Deepsec Documentation Guide
vercel-labs/deepsec
Points the agent at deepsec's own docs to answer questions about initializing, configuring, resuming, scanning with and extending the vulnerability scanner.
Rebuilds an app screen by screen from the recon map: app shell first, then the core flow as a vertical slice, then every screen with all its states, ticking off the feature matrix as it goes.
Install Replica Build
$ npx skills add Jakeschincariol/replica-skill --skill replica-build -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Jakeschincariol/replica-skill replica-build --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/Jakeschincariol/replica-skill.git skills-src && mkdir -p .claude/skills && cp -r skills-src/replica-build .claude/skills/replica-build && 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 "replica-build" agent skill from https://github.com/Jakeschincariol/replica-skill/tree/main/replica-build into .claude/skills/replica-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "replica-build", 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/Jakeschincariol/replica-skill/tree/main/replica-buildType 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 Jakeschincariol/replica-skill --skill replica-build -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Jakeschincariol/replica-skill replica-build --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Jakeschincariol/replica-skill.git skills-src && mkdir -p .agents/skills && cp -r skills-src/replica-build .agents/skills/replica-build && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "replica-build" agent skill from https://github.com/Jakeschincariol/replica-skill/tree/main/replica-build into .agents/skills/replica-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "replica-build", 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 Jakeschincariol/replica-skill --skill replica-build -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Jakeschincariol/replica-skill replica-build --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Jakeschincariol/replica-skill.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/replica-build .cursor/skills/replica-build && 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 "replica-build" agent skill from https://github.com/Jakeschincariol/replica-skill/tree/main/replica-build into .cursor/skills/replica-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "replica-build", 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/Jakeschincariol/replica-skill.git --path replica-build--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 Jakeschincariol/replica-skill --skill replica-build -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Jakeschincariol/replica-skill replica-build --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Jakeschincariol/replica-skill.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/replica-build .gemini/skills/replica-build && 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 "replica-build" agent skill from https://github.com/Jakeschincariol/replica-skill/tree/main/replica-build into .gemini/skills/replica-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "replica-build", 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 Jakeschincariol/replica-skill replica-buildInstalls 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 Jakeschincariol/replica-skill --skill replica-build -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Jakeschincariol/replica-skill.git skills-src && mkdir -p .github/skills && cp -r skills-src/replica-build .github/skills/replica-build && 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 "replica-build" agent skill from https://github.com/Jakeschincariol/replica-skill/tree/main/replica-build into .github/skills/replica-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "replica-build", 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 Jakeschincariol/replica-skill --skill replica-build -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Jakeschincariol/replica-skill replica-build --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Jakeschincariol/replica-skill.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/replica-build .opencode/skills/replica-build && 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 "replica-build" agent skill from https://github.com/Jakeschincariol/replica-skill/tree/main/replica-build into .opencode/skills/replica-build/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "replica-build", 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
replica-build- GitHub stars
- 1.4k
- Token cost
- ~928 tokens
- SKILL.md length
- 514 words
- Files
- 1
- Skills in repo
- 11
- Repo updated
- First seen
- Licence
- MIT
At a glance
Rebuilds an app screen by screen from the recon map: app shell first, then the core flow as a vertical slice, then every screen with all its states, ticking off the feature matrix as it goes.
- Works in 4 steps: the shell → the vertical slice → screen by screen → …
- The user says build the clone
- SKILL.md covers The rules, Step 1: the shell, Step 2: the vertical slice and Step 3: screen by screen, plus 4 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Replica Build is an agent skill from Jakeschincariol/replica-skill. Rebuilds an app screen by screen from the recon map: app shell first, then the core flow as a vertical slice, then every screen with all its states, ticking off the feature matrix as it goes. Writes every line fresh, never the original's code, assets or copy. Use when the user says "build the clone", "build screen S07", "start building", "rebuild this screen", "implement the booking page", or after /replica-design.
Its SKILL.md is about 930 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 Security. The repository describes itself as: Eleven free Claude skills that clone any app: reverse-engineer it, rebuild it, test it for bugs, then fix what its users hate. Free, MIT. The licence is MIT.
When your agent uses it
- The user says build the clone
- Build screen S07
- Rebuild this screen
- Implement the booking page
Example prompts
- “s code, assets or copy. Use when the user says”
- “build screen S07”
- “start building”
- “/replica-build”
Workflow steps
4 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 77c9436. 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
Replica Build loads about 928 tokens when it runs. Until then it costs about 108 tokens; SKILL.md has 514 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 Jakeschincariol/replica-skill at commit 77c9436, republished under its MIT licence (© Jakeschincariol). 514 words, ~928 tokens.
Download SKILL.mdSave it as
.claude/skills/replica-build/SKILL.md (or your agent's skills folder).- name
- replica-build
- description
- Rebuilds an app screen by screen from the recon map: app shell first, then the core flow as a vertical slice, then every screen with all its states, ticking off the feature matrix as it goes. Writes every line fresh, never the original's code, assets or copy. Use when the user says "build the clone", "build screen S07", "start building", "rebuild this screen", "implement the booking page", or after /replica-design.
replica-build
Reads replica/recon.md, replica/architecture.md, replica/design/.
Updates replica/features.csv (the clone column) and keeps
replica/build-log.md.
The rules
- Clean room. Every line of code is written here, from the recon map and the specs. Never paste the original's HTML, CSS, JavaScript, SVGs or images, never load anything from its domain or CDN, never "view source and adapt".
