逆向工作法

逆向工作法 is a skill for Claude Code, Codex from t0moon/competitorsmart. It costs 28 tokens per session (1,178 once invoked), scanned A, original, no licence file.

A set of 15 lessons from 12 product leaders about starting with customer needs and working backwards to design a product solution.

In plain words
What is it for?
Use it to identify customer needs, define the desired outcome, and derive a suitable product approach from those needs.
Why use it?
It helps prevent teams from choosing a solution before understanding the problem customers need solved.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to identify customer needs, define the desired outcome, and derive a suitable product approach from those needs.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/t0moon/competitorsmart/17-working-backwards
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 t0moon/competitorsmart --skill 17-working-backwards
Clone the repo
git clone --depth 1 https://github.com/t0moon/competitorsmart

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 逆向工作法

README.md
[![agentmods](https://agentmods.dev/badge/skills/t0moon/competitorsmart/17-working-backwards.svg)](https://agentmods.dev/skills/t0moon/competitorsmart/17-working-backwards)
Your own site
<a href="https://agentmods.dev/skills/t0moon/competitorsmart/17-working-backwards"><img src="https://agentmods.dev/badge/skills/t0moon/competitorsmart/17-working-backwards.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,178 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 unknown 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 $0.00028 $0.01178
Opus 5 $0.00014 $0.00589
Sonnet 5 $0.00006 $0.00236
Haiku 4.5 $0.00003 $0.00118

Measured 8d ago against content hash af3d6f4e05a2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

逆向工作法 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.

skills/lenny-pm-skills/17-逆向工作法-working-backwards/SKILL.md · 107 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 107 lines · 28 tokens per session scan A af3d6f4e05a2

Subscribe to this mod's changes

逆向工作法 is a skill published in the GitHub repository t0moon/competitorsmart (24 stars, last pushed 4mo ago), with no licence file. It adds 28 tokens to every session and 1,178 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 2026-08-30.