# Can Codex write a Bluesky thread that walks through a small algorithm with verified output?

> Source: https://tareno.co/agents/codex/bluesky
> Language: en
> Last reviewed: 2026-10-24
> Use Codex with Tareno to write a Bluesky thread that walks through a small algorithm step by step, with every output run and checked, saved as one draft you approve in Tareno.

## Connection facts

| Field | Value |
| --- | --- |
| Product surface | Codex (codex) |
| Available connection | Published plugin |
| Connection evidence | documented |
| Methods | plugin, mcp |
| Authentication | oauth |
| Setup | [Setup guide](https://tareno.co/docs/mcp/openai) |
| Install or connect | [Open setup](https://chatgpt.com/plugins/plugin_asdk_app_6a54fa8fd95c81918e64891984183432) |
| Evidence observed | 2026-10-27 |
| Facts reviewed | 2026-10-27 |

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

Agent: Codex · Network: Bluesky · Hub: [Codex and Tareno](https://tareno.co/agents/codex)

## Short answer

**Can Codex write a step-by-step code walkthrough thread for Bluesky and check each output?**

Yes. Codex writes a walkthrough in steps of up to 300 characters, runs the code for each step and shows the real output, then saves the whole thread as one draft through Tareno. Bluesky has no code formatting in Tareno, so snippets stay short. Scheduling stays pending until you approve it in Tareno.

Explaining an algorithm in public works best one step at a time, and a thread is the right shape: each post shows one line or one idea, and the reader scrolls through the logic. The danger is an output that was never run. A walkthrough with a wrong intermediate value teaches the wrong thing with great confidence. Codex can run each step as it writes it and paste the actual values, and Tareno saves the whole thread as one draft on Bluesky, which is the one network where it can. This page follows a teacher of algorithms through a binary-search walkthrough, with the step-by-step verification at its centre.

## Example: a computer-science teacher explains binary search

Imagine a teacher who wants a thread that explains binary search on a sorted list of nine numbers. She asks Codex to write the algorithm in Python, run it on the list and record the low, high and middle values at each step. Codex finds that for her example the search needs three steps, and drafts a thread of five posts: the idea, step one with its values, step two, step three, and the complexity. It shows the actual output beside each post. It notes that plain text cannot show indentation reliably, saves the thread as one draft with `create_drafts`, and she corrects one wording.

## Step by step

1. **Choose a small algorithm and an example.** Pick one that fits in a handful of steps, with an example list or input that shows every branch. A walkthrough that needs twenty steps will not be read to the end.
2. **Run it and record every step.** Ask Codex to run the code and print the intermediate values at each step. The thread uses those values, not values reasoned out in prose.
3. **Keep snippets to a line.** Tareno's configuration for Bluesky has no formatting, so a snippet appears as plain text. Ask for one-line snippets, and describe longer logic in words.
4. **Write one post per step.** Request a root post with the idea and one reply per step, each within 300 characters, with the verified values in the text. Tareno saves up to 24 replies after the root.
5. **Save the thread as one draft.** Codex confirms the account with `list_accounts` and saves the thread through `create_drafts` in one call. Open the draft in Tareno and read it top to bottom as a learner would.
6. **Request a time and approve.** Give a day, a time and an IANA time zone. The request becomes a pending action, and you approve it in the Tareno dashboard.

## Prompts to copy

### Run and record

```text
Implement binary search in Python and run it on the sorted list [2, 5, 8, 12, 16, 23, 38, 56, 72] searching for 23. Print low, high and middle at every step and the final index, and show me the exact output. Do not write any post yet.
```

### Check the claims

```text
List every numeric claim you plan to make in the walkthrough, such as the number of steps and the complexity, with the output line or definition that supports it. Mark any claim that holds only for this example and not in general, so I can word it carefully.
```

### Write the thread

```text
Write a Bluesky thread for Tareno: a root post with the idea of binary search and one reply per step using the verified values, then a reply on complexity. Keep every post within 300 characters, keep snippets to one line, and give me the character count of each.
```

### Save the thread

```text
Use Tareno to confirm my Bluesky account [handle] and save the approved posts as one thread draft. Return the draft ID and the number of replies, and request no time until I give you the day and the time zone.
```

## Bluesky in Tareno

- Tareno saves a Bluesky thread as one draft of a root post and up to 24 replies, each up to 300 characters, which fits a walkthrough of up to about a dozen steps.
- Tareno's configuration for Bluesky has no formatting, so indentation and code blocks do not survive; one-line snippets are the practical limit.
- A screenshot of formatted code can carry what text cannot, and Tareno's configuration allows up to four images on a Bluesky post, but it needs alt text with the code in words.
- Tareno does not read posts or replies on Bluesky, so corrections from readers arrive in the app, and you handle them there.

Official rules ([AT Protocol lexicons: app.bsky.feed.post and app.bsky.embed](https://github.com/bluesky-social/atproto/tree/main/packages/api/lexicons/app/bsky), checked 2026-10-25):

- Post text is limited to 300 graphemes and 3,000 bytes, so an emoji counts as one grapheme but can use several bytes.
- A post can embed up to 4 images, each up to 2,000,000 bytes.
- Video embeds accept MP4 up to 300,000,000 bytes, with up to 20 caption files in WebVTT. Tareno's configuration is stricter: one MP4 of up to 180 seconds and 100 MB.

## Mistakes to avoid

- Reasoning out an intermediate value. Run the code and paste what it prints.
- Generalizing from one example. State that a result holds for this input.
- Pasting multi-line code. Plain text loses indentation, so describe the logic or use an image.
- Leaving out the complexity caveat. State when the claim assumes a sorted list.

## What does not work

- Codex cannot show formatted code in a Bluesky post through Tareno, because the configuration has no formatting.
- It cannot read replies to the thread on Bluesky, because Tareno does not expose posts or replies for Bluesky.
- It cannot publish the thread on its own, since a time request becomes a thread only after you approve it in the Tareno dashboard.

## Frequently asked questions

### Why have Codex run the code for each step?

Because intermediate values are where walkthroughs go wrong. Codex prints the values at every step and the thread uses them directly, so what you teach is what the program actually did.

### Can the thread show indented code?

Not as text. Tareno's configuration for Bluesky has no formatting, so indentation is lost. Use one-line snippets, describe the structure in words or attach a screenshot with alt text that states the code.

### How many steps can a walkthrough have?

A root plus up to 24 replies, each up to 300 characters. A walkthrough works best at five to eight posts. If an algorithm needs more, split it into two threads.

### Does Bluesky support threads in other tools like Tareno?

In Tareno it is the one network where a thread is saved as a single draft. For other networks the tools store one post at a time, so a walkthrough there has to be posted by hand.

### Can Codex answer questions under the thread?

No. Tareno does not read replies on Bluesky and has no tool that posts one. Readers' questions are yours to read and answer in the app, and Codex can help you draft explanations to paste.

### Will the thread appear without my approval?

No. A scheduling request becomes a pending action in Tareno, and Bluesky receives the thread 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

- [Codex × Tareno overview](https://tareno.co/agents/codex)
- [Post scheduling](https://tareno.co/features/post-scheduling)
- [Approval workflows](https://tareno.co/features/approval-workflows)
- [Content boards](https://tareno.co/features/content-boards)
- [Codex and ChatGPT setup](https://tareno.co/docs/mcp/openai)
- Use case: [Turn long writing into a Bluesky thread that saves as one draft](https://tareno.co/agents/use-cases/threads-from-long-writing)