This PR introduces a unified `WorktreeSandbox` type in `fabro-sandbox`
that consolidates previously duplicated git worktree management logic
spread across `parallel.rs` and `run.rs`. The new type wraps any
`Arc<dyn Sandbox>`, handles the full worktree lifecycle (branch
creation, `worktree add`, and cleanup) in its `initialize()`/`cleanup()`
methods, overrides `working_directory()` and `exec_command()` to default
to the worktree path, and delegates all other `Sandbox` methods to the
inner sandbox. A `WorktreeConfig` struct controls behavior (branch name,
base SHA, worktree path, and a `skip_branch_creation` flag for resume
flows), and a `WorktreeEventCallback` mechanism bridges lifecycle events
to the workflow event system via a new
`EventEmitter::worktree_callback()` helper.
The old private `WorktreeSandbox` struct in `parallel.rs` (which only
redirected `exec_command` working dirs with no lifecycle awareness) is
removed and replaced with the shared implementation. The
`setup_worktree()` function in `run.rs` is also removed; its logic is
absorbed directly into the `SandboxProvider::Local` branch of sandbox
construction, where `WorktreeSandbox::initialize()` is called and
`std::env::set_current_dir()` follows on success. The resume path
(`run_from_branch`) similarly replaces direct `git::replace_worktree`
calls with `WorktreeSandbox` using `skip_branch_creation: true`. The
`MockSandbox` in `test_support.rs` gains `captured_commands` and
`captured_working_dirs` vectors to support sequenced-command assertions
in the new unit tests.
The `MockSandbox` enhancement is a notable improvement for testability
beyond this specific change—having the full ordered sequence of commands
rather than just the last one makes it straightforward to assert on
multi-step git workflows. One subtle behavior worth noting is that in
`parallel.rs` the `git reset --hard` step previously present after
worktree creation is now absent from `WorktreeSandbox::initialize()`;
the plan mentioned it but the implementation deliberately omits it (the
branch is already force-set to the target SHA, so the reset was
redundant for the parallel case). Cleanup for parallel branches
continues to go through `engine::git_remove_worktree` on the parent
sandbox rather than calling `wt_sandbox.cleanup()`, since the sandbox
`Arc` is consumed by the spawned task—this is a reasonable tradeoff
noted in the plan.
### Fabro Details
<details>
<summary>Ran 11 stages in 62m 32s for $3.67</summary>
| Stage | Duration | Cost | Retries |
|---|---|---|---|
| start | 0s | – | 0 |
| toolchain | 0s | – | 0 |
| preflight_compile | 1m 11s | – | 0 |
| preflight_lint | 12s | – | 0 |
| implement | 30m 15s | $2.15 | 0 |
| simplify_opus | 15m 5s | $0.71 | 0 |
| simplify_gpt | 11m 8s | $0.54 | 0 |
| verify | 46s | – | 0 |
| fixup | 3m 17s | $0.27 | 0 |
| verify | 46s | – | 0 |
| fmt | 1s | – | 0 |
| **Total** | **62m 32s** | **$3.67** | **0** |
</details>
<details>
<summary>Ran <code>ImplementAndSimplify.fabro</code> (12 nodes and 15
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 -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>
MDX treats {…} as JSX expressions. Bare curly braces in headings
and bold text caused acorn parse failures during Mintlify deploy.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add March 17 changelog entry (OpenAI Codex backend, fabro docs/discord
commands, gpt-5.4-mini). Update March 16 entry with OAuth error fix.
Add gpt-5.4-mini to model catalog docs and fabro docs/discord to CLI
reference.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Route OpenAI OAuth users through the ChatGPT Codex backend API with
required headers (ChatGPT-Account-Id, originator). The Codex endpoint
requires streaming-only requests, omits unsupported fields (temperature,
max_output_tokens, top_p), and uses a different error format. Also
persists the account ID from OAuth tokens and updates CLI docs for
`fabro ps -q`.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Roadmap: replace placeholder items with current shipped/building/planned
features. Use real dates for sorting instead of manual sortOrder. Fix
UTC timezone rendering for date display.
Terminology: replace all standalone "DOT" references with "Graphviz" or
"Graphviz DOT" across docs, marketing, README, AGENTS.md, and OpenAPI
spec. Changelogs left unchanged as historical records.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Tool names are shell/read_file/write_file/edit_file/glob/grep/web_fetch/web_search, not Bash/Read/Write/Edit etc.
- AnthropicProfile::new takes only model, not (model, config)
- Add missing web_search to tool list
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Restructure the SDK reference page to cover both crates. The page now
opens with an overview of Fabro's two Rust SDK entry points, followed
by full fabro-agent documentation (Session, SessionConfig, Sandbox,
provider profiles, events, tool hooks, error handling) and the existing
fabro-llm reference.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Move Comparison link below Troubleshooting in nav
- Rename "DOT Language" page to "Fabro Language"
- Remove five-tier table from dark factory page, keep link to Dan Shapiro's post
- Add fork command docs and checkpoints section
- Add upgrade, asset list, asset cp command docs
- Add upgrade_check config reference
- Add retros feature flag to server config
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Merge core-concepts/server-mode into administration/deploy-server
- Move Comparison from Getting Started to Reference
- Move Dark Factory from Getting Started to Core Concepts
- Update all internal links to server-mode
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Fix changelog rewind syntax to use positional args instead of flags.
Clarify Daytona snapshot note to distinguish configured-but-missing vs
unconfigured cases. Add rewind/workflow-list CLI reference sections,
checkpoints rewind guide, thread_id validation rule, and human gate
behavior details.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Complete the rebrand by replacing hardcoded "arc/run/" branch prefixes
with a RUN_BRANCH_PREFIX constant ("fabro/run/") and updating
fabro init to create workflows under fabro/workflows/ instead of
arc/workflows/.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Update 47 MDX doc pages, OpenAPI spec, SVG diagram, language
grammar, frontend demo data, marketing page, skills, and README
to use .fabro extension. Add "fabro" to fileTypes in language
grammars. Document stack.child_workflow alongside stack.child_dotfile.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Note in stylesheets, DOT reference, multi-model tutorial, run config,
and skill references that provider is now optional and auto-inferred.
Remove redundant provider from TOML examples.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Rename `llm_model` → `model` and `llm_provider` → `provider` in stylesheet
properties, accessor methods, and all DOT/doc references. Add
ProviderInferenceTransform that automatically infers provider from the model
catalog, eliminating redundant provider declarations in stylesheets.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Consolidates server-mode documentation into a single page with
standalone vs. server comparison table, setup guide, and cross-references.
Updates how-arc-works, quick-start, and architecture pages to link to
the new canonical page instead of duplicating the comparison table.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Regenerate 2026-03-10 changelog with full commit set (installer, devcontainer
support, arc pr subcommands, --no-dotenv removal). Add 2026-03-11 changelog
for shadow branch run records and arc diff improvements. Update docs: CLI
reference (arc pr list/view/merge/close, --shortstat), devcontainers page
(replace placeholder with full content), run-configuration (devcontainer
field), checkpoints (per-node files on metadata branch), models catalog
(gemini-3.1-pro-preview-customtools). Improve preflight to show per-model
LLM checks instead of a single merged provider line.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The local .env loading was unnecessary since arc install writes all
config to ~/.arc/.env. Simplifies dotenv behavior to unconditionally
load from the home directory only.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The one-time environment setup command (LLMs, certs, GitHub) is now
`arc install`, freeing up naming space for a future `arc init` command
for per-project initialization.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Per-run data now lives in ~/.arc/runs/ while daily CLI log files
stay in ~/.arc/logs/. Renames: logs_root → run_dir (RunConfig field,
Handler trait param, all handlers), logs_dir → run_dir (CLI arg,
local variables), default_logs_base → default_runs_base (path fn).
Adds DB migration 002 to rename workflow_runs.logs_dir → run_dir.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- docs/agents/mcp.mdx: Remove pre-release warning. Add sandbox transport
docs alongside stdio and HTTP. Restructure configuration section to
cover both cli.toml and run config TOML. Replace filesystem example
with Playwright browser automation example.
- docs/execution/run-configuration.mdx: Add [mcp_servers] section with
field reference for all three transport types. Add to full example.
- docs/reference/cli-configuration.mdx: Add sandbox transport subsection.
Cross-reference workflow-level MCP config.
- docs/integrations/daytona.mdx: Add MCP sandbox transport to feature table.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Embeds the ULID run_id directly in the directory name so logs dirs
can be easily correlated with runs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- hooks.mdx: add pre_tool_use/post_tool_use/post_tool_use_failure events,
tool-specific context fields, matcher support for tool names
- cli.mdx: add --mode and --server-url flags to arc exec
- run-configuration.mdx: add [pull_request] section
- github.mdx: add auto-PR to features table
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Regenerate March 7 changelog with sandbox.env, CLI renames, and missing
accordion items. Add March 8 changelog for sandbox reliability and @file
validation. Update reference docs for --goal, --mode flags, sandbox.env,
checkpoint exclude globs, [log] config, [git.author], and project_memory.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Every TOML example now shows which config file it belongs to
(server.toml, cli.toml, or run.toml) via Mintlify's title annotation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
