Internal Communications Writer
anthropics/skills
A set of resources to help me write all kinds of internal communications, using the formats that my company likes to use. Claude should use this skill…
Audit newsletter subscriptions: block unwanted senders, unsubscribe from mailing lists, and enable AI summaries for worth-keeping ones.
Install Spark Recipe Newsletter Cleanup
$ npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install readdle/spark-cli-skills spark-recipe-newsletter-cleanup --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/readdle/spark-cli-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/recipe-newsletter-cleanup .claude/skills/spark-recipe-newsletter-cleanup && rm -rf skills-srcUse ~/.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/
Install the "spark-recipe-newsletter-cleanup" agent skill from https://github.com/readdle/spark-cli-skills/tree/main/skills/recipe-newsletter-cleanup into .claude/skills/spark-recipe-newsletter-cleanup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "spark-recipe-newsletter-cleanup", 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 install https://github.com/readdle/spark-cli-skills/tree/main/skills/recipe-newsletter-cleanupType 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.
$ npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install readdle/spark-cli-skills spark-recipe-newsletter-cleanup --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/readdle/spark-cli-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/recipe-newsletter-cleanup .agents/skills/spark-recipe-newsletter-cleanup && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "spark-recipe-newsletter-cleanup" agent skill from https://github.com/readdle/spark-cli-skills/tree/main/skills/recipe-newsletter-cleanup into .agents/skills/spark-recipe-newsletter-cleanup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "spark-recipe-newsletter-cleanup", 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.
$ npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install readdle/spark-cli-skills spark-recipe-newsletter-cleanup --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/readdle/spark-cli-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/recipe-newsletter-cleanup .cursor/skills/spark-recipe-newsletter-cleanup && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "spark-recipe-newsletter-cleanup" agent skill from https://github.com/readdle/spark-cli-skills/tree/main/skills/recipe-newsletter-cleanup into .cursor/skills/spark-recipe-newsletter-cleanup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "spark-recipe-newsletter-cleanup", 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 https://github.com/readdle/spark-cli-skills.git --path skills/recipe-newsletter-cleanup--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install readdle/spark-cli-skills spark-recipe-newsletter-cleanup --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/readdle/spark-cli-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/recipe-newsletter-cleanup .gemini/skills/spark-recipe-newsletter-cleanup && rm -rf skills-srcUse ~/.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/
Install the "spark-recipe-newsletter-cleanup" agent skill from https://github.com/readdle/spark-cli-skills/tree/main/skills/recipe-newsletter-cleanup into .gemini/skills/spark-recipe-newsletter-cleanup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "spark-recipe-newsletter-cleanup", 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.
$ gh skill install readdle/spark-cli-skills spark-recipe-newsletter-cleanupInstalls 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).
$ npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/readdle/spark-cli-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/recipe-newsletter-cleanup .github/skills/spark-recipe-newsletter-cleanup && rm -rf skills-srcUse ~/.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/
Install the "spark-recipe-newsletter-cleanup" agent skill from https://github.com/readdle/spark-cli-skills/tree/main/skills/recipe-newsletter-cleanup into .github/skills/spark-recipe-newsletter-cleanup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "spark-recipe-newsletter-cleanup", 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.
$ npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install readdle/spark-cli-skills spark-recipe-newsletter-cleanup --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/readdle/spark-cli-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/recipe-newsletter-cleanup .opencode/skills/spark-recipe-newsletter-cleanup && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "spark-recipe-newsletter-cleanup" agent skill from https://github.com/readdle/spark-cli-skills/tree/main/skills/recipe-newsletter-cleanup into .opencode/skills/spark-recipe-newsletter-cleanup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "spark-recipe-newsletter-cleanup", 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
spark-recipe-newsletter-cleanup- GitHub stars
- 149
- Token cost
- ~583 tokens
- SKILL.md length
- 227 words
- Files
- 1
- Skills in repo
- 34
- Repo updated
- First seen
- Licence
- MIT
At a glance
Audit newsletter subscriptions: block unwanted senders, unsubscribe from mailing lists, and enable AI summaries for worth-keeping ones.
- Works in 5 steps: List all newsletters → Review individual newsletters → Remove unwanted subscriptions → …
- Tasks that involve Newsletters
- SKILL.md covers Steps and Tips
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Spark Recipe Newsletter Cleanup is an agent skill from readdle/spark-cli-skills. Audit newsletter subscriptions: block unwanted senders, unsubscribe from mailing lists, and enable AI summaries for worth-keeping ones.
Its SKILL.md is about 580 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Writing & Content, covering Newsletters. The licence is MIT.
When your agent uses it
- Tasks that involve Newsletters
Example prompts
- “/spark-recipe-newsletter-cleanup”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit cb20383. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Spark Recipe Newsletter Cleanup loads about 583 tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 227 words of instructions outside code blocks.
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); files beside SKILL.md are not scanned.
SKILL.md
The full file from readdle/spark-cli-skills at commit cb20383, republished under its MIT licence (© readdle). 227 words, ~583 tokens.
Download SKILL.mdSave it as
.claude/skills/spark-recipe-newsletter-cleanup/SKILL.md (or your agent's skills folder).- name
- spark-recipe-newsletter-cleanup
- description
- Audit newsletter subscriptions: block unwanted senders, unsubscribe from mailing lists, and enable AI summaries for worth-keeping ones.
- metadata.version
- 1.0.0
Recipe: Newsletter Cleanup
Audit and prune newsletter subscriptions. Block the unwanted, unsubscribe from the noisy, and enable AI summaries for the ones worth keeping.