- Your words. Write every label, button, empty state and email fresh. Matching what a button does is parity. Matching its sentence is copying.
- Tokens only. No raw hex or pixel values in components. If a value is missing, add it to the tokens.
Step 1: the shell
Routing for every screen in the inventory (stub pages are fine), the layout (nav, header, sidebar), tokens wired in, the primitives from replica-design, and seed data so screens have something real to show. Commit.
Step 2: the vertical slice
The core loop from the recon map, end to end, before anything else. For a booking app: create an event type, open the public page, book a slot, see it on the dashboard. Ugly is fine. Working is the point. If replica-backend has not run yet, use the seed data and a fake data layer with the same function signatures, so swapping in the real one changes no screen code.
Step 3: screen by screen
Work in the order of architecture.md. For each screen:
- Read its row in the recon map: purpose, components, states, which flows pass through it.
- Look at the reference screenshot for layout and hierarchy. Not for pixels.
- Build it with the primitives. Real data from the data layer.
- Every state: empty, loading (skeletons, not spinners, if the original does), filled, error, no permission, long content (a 60 character name), mobile width.
- Basics, every time: semantic HTML, labels on inputs, keyboard reachable, visible focus, images with alt text.
- Set the matching rows in
features.csvtoyesorpartial(with a note). - Screenshot it at the same viewport as the reference into
replica/clone-screens/S07.pngfor replica-diff. - One commit per screen:
build: S07 booking page.
Show full SKILL.md (171 more words)Show less
Definition of done, per screen
- every state from the recon map, plus empty, error and loading
- works at 390px and 1440px wide
- keyboard only: can complete the flow
- no console errors
- no hard-coded copy borrowed from the original
- features.csv updated
- screenshot saved for diff
Step 4: the build log
replica/build-log.md, one line per screen: ID, date, done or partial, what
is missing, what was harder than expected. When a feature is bigger than it
looked, say so in the log and in the chat. Do not quietly ship half of it.
When you are stuck on how something works
Go back to the original as a user: read its help article, watch its public walkthrough, use the user's own account. Do not dig into its code or network calls. Then build your own version of the behaviour.
Output
Screens built, the feature matrix updated, screenshots saved, and a summary:
screens done of total, must-haves done of total, what is next. Then
/replica-backend if the data layer is still fake, else /replica-test.
© Jakeschincariol, 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 replica-build of Jakeschincariol/replica-skill.
Open the folder on GitHubat commit 77c9436
Compare with similar skills
Replica Build 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 |
|---|---|---|---|---|---|---|
| Replica Build this skillJakeschincariol/replica-skill | 1.4k | — | ~928 | Automated safety check: Pass | MIT | |
| Deepsec Documentation Guidevercel-labs/deepsec | 8.1k | — | ~956 | Automated safety check: Pass | Apache-2.0 | |
| Skill Scannergetsentry/skills | 1k | 4 repos | ~2.5k | Automated safety check: Warn | Apache-2.0 | |
| Serenity Aleabitoreddityan-labs/serenity-aleabitoreddit | 481 | 1 repos | ~3.3k | Automated safety check: Pass | None | |
| Security Alert Triageelastic/agent-skills | 592 | 1 repos | ~3.5k | Automated safety check: Notes | Apache-2.0 | |
| Shiro Attack CLISummerSec/ShiroAttack2 | 2.6k | — | ~945 | Automated safety check: Pass | MIT |
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Questions about Replica Build
What does Replica Build do?
Rebuilds an app screen by screen from the recon map: app shell first, then the core flow as a vertical slice, then every screen with all its states, ticking off the feature matrix as it goes. Replica Build is an agent skill from Jakeschincariol/replica-skill. Rebuilds an app screen by screen from the recon map: app shell first, then the core flow as a vertical slice, then every screen with all its states, ticking off the feature matrix as it goes.
When should I use Replica Build?
Replica Build fits situations like: the user says build the clone; build screen S07; rebuild this screen; implement the booking page.
How do I install Replica Build in Claude Code?
Run `npx skills add Jakeschincariol/replica-skill --skill replica-build -a claude-code`. Or copy the skill folder (replica-build in Jakeschincariol/replica-skill) into .claude/skills/replica-build in your project. Claude Code loads it when a task matches its description.
How do I install Replica Build in Codex?
Run `npx skills add Jakeschincariol/replica-skill --skill replica-build -a codex`. Or copy the skill folder (replica-build in Jakeschincariol/replica-skill) into .agents/skills/replica-build in your project. Codex loads it when a task matches its description.
Can I use Replica Build 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 Jakeschincariol/replica-skill --skill replica-build -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/replica-build, .gemini/skills/replica-build, .github/skills/replica-build and .opencode/skills/replica-build in your project.
What does Replica Build need to run?
SKILL.md names no scripts, command-line tools or credentials: Replica Build is instructions for the agent only.
Does Replica Build 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 Replica Build 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 Replica Build use?
Replica Build 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 Replica Build use?
About 928 tokens (SKILL.md is roughly 3.7k 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 Replica Build?
Skills that share tags, products or a category with Replica Build: Deepsec Documentation Guide (vercel-labs/deepsec, 8.1k stars), Skill Scanner (getsentry/skills, 1k stars), Serenity Aleabitoreddit (yan-labs/serenity-aleabitoreddit, 481 stars) and Security Alert Triage (elastic/agent-skills, 592 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Replica Build?
Jakeschincariol (a GitHub user) maintains it in Jakeschincariol/replica-skill, which has 1,432 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 3, 2026.
Source: Jakeschincariol/replica-skill on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.