Agent skill

Error Pattern Analyzer

A specialized skill for systematically classifying error patterns and constructing concept deficit maps.

Apache-2.0Auto-check passedEducation

Install Error Pattern Analyzer

skills CLI

$ npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 error-pattern-analyzer --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .claude/skills && cp -r skills-src/en/57-exam-prep/.claude/skills/error-pattern-analyzer .claude/skills/error-pattern-analyzer && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "error-pattern-analyzer" agent skill from https://github.com/revfactory/harness-100/tree/main/en/57-exam-prep/.claude/skills/error-pattern-analyzer into .claude/skills/error-pattern-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "error-pattern-analyzer", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/revfactory/harness-100/tree/main/en/57-exam-prep/.claude/skills/error-pattern-analyzer

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 error-pattern-analyzer --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .agents/skills && cp -r skills-src/en/57-exam-prep/.claude/skills/error-pattern-analyzer .agents/skills/error-pattern-analyzer && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "error-pattern-analyzer" agent skill from https://github.com/revfactory/harness-100/tree/main/en/57-exam-prep/.claude/skills/error-pattern-analyzer into .agents/skills/error-pattern-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "error-pattern-analyzer", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 error-pattern-analyzer --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/en/57-exam-prep/.claude/skills/error-pattern-analyzer .cursor/skills/error-pattern-analyzer && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "error-pattern-analyzer" agent skill from https://github.com/revfactory/harness-100/tree/main/en/57-exam-prep/.claude/skills/error-pattern-analyzer into .cursor/skills/error-pattern-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "error-pattern-analyzer", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/revfactory/harness-100.git --path en/57-exam-prep/.claude/skills/error-pattern-analyzer

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 error-pattern-analyzer --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/en/57-exam-prep/.claude/skills/error-pattern-analyzer .gemini/skills/error-pattern-analyzer && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "error-pattern-analyzer" agent skill from https://github.com/revfactory/harness-100/tree/main/en/57-exam-prep/.claude/skills/error-pattern-analyzer into .gemini/skills/error-pattern-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "error-pattern-analyzer", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install revfactory/harness-100 error-pattern-analyzer

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .github/skills && cp -r skills-src/en/57-exam-prep/.claude/skills/error-pattern-analyzer .github/skills/error-pattern-analyzer && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "error-pattern-analyzer" agent skill from https://github.com/revfactory/harness-100/tree/main/en/57-exam-prep/.claude/skills/error-pattern-analyzer into .github/skills/error-pattern-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "error-pattern-analyzer", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install revfactory/harness-100 error-pattern-analyzer --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/revfactory/harness-100.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/en/57-exam-prep/.claude/skills/error-pattern-analyzer .opencode/skills/error-pattern-analyzer && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "error-pattern-analyzer" agent skill from https://github.com/revfactory/harness-100/tree/main/en/57-exam-prep/.claude/skills/error-pattern-analyzer into .opencode/skills/error-pattern-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "error-pattern-analyzer", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: error-pattern-analyzer
GitHub stars: 1.3k
Token cost: ~1.1k tokens
SKILL.md length: 278 words
Files: 1
Skills in repo: 464
Repo updated: Mar 22, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

A specialized skill for systematically classifying error patterns and constructing concept deficit maps.

Tasks that involve Root cause analysis
SKILL.md covers Target Agents, 5-Type Error Classification…, Error Analysis Report Template and Concept Deficit Tracking Matrix, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Error Pattern Analyzer is an agent skill from revfactory/harness-100. A specialized skill for systematically classifying error patterns and constructing concept deficit maps. Used by error-analyst and diagnostician agents when analyzing learner error data to diagnose root causes and develop customized remediation strategies. Automatically applied in contexts such as 'error patterns', 'wrong answer analysis', 'concept deficits', 'weakness analysis', 'error types'. However, psychological testing and learning disability diagnosis are outside the scope of this skill.

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Education, covering Root cause analysis. The licence is Apache-2.0.

