browser4-dev SKILL.md skillA
browser4-dev from platonai/browser4 is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add platonai/browser4/browser4-dev@git:20260826.ac7c2f1Pins git:20260826.ac7c2f1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- platonai/browser4
- Path
skills/browser4-dev/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260826.ac7c2f1, committed Aug 26, 2026
- First version recorded
- Aug 14, 2026
- Size
- 9,125 bytes
- Repository stars
- 1,164
- License
- Apache-2.0
Develop features inside the Browser4 repository itself: add CLI commands, agent tool domains, REST endpoints, tests, and skills; analyze impact, plan dev tasks, check CDP pitfalls, and verify builds. Use when the user asks to add a new browser4-cli command, new tool domain, REST endpoint, modify Browser4's own Kotlin/Rust code, or check which modules a change affects.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# browser4-dev ## Quick Start Add a new `browser4-cli` command with one call: ```text coding.scaffoldFlow(type="b4-cli-command", name="my-command", verify=true) ``` `scaffoldFlow` generates the whole chain — `commands.rs` CommandDef, backend MCP alias, tool executor, and test — from a single name; `verify=true` runs the type-appropriate build check. For other work (agent tool, REST endpoint, test class, skill), use the matching `type` and see Workflows below. Develop features inside the Browser4 repository itself, following the repository's own conventions (AGENTS.md) — with multi-file skeletons generated from the repository's real reference implementations, so the output never goes stale. ## When to Use - User wants to add a new `browser4-cli` command - User wants to add a new agent tool domain (plugin tool) - User wants to add a REST endpoint (Controller + Service) - User wants to add a test class or a skill - User wants to modify Browser4's own Kotlin/Rust code and verify it compiles - User wants to know which modules a change affects, or plan a whole dev task ## How It Works …
Read the whole file at its exact version.
How to install
mdr add platonai/browser4/browser4-dev@sha256:4c1fc72223604d3aThe line at the top of this page pins the label git:20260826.ac7c2f1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_uyarmbaia24zqyxg)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Aug 14, 2026 and Aug 26, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260826.ac7c2f1 latest | 2026-08-26 | ac7c2f1 | 9,125 B | A | view · diff |
| git:20260816.f061e8c | 2026-08-16 | f061e8c | 7,198 B | A | view · diff |
| git:20260815.2913ba8 | 2026-08-15 | 2913ba8 | 7,158 B | A | view · diff |
| git:20260815.2892e9a | 2026-08-15 | 2892e9a | 6,923 B | A | view · diff |
| git:20260814.e950b9c | 2026-08-14 | e950b9c | 4,362 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9125 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
platonai/browser4 · 1,164 stars · license Apache-2.0 · pushed 2026-10-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_uyarmbaia24zqyxg GET https://markdownregistry.com/api/v1/resolve?ref=platonai/browser4/browser4-dev GET https://markdownregistry.com/api/v1/blob/4c1fc72223604d3ac1394f90162f639dd48f7fe2acc2edfc55957c6f8f875ee2
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.