feat: improve hackmd-cli skill score to 100%

[popey]

Hullo @hackmdio 👋

I'm a fellow hackmd abuser! Thanks for maintaining it. Having used a bazillion notes "apps" over the years, this is the only one that has stuck in my silly brain!

I ran your skills through tessl skill review at work and found some targeted improvements. Here's the full before/after:

Skill	Before	After	Change
hackmd-cli	94%	100%	+6%

Changes summary

The hackmd-cli skill was already well-crafted (94%) — the only dimension below perfect was workflow_clarity (2/3). The changes are minimal and targeted:

• Added verification steps to the "Sync local file to HackMD" workflow so users can confirm operations succeeded (e.g., retrieving the note after creation, previewing content after update)
• Added an Error Handling section with a table covering common failure scenarios (Unauthorized, Not Found, Forbidden) and their fixes — giving users a clear troubleshooting path

These two additions moved the content score from 88% to 100%, with workflow_clarity improving from 2/3 to 3/3.

Honest disclosure — I work at @tesslio where we build tooling around skills like these. Not a pitch - just saw room for improvement and wanted to contribute.

Want to self-improve your skills? Just point your agent (Claude Code, Codex, etc.) at this Tessl guide and ask it to optimize your skill. Ping me - @popey - if you hit any snags.

Thanks in advance 🙏

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Note

Low Risk
Documentation-only updates that add workflow verification commands and troubleshooting guidance; no runtime or API behavior changes.

Overview
Improves the hackmd-cli skill documentation by adding post-action verification steps to the “Sync local file to HackMD” workflow (confirming note creation and previewing exported content after updates).

Adds a new Error Handling section with a quick reference table for common failures (Unauthorized, Not Found, Forbidden) and suggested fixes.

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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PR description file accidentally committed to repository

Medium Severity

The pr_description.md file is the PR description text accidentally committed to the repository. This file has no purpose in the project — it's a draft/copy of the GitHub PR body, including promotional content and a reference to a non-existent score_card.png. It doesn't belong in the codebase and would clutter the repository root.