writing-agent-relay-workflows

name

writing-agent-relay-workflows

description

Use when building multi-agent workflows with relay broker-sdk. Covers conversation vs pipeline coordination, WorkflowBuilder/DAG steps, agents, {{steps.X.output}} chaining, Relayfile-backed human assistance, Slack answer injection, integration subscriptions, waitFor gates, repairable verification, review-depth fresh-eyes review/fix loops with test hardening, channels, chat-native recipes, error handling, event listeners, step sizing, lead+workers teams, and parallel waves.

Overview

The relay broker-sdk workflow system orchestrates multiple AI agents (Claude, Codex, Gemini, Aider, Goose) through typed DAG-based workflows. Workflows can be written in TypeScript (preferred), Python, or YAML.

Language preference: TypeScript > Python > YAML. Use TypeScript unless the project is Python-only or a simple config-driven workflow suits YAML.

Pattern selection: Do not default to dag blindly. If the job needs a different swarm/workflow type, consult the choosing-swarm-patterns skill when available and select the pattern that best matches the coordination problem.

When to Use

• Building multi-agent workflows with step dependencies
• Orchestrating different AI CLIs (claude, codex, gemini, aider, goose)
• Creating DAG, pipeline, fan-out, or other swarm patterns
• Needing verification gates, retries, or step output chaining
• Designing product-contract workflows where failing checks should route to agents for repair instead of stopping the run
• Dynamic channel management: agents joining/leaving/muting channels mid-workflow
• Adding human-in-the-loop Slack questions that block the workflow and inject the answer back into the active agent
• Subscribing workflows or agents to Relayfile integration events such as GitHub PR reviews, status checks, Linear issue events, or Slack replies
• Building event-started or event-gated workflows that use SDK surfaces instead of local provider CLIs

Non-Negotiable Workflow Checklist

Every generated workflow should satisfy this checklist before it is considered complete:

1. Start with a deterministic, resumable preflight for repository state, credentials, and declared write scope.
2. Pick the coordination shape deliberately: Conversation for non-trivial coordination, Pipeline only for linear one-shot handoffs.
3. Use repairable validation gates: capture red output with failOnError: false, hand it to a repair owner, then rerun the same check.
4. Run fresh-eyes review at the depth warranted by the spec: deep-tier workflows use Claude review/fix/final review/final fix followed by Codex review/fix/final review/final fix; lighter generated workflows may scale down only when deterministic gates, hard validation, and at least one independent Claude review/fix pass remain on the critical path.
5. Require review fixers to add or update appropriate tests, fixtures, assertions, or deterministic proofs for testable findings.
6. Run final deterministic acceptance after the selected review-depth path and before commit, PR creation, or handoff.
7. If a real blocker remains, write BLOCKED_NO_COMMIT with exact evidence and skip commit/PR creation instead of crashing the workflow.
8. If the workflow owns shipping, model branch, commit, push, PR creation, and PR URL verification as explicit deterministic steps.
9. For Slack questions, declare swarm.humanAssistance.slack.channel and instruct agents to print exactly one HUMAN_QUESTION: <question> line when blocked.
10. For integration-backed behavior, declare integrations.relayfile: {} and use SDK integration steps, subscriptions, or waitFor gates; do not require workspaceId, tokens, Slack bot tokens, or local provider CLIs in the workflow.

Default Principle: Workflows Repair Before They Fail

• Run deterministic checks as evidence-capturing gates with captureOutput: true.
• Prefer failOnError: false for intermediate validation gates so the workflow can pass the output to a repair agent.
• Add a repair step immediately after each red-prone gate. The repair agent reads {{steps.<gate>.output}}, fixes source/tests/config, reruns the same command locally, and exits only after the gate is green or the blocker is external.
• Keep final acceptance deterministic, but still put an agent repair step before commit/PR creation. If the repair budget is exhausted or a true external blocker remains, write a blocked artifact and skip commit/PR creation; do not let the workflow end as FAILED.
• Use .reliable() or .repairable() on SDK versions that support it, especially for product-contract workflows. As of AgentWorkforce/relay#827, retry-mode workflows with agents are repair-aware by default, repair agents run before retrying malformed/failed agent steps, and the SDK covers DAG, pipeline, fan-out, worktree-backed, deterministic-only, and agent-plus-gate shapes.

Human Assistance and Relayfile Events

Slack Human Assistance

version: '1.0'
name: blocked-agent-question
swarm:
  pattern: dag
  humanAssistance:
    slack:
      channel: proj-cloud
      timeoutMs: 3600000
integrations:
  relayfile: {}
agents:
  - name: implementer
    cli: codex
    role: Implementer that can ask the human one concise question when blocked
workflows:
  - name: default
    steps:
      - name: implement
        agent: implementer
        task: |
          Implement the requested change.
          If you are blocked by missing product intent or an unsafe decision, print exactly:
          HUMAN_QUESTION: <your concise question>
          Then wait for the injected HUMAN_ANSWER before continuing.

Relayfile Integration Subscriptions

version: '1.0'
name: pr-feedback-babysitter
swarm:
  pattern: dag
  humanAssistance:
    slack:
      channel: proj-cloud
integrations:
  relayfile: {}
  subscriptions:
    - name: pr-feedback
      provider: github
      path: /github/repos/acme/web/pulls/42/**
      events: [created, updated]
      agents: [pr-babysitter]
agents:
  - name: pr-babysitter
    cli: codex
    role: PR babysitter that fixes review comments until the PR is ready
    subscriptions:
      - name: review-events
        provider: github
        paths:
          - /github/repos/acme/web/pulls/42/reviews/**
          - /github/repos/acme/web/pulls/42/status/**
        events: [created, updated]
workflows:
  - name: default
    steps:
      - name: wait-for-first-review
        type: waitFor
        waitFor:
          provider: github
          path: /github/repos/acme/web/pulls/42/reviews/**
          event: created
          timeoutMs: 3600000
      - name: address-feedback
        agent: pr-babysitter
        dependsOn: [wait-for-first-review]
        task: |
          Review the first event payload:
          {{steps.wait-for-first-review.output}}

          Stay subscribed to INTEGRATION_EVENT updates for this PR.
          Address review comments and failing status checks until no open feedback remains.
          If you need a decision, print exactly one HUMAN_QUESTION line and wait for HUMAN_ANSWER.

Review-Depth Fresh-Eyes Loops

Review depth changes only the number of LLM fresh-eyes passes. It never removes deterministic proof, repairable validation, final hard validation, scoped diff evidence, blocked-state handling, or final signoff.

verdict: FINDINGS | NO_ISSUES_FOUND | BLOCKED
finding_id: short stable id
severity: blocker | high | medium | low
file: path/to/file
issue: what is wrong
fix_required: concrete change needed
test_required: test, fixture, assertion, or proof command needed
status: open | fixed | wontfix | blocked
evidence: commands run, file paths, or blocker details

Choose Your Coordination Style — Conversation vs Pipeline

Before writing the workflow, decide how the agents will coordinate. The relay primitive supports two very different shapes, and picking the wrong one wastes the most valuable thing the SDK gives you.

Shape	What it is	Use when
Conversation (chat-native)	Interactive agents share a channel; messages, @-mentions, and ambient awareness drive coordination. Lead and workers spawn in parallel and self-organize. The relay is the coordination layer, not just transport.	Multi-file work, peer review loops, cross-agent feedback, dynamic re-planning, multi-PR coordination, anything with a human-in-the-loop escape, swarms where workers pick up each other's output.
Pipeline (one-shot DAG)	Each step runs as a one-shot subprocess (claude -p, codex exec); steps hand off via {{steps.X.output}} text injection. No agents are alive at the same time; no chat happens.	Linear, well-specified transformations; deterministic data passing; no live agent-to-agent coordination during implementation. The selected review-depth path and deterministic final gates still apply.

