# Can Claude Code write a free-software release post for Mastodon with the right hashtags?

> Source: https://tareno.co/agents/claude-code/mastodon
> Language: en
> Last reviewed: 2026-10-24
> Use Claude Code with Tareno to turn release notes and the license file into a Mastodon release post with readable hashtags and a counted length, saved as a draft you approve in Tareno.

## Connection facts

| Field | Value |
| --- | --- |
| Product surface | Claude Code (claude-plugin:claude-code) |
| Available connection | Published plugin |
| Connection evidence | tested |
| Methods | plugin, mcp |
| Authentication | oauth |
| Setup | [Setup guide](https://tareno.co/docs/plugins/claude) |
| Install or connect | [Open setup](https://tareno.co/docs/plugins/claude) |
| Evidence observed | 2026-10-21 |
| Facts reviewed | 2026-10-25 |

Publication status and a working connection are separate facts. Evidence for one product surface does not establish installation or compatibility in another surface.

Agent: Claude Code · Network: Mastodon · Hub: [Claude Code and Tareno](https://tareno.co/agents/claude-code)

## Short answer

**Can Claude Code write a Mastodon release post for my free-software project?**

Yes. Claude Code reads the release notes, the license and the diff, writes a Mastodon post that states what changed and the license, counts the length against your server's limit, adds readable hashtags and saves a draft through Tareno. It cannot read the replies. Scheduling stays pending until you approve it in Tareno.

Free-software projects have a particular home on Mastodon: maintainers, packagers and users who care about licenses and who read release announcements closely. A good announcement there states the license, says what changed for packagers and users and avoids marketing language. Claude Code can verify these details in the repository before they go into a post: the license file, the version in the package manifest, the changelog entry. This page follows a maintainer of a small command-line tool through a release post, with the checks that the audience expects, the hashtag habits that Mastodon readers appreciate and the reminder that a server's character limit is its own.

## Example: a maintainer announces a minor release of a file-sync tool

Imagine a maintainer releasing version 1.6 of a file-sync tool under the GPL. She asks Claude Code to read the changelog, the package manifest and the license file and to write a post. Claude Code confirms the version in the manifest matches the tag, notes that the license file says GPL-3.0-or-later while the README says GPL-3.0, and asks which is right. After she fixes the README, it writes a post of 380 characters with the version, the two changes packagers care about and the license, adds three hashtags in capitalized words and saves it with `create_drafts` for her Mastodon account.

## Step by step

1. **Let Claude Code read the release.** Point it at the tag, the changelog and the package manifest. It checks that the version in the manifest, the tag and the notes agree.
2. **Check the license statements.** Ask it to compare the license file with the README and the source headers. Free-software readers notice a mismatch, and a post that repeats it spreads the error.
3. **Write for packagers and users.** Request a post that states the version, the changes that affect packagers, such as new dependencies, and the license, in plain language and without marketing words.
4. **Count against your server.** Mastodon's documentation says limits are set per server, with 500 characters as the example and every link counting as 23. Tell Claude Code your server's limit and ask for a count.
5. **Add readable hashtags.** Ask for hashtags in capitalized words, such as FreeSoftware or OpenSource, so screen readers can read them. Keep them few and relevant.
6. **Save, request and approve.** Claude Code confirms the account with `list_accounts` and saves the post through `create_drafts`. Give a day, a time and an IANA time zone, and approve the request in the Tareno dashboard.

