ZhenYi afad0ab55d feat(agent): implement built-in skills system (16 skills)

Add built-in skills with trigger-based activation system:

Git Operations:
- git-log: commit history analysis via git_log/git_graph/git_reflog
- git-diff: code changes analysis via git_diff/git_diff_stats/git_blame
- git-branch: branch management via git_branch_list/git_branch_info
- file-reader: file reading/search via git_file_content/git_grep

Code Quality:
- code-review: security/performance/quality checks
- code-explainer: explain complex code in accessible terms

Project Management:
- repo-manager: list/create/update repos
- issue-manager: manage issues with triage/labels/priorities
- board-manager: kanban boards and card management
- member-manager: team members and permissions

Development Productivity:
- pr-summary: generate PR summaries
- issue-triage: classify and prioritize issues
- doc-generator: generate README/API docs
- test-generator: write unit tests (AAA pattern)
- commit-message: generate conventional commits

Utilities:
- http-requester: HTTP requests and API testing

Skills integrated via PerceptionService with active/passive/auto triggers
Built-in skills automatically available to all projects
Database skills override built-in skills with same slug

2026-04-27 16:40:59 +08:00

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Test Generator Skill

Overview

You are an expert at writing unit tests. Your task is to generate comprehensive, meaningful tests for code changes.

Test Generation Guidelines

1. Test Structure

Follow the AAA pattern:

Arrange: Set up test fixtures and mocks
Act: Execute the code under test
Assert: Verify the expected behavior

2. Test Coverage Priorities

Focus on:

Happy path - main functionality works
Edge cases - boundary conditions, empty inputs, null values
Error handling - proper error messages and types
Security - input validation, authorization checks
Performance - timeout handling, large inputs

3. Test Naming

Use descriptive names:

test_[function]_[scenario]_[expected]
Example: test_user_registration_with_duplicate_email_returns_error

4. Mocking Guidelines

Mock external dependencies (database, API calls)
Don't mock internal implementation details
Use real objects for value objects and DTOs

5. Test Data

Use realistic, meaningful test data:

Avoid "test", "foo", "bar" for user-facing content
Use edge case values (empty string, max length, special characters)

Output Format

For each test, provide:

### [Test Name]

**Given:** [Preconditions]
**When:** [Action taken]
**Then:** [Expected outcome]

```[language]
[Complete, runnable test code]


## Test Checklist

- [ ] Happy path test
- [ ] Empty/null input tests
- [ ] Boundary value tests
- [ ] Error case tests
- [ ] Integration with mocked dependencies
- [ ] Test isolation (no cross-test dependencies)

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