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Creating OpenCode Agents · majiayu000 | DecimalAI

agent toolingby majiayu000

Creating OpenCode Agents

majiayu000/creating-opencode-agents

Source majiayu000/claude-skill-registry ↗License MIT

Use when creating OpenCode agents - provides markdown format with YAML frontmatter, mode/tools/permission configuration, and best practices for specialized AI assistants

SkillScore100Maintained

Automatic

AI Engineer pack

Last verified 8/19/2026

What it changes

Passed 21 of 21 test cases with the skill, and 11 of 21 without it.

Without skill55%

With skill100%

Checks it passed that the model alone missed

Sets mode to subagent
Sets permission.edit to deny
Sets subtype to agent in prpm.json

and 14 more in the full report

10 fixed12 passed either way0 still failing0 broke

Pass-rate lift: +45 pp
Tokens: +83%
Agent turns: 0%
Response time: -49%

Model gemini-3.6-flashMeasured 8/19/2026v122 of 22 cases passed with skill · 21 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/majiayu000-creating-opencode-agents/SKILL.md https://app.decimal.ai/s/majiayu000-creating-opencode-agents/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add majiayu000-creating-opencode-agents, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/majiayu000-creating-opencode-agents/ and pins it in .decimal/skills.lock

decimalai skills add majiayu000-creating-opencode-agents

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/majiayu000-creating-opencode-agents/SKILL.md https://app.decimal.ai/s/majiayu000-creating-opencode-agents/SKILL.md

Raw file: /s/majiayu000-creating-opencode-agents/SKILL.md ↗ · machine-readable summary at /s/majiayu000-creating-opencode-agents.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 9

Prompt

In an OpenCode agent frontmatter, I want to reference a prompt stored in an external file at `./prompts/reviewer.txt` instead of writing it inline. What is the precise syntax string value for the prompt key?

What was checked, without and with the skill
Checked	Without skill	With skill
Uses the syntax format {file:./prompts/reviewer.txt}	Missed	Passed

case-13 · gemini-3.6-flash · 8/19/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md339 linessingle file

Creating OpenCode Agents

Expert guidance for creating OpenCode AI agents with proper configuration, tools, and permissions.

When to Use

Use when:

User asks to create an OpenCode agent
Need specialized AI assistant for specific tasks
Building domain-focused development tools
Configuring agent tools and permissions

Don't use for:

OpenCode plugins (use creating-opencode-plugins skill)
OpenCode slash commands (different format)
Generic AI prompts (not OpenCode-specific)

Quick Reference

File Location

Project: .opencode/agent/<name>.md
Global: ~/.config/opencode/agent/<name>.md

Minimal Agent Structure

---
description: Brief explanation of the agent's purpose
mode: all
---

System prompt content here...

Required Fields

description (string): Brief explanation of the agent's purpose (REQUIRED)

Optional Fields

Field	Type	Description
`mode`	`primary` \| `subagent` \| `all`	How agent can be used (default: `all`)

Track record

Benchmark

21 / 21

test cases passed, vs 11 / 21 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

majiayu000 / claude-skill-registry

skills/agent/creating-opencode-agents-pr-pm-prpm/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

Creating OpenCode Agents

When to Use

Quick Reference

File Location

Minimal Agent Structure

Required Fields

Optional Fields

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills