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Flake update with fork merge — create merge commit, run flake-lock-merge, advance main. Use when updating flake inputs in a repo with both a public (kdn) and private (fork) remote.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Manage .flake.patches — find fixes for build failures, check if patches landed in nixos-unstable, register or remove patches. Use when a nix build fails after a flake update.
Update flake.lock, handle patches, and test builds. Use when asked to update the flake, run nix run .#update, handle patch failures, or test darwin/nixos builds after an update.
jj version control patterns — working copy, split/squash, bookmarks, fork rebase. Single source of truth for jj usage in this repo; use whenever reaching for a raw git command, or when working with jj commits, splits, rebases, or bookmark management.
| name | flake-update-fork |
| description | Flake update with fork merge — create merge commit, run flake-lock-merge, advance main. Use when updating flake inputs in a repo with both a public (kdn) and private (fork) remote. |
| type | Skill |
| timestamp | "2026-07-10T10:19:48.000Z" |
Full reference: docs/flake-update.fork.md
Base workflow: see flake-update skill.
# @ is the empty working copy on top of main and upstream
nix run '.#update'
# patch failed? remove from .flake.patches/config.toml + delete .patch file, then:
# nix run '.#update' -- g:patches
jj describe -m 'chore(flake): update'
FORK_UPDATE=$(jj log -r @ --no-graph -T 'change_id.short()')
# split non-flake.lock changes onto upstream; flake.lock stays in the fork update:
jj split -r "$FORK_UPDATE" --insert-after upstream -m 'chore(flake): update' -- .flake.patches/
# @ is now the upstream-side commit
# merge in public flake inputs from the fork update:
PRE_UPDATE_REV=$(jj log -r 'upstream@<fork-remote>' --no-graph -T 'commit_id')
nix run "git+file://$PWD?rev=${PRE_UPDATE_REV}#flake-lock-merge" -- "$FORK_UPDATE"
jj bookmark set upstream -r @
# go to the fork update (flake.lock only) and create the merge commit:
jj edit "$FORK_UPDATE"
jj new -m 'chore(flake): upgrade & upstream merge'
jj bookmark set main -r @
jj new -d main -d upstream
jj split -m 'fix(...): description' -- <changed-files>
jj bookmark set upstream -r 'upstream-tip'
jj rebase -r "$FORK_UPDATE" -d upstream
jj rebase --revision <merge-change-id> \
--destination "$FORK_UPDATE" \
--destination main@<fork-remote>
jj bookmark set main -r <merge-change-id>
jj rebase -s @ -d main -d upstream
upstream@<fork-remote> is the stable anchor — never use bare upstream in revsetsjj split --insert-after upstream inserts the selected files as a new commit after upstream and rebases $FORK_UPDATE (and any other children) onto it automatically; flake.lock stays in $FORK_UPDATEflake-lock-merge "$FORK_UPDATE" reads the fork update's lock as reference to populate only public inputs into the upstream-only commitflake.lock changes (.flake.patches/) go on the upstream chain; only flake.lock stays in the fork updatejj new and jj rebase are non-interactive; jj edit switches working copy non-interactivelyjj split, @ lands on the new upstream-side commit — no need to jj edit itnix run "git+file://$PWD?rev=${PRE_UPDATE_REV}#darwin-rebuild" -- buildswitch — hand off to user (requires sudo)