Default to Conversation for any non-trivial work. Pipeline DAGs are simpler to reason about but they do not exercise the relay primitive — they are a Unix pipe with extra steps. If you would happily write the same task as a single shell pipeline, pipeline-shape is fine. Otherwise, you almost certainly want a Conversation shape.

The two shapes can mix within one workflow: pipeline-style deterministic preflight → conversation in the middle → pipeline-style commit-and-PR at the end. See Quick Reference (Conversation) below and Common Patterns → Interactive Team for the canonical recipe.

A blunt rule of thumb: if your workflow only uses agent steps with preset: 'worker' chained by {{steps.X.output}}, you are not using the relay — you are using claude -p | codex exec. That may still be the right answer; just make it a deliberate choice.

Quick Reference (Pipeline shape)

> Use this when steps are linear, well-specified, and need no agent-to-agent feedback. For anything with iteration, review, or coordination, jump to Quick Reference (Conversation shape) below.

import { workflow } from '@agent-relay/sdk/workflows';

async function runWorkflow() {
  const result = await workflow('my-workflow')
    .description('What this workflow does')
    .pattern('dag') // or 'pipeline', 'fan-out', etc.
    .channel('wf-my-workflow') // dedicated channel (auto-generated if omitted)
    .maxConcurrency(3)
    .timeout(3_600_000) // global timeout (ms)
    .repairable()

    .agent('lead', { cli: 'claude', role: 'Architect', retries: 2 })
    .agent('worker', { cli: 'codex', role: 'Implementer', retries: 2 })
    .agent('claude-reviewer', { cli: 'claude', role: 'First-pass fresh-eyes reviewer', retries: 1, preset: 'reviewer' })
    .agent('claude-fixer', { cli: 'claude', role: 'First-pass review-finding fixer', retries: 2 })
    .agent('codex-reviewer', { cli: 'codex', role: 'Second-pass fresh-eyes reviewer', retries: 1, preset: 'reviewer' })
    .agent('codex-fixer', { cli: 'codex', role: 'Review-finding fixer', retries: 2 })

    .step('preflight', {
      type: 'deterministic',
      command: 'git rev-parse --show-toplevel >/dev/null && echo PREFLIGHT_OK',
      captureOutput: true,
      failOnError: true,
    })
    .step('plan', {
      agent: 'lead',
      dependsOn: ['preflight'],
      task: `Analyze the codebase and produce a plan.`,
      retries: 2,
      verification: { type: 'output_contains', value: 'PLAN_COMPLETE' },
    })
    .step('implement', {
      agent: 'worker',
      task: `Implement based on this plan:\n{{steps.plan.output}}`,
      dependsOn: ['plan'],
      verification: { type: 'exit_code' },
    })
    .step('claude-review', {
      agent: 'claude-reviewer',
      dependsOn: ['implement'],
      task: `Fresh-eyes review the completed workflow output. Read the actual files, diff, repo rules, and available evidence.
Write findings to .workflow-artifacts/my-workflow/claude-review.md.
If there are no actionable issues, write NO_ISSUES_FOUND.`,
      verification: { type: 'exit_code' },
    })
    .step('claude-fix', {
      agent: 'claude-fixer',
      dependsOn: ['claude-review'],
      task: `Read .workflow-artifacts/my-workflow/claude-review.md.
Fix every valid issue, add or update appropriate tests/proofs for the fix, rerun relevant checks, and update .workflow-artifacts/my-workflow/claude-fix.md.
If the review says NO_ISSUES_FOUND, record that no fix was needed.`,
      verification: { type: 'exit_code' },
    })
    .step('claude-review-final', {
      agent: 'claude-reviewer',
      dependsOn: ['claude-fix'],
      task: `Fresh-eyes review the post-fix state from scratch. Do not rely on the prior review or fix summary.
Write .workflow-artifacts/my-workflow/claude-review-final.md with either actionable findings or NO_ISSUES_FOUND.`,
      verification: { type: 'exit_code' },
    })
    .step('claude-fix-final', {
      agent: 'claude-fixer',
      dependsOn: ['claude-review-final'],
      task: `If .workflow-artifacts/my-workflow/claude-review-final.md contains findings, fix them, add or update appropriate tests/proofs, and rerun relevant checks.
If no fix is possible, write .workflow-artifacts/my-workflow/BLOCKED_NO_COMMIT.md with exact evidence.
If it says NO_ISSUES_FOUND, record Claude review signoff.`,
      verification: { type: 'exit_code' },
    })
    .step('codex-review', {
      agent: 'codex-reviewer',
      dependsOn: ['claude-fix-final'],
      task: `Second-pass fresh-eyes review of the post-Claude-fix state. Read the actual files, diff, repo rules, and available evidence.
Write findings to .workflow-artifacts/my-workflow/codex-review.md.
If there are no actionable issues, write NO_ISSUES_FOUND.`,
      verification: { type: 'exit_code' },
    })
    .step('codex-fix', {
      agent: 'codex-fixer',
      dependsOn: ['codex-review'],
      task: `Read .workflow-artifacts/my-workflow/codex-review.md.
Fix every valid issue, add or update appropriate tests/proofs for the fix, rerun relevant checks, and update .workflow-artifacts/my-workflow/codex-fix.md.
If the review says NO_ISSUES_FOUND, record that no fix was needed.`,
      verification: { type: 'exit_code' },
    })
    .step('codex-review-final', {
      agent: 'codex-reviewer',
      dependsOn: ['codex-fix'],
      task: `Fresh-eyes review the post-Codex-fix state from scratch. Do not rely on the prior review or fix summary.
Write .workflow-artifacts/my-workflow/codex-review-final.md with either actionable findings or NO_ISSUES_FOUND.`,
      verification: { type: 'exit_code' },
    })
    .step('codex-fix-final', {
      agent: 'codex-fixer',
      dependsOn: ['codex-review-final'],
      task: `If .workflow-artifacts/my-workflow/codex-review-final.md contains findings, fix them, add or update appropriate tests/proofs, and rerun relevant checks.
If no fix is possible, write .workflow-artifacts/my-workflow/BLOCKED_NO_COMMIT.md with exact evidence.
If it says NO_ISSUES_FOUND, record final review signoff.`,
      verification: { type: 'exit_code' },
    })
    .step('acceptance-after-review', {
      type: 'deterministic',
      dependsOn: ['codex-fix-final'],
      command: 'test ! -f .workflow-artifacts/my-workflow/BLOCKED_NO_COMMIT.md && echo ACCEPTANCE_OK',
      captureOutput: true,
      failOnError: true,
    })

    .onError('retry', { maxRetries: 2, retryDelayMs: 10_000 })
    .run({ cwd: process.cwd() });

  console.log('Result:', result.status);
}

runWorkflow().catch((error) => {
  console.error(error);
  process.exit(1);
});

Quick Reference (Conversation shape)

> Use this for any non-trivial work — peer review, multi-file edits, cross-agent feedback, dynamic re-planning. Lead and workers spawn in parallel on a shared channel and self-organize via messages. The relay primitive does the coordinating; verification gates downstream of the lead close the workflow.

import { workflow } from '@agent-relay/sdk/workflows';
import { ClaudeModels, CodexModels } from '@agent-relay/config';

async function runWorkflow() {
  const result = await workflow('my-workflow')
  .description('Multi-file change with peer review')
  .pattern('dag')
  .channel('wf-my-feature')          // dedicated channel — agents share it
  .maxConcurrency(4)
  .timeout(3_600_000)
  .repairable()

