Platform Arbitrage
acogood/diffmode_free
Platform arbitrage audit for a founder's product — a Diffmode growth-tactics think-tank research stage (prompt TT-DG-003).
When the user wants to promote via forums, communities, or invite users to join a community.
MITAuto-check passed
Install Community Forum
$ npx skills add kostja94/marketing-skills --skill community-forum -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install kostja94/marketing-skills community-forum --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/kostja94/marketing-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/channels/community/community-forum .claude/skills/community-forum && 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 "community-forum" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/channels/community/community-forum into .claude/skills/community-forum/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "community-forum", 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/kostja94/marketing-skills/tree/main/skills/channels/community/community-forumType 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 kostja94/marketing-skills --skill community-forum -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install kostja94/marketing-skills community-forum --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/channels/community/community-forum .agents/skills/community-forum && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "community-forum" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/channels/community/community-forum into .agents/skills/community-forum/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "community-forum", 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 kostja94/marketing-skills --skill community-forum -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install kostja94/marketing-skills community-forum --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/channels/community/community-forum .cursor/skills/community-forum && 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 "community-forum" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/channels/community/community-forum into .cursor/skills/community-forum/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "community-forum", 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/kostja94/marketing-skills.git --path skills/channels/community/community-forum--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 kostja94/marketing-skills --skill community-forum -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install kostja94/marketing-skills community-forum --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/channels/community/community-forum .gemini/skills/community-forum && 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 "community-forum" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/channels/community/community-forum into .gemini/skills/community-forum/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "community-forum", 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 kostja94/marketing-skills community-forumInstalls 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 kostja94/marketing-skills --skill community-forum -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/channels/community/community-forum .github/skills/community-forum && 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 "community-forum" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/channels/community/community-forum into .github/skills/community-forum/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "community-forum", 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 kostja94/marketing-skills --skill community-forum -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install kostja94/marketing-skills community-forum --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/kostja94/marketing-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/channels/community/community-forum .opencode/skills/community-forum && 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 "community-forum" agent skill from https://github.com/kostja94/marketing-skills/tree/main/skills/channels/community/community-forum into .opencode/skills/community-forum/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "community-forum", 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
community-forum- GitHub stars
- 1k
- Token cost
- ~2k tokens
- SKILL.md length
- 858 words
- Files
- 1
- Skills in repo
- 102
- Repo updated
- First seen
- Licence
- MIT
At a glance
When the user wants to promote via forums, communities, or invite users to join a community.
- Works in 3 steps: Goal: Leads, community growth, brand… → Platform fit: Indie Hacker, HN, Reddit,… → Timeline: One-time launch vs sustained…
- Wants to promote via forums
- SKILL.md covers Initial Assessment, Forum Types, Discourse (Self-Hosted Forum)… and Hacker News Launch, plus 7 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Community Forum is an agent skill from kostja94/marketing-skills. When the user wants to promote via forums, communities, or invite users to join a community. Also use when the user mentions "forum promotion," "Indie Hacker," "Hacker News," "community growth," "Discord promotion," "vertical community," "brand encyclopedia," "Wikipedia," "Quora," "Reddit community," "community building," "forum marketing," or "community invite." For Reddit copy, use reddit-posts. For strategy, use integrated-marketing.
Its SKILL.md is about 2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with Reddit, Discord and Wikipedia. The repository describes itself as: Agent Skills for Marketing — SEO, Social, Influencer & More. 160+ open-source skills for SEO, content, 40+ page types, paid ads, channels, and strategies. Add project context… The licence is MIT.
When your agent uses it
- Wants to promote via forums
- Invite users to join a community
- The user mentions forum promotion
- Community growth
Example prompts
- “forum promotion,”
- “Indie Hacker,”
- “Hacker News,”
- “/community-forum”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Goal: Leads, community growth, brand awareness
- Platform fit: Indie Hacker, HN, Reddit, Discord, vertical forums
- Timeline: One-time launch vs sustained (4-6 months for Indie Hackers)
What it can do on your machine
Read from SKILL.md and the folder at commit 8dd89c5. 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.
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
Community Forum loads about 2k tokens when it runs. Until then it costs about 114 tokens; SKILL.md has 858 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 kostja94/marketing-skills at commit 8dd89c5, republished under its MIT licence (© kostja94). 858 words, ~2,013 tokens.
Download SKILL.mdSave it as
.claude/skills/community-forum/SKILL.md (or your agent's skills folder).- name
- community-forum
- description
- When the user wants to promote via forums, communities, or invite users to join a community. Also use when the user mentions "forum promotion," "Indie Hacker," "Hacker News," "community growth," "Discord promotion," "vertical community," "brand encyclopedia," "Wikipedia," "Quora," "Reddit community," "community building," "forum marketing," or "community invite." For Reddit copy, use reddit-posts. For strategy, use integrated-marketing.
