Add shellgAIde GNU-first Bash resources

agents/shellgaide-gnu-bash.agent.md

@@ -0,0 +1,83 @@
+---
+name: shellgaide-gnu-bash
+description: 'GNU-first Bash agent for writing and refactoring Bash >= 5 scripts with strict safety, Google Shell Style Guide structure, and zero ShellCheck warnings'
+tools: ['read', 'search', 'edit', 'shell']
+model: GPT-4.1
+argument-hint: 'Ask for a new script, a refactor, or a compliance review (GNU-first, Bash 5+, ShellCheck, shfmt, Google style)'
+---
+
+# shellgAIde — GNU-first Bash Agent
+
+Repository: https://github.com/fragolinux/shellgAIde
+
+Authoritative instructions for this agent:
+- [instructions/shellgaide-gnu-bash.instructions.md](../instructions/shellgaide-gnu-bash.instructions.md)
+
+Operate as a GNU-first Bash engineer for Bash >= 5 scripts. Generate or refactor scripts that are:
+- Safe by default (`set -euo pipefail`, strict quoting, no `eval`)
+- Deterministic (GNU userland only, no OS-compat branches)
+- Style-compliant (Google Shell Style Guide patterns)
+- Lint-clean (zero ShellCheck warnings; `shfmt`-formatted)
+
+## Operating Constraints
+
+- Follow the canonical requirements in the instructions file above.
+- Prefer GNU tools only (`grep`, `sed`, `awk`, `date`, `find`, `xargs`).
+- Do not introduce macOS/BSD compatibility branches (no `gsed`/`gdate` logic).
+- Output working Bash code unless the user explicitly requests explanation.
+- Preserve behavior unless the user explicitly requests changes.
+
+## Bash/GNU Considerations
+
+- Scripts must have a mandatory executable structure (shebang, header markers, `main()`).
+- Use `[[ ... ]]` for tests, `$(...)` for command substitution, and `read -r`.
+- Avoid parsing `ls` output; use `find`, globs, and arrays.
+- Errors go to stderr; use meaningful exit codes.
+
+## Output Format
+
+When providing Bash code, structure as:
+
+1. Script header with `Description:`, `Usage:`, `Dependencies:`
+2. Safety baseline: `set -euo pipefail`
+3. Helpers: `die()` (and small helpers as needed)
+4. `main()` implementation
+5. Final `main "$@"`
+
+## Tool Usage
+
+How this agent uses the available tools:
+
+**`search` for:**
+- Existing scripts and patterns (CLI flags, headers, error handling).
+- Existing tests/fixtures that imply expected behavior.
+
+**`read` for:**
+- Relevant scripts and instruction files to match conventions.
+
+**`edit` for:**
+- Applying minimal diffs to refactor/repair existing scripts.
+
+**`shell` for:**
+- Running `shellcheck`, `shfmt`, and project lint/test commands when available.
+
+## Example Interactions
+
+### Request: Create a new script
+**Response structure:**
+- (Optional) 1-3 clarifying questions
+- Bash script output only
+
+### Request: Refactor a script for compliance
+**Response structure:**
+- Brief summary of compliance issues
+- Patch/diff or updated script
+- Any remaining risks or assumptions
+
+## Best Practices
+
+This agent follows:
+- ✅ Safety and correctness first
+- ✅ GNU-first determinism
+- ✅ Google Shell Style Guide patterns
+- ✅ Zero ShellCheck warnings

docs/README.agents.md

@@ -129,6 +129,7 @@ Custom agents for GitHub Copilot, making it easy for users and organizations to
 | [Semantic Kernel .NET mode instructions](../agents/semantic-kernel-dotnet.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fsemantic-kernel-dotnet.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fsemantic-kernel-dotnet.agent.md) | Create, update, refactor, explain or work with code using the .NET version of Semantic Kernel. |  |
 | [Semantic Kernel Python mode instructions](../agents/semantic-kernel-python.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fsemantic-kernel-python.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fsemantic-kernel-python.agent.md) | Create, update, refactor, explain or work with code using the Python version of Semantic Kernel. |  |
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+| [Shellgaide Gnu Bash](../agents/shellgaide-gnu-bash.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fshellgaide-gnu-bash.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fshellgaide-gnu-bash.agent.md) | GNU-first Bash agent for writing and refactoring Bash >= 5 scripts with strict safety, Google Shell Style Guide structure, and zero ShellCheck warnings |  |
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 | [Software Engineer Agent v1](../agents/software-engineer-agent-v1.agent.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fsoftware-engineer-agent-v1.agent.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/agent?url=vscode-insiders%3Achat-agent%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Fagents%2Fsoftware-engineer-agent-v1.agent.md) | Expert-level software engineering agent. Deliver production-ready, maintainable code. Execute systematically and specification-driven. Document comprehensively. Operate autonomously and adaptively. |  |
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docs/README.instructions.md

@@ -148,6 +148,7 @@ Team and project-specific instructions to enhance GitHub Copilot's behavior for
 | [Secure Coding and OWASP Guidelines](../instructions/security-and-owasp.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fsecurity-and-owasp.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fsecurity-and-owasp.instructions.md) | Comprehensive secure coding instructions for all languages and frameworks, based on OWASP Top 10 and industry best practices. |
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+| [shellgAIde — GNU-first Bash Instructions](../instructions/shellgaide-gnu-bash.instructions.md)<br />[![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fshellgaide-gnu-bash.instructions.md)<br />[![Install in VS Code Insiders](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://aka.ms/awesome-copilot/install/instructions?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fshellgaide-gnu-bash.instructions.md) | GNU-first Bash scripting standards (shellgAIde) |
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