When your agent uses it

Tasks that involve Root cause analysis

Example prompts

“error patterns”
“wrong answer analysis”
“concept deficits”
“/error-pattern-analyzer”

What it can do on your machine

Read from SKILL.md and the folder at commit 8e8d35c. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Error Pattern Analyzer loads about 1.1k tokens when it runs. Until then it costs about 131 tokens; SKILL.md has 278 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~131
When it runs · the whole SKILL.md, loaded when a task matches: ~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from revfactory/harness-100 at commit 8e8d35c, republished under its Apache-2.0 licence (© revfactory). 278 words, ~1,148 tokens.

Download SKILL.mdSave it as .claude/skills/error-pattern-analyzer/SKILL.md (or your agent's skills folder).

name: error-pattern-analyzer
description: A specialized skill for systematically classifying error patterns and constructing concept deficit maps. Used by error-analyst and diagnostician agents when analyzing learner error data to diagnose root causes and develop customized remediation strategies. Automatically applied in contexts such as 'error patterns', 'wrong answer analysis', 'concept deficits', 'weakness analysis', 'error types'. However, psychological testing and learning disability diagnosis are outside the scope of this skill.

Error Pattern Analyzer — Error Pattern Analysis Tool

A specialized skill that enhances the error-analyst and diagnostician agents' error analysis capabilities.

Target Agents

error-analyst — Error pattern classification, remediation strategy formulation
diagnostician — Weakness identification, concept deficit diagnosis

5-Type Error Classification System

Type 1: Conceptual Gap

Definition: The core concept is not understood or is misunderstood Signal: Repeated errors on questions related to the same concept Prescription: Concept re-learning -> varied examples -> self-explanation

Example: All normalization questions answered incorrectly
-> Functional dependency concept itself is inaccurate
-> Prescription: Re-learn functional dependency + step-by-step normalization practice

Type 2: Procedural Error

Definition: The concept is understood but mistakes occur during application Signal: Errors occur at a specific step in the solution process Prescription: Step-by-step checklist + repeated practice

Example: Understands SQL JOIN concept but gets wrong results with multiple JOINs
-> JOIN order and condition application procedure error
-> Prescription: Step-by-step JOIN worksheet + progressively increasing complexity

Type 3: Careless Mistake

Definition: Understands the material but makes errors due to inattention Signal: Same question type is sometimes right, sometimes wrong; increases under time pressure Prescription: Verification habits + time management training

Type 4: Trap Error

Definition: Falls for intentional error-inducing devices set by the question writer Signal: Repeatedly selects attractive distractors Prescription: Trap pattern learning + "Why is this NOT the answer?" training

Type 5: Knowledge Gap

Definition: The area has not been studied at all Signal: Guessing-level accuracy (25%) on a specific topic Prescription: New study of the area is required

Error Analysis Report Template

markdown

### Error Analysis Results

#### 1. Error Type Distribution

| Error Type | Count | Ratio | Severity |
|-----------|-------|-------|---------|
| Conceptual gap | 8 | 32% | High |
| Procedural error | 5 | 20% | Medium |
| Careless mistake | 4 | 16% | Low |
| Trap error | 5 | 20% | Medium |
| Knowledge gap | 3 | 12% | High |

#### 2. Concept Deficit Map

[Concept A] <- Prerequisite concept
    |
[Concept B] <- Deficit discovered here
    |
[Concept C] <- Cannot learn (requires B first)

#### 3. Remediation Priority Order

1st: Re-learn Concept B (affects downstream Concept C)
2nd: New study of knowledge gap areas
3rd: Trap pattern recognition training

Concept Deficit Tracking Matrix

Prerequisite Dependency Graph

Track inter-concept dependencies to find the root deficit:

If the learner got "tree traversal" wrong:
  -> Check understanding of "recursion"
    -> Check understanding of "stack"
      -> Check understanding of "function call structure"

The lowest-level deficit = root cause

Remediation Priority Calculation

Priority = Deficit Severity x Impact Scope x Exam Frequency

Deficit severity: Complete deficit (3), Partial deficit (2), Unstable (1)
Impact scope: Number of downstream concepts (more = higher)
Exam frequency: Exam weight over last 3 years

Error Pattern Characteristics by Exam Type

Exam Type	Primary Error Patterns	Key Countermeasures
Certification (written)	Similar concept confusion, memorization gaps	Comparison tables, flashcards
Certification (practical)	Procedural errors, time overrun	Hands-on practice, timed drills
Standardized tests	Trap errors, time allocation	Trap pattern training, time strategy
Civil service	Detail confusion, statute memorization	Keyword mnemonics, past exam repetition
TOEIC	Listening concentration, vocabulary confusion	Shadowing, similar vocabulary organization

Files

Just SKILL.md in en/57-exam-prep/.claude/skills/error-pattern-analyzer of revfactory/harness-100.

