TimesFM Forecasting
google-research/timesfm
Forecasts any univariate time series zero-shot with Google's TimesFM model, returning point forecasts and calibrated prediction intervals without training.
A specialized skill for the hashtag-analyst agent covering hashtag science.
Install Hashtag Science
$ npx skills add revfactory/harness-100 --skill hashtag-science -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install revfactory/harness-100 hashtag-science --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/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/en/10-social-media-manager/.claude/skills/hashtag-science .claude/skills/hashtag-science && 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 "hashtag-science" agent skill from https://github.com/revfactory/harness-100/tree/main/en/10-social-media-manager/.claude/skills/hashtag-science into .claude/skills/hashtag-science/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hashtag-science", 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/revfactory/harness-100/tree/main/en/10-social-media-manager/.claude/skills/hashtag-scienceType 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 revfactory/harness-100 --skill hashtag-science -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install revfactory/harness-100 hashtag-science --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/en/10-social-media-manager/.claude/skills/hashtag-science .agents/skills/hashtag-science && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "hashtag-science" agent skill from https://github.com/revfactory/harness-100/tree/main/en/10-social-media-manager/.claude/skills/hashtag-science into .agents/skills/hashtag-science/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hashtag-science", 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 revfactory/harness-100 --skill hashtag-science -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install revfactory/harness-100 hashtag-science --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/en/10-social-media-manager/.claude/skills/hashtag-science .cursor/skills/hashtag-science && 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 "hashtag-science" agent skill from https://github.com/revfactory/harness-100/tree/main/en/10-social-media-manager/.claude/skills/hashtag-science into .cursor/skills/hashtag-science/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hashtag-science", 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/revfactory/harness-100.git --path en/10-social-media-manager/.claude/skills/hashtag-science--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 revfactory/harness-100 --skill hashtag-science -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install revfactory/harness-100 hashtag-science --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/en/10-social-media-manager/.claude/skills/hashtag-science .gemini/skills/hashtag-science && 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 "hashtag-science" agent skill from https://github.com/revfactory/harness-100/tree/main/en/10-social-media-manager/.claude/skills/hashtag-science into .gemini/skills/hashtag-science/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hashtag-science", 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 revfactory/harness-100 hashtag-scienceInstalls 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 revfactory/harness-100 --skill hashtag-science -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/en/10-social-media-manager/.claude/skills/hashtag-science .github/skills/hashtag-science && 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 "hashtag-science" agent skill from https://github.com/revfactory/harness-100/tree/main/en/10-social-media-manager/.claude/skills/hashtag-science into .github/skills/hashtag-science/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hashtag-science", 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 revfactory/harness-100 --skill hashtag-science -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install revfactory/harness-100 hashtag-science --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/en/10-social-media-manager/.claude/skills/hashtag-science .opencode/skills/hashtag-science && 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 "hashtag-science" agent skill from https://github.com/revfactory/harness-100/tree/main/en/10-social-media-manager/.claude/skills/hashtag-science into .opencode/skills/hashtag-science/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hashtag-science", 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
hashtag-science- GitHub stars
- 1.3k
- Token cost
- ~1.2k tokens
- SKILL.md length
- 364 words
- Files
- 1
- Skills in repo
- 464
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
A specialized skill for the hashtag-analyst agent covering hashtag science.
- Works in 3 steps: Seed Keyword Collection → Hashtag Analysis Matrix → Set Composition
- Keyword strategy
- SKILL.md covers Why Hashtag "Science", Hashtag Pyramid Strategy, Platform-Specific Hashtag… and Hashtag Research Process, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Hashtag Science is an agent skill from revfactory/harness-100. A specialized skill for the hashtag-analyst agent covering hashtag science. Provides hashtag pyramid strategy, competition analysis, trend prediction, and platform-specific optimal hashtag strategies. Use for 'hashtags,' 'keyword strategy,' 'trend analysis,' 'hashtag research,' and similar topics.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Data & Analytics, covering Forecasting and time series. The licence is Apache-2.0.
When your agent uses it
- Keyword strategy
- Hashtag research
Example prompts
- “hashtags,”
- “keyword strategy,”
- “trend analysis,”
- “/hashtag-science”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 8e8d35c. 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
Hashtag Science loads about 1.2k tokens when it runs. Until then it costs about 79 tokens; SKILL.md has 364 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 revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 364 words, ~1,168 tokens.
