Agent skill

Crossposting

Crosspost Wasp blog articles (MDX) to DEV.to and Medium. An agent skill from wasp-lang/wasp.

Install Crossposting

skills CLI

$ npx skills add wasp-lang/wasp --skill crossposting -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install wasp-lang/wasp crossposting --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/wasp-lang/wasp.git skills-src && mkdir -p .claude/skills && cp -r skills-src/web/.claude/skills/crossposting .claude/skills/crossposting && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "crossposting" agent skill from https://github.com/wasp-lang/wasp/tree/main/web/.claude/skills/crossposting into .claude/skills/crossposting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossposting", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/wasp-lang/wasp/tree/main/web/.claude/skills/crossposting

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add wasp-lang/wasp --skill crossposting -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install wasp-lang/wasp crossposting --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/wasp-lang/wasp.git skills-src && mkdir -p .agents/skills && cp -r skills-src/web/.claude/skills/crossposting .agents/skills/crossposting && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "crossposting" agent skill from https://github.com/wasp-lang/wasp/tree/main/web/.claude/skills/crossposting into .agents/skills/crossposting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossposting", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add wasp-lang/wasp --skill crossposting -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install wasp-lang/wasp crossposting --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/wasp-lang/wasp.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/web/.claude/skills/crossposting .cursor/skills/crossposting && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "crossposting" agent skill from https://github.com/wasp-lang/wasp/tree/main/web/.claude/skills/crossposting into .cursor/skills/crossposting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossposting", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/wasp-lang/wasp.git --path web/.claude/skills/crossposting

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add wasp-lang/wasp --skill crossposting -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install wasp-lang/wasp crossposting --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/wasp-lang/wasp.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/web/.claude/skills/crossposting .gemini/skills/crossposting && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "crossposting" agent skill from https://github.com/wasp-lang/wasp/tree/main/web/.claude/skills/crossposting into .gemini/skills/crossposting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossposting", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install wasp-lang/wasp crossposting

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add wasp-lang/wasp --skill crossposting -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/wasp-lang/wasp.git skills-src && mkdir -p .github/skills && cp -r skills-src/web/.claude/skills/crossposting .github/skills/crossposting && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "crossposting" agent skill from https://github.com/wasp-lang/wasp/tree/main/web/.claude/skills/crossposting into .github/skills/crossposting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossposting", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add wasp-lang/wasp --skill crossposting -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install wasp-lang/wasp crossposting --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/wasp-lang/wasp.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/web/.claude/skills/crossposting .opencode/skills/crossposting && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "crossposting" agent skill from https://github.com/wasp-lang/wasp/tree/main/web/.claude/skills/crossposting into .opencode/skills/crossposting/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crossposting", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: crossposting
GitHub stars: 19k
Token cost: ~1.1k tokens
SKILL.md length: 514 words
Files: 5 (incl. scripts)
Skills in repo: 4
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Crosspost Wasp blog articles (MDX) to DEV.to and Medium. An agent skill from wasp-lang/wasp.

Works in 6 steps: Convert the MDX article → Navigate to https://medium.com/new-story → Set the article title → …
Tasks that involve Markdown
Runs TypeScript and JavaScript scripts from its folder; calls npx; reaches medium.com; needs DEVTO_API_KEY and YOUTUBE_CLIENT_SECRET

What it does

Crossposting is an agent skill from wasp-lang/wasp. Crosspost Wasp blog articles (MDX) to DEV.to and Medium.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts (for example `README.md`, `scripts/convert-mdx.ts` and `scripts/medium-helpers.js`).

It sits in Documents & Office, covering Markdown. It works with YouTube. The repository describes itself as: The batteries-included full-stack framework for the AI era. Develop JS/TS web apps (React, Node.js, and Prisma) using declarative code that abstracts away complex full-stack… The licence is MIT.

When your agent uses it

Tasks that involve Markdown

Example prompts

“/crossposting”

Requirements

Node.js
A credential in DEVTO_API_KEY
A credential in YOUTUBE_CLIENT_SECRET

Workflow steps

6 steps, taken from the step headings in SKILL.md.

Convert the MDX article
Navigate to https://medium.com/new-story
Set the article title
Paste the article body
Verify
Before Publishing (human steps)

What it can do on your machine

Read from SKILL.md and the folder at commit c8a7939. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 3 files in scripts/ (TypeScript and JavaScript), which the agent can run.
Shell commands in SKILL.md call:
- npx
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
- medium.com
Also links to:
- dev.to
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- DEVTO_API_KEY
- YOUTUBE_CLIENT_SECRET
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Crossposting loads about 1.1k tokens when it runs. Until then it costs about 17 tokens; SKILL.md has 514 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~17
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from wasp-lang/wasp at commit c8a7939, republished under its MIT licence (© wasp-lang). 514 words, ~1,132 tokens.

