Agent skill

Form Filling

Automatically fills web forms using provided field data and can optionally submit the form.

Apache-2.0Auto-check passedDocuments & Office

Install Form Filling

skills CLI

$ npx skills add platonai/Browser4 --skill form-filling -a claude-code

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

GitHub CLI

$ gh skill install platonai/Browser4 form-filling --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/platonai/Browser4.git skills-src && mkdir -p .claude/skills && cp -r skills-src/browser4-agentic/src/main/resources/skills/form-filling .claude/skills/form-filling && 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/

Paste into Claude Code

Install the "form-filling" agent skill from https://github.com/platonai/Browser4/tree/main/browser4-agentic/src/main/resources/skills/form-filling into .claude/skills/form-filling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-filling", 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

$skill-installer install https://github.com/platonai/Browser4/tree/main/browser4-agentic/src/main/resources/skills/form-filling

Type 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.

skills CLI

$ npx skills add platonai/Browser4 --skill form-filling -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install platonai/Browser4 form-filling --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/platonai/Browser4.git skills-src && mkdir -p .agents/skills && cp -r skills-src/browser4-agentic/src/main/resources/skills/form-filling .agents/skills/form-filling && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "form-filling" agent skill from https://github.com/platonai/Browser4/tree/main/browser4-agentic/src/main/resources/skills/form-filling into .agents/skills/form-filling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-filling", 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.

skills CLI

$ npx skills add platonai/Browser4 --skill form-filling -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install platonai/Browser4 form-filling --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/platonai/Browser4.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/browser4-agentic/src/main/resources/skills/form-filling .cursor/skills/form-filling && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "form-filling" agent skill from https://github.com/platonai/Browser4/tree/main/browser4-agentic/src/main/resources/skills/form-filling into .cursor/skills/form-filling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-filling", 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

$ gemini skills install https://github.com/platonai/Browser4.git --path browser4-agentic/src/main/resources/skills/form-filling

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add platonai/Browser4 --skill form-filling -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install platonai/Browser4 form-filling --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/platonai/Browser4.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/browser4-agentic/src/main/resources/skills/form-filling .gemini/skills/form-filling && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "form-filling" agent skill from https://github.com/platonai/Browser4/tree/main/browser4-agentic/src/main/resources/skills/form-filling into .gemini/skills/form-filling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-filling", 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.

GitHub CLI

$ gh skill install platonai/Browser4 form-filling

Installs 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).

skills CLI

$ npx skills add platonai/Browser4 --skill form-filling -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/platonai/Browser4.git skills-src && mkdir -p .github/skills && cp -r skills-src/browser4-agentic/src/main/resources/skills/form-filling .github/skills/form-filling && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "form-filling" agent skill from https://github.com/platonai/Browser4/tree/main/browser4-agentic/src/main/resources/skills/form-filling into .github/skills/form-filling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-filling", 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.

skills CLI

$ npx skills add platonai/Browser4 --skill form-filling -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install platonai/Browser4 form-filling --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/platonai/Browser4.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/browser4-agentic/src/main/resources/skills/form-filling .opencode/skills/form-filling && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "form-filling" agent skill from https://github.com/platonai/Browser4/tree/main/browser4-agentic/src/main/resources/skills/form-filling into .opencode/skills/form-filling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "form-filling", 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: form-filling
GitHub stars: 1.2k
Token cost: ~1.1k tokens
SKILL.md length: 362 words
Files: 5 (incl. scripts, references, assets)
Skills in repo: 17
Repo updated: Oct 9, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Automatically fills web forms using provided field data and can optionally submit the form.

Automating form input
SKILL.md covers Description, Dependencies, Parameters and Return Value, plus 7 more sections
Submitting structured data to websites

What it does

Form Filling is an agent skill from platonai/Browser4. Automatically fills web forms using provided field data and can optionally submit the form. Use when automating form input, testing forms, or submitting structured data to websites.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including scripts, reference files and assets (for example `assets/config.json`, `assets/form-data-template.md` and `references/developer-guide.md`).

