feat: add commit and skill-creator plugins

commit plugin generates conventional commit messages from staged diffs.
skill-creator is a minimal port of anthropic's skill-creator with
SKILL.md guide and schemas reference (no bundled scripts/agents).

Author: kossakovsky

.claude-plugin/marketplace.json

@@ -10,15 +10,15 @@
   "plugins": [
     {
       "name": "switch-provider",
-      "description": "Switch Claude Code between AI providers (Anthropic, zAI, DeepSeek, Kimi, Qwen, MiniMax) with a single command",
+      "description": "Switch Claude Code between AI providers (Anthropic, Z.AI, Kimi, MiniMax) with a single command",
       "version": "1.0.0",
       "author": {
         "name": "kossakovsky"
       },
       "source": "./plugins/switch-provider",
       "category": "utilities",
       "tags": ["provider", "api", "configuration"],
-      "keywords": ["provider", "switch", "api", "xai", "deepseek", "kimi", "qwen", "minimax"]
+      "keywords": ["provider", "switch", "api", "zai", "kimi", "minimax"]
     },
     {
       "name": "plugin-development",
@@ -31,6 +31,30 @@
       "category": "developer-tools",
       "tags": ["development", "plugins", "scaffold", "validation", "tools"],
       "keywords": ["claude-code", "plugins", "developer-tools", "scaffold", "validation"]
+    },
+    {
+      "name": "commit",
+      "description": "Smart git commits with conventional commit message generation",
+      "version": "1.0.0",
+      "author": {
+        "name": "kossakovsky"
+      },
+      "source": "./plugins/commit",
+      "category": "developer-tools",
+      "tags": ["git", "commits", "conventional-commits"],
+      "keywords": ["git", "commit", "conventional", "changelog"]
+    },
+    {
+      "name": "skill-creator",
+      "description": "Create new skills, modify and improve existing skills, and measure skill performance with evals and benchmarks",
+      "version": "1.0.0",
+      "author": {
+        "name": "anthropics"
+      },
+      "source": "./plugins/skill-creator",
+      "category": "developer-tools",
+      "tags": ["skills", "creator", "evals", "development"],
+      "keywords": ["skills", "creator", "evals", "development"]
     }
   ]
 }

README.md

@@ -18,8 +18,10 @@ Then install any plugin:
 
 | Plugin | Description |
 |--------|-------------|
-| [switch-provider](plugins/switch-provider/) | Switch Claude Code between AI providers (Anthropic, zAI, DeepSeek, Kimi, Qwen, MiniMax) with a single command |
+| [switch-provider](plugins/switch-provider/) | Switch Claude Code between AI providers (Anthropic, Z.AI, Kimi, MiniMax) with a single command |
 | [plugin-development](plugins/plugin-development/) | Toolkit for creating, validating, and distributing Claude Code plugins |
+| [commit](plugins/commit/) | Smart git commits with conventional commit message generation |
+| [skill-creator](plugins/skill-creator/) | Create, test, and improve Claude Code skills with evals and benchmarks |
 
 ## Contributing
 

plugins/commit/.claude-plugin/plugin.json

@@ -0,0 +1,8 @@
+{
+  "name": "commit",
+  "version": "1.0.0",
+  "description": "Smart git commits with conventional commit message generation",
+  "author": { "name": "kossakovsky" },
+  "license": "MIT",
+  "keywords": ["git", "commit", "conventional-commits"]
+}

plugins/commit/README.md

@@ -0,0 +1,42 @@
+# commit
+
+Smart git commits with conventional commit message generation.
+
+## Installation
+
+```bash
+/plugin marketplace add kossakovsky/claude-code-plugins
+/plugin install commit@claude-code-plugins
+```
+
+## Usage
+
+Generate a commit message automatically:
+
+```bash
+/commit:commit
+```
+
+Use a custom commit message:
+
+```bash
+/commit:commit "feat: add new feature"
+```
+
+## How It Works
+
+1. Analyzes staged changes with `git diff --staged`
+2. Detects the project's commit style from recent history
+3. Determines the change type (feat, fix, refactor, etc.)
+4. Generates a conventional commit message
+5. Asks for approval before committing
+
+## Conventional Commits Format
+
+Messages follow the format: `type(scope): description`
+
+Types: `feat`, `fix`, `refactor`, `docs`, `chore`, `test`, `style`, `perf`, `ci`, `build`
+
+## License
+
+MIT

