feat: add finance-skill-creator plugin (#52)

Author: himself65

.claude-plugin/marketplace.json

@@ -37,6 +37,12 @@
       "source": "./plugins/ui-tools",
       "description": "Generative UI design system for rendering interactive HTML/SVG widgets in Claude conversations.",
       "version": "5.1.1"
+    },
+    {
+      "name": "finance-skill-creator",
+      "source": "./plugins/skill-creator",
+      "description": "Create, evaluate, and iterate on high-quality agent skills with structured guidance, quality scoring, and best-practice enforcement.",
+      "version": "5.1.1"
     }
   ]
 }

CLAUDE.md

@@ -12,7 +12,7 @@ This repo is both a Claude Code plugin marketplace and an Agent Skills repositor
 
 ```
 .claude-plugin/
-  marketplace.json        # Marketplace definition — lists all 5 plugins
+  marketplace.json        # Marketplace definition — lists all 6 plugins
 plugins/
   market-analysis/        # Stock analysis, earnings, correlations, options via yfinance
     plugin.json           # Plugin manifest for this group
@@ -33,6 +33,9 @@ plugins/
   ui-tools/               # Generative UI design system
     plugin.json
     skills/...
+  skill-creator/          # Skill authoring, evaluation, and improvement
+    plugin.json
+    skills/...
 workspaces/               # Development workspaces (not distributed)
 .agents/                  # Auto-generated mirror for agent distribution (do not edit directly)
 .github/workflows/
@@ -114,7 +117,7 @@ Guidelines:
 
 ## Plugin system
 
-This repo ships as a Claude Code plugin marketplace containing 5 plugins:
+This repo ships as a Claude Code plugin marketplace containing 6 plugins:
 
 | Plugin | Description |
 |---|---|
@@ -123,8 +126,9 @@ This repo ships as a Claude Code plugin marketplace containing 5 plugins:
 | `finance-data-providers` | External API data (Adanos, Funda AI, Hormuz Strait) |
 | `finance-startup-tools` | Startup analysis frameworks |
 | `finance-ui-tools` | Generative UI design system for Claude widgets |
+| `finance-skill-creator` | Skill authoring, evaluation, and improvement |
 
-- `.claude-plugin/marketplace.json` — marketplace listing with all 4 plugin entries.
+- `.claude-plugin/marketplace.json` — marketplace listing with all 6 plugin entries.
 - `plugins/<group>/plugin.json` — per-plugin manifest (name, version, keywords). Skills under `plugins/<group>/skills/` with SKILL.md frontmatter are auto-discovered by the plugin loader.
 - `.agents/` — auto-generated mirror for agent distribution. **Do not edit directly** — this is produced from `plugins/` content.
 

README.md

@@ -23,6 +23,7 @@ npx plugins add himself65/finance-skills --plugin finance-social-readers
 npx plugins add himself65/finance-skills --plugin finance-data-providers
 npx plugins add himself65/finance-skills --plugin finance-startup-tools
 npx plugins add himself65/finance-skills --plugin finance-ui-tools
+npx plugins add himself65/finance-skills --plugin finance-skill-creator
 ```
 
 ### Claude Code — Individual Skills
@@ -94,6 +95,14 @@ Generative UI design system for rendering interactive HTML/SVG widgets in Claude
 |---|---|
 | [generative-ui](plugins/ui-tools/skills/generative-ui/) | Generative UI design system for Claude's `show_widget` |
 
+### Skill Creator (`finance-skill-creator`)
+
+Create, evaluate, and iterate on high-quality agent skills with structured guidance, quality scoring, and best-practice enforcement.
+
+| Skill | Description |
+|---|---|
+| [skill-creator](plugins/skill-creator/skills/skill-creator/) | Create new skills, evaluate existing ones against a 10-dimension rubric, and improve skill quality |
+
 ## License
 
 MIT

plugins/skill-creator/plugin.json

@@ -0,0 +1,19 @@
+{
+  "name": "finance-skill-creator",
+  "description": "Create, evaluate, and iterate on high-quality agent skills with structured guidance, quality scoring, and best-practice enforcement.",
+  "version": "5.1.1",
+  "author": {
+    "name": "himself65"
+  },
+  "homepage": "https://github.com/himself65/finance-skills",
+  "repository": "https://github.com/himself65/finance-skills",
+  "license": "MIT",
+  "keywords": [
+    "finance",
+    "skills",
+    "skill-creator",
+    "agent",
+    "authoring",
+    "meta"
+  ]
+}

plugins/skill-creator/skills/skill-creator/README.md

@@ -0,0 +1,46 @@
+# skill-creator
+
+Create, evaluate, and iterate on high-quality agent skills with structured guidance, quality scoring, and best-practice enforcement.
+
+## What it does
+
+- **Create** new skills from scratch with step-by-step guidance through architecture planning, SKILL.md writing, reference file creation, and quality validation
+- **Evaluate** existing skills against a 10-dimension quality rubric (trigger quality, defaults, step architecture, reference strategy, output template, etc.) with benchmark comparisons
+- **Improve** skills by scoring them, proposing ranked improvements, and applying targeted patches
+
+The skill encodes patterns extracted from analyzing 20+ production finance skills and 120+ hermes-agent skills, distilling what separates top-tier skills (sepa-strategy, options-payoff) from mediocre ones.
+
+**Core rule:** Skills must always detect available tools at runtime and adapt with decision trees and fallback paths — never hardcode a single method.
+
+## Triggers
+
+- "create a skill", "make a new skill", "build a skill for", "write a skill that"
+- "improve this skill", "optimize this skill", "this skill isn't working well"
+- "evaluate this skill", "score this skill", "how good is this skill"
+- "run evals on", "benchmark this skill", "test this skill's quality"
+- "turn this into a skill", "I keep doing X manually", "can you remember how to do X"
+
+## Platform
+
+Works on **Claude Code** and other CLI-based agents. Also works on **Claude.ai** for evaluation and planning (skill file creation requires CLI).
+
+## Setup
+
+```bash
+# As a plugin (recommended)
+npx plugins add himself65/finance-skills --plugin finance-skill-creator
+
+# Or install just this skill
+npx skills add himself65/finance-skills --skill skill-creator
+```
+
+See the [main README](../../../../README.md) for more installation options.
+
+## Reference files
+
+- `references/dynamic-calling.md` -- **Core**: Detection flows, decision trees, method fallbacks, runtime awareness, 9 patterns from production skills
+- `references/architecture-patterns.md` -- Linear, Router, Methodology, Widget, and API Wrapper patterns with examples and anti-patterns
+- `references/frontmatter-guide.md` -- Complete YAML frontmatter field reference (name, description, platform, env vars, config, credentials)
+- `references/quality-rubric.md` -- 10-dimension scoring rubric with 1-10 scales, benchmark scores, and score interpretation
+- `references/skill-examples.md` -- Annotated excerpts from top skills showing why specific patterns work
+- `references/writing-guide.md` -- How to write each SKILL.md section, detection flows, defaults tables, and output templates