Horizon Track
ruvnet/ruflo
Track long-horizon objectives across multiple sessions with milestone checkpoints, progress persistence, and drift detection
Manage features.yml for tracking requirements and progress; use proactively ONLY when features.yml already exists, or invoke manually to create one; complements TodoWrite for persistent project state.
No licenceAuto-check passed
Install Feature File
$ npx skills add aiskillstore/marketplace --skill feature-file -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace feature-file --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/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/chemiseblanc/feature-file .claude/skills/feature-file && 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 "feature-file" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/chemiseblanc/feature-file into .claude/skills/feature-file/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "feature-file", 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/aiskillstore/marketplace/tree/main/skills/chemiseblanc/feature-fileType 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 aiskillstore/marketplace --skill feature-file -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace feature-file --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/chemiseblanc/feature-file .agents/skills/feature-file && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "feature-file" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/chemiseblanc/feature-file into .agents/skills/feature-file/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "feature-file", 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 aiskillstore/marketplace --skill feature-file -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace feature-file --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/chemiseblanc/feature-file .cursor/skills/feature-file && 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 "feature-file" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/chemiseblanc/feature-file into .cursor/skills/feature-file/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "feature-file", 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/aiskillstore/marketplace.git --path skills/chemiseblanc/feature-file--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 aiskillstore/marketplace --skill feature-file -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace feature-file --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/chemiseblanc/feature-file .gemini/skills/feature-file && 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 "feature-file" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/chemiseblanc/feature-file into .gemini/skills/feature-file/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "feature-file", 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 aiskillstore/marketplace feature-fileInstalls 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 aiskillstore/marketplace --skill feature-file -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/chemiseblanc/feature-file .github/skills/feature-file && 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 "feature-file" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/chemiseblanc/feature-file into .github/skills/feature-file/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "feature-file", 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 aiskillstore/marketplace --skill feature-file -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace feature-file --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/chemiseblanc/feature-file .opencode/skills/feature-file && 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 "feature-file" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/chemiseblanc/feature-file into .opencode/skills/feature-file/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "feature-file", 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
feature-file- GitHub stars
- 430
- Token cost
- ~2k tokens
- SKILL.md length
- 760 words
- Files
- 7 (incl. scripts, references)
- Skills in repo
- 1,108
- Repo updated
- First seen
- Licence
- None found
At a glance
Manage features.yml for tracking requirements and progress; use proactively ONLY when features.yml already exists, or invoke manually to create one; complements TodoWrite for persistent project state.
- Works in 4 steps: Check if features.yml exists in project… → If missing: do not use this skill… → Plan the work in features.yml before… → …
- SKILL.md covers Quick Reference, Proactive Usage, Phase Transitions and Workflows, plus 3 more sections
- Runs Python scripts from its folder; calls uv
What it does
Feature File is an agent skill from aiskillstore/marketplace. Manage features.yml for tracking requirements and progress; use proactively ONLY when features.yml already exists, or invoke manually to create one; complements TodoWrite for persistent project state.
Its SKILL.md is about 2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including scripts and reference files (for example `references/schema.md`, `scripts/check-version.py` and `scripts/extract-issues.py`).
The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
Example prompts
- “/feature-file”
Requirements
- Python 3
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Check if features.yml exists in project root
- If missing: do not use this skill proactively (stop here)
- Plan the work in features.yml before writing code
- Set the first requirement to status: In-Progress
What it can do on your machine
Read from SKILL.md and the folder at commit ad8daf7. 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
Ships 4 files in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
uv
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv, which can reach the network depending on how they are called.
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
Feature File loads about 2k tokens when it runs, and up to ~4.1k if it reads all its reference files. Until then it costs about 53 tokens; SKILL.md has 760 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); the scripts in this folder are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 760 words (~2,041 tokens).
“Manage features.yml - a waterfall-style planning document combining structured requirements tracking with incremental development.”
- name
- feature-file
Files
SKILL.md and 6 other files (scripts, references) in skills/chemiseblanc/feature-file of aiskillstore/marketplace.
- SKILL.md
- references/schema.md
- scripts/check-version.py
- scripts/extract-issues.py
- scripts/extract-work.py
- scripts/feature-status.py
- skill-report.json
Open the folder on GitHubat commit ad8daf7
Compare with similar skills
Feature File 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 |
|---|---|---|---|---|---|---|
| Feature File this skillaiskillstore/marketplace | 430 | — | ~2k | Automated safety check: Pass | None | |
| Horizon Trackruvnet/ruflo | 74k | — | ~744 | Automated safety check: Notes | MIT | |
| Cost Trackingaffaan-m/ECC | 275k | 1 repos | ~1.3k | Automated safety check: Pass | MIT | |
| Requirementsrizsotto/Bear | 6.5k | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| TrackingBuilderIO/agent-native | 7.1k | — | ~7.8k | Automated safety check: Pass | None | |
| Time Trackingsickn33/agentic-awesome-skills | 47k | 1 repos | ~3.8k | Automated safety check: Pass | MIT |
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Questions about Feature File
What does Feature File do?
Manage features.yml for tracking requirements and progress; use proactively ONLY when features.yml already exists, or invoke manually to create one; complements TodoWrite for persistent project state. Feature File is an agent skill from aiskillstore/marketplace.yml already exists, or invoke manually to create one; complements TodoWrite for persistent project state.
How do I install Feature File in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill feature-file -a claude-code`. Or copy the skill folder (skills/chemiseblanc/feature-file in aiskillstore/marketplace) into .claude/skills/feature-file in your project. Claude Code loads it when a task matches its description.
How do I install Feature File in Codex?
Run `npx skills add aiskillstore/marketplace --skill feature-file -a codex`. Or copy the skill folder (skills/chemiseblanc/feature-file in aiskillstore/marketplace) into .agents/skills/feature-file in your project. Codex loads it when a task matches its description.
Can I use Feature File 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 aiskillstore/marketplace --skill feature-file -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/feature-file, .gemini/skills/feature-file, .github/skills/feature-file and .opencode/skills/feature-file in your project.
What does Feature File need to run?
Going by SKILL.md and its folder, Feature File needs Python for the scripts in its folder and the command-line tools its instructions call (uv). Our summary lists: Python 3.
Does Feature File access the network?
SKILL.md contains no URLs. Its commands use uv, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Feature File 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Feature File use?
No licence was found for Feature File or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Feature File use?
About 2k tokens (SKILL.md is roughly 8.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 2k tokens, read only when the agent opens those files.
What are the alternatives to Feature File?
Skills that share tags, products or a category with Feature File: Horizon Track (ruvnet/ruflo, 74k stars), Cost Tracking (affaan-m/ECC, 275k stars), Requirements (rizsotto/Bear, 6.5k stars) and Tracking (BuilderIO/agent-native, 7.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Feature File?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,108 skills in this directory. The repository was last updated on October 7, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.