opencode-tools

A guide to OpenCode's built-in tools and extension points. OpenCode is a coding assistant that can read and edit files, run commands, search code, use web tools, and connect to MCP services.

In plain words
What is it for?
Use it when configuring tool permissions, working with file and shell tools, creating custom TypeScript or JavaScript tools, or connecting MCP integrations.
Why use it?
It explains what each tool does and how permissions control actions that may need approval.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/timmy6942025/opencode-builder-skill/opencode-tools
Any agent
npx skills add Timmy6942025/opencode-builder-skill --skill opencode-tools
Clone the repo
git clone --depth 1 https://github.com/Timmy6942025/opencode-builder-skill

Made for: Claude Code, Codex.

Per session 86 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,182 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00086 $0.07182
Opus 5 $0.00043 $0.03591
Sonnet 5 $0.00017 $0.01436
Haiku 4.5 $0.00009 $0.00718

Measured yesterday against content hash beeeb0cbbc3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

opencode-tools scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- `"rm *"` — matches `rm file.txt`, `rm -rf dir/`
skills/opencode-tools/SKILL.md · 993 lines

How it starts

The opening of the file, as written. The whole thing — 993 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenCode Tools

📚 Official Docs: For the latest information, always refer to the official documentation: https://opencode.ai/docs/tools/ and https://opencode.ai/docs/custom-tools/

OpenCode provides a set of built-in tools that let LLMs interact with your codebase. You can extend functionality with custom tools or MCP server integrations. All tools are enabled by default and don't require permission unless configured otherwise.

Tools allow the LLM to perform actions: reading files, editing code, running shell commands, searching content, fetching web pages, asking questions, and more. Permissions control which actions require approval.


Table of Contents

Read the full file on GitHub · 993 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 993 lines · 86 tokens per session scan C beeeb0cbbc3d

Subscribe to this mod's changes

opencode-tools is a skill published in the GitHub repository Timmy6942025/opencode-builder-skill (2 stars, last pushed 3mo ago), licensed MIT. It adds 86 tokens to every session and 7,182 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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