ralph-workflow 0.8.0b6

Vendor-neutral AI coding workflow orchestration with unattended execution, recovery, and verification.

Ralph Workflow (Python)

Vendor-neutral AI coding workflow orchestration — unattended, auditable, and configured in your repo.

Ralph Workflow is a Python 3.12+ CLI package and framework for policy-driven AI coding workflows. You decide which agent runs which phase, keep the workflow configuration in repo-local TOML, and let Ralph Workflow plan, implement, review, fix, and commit work for you. The runtime is a generic policy interpreter: all workflow behavior — phase routing, retry rules, analysis loops, commit semantics, verification gates, recovery routing, and parallel execution constraints — is declared in TOML policy files and enforced by the runtime without hardcoded phase knowledge.

The package exposes two entry points:

• ralph — the main CLI
• ralph-mcp — the standalone MCP server runtime

What Ralph Workflow is

Ralph Workflow sits across AI coding vendors rather than locking you into one tool. It can route work across Claude Code, Codex, OpenCode, and any OpenCode-wrapped model, so you can use frontier models where reasoning matters and cheaper models where they are enough.

Key differentiators:

• Vendor-neutral orchestration — choose different agents for planning, development, review, fix, and commit
• Cost arbitrage — route frontier models to planning/review and cheaper models to development/fix
• Unattended execution — walk away and come back to a reviewed diff instead of babysitting an agent
• Workflow config in repo — phase graph, agent chains, retry budgets, and recovery rules live in versioned config
• Recovery and verification discipline — checkpoint/resume, failure classification, and evidence-based phase completion

Policy-Driven Orchestration

Ralph Workflow's pipeline behavior is defined entirely by three TOML policy files:

File	What it declares
.agent/pipeline.toml	Phase graph, roles, transitions, retry rules, analysis loops, commit semantics, recovery routing, parallel execution
.agent/ralph-workflow.toml	Agent chains and drain-to-chain bindings
.agent/artifacts.toml	Artifact contracts and decision vocabularies per drain

The runtime validates that policy is semantically complete at startup and rejects incomplete configurations with actionable errors — it does not silently fall back to hidden built-in semantics.

Policy surfaces that are configurable:

• Phase roles (execution, analysis, review, commit, verification, terminal, fanout_join)
• Transition graph (on_success, on_failure, on_loopback)
• Analysis loop bounds and iteration counters
• Decision vocabulary and per-decision routing
• Commit counter type and loop reset behavior
• Post-commit budget-guarded routing
• Retry and fallback strategy per phase
• Recovery cycle cap and terminal routing
• Parallel execution constraints
• Artifact requirements per drain

To understand why Ralph Workflow routed a certain way, read the active .agent/pipeline.toml — all routing decisions trace back to declared policy, not code branches.

To add or change workflow behavior, update pipeline.toml. Incomplete policy is rejected at startup with a PolicyValidationError listing the missing fields.

Install

PyPI

pip install ralph-workflow
ralph --help

Requires Python 3.12+.

pipx

python -m pip install pipx
python -m pipx ensurepath
pipx install ralph-workflow
ralph --help

From source

git clone https://codeberg.org/RalphWorkflow/Ralph-Workflow.git
cd Ralph-Workflow/ralph-workflow
pip install -e .
ralph --version

Quick start

cd /path/to/your/project
ralph --init
# edit PROMPT.md
ralph

ralph --init is the canonical form. Compatibility labels such as default are deprecated, ignored, and no longer recommended in docs or scripts.

First-run configuration

On first run, Ralph Workflow creates the standard project and user config files from bundled templates.

