mirror of
https://github.com/fabro-sh/fabro.git
synced 2026-09-16 23:43:10 +00:00
d6f1bce7ef
This PR adds a new `fabro fork` subcommand that creates a new run
branching from an existing run at a specific checkpoint, without
modifying the original run. This is a non-destructive alternative to
`fabro rewind` — instead of moving branch refs backward and losing later
checkpoint history, fork preserves the source run entirely and creates
fresh run and metadata branches for the new run.
The implementation heavily reuses existing infrastructure from
`rewind.rs` (timeline building, target resolution, parallel map loading,
prefix-based run ID lookup) and follows the same CLI patterns. The core
`execute_fork` function generates a new ULID, creates a run branch ref
pointing at the target checkpoint's commit, then builds a new metadata
branch containing an updated manifest (with new run ID and branch name),
the original graph, and the checkpoint state from the target commit. It
supports the same target syntax as rewind (`@N`, `node_name`,
`node_name@N`), defaults to the latest checkpoint when no target is
specified, and optionally pushes new branches to the remote.
The PR also makes `load_parallel_map` public in `rewind.rs` so fork can
reuse it, and includes five tests covering run branch creation, metadata
branch correctness, preservation of the original run, default-to-latest
behavior, and forking at a specific ordinal.
### Fabro Details
<details>
<summary>Ran 7 stages in 15m 15s for $4.39</summary>
| Stage | Duration | Cost | Retries |
|---|---|---|---|
| start | 0s | – | 0 |
| toolchain | 0s | – | 0 |
| preflight_compile | 0s | – | 0 |
| preflight_lint | 0s | – | 0 |
| implement | 0s | $1.94 | 0 |
| simplify | 0s | $2.44 | 0 |
| verify | 0s | – | 0 |
| **Total** | **15m 15s** | **$4.39** | **0** |
</details>
<details>
<summary>Ran <code>ImplementAndSimplify.fabro</code> (10 nodes and 13
edges)</summary>
```dot
digraph ImplementAndSimplify {
graph [
goal="Implement and simplify",
model_stylesheet="
* { backend: api; model: claude-opus-4-6;}
"
]
rankdir=LR
start [shape=Mdiamond, label="Start"]
exit [shape=Msquare, label="Exit"]
toolchain [label="Toolchain", shape=parallelogram, script="command -v cargo >/dev/null || { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y && sudo ln -sf $HOME/.cargo/bin/* /usr/local/bin/; }; cargo --version 2>&1", max_retries=0]
preflight_compile [label="Preflight Compile", shape=parallelogram, script="cargo check 2>&1", max_retries=0]
preflight_lint [label="Preflight Lint", shape=parallelogram, script="cargo clippy -- -D warnings 2>&1", max_retries=0]
fix_lints [label="Fix Lints", prompt="The preflight lint step failed. Read the build output from context and fix all clippy lint warnings.", max_visits=3]
implement [label="Implement", prompt="Read the plan file referenced in the goal and implement every step. Make all the code changes described in the plan."]
simplify [label="Simplify", prompt="@prompts/simplify.md"]
verify [label="Verify", shape=parallelogram, script="cargo clippy -- -D warnings 2>&1 && cargo test 2>&1", goal_gate=true, retry_target="fixup"]
fixup [label="Fixup", prompt="The verify step failed. Read the build output from context and fix all clippy lint warnings and test failures.", max_visits=3]
start -> toolchain
toolchain -> preflight_compile [condition="outcome=success"]
toolchain -> exit
preflight_compile -> preflight_lint [condition="outcome=success"]
preflight_compile -> exit
preflight_lint -> implement [condition="outcome=success"]
preflight_lint -> fix_lints
fix_lints -> preflight_lint
implement -> simplify -> verify
verify -> exit [condition="outcome=success"]
verify -> fixup
fixup -> verify
}
```
</details>
⚒️ Generated with [Fabro](https://fabro.sh)
---------
Co-authored-by: Fabro <noreply@fabro.sh>
Co-authored-by: Bryan Helmkamp <bryan@brynary.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
|
||
|---|---|---|
| .. | ||
| src | ||
| tests | ||
| build.rs | ||
| Cargo.toml | ||