Open the folder on GitHubat commit 8e8d35c

Compare with similar skills

Error Pattern Analyzer next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Error Pattern Analyzer compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Error Pattern Analyzer this skillrevfactory/harness-100	1.3k	—	~1.1k	Automated safety check: Pass	Apache-2.0	6 mo ago
Mistake Analyzermingchen666/Reviva	236	—	~2.7k	Automated safety check: Pass	None	16 days ago
Pfmea Processhashgraph-online/awesome-codex-plugins	1.2k	—	~2.9k	Automated safety check: Pass	MIT	today
Agent Evaluationseb1n/awesome-ai-agent-skills	206	—	~1.4k	Automated safety check: Pass	MIT	1 mo ago
Kdrive Sentry RcaInfomaniak/desktop-kDrive	120	—	~4.1k	Automated safety check: Pass	GPL-3.0	yesterday
Incident Alert Ticketslangfuse/langfuse	35k	—	~1.6k	Automated safety check: Pass	Custom licence	today

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Questions about Error Pattern Analyzer

What does Error Pattern Analyzer do?

A specialized skill for systematically classifying error patterns and constructing concept deficit maps. Error Pattern Analyzer is an agent skill from revfactory/harness-100. A specialized skill for systematically classifying error patterns and constructing concept deficit maps.

When should I use Error Pattern Analyzer?

Error Pattern Analyzer fits situations like: tasks that involve Root cause analysis.

How do I install Error Pattern Analyzer in Claude Code?

Run `npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a claude-code`. Or copy the skill folder (en/57-exam-prep/.claude/skills/error-pattern-analyzer in revfactory/harness-100) into .claude/skills/error-pattern-analyzer in your project. Claude Code loads it when a task matches its description.

How do I install Error Pattern Analyzer in Codex?

Run `npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a codex`. Or copy the skill folder (en/57-exam-prep/.claude/skills/error-pattern-analyzer in revfactory/harness-100) into .agents/skills/error-pattern-analyzer in your project. Codex loads it when a task matches its description.

Can I use Error Pattern Analyzer in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add revfactory/harness-100 --skill error-pattern-analyzer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/error-pattern-analyzer, .gemini/skills/error-pattern-analyzer, .github/skills/error-pattern-analyzer and .opencode/skills/error-pattern-analyzer in your project.

What does Error Pattern Analyzer need to run?

SKILL.md names no scripts, command-line tools or credentials: Error Pattern Analyzer is instructions for the agent only.

Does Error Pattern Analyzer access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Error Pattern Analyzer safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Error Pattern Analyzer use?

Error Pattern Analyzer is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Error Pattern Analyzer use?

About 1.1k tokens (SKILL.md is roughly 4.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Error Pattern Analyzer?

Skills that share tags, products or a category with Error Pattern Analyzer: Mistake Analyzer (mingchen666/Reviva, 236 stars), Pfmea Process (hashgraph-online/awesome-codex-plugins, 1.2k stars), Agent Evaluation (seb1n/awesome-ai-agent-skills, 206 stars) and Kdrive Sentry Rca (Infomaniak/desktop-kDrive, 120 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Error Pattern Analyzer?

revfactory (a GitHub user) maintains it in revfactory/harness-100, which has 1,290 GitHub stars. The repository holds 464 skills in this directory. The repository was last updated on March 22, 2026.

Source: revfactory/harness-100 on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Error Pattern Analyzer

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Error Pattern Analyzer — Error Pattern Analysis Tool

Target Agents

5-Type Error Classification System

Type 1: Conceptual Gap

Type 2: Procedural Error

Type 3: Careless Mistake

Type 4: Trap Error

Type 5: Knowledge Gap

Error Analysis Report Template

Concept Deficit Tracking Matrix

Prerequisite Dependency Graph

Remediation Priority Calculation

Error Pattern Characteristics by Exam Type

Files

Compare with similar skills

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Questions about Error Pattern Analyzer