User-global (created once, reused across projects):

• ~/.config/ralph-workflow.toml — main Ralph Workflow configuration
• ~/.config/ralph-workflow-mcp.toml — MCP servers, web search, and web visit configuration

Project-local (created by ralph --init, lives in your project directory):

• .agent/ralph-workflow.toml — project-local main config override, including agent chains and drain bindings
• .agent/mcp.toml — project-local MCP override
• .agent/pipeline.toml — phase graph and orchestration settings
• .agent/artifacts.toml — MCP artifact contracts per drain

Override precedence (highest to lowest): CLI flags → project-local (.agent/) → user-global (~/.config/) → bundled defaults

To reset configs from the bundled defaults (existing files are backed up to <name>.bak), run:

ralph --regenerate-config

Before your first real run, it is a good idea to validate your environment:

ralph --diagnose

How a run works

When you run ralph, the workflow moves through a structured sequence of phases:

1. Planning — a planning agent reads PROMPT.md and produces a structured plan
2. Development — a developer agent implements the work
3. Development analysis — the workflow decides whether to iterate or continue
4. Development commit — changes are committed
5. Review — a reviewer agent inspects the result and produces issues if needed
6. Review analysis — the workflow decides whether to loop to fix or continue
7. Fix — a fix agent resolves issues found during review
8. Review commit — final changes are committed
9. Complete — the workflow ends successfully

If review finds significant problems, the review → fix cycle repeats up to the configured limit.

Compatible agents

Ralph Workflow supports three built-in transport families and several naming forms on top of them.

Identifier form	What it means	Example
claude	Claude Code using your currently selected Claude Code model/profile	planning = ["claude"]
claude/<family>	Force a Claude model family for that chain entry	planning = ["claude/opus"]
codex	OpenAI Codex CLI transport	review = ["codex"]
opencode	Base OpenCode transport	development = ["opencode"]
opencode/<provider>/<model>	OpenCode with an explicit provider/model target	development = ["opencode/minimax/MiniMax-M2.7-highspeed"]
ccs/<alias>	Claude Code Switch alias resolved dynamically	planning = ["ccs/work"]
custom [agents.*] name	Your own named agent definition in ralph-workflow.toml	review = ["my-reviewer"]

Built-in transports:

Transport	Strong at	Setup
Claude Code	Planning, complex reasoning, large context	npm install -g @anthropic/claude-code
Codex CLI	Structured review, cost-effective analysis	npm install -g @openai/codex
OpenCode	Multi-provider execution across OpenCode-supported models	opencode.ai
CCS	Profile-based Claude Code switching and aliasing	Use ccs/<alias> directly

When Ralph Workflow fits

• Multi-step coding tasks that do not fit in one prompt
• Refactors, test suites, docs, or features that take longer unattended runs
• Work where you want to walk away and come back to reviewed commits
• Teams that need cost-controlled, auditable, or workflow-configured agent execution
• Anyone tired of paying frontier-model rates for grunt work cheaper models handle fine

When it does not fit

• One-shot prompts you can answer interactively
• Pair-programming sessions where you want to steer in real time
• Tasks that finish manually before setup overhead pays off
• Workflows that need unpredictable mid-run human input

Standalone MCP runtime

The package also ships ralph-mcp, a standalone MCP HTTP server runtime:

ralph-mcp --help

Use it when you want Ralph Workflow's MCP tool surface without running the full ralph pipeline.

Verification

make verify

That runs:

• ruff check ralph/ tests/
• uv run python -m mypy ralph/
• uv run --extra docs sphinx-build -b html docs/sphinx docs/sphinx/_build/html -W --keep-going
• uv run python -m ralph.verify_timeout --suite-timeout 30 -- pytest tests/ -q -n 8 --cov=ralph --cov-report=term-missing --cov-report=html --cov-fail-under 80

For narrower local runs, use:

• make docs — build Sphinx HTML into docs/sphinx/_build/html with warnings treated as errors
• make test — full pytest suite without coverage
• make test-unit — everything under tests/ except tests/integration/
• make test-integration — tests/integration/ only

For the dead-code policy tooling, run the separate Vulture audit:

make dead-code

It is intentionally separate from make verify while the current dead-code backlog still exists; today the command proves the scanner wiring by failing on the code that still needs cleanup.

