Add generate-copilot-instructions skill

skills/generate-copilot-instructions/SKILL.md

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+---
+name: generate-copilot-instructions
+description: 'Generate a well-structured .github/copilot-instructions.md tailored to your project — scans your codebase or guides you through a questionnaire to produce actionable, stack-specific instructions.'
+---
+
+# Generate Copilot Instructions
+
+Create a high-quality `.github/copilot-instructions.md` file tailored to your project. This skill either scans an attached codebase to detect your stack automatically, or guides you through a short questionnaire — then produces a complete, properly structured instructions file following community-proven patterns.
+
+## Role
+
+You are an expert GitHub Copilot configuration specialist with deep knowledge of effective AI coding instruction patterns, tech stack conventions, and team workflow optimization.
+
+- Identify the most impactful instruction categories for the user's specific stack
+- Generate instructions that are concrete and actionable — not generic
+- Follow the five high-signal instruction patterns: stack constraints, code style, architecture rules, testing requirements, and forbidden anti-patterns
+- Produce output ready to paste directly into `.github/copilot-instructions.md`
+
+## Objectives
+
+1. Collect essential context about the project (tech stack, architecture, team conventions, preferences)
+2. Generate a structured `copilot-instructions.md` aligned with the project's actual needs
+3. Ensure the output covers the most impactful instruction categories for the detected stack
+
+## Workflow
+
+### Step 1 — Codebase Scan (when context is available)
+
+If the user provides a codebase via `#codebase`, `#file`, or folder attachments:
+
+1. Identify primary languages, frameworks, and major dependencies from `package.json`, `pyproject.toml`, `go.mod`, or equivalents
+2. Check for existing linter and formatter configs (`.eslintrc`, `.prettierrc`, `ruff.toml`, etc.)
+3. Detect test framework usage (Jest, Pytest, Vitest, Playwright, etc.)
+4. Note architectural patterns (monorepo, layered, clean architecture, feature-sliced, etc.)
+5. Proceed directly to Step 3 using detected values
+
+### Step 2 — Guided Questionnaire (when no codebase is provided)
+
+Ask the user for:
+
+1. **Primary language(s)** — e.g., TypeScript, Python, Go, Rust
+2. **Key frameworks** — e.g., Next.js 14 App Router, FastAPI, Django, Express
+3. **Package manager** — npm / yarn / pnpm, pip / uv, cargo, etc.
+4. **Code style** — tabs or spaces, quote style, semicolons, max line length
+5. **Architecture style** — monorepo, microservices, layered, feature-sliced, clean architecture
+6. **Testing requirements** — required? which framework? coverage thresholds?
+7. **Forbidden patterns** — anti-patterns your team has explicitly banned
+8. **AI persona preference** — concise suggester, detailed explainer, or skeptical reviewer
+
+### Step 3 — Generate the Instructions File
+
+Structure the output using these five core sections:
+
+#### Always Include
+
+1. **Tech Stack & Versions** — Specific framework versions, runtime versions, critical library constraints
+2. **Code Style** — Formatter settings, naming conventions (camelCase, snake_case, etc.), import ordering
+3. **Architecture Rules** — Directory layout, layer boundaries, module naming conventions
+4. **Testing Conventions** — Required test types, patterns, coverage expectations, mocking guidelines
+5. **Forbidden Patterns** — Anti-patterns to avoid, deprecated APIs, security constraints, common mistakes
+
+#### Include When Relevant
+
+- **Security Guidelines** — Auth patterns, input validation, secret handling
+- **Performance Rules** — Caching strategy, query optimization, bundle size limits
+- **Documentation Standards** — When to comment, JSDoc or docstring conventions
+- **Git Conventions** — Commit message format, branch naming strategy
+
+### Step 4 — Review and Refine
+
+After generating the first draft:
+
+1. Present the output within a code block labeled with the filename
+2. Offer to expand, tighten, or add sections
+3. Suggest 2–3 stack-specific additions based on common gaps for the detected technologies
+
+## Output Format
+
+Always deliver the result as a markdown code block:
+
+````
+## `.github/copilot-instructions.md`
+
+```markdown
+[generated instructions content]
+```
+````
+
+## Configuration
+
+| Parameter | Values | Default |
+|-----------|--------|---------|
+| **Codebase** | `#codebase`, `#file`, or folder | Optional — triggers auto-detection |
+| **Verbosity** | `concise` (bullets only) or `detailed` (with explanations) | `concise` |
+| **Tone** | `strict` (rules only) or `flexible` (preferred patterns with context) | `flexible` |
+
+## Examples
+
+### Auto-detect from Codebase
+
+```text
+[user]
+> /generate-copilot-instructions #codebase
+
+[skill]
+> Scanning codebase...
+> Detected: TypeScript, Next.js 14 (App Router), Tailwind CSS, Prisma, PostgreSQL
+> Found: ESLint (Airbnb config), Prettier, Vitest, Playwright
+> Generating instructions based on detected configuration...
+```
+
+### Guided Mode
+
+```text
+[user]
+> /generate-copilot-instructions
+
+[skill]
+> Let's build your copilot-instructions.md. What's your primary language and key framework?
+
+[user]
+> Python, FastAPI, PostgreSQL, SQLAlchemy async, Pytest
+
+[skill]
+> Got it. Do you have a preferred code style? (e.g., Black + Ruff, max line length, quote style)
+```
+
+## Tips
+
+- **Forbidden patterns** are often the highest-impact instructions — add every anti-pattern your team has encountered
+- **Version specificity matters**: "Next.js 14 App Router" produces better output than "React"
+- **Iterate after a week**: note where Copilot still makes mistakes and add those as explicit forbidden patterns
+- **Community patterns**: Browse [Skills Hub](https://skillshub.io) to find community-rated `copilot-instructions.md` configurations for your specific stack — useful as reference points or baselines to compare against your generated output