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ac355d58c7
This PR extracts the `fabro resume` subcommand from `fabro run`,
replacing the `--resume` and `--run-branch` flags with a dedicated, more
ergonomic interface. Users can now run `fabro resume <RUN_ID>` instead
of constructing `fabro run --run-branch fabro/run/<RUN_ID>` manually,
and the command also accepts run ID prefixes (matching the pattern
established by `fabro rewind` and `fabro fork`). Checkpoint-file-based
resumption is also supported via `fabro resume --checkpoint
path/to/checkpoint.json --workflow workflow.fabro`.
The implementation moves the ~315-line `run_from_branch()` function out
of `run.rs` and into a new `commands/resume.rs` module, splitting it
into two preparation paths (`prepare_from_checkpoint` and
`prepare_from_branch`) that converge on a shared `run_resumed()` tail.
Several previously private helpers in `run.rs` are widened to
`pub(crate)` to allow sharing: `local_sandbox_with_callback`,
`resolve_ssh_config`, `resolve_ssh_clone_params`,
`resolve_preserve_sandbox`, `generate_retro`, `write_finalize_commit`,
`print_final_output`, `print_assets`, and the new `default_run_dir`
helper extracted from duplicated inline logic. The `RunArgs` struct
loses its `resume` and `run_branch` fields along with their
`conflicts_with` annotations, and `RunSpec` drops the corresponding
fields with `#[serde(default)]` for backward compatibility.
Documentation across `docs/reference/cli.mdx`,
`docs/execution/checkpoints.mdx`, and
`docs/core-concepts/how-fabro-works.mdx` is updated to reflect the new
interface, and the `rewind`/`fork` commands now hint `fabro resume
<short-prefix>` instead of the full branch name.
### Fabro Details
<details>
<summary>Ran 9 stages in 30m 25s for $6.70</summary>
| Stage | Duration | Cost | Retries |
|---|---|---|---|
| start | 0s | – | 0 |
| toolchain | 0s | – | 0 |
| preflight_compile | 1m 10s | – | 0 |
| preflight_lint | 13s | – | 0 |
| implement | 18m 30s | $3.95 | 0 |
| simplify_opus | 9m 38s | $2.75 | 0 |
| simplify_gpt | 0s | – | 0 |
| verify | 19s | – | 0 |
| fmt | 1s | – | 0 |
| **Total** | **30m 25s** | **$6.70** | **0** |
</details>
<details>
<summary>Ran <code>ImplementPlan.fabro</code> (12 nodes and 15
edges)</summary>
```dot
digraph ImplementPlan {
graph [
goal="Implement and simplify",
model_stylesheet="
* { 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 -q --workspace 2>&1", max_retries=0]
preflight_lint [label="Preflight Lint", shape=parallelogram, script="cargo clippy -q --workspace -- -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. Use red/green TDD."]
simplify_opus [label="Simplify (Opus)", prompt="@prompts/simplify.md"]
simplify_gpt [label="Simplify (GPT-54)", prompt="@prompts/simplify.md", model="gpt-54"]
verify [label="Verify", shape=parallelogram, script="cargo clippy -q --workspace -- -D warnings 2>&1 && cargo nextest run --cargo-quiet --workspace --status-level fail 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]
fmt [label="Format", shape=parallelogram, script="cargo fmt --all 2>&1", max_retries=0]
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_opus -> simplify_gpt -> verify
verify -> fmt [condition="outcome=success"]
verify -> fixup
fixup -> verify
fmt -> exit
}
```
</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>
64 lines
2.3 KiB
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64 lines
2.3 KiB
Text
---
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title: "SSH Access"
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description: "Connect to sandbox environments via SSH for direct inspection and debugging"
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---
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When a workflow runs in a [Daytona sandbox](/execution/environments#daytona), you can SSH into the sandbox to inspect files, run commands, and debug issues — all while the workflow is still executing.
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<Note>
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SSH access is only available with the Daytona sandbox provider. Local, Docker, and exe.dev sandboxes do not support SSH access.
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</Note>
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## Connecting to a run's sandbox
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Use `fabro ssh` to connect to the Daytona sandbox from any completed or in-progress run:
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```bash
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fabro ssh <run-id>
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```
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Fabro creates temporary SSH credentials and connects directly. Use `--print` to print the SSH command instead of connecting, or `--ttl` to set the credential expiry:
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```bash
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fabro ssh <run-id> --print
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fabro ssh <run-id> --ttl 120
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```
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## Keeping the sandbox alive
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By default, Daytona sandboxes are destroyed when the workflow finishes. To keep the sandbox running after the workflow completes — so you can continue debugging — pass `--preserve-sandbox`:
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```bash
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fabro run workflow.fabro --sandbox daytona --preserve-sandbox
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```
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Without `--preserve-sandbox`, the SSH session is terminated when the run ends and the sandbox is cleaned up.
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You can also set `auto_stop_interval` in your run config to control how long an idle sandbox stays alive:
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```toml title="run.toml"
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[sandbox]
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provider = "daytona"
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preserve = true
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[sandbox.daytona]
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auto_stop_interval = 60
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```
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## What you can do over SSH
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Once connected, you have a full shell inside the sandbox VM:
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- **Inspect the working directory** — Agent file changes are at `/home/daytona/workspace`
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- **Run commands** — Execute tests, check logs, inspect process state
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- **Edit files** — Make manual fixes while the workflow is paused at a human gate
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- **Debug failures** — Reproduce and diagnose issues in the exact environment where they occurred
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## Credential lifetime
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SSH credentials are temporary and expire after **60 minutes** by default. With `fabro ssh`, you can set a custom TTL with `--ttl <MINUTES>`. If your session expires, run `fabro ssh` again to get fresh credentials.
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## Limitations
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- SSH access is **Daytona-only**.
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- SSH access is currently available only from the **CLI**. The API server and web UI do not yet expose an SSH endpoint.
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