kshitij f210510276 feat: add prerequisites field to skill spec — hide skills with unmet dependencies

Skills can now declare runtime prerequisites (env vars, CLI binaries) via
YAML frontmatter. Skills with unmet prerequisites are excluded from the
system prompt so the agent never claims capabilities it can't deliver, and
skill_view() warns the agent about what's missing.

Three layers of defense:
- build_skills_system_prompt() filters out unavailable skills
- _find_all_skills() flags unmet prerequisites in metadata
- skill_view() returns prerequisites_warning with actionable details

Tagged 12 bundled skills that have hard runtime dependencies:
gif-search (TENOR_API_KEY), notion (NOTION_API_KEY), himalaya, imessage,
apple-notes, apple-reminders, openhue, duckduckgo-search, codebase-inspection,
blogwatcher, songsee, mcporter.

Closes #658
Fixes #630

2026-03-08 13:19:32 +05:30

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name

description

version

author

license

metadata

prerequisites

blogwatcher

Monitor blogs and RSS/Atom feeds for updates using the blogwatcher CLI. Add blogs, scan for new articles, and track what you've read.

1.0.0

community

MIT

hermes

Blogwatcher

Track blog and RSS/Atom feed updates with the blogwatcher CLI.

Prerequisites

Go installed (go version to check)
Install: go install github.com/Hyaxia/blogwatcher/cmd/blogwatcher@latest

Common Commands

Add a blog: blogwatcher add "My Blog" https://example.com
List blogs: blogwatcher blogs
Scan for updates: blogwatcher scan
List articles: blogwatcher articles
Mark an article read: blogwatcher read 1
Mark all articles read: blogwatcher read-all
Remove a blog: blogwatcher remove "My Blog"

Example Output

$ blogwatcher blogs
Tracked blogs (1):

  xkcd
    URL: https://xkcd.com

$ blogwatcher scan
Scanning 1 blog(s)...

  xkcd
    Source: RSS | Found: 4 | New: 4

Found 4 new article(s) total!

Notes

Use blogwatcher <command> --help to discover flags and options.

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