Download SKILL.mdSave it as .claude/skills/crossposting/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.

name: crossposting
description: Crosspost Wasp blog articles (MDX) to DEV.to and Medium.

MDX Conversion Script

Converts a Wasp blog MDX file to clean markdown, HTML, and Medium-ready chunks. Output is saved to .claude/skills/crossposting/scripts/output/.

bash

npx tsx .claude/skills/crossposting/scripts/convert-mdx.ts <path-to-mdx-file> [--publish-devto] [--update-devto <id>] [--upload-videos]

Output files (always written):

<slug>.md — clean markdown (for DEV.to)
<slug>.html — HTML (for Medium preview/reference)
<slug>-medium-chunks.json — { title: string, chunks: string[] } pre-split at <h2> boundaries, pre-escaped for JS template literals

Flags:

--publish-devto — POST as draft to DEV.to (requires DEVTO_API_KEY)
--update-devto <id> — PUT to existing DEV.to article (requires DEVTO_API_KEY)
--upload-videos — upload local .mp4s to YouTube (unlisted), embed as {% youtube URL %} liquid tags

Env vars: DEVTO_API_KEY (from https://dev.to/settings/extensions), YOUTUBE_CLIENT_ID + YOUTUBE_CLIENT_SECRET (saved in 1password for the users).

Notes:

canonical_url is auto-generated from MDX filename → wasp.sh/blog/...
Without --upload-videos, local .mp4 videos become plain links

YouTube Setup (one-time, human steps)

Create Google Cloud project → enable YouTube Data API v3 → create OAuth 2.0 Desktop credentials
Add YOUTUBE_CLIENT_ID and YOUTUBE_CLIENT_SECRET to ~/.zshrc
Run npx tsx .claude/skills/crossposting/scripts/upload-youtube.ts --auth → authorize in browser (select @wasplang channel if prompted)
Refresh token stored in ~/.youtube-upload-tokens.json
Check channel: npx tsx .claude/skills/crossposting/scripts/upload-youtube.ts --whoami. Wrong channel? Delete token file and re-auth.

Crossposting to Dev.to

Use --publish-devto or --update-devto <id> flags. Requires DEVTO_API_KEY.

Crossposting to Medium

Paste HTML into Medium's editor via Chrome DevTools MCP. The user must be logged in to Medium using email login (not google oauth) with info@wasp-lang.dev.

Steps

1. Convert the MDX article

Run the conversion script, if it hasn't been run yet (see usage above).

Images: Medium does not support webp. Convert webp images to jpg for later manual upload:

bash

for f in static/img/<slug>/*.webp; do sips -s format jpeg "$f" --out ".claude/skills/crossposting/scripts/output/$(basename "${f%.webp}.jpg")"; done

2. Navigate to `https://medium.com/new-story`

The human user must login to Medium with the info@wasp-lang.dev email and get the OTP sent to your email.

3. Set the article title

Do NOT use the fill tool — it puts text into the body paragraph instead. Use evaluate_script with the setMediumTitle function from scripts/medium-helpers.js.

Read setMediumTitle from scripts/medium-helpers.js.
Replace TITLE_PLACEHOLDER with the actual title (escape backticks and ${ sequences).
Call evaluate_script with the resulting function string.

Then press Enter to move cursor to the body area.

Show full SKILL.md (187 more words)Show less

4. Paste the article body

IMPORTANT: Do NOT use document.execCommand — it bypasses Medium's internal state and causes save errors. Always use synthetic ClipboardEvent paste.

IMPORTANT: Chunks are already pre-escaped for JS template literals and pre-processed for Medium (YouTube URLs, image placeholders). Inline each chunk string directly into the pasteMediumChunk function body where HTML_CHUNK_PLACEHOLDER appears. Do NOT base64-encode, store chunks in page variables, or add any intermediate encoding steps.

Read output/<slug>-medium-chunks.json — chunks are ready to paste as-is.
Click the body paragraph to focus it.
For each chunk, use evaluate_script with the pasteMediumChunk function from scripts/medium-helpers.js. Replace HTML_CHUNK_PLACEHOLDER directly with the chunk string content.
Wait for "Saved" status after all chunks are pasted.

