HKTITAN/compression-utils
.cursor/skills/compression-utils/SKILL.md
Work with the URL compression system in kheMessage. Use when modifying how content is stored in URLs, debugging encoding issues, or optimizing compression.
development
Updated Apr 16, 2026
$ install --global
skillsauthnpx skillsauth add HKTITAN/kheMessage compression-utilsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 17, 2026, 12:57 AM44.1s1 file scanned
SKILL.md
- name:
- compression-utils
- description:
- Work with the URL compression system in kheMessage. Use when modifying how content is stored in URLs, debugging encoding issues, or optimizing compression.
Compression Utilities Skill
Work with the URL-based storage and compression system.
When to Use
- Debugging URL encoding issues
- Optimizing compression performance
- Extending the storage format
- Handling special characters
Compression Pipeline
blocks → serializeBlocks (binary + compact props) → CompressionStream (deflate or brotli) → format byte + Base85 → URL hash
Format Versions
| Format byte | Encoding | Compression | |-------------|----------|-------------| | (legacy) | base64url | deflate-raw | | 0x01 | base64url | deflate-raw | | 0x02 | base85 | deflate-raw | | 0x03 | base85 | encrypted (AES-GCM) | | 0x04 | base85 | brotli |
Format detection: if hash contains chars outside base64url (A-Za-z0-9_-), it's base85. Otherwise legacy base64url.
Compact Property Keys
Block properties use short keys when serialized:
lang→lchecked→cstart→semoji→edepth→d
Encryption (Format 0x03)
AES-GCM-256 with PBKDF2 key derivation (120k iterations). Payload: salt(12) + IV(12) + ciphertext+tag(16). Triggered via "Lock with password" in Share menu.
URL Structure
https://example.com/?theme=dark#base85EncodedContent
Limitations
- URL length limits (~2000 chars safe, ~8000 max in modern browsers)
- Base85 adds ~25% overhead (vs base64 ~33%)
- Brotli supported in Safari 18.4+, Firefox 147+; deflate used as fallback
Debugging Tips
- Check browser console for compression errors
- Test with content containing special characters
- Verify URL doesn't exceed limits
- Use DevTools Network tab to check actual URL
- For encrypted content: ensure Web Crypto API is available
Related Skills
HKTITAN/web-design-guidelines
development
VerifiedTrustedCommunity
Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my site against best practices".
SKILL.mdUpdated Apr 16, 2026
HKTITAN/vercel-deploy
development
VerifiedTrustedCommunity
Deploy applications and websites to Vercel. Use this skill when the user requests deployment actions such as "Deploy my app", "Deploy this to production", "Create a preview deployment", "Deploy and give me the link", or "Push this live". No authentication required - returns preview URL and claimable deployment link.
SKILL.mdUpdated Apr 16, 2026
HKTITAN/theme-customization
testing
VerifiedTrustedCommunity
Customize or extend the theming system in kheMessage. Use when adding new themes, modifying colors, or enhancing theme switching.
SKILL.mdUpdated Apr 16, 2026
HKTITAN/qr-code
development
VerifiedTrustedCommunity
Work with QR code generation and display. Use when modifying QR functionality, fixing QR rendering, or adding QR features.
SKILL.mdUpdated Apr 16, 2026