Add LinkedIn Post Formatter skill and LinkedIn Post Writer agent 🤖🤖🤖 (#1392)

* feat(skills,agents): add LinkedIn post formatter skill and writer agent

Add self-contained LinkedIn post formatting skill with Unicode bold/italic
character mapping and engagement-optimized post structure patterns.
Add LinkedIn Post Writer agent for transforming raw content into
copy-paste-ready LinkedIn posts. No external service dependencies.

* fix: address Copilot review comments on PR #1392

- Correct Unicode range header to include digit range (U+1D7EC–U+1D7F5)
- Add explicit instruction to load references/unicode-charmap.md
- Fix LinkedIn casing in README.agents.md (Linkedin → LinkedIn)

* fix: use display name for LinkedIn agent to preserve brand casing

The name field now uses 'LinkedIn Post Writer' instead of the slug
format, ensuring the auto-generated README table shows correct casing.

---------

Co-authored-by: Shailesh Mishra <shaileshmishra@example.com>

Author: sendtoshailesh

agents/linkedin-post-writer.agent.md

@@ -0,0 +1,57 @@
+---
+name: "LinkedIn Post Writer"
+description: "Draft and format compelling LinkedIn posts with Unicode bold/italic styling, visual separators, and engagement-optimized structure. Transforms raw content, technical material, images, or ideas into copy-paste-ready LinkedIn posts."
+tools: ["codebase", "fetch"]
+---
+
+# LinkedIn Post Writer
+
+Specialized agent for crafting high-engagement LinkedIn posts formatted with Unicode typography that renders natively in the LinkedIn editor. Transforms any input — raw text, technical content, HTML files, images, or ideas — into polished, copy-paste-ready posts.
+
+## Capabilities
+
+- Convert technical content (cheatsheets, research, blog posts) into distilled LinkedIn posts.
+- Apply Unicode bold (𝗯𝗼𝗹𝗱), italic (𝘪𝘵𝘢𝘭𝘪𝘤), and bold-italic (𝙗𝙤𝙡𝙙-𝙞𝙩𝙖𝙡𝙞𝙘) formatting.
+- Structure posts with visual separators, bullet points, and flow arrows.
+- Optimize for LinkedIn's algorithm: hook above the fold, whitespace, CTA, hashtags.
+- Adapt tone for thought leadership, resource sharing, storytelling, or announcements.
+
+## Workflow
+
+### Phase 1: Analyze Input
+
+1. Read the source material (file, text, URL, or image).
+2. Identify the core message and 3-5 key takeaways.
+3. Determine the best post pattern:
+   - **Resource Share** — for cheatsheets, guides, tools, downloads.
+   - **Thought Leadership** — for opinions, insights, lessons learned.
+   - **Listicle** — for tips, steps, comparisons.
+   - **Story → Lesson** — for personal experience, case studies.
+
+### Phase 2: Draft Post
+
+1. Write a compelling hook (first 2 lines must trigger "see more" click).
+2. Structure the body using the selected pattern.
+3. Apply Unicode formatting:
+   - Bold for section headers, key phrases, and emphasis.
+   - Italic for technical terms, subtle emphasis, or quotes.
+   - Bold digits for numbered lists (𝟭. 𝟮. 𝟯.).
+4. Add section dividers (━━━━━━━━━━━━━━━━━━━━━━) between major sections.
+5. Use ◈ or ↳ for bullet/sub-bullet points.
+6. Write a clear CTA and add 5-8 relevant hashtags.
+
+### Phase 3: Polish
+
+1. Verify post is under 3000 characters (aim for 1500-2500).
+2. Confirm the first 210 characters create curiosity (the "see more" threshold).
+3. Ensure no URLs in the post body (suggest adding in comments).
+4. Check whitespace: short paragraphs, single blank lines, scannable layout.
+5. Present the final post inside a fenced block for easy copy-paste.
+
+## Formatting Conventions
+
+- No emojis in body text unless explicitly requested. Exception: ♻️ in CTA.
+- No Markdown syntax (**, ##, etc.) — only Unicode characters.
+- Hashtags on the final line, no mid-post hashtags.
+- Bold sparingly — headers and key phrases only, not entire sentences.
+- One blank line between paragraphs. LinkedIn collapses multiple blank lines.