5. Verify

Snapshot the article to confirm it looks correct and shows "Draft" / "Saved"
Scroll through to confirm section order matches the original and make any necessary adjustments.

6. Before Publishing (human steps)

Replace [IMAGE: filename.jpg] markers with actual image uploads in Medium's editor
Add any YouTube embeds that didn't auto-embed (Medium auto-embeds standalone YouTube URLs in <p> tags)
Add the banner image and canonical URL
Review and publish from Medium's UI

Files

SKILL.md and 4 other files (scripts) in web/.claude/skills/crossposting of wasp-lang/wasp.

SKILL.md
README.md
scripts/convert-mdx.ts
scripts/medium-helpers.js
scripts/upload-youtube.ts

Open the folder on GitHubat commit c8a7939

Compare with similar skills

Crossposting next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Crossposting compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Crossposting this skillwasp-lang/wasp	19k	—	~1.1k	Automated safety check: Pass	MIT	yesterday
MarkitdownImCa0/just-laws	781	14 repos	~3.2k	Automated safety check: Notes	MIT	yesterday
Add Related Resourcespingcap/docs	616	—	~1.8k	Automated safety check: Pass	Custom licence	yesterday
Lecture To Mdysyecust/lecture-to-notes	270	—	~3.9k	Automated safety check: Pass	Custom licence	5 days ago
Gbro Series Vocabpyang5166/gbro-series-vocab	162	—	~1.1k	Automated safety check: Pass	MIT	2 mo ago
Markdown Converterintellectronica/agent-skills	295	4 repos	~492	Automated safety check: Pass	CC0-1.0	5 mo ago

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Questions about Crossposting

What does Crossposting do?

Crosspost Wasp blog articles (MDX) to DEV.to and Medium. An agent skill from wasp-lang/wasp. Crossposting is an agent skill from wasp-lang/wasp.to and Medium.

When should I use Crossposting?

Crossposting fits situations like: tasks that involve Markdown.

How do I install Crossposting in Claude Code?

Run `npx skills add wasp-lang/wasp --skill crossposting -a claude-code`. Or copy the skill folder (web/.claude/skills/crossposting in wasp-lang/wasp) into .claude/skills/crossposting in your project. Claude Code loads it when a task matches its description.

How do I install Crossposting in Codex?

Run `npx skills add wasp-lang/wasp --skill crossposting -a codex`. Or copy the skill folder (web/.claude/skills/crossposting in wasp-lang/wasp) into .agents/skills/crossposting in your project. Codex loads it when a task matches its description.

Can I use Crossposting in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add wasp-lang/wasp --skill crossposting -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/crossposting, .gemini/skills/crossposting, .github/skills/crossposting and .opencode/skills/crossposting in your project.

What does Crossposting need to run?

Going by SKILL.md and its folder, Crossposting needs TypeScript and JavaScript for the scripts in its folder, the command-line tools its instructions call (npx) and credentials named DEVTO_API_KEY and YOUTUBE_CLIENT_SECRET. Our summary lists: Node.js; A credential in DEVTO_API_KEY; A credential in YOUTUBE_CLIENT_SECRET.

Does Crossposting access the network?

SKILL.md names 2 domains. In commands or code: medium.com; the agent is likely to contact it when it follows the instructions. As links in the text: dev.to. This is read from the text; nothing was executed.

Is Crossposting safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Crossposting use?

Crossposting is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Crossposting use?

About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Crossposting?

Skills that share tags, products or a category with Crossposting: Markitdown (ImCa0/just-laws, 781 stars), Add Related Resources (pingcap/docs, 616 stars), Lecture To Md (ysyecust/lecture-to-notes, 270 stars) and Gbro Series Vocab (pyang5166/gbro-series-vocab, 162 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Crossposting?

wasp-lang (a GitHub organization) maintains it in wasp-lang/wasp, which has 18,762 GitHub stars. The repository holds 4 skills in this directory. The repository was last updated on October 7, 2026.

Source: wasp-lang/wasp on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Crossposting

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

MDX Conversion Script

YouTube Setup (one-time, human steps)

Crossposting to Dev.to

Crossposting to Medium

Steps

1. Convert the MDX article

2. Navigate to https://medium.com/new-story

3. Set the article title

4. Paste the article body

5. Verify

6. Before Publishing (human steps)

Files

Compare with similar skills

Similar skills

More from wasp-lang/wasp

Related

Questions about Crossposting

2. Navigate to `https://medium.com/new-story`