encapsulation

encapsulation is a skill for Claude Code, Codex from jongwony/epistemic-protocols. It costs 84 tokens per session (1,668 once invoked), scanned A, original, MIT.

A read-only review procedure for checking whether plugin instructions and descriptions explain themselves without relying on contributor-only documentation. Plugin encapsulation means the user-facing instructions contain the knowledge needed to understand them.

In plain words
What is it for?
Auditing SKILL.md files and plugin metadata for unexplained contributor knowledge, unclear wording, and other self-containment problems.
Why use it?
A project can pass basic pattern checks while still using vague wording or hidden assumptions that confuse agents and users.

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/jongwony/epistemic-protocols/encapsulation
Any agent
npx skills add jongwony/epistemic-protocols --skill encapsulation
Clone the repo
git clone --depth 1 https://github.com/jongwony/epistemic-protocols

Made for: Claude Code, Codex.

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 encapsulation

README.md
[![agentmods](https://agentmods.dev/badge/skills/jongwony/epistemic-protocols/encapsulation.svg)](https://agentmods.dev/skills/jongwony/epistemic-protocols/encapsulation)
Your own site
<a href="https://agentmods.dev/skills/jongwony/epistemic-protocols/encapsulation"><img src="https://agentmods.dev/badge/skills/jongwony/epistemic-protocols/encapsulation.svg" alt="Measured on agentmods" height="20"></a>
Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,668 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 $0.00084 $0.01668
Opus 5 $0.00042 $0.00834
Sonnet 5 $0.00017 $0.00334
Haiku 4.5 $0.00008 $0.00167

Measured 5d ago against content hash 163abc9e3fe6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

encapsulation 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 5d 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.

.claude/skills/encapsulation/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Encapsulation Audit

The project-local instance of the semantic-audit engine (references/audit-engine.md). The shared mechanism — read-only Claude-judge review, the scope shape, severity calibration, self-application stance, and on-demand slash invocation — is defined in that engine document; read it for the parts this skill holds in common with its published siblings. Below is this instance's principle parameter and the one place its output schema extends the engine's base.

This instance audits LLM-facing prose for Plugin Encapsulation: the runtime contract surface (SKILL.md plus plugin description metadata) must be self-contained and intelligible without contributor documentation. Project-local — its principle is coupled to this repo's deterministic encapsulation check and contributor model, and so (unlike white-bear and zero-shot) it is not decouplable into a portable skill. Read-only: it emits structured findings and writes no fixes.

Purpose

Surface encapsulation drift that the deterministic verify check (artifact-self-containment BANNED patterns) cannot catch — prose that assumes contributor sidecar knowledge in plain language, or rephrases banned references to evade pattern matching. Findings are presented for review; the human author decides which to rewrite, mark as load-bearing, or dismiss.

Inputs

Manual invocation only (interactive /encapsulation):

  • The caller passes target file paths or a glob; with no argument, the skill enumerates the in-scope set under the working tree HEAD.
  • Files are read at their working-tree state — the post-edit, pre-commit content the contributor is about to ship.

Scope

The engine's scope shape applies, specialized to the runtime contract surface this principle governs:

In scope (the runtime contract surface where this principle applies):

  • */skills/*/SKILL.md — protocol and utility skill prose (full document; the runtime contract surface)
  • .claude-plugin/plugin.json description field — plugin description metadata (discovery/routing layer)

Read the full file on GitHub · 103 lines

Files

What ships with it

1 file 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. 5d ago First seen · 103 lines · 84 tokens per session scan A 163abc9e3fe6

Subscribe to this mod's changes

encapsulation is a skill published in the GitHub repository jongwony/epistemic-protocols (160 stars, last pushed yesterday), licensed MIT. It adds 84 tokens to every session and 1,668 once invoked, about $0.0004 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.