Auto-Skill Plugin - Pattern Detection & Generation

VerifiedCaution

Automatically detects repeated tool sequences (3+ occurrences) from coding agent sessions and generates reusable skills (SKILL.md). Allows loading these skills mid-session without restart, with proactive discovery based on the current task.

Sby Skills Guide Bot
DevelopmentIntermediate
1406/2/2026
Claude Code
#auto-skill#pattern-detection#skill-generation#dynamic-loading#workflow-automation

Recommended for

Our review

This plugin automatically detects recurring workflow patterns from coding agent sessions, generates reusable skills, and can load them dynamically mid-session.

Strengths

  • Automates skill creation from observed patterns
  • Loads skills without requiring session restart
  • Proactively discovers relevant skills for current tasks
  • Confidence scoring system to filter high-quality patterns

Limitations

  • Requires npm package installation for CLI commands
  • Pattern detection limited to tool sequences of 2–10 steps
  • Patterns must occur at least 3 times within the last 7 days
When to use it

Use this plugin when you frequently perform repetitive tasks with your coding agent and want to automate turning them into reusable skills.

When not to use it

Avoid using it for one-off or infrequent workflows, or if you prefer to manage your skills manually.

Security analysis

Caution
Quality score90/100

The skill documents a tool that auto-generates and loads skills. It includes a bash installation command, which poses a risk if the target script is compromised. No direct destructive or exfiltrating actions are described, but the tool's dynamic loading feature could be a vector for malicious skills.

Findings
  • Instructs running a bash script for installation, which could execute arbitrary code if the script is untrusted.
  • Dynamic skill loading could introduce untrusted instructions if not properly reviewed.

Examples

Review detected patterns
Show me the patterns that have been detected so I can approve or reject them.
Load a skill mid-session
Load the skill named 'code-review' into the current session.
Check system status
What is the current status of the auto-skill plugin? Show me stats and config.

name: auto-skill-guide description: Documentation for the Auto-Skill plugin - automatic workflow pattern detection, skill generation, and dynamic loading

Auto-Skill Plugin

This plugin automatically detects workflow patterns from your coding agent sessions, generates reusable skills, and can load them dynamically mid-session.

CLI Tool Installation

The agent skills are now installed, but to use CLI commands like auto-skill init, auto-skill discover, etc., you need to install the npm package.

Quick Install:

# Option 1: Run the included install script
bash ~/.agents/skills/auto-skill-guide/install-cli.sh

# Option 2: Install globally via npm
npm install -g @matrixy/auto-skill

# Option 3: Use without installing (via npx)
npx @matrixy/auto-skill init

Verify: auto-skill version


How It Works

Session 1: Grep → Read → Edit    ─┐
Session 2: Grep → Read → Edit     ├──▶ Pattern Detected → SKILL.md
Session 3: Grep → Read → Edit    ─┘
  1. Observation: Every tool call is recorded via PostToolUse hook
  2. Detection: Patterns are analyzed for repetition (3+ occurrences)
  3. Generation: Approved patterns become SKILL.md files with proper frontmatter
  4. Discovery: Claude proactively offers relevant skills for your tasks
  5. Loading: Skills can be loaded mid-session without restart

Commands

/auto-skill:review

Review and approve detected patterns:

/auto-skill:review              # List all detected patterns
/auto-skill:review preview ID   # Preview a pattern as a skill
/auto-skill:review approve ID   # Generate skill from pattern
/auto-skill:review reject ID    # Dismiss a pattern

/auto-skill:load

Load a generated skill into the current session:

/auto-skill:load                # List available skills
/auto-skill:load <name>         # Load specific skill immediately

Skills loaded this way become active immediately without requiring a session restart.