- metadata.version
- 1.1.1
Channels: Community & Forum Promotion
Guides forum promotion, community invitation, and vertical community marketing. Community-led growth (CLG) costs ~90% less than paid acquisition with ~3.2x higher customer LTV. Indie Hackers delivers ~23% conversion vs Product Hunt ~3%; HN and Reddit require sustained engagement. For cold start planning (first users, launch channels), see cold-start-strategy. For indie hacker strategy (first 100 users, Build in Public content framework, Indie Hackers tactics), see indie-hacker-strategy.
When invoking: On first use, if helpful, open with 1-2 sentences on what this skill covers and why it matters, then provide the main output. On subsequent use or when the user asks to skip, go directly to the main output.
Initial Assessment
Project context: Read root contextus.md when present and load only the modules relevant to this task. Without Contextus, use available project material or user-provided facts and ask for missing information; do not create a parallel context system.
Identify:
- Goal: Leads, community growth, brand awareness
- Platform fit: Indie Hacker, HN, Reddit, Discord, vertical forums
- Timeline: One-time launch vs sustained (4-6 months for Indie Hackers)
Forum Types
| Platform | Audience | Use |
|---|---|---|
| Indie Hacker | Indie makers, founders | Sustained engagement; authentic journey posts; ~23% conversion vs PH 3% |
| Hacker News | Tech, startups | Show HN launch; ~1,300 posts/day; front page = luck + timing |
| Hackernoon | Dev, tech readers | Content distribution |
| Industry forums | Niche verticals | Discount codes for leads; search "[industry] forum"; post event/activity promotion; see discount-marketing-strategy for code strategy |
| Subreddit-specific | See reddit-posts; 90/10 rule; 29+ posts for traction | |
| Discourse (self-hosted forum) | Community-specific | Owned forum; full SEO/GEO control; see Discourse SEO section below |
Discourse (Self-Hosted Forum) SEO
If you run a Discourse forum (or similar self-hosted forum), SEO/GEO considerations differ from posting on third-party platforms:
| Practice | Guideline |
|---|---|
| Guest access | Allow anonymous reading for categories meant to attract traffic; login-only mode severely limits indexed pages |
| Topic structure | First post carries SEO weight; write clear titles and substantive opening posts; avoid fragmented short topics |
| Sitemap & robots | Discourse generates sitemaps automatically; monitor in GSC as a separate property (subdomain or subdirectory) |
| Content quality | Merge duplicates, mark resolved threads, surface FAQ topics—forum-level quality signals affect crawl and citation |
| GEO | Structured topic titles and well-formed opening posts are extractable by AI tools; forum format with timelines and accepted answers lends credibility |
| Subdomain vs subdirectory | Discourse recommends subdomain for operational reasons; search engines do not inherently favor either for ranking—choose based on infrastructure, not SEO alone |
Hacker News Launch
| Practice | Guideline |
|---|---|
| Title | "Show HN: [Product] - [specific problem solved]"; honest, no clickbait |
| Timing | Tue-Thu; peak US hours; avoid weekends, Mon, Fri |
| First comment | Invitation to engage; product status (beta/MVP); differentiated solution; try-it link |
| Assets | Live demo, GIFs, screenshots, 30-60s demo video |
| Expectation | Traffic spike, not sustained growth; partly luck-dependent |
Indie Hackers Best Practices
- Sustained engagement: 4–6 months; not a one-time launch
- Content: Authentic journey posts; product "sprinkled within"; avoid heavy promotion
- Result: ~23% conversion vs Product Hunt ~3%; organic traffic from authentic sharing
For full Indie Hackers tactics, Build in Public content framework (40/30/20/10), first 100 users → indie-hacker-strategy.
Show full SKILL.md (360 more words)Show less
Community Invitation Tactics
| Channel | Method |
|---|---|
| Welcome email | Post-signup automation; 4x open, 5x CTR vs regular campaigns |
| Homepage CTA | Button, popup, banner; above-the-fold upgrade CTA |
| In-site placement | High-visibility areas; user-focused sections (e.g. dashboard, settings) |
| Banner | Homepage, carousel below hero |
| Registration emails | Success/confirmation email with community link |
| EDM campaign | Newsletter + banner, interview-for-membership |
| Discord | Post event/community info; founder engagement 2-3h/day |
| Vertical forums | Search "[industry] forum"; post event/activity promotion |
| Post-login form | In-app signup form shown after login; high-intent placement |
Welcome email best practices: One clear CTA per email; front-load value in subject; personalize (signup source, interests); link to best content, events; ask questions (~75% reply rate). Automated 2-4 email sequence.
Vertical Community Channels
| Principle | Guideline |
|---|---|
| Target | Find channels where target audience gathers |
| Niche over broad | Industry-specific subgroups; avoid mass posting |
| Caution | Mass posting risks removal; match community tone; choose wording carefully |
| Examples | Reddit subreddits, Discord servers, Quora, X, Hacker News, Stack Overflow, niche B2B communities |
| Regional | Large communities by locale—event/activity promotion; target vertical channels within each; see localization-strategy |
Community-led growth: Engage before promoting; build trust; contribute value first.
