create-skill

A workflow for designing and writing a SKILL.md file, which is a set of instructions an agent follows for a repeatable task.

In plain words
What is it for?
Use it to create a reusable agent workflow for tasks such as research, code review, or project reporting.
Why use it?
It helps turn an informal process into clear triggers, steps, tool use, checks, and a consistent result format.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/gettalon/talon-plugins/create-skill
Any agent
npx skills add gettalon/talon-plugins --skill create-skill
Clone the repo
git clone --depth 1 https://github.com/gettalon/talon-plugins

Made for: Claude Code, Codex.

Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 955 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00047 $0.00955
Opus 5 $0.00023 $0.00477
Sonnet 5 $0.00009 $0.00191
Haiku 4.5 $0.00005 $0.00096

Measured 2d ago against content hash f011a6bb24dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

create-skill 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 2d 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.

plugins/agent-factory/skills/create-skill/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Create Skill — Domain Workflow Designer

Design a SKILL.md file that teaches an agent how to complete a specific domain task through a structured, repeatable workflow.

What Makes a Good Skill

A skill is NOT just instructions. It's a repeatable workflow with:

  • Clear trigger conditions (when to activate)
  • Step-by-step checklist (track progress)
  • Specific tool calls at each step (what data to gather)
  • Validation/sanity checks (catch errors before presenting)
  • Structured output format (consistent results)

A well-structured skill tells the agent exactly which tools to call, what data to extract, how to calculate, how to validate, and how to present results.

Process

Step 1: Understand the Task

Ask one at a time:

  1. What task does this skill perform?

    • e.g., "Analyze a company's competitive moat"
    • e.g., "Review a pull request for security issues"
    • e.g., "Generate a weekly project status report"
  2. When should the agent activate this skill?

    • What trigger phrases or questions activate it?
    • e.g., "Triggers on: moat analysis, competitive advantage, defensibility, economic moat"
  3. What tools does the agent need?

    • web_search, web_fetch, get_financials, read_file, shell, browser, etc.
    • What APIs or data sources are required?
  4. What does the output look like?

    • Tables, prose, structured report, checklist?
    • Show an example of ideal output if possible.

Step 2: Design the Workflow

Break the task into 4-8 sequential steps. For each step define:

  • What to do: Clear action (e.g., "Call get_financials with...")
  • What data to extract: Specific fields/values
  • Fallback: What to do if data is missing
  • Validation: How to check the step succeeded

Design patterns to follow:

  • Each step should produce data the next step consumes
  • Include cross-validation between steps (e.g., compare two independent estimates)
  • Cap assumptions (e.g., "growth rate capped at 15%")
  • Always include a validation step before final output

Read the full file on GitHub · 123 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. 2d ago First seen · 123 lines · 47 tokens per session scan A f011a6bb24dc

Subscribe to this mod's changes

create-skill is a skill published in the GitHub repository gettalon/talon-plugins (6 stars, last pushed 5mo ago), licensed MIT. It adds 47 tokens to every session and 955 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 2026-08-31.

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