agentmods.dev

skill-engine-context

A context navigator for the skill-engine plugin, which creates and maintains skills that load reference material when it is relevant. It explains the plugin’s workflows and how its reference files are organized.

In plain words
What is it for?
Use it to understand or guide bootstrap, discovery, refresh, review, apply, self-audit, and status workflows in skill-engine.
Why use it?
It helps answer skill-engine questions from the appropriate stored references instead of relying on guesswork.

Skill for Claude CodeCodex

2 25d ago A scan 95 tokens original MIT
View the source file nick-railsback/skill-engine
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/nick-railsback/skill-engine/skill-engine-context
Any agent
npx skills add nick-railsback/skill-engine --skill skill-engine-context
Clone the repo
git clone --depth 1 https://github.com/nick-railsback/skill-engine

Made for: Claude Code, Codex.

Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,402 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 $0.00095 $0.02402
Opus 5 $0.00048 $0.01201
Sonnet 5 $0.00019 $0.00480
Haiku 4.5 $0.00010 $0.00240

Measured 2d ago against content hash 68eebb0b7773, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

skill-engine-context 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.

The scan reads SKILL.md. This mod also ships 3 executable files (evals/render-eval-results.sh, evals/run-eval.sh, verify.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/skill-engine-context/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Context navigator

Overview

This navigator catalogs references for the source(s) registered with the engine. The navigator itself stays small; references load only when relevant to the current question.

When asked a question this navigator's domain covers:

  1. Scan the Catalog below for the matching topic.
  2. Follow the link to read the reference file.
  3. If the question spans multiple references, consult the Cross-reference map.
  4. If a reference points at a source URL for deeper detail, follow it only if the reference itself didn't answer the question.

Claims policy

Cite by default, and make load-bearing claims verifiable:

  1. Inline-cite every load-bearing claim with its SHA-pinned permalink — the https://github.com/<owner>/<repo>/blob/<sha>/<path>#L<start>-L<end> link the reference gives for that fact (versions, defaults, signatures, deprecations, behavior a user could get wrong by guessing). Put the permalink inline, on the claim. Use a bare filename parenthetical (e.g. (reference-name.md)) only when the reference genuinely provides no permalink. This inline permalink is what the grounded-citation eval (SELF-AUDIT Check 8) grades.
  2. Don't cite orientational prose — "what is X?", "when did X launch?" — answer those from this navigator alone; opening a reference is itself a citation gesture.
  3. End with a one-line provenance footer, emitted italic, formatted *References consulted: foo.md, bar.md. Grounded in {{LIBRARY}}@{{VERSION}} — [reference index]({{INDEX_URL}}).* The footer is a summary of what you read — not a substitute for the inline permalinks on the claims. The {{LIBRARY}} / {{VERSION}} / {{INDEX_URL}} tokens are agent-substituted at answer time, so they appear literally in the stamped SKILL.md.
  4. If no reference was opened, say so in the footer ("Answered from general knowledge — no {{LIBRARY}} references consulted") — never fake it.

The voice is competent and careful — no "as an AI assistant" hedging.

Read the full file on GitHub · 105 lines

Files

What ships with it

22 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 · 105 lines · 95 tokens per session scan A 68eebb0b7773

Subscribe to this mod's changes

skill-engine-context is a skill published in the GitHub repository nick-railsback/skill-engine (2 stars, last pushed 25d ago), licensed MIT. It adds 95 tokens to every session and 2,402 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 2026-08-31.

Building agentsai-engineeringclaude-codeclaude-code-plugindeveloper-toolsdocumentationskills
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