frontier-mcp: Skill for Claude Code

.agents/skills/writing-fragments/SKILL.md

writing-fragments is a skill for Claude Code, Codex from 51ck/frontier-mcp. It costs 16 tokens per session (786 once invoked), scanned A, a copy of writing-fragments, MIT.

A writing method for collecting raw text fragments while exploring an idea, without imposing an outline or article structure. It stores the fragments in one Markdown file.

In plain words
What is it for?
Use it for interviews and early exploration when you want to capture ideas before shaping them into an article.
Why use it?
It lets writers gather possible material without prematurely deciding what the final piece should look like.

Skill for Claude CodeCodex

Written for Claude Code and Codex: disable-model-invocation in frontmatter, but also agents/openai.yaml present. Also seen: installed under .agents/ (shared by several agents).

This is 51ck/frontier-mcp's own configuration. It tells Claude Code and Codex how to work on frontier-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything frontier-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to 51ck/frontier-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/51ck/frontier-mcp/master/.agents/skills/writing-fragments/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/51ck/frontier-mcp

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 writing-fragments

README.md
[![agentmods](https://agentmods.dev/badge/skills/51ck/frontier-mcp/writing-fragments/github.svg)](https://agentmods.dev/skills/51ck/frontier-mcp/writing-fragments)
Your own site
<a href="https://agentmods.dev/skills/51ck/frontier-mcp/writing-fragments"><img src="https://agentmods.dev/badge/skills/51ck/frontier-mcp/writing-fragments/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 writing-fragments

Your own site · 80×15
<a href="https://agentmods.dev/skills/51ck/frontier-mcp/writing-fragments"><img src="https://agentmods.dev/badge/skills/51ck/frontier-mcp/writing-fragments.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 786 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 100% copy Near-identical to another mod 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 $0.00016 $0.00786
Opus 5.5 $0.00006 $0.00314
Sonnet 5.5 $0.00003 $0.00157
Haiku 4.5 $0.00002 $0.00079

Measured 1mo ago against content hash 298b0edd23df, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

writing-fragments 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 1mo 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.

Origin

This is a copy

100% identical to writing-fragments — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/writing-fragments/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

This is pure explore: widen the space of what could be written without committing to structure. Committing is exploit, a separate skill's job. Run a grilling session that produces fragments, interviewing the user relentlessly about whatever they want to write about. Imposing phases, outlines, or article structure is out of scope here.

As fragments emerge from either side of the conversation, append them to a single markdown file.

If the user did not pass a path, ask once where to save the document, then remember it for the rest of the session.

Capture fragments from the very first thing the user says, including the initial prompt.

On first write, put a single H1 at the top with a working title (it can change later) and nothing else: no metadata, no TOC, no date.

What is a fragment

A fragment is any piece of text that might survive into the final article. It must be readable by the author (the author can tell what it means), but it does not need to define its terms or be comprehensible to a cold reader. The bar is "is this a piece of good writing?", not "is this a self-contained argument?"

Fragments are deliberately heterogeneous. Examples of what could be a fragment:

  • A sharp sentence you'd want to deploy somewhere but don't yet know where.
  • A claim with a one-line justification.
  • A vignette: a thing that happened, a code snippet, a scenario, an analogy.
  • A half-thought: "something about how X feels like Y, work this out later."
  • A quote, a piece of dialogue, an overheard line.
  • A list of related observations that hang together by feel.
  • A complaint, a confession, a punchline.
  • A leading word: a compact metaphor or coinage the whole piece can hang on (one term that names the idea, the way tracer bullets or fog of war names a whole pattern).

Of these, the leading word is the most valuable fragment to land. It is load-bearing: name the right one in explore and it shapes the structure, the transitions, and the title later, paying dividends through the entire exploit phase. When the conversation circles a recurring idea, push to coin a word for it.

The novelist's diary is the model: years of unstructured noticings that later get mined for raw material. Fragments are noticings.

Read the full file on GitHub · 80 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 1mo ago First seen · 80 lines · 16 tokens per session scan A 298b0edd23df

Subscribe to this mod's changes

writing-fragments is a skill published in the GitHub repository 51ck/frontier-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 16 tokens to every session and 786 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to writing-fragments, differing in 0 lines, and is treated as a copy.

Related

writing-fragments compared with skills from other repositories

writing-fragments next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
writing-fragments51ck/frontier-mcpSkill01mo agoMITA16Claude Code, Codex
imagegenopenai/codexSkill133kyesterdayApache-2.0A113Codex
playwright-climicrosoft/playwrightSkill99kyesterdayApache-2.0A19Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79k4d agoMITA200Claude Code, Codex
systematic-debuggingobra/superpowersSkill313k3d agoMITA21Claude Code
next-cache-components-adoptionvercel/next.jsSkill143kyesterdayMITA95Claude Code
next-partial-prefetching-adoptionvercel/next.jsSkill143kyesterdayMITA103Claude Code