skill-writer

skill-writer is a skill for Claude Code from ratnesh-maurya/cursor-claude-personas. It costs 27 tokens per session (988 once invoked), scanned A, original, MIT.

A guide and workflow for creating and improving AI-agent skills according to the Agent Skills specification. It covers planning, structure, descriptions, validation, and installation.

In plain words
What is it for?
Use it to create, update, validate, install, or improve skills for an AI coding assistant.
Why use it?
It provides a consistent process for turning domain knowledge into reusable instructions. It also helps reduce unclear triggers, missing details, and invalid skill files.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions Codex.

Good fit Use it to create, update, validate, install, or improve skills for an AI coding assistant.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ratnesh-maurya/cursor-claude-personas/skill-writer
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 ratnesh-maurya/cursor-claude-personas --skill skill-writer
Clone the repo
git clone --depth 1 https://github.com/ratnesh-maurya/cursor-claude-personas

Made for: Claude Code.

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 skill-writer

README.md
[![agentmods](https://agentmods.dev/badge/skills/ratnesh-maurya/cursor-claude-personas/skill-writer/github.svg)](https://agentmods.dev/skills/ratnesh-maurya/cursor-claude-personas/skill-writer)
Your own site
<a href="https://agentmods.dev/skills/ratnesh-maurya/cursor-claude-personas/skill-writer"><img src="https://agentmods.dev/badge/skills/ratnesh-maurya/cursor-claude-personas/skill-writer/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 skill-writer

Your own site · 80×15
<a href="https://agentmods.dev/skills/ratnesh-maurya/cursor-claude-personas/skill-writer"><img src="https://agentmods.dev/badge/skills/ratnesh-maurya/cursor-claude-personas/skill-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 988 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 $0.00027 $0.00988
Opus 5 $0.00014 $0.00494
Sonnet 5 $0.00005 $0.00198
Haiku 4.5 $0.00003 $0.00099

Measured 9d ago against content hash 2cb63b023754, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

skill-writer 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.

.claude/skills/skill-writer/SKILL.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Writer

Use this as the single canonical workflow for skill creation and improvement. Primary success condition: maximize high-value input coverage before authoring so the resulting skill has minimal blind spots.

Load only the path(s) required for the task:

Task Read
Set skill class and required dimensions references/mode-selection.md
Apply writing constraints for depth vs concision references/design-principles.md
Select structure pattern for this skill references/skill-patterns.md
Select workflow orchestration pattern for process-heavy skills references/workflow-patterns.md
Select output format pattern for deterministic quality references/output-patterns.md
Choose workflow path and required outputs references/mode-selection.md
Load representative synthesis examples by skill type references/examples/*.md
Synthesize external/local sources with depth gates references/synthesis-path.md
Author or update SKILL.md and supporting files references/authoring-path.md
Optimize skill description and trigger precision references/description-optimization.md
Iterate using positive/negative/fix examples references/iteration-path.md
Evaluate behavior and compare baseline vs with-skill (opt-in quantitative) references/evaluation-path.md
Register and validate skill changes references/registration-validation.md

Step 1: Resolve target and path

  1. Resolve target skill path and intended operation (create, update, synthesize, iterate).
  2. Read references/mode-selection.md and select the required path(s).
  3. Classify the skill (workflow-process, integration-documentation, security-review, skill-authoring, generic).
  4. Ask one direct question if class or depth requirements are ambiguous; otherwise state explicit assumptions.

Step 2: Run synthesis when needed

Read references/synthesis-path.md.

  1. Collect and score relevant sources with provenance.
  2. Apply trust and safety rules when ingesting external content.
  3. Produce source-backed decisions and coverage/gap status.
  4. Load one or more profiles from references/examples/*.md when the skill is hybrid.
  5. Enforce baseline source pack for skill-authoring workflows.
  6. Enforce depth gates before moving to authoring.

Read the full file on GitHub · 111 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 · 111 lines · 27 tokens per session scan A 2cb63b023754

Subscribe to this mod's changes

skill-writer is a skill published in the GitHub repository ratnesh-maurya/cursor-claude-personas (8 stars, last pushed 5mo ago), licensed MIT. It adds 27 tokens to every session and 988 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 2026-09-03.

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