  // Interactive agents — no preset, they live on the channel
  .agent('lead', {
    cli: 'claude',
    model: ClaudeModels.OPUS,
    role: 'Architect + reviewer. Plans, assigns, reviews, posts feedback.',
    retries: 1,
  })
  .agent('impl-a', {
    cli: 'codex',
    model: CodexModels.GPT_5_4,
    role: 'Implementer. Listens on channel for assignments and feedback.',
    retries: 2,
  })
  .agent('impl-b', {
    cli: 'codex',
    model: CodexModels.GPT_5_4,
    role: 'Implementer. Listens on channel for assignments and feedback.',
    retries: 2,
  })
  .agent('claude-reviewer', {
    cli: 'claude',
    model: ClaudeModels.OPUS,
    preset: 'reviewer',
    role: 'First-pass fresh-eyes reviewer. Reads the final diff and artifacts from scratch.',
    retries: 1,
  })
  .agent('claude-fixer', {
    cli: 'claude',
    model: ClaudeModels.SONNET,
    role: 'First-pass review-finding fixer. Repairs valid findings, adds tests/proofs, and reruns checks.',
    retries: 2,
  })
  .agent('codex-reviewer', {
    cli: 'codex',
    model: CodexModels.GPT_5_4,
    preset: 'reviewer',
    role: 'Second-pass fresh-eyes reviewer. Reviews the post-Claude-fix state from scratch.',
    retries: 1,
  })
  .agent('codex-fixer', {
    cli: 'codex',
    model: CodexModels.GPT_5_4,
    role: 'Review-finding fixer. Repairs valid findings, adds tests/proofs, and reruns checks.',
    retries: 2,
  })

  // Deterministic context — pre-reads files once, posts to the channel for everyone
  .step('preflight', {
    type: 'deterministic',
    command: 'git rev-parse --show-toplevel >/dev/null && echo PREFLIGHT_OK',
    captureOutput: true,
    failOnError: true,
  })
  .step('context', {
    type: 'deterministic',
    dependsOn: ['preflight'],
    command: 'git ls-files src/',
    captureOutput: true,
  })

  // Lead and workers all depend on `context` — they start CONCURRENTLY.
  // They coordinate over #wf-my-feature, not via {{steps.X.output}}.
  .step('lead-coordinate', {
    agent: 'lead',
    dependsOn: ['context'],
    task: `You are the lead on #wf-my-feature. Workers: impl-a, impl-b.
Post the plan. Assign files. Review their PRs/diffs. Post feedback in-channel.
Workers iterate based on your feedback. Exit when both files pass review.`,
  })
  .step('impl-a-work', {
    agent: 'impl-a',
    dependsOn: ['context'],   // SAME dep as lead → starts in parallel, no deadlock
    task: `You are impl-a on #wf-my-feature. Wait for the lead's plan.
Implement your assigned file. Post a completion message. Address feedback.`,
  })
  .step('impl-b-work', {
    agent: 'impl-b',
    dependsOn: ['context'],   // SAME dep as lead
    task: `You are impl-b on #wf-my-feature. Wait for the lead's plan.
Implement your assigned file. Post a completion message. Address feedback.`,
  })

  // Downstream gates on the lead — lead exits when satisfied.
  // Capture failures, then hand them to an agent for repair.
  .step('verify', {
    type: 'deterministic',
    dependsOn: ['lead-coordinate'],
    command: 'npm run typecheck && npm test 2>&1',
    captureOutput: true,
    failOnError: false,
  })
  .step('repair-verify', {
    agent: 'lead',
    dependsOn: ['verify'],
    task: `If verification passed, summarize evidence.
If it failed, use this output to assign and fix issues, then rerun the command until green:
{{steps.verify.output}}`,
    verification: { type: 'exit_code' },
  })
  .step('verify-final', {
    type: 'deterministic',
    dependsOn: ['repair-verify'],
    command: 'npm run typecheck && npm test 2>&1',
    captureOutput: true,
    failOnError: false,
  })
  .step('claude-review', {
    agent: 'claude-reviewer',
    dependsOn: ['verify-final'],
    task: `First-pass fresh-eyes review of the post-implementation state.
Read the actual changed files, git diff, repo instructions, task spec, and verification output:
{{steps.verify-final.output}}

Write .workflow-artifacts/my-feature/claude-review.md with:
- actionable findings, each with file paths and required fix
- or NO_ISSUES_FOUND if there are no remaining issues`,
    verification: { type: 'exit_code' },
  })
  .step('claude-fix', {
    agent: 'claude-fixer',
    dependsOn: ['claude-review'],
    task: `Read .workflow-artifacts/my-feature/claude-review.md.
If there are findings, fix every valid one and add or update appropriate tests/proofs. After each fix, rerun the relevant check and review the changed files again.
Keep iterating locally until this round has no remaining valid issues.
Write .workflow-artifacts/my-feature/claude-fix.md with fixes and commands run.
If the review says NO_ISSUES_FOUND, write that no fix was needed.`,
    verification: { type: 'exit_code' },
  })
  .step('claude-review-final', {
    agent: 'claude-reviewer',
    dependsOn: ['claude-fix'],
    task: `Perform a fresh post-fix review from scratch. Do not rely on previous review text or the fixer's summary.
Read files, diff, repo rules, task spec, and evidence. Write .workflow-artifacts/my-feature/claude-review-final.md.
Use NO_ISSUES_FOUND only if there are no actionable issues left.`,
    verification: { type: 'exit_code' },
  })
  .step('claude-fix-final', {
    agent: 'claude-fixer',
    dependsOn: ['claude-review-final'],
    task: `If the final Claude review found issues, fix them, add or update appropriate tests/proofs, and rerun the relevant checks until green.
If no fix is possible, write .workflow-artifacts/my-feature/BLOCKED_NO_COMMIT.md with exact evidence and do not commit.
If the final review says NO_ISSUES_FOUND, record signoff in .workflow-artifacts/my-feature/claude-signoff.md.`,
    verification: { type: 'exit_code' },
  })
  .step('verify-after-claude-review', {
    type: 'deterministic',
    dependsOn: ['claude-fix-final'],
    command: 'test ! -f .workflow-artifacts/my-feature/BLOCKED_NO_COMMIT.md && npm run typecheck && npm test 2>&1',
    captureOutput: true,
    failOnError: false,
  })
  .step('codex-review', {
    agent: 'codex-reviewer',
    dependsOn: ['verify-after-claude-review'],
    task: `Second-pass fresh-eyes review of the post-Claude-fix state.
Read the actual changed files, git diff, repo instructions, task spec, and verification output:
{{steps.verify-after-claude-review.output}}

Write .workflow-artifacts/my-feature/codex-review.md with:
- actionable findings, each with file paths and required fix
- or NO_ISSUES_FOUND if there are no remaining issues`,
    verification: { type: 'exit_code' },
  })
  .step('codex-fix', {
    agent: 'codex-fixer',
    dependsOn: ['codex-review'],
    task: `Read .workflow-artifacts/my-feature/codex-review.md.
If there are findings, fix every valid one and add or update appropriate tests/proofs. After each fix, rerun the relevant check and review the changed files again.
Keep iterating locally until this round has no remaining valid issues.
Write .workflow-artifacts/my-feature/codex-fix.md with fixes and commands run.
If the review says NO_ISSUES_FOUND, write that no fix was needed.`,
    verification: { type: 'exit_code' },
  })
  .step('codex-review-final', {
    agent: 'codex-reviewer',
    dependsOn: ['codex-fix'],
    task: `Perform a fresh post-Codex-fix review from scratch. Do not rely on previous review text or the fixer's summary.
Read files, diff, repo rules, task spec, and evidence. Write .workflow-artifacts/my-feature/codex-review-final.md.
Use NO_ISSUES_FOUND only if there are no actionable issues left.`,
    verification: { type: 'exit_code' },
  })
  .step('codex-fix-final', {
    agent: 'codex-fixer',
    dependsOn: ['codex-review-final'],
    task: `If the final Codex review found issues, fix them, add or update appropriate tests/proofs, and rerun the relevant checks until green.
If no fix is possible, write .workflow-artifacts/my-feature/BLOCKED_NO_COMMIT.md with exact evidence and do not commit.
If the final review says NO_ISSUES_FOUND, record signoff in .workflow-artifacts/my-feature/codex-signoff.md.`,
    verification: { type: 'exit_code' },
  })
  .step('verify-after-review', {
    type: 'deterministic',
    dependsOn: ['codex-fix-final'],
    command: 'test ! -f .workflow-artifacts/my-feature/BLOCKED_NO_COMMIT.md && npm run typecheck && npm test 2>&1',
    captureOutput: true,
    failOnError: true,
  })