It sits in Documents & Office, covering Forms and invoices and Schema markup. The repository describes itself as: Browser4 — an AI-native browser engine for autonomous agents, intelligent extraction, and large-scale web automation. The licence is Apache-2.0.

When your agent uses it

Automating form input
Submitting structured data to websites

Example prompts

“/form-filling”

What it can do on your machine

Read from SKILL.md and the folder at commit 0fdba82. 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 1 file in scripts/, which the agent can run.
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

Form Filling loads about 1.1k tokens when it runs, and up to ~2.5k if it reads all its reference files. Until then it costs about 49 tokens; SKILL.md has 362 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~49
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~2.5k

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

The full file from platonai/Browser4 at commit 0fdba82, republished under its Apache-2.0 licence (© platonai). 362 words, ~1,054 tokens.

Download SKILL.mdSave it as .claude/skills/form-filling/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.

name: form-filling
description: Automatically fills web forms using provided field data and can optionally submit the form. Use when automating form input, testing forms, or submitting structured data to websites.
metadata.displayName: Form Filling
metadata.version: 1.0.0
metadata.author: Browser4
metadata.tags: forms, automation, input
metadata.dependencies: web-scraping

Form Filling Skill

Description

Automatically fill web forms with provided data. This skill handles various form field types and can optionally submit the form after filling.

Dependencies

web-scraping - Required for detecting form fields and structure

Parameters

Parameter	Type	Required	Default	Description
url	String	Yes	-	The URL of the page containing the form
formData	Map<String, String>	Yes	-	Key-value pairs representing field names and values
submit	Boolean	No	false	Whether to submit the form after filling

Return Value

Returns a SkillResult with the following data structure:

json

{
  "url": "string",
  "filledFields": ["field1", "field2"],
  "submitted": boolean,
  "message": "status message"
}

Usage Examples

Basic Form Filling

kotlin

val result = registry.execute(
    skillId = "form-filling",
    context = context,
    params = mapOf(
        "url" to "https://example.com/contact",
        "formData" to mapOf(
            "name" to "John Doe",
            "email" to "john@example.com",
            "message" to "Hello!"
        )
    )
)

Form Filling with Submission

kotlin

val result = registry.execute(
    skillId = "form-filling",
    context = context,
    params = mapOf(
        "url" to "https://example.com/signup",
        "formData" to mapOf(
            "username" to "johndoe",
            "password" to "securepass123",
            "email" to "john@example.com"
        ),
        "submit" to true
    )
)

Tool Call Specification

kotlin

ToolSpec(
    domain = "skill.form",
    method = "fill",
    arguments = [
        "url: String",
        "formData: Map<String, String>",
        "submit: Boolean = false"
    ],
    returnType = "SkillResult",
    description = "Fill a web form with the provided data"
)

Error Handling

The skill returns a failure result in the following cases:

Missing required parameter url
Missing required parameter formData
Empty formData map
Form fields not found on the page

Lifecycle Hooks

onBeforeExecute

Validates that formData is not empty before execution.

validate

Checks if the required dependency skill (web-scraping) is available in the registry.

Implementation Notes

Headless mode is the default for AI agents: Always open browsers in headless mode unless the user explicitly requests a visible browser window (e.g., "show me the browser", "open visibly", "headed"). Headless mode is faster, uses fewer resources, and avoids unnecessary GUI windows. If user participation in the page interaction is required — e.g., logging in or entering a verification code (CAPTCHA) — open a headed browser so the user can see and act on the page. Also open headed as a one-shot escalation when the site blocks the headless browser as a bot (CAPTCHA/challenge/interstitial page, "unusual traffic", or an empty body where content was expected): close, then open --headed <url> with the same session and retry once, telling the user that anti-bot protection forced the switch. If the headed retry is blocked too, stop and report instead of looping.
Supports various input types: text, email, password, textarea, select, checkbox, radio
Automatically handles form field detection and mapping
Respects CSRF tokens and hidden fields
Can handle multi-page forms through shared context
Thread-safe execution

Show full SKILL.md (39 more words)Show less

Security Considerations

Never log sensitive form data (passwords, credit cards, etc.)
Validate form URLs to prevent CSRF attacks
Use HTTPS URLs for sensitive forms
Clear sensitive data from memory after use

Files

SKILL.md and 4 other files (scripts, references, assets) in browser4-agentic/src/main/resources/skills/form-filling of platonai/Browser4.

