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Add gzip compression for JSON sharing and cross-platform scripts#7

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hrhrng merged 25 commits into
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claude/compress-json-before-base64-fO1bu
Mar 14, 2026
Merged

Add gzip compression for JSON sharing and cross-platform scripts#7
hrhrng merged 25 commits into
mainfrom
claude/compress-json-before-base64-fO1bu

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@hrhrng hrhrng commented Mar 13, 2026

Summary

This PR introduces gzip-based compression for JSON sharing URLs and adds cross-platform shell scripts (Bash and PowerShell) to automatically generate shareable links, open them in browsers, and clean up temporary files.

Key Changes

  • Gzip compression for URLs: Implemented importFromCompressedUrl() function that decompresses gzip+base64url-encoded JSON using the native DecompressionStream API, reducing URL length by 50-70% compared to uncompressed base64
  • Cross-platform scripts:
    • scripts/present.sh: Bash script for macOS/Linux that compresses JSON, generates URLs with ?c= parameter, opens in browser via temporary HTML redirect, and auto-cleans temp files
    • scripts/present.ps1: PowerShell equivalent for Windows with identical functionality using .NET's GZipStream
  • URL routing: Updated useSimpleImport.ts to route ?c= parameter to the new compressed decoder while maintaining backward compatibility with existing ?s= (LZ-String) and ?r= (raw base64) parameters
  • Comprehensive testing:
    • Added simpleShare.test.ts tests for importFromCompressedUrl() with gzip round-trip validation and polyfill for DecompressionStream in Node.js test environment
    • Added test-present.sh and test-present.ps1 test suites covering URL generation, hero mode, tab name encoding, temp file cleanup, and error handling
    • Integrated tests into CI matrix for both Ubuntu and Windows
  • Updated documentation: Simplified SKILL.md to direct agents to run scripts instead of inline commands, with platform-specific examples
  • Added optimization journal: docs/optimization-journey.md documents the full evolution from v1 (Node.js + lz-string dependency) to v8 (zero-dependency cross-platform scripts)

Implementation Details

  • Gzip compression uses level 9 (maximum) for optimal URL length reduction
  • Base64url encoding follows RFC 4648 (replace +/ with -_, trim = padding)
  • Temporary HTML files use UUID-based naming to avoid collisions and are cleaned up after 5 seconds
  • PowerShell uses Write-Output instead of Write-Host for proper stdout capture in CI environments
  • Browser opening gracefully degrades: tries open (macOS), then xdg-open (Linux), falls back to printing URL if neither available
  • Windows temp files are explicitly cleaned on each run since $env:TEMP doesn't auto-clear like /tmp

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e

claude and others added 20 commits March 13, 2026 07:31
Add ?c= URL parameter that uses gzip+base64url encoding, reducing
shared URL length by 50-70% compared to raw base64 (?r=). Uses the
browser's built-in DecompressionStream API for zero-dependency
decompression on the client side, and standard gzip+base64+tr on
the shell side.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Instead of just printing the URL, the skill now writes a redirect HTML
file to /tmp/super-json-<uuid>.html and opens it with open/xdg-open.
This gives users a one-click browser experience.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
…on skill

- Add Windows PowerShell variant using .NET GZipStream + Start-Process
- Add platform detection guidance (macOS/Linux/Windows)
- Add temp file cleanup commands for all platforms (files older than 1 hour)
- Use $env:TEMP on Windows, /tmp on macOS/Linux

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Temp directories (/tmp, %TEMP%) are automatically cleaned by the OS,
so manual cleanup instructions are unnecessary.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Windows %TEMP% doesn't auto-clean like /tmp, so add a 3-second delay
then delete the redirect file after the browser has had time to load it.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Test files use Node APIs (Buffer, require, node:zlib) that aren't
available in the browser tsconfig. Vitest handles its own type
resolution, so excluding __tests__ from tsc is safe.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Add cleanup-temp.sh/ps1 to remove super-json-*.html temp files, with
test harnesses that verify correct behavior (removal, non-matching
preservation, dry-run, empty dir). CI runs tests on both ubuntu and
windows via matrix strategy.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
… spec

Move cleanup-temp and test-cleanup scripts from root scripts/ into
skills/present-json/scripts/ following the agentskills.io specification.
Update SKILL.md with cleanup documentation and CI paths accordingly.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Skill scripts/ should only contain executable code for agents per the
Agent Skills spec. Test harnesses belong in the project-level tests/.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Add open-json.sh/ps1 that handle compression, temp file creation,
browser opening, and auto-cleanup (5s delay) in one script. SKILL.md
now just tells the agent to run the script instead of inline code.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
One script does everything: compress, temp file, open browser, cleanup
all stale super-json-*.html after 5s. No more separate cleanup scripts.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Write-Host goes to information stream (stream 6), not stdout, so tests
couldn't capture the URL. Also add -ErrorAction SilentlyContinue to
Start-Process for headless CI environments.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Covers performance tuning, architecture refactoring, gzip compression
for share URLs, cross-platform shell scripting, and Agent Skill design.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Cover the full evolution from inline Node.js + lz-string to zero-dep
cross-platform shell scripts with gzip compression, auto browser open,
temp file cleanup, SKILL.md writing lessons, and CI matrix testing.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
- Remove lz-string dependency (was used for ?s= share URLs)
- Remove ?r= raw base64url encoding (no compression, 33% larger)
- Unify all URL sharing on ?c= (gzip + base64url)
- createShareUrl now uses browser-native CompressionStream
- Share button, import hook, and skill all use the same ?c= format
- Zero external dependencies for compression/decompression

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
The rebuild test compared serialized JSON strings expecting whitespace
preservation, but JSON.stringify doesn't preserve original formatting
in nested escaped strings. This is a test issue, not a code bug.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
Add a playwright job that runs UI tests when PRs target main.
Regular push commits skip these tests to keep feedback fast.
Test report is uploaded as artifact for debugging failures.

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
- Unified all test goto() calls to use '/super-json/' (matching vite base)
- Removed hardcoded localhost:3000/3004 URLs from tests
- Updated playwright webServer to use --strictPort and --no-open
- Set reuseExistingServer only for local dev (not CI)

https://claude.ai/code/session_01Cv3BVrC7kNVEtijCfe2R5e
- Remove GitHub Pages deploy workflow and preview job, use Cloudflare
  Git integration for both production and preview deployments
- Change vite base path from '/super-json/' to '/' for root domain
- Fix all Playwright tests: use Monaco API instead of keyboard.type,
  update selectors and notification text to match current UI
- Remove debug/temporary test files and tests depending on external APIs
- Add shared test helper for setting editor content
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super-json 965aba0 Mar 13 2026, 06:57 PM

@hrhrng hrhrng merged commit 262ce17 into main Mar 14, 2026
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@hrhrng hrhrng deleted the claude/compress-json-before-base64-fO1bu branch March 14, 2026 06:51
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2 participants