  .onError('retry', { maxRetries: 2, retryDelayMs: 10_000 })
  .run({ cwd: process.cwd() });

  console.log('Result:', result.status);
}

runWorkflow().catch((error) => {
  console.error(error);
  process.exit(1);
});

Default For Serious Implementation: Shadowed Squad Review Loop

• implementer: owns a tight file/subsystem scope and writes the change
• shadow reviewer: follows the implementer in real time, checks drift against the spec, and leaves feedback early
• optional validation owner: owns tests, dry-run proof, or fixture coverage when that is a separate deliverable
• Deterministically read the spec, AGENTS.md / CLAUDE.md, workflow standards, recent local docs, and declared file targets.
• Lead splits work into bounded squads with non-overlapping ownership.
• Squads run in parallel. The shadow reads actual files and channel updates, then posts feedback while the implementer is still active.
• Each implementer writes a self-reflection artifact before external review. It must answer: what changed, what spec items are satisfied, what tests/proofs ran, what risks remain, and how the work follows repo rules.
• A fresh self-review agent reads the post-implementation files, recent local conventions, AGENTS.md / CLAUDE.md, and related rules. It should not rely on the implementer's summary.
• The implementer gets that feedback and performs a repair pass.
• Deterministic gates run with captured output. Red output goes to a repair owner, then the same gate reruns.
• Run the selected review-depth fresh-eyes loop exactly: light ends after fix-loop and post-fix-validation; standard adds final-review-claude and final-fix-claude; deep adds the full Codex loop after the Claude final fix.
• Optional extra reviewers can be added for high-stakes work, but they do not replace the selected review-depth loop.
• Final signoff only happens after the selected post-fix review path and final deterministic gates prove the spec is complete, or a blocker artifact explains why it cannot be completed.
• Critical TypeScript rules:
• Check the project's package.json for "type": "module" — if ESM, use import; if CJS, use require(). In both cases, wrap execution in an async function instead of raw top-level await.
• agent-relay run <file.ts> executes the file as a standalone subprocess — it does NOT inspect exports. The file MUST call .run().
• Use .run({ cwd: process.cwd() }) — createWorkflowRenderer does not exist
• Validate with --dry-run before running: agent-relay run --dry-run workflow.ts

⚡ Parallelism — Design for Speed

Cross-Workflow Parallelism: Wave Planning

# BAD — sequential (14 hours for 27 workflows at ~30 min each)
agent-relay run workflows/34-sst-wiring.ts
agent-relay run workflows/35-env-config.ts
agent-relay run workflows/36-loading-states.ts
# ... one at a time

# GOOD — parallel waves (3-4 hours for 27 workflows)
# Wave 1: independent infra (parallel)
agent-relay run workflows/34-sst-wiring.ts &
agent-relay run workflows/35-env-config.ts &
agent-relay run workflows/36-loading-states.ts &
agent-relay run workflows/37-responsive.ts &
wait
git add -A && git commit -m "Wave 1"

# Wave 2: testing (parallel — independent test suites)
agent-relay run workflows/40-unit-tests.ts &
agent-relay run workflows/41-integration-tests.ts &
agent-relay run workflows/42-e2e-tests.ts &
wait
git add -A && git commit -m "Wave 2"

Declare File Scope for Planning

workflow('48-comparison-mode')
  .packages(['web', 'core'])                // monorepo packages touched
  .isolatedFrom(['49-feedback-system'])      // explicitly safe to parallelize
  .requiresBefore(['46-admin-dashboard'])    // explicit ordering constraint

Within-Workflow Parallelism

// BAD — unnecessary sequential chain
.step('fix-component-a', { agent: 'worker', dependsOn: ['review'] })
.step('fix-component-b', { agent: 'worker', dependsOn: ['fix-component-a'] })  // why wait?

// GOOD — parallel fan-out, merge at the end
.step('fix-component-a', { agent: 'impl-1', dependsOn: ['review'] })
.step('fix-component-b', { agent: 'impl-2', dependsOn: ['review'] })  // same dep = parallel
.step('verify-all', { agent: 'reviewer', dependsOn: ['fix-component-a', 'fix-component-b'] })

Failure Prevention

1. Do not use raw top-level await

async function runWorkflow() {
  const result = await workflow('my-workflow')
    // ...
    .run({ cwd: process.cwd() });

  console.log('Workflow status:', result.status);
}

runWorkflow().catch((error) => {
  console.error(error);
  process.exit(1);
});

2b. Standard preflight template for resumable workflows

.step('preflight', {
  type: 'deterministic',
  command: [
    'set -e',
    'BRANCH=$(git rev-parse --abbrev-ref HEAD)',
    'echo "branch: $BRANCH"',
    'if [ "$BRANCH" != "fix/your-branch-name" ]; then echo "ERROR: wrong branch"; exit 1; fi',
    // Files the workflow is allowed to find dirty on entry:
    //   - package-lock.json: npm install is idempotent and often touches it
    //   - every file the workflow's edit steps will rewrite: a prior partial
    //     run may have left them dirty, and the edit step will rewrite
    //     them cleanly before commit
    // Everything else is unexpected drift and must fail preflight.
    'ALLOWED_DIRTY="package-lock.json|path/to/file1\\\\.ts|path/to/file2\\\\.ts"',
    'DIRTY=$(git diff --name-only | grep -vE "^(${ALLOWED_DIRTY})$" || true)',
    'if [ -n "$DIRTY" ]; then echo "ERROR: unexpected tracked drift:"; echo "$DIRTY"; exit 1; fi',
    'if ! git diff --cached --quiet; then echo "ERROR: staging area is dirty"; git diff --cached --stat; exit 1; fi',
    'gh auth status >/dev/null 2>&1 || (echo "ERROR: gh CLI not authenticated"; exit 1)',
    'echo PREFLIGHT_OK',
  ].join(' && '),
  captureOutput: true,
  failOnError: true,
}),

2c. Picking the right .join() for multi-line shell commands

command: [
  'set -e',
  'HITS=$(grep -c diag src/cli/commands/setup.ts || true)',
  'if [ "$HITS" -lt 6 ]; then echo "FAIL"; exit 1; fi',
  'echo OK',
].join(' && '),

3. Keep final verification boring and deterministic

grep -Eq "foo|bar|baz" file.ts

6. Be explicit about shell requirements

/opt/homebrew/bin/bash workflows/your-workflow/execute.sh --wave 2

9. Factor repo-specific setup into a shared helper

// workflows/lib/cloud-repo-setup.ts
export interface CloudRepoSetupOptions {
  branch: string;
  committerName?: string;
  extraSetupCommands?: string[];
  skipWorkspaceBuild?: boolean;
}

export function applyCloudRepoSetup<T>(wf: T, opts: CloudRepoSetupOptions): T {
  // adds two steps: setup-branch, install-deps
  // install-deps runs: npm install + workspace prebuilds (build:platform, build:core, etc.)
  // ...
}

