Target: every skill's description fits in a one-line gateway menu and
leads with trigger keywords an agent would match on. Drops filler like
'Use this skill to', 'A skill for', 'This skill provides'.
Before: max description length was 791 chars (architecture-diagram),
74 of 81 built-in skills were >60 chars.
After: max 60, mean 54, all 81 built-in skills <=60.
Rewritten with double-quoted YAML scalars to preserve Chinese/arrow
glyphs (baoyu-comic, yuanbao, youtube-content).
* fix(github-auth): check ~/.hermes/.env before ~/.git-credentials for token extraction
Users who configured their token via `hermes setup` have it stored in
~/.hermes/.env (GITHUB_TOKEN=...), not in ~/.git-credentials. On macOS
with osxkeychain as the default git credential helper, ~/.git-credentials
may not exist at all, causing silent 401 failures in all GitHub skills.
Add ~/.hermes/.env as the first fallback in the auth detection block and
the inline "Extracting the Token from Git Credentials" example.
Priority order: env var → ~/.hermes/.env → ~/.git-credentials → none
Part of fix for NousResearch/hermes-agent#3464
* fix(github-auth): check ~/.hermes/.env before ~/.git-credentials
Fixes#3464
* fix(github-auth): check ~/.hermes/.env before ~/.git-credentials
Fixes#3464
* fix(github-auth): check ~/.hermes/.env before ~/.git-credentials
Fixes#3464
* fix(github-auth): check ~/.hermes/.env before ~/.git-credentials
Fixes#3464
* fix(github-auth): check ~/.hermes/.env before ~/.git-credentials
Fixes#3464
* fix(github-auth): check ~/.hermes/.env before ~/.git-credentials
Fixes#3464
