/harness-checkpoint

Save session progress - commits, pushes, creates/updates PR, archives completed features

Create a checkpoint of the current session:

## Phase 1: Update Progress

1. Update `claude-progress.json` with:
   - Summary of what was accomplished this session
   - Any blockers encountered
   - Recommended next steps
   - Update lastUpdated timestamp

## Phase 2: Build & Test

2. Run build/test commands appropriate for the project
   - Check for errors and fix if possible
   - Report any failures

## Phase 3: Commit & Push

3. ALWAYS commit changes:
   - Stage all modified files (except secrets/env files)
   - Write descriptive commit message summarizing the work
   - Push to remote

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