# Clean Code Git Plumbing For Repos With Large Pack Files

> Sub-skill of clean-code: Git Plumbing for Repos with Large Pack Files (+1).

- Skill: `vamseeachanta/clean-code-git-plumbing-for-repos-with-large-pack-files` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/clean-code-git-plumbing-for-repos-with-large-pack-files`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/clean-code-git-plumbing-for-repos-with-large-pack-files/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/clean-code-git-plumbing-for-repos-with-large-pack-files

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# Git Plumbing for Repos with Large Pack Files (+1)

## Git Plumbing for Repos with Large Pack Files


`git commit` hangs indefinitely on repos with pack files ≥4GB (e.g., digitalmodel). Use
plumbing commands instead:

```bash
# Standard commit — HANGS on repos with large pack files
git commit -m "message"   # ← do NOT use

# Plumbing workflow — always safe regardless of repo size
TREE=$(git write-tree)
PARENT=$(git rev-parse HEAD)
COMMIT=$(git commit-tree "$TREE" -p "$PARENT" -m "your message here")
git update-ref HEAD "$COMMIT"
```

After this, update the hub-level submodule pointer:

```bash
# From workspace-hub root
git add <submodule-dir>
git commit -m "chore: update <submodule> pointer"
```


## Parallel Execution for Multi-Repo God Object Sprints


When splitting files across multiple repos simultaneously:

```
TeamCreate → spawn agent-repo-A + agent-repo-B in parallel
  agent-repo-A: handles one repo (worldenergydata)
  agent-repo-B: handles other repo (digitalmodel)

Rules:
  - Never run two agents on the SAME repo concurrently (index.lock contention)
  - Update hub submodule pointer AFTER each repo agent completes
  - agent-repo-B should not start WRK-592 until WRK-591 is committed
    (same __init__.py in same repo — sequential within a repo, parallel across repos)
```

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