End-to-End Bug Fix Workflows

• Capture the original failure
• Reproduce the bug first in a deterministic or evidence-capturing step
• Save exact commands, logs, status codes, or screenshots/artifacts
• State the acceptance contract
• Define the exact end-to-end success criteria before implementation
• Include the real entrypoint a user would run
• Implement the fix
• Rebuild / reinstall from scratch
• Do not trust dirty local state
• Prefer a clean environment when install/bootstrap behavior is involved
• Run targeted regression checks
• Unit/integration tests are helpful but not sufficient by themselves
• Run a full end-to-end validation
• Use the real CLI / API / install path
• Prefer a clean environment (Docker, sandbox, cloud workspace, Daytona, etc.) for install/runtime issues
• Compare before vs after evidence
• Show that the original failure no longer occurs
• Record residual risks
• Call out what was not covered
• Ship the result as a PR
• Open the pull request from the workflow itself with createGitHubStep from @agent-relay/sdk — never gh pr create, never id: inside the config, never action: 'createPullRequest', never separate owner/repo fields
• See Shipping the Result — Open a PR via createGitHubStep below
• A workflow that fixes a bug and stops short of the PR has only done half the loop
• disposable sandbox / cloud workspace
• Docker / containerized environment
• fresh local shell with isolated paths
• compares candidate validation environments
• defines the acceptance contract
• chooses the best swarm pattern
• then authors the final fix/validation workflow

Shipping the Result — Open a PR via createGitHubStep

The minimal "open a PR" recipe

import { workflow } from '@agent-relay/sdk/workflows';
import { createGitHubStep } from '@agent-relay/sdk';

const REPO = 'AgentWorkforce/cloud';
const BRANCH = `agent-relay/run-${Date.now()}`;

async function runWorkflow() {
  await workflow('feature-x')
    // ... your real implementation, repair, review loops, and final acceptance ...
    .step('write-marker', {
      type: 'deterministic',
      command: `echo "fix landed at $(date -u)" >> CHANGELOG.md`,
    })

    // Branch off main on the remote.
    .step('create-branch', createGitHubStep({
      name: 'create-branch',
      dependsOn: ['write-marker'],
      action: 'createBranch',
      repo: REPO,
      params: { branch: BRANCH, fromBranch: 'main' },
    }))

    // Commit the change to the branch via Contents API.
    .step('commit-change', createGitHubStep({
      name: 'commit-change',
      dependsOn: ['create-branch'],
      action: 'createFile',
      repo: REPO,
      params: {
        path: 'CHANGELOG.md',
        branch: BRANCH,
        content: '<file body here>',
        message: 'chore: changelog entry',
      },
    }))

    // Open the PR. This is the load-bearing step.
    .step('open-pr', createGitHubStep({
      name: 'open-pr',
      dependsOn: ['commit-change'],
      action: 'createPR',
      repo: REPO,
      params: {
        title: 'feat: ship feature X',
        head: BRANCH,
        base: 'main',
        body: '## Summary\n\n- ...\n\n## Test plan\n\n- [x] ...',
        draft: false,
      },
      output: { mode: 'data', format: 'json', path: 'html_url' },
    }))

    .run({ cwd: process.cwd() });
}

runWorkflow().catch((error) => {
  console.error(error);
  process.exit(1);
});

Key Concepts

Verification Gates

verification: { type: 'exit_code' }                        // preferred for code-editing steps
verification: { type: 'output_contains', value: 'DONE' }   // optional accelerator
verification: { type: 'file_exists', value: 'src/out.ts' } // deterministic file check
verification: { type: 'pr_url', value: 'owner/repo' }      // step must leave behind a PR

DAG Dependencies

.step('fix-types',  { agent: 'worker', dependsOn: ['review'], ... })
.step('fix-tests',  { agent: 'worker', dependsOn: ['review'], ... })
.step('final',      { agent: 'lead',   dependsOn: ['fix-types', 'fix-tests'], ... })

SDK API

// Subscribe an agent to additional channels post-spawn
relay.subscribe({ agent: 'security-auditor', channels: ['review-pr-456'] });

// Unsubscribe — agent leaves the channel entirely
relay.unsubscribe({ agent: 'security-auditor', channels: ['general'] });

// Mute — agent stays subscribed (history access) but messages are NOT injected into PTY
relay.mute({ agent: 'security-auditor', channel: 'review-pr-123' });

// Unmute — resume PTY injection
relay.unmute({ agent: 'security-auditor', channel: 'review-pr-123' });

Events

relay.onChannelSubscribed = (agent, channels) => { /* ... */ };
relay.onChannelUnsubscribed = (agent, channels) => { /* ... */ };
relay.onChannelMuted = (agent, channel) => { /* ... */ };
relay.onChannelUnmuted = (agent, channel) => { /* ... */ };

