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.
npx skills add tang-vu/social-posting-skills --skill post-threadsgit clone --depth 1 https://github.com/tang-vu/social-posting-skillsWrote 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.
[](https://agentmods.dev/skills/tang-vu/social-posting-skills/post-threads)<a href="https://agentmods.dev/skills/tang-vu/social-posting-skills/post-threads"><img src="https://agentmods.dev/badge/skills/tang-vu/social-posting-skills/post-threads/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.
<a href="https://agentmods.dev/skills/tang-vu/social-posting-skills/post-threads"><img src="https://agentmods.dev/badge/skills/tang-vu/social-posting-skills/post-threads.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00012 | $0.01755 |
| Opus 5 | $0.00006 | $0.00877 |
| Sonnet 5 | $0.00002 | $0.00351 |
| Haiku 4.5 | $0.00001 | $0.00176 |
Grade A, and why
post-threads 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 11d ago.
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.
How it starts
The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Threads Posting Skill
Platform Overview
Threads (by Meta) is Instagram's text-based companion app. It focuses on short-form, conversational content. Think of it as Instagram meets Twitter — casual, visual-friendly, and community-driven. 200M+ monthly active users and growing rapidly.
Platform Constraints
- Character Limit: 500 characters per direct post
- Text Attachments: Up to 10,000 characters (expandable media, added Sep 2025)
- Media: Up to 10 images per post
- Video: Up to 3 minutes (MP4, MOV formats)
- Links: Displayed as preview cards
- Topic Tags: Use relevant topic tags (not hashtags) for discovery
- Threads: Reply chains for longer content
- Reposts: Share others' posts with added commentary
- Bio Links: Up to 5 links in bio (added May 2025)
New Features (2025)
- Reply Approvals: Control who can reply to your posts
- Comment Filters: New tools to manage comments
- Ghost Posts: Disappearing posts feature (Oct 2025)
- Group DMs: Group direct messaging
- Fediverse Feed: Integration with Mastodon and federated networks
- Ads: Ads now appear in the "For You" feed
- Video Player: Improved with pause, play, skip, and progress bar
Link Placement Strategy
DEFAULT: Put links in a REPLY to your own post, not in the main post body.
- Threads algorithm deprioritizes posts with external links in the body
- Link-heavy posts get reduced distribution in the "For You" feed
- Best strategy: Post text-only content, then reply to your own post with the link
- Links in the main post will show as preview cards but hurt organic reach
- Keep the main post conversational and authentic -- save links for replies
Posting Steps (Browser Automation)
Single Post
- Navigate to
https://www.threads.net/ - Wait for the home page to load (must be logged in)
- Click on the "Start a thread..." composer area or the compose button
- Wait for the composer to open
- Type the post content (ASCII English only, max 500 chars)
- Click "Post" button
- Verify post appears on your profile
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.
- 11d ago First seen · 185 lines · 12 tokens per session scan A 2a53209a0cb7
post-threads is a skill published in the GitHub repository tang-vu/social-posting-skills (9 stars, last pushed 6mo ago), licensed MIT. It adds 12 tokens to every session and 1,755 once invoked, about $0.0001 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 2026-08-31.
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