enhanced-opencode-prompt-stack: Instructions file for Codex

AGENTS.md

enhanced-opencode-prompt-stack AGENTS.md is an instructions file for Codex, OpenCode from jonanderson10/enhanced-opencode-prompt-stack. It costs 576 tokens per session, scanned A, original, MIT.

A set of custom instructions and prompts for OpenCode, a coding-agent tool. It covers build and planning modes, project safety, verification, Git practices, and code quality.

In plain words
What is it for?
Use it to customize OpenCode's built-in prompts and provide repository instructions through AGENTS.md. It is designed specifically for OpenCode and is not described as portable to other agent tools.
Why use it?
It gives OpenCode consistent guidance for how to plan and modify code, while keeping shared prompts and workflow rules organized.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths; mentions Claude Code; mentions AGENTS.md.

This is jonanderson10/enhanced-opencode-prompt-stack's own configuration. It tells Codex and OpenCode how to work on enhanced-opencode-prompt-stack 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 enhanced-opencode-prompt-stack configures →

Reuse

Borrowing it

Nothing to install: this file belongs to jonanderson10/enhanced-opencode-prompt-stack. 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/jonanderson10/enhanced-opencode-prompt-stack/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/jonanderson10/enhanced-opencode-prompt-stack

Made for: Codex, 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 enhanced-opencode-prompt-stack AGENTS.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/jonanderson10/enhanced-opencode-prompt-stack/agents-md"><img src="https://agentmods.dev/badge/instructions/jonanderson10/enhanced-opencode-prompt-stack/agents-md/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.

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<a href="https://agentmods.dev/instructions/jonanderson10/enhanced-opencode-prompt-stack/agents-md"><img src="https://agentmods.dev/badge/instructions/jonanderson10/enhanced-opencode-prompt-stack/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 576 This file is loaded in full into every session.
When invoked 576 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00576 $0.00576
Opus 5.5 $0.00230 $0.00230
Sonnet 5.5 $0.00115 $0.00115
Haiku 4.5 $0.00058 $0.00058

Measured 2mo ago against content hash bd57f12a2449, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

enhanced-opencode-prompt-stack AGENTS.md 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 2mo 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.

AGENTS.md · 29 lines

How it starts

The opening of the file, as written. The whole thing — 29 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository: Enhanced OpenCode Prompt Stack

A model-agnostic prompt replacement for OpenCode's built-in build and plan agent prompts, paired with a workflow-layer AGENTS.md for safety, verification, git hygiene, and code quality. The stack is tightly coupled to OpenCode as a harness — it is not portable to other agent harnesses.

Repo Structure

  • src/prompts/custom.txt — shared base prompt for all models (replaces OpenCode's gpt.txt, kimi.txt, anthropic.txt, default.txt)
  • src/prompts/build-specific.txt — build-mode additions
  • src/prompts/plan-specific.txt — plan-mode additions
  • src/AGENTS.md — the distributed AGENTS.md that ships to users (copied to ~/.config/opencode/AGENTS.md or project root)
  • docs/research.md — research sources and how they map to prompt files
  • README.md — canonical project documentation

Key Facts for Agents

  • No build, test, lint, or CI pipeline. This repo is prompt and markdown content only. There are no automated checks to run.
  • src/AGENTS.md is the product. Edits to it affect what all downstream users receive. Understand the three-layer architecture (base prompt, mode prompt, workflow instructions) before modifying it.
  • Verification is manual. After editing prompts, the user confirms with opencode debug agent build and opencode debug agent plan to inspect resolved agent prompts. There is no script to run.
  • No code to typecheck or lint. The .txt prompt files and .md files have no automated format enforcement. Match the existing style: concise, direct, no fluff.
  • The global AGENTS.md at ~/.config/opencode/AGENTS.md may differ from src/AGENTS.md. The global one is the installed copy; src/AGENTS.md is the source of truth for this repo.
  • .claude/settings.local.json exists — Claude Code settings are present. Respect them.

Editing Conventions

  • Prompt files (src/prompts/*.txt) are terse and instruction-dense. Preserve that style.
  • src/AGENTS.md is structured in sections with horizontal rules. Add new rules within the appropriate section; don't create new top-level sections without reason.
  • When changing prompt behavior, consider all three files: the change may belong in custom.txt (universal) or in a mode-specific file (build or plan only).
  • README.md documents the architecture, installation, and rationale. Update it if your change alters how the system works.

Read the full file on GitHub · 29 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. 2mo ago First seen · 29 lines · 576 tokens per session scan A bd57f12a2449

Subscribe to this mod's changes

enhanced-opencode-prompt-stack AGENTS.md is an instructions file published in the GitHub repository jonanderson10/enhanced-opencode-prompt-stack (3 stars, last pushed 1mo ago), licensed MIT. It adds 576 tokens to every session, about $0.0023 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

enhanced-opencode-prompt-stack AGENTS.md compared with instructions from other repositories

enhanced-opencode-prompt-stack AGENTS.md next to 6 instructions from other repositories
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enhanced-opencode-prompt-stack AGENTS.mdjonanderson10/enhanced-opencode-prompt-stackInstructions file31mo agoMITA576Codex, OpenCode
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deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode