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fabro/docs/reference/cli.mdx
Bryan Helmkamp 21aff5431c Update docs, frontend, marketing, and skills for .fabro extension 
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>
2026-03-13 22:38:25 -04:00

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---
title: "CLI Reference"
description: "Fabro command-line interface reference"
---
## Global options
These flags apply to all subcommands:
| Flag | Description |
|---|---|
| `--debug` | Enable DEBUG-level logging (default is INFO) |
| `-h, --help` | Print help |
| `-V, --version` | Print version |
Fabro loads environment variables from `~/.fabro/.env`.
## Configuration
CLI defaults can be set in `~/.fabro/cli.toml` so you don't have to pass common flags every time:
```toml title="cli.toml"
[exec]
provider = "anthropic"
model = "claude-opus-4-6"
permissions = "read-write"
output_format = "text"
[llm]
model = "claude-sonnet-4-5"
```
CLI flags always override `cli.toml` values, which override hardcoded defaults.
---
## `fabro run`
Launch a workflow from a `.fabro` workflow file or `.toml` task config.
```bash
fabro run <WORKFLOW>
fabro run run.toml
fabro run --run-branch arc/run/abc123
```
| Argument / Flag | Description |
|---|---|
| `<WORKFLOW>` | Path to a `.fabro` workflow file or `.toml` task config. Not required when using `--run-branch`. |
| `--run-dir <DIR>` | Run output directory |
| `--dry-run` | Execute with a simulated LLM backend |
| `--preflight` | Validate run configuration without executing |
| `--auto-approve` | Auto-approve all human gates |
| `--resume <FILE>` | Resume from a checkpoint file |
| `--run-branch <BRANCH>` | Resume from a git run branch (reads checkpoint and graph from metadata branch) |
| `--model <MODEL>` | Override default LLM model |
| `--provider <PROVIDER>` | Override default LLM provider |
| `-v, --verbose` | Enable verbose output |
| `--sandbox <SANDBOX>` | Sandbox for agent tools: `local`, `docker`, `daytona`, `ssh`, or `exe` |
| `--label <KEY=VALUE>` | Attach a label to this run (repeatable) |
| `--goal <GOAL>` | Override the workflow goal (exposed as `$goal` in prompts) |
| `--goal-file <FILE>` | Read the goal from a file instead of inline text |
| `--no-retro` | Skip retro generation after the run |
| `--ssh` | Create SSH access to the sandbox (Daytona or exe.dev) and print the connection command |
| `--preserve-sandbox` | Keep the sandbox alive after the run finishes (for debugging) |
<Note>
`--preflight` conflicts with `--resume`, `--run-branch`, and `--dry-run`. `--run-branch` conflicts with `--resume`.
</Note>
## `fabro ps`
List workflow runs stored in `~/.fabro/runs`.
```bash
fabro ps
fabro ps --workflow deploy --label env=prod
fabro ps --json
```
| Flag | Description |
|---|---|
| `--before <DATE>` | Only show runs started before this date (YYYY-MM-DD prefix match) |
| `--workflow <NAME>` | Filter by workflow name (substring match) |
| `--label <KEY=VALUE>` | Filter by label (repeatable, AND semantics) |
| `--orphans` | Include orphan directories (no `manifest.json`) |
| `--json` | Output as JSON |
## `fabro system prune`
Delete old workflow runs. Dry-run by default — pass `--yes` to actually delete.
```bash
fabro system prune --before 2026-01-01
fabro system prune --before 2026-01-01 --yes
fabro system prune --orphans --yes
```
| Flag | Description |
|---|---|
| `--before <DATE>` | Only prune runs started before this date (YYYY-MM-DD prefix match) |
| `--workflow <NAME>` | Filter by workflow name (substring match) |
| `--label <KEY=VALUE>` | Filter by label (repeatable, AND semantics) |
| `--orphans` | Include orphan directories (no `manifest.json`) |
| `--yes` | Actually delete (default is dry-run) |
---
## `fabro exec`
Run an agentic coding session. The agent operates in the current directory using file, search, and shell tools.
```bash
fabro exec "Add input validation to the signup form"
fabro exec "Fix the failing test" --provider openai --model gpt-5.2-codex
fabro exec "Refactor the auth module" --permissions full --auto-approve
```
| Argument / Flag | Description | Default |
|---|---|---|
| `<PROMPT>` | Task prompt (required) | — |
| `--provider <PROVIDER>` | LLM provider | `anthropic` |
| `--model <MODEL>` | Model name | Per provider (see below) |
| `--permissions <LEVEL>` | Permission level: `read-only`, `read-write`, or `full` | `read-write` |
| `--auto-approve` | Skip interactive prompts; deny tools outside permission level | — |
| `--debug` | Print LLM request/response debug info to stderr | — |
| `--verbose` | Print full LLM request/response JSON to stderr | — |
| `--skills-dir <DIR>` | Directory containing skill files (overrides default discovery) | — |
| `--output-format <FORMAT>` | Output format: `text` (human-readable) or `json` (NDJSON event stream) | `text` |
| `--mode <MODE>` | `standalone` (default) or `server` — in server mode, routes through the Fabro API's `/completions` endpoint | `standalone` |
| `--server-url <URL>` | Fabro API server URL (overrides `server.base_url` from `cli.toml`) | — |
Permission levels control which tools are auto-approved: `read-only` allows read tools (`read_file`, `grep`, `glob`, `list_dir`) and subagent tools; `read-write` adds write tools (`write_file`, `edit_file`, `apply_patch`); `full` allows all tools including shell commands. Tools outside the permission level are either interactively prompted (if a TTY is present) or denied (with `--auto-approve`). See [default models by provider](/core-concepts/models#default-models).
---
## `fabro llm prompt`
Send a one-shot prompt to an LLM. Accepts a prompt as an argument, via stdin, or both (stdin is prepended).
```bash
fabro llm prompt "Explain quicksort in one paragraph"
echo "Summarize this:" | fabro llm prompt
fabro llm prompt "Translate to French" -m claude-sonnet-4-5 -o temperature=0.3
fabro llm prompt -S '{"type":"object","properties":{"name":{"type":"string"}}}' "Extract the name from: John Smith"
```
| Argument / Flag | Description |
|---|---|
| `[PROMPT]` | The prompt text (also accepts stdin) |
| `-m, --model <MODEL>` | Model to use |
| `-s, --system <SYSTEM>` | System prompt |
| `--no-stream` | Do not stream output |
| `-u, --usage` | Show token usage |
| `-S, --schema <SCHEMA>` | JSON schema for structured output (inline JSON string) |
| `-o, --option <KEY=VALUE>` | Generation options: `temperature`, `max_tokens`, `top_p`, or provider-specific keys |
## `fabro llm chat`
Start an interactive multi-turn chat session. In server mode, the session is backed by the Fabro server's session endpoints.
```bash
fabro llm chat
fabro llm chat -m claude-opus-4-6 -s "You are a helpful coding assistant"
fabro llm chat --mode server
```
| Flag | Description |
|---|---|
| `-m, --model <MODEL>` | Model to use |
| `-s, --system <SYSTEM>` | System prompt |
| `--mode <MODE>` | `standalone` (default) or `server` — in server mode, routes through the Fabro API |
---
## `fabro model list`
List available LLM models from the built-in catalog. Running `fabro model` with no subcommand also lists models.
```bash
fabro model list
fabro model list -p anthropic
fabro model list -q sonnet
fabro model list --mode server
```
| Flag | Description |
|---|---|
| `-p, --provider <PROVIDER>` | Filter by provider |
| `-q, --query <QUERY>` | Search for models matching this string (checks ID, display name, and aliases) |
| `--mode <MODE>` | `standalone` (default) or `server` — in server mode, fetches the catalog from the Fabro API |
## `fabro model test`
Test model availability by sending a simple prompt to each model and reporting the result.
```bash
fabro model test
fabro model test -p anthropic
fabro model test -m claude-sonnet-4-5
```
| Flag | Description |
|---|---|
| `-p, --provider <PROVIDER>` | Filter by provider |
| `-m, --model <MODEL>` | Test a specific model |
---
## `fabro serve`
Start the HTTP API server that exposes the [REST API](/api-reference) for launching and managing workflow runs.