## Prompts to copy

### Check version and license

```text
Compare the version in the package manifest, the latest git tag and the changelog heading, and compare the license in LICENSE, the README and the source file headers. List every mismatch with the file and line, and do not write the post until I have fixed them.
```

### Find what packagers need

```text
From the diff between the last tag and this one, list the changes that matter to people who package the tool: new or removed dependencies, changed build steps, renamed files and changed default paths. Mark which of them are not mentioned in the changelog.
```

### Write the post

```text
Write a Mastodon release post for Tareno that states version 1.6, the two changes packagers need to know and the license, with three hashtags written in capitalized words. Keep it within 450 characters, counting each link as 23, and avoid words such as revolutionary.
```

### Save the draft

```text
Use Tareno to confirm my Mastodon account [handle@server] and save the approved text as a draft. Return the draft ID and the text, and do not request a time until I give you the day and the time zone.
```

## Mastodon in Tareno

- Mastodon's documentation says character limits are configured per server, with 500 characters and 23 characters per link as the example, so confirm your own server before relying on a count.
- Tareno's configuration for Mastodon allows 500 characters of text with hashtags and mentions, and gives links an automatic preview, which shows the release page's title.
- Tareno does not read posts or replies on Mastodon, so packagers' questions under the post are read and answered in the app.
- Mastodon's documentation says a scheduled post must be at least 5 minutes ahead, so a release post can be queued shortly before the tag is public.

Official rules ([Mastodon documentation: statuses and instance configuration](https://docs.joinmastodon.org/methods/statuses/), checked 2026-10-24):

- Character and media limits are set by each server, not by Mastodon itself. The documentation's example server allows 500 characters and 4 attachments, and counts every link as 23 characters.
- A scheduled status must lie at least 5 minutes in the future, and a poll cannot be combined with media attachments.
- Visibility can be public, unlisted, private (followers only) or direct, and a content warning can be set with spoiler text.

## Mistakes to avoid

- Repeating a license mismatch. Fix the README before the post.
- Using marketing words. This audience reads for facts about dependencies and licenses.
- Writing hashtags as one lowercase word. Capitalize each word.
- Posting before the tag is public. A link to a release that does not exist yet is a bad first impression.

## What does not work

- Claude Code cannot know your server's character limit unless you tell it, and the limit is set by each server.
- It cannot read replies on Mastodon through Tareno, because Tareno does not expose posts or replies for Mastodon.
- It cannot publish the post on its own, since a time request becomes a post only after you approve it in the Tareno dashboard.

## Frequently asked questions

### Why check the license before the post?

Because readers in free-software circles check it. Claude Code compares the license file, the README and the source headers, so the post states the license you actually ship and no mismatch is repeated.

### How are links counted on Mastodon?

On the documentation's example server, every link counts as 23 characters regardless of length. Servers can be configured differently, so tell Claude Code your server's rule and let it count.

### Should I tag the post with hashtags?

A few relevant ones help discovery on Mastodon, where hashtags are the main way to find posts. Write them in capitalized words, and check your server's rules for any limits on promotional tags.

### Can Claude Code answer questions from packagers?

No. Tareno does not read replies on Mastodon and has no tool that posts one. You read and answer in the app, and Claude Code can help draft answers if you paste the question.

### Can the post include an image?

Yes, up to four in Tareno's configuration, each with a description. For a release a screenshot is optional; a plain post with the changes and the link often serves this audience better.

### Will the release post go live without my approval?

No. A scheduling request becomes a pending action in Tareno, and Mastodon receives the post only after you approve it in the dashboard. `get_action_status` shows what happened afterwards.

## Tareno tools used

- `list_accounts`
- `create_drafts`
- `get_action_status`

Approval model: Tareno saves drafts directly. Scheduling, publishing, edits to scheduled posts and deletions become pending actions that a person approves in the Tareno dashboard; no agent can approve them.

## Related

- [Claude Code × Tareno overview](https://tareno.co/agents/claude-code)
- [Post scheduling](https://tareno.co/features/post-scheduling)
- [Approval workflows](https://tareno.co/features/approval-workflows)
- [Content boards](https://tareno.co/features/content-boards)
- [Claude setup guide](https://tareno.co/docs/plugins/claude)
- Use case: [Generate posts from a code repository without publishing a secret](https://tareno.co/agents/use-cases/posts-from-your-code-repository)