Configuring Horizon
coollabsio/coolify
A skill your agent uses whenever the user mentions Horizon by name in a Laravel context.
Automatically activated when user asks how something works, wants to understand unfamiliar code, needs to explore a new codebase, or asks questions like "where is X implemented?", "how does Y…
Install Investigating Codebases
$ npx skills add aiskillstore/marketplace --skill investigating-codebases -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace investigating-codebases --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/c0ntr0lledcha0s/investigating-codebases .claude/skills/investigating-codebases && 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 "investigating-codebases" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/investigating-codebases into .claude/skills/investigating-codebases/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigating-codebases", 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/c0ntr0lledcha0s/investigating-codebasesType 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 investigating-codebases -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace investigating-codebases --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/c0ntr0lledcha0s/investigating-codebases .agents/skills/investigating-codebases && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "investigating-codebases" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/investigating-codebases into .agents/skills/investigating-codebases/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigating-codebases", 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 investigating-codebases -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace investigating-codebases --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/c0ntr0lledcha0s/investigating-codebases .cursor/skills/investigating-codebases && 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 "investigating-codebases" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/investigating-codebases into .cursor/skills/investigating-codebases/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigating-codebases", 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/c0ntr0lledcha0s/investigating-codebases--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 investigating-codebases -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace investigating-codebases --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/c0ntr0lledcha0s/investigating-codebases .gemini/skills/investigating-codebases && 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 "investigating-codebases" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/investigating-codebases into .gemini/skills/investigating-codebases/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigating-codebases", 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 investigating-codebasesInstalls 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 investigating-codebases -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/c0ntr0lledcha0s/investigating-codebases .github/skills/investigating-codebases && 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 "investigating-codebases" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/investigating-codebases into .github/skills/investigating-codebases/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigating-codebases", 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 investigating-codebases -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 investigating-codebases --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/c0ntr0lledcha0s/investigating-codebases .opencode/skills/investigating-codebases && 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 "investigating-codebases" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/c0ntr0lledcha0s/investigating-codebases into .opencode/skills/investigating-codebases/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "investigating-codebases", 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
investigating-codebases- GitHub stars
- 430
- Used in
- 1 other repo
- Token cost
- ~2.7k tokens
- SKILL.md length
- 645 words
- Files
- 10 (incl. scripts, references, assets)
- Skills in repo
- 1,085
- Repo updated
- First seen
- Licence
- None found
At a glance
Automatically activated when user asks how something works, wants to understand unfamiliar code, needs to explore a new codebase, or asks questions like "where is X implemented?", "how does Y…
- Works in 3 steps: High-Level Reconnaissance → Targeted Investigation → Deep Dive Analysis
- Asks how something works
- SKILL.md covers Your Capabilities, When to Use This Skill, Investigation Methodology and Investigation Strategies, plus 4 more sections
- Runs Python and Shell scripts from its folder; calls bash and python
What it does
Investigating Codebases is an agent skill from aiskillstore/marketplace. Automatically activated when user asks how something works, wants to understand unfamiliar code, needs to explore a new codebase, or asks questions like "where is X implemented?", "how does Y work?", or "explain the Z component"
Its SKILL.md is about 2.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 12 other files, including scripts, reference files and assets (for example `assets/flow-diagram-syntax.md`, `assets/investigation-template.md` and `references/common-patterns.md`).
It sits in Backend & APIs. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Asks how something works
- Wants to understand unfamiliar code
- Needs to explore a new codebase
- Asks questions like where is X implemented?
Example prompts
- “where is X implemented?”
- “how does Y work?”
- “explain the Z component”
- “/investigating-codebases”
Requirements
- Python 3
- A Bash shell
- Pre-approved tools (allowed-tools): Read, Grep, Glob, Task
Workflow steps
3 steps, taken from the step headings in SKILL.md.
- High-Level Reconnaissance
- Targeted Investigation
- Deep Dive Analysis
What it can do on your machine
Read from SKILL.md and the folder at commit 4ac52da. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadGrepGlobTask
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 3 files in scripts/ (Python and Shell), which the agent can run.
Shell commands in SKILL.md call:
bashpython
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
Investigating Codebases loads about 2.7k tokens when it runs, and up to ~6.4k if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 645 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteMentions a .env fileSKILL.md:293
6. Config: config/, .env files
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 645 words (~2,729 tokens).
“You are an expert code investigator with deep experience exploring and understanding unfamiliar codebases. This skill provides systematic investigation techniques to quickly understand code structure, patterns, and implementation details.”
- name
- investigating-codebases
- allowed-tools
- Read, Grep, Glob, Task
- version
- 1.0.0
Files
SKILL.md and 9 other files (scripts, references, assets) in skills/c0ntr0lledcha0s/investigating-codebases of aiskillstore/marketplace.