Package map

• ralph/cli/ — Typer CLI entry points and command plumbing
• ralph/config/ — layered config loading and Pydantic models
• ralph/pipeline/ — state, events, reducer, orchestrator, effects
• ralph/phases/ — phase handlers and dispatch
• ralph/agents/ — agent registry, chains, and invocation
• ralph/mcp/ — MCP bridge, artifact handling, standalone server runtime
• ralph/git/ — GitPython-backed repository helpers and rebase support
• ralph/workspace/ — production and in-memory filesystem abstractions
• ralph/recovery/ — failure classification, budgets, connectivity monitoring, and recovery controller

Pydoc-first API reference

The public package docstrings are intended to stand on their own. Useful entry points:

python -m pydoc ralph
python -m pydoc ralph.cli
python -m pydoc ralph.pipeline
python -m pydoc ralph.mcp
python -m pydoc ralph.git
python -m pydoc ralph.workspace
python -m pydoc ralph.recovery

Use package/module docstrings for API understanding and this README for workflow-level guidance.

Phase-output hardening

Ralph Workflow now treats several agent-driven phases as producing explicit evidence, not just a zero exit code.

• review must leave behind a fresh .agent/artifacts/issues.json.
• In same-workspace parallel mode, development and fix workers are judged by per-worker artifact evidence only: a worker succeeds when it submits an artifact under .agent/workers/<unit_id>/artifacts/. Repo-wide git status is never used to determine worker success in parallel mode. Exit code is retained as diagnostic information only.
• Planning keeps .agent/artifacts/plan.json as the canonical machine-readable artifact and mirrors it to .agent/PLAN.md as the human/agent handoff.
• The runner still removes per-phase artifacts before each invocation so interrupted runs cannot leak stale summaries or review findings into later phases.

Artifact contract:

• Use .json artifacts for Ralph Workflow's validation, routing, checkpointing, and other orchestrator-only logic.
• Use .md handoff files when a user or downstream AI agent needs to read the result of an earlier phase.
• Current mirrored handoffs are:
  • .agent/PLAN.md
  • .agent/DEVELOPMENT_RESULT.md
  • .agent/ISSUES.md
  • .agent/FIX_RESULT.md
  • .agent/DEVELOPMENT_ANALYSIS_DECISION.md
  • .agent/REVIEW_ANALYSIS_DECISION.md

This hardening is intentionally selective. Review and planning rely on explicit artifacts where Ralph Workflow needs structured evidence. In same-workspace parallel mode, development and fix workers are judged by per-worker artifact evidence under .agent/workers/<unit_id>/artifacts/; repo-wide workspace changes are not used as a success signal in parallel mode.

Built-in web tools

Web search (web_search)

Enabled by default. Uses a multi-backend fallback chain (ddgs, Tavily, Brave, Exa, SearXNG). Configure via [web_search] in mcp.toml.

URL fetching (visit_url)

A built-in visit_url tool fetches a single HTTP/HTTPS page and returns readable extracted text. Requires the optional extras:

pip install "ralph-workflow[web-visit]"

Configure via [web_visit] in mcp.toml. See docs/mcp/web-visit.md for the full reference.

For multi-page or JavaScript-rendered crawling, wire in Crawl4AI as an upstream MCP server — see docs/mcp/mcp-servers.md.

Multimodal MCP support (opt-in)

Ralph Workflow supports image-reading MCP tools via read_image. This feature is disabled by default.

Enable it in .agent/mcp.toml:

[media]
enabled = true
max_inline_bytes = 5242880  # 5 MiB default

When enabled:

• supported formats are PNG, JPEG, GIF, and WebP
• read_image only appears for clients that declare multimodal/image/media capability
• text-only clients keep the pre-multimodal tool set unchanged
• image payloads are returned as MCP image content blocks with base64-encoded data
• max_inline_bytes enforces the inline size guard (5 MiB by default)

Compatibility contract

The multimodal support is designed with strict backward compatibility:

1. Text-only clients unchanged — Existing tools (read_file, write_file, etc.) continue to return text content blocks with the same shape.
2. Client capability filtering — read_image only appears in tools/list for clients that declare multimodal/image/media capability in the MCP initialize handshake.
3. Upstream multimodal rejection — If an upstream MCP server returns a non-text content block, Ralph Workflow rejects it with a clear error rather than silently passing it through.

