Context

JSS ships a `--git` flag that enables a Git HTTP backend — the pod becomes a real git remote for any path the user has ACL Read / Write on. jspod currently doesn't pass `--git` to JSS, so every fresh `npx jspod` is missing this capability for no good reason.

Turning it on by default unlocks meaningful surface area without any new code:

• `git clone http://localhost:5444/public/apps/` — clone any public app or resource the pod hosts
• `git push http://localhost:5444/public/apps/` — push updates as the pod owner (DPoP-bound auth, gated by ACL Write)
• `git pull` — keep a local working copy in sync with the pod
• Two-way collaboration: multiple devs can collaborate on a Solid app hosted in a shared pod

Proposal

Add `--git` to jspod's default spawn args. Add `--no-git` flag for users who want to opt out. Update docs.

Out of scope (separate issues)

• Init / server-side clone — JSS doesn't currently let you create a new bare repo at a pod path over HTTP. Without that, `git push` to a fresh path 404s. Filed upstream as JSS init primitive issue (see comments below for the exact link). This issue is just about turning on what JSS already provides; the `jspod install` story (Support git sources in jspod install (jspod install <repo>) #25) needs the upstream init primitive to land before it's smooth.
• Auth ergonomics — git CLI doesn't speak DPoP natively. Push from the CLI today needs `git -c http.extraHeader="Authorization: DPoP "` or a credential helper. Worth a separate doc + maybe a `jspod-git-helper` script.

Test plan once shipped

```bash

From a fresh npx jspod:

git clone http://localhost:5444/public/apps/pilot ./pilot-local

Should clone the bundled Pilot app (assuming it gets git-init'd as part of seed,

or after the upstream init lands)

Then locally:

cd pilot-local
git log

History should match the upstream Pilot repo (once we either bundle as a real

repo or fetch on first start)

```

Cross-references

• jspod#24, jspod#25 — install-apps story (this is the enabling capability)
• JSS#464 — apps-in-pods primitives
• JSS init issue (linked above) — required before `git push` to a fresh path works