Whetstone

A Claude Code plugin that makes AI coding agents follow engineering discipline. Plan before coding. Verify before claiming done. Find root cause before patching. Review before merge. Skills activate based on file type and task signals, not manual toggling.

Bundles agents, skills, workflow commands, and a skill distillery for PHP, Python, TypeScript, React, and infrastructure workflows.

Who this is for

Teams using Claude Code for real work. You build with PHP, Python, TypeScript, or React and want the agent to plan before building, verify before shipping, and debug from evidence.

Solo developers who want consistency. Bash tasks receive guidance on strict mode and ShellCheck; Laravel tasks receive strict-type and thin-controller patterns. Skills guide the agent; only checks actually run can establish compliance.

Anyone building with AI agents. Includes skills for multi-agent orchestration, agent-native architecture design, and a distillery that generates new skills from top-rated community sources.

The problem

AI coding agents skip planning, claim "done" without verifying, patch symptoms over root causes, and forget what they learned when context resets. The output looks polished even when the process behind it is missing.

The long-form argument is at AI Agents Don't Lack Capability. They Lack Process.. This plugin supplies that process as instructions and supporting tools.

🚀 Install

Claude Code (recommended)

/plugin marketplace add https://github.com/iliaal/whetstone
/plugin install whetstone@iliaal-marketplace
/reload-plugins

Standalone skills (any AI coding agent)

Individual skills work with Claude Code, Cursor, Codex, Gemini CLI, Copilot CLI, OpenCode, and 35+ other agents via the ai-skills repo:

# All skills
npx skills add iliaal/ai-skills

# Single skill
npx skills add iliaal/ai-skills -s code-review

# Target a specific agent
npx skills add iliaal/ai-skills -a cursor

Codex

Install Whetstone's portable skills and Context7 integration through the repository's native Codex marketplace:

git clone https://github.com/iliaal/whetstone
cd whetstone
bash scripts/install-codex-plugin.sh

Start a new Codex thread after installation or update. The native package includes Whetstone's cross-harness skills and Context7 MCP server. Claude-specific agents, slash commands, and hooks remain available only through the Claude Code plugin.

No shipped skill carries Claude's disable-model-invocation flag or its Codex twin, allow_implicit_invocation: false in agents/openai.yaml. Commands reach skills through explicit Skill() tool calls, which the harness treats as model invocation, so either flag makes that call fail. Trigger control lives in each skill's description. scripts/test-codex-plugin.sh asserts the set of flagged skills stays empty.

Normal Whetstone releases refresh the local Codex plugin before publication when codex is on PATH. For source edits between releases, use the wrapper that applies a temporary cachebuster, reinstalls, and restores the tracked release version:

bash scripts/refresh-codex-plugin.sh

The legacy converter remains available for OpenCode and other non-plugin targets.