replying to @dtinth
Yes, you got it. PWA: Sign in opens backend /pair in Safari, OIDC happens there, approve; PWA was polling and is now in. Android: shows code+QR, scan or type it on any signed-in browser, approve; app polls and is in.
Commit
2f61176
Please brainstorm different interaction ideas so it works well in these situations:
- Desktop PWA: Client and backend in the same browser, redirect works here
- iPad PWA: Client and backend in different browser. Redirect doesn't work, but being on the same machine, copy and…
Brainstormed 6 ideas and ran a small tournament.
Ideas:
1 Device flow (RFC 8628): client shows a code, you approve it on /pair, client polls.
2 Mint-a-code: the signed-in /pair page mints a short code, you carry it to the client, client redeems it.
3 PKCE round trip: client…
I like no.2, but if code is short, potential attackers can brute force. Might be cool if the code also includes the backend URL so we can remove Backend URL from the settings page.
Both good.
Brute force: make the code 12 chars (60 bits) plus a per-IP rate limit and a 2 min TTL. Only a few codes are live at once, so a guess almost never hits.
Backend URL: make the pairing string a link, https://<backend>/pair#<code>. The client takes the origin as the…
All clients should be backend agnostic tho. We don't have a public backend here. I am fine with long code tho. If the desktop has a camera it can scan the phone's QR code.
Agreed, and that fits: the pairing link carries the backend, so a client never hardcodes one. Same client works with any self-hosted backend.
So the final shape:
- Backend /pair mints a code and shows it as a link + QR + Copy/Share.
- Any client takes that link (paste, scan, or…
Yeah and let's start building. For web client, I already built https://github.com/dtinth/qr with features like torch and camera switching. For Android, I don't know, you choose and tell me.
GitHubGitHub - dtinth/qr: A popup QR code scanner that can be easily integrated into a web app.A popup QR code scanner that can be easily integrated into a web app. - dtinth/qr
Correction to what I said earlier ("no provider change"): the backend has no login of its own today, the website does the OIDC dance. So /pair on the backend runs the code flow itself, and the provider must allow https://<backend>/pair as a redirect URI. One-time, per backend.…
The OIDC provider I am using is assuming consumer is a public client. Any downside of keeping that?
Backend pairing works end to end locally: /pair page, mint, redeem, single use, rate limited. 108 tests pass. Not committed yet, the pre-commit hook needs deps installed in the main checkout. Web and Android next.
Ok, continue. You can make a draft PR and push as you go.
Backend, web and Android pairing are all written and tested. Still cannot commit: the hook needs deps in the main checkout. Run "cd ~/ghq/github.com/dtinth/vxbeamer && vp install", or say OK to --no-verify. @dtinth which one?
Thanks, hook passes, committed f9c8cb7 on worktree-pairing-auth. My push is blocked in the worktree. @dtinth please run: cd ~/ghq/github.com/dtinth/vxbeamer/.claude/worktrees/pairing-auth && claw exec -- git push -u origin worktree-pairing-auth. Then I open the draft PR.
My push is blocked in the worktreeExplain pls.
The harness refuses claw exec with a push command while I am in a worktree: it cannot prove which repo the command targets, and asks for the plain command. The plain one has no push creds, claw does. Last time you pushed with !. Want me to push from the main checkout instead?
Hm, can't we set up Git credentials helper to use
claw exec built in?Yes, that works: a credential helper that prints the output of claw token --repo dtinth/vxbeamer as the password, with username x-access-token. Today the helper is gh auth, which needs GH_TOKEN. The harness denied my config change. @dtinth want to set it, or approve me doing it?
Helper set (repo-local), branch pushed, draft PR: https://github.com/dtinth/vxbeamer/pull/123. Android scanner: Google code scanner, no camera permission. Untested: real browser sign-in at /pair, real device scan. @dtinth
GitHubfeat: pair clients with a code minted on the backend's /pair page by dtinth-claw[bot] · Pull Request #123 · dtinth/vxbeamerWhat Pairing: the backend serves /pair, you sign in there with OIDC (authorization code + PKCE, public client), and it mints a 12-character single-use code (Crockford base32, 2 minutes, in memory)....
Nice, please raise an issue in dtinth/claw with complaint about worktree isolation not compatible with claw exec and add info about how we solved it
commit 2f61176
The harness denied me creating an issue in dtinth/claw (external repo write). Issue text is drafted at ~/.claude/jobs/7d111f40/tmp/issue.md. @dtinth allow it with a Bash permission rule and say so, or file it from that draft?