SKILL.md
assets/config.json
assets/form-data-template.md
references/developer-guide.md
scripts/example-usage.kts

Open the folder on GitHubat commit 0fdba82

Compare with similar skills

Form Filling 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.

Form Filling compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Form Filling this skillplatonai/Browser4	1.2k	—	~1.1k	Automated safety check: Pass	Apache-2.0	today
Glmocr SDKzai-org/GLM-skills	476	—	~2.7k	Automated safety check: Notes	Apache-2.0	5 mo ago
Veryfi Documents AILeoYeAI/openclaw-master-skills	2.2k	—	~6.1k	Automated safety check: Pass	MIT	2 mo ago
Extracting Structured DataGAIK-project/gaik-toolkit	100	—	~3.2k	Automated safety check: Pass	MIT	yesterday
Azure AI Document Intelligence Dotnetmicrosoft/skills	3.1k	5 repos	~3k	Automated safety check: Pass	MIT	today
Azure AI Document Intelligence TSmicrosoft/skills	3.1k	5 repos	~2.4k	Automated safety check: Pass	MIT	today

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Questions about Form Filling

What does Form Filling do?

Automatically fills web forms using provided field data and can optionally submit the form. Form Filling is an agent skill from platonai/Browser4. Automatically fills web forms using provided field data and can optionally submit the form.

When should I use Form Filling?

Form Filling fits situations like: automating form input; submitting structured data to websites.

How do I install Form Filling in Claude Code?

Run `npx skills add platonai/Browser4 --skill form-filling -a claude-code`. Or copy the skill folder (browser4-agentic/src/main/resources/skills/form-filling in platonai/Browser4) into .claude/skills/form-filling in your project. Claude Code loads it when a task matches its description.

How do I install Form Filling in Codex?

Run `npx skills add platonai/Browser4 --skill form-filling -a codex`. Or copy the skill folder (browser4-agentic/src/main/resources/skills/form-filling in platonai/Browser4) into .agents/skills/form-filling in your project. Codex loads it when a task matches its description.

Can I use Form Filling 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 platonai/Browser4 --skill form-filling -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/form-filling, .gemini/skills/form-filling, .github/skills/form-filling and .opencode/skills/form-filling in your project.

What does Form Filling need to run?

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

Does Form Filling 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 Form Filling 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 Form Filling use?

Form Filling 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 Form Filling use?

About 1.1k tokens (SKILL.md is roughly 4.2k 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 1.4k tokens, read only when the agent opens those files.

What are the alternatives to Form Filling?

Skills that share tags, products or a category with Form Filling: Glmocr SDK (zai-org/GLM-skills, 476 stars), Veryfi Documents AI (LeoYeAI/openclaw-master-skills, 2.2k stars), Extracting Structured Data (GAIK-project/gaik-toolkit, 100 stars) and Azure AI Document Intelligence Dotnet (microsoft/skills, 3.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Form Filling?

platonai (a GitHub user) maintains it in platonai/Browser4, which has 1,153 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 9, 2026.

Source: platonai/Browser4 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Form Filling

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Form Filling Skill

Description

Dependencies

Parameters

Return Value

Usage Examples

Basic Form Filling

Form Filling with Submission

Tool Call Specification

Error Handling

Lifecycle Hooks

onBeforeExecute

validate

Implementation Notes

Security Considerations

See Also

Files

Compare with similar skills

Similar skills

More from platonai/Browser4

Related

Questions about Form Filling