Agent Definition

```typescript

.agent('name', {
  cli: 'claude' | 'codex' | 'gemini' | 'aider' | 'goose' | 'opencode' | 'droid',
  role?: string,
  preset?: 'lead' | 'worker' | 'reviewer' | 'analyst',
  retries?: number,
  model?: string,
  interactive?: boolean, // default: true
})

Model Constants

import { ClaudeModels, CodexModels, GeminiModels } from '@agent-relay/config';

.agent('planner', { cli: 'claude', model: ClaudeModels.OPUS })    // not 'opus'
.agent('worker',  { cli: 'claude', model: ClaudeModels.SONNET })  // not 'sonnet'
.agent('coder',   { cli: 'codex',  model: CodexModels.GPT_5_4 })  // not 'gpt-5.4'

Step Definition

Agent Steps

.step('name', {
  agent: string,
  task: string,                   // supports {{var}} and {{steps.NAME.output}}
  dependsOn?: string[],
  verification?: VerificationCheck,
  retries?: number,
})

Deterministic Steps (Shell Commands)

.step('verify-files', {
  type: 'deterministic',
  command: 'test -f src/auth.ts && echo "FILE_EXISTS"',
  dependsOn: ['implement'],
  captureOutput: true,
  failOnError: false,
})
.step('repair-files', {
  agent: 'worker',
  dependsOn: ['verify-files'],
  task: `If verify-files failed, create or fix the missing file and rerun the check.
Output:
{{steps.verify-files.output}}`,
  verification: { type: 'exit_code' },
})
.step('verify-files-final', {
  type: 'deterministic',
  command: 'test -f src/auth.ts && echo "FILE_EXISTS"',
  dependsOn: ['repair-files'],
  captureOutput: true,
  failOnError: true,
})

Common Patterns

Deep-Tier Claude-Then-Codex Review/Fix Loops

.agent('claude-reviewer', {
  cli: 'claude',
  preset: 'reviewer',
  role: 'First-pass fresh-eyes reviewer. Reads actual files, diffs, rules, and evidence from scratch.',
  retries: 1,
})
.agent('claude-fixer', {
  cli: 'claude',
  role: 'Fixer for valid Claude review findings. Adds or updates tests/proofs for each fix.',
  retries: 2,
})
.agent('codex-reviewer', {
  cli: 'codex',
  preset: 'reviewer',
  role: 'Second-pass fresh-eyes reviewer. Reviews the post-Claude-fix state from scratch.',
  retries: 1,
})
.agent('codex-fixer', {
  cli: 'codex',
  role: 'Fixer for valid Codex review findings. Adds or updates tests/proofs for each fix.',
  retries: 2,
})

.step('claude-review', {
  agent: 'claude-reviewer',
  dependsOn: ['verify-final'],
  task: `First-pass fresh-eyes review.
Read the task spec, AGENTS.md / CLAUDE.md, changed files, final diff, artifacts, and verification evidence:
{{steps.verify-final.output}}

Write .workflow-artifacts/<workflow>/claude-review.md.
Use actionable findings with file paths, severity, and required fixes.
If there are no issues, write NO_ISSUES_FOUND.`,
  verification: { type: 'exit_code' },
})
.step('claude-fix', {
  agent: 'claude-fixer',
  dependsOn: ['claude-review'],
  task: `Read .workflow-artifacts/<workflow>/claude-review.md.
If it contains findings, fix every valid issue and add or update appropriate tests/proofs. After each fix, rerun targeted checks and review the touched files again.
Keep iterating locally until this round has no remaining valid issues.
Write .workflow-artifacts/<workflow>/claude-fix.md with fixes and commands run.
If the review says NO_ISSUES_FOUND, record that no fix was needed.`,
  verification: { type: 'exit_code' },
})
.step('claude-review-final', {
  agent: 'claude-reviewer',
  dependsOn: ['claude-fix'],
  task: `Review the post-Claude-fix state from scratch. Do not rely on prior review text or fixer summaries.
Read the files, diff, rules, spec, and evidence. Write .workflow-artifacts/<workflow>/claude-review-final.md.
Use NO_ISSUES_FOUND only if there are no actionable issues left.`,
  verification: { type: 'exit_code' },
})
.step('claude-fix-final', {
  agent: 'claude-fixer',
  dependsOn: ['claude-review-final'],
  task: `If the final Claude review contains findings, fix them, add or update appropriate tests/proofs, rerun relevant checks, and write .workflow-artifacts/<workflow>/claude-fix-final.md.
If a finding cannot be fixed, write .workflow-artifacts/<workflow>/BLOCKED_NO_COMMIT.md with exact evidence.
If the final review says NO_ISSUES_FOUND, write .workflow-artifacts/<workflow>/claude-signoff.md.`,
  verification: { type: 'exit_code' },
})
.step('verify-after-claude-review', {
  type: 'deterministic',
  dependsOn: ['claude-fix-final'],
  command: 'test ! -f .workflow-artifacts/<workflow>/BLOCKED_NO_COMMIT.md && npm run typecheck && npm test 2>&1',
  captureOutput: true,
  failOnError: false,
})
.step('codex-review', {
  agent: 'codex-reviewer',
  dependsOn: ['verify-after-claude-review'],
  task: `Second-pass fresh-eyes review of the post-Claude-fix state.
Read the task spec, AGENTS.md / CLAUDE.md, changed files, final diff, artifacts, and verification evidence:
{{steps.verify-after-claude-review.output}}

Write .workflow-artifacts/<workflow>/codex-review.md.
Use actionable findings with file paths, severity, and required fixes.
If there are no issues, write NO_ISSUES_FOUND.`,
  verification: { type: 'exit_code' },
})
.step('codex-fix', {
  agent: 'codex-fixer',
  dependsOn: ['codex-review'],
  task: `Read .workflow-artifacts/<workflow>/codex-review.md.
If it contains findings, fix every valid issue and add or update appropriate tests/proofs. After each fix, rerun targeted checks and review the touched files again.
Keep iterating locally until this round has no remaining valid issues.
Write .workflow-artifacts/<workflow>/codex-fix.md with fixes and commands run.
If the review says NO_ISSUES_FOUND, record that no fix was needed.`,
  verification: { type: 'exit_code' },
})
.step('codex-review-final', {
  agent: 'codex-reviewer',
  dependsOn: ['codex-fix'],
  task: `Review the post-fix state from scratch. Do not rely on prior review text or fixer summaries.
Read the files, diff, rules, spec, and evidence. Write .workflow-artifacts/<workflow>/codex-review-final.md.
Use NO_ISSUES_FOUND only if there are no actionable issues left.`,
  verification: { type: 'exit_code' },
})
.step('codex-fix-final', {
  agent: 'codex-fixer',
  dependsOn: ['codex-review-final'],
  task: `If the final review contains findings, fix them, add or update appropriate tests/proofs, rerun relevant checks, and write .workflow-artifacts/<workflow>/codex-fix-final.md.
If a finding cannot be fixed, write .workflow-artifacts/<workflow>/BLOCKED_NO_COMMIT.md with exact evidence.
If the final review says NO_ISSUES_FOUND, write .workflow-artifacts/<workflow>/codex-signoff.md.`,
  verification: { type: 'exit_code' },
})
.step('acceptance-after-codex-review', {
  type: 'deterministic',
  dependsOn: ['codex-fix-final'],
  command: 'test ! -f .workflow-artifacts/<workflow>/BLOCKED_NO_COMMIT.md && npm run typecheck && npm test 2>&1',
  captureOutput: true,
  failOnError: true,
})

Interactive Team (lead + workers on shared channel)

.agent('lead', {
  cli: 'claude',
  model: ClaudeModels.OPUS,
  role: 'Architect and reviewer — assigns work, reviews, posts feedback',
  retries: 1,
  // No preset — interactive by default
})

.agent('impl-new', {
  cli: 'codex',
  model: CodexModels.GPT_5_4,
  role: 'Creates new files. Listens on channel for assignments and feedback.',
  retries: 2,
  // No preset — interactive, receives channel messages
})

.agent('impl-modify', {
  cli: 'codex',
  model: CodexModels.GPT_5_4,
  role: 'Edits existing files. Listens on channel for assignments and feedback.',
  retries: 2,
})

// All three share the same dependsOn — they start concurrently (no deadlock)
.step('lead-coordinate', {
  agent: 'lead',
  dependsOn: ['context'],
  task: `You are the lead on #channel. Workers: impl-new, impl-modify.
Post the plan. Assign files. Review their work. Post feedback if needed.
Workers iterate based on your feedback. Exit when all files are correct.`,
})
.step('impl-new-work', {
  agent: 'impl-new',
  dependsOn: ['context'],   // same dep as lead = parallel start
  task: `You are impl-new on #channel. Wait for the lead's plan.
Create files as assigned. Report completion. Fix issues from feedback.`,
})
.step('impl-modify-work', {
  agent: 'impl-modify',
  dependsOn: ['context'],   // same dep as lead = parallel start
  task: `You are impl-modify on #channel. Wait for the lead's plan.
Edit files as assigned. Report completion. Fix issues from feedback.`,
})
// Downstream gates on lead (lead exits when satisfied)
.step('verify', { type: 'deterministic', dependsOn: ['lead-coordinate'], ... })

1. Question / Answer (blocking ask)

.step('integrate', {
  agent: 'integrator',
  dependsOn: ['context'],
  task: `You are the integrator on #wf-feature.
Before writing code, post a direct question to @schema-owner asking which
table owns the new field. Do NOT proceed until @schema-owner replies in
channel. If no reply arrives in 5 minutes, @-mention the lead.`,
})

2. Broadcast / Ack

.step('lead-coordinate', {
  agent: 'lead',
  dependsOn: ['context'],
  task: `Post the plan to #wf-feature, then @impl-a @impl-b @impl-c.
Wait for each to reply with "ACK <agent-name>" before issuing assignments.
If any worker hasn't acked in 3 minutes, re-post and ping again.
Only after all three have acked, post per-worker assignments.`,
})

3. Peer Review Handoff

.step('impl-a-work', {
  agent: 'impl-a',
  dependsOn: ['context'],
  task: `Implement src/foo.ts per the lead's assignment.
