fullstack-starter: Instructions file for Claude Code

AGENTS.md

fullstack-starter AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from first-fluke/fullstack-starter. It costs 1,029 tokens per session, scanned A, original, MIT.

A project instruction file for a full-stack starter repository. It describes the repository structure, coding workflows, search rules, and how specialized agents are used.

In plain words
What is it for?
Use it to guide code searches, agent selection, change handling, and other work in that repository.
Why use it?
It gives coding agents project-specific rules so their work follows the repository's organization and workflow.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: PreToolUse hook event, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions subagents; mentions Claude Code.

This is first-fluke/fullstack-starter's own configuration. It tells Claude Code, Codex and OpenCode how to work on fullstack-starter 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 fullstack-starter configures →

Reuse

Borrowing it

Nothing to install: this file belongs to first-fluke/fullstack-starter. 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/first-fluke/fullstack-starter/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/first-fluke/fullstack-starter

Made for: Claude Code, Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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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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Per session 1,029 This file is loaded in full into every session.
When invoked 1,029 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 $0.01029 $0.01029
Opus 5.5 $0.00412 $0.00412
Sonnet 5.5 $0.00206 $0.00206
Haiku 4.5 $0.00103 $0.00103

Measured 19d ago against content hash 90d5a7c20457, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fullstack-starter 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 19d 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 · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

oh-my-agent

Follow .agents/skills/_shared/core/execution-policy.md for authorization, clarification, verification, and completion. System/developer instructions and the user's request take precedence over OMA defaults. Never build, compile, bundle, or package software unless the user explicitly requests a build.

  • SSOT: Do not modify .agents/ definitions (skills, workflows, rules, agents, config) directly. Run outputs under .agents/results/ and .agents/state/ are generated artifacts and may be written.
  • Response language: Follow language in .agents/oma-config.yaml.
  • Skills: Read the relevant .agents/skills/{name}/SKILL.md when needed.
  • Subagents:
    • claude: Same-vendor native dispatch via Claude Code Agent tool with .claude/agents/{name}.md; cross-vendor fallback via oma agent spawn
    • codex: Same-vendor native dispatch via Codex custom agents in .codex/agents/{name}.toml; cross-vendor fallback via oma agent spawn
    • cursor: @agent-name (defined in .cursor/agents/)
    • qwen: Same-vendor native dispatch via Qwen Code subagents in .qwen/agents/{name}.md; cross-vendor fallback via oma agent spawn
    • pi: pi has no native subagent API; use oma agent spawn {agent} {prompt} {sessionId} --vendor pi for CLI subprocess dispatch
  • Write non-ASCII tool-call parameters as literal UTF-8, not Unicode escapes.

Per-Agent Dispatch

Resolve each agent from .agents/oma-config.cue or .agents/oma-config.yaml, overlaid by .agents/oma-config.local.cue or .agents/oma-config.local.yaml when present. With model_preset: free, always use oma agent spawn so the subprocess receives the FreeLLMAPI route; free.model replaces per-agent model pins. Otherwise, explicit agents: overrides take priority. With model_preset: auto, follow the current vendor's native agent/model settings; use default_cli only when the runtime is unknown. Use native subagents when the target matches the current runtime; otherwise, or when native dispatch is unavailable, use oma agent spawn.

Read the full file on GitHub · 57 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. 19d ago Changed · -22 tokens per session 90d5a7c20457
  2. 1mo ago Changed · +2 lines · +51 tokens per session b9b084218d79
  3. 1mo ago Changed · -58 lines · -886 tokens per session e5cafb225c2e
  4. 1mo ago Changed · +7 lines · +301 tokens per session 9802e56ebc2d
  5. 1mo ago First seen · 106 lines · 1,585 tokens per session scan A 18f0ea2c13d5

Subscribe to this mod's changes

fullstack-starter AGENTS.md is an instructions file published in the GitHub repository first-fluke/fullstack-starter (224 stars, last pushed 6d ago), licensed MIT. It adds 1,029 tokens to every session, about $0.0041 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 2026-09-03.

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