docs/README.agents.md

@@ -115,6 +115,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-agents) for guidelines on how to
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 | [Lingo.dev Localization (i18n) Agent](../agents/lingodotdev-i18n.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%2Flingodotdev-i18n.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%2Flingodotdev-i18n.agent.md) | Expert at implementing internationalization (i18n) in web applications using a systematic, checklist-driven approach. | lingo<br />[![Install MCP](https://img.shields.io/badge/Install-VS_Code-0098FF?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-vscode?name=lingo&config=%7B%22command%22%3A%22%22%2C%22args%22%3A%5B%5D%2C%22env%22%3A%7B%7D%7D)<br />[![Install MCP](https://img.shields.io/badge/Install-VS_Code_Insiders-24bfa5?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-vscodeinsiders?name=lingo&config=%7B%22command%22%3A%22%22%2C%22args%22%3A%5B%5D%2C%22env%22%3A%7B%7D%7D)<br />[![Install MCP](https://img.shields.io/badge/Install-Visual_Studio-C16FDE?style=flat-square)](https://aka.ms/awesome-copilot/install/mcp-visualstudio/mcp-install?%7B%22command%22%3A%22%22%2C%22args%22%3A%5B%5D%2C%22env%22%3A%7B%7D%7D) |
+| [LinkedIn Post Writer](../agents/linkedin-post-writer.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%2Flinkedin-post-writer.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%2Flinkedin-post-writer.agent.md) | Draft and format compelling LinkedIn posts with Unicode bold/italic styling, visual separators, and engagement-optimized structure. Transforms raw content, technical material, images, or ideas into copy-paste-ready LinkedIn posts. |  |
 | [Markdown Accessibility Assistant](../agents/markdown-accessibility-assistant.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%2Fmarkdown-accessibility-assistant.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%2Fmarkdown-accessibility-assistant.agent.md) | Improves the accessibility of markdown files using five GitHub best practices |  |
 | [MAUI Expert](../agents/dotnet-maui.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%2Fdotnet-maui.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%2Fdotnet-maui.agent.md) | Support development of .NET MAUI cross-platform apps with controls, XAML, handlers, and performance best practices. |  |
 | [MCP M365 Agent Expert](../agents/mcp-m365-agent-expert.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%2Fmcp-m365-agent-expert.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%2Fmcp-m365-agent-expert.agent.md) | Expert assistant for building MCP-based declarative agents for Microsoft 365 Copilot with Model Context Protocol integration |  |

docs/README.skills.md

@@ -187,6 +187,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
 | [kotlin-mcp-server-generator](../skills/kotlin-mcp-server-generator/SKILL.md) | Generate a complete Kotlin MCP server project with proper structure, dependencies, and implementation using the official io.modelcontextprotocol:kotlin-sdk library. | None |
 | [kotlin-springboot](../skills/kotlin-springboot/SKILL.md) | Get best practices for developing applications with Spring Boot and Kotlin. | None |
 | [legacy-circuit-mockups](../skills/legacy-circuit-mockups/SKILL.md) | Generate breadboard circuit mockups and visual diagrams using HTML5 Canvas drawing techniques. Use when asked to create circuit layouts, visualize electronic component placements, draw breadboard diagrams, mockup 6502 builds, generate retro computer schematics, or design vintage electronics projects. Supports 555 timers, W65C02S microprocessors, 28C256 EEPROMs, W65C22 VIA chips, 7400-series logic gates, LEDs, resistors, capacitors, switches, buttons, crystals, and wires. | `references/28256-eeprom.md`<br />`references/555.md`<br />`references/6502.md`<br />`references/6522.md`<br />`references/6C62256.md`<br />`references/7400-series.md`<br />`references/assembly-compiler.md`<br />`references/assembly-language.md`<br />`references/basic-electronic-components.md`<br />`references/breadboard.md`<br />`references/common-breadboard-components.md`<br />`references/connecting-electronic-components.md`<br />`references/emulator-28256-eeprom.md`<br />`references/emulator-6502.md`<br />`references/emulator-6522.md`<br />`references/emulator-6C62256.md`<br />`references/emulator-lcd.md`<br />`references/lcd.md`<br />`references/minipro.md`<br />`references/t48eeprom-programmer.md` |
+| [linkedin-post-formatter](../skills/linkedin-post-formatter/SKILL.md) | Format and draft compelling LinkedIn posts using Unicode bold/italic styling, visual separators, structured sections, and engagement-optimized patterns. USE FOR: draft LinkedIn post, format text for LinkedIn, create social media post, write thought leadership post, convert content to LinkedIn format, LinkedIn carousel text, Unicode bold italic formatting. | `references/unicode-charmap.md` |
 | [lsp-setup](../skills/lsp-setup/SKILL.md) | Enable code intelligence (go-to-definition, find-references, hover, type info) for any programming language by installing and configuring an LSP server for Copilot CLI. Detects the OS, installs the right server, and generates the JSON configuration (user-level or repo-level). Use when you need deeper code understanding and no LSP server is configured, or when the user asks to set up, install, or configure an LSP server. | `references/lsp-servers.md` |
 | [make-repo-contribution](../skills/make-repo-contribution/SKILL.md) | All changes to code must follow the guidance documented in the repository. Before any issue is filed, branch is made, commits generated, or pull request (or PR) created, a search must be done to ensure the right steps are followed. Whenever asked to create an issue, commit messages, to push code, or create a PR, use this skill so everything is done correctly. | `assets/issue-template.md`<br />`assets/pr-template.md` |
 | [make-skill-template](../skills/make-skill-template/SKILL.md) | Create new Agent Skills for GitHub Copilot from prompts or by duplicating this template. Use when asked to "create a skill", "make a new skill", "scaffold a skill", or when building specialized AI capabilities with bundled resources. Generates SKILL.md files with proper frontmatter, directory structure, and optional scripts/references/assets folders. | None |