When done, post to #wf-feature: "@reviewer ready: src/foo.ts" — include the
commit SHA. Then wait for @reviewer's verdict in channel.
- If "APPROVED", you're done.
- If "CHANGES_REQUESTED <notes>", apply the notes and re-post.
- If no verdict in 5 min, @-mention the lead.`,
})

4. Standup / Status Probe

.step('lead-coordinate', {
  agent: 'lead',
  task: `... coordinate the team ...

Every 10 minutes, post a status probe: "@impl-a @impl-b status?"
Each worker should reply with one of:
  - "RUNNING <step>" (still working)
  - "BLOCKED <reason>" (@-mention the lead with the blocker)
  - "DONE <artifact>" (ready for review)

If a worker is silent for two probes in a row, mark them stalled and
reassign their work to a peer.`,
})

5. Hand-Off with Context

.step('impl-a-work', {
  agent: 'impl-a',
  task: `... finish your part ...

When done, post a handoff to #wf-feature targeting the next worker:
"@impl-b HANDOFF: src/foo.ts ready. Touched: <files>. Open question: <if any>.
Tests: <pass/fail summary>. Commit: <sha>."`,
})

Pipeline (sequential handoff)

.pattern('pipeline')
.step('analyze', { agent: 'analyst', task: '...' })
.step('implement', { agent: 'dev', task: '{{steps.analyze.output}}', dependsOn: ['analyze'] })
.step('test', { agent: 'tester', task: '{{steps.implement.output}}', dependsOn: ['implement'] })

Error Handling

.onError('fail-fast')   // stop on first failure (default)
.onError('continue')    // skip failed branches, continue others
.onError('retry', { maxRetries: 3, retryDelayMs: 5000 })

Multi-File Edit Pattern

When a workflow needs to modify multiple existing files, use one agent step per file with a deterministic verify gate after each. Agents reliably edit 1-2 files per step but fail on 4+.

steps:
  - name: read-types
    type: deterministic
    command: cat src/types.ts
    captureOutput: true

  - name: edit-types
    agent: dev
    dependsOn: [read-types]
    task: |
      Edit src/types.ts. Current contents:
      {{steps.read-types.output}}
      Add 'pending' to the Status union type.
      Only edit this one file.
    verification:
      type: exit_code

  - name: verify-types
    type: deterministic
    dependsOn: [edit-types]
    command: 'if git diff --quiet src/types.ts; then echo "NOT MODIFIED"; exit 1; fi; echo "OK"'
    captureOutput: true
    failOnError: false

  - name: fix-types-verification
    agent: dev
    dependsOn: [verify-types]
    task: |
      If verify-types failed, fix src/types.ts and rerun the verify command.
      Output:
      {{steps.verify-types.output}}
    verification:
      type: exit_code

  - name: verify-types-final
    type: deterministic
    dependsOn: [fix-types-verification]
    command: 'if git diff --quiet src/types.ts; then echo "NOT MODIFIED"; exit 1; fi; echo "OK"'
    captureOutput: true
    failOnError: true

  - name: read-service
    type: deterministic
    dependsOn: [verify-types-final]
    command: cat src/service.ts
    captureOutput: true

  - name: edit-service
    agent: dev
    dependsOn: [read-service]
    task: |
      Edit src/service.ts. Current contents:
      {{steps.read-service.output}}
      Add a handlePending() method.
      Only edit this one file.
    verification:
      type: exit_code

  - name: verify-service
    type: deterministic
    dependsOn: [edit-service]
    command: 'if git diff --quiet src/service.ts; then echo "NOT MODIFIED"; exit 1; fi; echo "OK"'
    captureOutput: true
    failOnError: false

  - name: fix-service-verification
    agent: dev
    dependsOn: [verify-service]
    task: |
      If verify-service failed, fix src/service.ts and rerun the verify command.
      Output:
      {{steps.verify-service.output}}
    verification:
      type: exit_code

  - name: verify-service-final
    type: deterministic
    dependsOn: [fix-service-verification]
    command: 'if git diff --quiet src/service.ts; then echo "NOT MODIFIED"; exit 1; fi; echo "OK"'
    captureOutput: true
    failOnError: true

  # Deterministic commit — never rely on agents to commit
  - name: commit
    type: deterministic
    dependsOn: [verify-service-final]
    command: npm run typecheck && npm test && git add src/types.ts src/service.ts && git commit -m "feat: add pending status"
    captureOutput: true
    failOnError: false

  - name: repair-commit
    agent: dev
    dependsOn: [commit]
    task: |
      If commit failed, fix the blocker, rerun npm run typecheck && npm test, and create the commit.
      If commit passed, confirm the commit subject.
      Output:
      {{steps.commit.output}}
    verification:
      type: exit_code

  - name: verify-commit-created
    type: deterministic
    dependsOn: [repair-commit]
    command: 'git log -1 --pretty=%s | grep -q "^feat: add pending status$" && echo "COMMIT_OK" || (echo "COMMIT_MISSING"; exit 1)'
    captureOutput: true
    failOnError: true

File Materialization: Verify Before Proceeding

After any step that creates files, add a deterministic file_exists check before proceeding. Non-interactive agents may exit 0 without writing anything (wrong cwd, stdout instead of disk).

- name: verify-files
  type: deterministic
  dependsOn: [impl-auth, impl-storage]
  command: |
    missing=0
    for f in src/auth/credentials.ts src/storage/client.ts; do
      if [ ! -f "$f" ]; then echo "MISSING: $f"; missing=$((missing+1)); fi
    done
    if [ $missing -gt 0 ]; then echo "$missing files missing"; exit 1; fi
    echo "All files present"
  captureOutput: true
  failOnError: false

- name: fix-missing-files
  agent: impl-auth
  dependsOn: [verify-files]
  task: |
    If verify-files found missing files, create/fix them and rerun the check.
    Output:
    {{steps.verify-files.output}}
  verification:
    type: exit_code

- name: verify-files-final
  type: deterministic
  dependsOn: [fix-missing-files]
  command: |
    missing=0
    for f in src/auth/credentials.ts src/storage/client.ts; do
      if [ ! -f "$f" ]; then echo "MISSING: $f"; missing=$((missing+1)); fi
    done
    if [ $missing -gt 0 ]; then echo "$missing files missing"; exit 1; fi
    echo "All files present"
  captureOutput: true
  failOnError: true

Edit Gates Must See Untracked Files

- name: provider-edit-gate-capture
  type: deterministic
  dependsOn: [implement-providers]
  command: |
    if [ -z "$(git status --short -- packages/new-provider .workflow-artifacts/my-flow)" ]; then
      echo "NO_PROVIDER_CHANGES"
      exit 1
    fi
    echo "PROVIDER_EDIT_GATE_OK"
  captureOutput: true
  failOnError: false

- name: repair-edit-gate
  agent: provider-worker
  dependsOn: [provider-edit-gate-capture]
  task: |
    If provider-edit-gate-capture reported NO_PROVIDER_CHANGES, inspect git
    status including untracked files and add the missing provider artifacts.
    If it already passed, do nothing.
  verification:
    type: exit_code

- name: provider-edit-gate-final
  type: deterministic
  dependsOn: [repair-edit-gate]
  command: |
    if [ -z "$(git status --short -- packages/new-provider .workflow-artifacts/my-flow)" ]; then
      echo "NO_PROVIDER_CHANGES"
      exit 1
    fi
    echo "PROVIDER_EDIT_GATE_FINAL_OK"
  captureOutput: true
  failOnError: false

- name: repair-provider-edit-gate-final
  agent: provider-worker
  dependsOn: [provider-edit-gate-final]
  task: |
    If provider-edit-gate-final is still red, repair the missing provider
    artifacts and rerun the check. If repair is impossible, write
    .workflow-artifacts/my-flow/BLOCKED_NO_COMMIT.md with exact evidence and
    do not commit.
    Output:
    {{steps.provider-edit-gate-final.output}}
  verification:
    type: exit_code

Agent Transport Must Not Be The First Hard Gate

Interactive lead-and-worker teams are useful, but they are still process

.step('runtime-implementation', {
  agent: 'impl-runtime',
  dependsOn: ['context'],
  task: 'Implement the runtime slice and write .workflow-artifacts/runtime.md',
  failOnError: false,   // transport failure is advisory, not a hard gate
})
.step('adapter-implementation', {
  agent: 'impl-adapters',
  dependsOn: ['context'],
  task: 'Implement adapter wiring and write .workflow-artifacts/adapters.md',
  failOnError: false,   // transport failure is advisory, not a hard gate
})
.step('implementation-reconcile', {
  type: 'deterministic',
  // Depend on the agent steps so reconcile runs AFTER they finish (not in
  // parallel via a shared 'context' dep). They are failOnError:false above,
  // so a transport failure stays advisory while ordering is preserved.
  dependsOn: ['runtime-implementation', 'adapter-implementation'],
  command: `git status --short -- packages/core packages/*/src/writeback.ts scripts tests .workflow-artifacts
test -f scripts/verify-e2e.mjs || echo "MISSING_E2E"
test -f packages/core/src/runtime/router.ts || echo "MISSING_ROUTER"`,
  captureOutput: true,
  failOnError: false,
})
.step('repair-implementation-reconcile', {
  agent: 'qa',
  dependsOn: ['implementation-reconcile'],
  task: `Finish anything missing before gates run:\n{{steps.implementation-reconcile.output}}`,
  verification: { type: 'exit_code' },
})
.step('run-e2e', {
  type: 'deterministic',
  dependsOn: ['repair-implementation-reconcile'],
  command: 'npm run verify:e2e',
  captureOutput: true,
  failOnError: false,
})

DAG Deadlock Anti-Pattern

