What is apex-methodology?

A structured development workflow for features, bug fixes, refactors, and hotfixes. It moves through analysis, planning, execution, self-review, and code examination while enforcing project rules.

Use it when implementing, fixing, creating, refactoring, or developing code that needs documented analysis, a plan, execution checks, and a final examination.

It makes development tasks follow a repeatable process and checks constraints such as file size, interfaces, documentation, and review steps.

apex-methodology — Skill by fusengine

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/fusengine/agents/apex-methodology

Any agent

npx skills add fusengine/agents --skill apex-methodology

Clone the repo

git clone --depth 1 https://github.com/fusengine/agents

Made for: Claude Code, Codex.

Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,525 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.

Model	Per session	Once invoked
Fable 5	$0.00042	$0.01525
Opus 5	$0.00021	$0.00763
Sonnet 5	$0.00008	$0.00305
Haiku 4.5	$0.00004	$0.00153

Measured 2d ago against content hash 47e0c3cef6e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

apex-methodology 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.

plugins/ai-pilot/skills/apex-methodology/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

It enforces the project's hard constraints throughout: files under 100 lines (split at 90), interfaces kept out of component files, SOLID principles, and a mandatory sniper pass after every Edit/Write (blocked by PostToolUse hooks until it runs). Three modes control how much is automatic: --auto (default, no prompts), --manual (step-by-step confirmation), and --skip-elicit (bypasses the self-review phase).

Current Task: $ARGUMENTS

APEX Methodology Skill

Analyze → Plan → Execute → eLicit → eXamine

Complete development workflow for features, fixes, and refactoring.

Step 0: Initialize Tracking (MANDATORY FIRST ACTION)

BEFORE anything else, initialize APEX tracking — see references/init-tracking.md for the exact command.

This creates .claude/apex/task.json (documentation consultation status) and .claude/apex/docs/ (consulted documentation summaries). The PreToolUse hooks will BLOCK Write/Edit until documentation is consulted.

Workflow Overview

┌─────────────────────────────────────────────────────────────────┐
│                     APEX WORKFLOW                               │
├─────────────────────────────────────────────────────────────────┤
│  00-init-branch     → Create feature branch                     │
│  00.5-brainstorm    → Design-first questioning (B) ← NEW        │
│  01-analyze-code    → Understand codebase (A)                   │
│  02-features-plan   → Plan implementation (P)                   │
│  03-execution       → Write code with TDD (E) ← UPDATED        │
│  03.5-elicit        → Expert self-review (L)                    │
│  03.7-verification  → Functional resolution check (V) ← NEW    │
│  04-validation      → Verify quality (X)                        │
│  05-review          → Self-review                               │
│  06-fix-issue       → Handle issues                             │
│  07-add-test        → Write tests (TDD cycle)                   │
│  08-check-test      → Run tests                                 │
│  09-create-pr       → Create Pull Request                       │
└─────────────────────────────────────────────────────────────────┘

Read the full file on GitHub · 147 lines

Files

What ships with it

60 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.

2d ago First seen · 147 lines · 42 tokens per session scan A 47e0c3cef6e9

Subscribe to this mod's changes

apex-methodology is a skill published in the GitHub repository fusengine/agents (25 stars, last pushed 29d ago), licensed MIT. It adds 42 tokens to every session and 1,525 once invoked, about $0.0002 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.

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