---
title: "Ghost: Worktree Feature Workflow"
description: "Example from scripts/worktree-feature/ — A production multi-agent pipeline that discovers tickets from a PRD, implements them with Claude/Codex, validates, reviews in parallel, and generates reports."
---

# scripts/worktree-feature/ — Full Pipeline

<Note>
**Ghost doc** — Real production workflow at `scripts/worktree-feature/`. The most complex Smithers example: multiple CLI agents (Claude Code, OpenAI Codex) through a full development lifecycle.
</Note>

## Pipeline

1. **Discover** — Read PRD, break into ordered independent tickets
2. **Implement** — Write code end-to-end per ticket
3. **Validate** — Run `bun test`
4. **Review** — Claude + Codex review in parallel
5. **ReviewFix** — Address review issues
6. **Report** — Generate final report

Steps 2--5 loop via `<Loop>` until both reviewers approve or max iterations reached.

## Schema Setup — smithers.ts

```tsx
// scripts/worktree-feature/smithers.ts
import { createSmithers } from "smithers-orchestrator";
import { z } from "zod";

// Each pipeline stage gets its own Zod output schema
const DiscoverOutput = z.object({
  tickets: z.array(z.object({
    id: z.string(),
    title: z.string(),
    description: z.string(),
    acceptanceCriteria: z.array(z.string()),
    filesToModify: z.array(z.string()),
    filesToCreate: z.array(z.string()),
    dependencies: z.array(z.string()).nullable(),
  })),
  reasoning: z.string(),
});

const ImplementOutput = z.object({
  filesCreated: z.array(z.string()).nullable(),
  filesModified: z.array(z.string()).nullable(),
  whatWasDone: z.string(),
  allTestsPassing: z.boolean(),
  testOutput: z.string(),
});

const ValidateOutput = z.object({
  allPassed: z.boolean(),
  failingSummary: z.string().nullable(),
});

const ReviewOutput = z.object({
  reviewer: z.string(),
  approved: z.boolean(),
  issues: z.array(z.object({
    severity: z.enum(["critical", "major", "minor", "nit"]),
    file: z.string(),
    line: z.number().nullable(),
    description: z.string(),
    suggestion: z.string().nullable(),
  })),
  feedback: z.string(),
});

const ReviewFixOutput = z.object({
  fixesMade: z.array(z.object({ issue: z.string(), fix: z.string(), file: z.string() })),
  allIssuesResolved: z.boolean(),
  summary: z.string(),
});

const ReportOutput = z.object({
  ticketTitle: z.string(),
  status: z.enum(["completed", "partial", "failed"]),
  summary: z.string(),
  filesChanged: z.number(),
  reviewRounds: z.number(),
});

export const { Workflow, Task, useCtx, smithers, tables, outputs } = createSmithers({
  discover: DiscoverOutput,
  implement: ImplementOutput,
  validate: ValidateOutput,
  review: ReviewOutput,
  reviewFix: ReviewFixOutput,
  report: ReportOutput,
}, {
  dbPath: `${process.env.HOME}/.cache/smithers/worktree-feature.db`,
  journalMode: "DELETE",
});
```

## Entry Point — workflow.tsx

```tsx
// scripts/worktree-feature/workflow.tsx
import { Sequence, Branch } from "smithers-orchestrator";
import { Discover, TicketPipeline } from "./components";
import { Workflow, smithers, outputs } from "./smithers";

export default smithers((ctx) => {
  const discoverOutput = ctx.latest("discover", "discover-codex");
  const tickets = discoverOutput?.tickets ?? [];
  const unfinishedTickets = tickets.filter(
    (t: any) => !ctx.latest("report", `${t.id}:report`)
  );

  return (
    <Workflow name="worktree-feature">
      <Sequence>
        <Branch if={tickets.length === 0} then={<Discover />} />
        {unfinishedTickets.map((ticket: any) => (
          <TicketPipeline key={ticket.id} ticket={ticket} />
        ))}
      </Sequence>
    </Workflow>
  );
});
```

## Agents — agents.ts

```tsx
// scripts/worktree-feature/agents.ts
import { ToolLoopAgent as Agent, stepCountIs } from "ai";
import { anthropic } from "@ai-sdk/anthropic";
import { openai } from "@ai-sdk/openai";
import { ClaudeCodeAgent, CodexAgent } from "smithers-orchestrator";
import { SYSTEM_PROMPT } from "./system-prompt";

const USE_CLI = process.env.USE_CLI_AGENTS !== "0";
const UNSAFE = process.env.SMITHERS_UNSAFE === "1";

// Claude — switches between API agent and CLI agent
const claudeApi = new Agent({
  model: anthropic("claude-opus-4-6"),
  instructions: SYSTEM_PROMPT,
  stopWhen: stepCountIs(100),
});

const claudeCli = new ClaudeCodeAgent({
  model: "claude-opus-4-6",
  systemPrompt: SYSTEM_PROMPT,
  dangerouslySkipPermissions: UNSAFE,
  timeoutMs: 30 * 60 * 1000,
});

export const claude = USE_CLI ? claudeCli : claudeApi;

// Codex — CLI agent (CodexAgent does not have an API mode)
export const codex = new CodexAgent({
  model: "gpt-5.3-codex",
  systemPrompt: SYSTEM_PROMPT,
  yolo: UNSAFE,
  timeoutMs: 30 * 60 * 1000,
});
```

