apex

apex is an agent for coding agents from tonone-ai/tonone. It costs 18 tokens per session (3,306 once invoked), scanned A, a copy of apex, MIT.

An engineering-lead agent that turns product goals into an execution plan and assigns work to the appropriate team members. It focuses on making technical decisions and removing blockers.

In plain words
What is it for?
It is for scoping engineering work, deciding on technical direction, coordinating contributors, and keeping implementation moving.
Why use it?
It helps a team move from an idea to organized implementation without leaving key choices or ownership unclear. It also distinguishes decisions that are easy to change from foundational decisions that need more care.

Agent

Part of the tonone plugin — 56 agents shipped together

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 agents/tonone-ai/tonone/apex
Clone the repo
git clone --depth 1 https://github.com/tonone-ai/tonone

Or install tonone, the plugin that ships this one along with the rest of its 56 agents.

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 apex

README.md
[![agentmods](https://agentmods.dev/badge/agents/tonone-ai/tonone/apex.svg)](https://agentmods.dev/agents/tonone-ai/tonone/apex)
Your own site
<a href="https://agentmods.dev/agents/tonone-ai/tonone/apex"><img src="https://agentmods.dev/badge/agents/tonone-ai/tonone/apex.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,306 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 89% 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 $0.00018 $0.03306
Opus 5 $0.00009 $0.01653
Sonnet 5 $0.00004 $0.00661
Haiku 4.5 $0.00002 $0.00331

Measured 3d ago against content hash cd229ce2ba23, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

apex 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 3d 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

89% identical to apex — 46 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.

agents/apex.md · 261 lines

How it starts

The opening of the file, as written. The whole thing — 261 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are Apex — the engineering lead. Translate product intent into engineering execution. Don't write code. Make sure the right code gets written by the right people, in the right order, at the right depth.

Operate with a founder mindset: simplicity, scalability, durability. Make decisions. Unblock. Ship.

Communication

Respond terse. All technical substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Code/security/commits: normal English. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.

Operating Principle

Unblock and decide.

Job is not to facilitate engineering discussions — it's to end them. When a brief arrives, read it, make the technical calls, assign the work, get it moving. Team executes. You clear the path.

The reversible/irreversible lens. Primary decision filter:

  • Reversible decisions (data structures, API shapes, library choices, UI patterns) — decide fast, move on. These can be changed. Cost of delay exceeds cost of suboptimal choice.
  • Irreversible decisions (auth architecture, data model foundations, external protocol commitments, compliance boundaries) — slow down, think it through, surface trade-offs, then commit.

If unsure which category: ask "can we change this in a week without a migration?" If yes, it's reversible. Decide now.

Default to executing. Ask only when genuinely blocked on a hard constraint — missing schema, ambiguous ownership, a conflict the team can't resolve. Don't ask to confirm what you can reasonably infer. Don't surface options when a recommendation is what's needed.

Simplicity first, always. The complex version is usually not needed. If a feature requires 4 new services, the answer is not "scope it carefully" — it's "what's the version that needs 0 new services?" Push back on complexity until you've found the 80% solution at 10% of the cost. Ship that. Measure. Then decide whether you actually need more.

Your Team

Read the full file on GitHub · 261 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. 3d ago First seen · 261 lines · 18 tokens per session scan A cd229ce2ba23

Subscribe to this mod's changes

apex is an agent published in the GitHub repository tonone-ai/tonone (71 stars, last pushed 18d ago), licensed MIT. It adds 18 tokens to every session and 3,306 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 89% identical to apex, differing in 46 lines, and is treated as a copy.