- SKILL.md
- assets/flow-diagram-syntax.md
- assets/investigation-template.md
- references/common-patterns.md
- references/framework-clues.md
- references/investigation-checklist.md
- scripts/find-entry-points.py
- scripts/map-structure.sh
- scripts/trace-imports.py
- skill-report.json
Open the folder on GitHubat commit 4ac52da
Used in 1 other repository
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Investigating Codebases 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 |
|---|---|---|---|---|---|---|
| Investigating Codebases this skillaiskillstore/marketplace | 430 | 1 repos | ~2.7k | Automated safety check: Notes | None | |
| Configuring Horizoncoollabsio/coolify | 63k | 4 repos | ~898 | Automated safety check: Pass | MIT | |
| Nestjs Best Practicesrolling-scopes/rsschool-app | 10k | 6 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Sub2API AdminWei-Shaw/sub2api | 43k | 1 repos | ~717 | Automated safety check: Pass | LGPL-3.0 | |
| Firecrawl Build Onboardingfirecrawl/firecrawl | 189k | 1 repos | ~1.4k | Automated safety check: Notes | ISC | |
| Obsidian BasesAtmosphere/atmosphere | 3.8k | 22 repos | ~3.2k | Automated safety check: Pass | Apache-2.0 |
Similar skills
Nestjs Best Practices
rolling-scopes/rsschool-app
NestJS best practices and architecture patterns for building production-ready applications.
Sub2API Admin
Wei-Shaw/sub2api
Manages a Sub2API deployment from the command line: accounts, redeem and invitation codes, groups, proxies, imports, exports and raw admin API calls.
Firecrawl Build Onboarding
firecrawl/firecrawl
Gets Firecrawl working in a project: signs you in through the browser, saves FIRECRAWL_API_KEY to .env and picks the first SDK or REST path.
Obsidian Bases
Atmosphere/atmosphere
Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries.
Fortify Development
coollabsio/coolify
ACTIVATE when the user works on authentication in Laravel. An agent skill from coollabsio/coolify.
More from aiskillstore/marketplace
All 1,085 skills in this repoCode Stats
aiskillstore/marketplace
Analyze codebase with tokei (fast line counts by language) and difft (semantic AST-aware diffs).
Data Processing
aiskillstore/marketplace
Process JSON with jq and YAML/TOML with yq. An agent skill from aiskillstore/marketplace.
Doc Scanner
aiskillstore/marketplace
Scans for project documentation files (AGENTS.md, CLAUDE.md, GEMINI.md, COPILOT.md, CURSOR.md, WARP.md, and 15+ other formats) and synthesizes guidance.
File Search
aiskillstore/marketplace
Modern file and content search using fd, ripgrep (rg), and fzf.
Find Replace
aiskillstore/marketplace
Modern find-and-replace using sd (simpler than sed) and batch replacement patterns.
Project Planner
aiskillstore/marketplace
Detects stale project plans and suggests session commands. An agent skill from aiskillstore/marketplace.
Related
Categories
Questions about Investigating Codebases
What does Investigating Codebases do?
Automatically activated when user asks how something works, wants to understand unfamiliar code, needs to explore a new codebase, or asks questions like "where is X implemented?", "how does Y…. Investigating Codebases is an agent skill from aiskillstore/marketplace.
When should I use Investigating Codebases?
Investigating Codebases fits situations like: asks how something works; wants to understand unfamiliar code; needs to explore a new codebase; asks questions like where is X implemented?.
How do I install Investigating Codebases in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill investigating-codebases -a claude-code`. Or copy the skill folder (skills/c0ntr0lledcha0s/investigating-codebases in aiskillstore/marketplace) into .claude/skills/investigating-codebases in your project. Claude Code loads it when a task matches its description.
How do I install Investigating Codebases in Codex?
Run `npx skills add aiskillstore/marketplace --skill investigating-codebases -a codex`. Or copy the skill folder (skills/c0ntr0lledcha0s/investigating-codebases in aiskillstore/marketplace) into .agents/skills/investigating-codebases in your project. Codex loads it when a task matches its description.
Can I use Investigating Codebases 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 investigating-codebases -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/investigating-codebases, .gemini/skills/investigating-codebases, .github/skills/investigating-codebases and .opencode/skills/investigating-codebases in your project.
What does Investigating Codebases need to run?
Going by SKILL.md and its folder, Investigating Codebases needs Python and a shell for the scripts in its folder and the command-line tools its instructions call (bash and python). Our summary lists: Python 3; A Bash shell. Its frontmatter pre-approves these tools: Read, Grep, Glob, Task.
Does Investigating Codebases 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 Investigating Codebases safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. 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 Investigating Codebases use?
No licence was found for Investigating Codebases or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Investigating Codebases use?
About 2.7k tokens (SKILL.md is roughly 11k 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 3.7k tokens, read only when the agent opens those files.
What are the alternatives to Investigating Codebases?
Skills that share tags, products or a category with Investigating Codebases: Configuring Horizon (coollabsio/coolify, 63k stars), Nestjs Best Practices (rolling-scopes/rsschool-app, 10k stars), Sub2API Admin (Wei-Shaw/sub2api, 43k stars) and Firecrawl Build Onboarding (firecrawl/firecrawl, 189k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Investigating Codebases?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,085 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.