A guide for posting to Reddit, a network of topic-based communities called subreddits. It explains account requirements and ways to participate without being treated as spam.

Use it when preparing Reddit posts or comments, choosing suitable communities, building participation history, or checking whether an account is ready to share links.

It helps avoid automatic removals caused by low account age, low karma, subreddit rules, or poorly placed external links.

post-reddit — Skill for Claude Code and Codex by tang-vu

Install

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.

Any agent

npx skills add tang-vu/social-posting-skills --skill post-reddit

Clone the repo

git clone --depth 1 https://github.com/tang-vu/social-posting-skills

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/tang-vu/social-posting-skills/post-reddit/github.svg)](https://agentmods.dev/skills/tang-vu/social-posting-skills/post-reddit)

Your own site

<a href="https://agentmods.dev/skills/tang-vu/social-posting-skills/post-reddit"><img src="https://agentmods.dev/badge/skills/tang-vu/social-posting-skills/post-reddit/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/tang-vu/social-posting-skills/post-reddit"><img src="https://agentmods.dev/badge/skills/tang-vu/social-posting-skills/post-reddit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 549 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00021	$0.00549
Opus 5.5	$0.00008	$0.00220
Sonnet 5.5	$0.00004	$0.00110
Haiku 4.5	$0.00002	$0.00055

Measured 1mo ago against content hash eacf662cf0c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

post-reddit 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 1mo 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.

.agents/skills/post-reddit/SKILL.md · 55 lines

How it starts

The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Reddit Adapter

Facts live in platforms/reddit.json (300-char title, 40k body, media). The subreddit target is part of the constraint set — its rules win.

What Reddit rewards (culture)

Community membership first. Accounts that only self-promote get filtered and downvoted. Reddit's spam filters are real: new/low-karma accounts get posts auto-removed, link posts especially.
"I built X because Y" over "Check out X". Transparent, specific, humble.
Real numbers and honest tradeoffs; Redditors punish marketing voice fast.
Asking for feedback works. Asking for upvotes violates the rules.

Drafting from the content graph

core-claim → plain, specific title (no clickbait, no emoji).
context → opening paragraph: what it is, why you made it.
proof/technical → bulleted substance; technical details welcome.
cta → "feedback welcome" tone, not growth-CTA tone.
Link → commonly placed in a first comment (heuristic; subreddit rules and account standing decide — when in doubt, text-only + link comment).
Always: pick the subreddit deliberately, READ its rules and flair requirements, and say so in the preview. r/SideProject and r/sideprojects are different subreddits with different rules.

Publishing

manual → draft package (title, body, first comment, target sub).
agent-browser → playbook navigates to /r/{sub}/submit, handles the text-post form and flair picker. If the required flair is unclear → abort and ask; never guess a flair.
api → official API exists (OAuth); adapter not implemented.

After publishing through the browser, CHECK REMOVAL: view the post logged out. If a platform filter removed it, record failed and advise the user — the fix is account standing/subreddit fit, not reposting.

Genuine engagement

Reply to every comment on your post with real answers.
Participate in the subreddit because you're a member, not a campaign.
Never cross-post identical text to many subs; never ask for upvotes.

Read the full file on GitHub · 55 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

skill.json 657 B

Changes

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.

1mo ago Changed · -163 lines · +12 tokens per session eacf662cf0c6
1mo ago First seen · 218 lines · 9 tokens per session scan A 32c8f24ade97

Subscribe to this mod's changes

post-reddit is a skill published in the GitHub repository tang-vu/social-posting-skills (12 stars, last pushed 22d ago), licensed MIT. It adds 21 tokens to every session and 549 once invoked, about $0.0001 per session on Opus 5.5. 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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post-reddit