How to use the ljg-invest investment analysis agent skill

What is an agent skill, and what does ljg-invest make the agent do?

An agent skill is a folder containing a SKILL.md file. The file tells a compatible agent when to use the skill and how to carry out the task. The ljg-invest skill is one such file, and it is listed here under skills/ljg-invest with the MIT licence.

Once the skill is active, the agent writes a report with a fixed structure. It opens with a basic profile table (project name, track definition, stage, funding and a data snapshot), then judges whether the business is a machine that creates new order. It also looks at a creation formula, compares market perception with the author's own view, and ends with a recommendation to invest, watch or pass, plus core assumptions, exit signals and open questions. The skill's own rules say the report must take a clear position and must not use hedged language like 'could go either way'.

• Input: a company name, BP, text description, or conversation records
• Research: for well-known companies, the agent is told to look up recent financials and industry data instead of relying on memory
• Output: a markdown file saved to ~/Documents/notes/
• Language: the skill's instructions say to write the report in Chinese

How do you install the ljg-invest skill?

There are two routes. Use the first if you work in Claude Code or keep skills on disk. Use the second if you use the Claude apps.

For Claude Code or a SKILL.md-compatible agent, download the ZIP of the skill from this page and unzip it into either your user skills folder or a project-level folder. The user-level location is ~/.claude/skills/. A project can use its own .claude/skills/ folder inside the project directory. The skill folder should contain SKILL.md.

For the Claude apps, download the ZIP and upload it under Settings, then Capabilities, then Skills.

• User-wide: ~/.claude/skills/
• Single project: .claude/skills/ inside that project
• Claude apps: Settings → Capabilities → Skills, then upload the ZIP

How do you trigger the skill with a natural request?

You do not need a special command. The skill is triggered by phrases in its description. Chinese triggers include 投资报告, 投资分析, 分析这个项目 and 写投资报告. English triggers include 'investment report', 'invest analysis' and 'investment report'. The skill also activates when you paste or reference meeting notes, pitch decks or founder interviews and ask for analysis.

Give the agent as much material as you have. A company name alone is enough for a well-known company, because the skill asks the agent to research it. For an early-stage startup, a pitch deck or interview transcript gives the agent far more to judge.

• Analyse this project: [company name]. Use the investment report skill.
• Here are my meeting notes with the founder. Write an investment analysis.
• Write an investment report on the attached pitch deck.
• Investment analysis for [company], based on the founder interview below.

What do you need before running it?

The skill needs Claude Code or another SKILL.md-compatible agent with file write access. It also needs a research capability, either web search or a subagent, to look up public company data. The report is saved with a Write tool to ~/Documents/notes/, so the agent must be able to write there.

The skill does not run scripts. It does use the network, because it relies on research the agent performs to check facts.

• Claude Code or a SKILL.md-compatible agent
• File write access to ~/Documents/notes/
• Web search or a subagent for public company data
• No scripts are run by this skill

What does the output file look like?

The skill names each report using a denote-style pattern: a timestamp, a marker, and the project name. The file is written as markdown. After writing, the agent reports the full file path back to you.

The skill's rules say to use only information it can verify. If something cannot be found, the report should mark it as unknown rather than fill the gap.

• Folder: ~/Documents/notes/
• Format: markdown
• Example name: 20260326153000==z--投资分析-example-ai.md

What should you watch for in safety and quality?

Because the skill uses the network and an AI agent writes the opinion, check the facts yourself. The framework is subjective. The report is an AI-written opinion, not financial advice, and it should not replace independent due diligence.

Data risk is the main concern. The skill relies on research the agent performs. For companies with fast-changing financials, the agent may use outdated or incorrect figures if it cannot verify them. Check every number against primary sources before you rely on it.

The skill also forbids neutral, balanced language. If you need a balanced assessment, this skill is the wrong tool.

• Verify all financial figures against primary sources
• Treat the recommendation as one opinion, not a decision
• Expect a one-sided write-up by design

Tips for better reports

The more primary material you give, the better the judgement. Pitch decks, interview transcripts and meeting notes let the agent check the founder's claims against the framework. For public companies, name the company precisely so the research step finds the right data.

The skill says the report length should match what the analysis needs. A short company may need only a few pages, while a complex one may need much more. Sections with little material may be shortened or skipped.

• Paste the actual pitch deck text or transcript rather than a summary
• Name the company precisely for public companies
• Ask follow-up questions on the saved file to test the assumptions
• Compare the same project across two sessions to see whether the judgement holds