What is x-post-writer?

A writing guide for creating short posts on X from notes, drafts, links, or checked sources. It covers single posts, replies, quote posts, threads, launches, and personal stories.

Use it to draft, rewrite, or adapt content for X, including announcements, recommendations, link posts, replies, and multi-post threads.

It helps keep posts faithful to their source while checking claims and matching the requested format and voice.

x-post-writer — Skill for Claude Code and Codex by asimons81

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 asimons81/hermes-field-kit --skill x-post-writer

Clone the repo

git clone --depth 1 https://github.com/asimons81/hermes-field-kit

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/asimons81/hermes-field-kit/x-post-writer/github.svg)](https://agentmods.dev/skills/asimons81/hermes-field-kit/x-post-writer)

Your own site

<a href="https://agentmods.dev/skills/asimons81/hermes-field-kit/x-post-writer"><img src="https://agentmods.dev/badge/skills/asimons81/hermes-field-kit/x-post-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/asimons81/hermes-field-kit/x-post-writer"><img src="https://agentmods.dev/badge/skills/asimons81/hermes-field-kit/x-post-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,209 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00046	$0.02209
Opus 5	$0.00023	$0.01104
Sonnet 5	$0.00009	$0.00442
Haiku 4.5	$0.00005	$0.00221

Measured 10d ago against content hash 6155649c91a0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

x-post-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 10d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/validate_bundle.py, tests/test_contract.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/x-post-writer/SKILL.md · 242 lines

How it starts

The opening of the file, as written. The whole thing — 242 lines — stays where its author put it; the contents beside it link to each section on GitHub.

X Post Writer

Overview

Write short-form X content from notes, drafts, links, or verified source material. Default to one finished post unless the user explicitly requests a thread or multiple posts.

Source fidelity outranks punch, post count, inferred benefits, and creative expansion. Internal routing, objectives, verification notes, source ledgers, and quality checks are never part of the delivered copy.

route format -> route source -> choose objective -> verify claims -> draft -> voice pass -> quality gate -> finished text

Load references progressively:

references/formats.md for the selected format
references/source-routing.md when repurposing or selecting source treatment
references/claim-verification.md for risky factual claims
references/voice-customization.md when a distinct voice must be preserved
references/algorithm-notes.md only for distribution or optimization questions

When to Use

Use this skill for:

Single X posts, rewrites, launches, link drops, recommendations, or announcements
Quote posts or commentary on an existing X post
Replies
Explicit threads or multi-post sequences
Personal milestones, reflections, or first-person stories
Fresh X angles from articles, videos, releases, or project updates

Do not use this skill for:

Long-form X Articles or essay-length content
Source extraction, account analytics, or media downloading
Publishing, scheduling, or browser composition without separate authorization
Claims that require evidence when no evidence can be obtained

Safety Contract

Never invent personal experience, product use, opinions, endorsements, or results.
Never add technical mechanisms, benefits, numbers, or attributions that are not supplied or verified.
Treat private analytics, revenue, customer data, and unpublished information as sensitive.
Never publish or schedule automatically.
Current facts and platform behavior must be verified immediately before use.
An instruction to state a claim is not evidence for that claim.

Read the full file on GitHub · 242 lines

Files

What ships with it

11 files 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.

10d ago First seen · 242 lines · 46 tokens per session scan A 6155649c91a0

Subscribe to this mod's changes

x-post-writer is a skill published in the GitHub repository asimons81/hermes-field-kit (125 stars, last pushed 3d ago), licensed Apache-2.0. It adds 46 tokens to every session and 2,209 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 2026-08-30.

Marketing and SEO Python Writing and docs agent-skills ai-agents hermes-agent open-source

x-post-writer

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

X Post Writer

Overview

When to Use

Safety Contract

What ships with it

What this file has done since we first saw it

Other skills, from other repositories

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