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Agent skill

Feature Map

by onyx-dot-app in onyx-dot-app/onyx

Use the Onyx feature map (.agents/feature-map/) to learn what a product surface does, the code behind it, and what a change can break.

Custom licenceAuto-check passed

Install Feature Map

skills CLI
$ npx skills add onyx-dot-app/onyx --skill feature-map -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install onyx-dot-app/onyx feature-map --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/onyx-dot-app/onyx.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/feature-map .claude/skills/feature-map && rm -rf skills-src

Use ~/.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/

Facts

Skill name
feature-map
GitHub stars
32k
Token cost
~459 tokens
SKILL.md length
243 words
Files
1
Skills in repo
9
Repo updated
First seen
Licence
Custom licence

At a glance

Use the Onyx feature map (.agents/feature-map/) to learn what a product surface does, the code behind it, and what a change can break.

  • SKILL.md covers Find the component, Before you change code, When you review a diff or PR and Keep the map true
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Feature Map is an agent skill from onyx-dot-app/onyx. Use the Onyx feature map (.agents/feature-map/) to learn what a product surface does, the code behind it, and what a change can break. Use it before changing a feature, when reviewing a diff or PR, and when asked what a feature does or how parts connect.

Its SKILL.md is about 460 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Open Source AI Platform - AI Chat with advanced features that works with every LLM.

Example prompts

  • “/feature-map”

What it can do on your machine

Read from SKILL.md and the folder at commit fba54a4. 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

Feature Map loads about 459 tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 243 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~67
When it runs · the whole SKILL.md, loaded when a task matches
~459

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 243 words (~459 tokens).

“.agents/feature-map/ describes every Onyx product surface as one component document: what the user sees, the code paths, the data model, the contracts, what else a change touches, how to verify it, and the known traps.”

— opening of SKILL.md by onyx-dot-app, Custom licence
name
feature-map

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .agents/skills/feature-map of onyx-dot-app/onyx.

Open the folder on GitHubat commit fba54a4

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in onyx-dot-app/onyx, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Feature Map 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.

Feature Map compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Feature Map this skillonyx-dot-app/onyx32k—~459Automated safety check: PassCustom licence
Learning to Learn (OpenMAIC)THU-MAIC/OpenMAIC40k—~502Automated safety check: PassMIT
Scikit LearnK-Dense-AI/scientific-agent-skills48k1 repos~3.3kAutomated safety check: NotesBSD-3-Clause
Project Learnings Managergarrytan/gstack136k—~8.2kAutomated safety check: NotesMIT
Continuous Learningaffaan-m/ECC275k—~1.1kAutomated safety check: PassMIT
Continuous Learningaffaan-m/ECC275k—~1.2kAutomated safety check: PassMIT

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Questions about Feature Map

What does Feature Map do?

Use the Onyx feature map (.agents/feature-map/) to learn what a product surface does, the code behind it, and what a change can break. Feature Map is an agent skill from onyx-dot-app/onyx.agents/feature-map/) to learn what a product surface does, the code behind it, and what a change can break.

How do I install Feature Map in Claude Code?

Run `npx skills add onyx-dot-app/onyx --skill feature-map -a claude-code`. Or copy the skill folder (.agents/skills/feature-map in onyx-dot-app/onyx) into .claude/skills/feature-map in your project. Claude Code loads it when a task matches its description.

How do I install Feature Map in Codex?

Run `npx skills add onyx-dot-app/onyx --skill feature-map -a codex`. Or copy the skill folder (.agents/skills/feature-map in onyx-dot-app/onyx) into .agents/skills/feature-map in your project. Codex loads it when a task matches its description.

Can I use Feature Map 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 onyx-dot-app/onyx --skill feature-map -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-map, .gemini/skills/feature-map, .github/skills/feature-map and .opencode/skills/feature-map in your project.

What does Feature Map need to run?

SKILL.md names no scripts, command-line tools or credentials: Feature Map is instructions for the agent only.

Does Feature Map 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 Feature Map 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 Feature Map use?

Feature Map has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Feature Map use?

About 459 tokens (SKILL.md is roughly 1.8k 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 Feature Map?

Skills that share tags, products or a category with Feature Map: Learning to Learn (OpenMAIC) (THU-MAIC/OpenMAIC, 40k stars), Scikit Learn (K-Dense-AI/scientific-agent-skills, 48k stars), Project Learnings Manager (garrytan/gstack, 136k stars) and Continuous Learning (affaan-m/ECC, 275k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Feature Map?

onyx-dot-app (a GitHub organization) maintains it in onyx-dot-app/onyx, which has 32,352 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on October 8, 2026.

Source: onyx-dot-app/onyx on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.