using-forge

A routing guide for ArcForge work, where ArcForge is a set of skills for handling production-system tasks. It chooses the responsible skill, the work mode, and any companion skills before domain work begins.

In plain words
What is it for?
Use it for tasks involving production systems or several areas, such as checkout, signup, tenant isolation, migrations, releases, or incident follow-up.
Why use it?
It prevents multi-part requests from being handled by an incomplete or unsuitable workflow.

Skill for Claude CodeCodex

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 skills/d4rkninja/arcforge/using-forge
Any agent
npx skills add d4rkNinja/arcforge --skill using-forge
Clone the repo
git clone --depth 1 https://github.com/d4rkNinja/arcforge

Made for: Claude Code, Codex.

Per session 107 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,824 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00107 $0.02824
Opus 5 $0.00053 $0.01412
Sonnet 5 $0.00021 $0.00565
Haiku 4.5 $0.00011 $0.00282

Measured 2d ago against content hash 200b0d3324dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

using-forge 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 2d 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.

skills/using-forge/SKILL.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Using Forge

The entry point for the ArcForge skill set. It reads a request, decides which skill owns it, decides the mode, resolves the companion skills that request actually needs, and puts them in a safe order before any domain work starts.

This skill routes. It does not answer the domain question itself.

Core principle: A request has one owner per surface, a mode, and a companion set. Name all three before work starts, or the request gets a partial answer from whichever skill happened to activate.

Routing Law

NO DOMAIN WORK WITHOUT:
1. the requested outcome and the affected surfaces identified;
2. one owning skill chosen per surface, not one skill for the whole request;
3. the mode chosen from what the user actually wants: decide, inspect, apply, or prove;
4. required companions resolved before the owner they constrain, not after it finishes;
5. missing or uninstalled depth named with its exact technical ID.

When to Use

Use this skill when:

  • a request touches production system work and no skill has been named;
  • a request spans more than one domain and the full set is not obvious — checkout, signup, tenant isolation, migration, release, incident follow-up;
  • the owning skill is clear but the mode is not, or a mode was assumed and the answer came back at the wrong altitude;
  • a previous answer covered one domain and silently skipped an adjacent one;
  • a companion skill is needed but which one, and in what order, is unresolved;
  • part of the needed depth may not be installed and the route must stay honest about that.

When Not to Use

  • When the user already named a skill, use that skill directly. Do not re-route a settled request.
  • When one domain plainly owns the request and no companion is in question, invoke that skill directly. Routing a single-domain request adds a step and no coverage.
  • When the route is the whole question and nothing should be inspected or changed, use think-forge.
  • When think-forge has already returned a route in the current user turn, do not re-enter this skill. Wait for an explicit later-turn request to continue into work.
  • When an independent approval verdict is wanted, use architecture-review-gate. Routing is not review.
  • For the domain decision itself, hand off. This skill never substitutes its own answer for the owning skill's work.

Read the full file on GitHub · 171 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 171 lines · 107 tokens per session scan A 200b0d3324dc

Subscribe to this mod's changes

using-forge is a skill published in the GitHub repository d4rkNinja/arcforge (16 stars, last pushed 6d ago), licensed MIT. It adds 107 tokens to every session and 2,824 once invoked, about $0.0005 per session on Opus 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 2026-08-30.