## Validation Loop — ValidationLoop.tsx

```tsx
// scripts/worktree-feature/components/ValidationLoop.tsx
import { Loop, Sequence } from "smithers-orchestrator";
import { Implement } from "./Implement";
import { Validate } from "./Validate";
import { Review } from "./Review";
import { ReviewFix } from "./ReviewFix";
import { useCtx } from "../smithers";

const MAX_REVIEW_ROUNDS = 3;

export function ValidationLoop({ ticket }: { ticket: { id: string } }) {
  const ctx = useCtx();
  const ticketId = ticket.id;

  const claudeReview = ctx.latest("review", `${ticketId}:review-claude`);
  const codexReview = ctx.latest("review", `${ticketId}:review-codex`);

  const allApproved = !!claudeReview?.approved && !!codexReview?.approved;

  return (
    <Loop
      id={`${ticketId}:impl-review-loop`}
      until={allApproved}
      maxIterations={MAX_REVIEW_ROUNDS}
      onMaxReached="return-last"
    >
      <Sequence>
        <Implement ticket={ticket} />
        <Validate ticket={ticket} />
        <Review ticket={ticket} />
        <ReviewFix ticket={ticket} />
      </Sequence>
    </Loop>
  );
}
```

## Parallel Review — Review.tsx

```tsx
// scripts/worktree-feature/components/Review.tsx
import { Parallel } from "smithers-orchestrator";
import { Task, useCtx, outputs } from "../smithers";
import { claude, codex } from "../agents";
import ReviewPrompt from "./Review.mdx";

export function Review({ ticket }: { ticket: { id: string; title: string } }) {
  const ctx = useCtx();
  const ticketId = ticket.id;
  const latestValidate = ctx.latest("validate", `${ticketId}:validate`);

  if (!latestValidate?.allPassed) return null;

  return (
    <Parallel>
      <Task
        id={`${ticketId}:review-claude`}
        output={outputs.review}
        agent={claude}
        timeoutMs={15 * 60 * 1000}
        continueOnFail
      >
        <ReviewPrompt ticketId={ticketId} reviewer="claude" />
      </Task>

      <Task
        id={`${ticketId}:review-codex`}
        output={outputs.review}
        agent={codex}
        timeoutMs={15 * 60 * 1000}
        continueOnFail
      >
        <ReviewPrompt ticketId={ticketId} reviewer="codex" />
      </Task>
    </Parallel>
  );
}
```

## Ticket Pipeline — TicketPipeline.tsx

```tsx
// scripts/worktree-feature/components/TicketPipeline.tsx
import { Sequence } from "smithers-orchestrator";
import { ValidationLoop } from "./ValidationLoop";
import { Report } from "./Report";
import { useCtx } from "../smithers";

export function TicketPipeline({ ticket }: { ticket: { id: string } }) {
  const ctx = useCtx();
  const latestReport = ctx.latest("report", `${ticket.id}:report`);
  const ticketComplete = latestReport != null;

  return (
    <Sequence key={ticket.id} skipIf={ticketComplete}>
      <ValidationLoop ticket={ticket} />
      <Report ticket={ticket} />
    </Sequence>
  );
}
```

## Running

```bash
cd scripts/worktree-feature
bun install
./run.sh
```

## Key Patterns

- **`createSmithers`** registers 6 output schemas; generates typed `tables`, `outputs`, and `Task` components.
- **`ClaudeCodeAgent` / `CodexAgent`** run real CLI tools with full filesystem access.
- **`<Loop>`** iterates implement/validate/review/fix until both reviewers approve or `MAX_REVIEW_ROUNDS` exhausted.
- **`<Parallel>`** runs dual review simultaneously; both must approve.
- **`ctx.latest(schemaKey, nodeId)`** reads the highest-iteration output for a task.
- **MDX prompts** -- `.mdx` files serve as prompt templates with JSX interpolation.
- **`skipIf`** skips already-completed tickets on resume.
- **`continueOnFail`** prevents a single review failure from blocking the pipeline.
- **Dynamic ticket mapping** -- `unfinishedTickets.map()` renders one `TicketPipeline` per ticket.