```bash
fabro serve
fabro serve --port 8080 --host 0.0.0.0
fabro serve --sandbox daytona --max-concurrent-runs 4
```
| Flag | Description | Default |
|---|---|---|
| `--port <PORT>` | Port to listen on | `3000` |
| `--host <HOST>` | Host address to bind to | `127.0.0.1` |
| `--model <MODEL>` | Override default LLM model | — |
| `--provider <PROVIDER>` | Override default LLM provider | — |
| `--dry-run` | Execute with simulated LLM backend | — |
| `--sandbox <SANDBOX>` | Sandbox for agent tools: `local`, `docker`, `daytona`, `ssh`, or `exe` | — |
| `--max-concurrent-runs <N>` | Maximum number of concurrent run executions | — |
| `--config <PATH>` | Path to server config file | `~/.fabro/server.toml` |
Demo mode is per-request: send the `X-Fabro-Demo: 1` header to get static demo data with auth disabled.
If no LLM provider API keys are configured, the server automatically falls back to dry-run mode.
---
## `fabro cp`
Copy files between a run's sandbox and the local filesystem. The run must have a persisted sandbox record (Daytona, exe.dev, or a preserved local/Docker sandbox).
```bash
fabro cp <run-id>:/path/in/sandbox ./local-dir # download
fabro cp ./local-file <run-id>:/path/in/sandbox # upload
fabro cp -r <run-id>:/output ./results # recursive download
```
| Argument / Flag | Description |
|---|---|
| `<SRC>` | Source: `<run-id>:<path>` for sandbox, or a local path |
| `<DST>` | Destination: `<run-id>:<path>` for sandbox, or a local path |
| `-r, --recursive` | Recurse into directories |
Run IDs support prefix matching — you can use the first few characters instead of the full ID.
## `fabro pr`
Manage GitHub pull requests created by workflow runs. Requires a [GitHub App](/integrations/github) to be configured.
### `fabro pr create`
Create a GitHub pull request from a completed workflow run. Uses the run's persisted manifest, conclusion, and diff.
```bash
fabro pr create <run-id>
fabro pr create <run-id> --model claude-opus-4-6
```
| Argument / Flag | Description |
|---|---|
| `<RUN_ID>` | Run ID or prefix (required) |
| `--model <MODEL>` | LLM model for generating the PR description |
The run must have completed successfully (or with partial success) and have a `final.patch` with changes.
### `fabro pr list`
List all pull requests created by workflow runs. Shows PR number, title, status, and the associated run ID.
```bash
fabro pr list
fabro pr list --all
```
| Flag | Description |
|---|---|
| `--all` | Include closed and merged PRs (default: open only) |
### `fabro pr view`
Show details of a pull request from a specific run.
```bash
fabro pr view <run-id>
```
| Argument | Description |
|---|---|
| `<RUN_ID>` | Run ID or prefix (required) |
### `fabro pr merge`
Merge a pull request from a specific run.
```bash
fabro pr merge <run-id>
fabro pr merge <run-id> --method rebase
```
| Argument / Flag | Description |
|---|---|
| `<RUN_ID>` | Run ID or prefix (required) |
| `--method <METHOD>` | Merge method: `squash` (default), `merge`, or `rebase` |
### `fabro pr close`
Close a pull request from a specific run without merging.
```bash
fabro pr close <run-id>
```
| Argument | Description |
|---|---|
| `<RUN_ID>` | Run ID or prefix (required) |
---
## `fabro system df`
Show disk usage of Fabro's data directory, including run logs, worktrees, server logs, and databases.
```bash
fabro system df
fabro system df -v
```
| Flag | Description |
|---|---|
| `-v, --verbose` | Show per-run breakdown |
## `fabro graph`
Render a workflow DOT graph as SVG or PNG. Requires [Graphviz](https://graphviz.org) (`dot`) to be installed.
```bash
fabro graph workflow.fabro
fabro graph workflow.fabro --format png -o diagram.png
fabro graph run.toml --format svg
```
| Argument / Flag | Description |
|---|---|
| `<WORKFLOW>` | Path to a `.fabro` workflow file or `.toml` run config (required) |
| `--format <FORMAT>` | Output format: `svg` (default) or `png` |
| `-o, --output <FILE>` | Output file path. Defaults to stdout. |
## `fabro skill install`
Install the built-in `fabro-create-workflow` skill for AI assistants (Claude Code, Codex). The skill teaches AI assistants Fabro's DOT syntax, node types, and run configuration format.