```yaml

# WRONG — deadlock: coordinate depends on context, work-a depends on coordinate
steps:
  - name: coordinate
    dependsOn: [context]    # lead waits for WORKER_DONE...
  - name: work-a
    dependsOn: [coordinate] # ...but work-a can't start until coordinate finishes

# RIGHT — workers and lead start in parallel
steps:
  - name: context
    type: deterministic
  - name: work-a
    dependsOn: [context]    # starts with lead
  - name: coordinate
    dependsOn: [context]    # starts with workers
  - name: merge
    dependsOn: [work-a, coordinate]

Step Sizing

One agent, one deliverable. A step's task prompt should be 10-20 lines max.

# Team pattern: lead + workers on a shared channel
steps:
  - name: track-lead-coord
    agent: track-lead
    dependsOn: [prior-step]
    task: |
      Lead the track on #my-track. Workers: track-worker-1, track-worker-2.
      Post assignments to the channel. Review worker output.

  - name: track-worker-1-impl
    agent: track-worker-1
    dependsOn: [prior-step]  # same dep as lead — starts concurrently
    task: |
      Join #my-track. track-lead will post your assignment.
      Implement the file as directed.
    verification:
      type: exit_code

  - name: next-step
    dependsOn: [track-lead-coord]  # downstream depends on lead, not workers

Supervisor Pattern

When you set .pattern('supervisor') (or hub-spoke, fan-out), the runner auto-assigns a supervisor agent as owner for worker steps. The supervisor monitors progress, nudges idle workers, and issues OWNER_DECISION.

Auto-hardening only activates for hub patterns — not pipeline or dag.

Use case	Pattern	Why
Sequential, no monitoring	pipeline	Simple, no overhead
Workers need oversight	supervisor	Auto-owner monitors
Local/small models	supervisor	Supervisor catches stuck workers
All non-interactive	pipeline or dag	No PTY = no supervision needed

Concurrency

Cap maxConcurrency at 4-6. Spawning 10+ agents simultaneously causes broker timeouts.

Parallel agents	maxConcurrency
2-4	4 (default safe)
5-10	5
10+	6-8 max

Common Mistakes

Mistake	Fix
Treating relay as transport, not as a coordination layer (every step is preset: 'worker', every handoff is {{steps.X.output}})	Default to Conversation shape for non-trivial work — interactive agents on a shared channel. Pipeline-shape is only correct when the work could be expressed as a bash | bash | bash pipe.
Interactive agents on a channel whose task strings don't tell them to talk to each other	Pick a Chat-Native Coordination Recipe (Q/A, Broadcast/Ack, Peer Review, Standup, Hand-Off) and bake it into the task prompt — otherwise you're paying for a chat substrate you're not using
All workflows run sequentially	Group independent workflows into parallel waves (4-7x speedup)
Every step depends on the previous one	Only add dependsOn when there's a real data dependency
Self-review step with no timeout	Set timeout: 300_000 (5 min) — Codex hangs in non-interactive review
One giant workflow per feature	Split into smaller workflows that can run in parallel waves
Adding exit instructions to tasks	Runner handles self-termination automatically
Interactive PTY Codex for one-shot artifact steps	Use preset: 'worker' plus file_exists or custom verification
Setting timeoutMs on agents/steps	Use global .timeout() only
Using general channel	Set .channel('wf-name') for isolation
{{steps.X.output}} without dependsOn: ['X']	Output won't be available yet
Requiring exact sentinel as only completion gate	Use exit_code or file_exists verification
Writing 100-line task prompts	Split into lead + workers on a channel
maxConcurrency: 16 with many parallel steps	Cap at 5-6
Non-interactive agent reading large files via tools

YAML Alternative

```yaml

version: '1.0'
name: my-workflow
swarm:
  pattern: dag
  channel: wf-my-workflow
agents:
  - name: lead
    cli: claude
    role: Architect
  - name: worker
    cli: codex
    role: Implementer
  - name: claude-reviewer
    cli: claude
    preset: reviewer
    role: First-pass fresh-eyes reviewer
  - name: claude-fixer
    cli: claude
    role: First-pass review fixer
  - name: codex-reviewer
    cli: codex
    preset: reviewer
    role: Second-pass fresh-eyes reviewer
  - name: codex-fixer
    cli: codex
    role: Second-pass review fixer
workflows:
  - name: default
    steps:
      - name: plan
        agent: lead
        task: 'Produce a detailed implementation plan.'
      - name: implement
        agent: worker
        task: 'Implement: {{steps.plan.output}}'
        dependsOn: [plan]
        verification:
          type: exit_code
      - name: claude-review
        agent: claude-reviewer
        dependsOn: [implement]
        task: 'Review actual files, diff, rules, and evidence. Write .workflow-artifacts/my-workflow/claude-review.md with findings or NO_ISSUES_FOUND.'
      - name: claude-fix
        agent: claude-fixer
        dependsOn: [claude-review]
        task: 'Fix valid Claude review findings, add or update appropriate tests/proofs, rerun relevant checks, and write .workflow-artifacts/my-workflow/claude-fix.md.'
      - name: claude-review-final
        agent: claude-reviewer
        dependsOn: [claude-fix]
        task: 'Review the post-Claude-fix state from scratch and write .workflow-artifacts/my-workflow/claude-review-final.md.'
      - name: claude-fix-final
        agent: claude-fixer
        dependsOn: [claude-review-final]
        task: 'Fix remaining Claude findings, add/update tests or proofs, or write .workflow-artifacts/my-workflow/BLOCKED_NO_COMMIT.md.'
      - name: codex-review
        agent: codex-reviewer
        dependsOn: [claude-fix-final]
        task: 'Review the post-Claude-fix state from scratch. Write .workflow-artifacts/my-workflow/codex-review.md with findings or NO_ISSUES_FOUND.'
      - name: codex-fix
        agent: codex-fixer
        dependsOn: [codex-review]
        task: 'Fix valid Codex review findings, add or update appropriate tests/proofs, rerun relevant checks, and write .workflow-artifacts/my-workflow/codex-fix.md.'
      - name: codex-review-final
        agent: codex-reviewer
        dependsOn: [codex-fix]
        task: 'Review the post-Codex-fix state from scratch and write .workflow-artifacts/my-workflow/codex-review-final.md.'
      - name: codex-fix-final
        agent: codex-fixer
        dependsOn: [codex-review-final]
        task: 'Fix remaining Codex findings, add/update tests or proofs, or write .workflow-artifacts/my-workflow/BLOCKED_NO_COMMIT.md.'
      - name: acceptance-after-review
        type: deterministic
        dependsOn: [codex-fix-final]
        command: 'test ! -f .workflow-artifacts/my-workflow/BLOCKED_NO_COMMIT.md && echo ACCEPTANCE_OK'
        captureOutput: true
        failOnError: true

Available Swarm Patterns

dag (default), fan-out, pipeline, hub-spoke, consensus, mesh, handoff, cascade, debate, hierarchical, map-reduce, scatter-gather, supervisor, reflection, red-team, verifier, auction, escalation, saga, circuit-breaker, blackboard, swarm

See skill choosing-swarm-patterns for pattern selection guidance.