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Recent Skeets
I wanted to always have up to date hash of contents of the directory after any change to use as a cache key. Started to list files, hashing them only to realize jj is already constantly doing that 😬
$ jj log --limit 1 -r "ancestors(@)" -T "self.commit_id()" --no-graph src/ # git hash $ jj log --limit 1 -r "ancestors(@)" -T "self.commit_id().short()" --no-graph src/ # short hashThinkPad X13 Gen 4 with AMD 7840U
My X390 bricked a few years ago after I lost power during a BIOS update, without warranty, and I needed some kind of usable on-the-go backup laptop.
In December, Lenovo DE had 30-40% discounts on some of the models, and the X13 Gen 4 AMD looked VERY interesting! Given uncertainty about RAM, SSD, and what else prices, I decided to get it. Compared to Framework 13" which is more expensive now.
After getting it, I had mixed feelings: 100% worse screen than my work MBP, okayish keyboard but it’s small and light! So my criteria would be to keep it as long as it wouldn’t run SIGNIFICANTLY slower than my PC that needs ~160W idling. I didn’t have any ready to go Elixir project to stress the CPU/MEM so I used “jj”. I compile it every 1st Wednesday of the month when the new release drops! Oh, and apparently, run all tests too, because it’s installed via Nix flake.
The setup:
- PC
- AMD Ryzen 9 5950X (16 cores)
- 32GB DDR4 3200MHz
- MBP M1
- 8 Core CPU (6P+2E)
- 32GB
- ThinkPad X13 Gen 4
- 7840U 8 Cores
- 32GB LPDDR5x-6400
All in “power” mode, with connected power cable.
A simple benchmark, with empty “target” directory in “jj” repository
MBP M1 ThinkPad X13 Gen 4
7840UPC
5950Xcargo build 51s 48s 35s cargo test 360s 193s 124s I’m sure the M4 10 Core in MacBook Air would be faster than any of them, and no active cooling too, but then for 32GB RAM, 1 SSD and 3y warranty it wouldn’t cost 1000€, but 2100€.
- PC
One of my most used commands gets better and better -
jj prpr.When using “jj”, I’m on the squash/changes as TODO workflow:
- Always work on new change
- Squash into previous “described” change via
jj sq, or better:jj absorb
This handles the local part, what about the PRs? I don’t want to repeat my commits in GitHub PR description. It’s already in my commits! This was how
prprwas born.- Make changes (per above workflow)
jj prpr
first change on top of
trunk()?- Prompt for interactive commit in jj. Title of the commit will be the title of PR
Confirm/skip AI code review for quick sanity check
Push bookmarks in the stack
No PR? Create PR via gh CLI
- Automatically target previous bookmark for stack PRs
- Create description out of commits on given PR
- Snapshot description into local filesystem
PR exists?
- Diff description with snapshot, show diff, ask for resolution
Link to draft PR is now in clipboard. PR description is created out of commit messages.
There’s a lot of asterisks here and little QoL fixes like handling multiple changes, stacking PRs and more. I freaking love it. At some point hopefully
jj syncwill be there and it will get even better.I asked Claude to describe the full flow in ASCII:
desc- description of the PR┌─────────────────────────────────────────┐ │ jj prpr │ └────────────────┬────────────────────────┘ │ ┌────────┴────────┐ ▼ ▼ ┌─────────┐ ┌─────────┐ │ desc │ │ prpr │ │ command │ │ command │ └────┬────┘ └────┬────┘ │ │ ▼ ▼ Show title & ┌──────────────┐ description │ Get Title │ │ │ (1st line) │ ▼ └──────┬───────┘ EXIT │ ▼ ┌────────────────┐ │ Title exists? │ └───────┬────────┘ NO │ YES ┌──────────┴──────────┐ ▼ │ ┌─────────────────┐ │ │ Working changes │ │ │ exist? │ │ └────────┬────────┘ │ YES │ NO │ ┌──────┴──────┐ │ ▼ ▼ │ ┌─────────┐ ┌─────────┐ │ │ Commit │ │ EXIT │ │ └────┬────┘ └─────────┘ │ │ │ └────────────────────────────┤ ▼ ┌──────────────────┐ │ Bookmark exists? │ └────────┬─────────┘ NO │ YES ┌────────┴────────┐ ▼ │ ┌─────────────────┐ │ │ Create bookmark │ │ │ + git push │ │ └────────┬────────┘ │ │ │ ▼ │ ┌─────────────────┐ │ │ AI Code review? │ │ │ (optional) │ │ └────────┬────────┘ │ └────────┬────────┘ ▼ ┌──────────────────┐ │ Find PR for │ │ bookmark │ └────────┬─────────┘ NO │ YES ┌────────┴────────┐ ▼ ▼ ┌─────────────────┐ ┌─────────────────┐ │ CREATE PR │ │ Compare local │ │ (draft/ready) │ │ vs remote desc │ │ │ └────────┬────────┘ │ gh pr create │ │ │ │ ┌─────┴─────┐ └────────┬────────┘ ▼ ▼ │ ┌──────────┐ ┌──────────┐ │ │ Checksums│ │ Checksums│ │ │ DIFFER │ │ MATCH │ │ └────┬─────┘ └────┬─────┘ │ ▼ │ │ ┌─────────────┐ │ │ │ Show diff │ │ │ └──────┬──────┘ │ │ ▼ │ │ ┌─────────────┐ │ │ │ Overwrite? │ │ │ └──────┬──────┘ │ │ YES │ NO │ │ ┌──────┴──────┐ │ │ ▼ ▼ │ │ Update Skip & │ │ PR desc EXIT │ │ │ │ └────┴──────────┬──────────┘ ▼ ┌──────────────────┐ │ Update PR desc │ │ (if changed) │ └────────┬─────────┘ ▼ ┌──────────────────┐ │ jj git push │ │ -b bookmark │ └────────┬─────────┘ ▼ ┌──────────────────┐ │ Save checksum │ │ to local state │ └────────┬─────────┘ ▼ ┌──────────────────┐ │ Copy new PR URL │ │ to clipboard │ └──────────────────┘Just sharing it out there, little QoL commands that are fun and easy. I had the initial version working in bash in ~2024 but in 2025 I let Claude rewrite it in fish-shell, and add all the little improvements that really made it enjoyable.