Download SKILL.mdSave it as
.claude/skills/hashtag-science/SKILL.md (or your agent's skills folder).- name
- hashtag-science
- description
- A specialized skill for the hashtag-analyst agent covering hashtag science. Provides hashtag pyramid strategy, competition analysis, trend prediction, and platform-specific optimal hashtag strategies. Use for 'hashtags,' 'keyword strategy,' 'trend analysis,' 'hashtag research,' and similar topics.
Hashtag Science — Hashtag Science Methodology
Specialized knowledge used by the hashtag-analyst agent when designing hashtag strategies.
Why Hashtag "Science"
Hashtags are not applied by intuition. They involve calculating discoverability, competition level, and targeting accuracy to design optimal combinations.
Hashtag Pyramid Strategy
/\
/ 1 \ <- Large (1M+ posts)
/------\ 2-3: Discovered with luck
/ 2 \ <- Medium (100K-1M)
/----------\ 5-7: Core battlefield
/ 3 \ <- Small (10K-100K)
/--------------\ 5-8: Targeted reach
/ 4 \ <- Niche (under 10K)
/------------------\ 3-5: Community entryRole by Tier
| Tier | Post Count | Role | Strategy |
|---|---|---|---|
| Large | 1M+ | Category indicator | #marketing, #startup — max 3 |
| Medium | 100K-1M | Core reach | Target's actual search terms — 5-7 |
| Small | 10K-100K | Competitive advantage | Specific topic terms — 5-8 |
| Niche | Under 10K | Community | Industry-specific terminology — 3-5 |
| Brand | Proprietary | Tracking/Campaign | #BrandName, #CampaignName — 1-2 |
Platform-Specific Hashtag Strategies
| Item | Recommendation |
|---|---|
| Count | 15-25 (use 20-25 of the max 30) |
| Placement | Bottom of caption or first comment |
| Composition | Follow pyramid ratios |
| Prohibited | Banned hashtags (shadowban risk), unrelated large tags |
| Rotation | Change 30%+ per post (repetition = spam detection) |
TikTok
| Item | Recommendation |
|---|---|
| Count | 3-5 (caption character limit) |
| Placement | Directly in caption |
| Composition | 1-2 trending + 2-3 niche |
| Special | #fyp #foryou have no effect (officially denied) |
| Strategy | Trending sound + niche hashtag combination is optimal |
| Item | Recommendation |
|---|---|
| Count | 3-5 (excessive use flagged as spam) |
| Placement | Bottom of post |
| Composition | 2-3 industry keywords + 1-2 role keywords |
| Strategy | Use followable hashtags (#marketing, #startup) |
X/Twitter
| Item | Recommendation |
|---|---|
| Count | 1-2 (3+ decreases engagement) |
| Placement | Naturally within tweet body |
| Composition | 1 trending + 1 niche |
| Strategy | Natural keyword insertion is more effective than hashtags |
Hashtag Research Process
Show full SKILL.md (146 more words)Show less
Step 1: Seed Keyword Collection
| Source | Method |
|---|---|
| Competitors | Collect hashtags from competitor accounts' popular posts |
| Autocomplete | Enter keywords in Instagram/TikTok search -> collect autocomplete suggestions |
| Related Tags | Collect "related hashtags" from hashtag pages |
| Community | Observe hashtags used by the target audience |
Step 2: Hashtag Analysis Matrix
| Hashtag | Post Count | Tier | Relevance | Competition | Final Score |
|---|---|---|---|---|---|
| #[tag] | XXX,XXX | Large/Med/Small/Niche | 1-5 | 1-5 | Weighted sum |
Final Score = (Relevance x 0.5) + (Optimal Competition x 0.3) + (Trending x 0.2)
- Relevance: Degree of exact match with content
- Optimal Competition: Neither too high nor too low is optimal (inverted U-curve)
- Trending: Growing tags get bonus pointsStep 3: Set Composition
Pre-compose hashtag sets by post type:
[Educational Content Set]
Large: #marketing #business
Medium: #marketingstrategy #digitalmarketing #contentmarketing #snsmarketing #marketingtips
Small: #marketinglearning #marketerlife #performancemarketing #growthhacking #brandingstrategy
Niche: #marketergrowth #juniormarketer #marketingpractice
Brand: #BrandName
[Product Showcase Set]
[Community Set]
[Trend Set]Banned Hashtag Management
Shadowban Risk Hashtags
Some hashtags can trigger "shadowbans" on platforms like Instagram, limiting content visibility:
- Hashtags misused for sexual/violent meanings
- Hashtags heavily used by spam bots
- Hashtags temporarily restricted during certain periods
Prevention Strategy
- Search the hashtag before use to confirm normal visibility
- If the "recent posts" tab is empty, restriction is likely
- Change 30%+ of hashtag sets each time
- Do not use large hashtags unrelated to the content
© revfactory, Apache-2.0. 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 en/10-social-media-manager/.claude/skills/hashtag-science of revfactory/harness-100.
