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A drop-in MCP server that runs PM → Research → Brand → UX → GTM with mandatory human checkpoints. One binary. Survives crashes. Works in Claude Code, Cursor, VS Code, Copilot CLI.

request early access see how it works
how it works

One brief in, a launch plan out — with humans in the loop.

product_brief.md
        │
        ▼
   pm_plan     ─────────► output/pm_brief_for_agent1.md
        │
        ▼
 run_research  ─────► output/01_research.md         # web search
        │
        ▼  H1: human approves or iterates
  run_brand    ────────► output/02_brand_messaging.md
        │
        ▼  H2
   run_ux      ───────► output/03_ux.md
        │
        ▼  H3
   run_gtm     ──────► output/04_go_to_market.md     # 4a + 4b parallel
        │
        ▼  H4
 assemble_plan ───► output/final_product_plan.md
why this exists

Multi-agent workflows, without the framework tax.

No framework lock-in

It's an MCP server. Works with any client that speaks MCP — Claude Code, Cursor, Windsurf, VS Code, Copilot CLI. No SDK, no glue code.

Human in the loop, by default

Four mandatory checkpoints. Approve, iterate with notes, or skip. The agent never finalises a stage without you.

Crash-resume built in

Stage outputs and meta are written to disk after each step. Re-run with the same brief and it picks up where it stopped.

Two transports, one binary

Stdio for local clients, Streamable-HTTP for remote (Claude.ai connectors). Same 8 tools, same code path.

Context-window safe

A built-in guard trims agent inputs before they overflow Claude's window. No mysterious 400s mid-pipeline.

Single static binary

Pure Go. ~12 MB. No runtime, no Docker, no Python env. go install or grab a release.

quickstart

Five minutes, zero ceremony.

01 — download (macOS arm64 shown)
macOS / Linux — pick your platform binary
$ curl -L -o herald \
    https://github.com/tamish-max/herald-releases/releases/latest/download/herald-darwin-arm64
$ chmod +x herald && sudo mv herald /usr/local/bin/
02 — install your license key
we email this to you after you fill the form
$ export HERALD_LICENSE='HERALD-...your-key...'
# or persist it:
$ mkdir -p ~/.herald && \
    echo 'HERALD-...' > ~/.herald/license
03 — set your anthropic key
$ export ANTHROPIC_API_KEY=sk-ant-...
04 — wire it in (.mcp.json)
{
  "mcpServers": {
    "herald": {
      "command": "herald",
      "env": {
        "ANTHROPIC_API_KEY": "${ANTHROPIC_API_KEY}",
        "HERALD_LICENSE":     "${HERALD_LICENSE}"
      }
    }
  }
}
05 — run
$ claude
// then, in the chat:
› use run_workflow with brief_path "./product_brief.md"
become an early tester

I'm looking for ~20 testers to break this in good faith.

What you get

Direct access to signed binaries, a private channel to me, and your name in the v1.0 credits. What I want back: the rough edges, the things that confused you, the moment you nearly closed the tab.

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