What is skill-enhancer?

A guide for auditing and improving existing agent skills against defined quality rules. TDD means test-driven development: checking expected behavior through tests while building or changing something.

Use it to analyze a skill's gaps, improve its wording and structure, audit its execution and safety rules, and address validator findings.

It identifies missing instructions, weak descriptions, unsafe practices, and validation gaps before a skill is treated as complete.

skill-enhancer — Skill by MatrixFounder

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/matrixfounder/agentic-development/skill-enhancer

Any agent

npx skills add MatrixFounder/Agentic-development --skill skill-enhancer

Clone the repo

git clone --depth 1 https://github.com/MatrixFounder/Agentic-development

Made for: Claude Code, Codex.

Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,292 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 2 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	$0.00025	$0.02292
Opus 5	$0.00013	$0.01146
Sonnet 5	$0.00005	$0.00458
Haiku 4.5	$0.00003	$0.00229

Measured 2d ago against content hash f2417392b5a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

skill-enhancer scanned grade B with 2 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 2 executable files (scripts/analyze_gaps.py, scripts/skill_utils.py), 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.

Downloads and executes remote codemediumSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

- **Security Remediation**: Fix vulnerabilities flagged by `skill-validator` (e.g., `curl | bash`, secrets, weak permissions).

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **Security Remediation**: Fix vulnerabilities flagged by `skill-validator` (e.g., `curl | bash`, secrets, weak permissions).

.agent/skills/skill-enhancer/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skill Enhancer

Purpose: This meta-skill analyzes other skills for compliance with TDD, CSO, and Script-First standards, guiding the agent through upgrades.

1. Red Flags (Anti-Rationalization)

STOP and READ THIS if you are thinking:

"I'll just add the sections blindly" -> WRONG. You must understand why the skill fails before fixing it.
"The description is close enough" -> WRONG. It must start with "Use when".
"Examples are optional" -> WRONG. "Rich Skills" mandate examples.
"It's just a small 20-line example" -> WRONG. Inline blocks > 12 lines are prohibited. Extract them.
"I'll instruct the agent to parse the file line-by-line in text" -> WRONG. Use "Script-First".

2. Capabilities

Audit: Detect gaps (missing Red Flags, inline blocks > 12 lines, poor CSO, weak language) using analyze_gaps.py.
Execution Policy Audit: Detect missing Execution Mode, Script Contract, Safety Boundaries, and Validation Evidence sections.
Security Remediation: Fix vulnerabilities flagged by skill-validator (e.g., curl | bash, secrets, weak permissions).
Plan: Propose specific content improvements using references/refactoring_patterns.md.
Execute: Apply refactoring patterns to upgrade the skill.

2.5. Execution Mode

Mode: hybrid
Rationale: gap triage and refactoring decisions are prompt-driven, while gap detection is script-driven.

2.6. Script Contract

Primary Command: python3 scripts/analyze_gaps.py <target-skill-path> [--json]
Inputs: target skill path + optional output mode.
Outputs: structured gap list and pass/fail status.
Failure Semantics: non-zero exit when gaps exist (for deterministic gate behavior).

2.7. Safety Boundaries

Scope: apply edits only to explicitly selected target skill.
Default Exclusions: do not refactor unrelated skills or global docs by default.
Destructive Actions: full-file overwrite is prohibited unless explicitly requested and reviewed.

Read the full file on GitHub · 150 lines

Files

What ships with it

10 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 · 150 lines · 25 tokens per session scan B f2417392b5a8

Subscribe to this mod's changes

skill-enhancer is a skill published in the GitHub repository MatrixFounder/Agentic-development (5 stars, last pushed 19d ago), licensed Apache-2.0. It adds 25 tokens to every session and 2,292 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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skill-enhancer