What text-only clients see

When a client connects without declaring multimodal support, read_image is not visible in tools/list, even if media.enabled = true. The text-only tool set is byte-equivalent to pre-multimodal behavior.

What multimodal clients see

Clients that declare capabilities.image, capabilities.media, or capabilities.multimodal in the initialize request will see read_image in tools/list when media.enabled = true.

Claude/CCS MCP safety note

Claude-compatible transports such as claude and ccs run through a stricter MCP path. Ralph Workflow still uses --mcp-config plus --strict-mcp-config, but it only emits --tools "" / --allowedTools ... when live MCP tool discovery succeeds with a non-empty allowlist. That avoids a brittle edge case in non-interactive Claude/CCS runs where empty-tool configurations and MCP bootstrapping can produce misleadingly successful no-op executions.

Ralph Workflow's Claude parser accepts both bare (claude: ...) and model-qualified (claude/<model>: ...) transcript prefixes emitted by the Claude CLI. Lifecycle-only markers (message_delta, user, system (status=...), thinking without a payload) are automatically suppressed so they never appear as noise in the activity log. Free-form text and tool lines after the prefix are parsed normally.

Parallel mode

When the planning phase produces two or more work units, Ralph Workflow runs them as parallel workers in the same git checkout (same-workspace mode v1). Each worker is restricted to its declared allowed_directories and writes its artifacts under .agent/workers/<unit_id>/. Workers share the checkout and write to it directly, without separate git branches; coordination uses edit-area fencing and artifact namespaces only. For the full guide including configuration, work unit structure, and success criteria, see docs/sphinx/parallel-mode.md.

Quick configuration (in .agent/pipeline.toml):

[phases.development.parallelization]
mode = "same_workspace"
max_parallel_workers = 4
max_work_units = 50

See docs/sphinx/parallel-mode.md for the full guide.

Recovery

Ralph Workflow treats failure recovery as a first-class concern. It supports checkpoint/resume, failure classification, retry budgets, and connectivity-aware pause/resume behavior.

See docs/sphinx/recovery.md for the full guide.

Long-content display

When agent output gets large, Ralph Workflow keeps the terminal readable by summarizing oversized content. The deterministic headline summary layer is enabled by default and activates once content exceeds 4000 display cells. That summary appears before the condensed output and gives you a stable, deterministic headline instead of making you scroll through a giant block.

If no clean headline can be extracted, Ralph Workflow shows the placeholder (no headline available). Inline summary lines are capped at 200 characters, and streaming end-line summaries are capped at 120 characters.

To disable the deterministic headline layer, use any of these values for RALPH_LONG_CONTENT_SUMMARY: 0, false, no, or off. It is already on by default, so you do not need an "enable" value for it.

Ralph Workflow also supports an optional AI-generated summary layer labelled ↳ ai-summary:. That layer is controlled separately through the RALPH_LONG_CONTENT_AI_SUMMARY opt-in environment variable.

Documentation

The full documentation lives in docs/sphinx/ and is published under /docs at https://ralphworkflow.com. Useful pages:

• docs/sphinx/getting-started.md — step-by-step first-run walkthrough
• docs/sphinx/quickstart.md — install, init, and run in five minutes
• docs/sphinx/concepts.md — phases, drains, agents, MCP artifacts, checkpoints
• docs/sphinx/cli.md — all CLI flags and sub-commands
• docs/sphinx/configuration.md — config files, precedence, and FAQ
• docs/sphinx/reference.md — operator-facing reference index
• docs/sphinx/recovery.md — failure classification, retry budgets, and recovery behavior
• docs/sphinx/parallel-mode.md — same-checkout parallel execution for multi-work-unit plans
• docs/sphinx/troubleshooting.md — common issues and FAQ

License

AGPL-3.0-or-later.

The framework is copyleft. The code Ralph Workflow generates belongs to you — no license encumbrance on outputs. Use it commercially. Use it privately. Use it however you want.