/auto-skill:status

Show system diagnostics:

/auto-skill:status              # Display stats, patterns, and config

Pattern Detection

Patterns are detected when:

  • Same tool sequence appears 3+ times across sessions
  • Sequence is 2-10 tools long
  • Pattern has occurred within the last 7 days

Confidence Scoring

| Factor | Weight | Description | |--------|--------|-------------| | Occurrences | 40% | More occurrences = higher confidence | | Length | 20% | 3-5 tools is ideal | | Success Rate | 25% | Successful patterns score higher | | Recency | 15% | Recent patterns are prioritized |

Example Patterns

Grep → Read → Edit        # Search, read context, make changes
Glob → Read → Write       # Find files, read, create new file
Read → Edit → Bash        # Read file, edit, run tests

Dynamic Skill Loading

Unlike standard Claude Code skills (loaded at session start), auto-generated skills can be loaded mid-session using a registry system.

How It Works

  1. A lightweight registry indexes all skills (~metadata only)
  2. Scripts retrieve and format skill content on demand
  3. Output uses clear delimiters that signal active instructions:
======================================================================
SKILL LOADED: <name>
Confidence: <score>
Allowed tools: <tools>
======================================================================

<skill instructions>

======================================================================
END OF SKILL - INSTRUCTIONS ARE NOW ACTIVE
======================================================================

Proactive Discovery

Claude can automatically discover relevant skills using the skill-discovery skill:

  1. User requests a multi-step task
  2. Claude searches for matching skills
  3. If found, Claude asks: "Would you like me to load this skill?"
  4. User approves → skill is loaded and followed

CLI Commands

auto-skill discover             # Discover skill patterns
auto-skill stats                # Show adoption statistics
auto-skill graduate             # Manage skill graduation
auto-skill agents list          # List known agents
auto-skill agents detect        # Detect installed agents

To search for community skills, use Skills CLI:

npx skills find "query"         # Interactive search
npx skills add owner/repo       # Install skill

Execution Contexts

Generated skills automatically get appropriate execution settings:

| Pattern Type | Context | Agent | Why | |-------------|---------|-------|-----| | Grep → Read | Inline | Explore | Read-only, safe | | Read → Edit → Bash | Fork | general-purpose | Has side effects |

Inline: Runs in current conversation context.

Fork (context: fork): Runs in isolated subagent. Use for:

  • Tasks with side effects (deployments, builds)
  • Workflows that shouldn't pollute conversation history
  • Long-running operations

Tool Restrictions

Generated skills include allowed-tools based on the pattern:

allowed-tools: Grep, Read, Edit

This prevents scope creep and ensures predictable behavior.

Generated Skills

Auto-generated skills are saved to:

~/.claude/skills/auto/<skill-name>/SKILL.md

Each skill includes:

  • YAML frontmatter with metadata
  • auto-generated: true flag
  • context: fork if appropriate
  • allowed-tools restrictions
  • Confidence score and source sessions
  • Procedural steps derived from the pattern

Configuration

Detection thresholds (in ~/.claude/auto-skill.local.md):

---
detection:
  min_occurrences: 3      # Minimum pattern repetitions
  min_sequence_length: 2  # Shortest pattern
  max_sequence_length: 10 # Longest pattern
  lookback_days: 7        # Analysis window
  min_confidence: 0.7     # Suggestion threshold
---

Data Storage

| Data | Location | |------|----------| | Events | ~/.claude/auto-skill/events.db | | Skills | ~/.claude/skills/auto/ | | Tracking | ~/.claude/auto-skill/skills_tracking.db |

Privacy

  • All data is stored locally
  • No data is sent to external services
  • Anonymous telemetry can be disabled via AUTO_SKILL_NO_TELEMETRY=1 or DO_NOT_TRACK=1

Troubleshooting

No patterns detected?

  • Need 3+ occurrences of the same sequence
  • Check the lookback period (default: 7 days)
  • Run /auto-skill:status to see event counts

Skill not loading?

  • Run auto-skill discover to refresh
  • Check the skill exists in ~/.claude/skills/auto/

Hooks not working?

  • Verify plugin is installed correctly
  • Check hooks/hooks.json configuration
  • Ensure Node.js 18+ is available

Want to reset?

  • Delete ~/.claude/auto-skill/events.db
  • Remove skills from ~/.claude/skills/auto/
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