Open the folder on GitHubat commit 8e8d35c
Compare with similar skills
Hashtag Science 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 |
|---|---|---|---|---|---|---|
| Hashtag Science this skillrevfactory/harness-100 | 1.3k | — | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| TimesFM Forecastinggoogle-research/timesfm | 34k | — | ~4.7k | Automated safety check: Pass | Apache-2.0 | |
| StatsmodelszLanqing/codex-claude-academic-skills | 4.7k | 15 repos | ~4.9k | Automated safety check: Pass | BSD-3-Clause | |
| Timesfm ForecastingzLanqing/codex-claude-academic-skills | 4.7k | 3 repos | ~7.5k | Automated safety check: Notes | Apache-2.0 | |
| Find Hypertable Candidatestimescale/pg-aiguide | 1.9k | 1 repos | ~2.6k | Automated safety check: Pass | Apache-2.0 | |
| Pensieve Searcharkohut/pensieve | 1.4k | — | ~8.2k | Automated safety check: Pass | Apache-2.0 |
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Timesfm Forecasting
zLanqing/codex-claude-academic-skills
Zero-shot time series forecasting with Google's TimesFM foundation model.
Find Hypertable Candidates
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Related
Categories
Questions about Hashtag Science
What does Hashtag Science do?
A specialized skill for the hashtag-analyst agent covering hashtag science. Hashtag Science is an agent skill from revfactory/harness-100. A specialized skill for the hashtag-analyst agent covering hashtag science.
When should I use Hashtag Science?
Hashtag Science fits situations like: keyword strategy; hashtag research.
How do I install Hashtag Science in Claude Code?
Run `npx skills add revfactory/harness-100 --skill hashtag-science -a claude-code`. Or copy the skill folder (en/10-social-media-manager/.claude/skills/hashtag-science in revfactory/harness-100) into .claude/skills/hashtag-science in your project. Claude Code loads it when a task matches its description.
How do I install Hashtag Science in Codex?
Run `npx skills add revfactory/harness-100 --skill hashtag-science -a codex`. Or copy the skill folder (en/10-social-media-manager/.claude/skills/hashtag-science in revfactory/harness-100) into .agents/skills/hashtag-science in your project. Codex loads it when a task matches its description.
Can I use Hashtag Science 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 revfactory/harness-100 --skill hashtag-science -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hashtag-science, .gemini/skills/hashtag-science, .github/skills/hashtag-science and .opencode/skills/hashtag-science in your project.
What does Hashtag Science need to run?
SKILL.md names no scripts, command-line tools or credentials: Hashtag Science is instructions for the agent only.
Does Hashtag Science 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 Hashtag Science 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 Hashtag Science use?
Hashtag Science is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Hashtag Science use?
About 1.2k tokens (SKILL.md is roughly 4.7k 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 Hashtag Science?
Skills that share tags, products or a category with Hashtag Science: TimesFM Forecasting (google-research/timesfm, 34k stars), Statsmodels (zLanqing/codex-claude-academic-skills, 4.7k stars), Timesfm Forecasting (zLanqing/codex-claude-academic-skills, 4.7k stars) and Find Hypertable Candidates (timescale/pg-aiguide, 1.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Hashtag Science?
revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,295 GitHub stars. The repository holds 464 skills in this directory. The repository was last updated on March 22, 2026.
Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.