plugins/commit/commands/commit.md

@@ -0,0 +1,55 @@
+---
+description: "Create a git commit with a generated conventional commit message"
+argument-hint: "[message]"
+---
+
+# Smart Git Commit
+
+Create a git commit with a conventional commit message, either provided or auto-generated.
+
+## Steps
+
+1. **Check for provided message**: If an argument was provided, use it as the commit message directly and skip to step 6.
+
+2. **Check working tree state**: Run `git status` to see the current state of the repository.
+
+3. **Handle staging**:
+   - If nothing is staged, show the unstaged changes and ask the user what to stage.
+   - Suggest `git add -A` to stage everything, or let the user specify individual files.
+   - Never stage files without explicitly showing what will be staged and getting confirmation.
+
+4. **Analyze staged changes**: Run `git diff --staged` to understand what has been changed.
+
+5. **Detect project commit style**: Run `git log --oneline -10` to see recent commit messages and adapt to the project's conventions.
+
+6. **Determine change type**: Analyze the diff to classify the change as one of:
+   - `feat` — new feature
+   - `fix` — bug fix
+   - `refactor` — code restructuring without behavior change
+   - `docs` — documentation only
+   - `chore` — maintenance, dependencies, config
+   - `test` — adding or updating tests
+   - `style` — formatting, whitespace, linting
+   - `perf` — performance improvement
+   - `ci` — CI/CD configuration
+   - `build` — build system or external dependencies
+
+7. **Generate commit message**: Create a message following the conventional commit format:
+   ```
+   type(scope): description
+   ```
+   - **type**: determined from the diff analysis above
+   - **scope**: optional, inferred from the changed files or directories
+   - **description**: concise summary of changes in imperative mood (e.g., "add user auth endpoint", not "added user auth endpoint")
+
+8. **Present for approval**: Show the generated commit message and ask the user to approve, edit, or reject it.
+
+9. **Execute commit**: If approved, run `git commit -m "<message>"`.
+
+10. **Show result**: Display the commit output to confirm success.
+
+## Important Rules
+
+- Never force-push or amend commits without an explicit request from the user.
+- Never stage files without showing what will be staged first.
+- If there are no changes at all (nothing staged, nothing modified, no untracked files), inform the user and stop.

plugins/skill-creator/.claude-plugin/plugin.json

@@ -0,0 +1,8 @@
+{
+  "name": "skill-creator",
+  "version": "1.0.0",
+  "description": "Create new skills, modify and improve existing skills, and measure skill performance with evals and benchmarks",
+  "author": { "name": "anthropics" },
+  "license": "MIT",
+  "keywords": ["skills", "creator", "evals", "development"]
+}

plugins/skill-creator/README.md

@@ -0,0 +1,29 @@
+# skill-creator
+
+Create, modify, and improve Claude Code skills. Originally from [anthropics/skills](https://github.com/anthropics/skills).
+
+## Installation
+
+```bash
+/plugin marketplace add kossakovsky/claude-code-plugins
+/plugin install skill-creator@claude-code-plugins
+```
+
+## What It Does
+
+The skill-creator activates automatically when you want to create or improve a Claude Code skill. It guides you through:
+
+1. **Capturing intent** -- understanding what the skill should do and when it should trigger
+2. **Writing the SKILL.md** -- structured guidance on frontmatter, progressive disclosure, and writing patterns
+3. **Testing** -- running eval test cases with and without the skill
+4. **Iterating** -- improving based on feedback until the skill works well
+5. **Description optimization** -- tuning triggering accuracy
+
+## Included
+
+- `SKILL.md` -- comprehensive skill creation guide (~480 lines)
+- `references/schemas.md` -- JSON schemas for evals, grading, benchmarks, and other data structures
+
+## License
+
+MIT