Natural Traffic (Complementary)
| Channel | Use |
|---|---|
| Hashtags | Social tag optimization |
| Facebook groups | Indirect referral |
| Giveaways | Attention and conversion |
Brand Basics (Encyclopedia, Q&A)
| Platform | Use |
|---|---|
| Wikipedia | Global; neutral, cited content; brand credibility |
| Quora | Q&A; brand discussion, thought leadership, long-term SEO |
| Stack Overflow | Tech/dev; expertise signals, backlinks |
| Regional | Local encyclopedias and Q&A by locale; verified credentials; see localization-strategy |
Wikipedia: Neutral language, credible references, no promotional content. Regional platforms require verified credentials; prioritize local search share. Free and sustainable; supports long-term conversion while search habits persist.
Output Format
- Forum selection and approach (HN vs IH vs industry)
- Community invitation plan (welcome email, CTA, banner, EDM, Discord)
- Vertical channel targeting
- Content strategy (authentic vs promotional mix)
- Timeline (launch vs sustained)
Related Skills
- reddit-posts: Reddit post copy, subreddit rules
- cold-start-strategy: Cold start orchestrates Product Hunt, Reddit, Indie Hackers, directories; this skill handles forum/community tactics
- indie-hacker-strategy: Indie hacker first 100 users; Build in Public; Indie Hackers tactics; this skill = forum/community tactics; indie-hacker = strategy + context
- directory-submission: Product Hunt, Taaft; different from forum community
- affiliate-marketing: Communities as recruitment channel
- top-banner-generator, popup-generator: Homepage CTA, banner
- newsletter-signup-generator: EDM, welcome email
- localization-strategy: Regional markets (local platforms by locale)
© kostja94, 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/channels/community/community-forum of kostja94/marketing-skills.
Open the folder on GitHubat commit 8dd89c5
Compare with similar skills
Community Forum 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 |
|---|---|---|---|---|---|---|
| Community Forum this skillkostja94/marketing-skills | 1k | — | ~2k | Automated safety check: Pass | MIT | |
| Platform Arbitrageacogood/diffmode_free | 163 | — | ~2.5k | Automated safety check: Pass | Apache-2.0 | |
| Social Media IntelligenceHKUDS/Vibe-Trading | 35k | — | ~10k | Automated safety check: Notes | MIT | |
| Community MarketingNexus-JPF/note-companion | 870 | 4 repos | ~2.2k | Automated safety check: Pass | MIT | |
| Community Seeding Planminhnv0807/ai-business-skills | 609 | — | ~3.2k | Automated safety check: Pass | MIT | |
| AI Search Optimizationsocial-media-skills/skills | 134 | — | ~2k | Automated safety check: Pass | MIT |
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Related
Questions about Community Forum
What does Community Forum do?
When the user wants to promote via forums, communities, or invite users to join a community. Community Forum is an agent skill from kostja94/marketing-skills. When the user wants to promote via forums, communities, or invite users to join a community.
When should I use Community Forum?
Community Forum fits situations like: wants to promote via forums; invite users to join a community; the user mentions forum promotion; community growth.
How do I install Community Forum in Claude Code?
Run `npx skills add kostja94/marketing-skills --skill community-forum -a claude-code`. Or copy the skill folder (skills/channels/community/community-forum in kostja94/marketing-skills) into .claude/skills/community-forum in your project. Claude Code loads it when a task matches its description.
How do I install Community Forum in Codex?
Run `npx skills add kostja94/marketing-skills --skill community-forum -a codex`. Or copy the skill folder (skills/channels/community/community-forum in kostja94/marketing-skills) into .agents/skills/community-forum in your project. Codex loads it when a task matches its description.
Can I use Community Forum 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 kostja94/marketing-skills --skill community-forum -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/community-forum, .gemini/skills/community-forum, .github/skills/community-forum and .opencode/skills/community-forum in your project.
What does Community Forum need to run?
SKILL.md names no scripts, command-line tools or credentials: Community Forum is instructions for the agent only.
Does Community Forum 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 Community Forum 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 Community Forum use?
Community Forum 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 Community Forum use?
About 2k tokens (SKILL.md is roughly 8.1k 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 Community Forum?
Skills that share tags, products or a category with Community Forum: Platform Arbitrage (acogood/diffmode_free, 163 stars), Social Media Intelligence (HKUDS/Vibe-Trading, 35k stars), Community Marketing (Nexus-JPF/note-companion, 870 stars) and Community Seeding Plan (minhnv0807/ai-business-skills, 609 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Community Forum?
kostja94 (a GitHub user) maintains it in kostja94/marketing-skills, which has 1,025 GitHub stars. The repository holds 102 skills in this directory. The repository was last updated on October 6, 2026.
Source: kostja94/marketing-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.