opencode-simple: Skill for OpenCode

.opencode/skills/agentic-engineering/SKILL.md

agentic-engineering is a skill for OpenCode from zhmxiaowo/opencode-simple. It costs 24 tokens per session (367 once invoked), scanned A, a copy of agentic-engineering, MIT.

A way to run software-engineering work as a sequence of small, checkable tasks handled by AI agents. It defines what success means, splits work by complexity, and uses evaluations to compare results.

In plain words
What is it for?
Use it to plan and execute agent-led implementation, refactoring, or debugging. It helps choose an appropriate model tier, divide work into independently verifiable units, and check the result.
Why use it?
It reduces the risk of unmeasured or poorly scoped AI changes by requiring clear completion criteria, regression checks, and review of edge cases.

Skill for OpenCode

Written for OpenCode: installed under .opencode/. Also seen: mentions OpenCode.

This is zhmxiaowo/opencode-simple's own configuration. It tells OpenCode how to work on opencode-simple itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything opencode-simple configures →

Reuse

Borrowing it

Nothing to install: this file belongs to zhmxiaowo/opencode-simple. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/zhmxiaowo/opencode-simple/main/.opencode/skills/agentic-engineering/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/zhmxiaowo/opencode-simple

Made for: OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for agentic-engineering

README.md
[![agentmods](https://agentmods.dev/badge/skills/zhmxiaowo/opencode-simple/agentic-engineering/github.svg)](https://agentmods.dev/skills/zhmxiaowo/opencode-simple/agentic-engineering)
Your own site
<a href="https://agentmods.dev/skills/zhmxiaowo/opencode-simple/agentic-engineering"><img src="https://agentmods.dev/badge/skills/zhmxiaowo/opencode-simple/agentic-engineering/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for agentic-engineering

Your own site · 80×15
<a href="https://agentmods.dev/skills/zhmxiaowo/opencode-simple/agentic-engineering"><img src="https://agentmods.dev/badge/skills/zhmxiaowo/opencode-simple/agentic-engineering.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 367 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 92% copy Near-identical to another mod 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 5.1 $0.00024 $0.00367
Opus 5.5 $0.00010 $0.00147
Sonnet 5.5 $0.00005 $0.00073
Haiku 4.5 $0.00002 $0.00037

Measured 1mo ago against content hash 985a5cb1287e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agentic-engineering scanned grade A with 0 findings 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 1mo ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

92% identical to agentic-engineering — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.opencode/skills/agentic-engineering/SKILL.md · 66 lines

What it actually says

Agentic Engineering

Use this skill for engineering workflows where AI agents perform most implementation work and humans enforce quality and risk controls.

Operating Principles

  1. Define completion criteria before execution.
  2. Decompose work into agent-sized units.
  3. Route model tiers by task complexity.
  4. Measure with evals and regression checks.

Eval-First Loop

  1. Define capability eval and regression eval.
  2. Run baseline and capture failure signatures.
  3. Execute implementation.
  4. Re-run evals and compare deltas.

Task Decomposition

Apply the 15-minute unit rule:

  • each unit should be independently verifiable
  • each unit should have a single dominant risk
  • each unit should expose a clear done condition

Model Routing

  • Haiku: classification, boilerplate transforms, narrow edits
  • Sonnet: implementation and refactors
  • Opus: architecture, root-cause analysis, multi-file invariants

Session Strategy

  • Continue session for closely-coupled units.
  • Start fresh session after major phase transitions.
  • Compact after milestone completion, not during active debugging.

Review Focus for AI-Generated Code

Prioritize:

  • invariants and edge cases
  • error boundaries
  • security and auth assumptions
  • hidden coupling and rollout risk

Do not waste review cycles on style-only disagreements when automated format/lint already enforce style.

Cost Discipline

Track per task:

  • model
  • token estimate
  • retries
  • wall-clock time
  • success/failure

Escalate model tier only when lower tier fails with a clear reasoning gap.

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. 1mo ago First seen · 66 lines · 24 tokens per session scan A 985a5cb1287e

Subscribe to this mod's changes

agentic-engineering is a skill published in the GitHub repository zhmxiaowo/opencode-simple (2 stars, last pushed 7mo ago), licensed MIT. It adds 24 tokens to every session and 367 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to agentic-engineering, differing in 4 lines, and is treated as a copy.

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