chore: reword blog posts for consistent voice and reorganize tags

- Rewrote prose on 13 posts to match the established writing style:
  direct first-person, punchy lede (##), ### sections, --- separators,
  no H1 in post body, no "hope this helps" closings
- Replaced single-use and redundant tags with a stable 14-tag vocabulary
- Added AGENT.md as a style and tag reference for future agent sessions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

AGENT.md

@@ -0,0 +1,78 @@
+# Agent Reference
+
+Guidelines for AI agents working on this blog.
+
+---
+
+## Blog Post Style
+
+- **Voice:** First-person, direct, opinionated. No preamble, no "Hope this helps" closings.
+- **Opening:** Hook into a specific frustration or observation. Skip the generic intro.
+- **Headings:**
+  - `##` — lede/subtitle (one per post, immediately after the title, punchy)
+  - `###` — main sections
+  - `---` — horizontal rule between sections
+  - No `#` (H1) anywhere in the post body
+- **Closing:** End decisively. A statement, not a sendoff.
+- **Grammar:** Correct. No "Do you ever wondering", no "Let's get started!"
+- **Tone reference:** See the three most recent posts by date.
+
+---
+
+## Tag System
+
+### Current Vocabulary
+
+| Tag                   | Description                                                               |
+| --------------------- | ------------------------------------------------------------------------- |
+| `linux`               | Linux-specific content — distros, tools, fixes                            |
+| `flutter`             | Flutter framework, mobile development                                     |
+| `android`             | Android-specific content, ADB, AVD                                        |
+| `windows`             | Windows-specific content, PowerShell, Win tooling                         |
+| `git`                 | Git commands, workflows, hosting                                          |
+| `hardware`            | Physical hardware, drivers, firmware quirks                               |
+| `ai`                  | AI-assisted development, LLM tools, agents                                |
+| `dev-setup`           | Developer environment, tooling, workflow, DX                              |
+| `dart`                | Dart language, Dart-specific libraries                                    |
+| `go`                  | Go language                                                               |
+| `craftsmanship`       | Software design, architecture, TDD, DDD, Clean Architecture, code quality |
+| `self-hosting`        | Self-hosted services, VPS, infrastructure                                 |
+| `distributed-systems` | Distributed data, sync, CRDTs, consensus                                  |
+| `misc`                | Catch-all for posts that don't fit elsewhere                              |
+
+### Per-Post Tags (current state)
+
+| Post                                         | Tags                           |
+| -------------------------------------------- | ------------------------------ |
+| stop-stashing-use-git-worktree               | `git`, `dev-setup`             |
+| vibe-coding-still-needs-a-craftsman          | `ai`, `craftsmanship`          |
+| building-my-own-self-hosted-music-library    | `linux`, `self-hosting`        |
+| building-load-testing-script-with-claude     | `go`, `ai`                     |
+| crdt-conflict-free-replicated-data-types     | `dart`, `distributed-systems`  |
+| fix-adb-unsufficient-permission-linux        | `linux`, `android`             |
+| fix-infinix-air-pro-plus-quad-speakers-linux | `linux`, `hardware`            |
+| fix-infinix-air-pro-plus-screen-color        | `windows`, `linux`, `hardware` |
+| flutter-android-emulator-not-showing         | `flutter`, `android`           |
+| flutter-clean-architecture                   | `flutter`, `craftsmanship`     |
+| immutable-workstation-fedora-kinoite         | `linux`, `dev-setup`           |
+| kuwot (draft)                                | `flutter`, `dart`              |
+| remap-copilot-key-infinix-air-pro-plus       | `linux`, `hardware`            |
+| sign-github-commit-on-windows                | `git`, `windows`               |
+| using-direnv-in-powershell-on-windows        | `windows`, `dev-setup`         |
+| welcome                                      | `misc`                         |
+
+### Rules for Tags
+
+**When tagging a post:**
+
+- Use 2–4 tags per post. More than 4 is a sign you're being too specific.
+- Prefer tags from the existing vocabulary above.
+- A tag should describe what the post _is about_, not every concept it _mentions_.
+
+**When adding a new tag:**
+
+- Ask: will this tag apply to at least one other existing post, or is it clearly a category this blog will write about again?
+- If yes: add it to the vocabulary table above and apply it.
+- If no: fold into an existing tag or leave it out.
+- Do not add tags for topics covered once and unlikely to recur (e.g. `music`, `testing`, `open-source`).
+- Document new tags in this file.