Prerequisite: Read the use-spark base skill for command reference and filter syntax.
Access level required: triage.
Steps
Step 1: List all newsletters
spark emails Inbox --filter "category:newsletter"Review the senders. Look for patterns: senders the user never reads, duplicates, or obsolete subscriptions.
Step 2: Review individual newsletters
For each sender the user wants to evaluate:
spark thread <id>Step 3: Remove unwanted subscriptions
For mailing lists with an unsubscribe mechanism:
spark action unsubscribe <id>For senders that should be blocked entirely:
spark contact-action blockContact spammer@example.comTo block an entire domain:
spark contact-action blockDomain example.comStep 4: Enable AI summaries for keepers
For newsletters the user wants to keep but not read in full:
spark contact-action enableAutosummaryForContact newsletter@example.comStep 5: Group repetitive senders
For senders that send frequently, group their emails to reduce inbox clutter:
spark contact-action groupEmailsFromContact sender@example.comTips
- Start with
spark emails Inbox --filter "category:newsletter" --page-size 50to see a broad list of senders. - Ask the user which senders they actually read before blocking anything.
unsubscribeworks through the mailing list's unsubscribe mechanism - it's cleaner than blocking.blockContactstops all future mail from appearing;blockDomainis more aggressive.- Auto-summary generates a brief AI summary at the top of each email from that sender - great for digests.
- Grouping (
groupEmailsFromContact) collapses repeated messages from the same sender into a single entry. - Run this recipe periodically (monthly) to keep the newsletter list pruned.
© readdle, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/recipe-newsletter-cleanup of readdle/spark-cli-skills.
Open the folder on GitHubat commit cb20383
Compare with similar skills
Spark Recipe Newsletter Cleanup 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Spark Recipe Newsletter Cleanup this skillreaddle/spark-cli-skills | 149 | — | ~583 | Automated safety check: Pass | MIT | |
| Internal Communications Writeranthropics/skills | 180k | 38 repos | ~378 | Automated safety check: Pass | Apache-2.0 | |
| Clarityaddyosmani/clarity | 269 | 1 repos | ~1.9k | Automated safety check: Pass | MIT | |
| News Aggregator Skillcclank/news-aggregator-skill | 1.3k | — | ~2.1k | Automated safety check: Pass | None | |
| Changelog Social RecapFlorianBruniaux/claude-code-ultimate-guide | 6.1k | — | ~1.8k | Automated safety check: Notes | CC-BY-SA-4.0 | |
| Newsletter Voicecharlie947/social-media-skills | 3.8k | — | ~2.5k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Spark Recipe Newsletter Cleanup
What does Spark Recipe Newsletter Cleanup do?
Audit newsletter subscriptions: block unwanted senders, unsubscribe from mailing lists, and enable AI summaries for worth-keeping ones. Spark Recipe Newsletter Cleanup is an agent skill from readdle/spark-cli-skills. Audit newsletter subscriptions: block unwanted senders, unsubscribe from mailing lists, and enable AI summaries for worth-keeping ones.
When should I use Spark Recipe Newsletter Cleanup?
Spark Recipe Newsletter Cleanup fits situations like: tasks that involve Newsletters.
How do I install Spark Recipe Newsletter Cleanup in Claude Code?
Run `npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a claude-code`. Or copy the skill folder (skills/recipe-newsletter-cleanup in readdle/spark-cli-skills) into .claude/skills/spark-recipe-newsletter-cleanup in your project. Claude Code loads it when a task matches its description.
How do I install Spark Recipe Newsletter Cleanup in Codex?
Run `npx skills add readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a codex`. Or copy the skill folder (skills/recipe-newsletter-cleanup in readdle/spark-cli-skills) into .agents/skills/spark-recipe-newsletter-cleanup in your project. Codex loads it when a task matches its description.
Can I use Spark Recipe Newsletter Cleanup 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 readdle/spark-cli-skills --skill spark-recipe-newsletter-cleanup -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/spark-recipe-newsletter-cleanup, .gemini/skills/spark-recipe-newsletter-cleanup, .github/skills/spark-recipe-newsletter-cleanup and .opencode/skills/spark-recipe-newsletter-cleanup in your project.
What does Spark Recipe Newsletter Cleanup need to run?
SKILL.md names no scripts, command-line tools or credentials: Spark Recipe Newsletter Cleanup is instructions for the agent only.
Does Spark Recipe Newsletter Cleanup access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Spark Recipe Newsletter Cleanup 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. Review the folder before installing.
What licence does Spark Recipe Newsletter Cleanup use?
Spark Recipe Newsletter Cleanup 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 Spark Recipe Newsletter Cleanup use?
About 583 tokens (SKILL.md is roughly 2.3k 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 Spark Recipe Newsletter Cleanup?
Skills that share tags, products or a category with Spark Recipe Newsletter Cleanup: Internal Communications Writer (anthropics/skills, 180k stars), Clarity (addyosmani/clarity, 269 stars), News Aggregator Skill (cclank/news-aggregator-skill, 1.3k stars) and Changelog Social Recap (FlorianBruniaux/claude-code-ultimate-guide, 6.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Spark Recipe Newsletter Cleanup?
readdle (a GitHub organization) maintains it in readdle/spark-cli-skills, which has 149 GitHub stars. The repository holds 34 skills in this directory. The repository was last updated on October 7, 2026.
Source: readdle/spark-cli-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.