iyu

Claude Code Plugins for Library Maintainers

A collection of Claude Code plugins for library maintainers and developers.

Why these plugins — a thin governance layer, not a heavier harness

As mainstream harness / loop-engineering tooling grows heavier — an "OS wrapped around the model" — these plugins make the opposite bet: stay thin and ride Claude Code's native loop, tools, and context management, adding only the judgment a generic harness cannot supply. A custom layer is always slower to evolve than the harness beneath it, so the goal is to fill gaps, never fence off native features.

Three governing principles (the plugin's constitution):

• Minimal Intervention — hook around the native loop, never rewrite it. The thinner the layer, the longer it lives.
• Critical but Constructive (Rule of Law) — a maintainer, not a typist. Human instructions sit below the project's constitution (philosophy, architecture, design docs); a conflict triggers a documented amendment — revise the instruction, or amend the doc — never silent compliance and never unilateral override. Unobserved data stays "unknown" rather than guessed.
• Adaptive Iteration — don't stop at "it compiles". When primary work is done, surplus cycles climb a lifecycle ladder: durable value → stability → efficiency.

How that differs from the mainstream:

	Mainstream harness / loop tooling	iyu
Stance	Wrap the model in an OS	Thin layer on Claude Code native
Human instruction	Ground truth to execute	Below the project constitution; corrected via amendment
Termination	Stops at delivery (compiles / marker hit)	Climbs the lifecycle ladder past delivery
Feedback loop	Ends at merge	Closed — production telemetry (App Insights) flows back to the backlog

Quick Start

# Add the marketplace
/plugin marketplace add iyulab/claude-plugins

# Install the iyu plugin
/plugin install iyu@iyulab-plugins

Available Plugins

Versioning — two independent version numbers exist by design: marketplace.json → metadata.version tracks the marketplace registry (structure of this catalog), while each plugin's plugin.json → version tracks that plugin itself. They advance separately. Per-plugin keywords are sourced from plugin.json and mirrored into the marketplace entry. See CHANGELOG.md for the iyu plugin history.

iyu (v1.16.0)

Productivity toolkit for open-source library maintainers — adaptive iterative development, issue triage, PR review

Component	Type	Activation	Description
mindset	Skill	Auto (background)	"Critical but Constructive" mindset for conversational triage/dev discussions
issue-triage	Skill	Auto (conversational)	Decision matrices and triage advice
/iyu:issue	Skill	Manual	Full issue triage report
/iyu:pr	Skill	Manual	PR review with security focus
/iyu:run	Skill	Manual	Plan-driven development execution
/iyu:run-cycle	Skill	Manual	Adaptive iterative cycles (re-plan → execute → verify → reflect)
/iyu:telemetry-az	Skill	Manual	Azure App Insights telemetry triage — defects, regressions, feature drop

Installation

/plugin install iyu@iyulab-plugins

Skills (Auto-Activated)

The plugin automatically activates when you discuss issue evaluation or PR review. Just ask naturally:

• "Should I accept this feature request?"
• "How should I respond to this issue?"
• "Is this in scope for my project?"
• "Help me triage this pull request"
• "Review this PR for me"
• "Find similar bugs in the codebase"

Commands

Command	Description
/iyu:issue	Systematic issue evaluation with root cause analysis
/iyu:pr	Professional PR review with security awareness
/iyu:run	Plan-driven development execution
/iyu:run-cycle	Adaptive iterative development cycles
/iyu:telemetry-az	Azure App Insights telemetry triage and issue discovery

/iyu:issue

# Triage a GitHub issue
/iyu:issue https://github.com/user/repo/issues/123

# Quick decision only
/iyu:issue https://github.com/user/repo/issues/123 --quick

# Triage and save report
/iyu:issue ./docs/feature-request.md --save

/iyu:pr

# Full PR review
/iyu:pr https://github.com/user/repo/pull/123

# Quick review (critical issues only)
/iyu:pr https://github.com/user/repo/pull/123 --quick