```bash
# Install into the current project (.claude/skills/ or .agents/skills/)
fabro skill install --for project --dir claude
# Install for all projects (user-level, ~/.claude/skills/)
fabro skill install --for user --dir claude
```
| Flag | Description |
|---|---|
| `--for <SCOPE>` | `user` (default) — installs to `~/<dir>/skills/`. `project` — installs to `./<dir>/skills/`. |
| `--dir <DIR>` | Directory convention: `claude` (`.claude/skills/`) or `agents` (`.agents/skills/`). Required. |
| `--force` | Overwrite an existing installation without prompting. |
## `fabro validate`
Validate a workflow file without executing it. Reports errors and warnings. Accepts both `.fabro` workflow files and `.toml` run configs.
```bash
fabro validate workflow.fabro
fabro validate run.toml
```
| Argument | Description |
|---|---|
| `<WORKFLOW>` | Path to a `.fabro` workflow file or `.toml` run config (required) |
## `fabro parse`
Parse a DOT file and print its AST as JSON. Useful for debugging workflow definitions.
```bash
fabro parse workflow.fabro
```
| Argument | Description |
|---|---|
| `<WORKFLOW>` | Path to the `.fabro` workflow file (required) |
---
## `fabro init`
Initialize a new Fabro project in the current git repository. Creates an `fabro.toml` project config and a sample `hello` workflow.
```bash
fabro init
```
The command must be run inside a git repository. It creates:
- `fabro.toml` — project configuration with comments and a link to docs
- `fabro/workflows/hello/workflow.fabro` — a simple greeting workflow
- `fabro/workflows/hello/workflow.toml` — run config for the hello workflow
## `fabro diff`
Show the diff from a workflow run. Displays the `final.patch` for completed runs, or connects to the sandbox for a live diff from in-progress runs.
```bash
fabro diff <run-id>
fabro diff <run-id> --node work
fabro diff <run-id> --stat
```
| Argument / Flag | Description |
|---|---|
| `<RUN>` | Run ID or prefix (required) |
| `--node <NODE>` | Show diff for a specific node instead of the full run |
| `--stat` | Show diffstat instead of full patch (live diffs only) |
| `--shortstat` | Show only files-changed/insertions/deletions summary (live diffs only) |
Output is colorized when writing to a terminal.
## `fabro ssh`
SSH into a Daytona sandbox from a completed or in-progress run. Creates temporary SSH credentials and connects directly, or prints the command with `--print`.
```bash
fabro ssh <run-id>
fabro ssh <run-id> --print
fabro ssh <run-id> --ttl 120
```
| Argument / Flag | Description |
|---|---|
| `<RUN>` | Run ID or prefix (required) |
| `--ttl <MINUTES>` | SSH credential expiry in minutes (default: 60) |
| `--print` | Print the SSH command instead of connecting |
See [SSH Access](/human-tools/ssh-access) for more details on SSH workflows.
## `fabro preview`
Generate a preview URL for a port exposed by a Daytona sandbox. Useful for accessing web servers, dev tools, or APIs running inside the sandbox.
```bash
fabro preview <run-id> <port>
fabro preview <run-id> 3000 --signed
fabro preview <run-id> 3000 --open
```
| Argument / Flag | Description |
|---|---|
| `<RUN>` | Run ID or prefix (required) |
| `<PORT>` | Port number to preview (required) |
| `--signed` | Generate a signed URL (self-contained, no headers needed) |
| `--ttl <SECONDS>` | Signed URL expiry in seconds (default: 3600, requires `--signed`) |
| `--open` | Open the URL in a browser (implies `--signed`) |
Without `--signed`, the command prints the URL, token, and a `curl` example. See [Preview](/human-tools/preview) for more details.
---
## `fabro doctor`
Check environment and integration health. Verifies system dependencies, API keys, and optional services. Probes live services (LLM providers, sandbox, GitHub App) by default.
```bash
fabro doctor
fabro doctor -v
fabro doctor --dry-run
```
| Flag | Description |
|---|---|
| `-v, --verbose` | Show detailed information for each check |
| `--dry-run` | Skip live service probes (LLM, sandbox, API, web, Brave Search) |
## `fabro install`
Interactive setup wizard that walks you through configuring API keys and validating your environment. Runs `fabro doctor` with live probes after setup to validate the configuration.
```bash
fabro install
```
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