CHECK 1 — Inversion

Ask: "How would I guarantee this fails?"

List at least 3 specific failure modes; keep listing while distinct ones come to mind, stop when candidates turn contrived. For each, verify your solution prevents it. If any failure mode is not prevented, flag it as an open risk.

CHECK 2 — Second-order consequences

Ask: "And then what?" three times.

  • 1st order: [the immediate intended effect]
  • 2nd order: [the effect of that effect — often unintended]
  • 3rd order: [the cascading consequence — often counterintuitive]

If 2nd or 3rd order effects are negative, state whether they're acceptable or require design changes.

CHECK 3 — MECE coverage

Ask: "Have I covered the entire problem space with no gaps and no overlaps?"

List the dimensions you've addressed. Identify any dimension you haven't addressed. Gaps are where surprises live.

CHECK 4 — Map vs territory

Ask: "Where does my model diverge from reality?"

List at least 3 things you simplified, assumed, or ignored — more if you know of them. For each, state the risk if reality differs from your model.

CHECK 5 — Adversarial

Ask: "How would a hostile actor exploit this? How would a careless user break this?"

Identify the weakest point. State whether it's acceptable or needs hardening.

CHECK 6 — Simplicity

Ask: "Is there a simpler solution I'm overlooking?"

Read the full file on GitHub · 117 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. 15d ago First seen · 117 lines · 99 tokens per session scan A 1b9ca42933d0

Subscribe to this mod's changes

gap-analysis is a skill published in the GitHub repository xD4O/praxis (28 stars, last pushed 2mo ago), licensed MIT. It adds 99 tokens to every session and 1,065 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-10-02.

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