Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add commands/vercel/workflow/demogit clone --depth 1 https://github.com/vercel/workflowWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00007 | $0.00453 |
| Opus 5 | $0.00003 | $0.00227 |
| Sonnet 5 | $0.00001 | $0.00091 |
| Haiku 4.5 | $0.00001 | $0.00045 |
Grade A, and why
demo scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
allowed-tools: Bash(curl:*), Bash(npx workflow:*), Bash(pnpm dev), Bash(docker *), Bash(open *) What it actually says
Run the demo workflow with OpenTelemetry tracing enabled.
Steps
-
Start Jaeger for OTEL trace visualization (if not already running):
docker run -d --name jaeger-otel \ -p 16686:16686 \ -p 4317:4317 \ -p 4318:4318 \ jaegertracing/jaeger:2.4.0 2>&1 || docker start jaeger-otel -
Open the Jaeger UI in the browser:
open http://localhost:16686 -
Start the workbench (default: nextjs-turbopack) with OTEL tracing enabled:
cd workbench/nextjs-turbopack OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:4318" \ OTEL_EXPORTER_OTLP_PROTOCOL="http/protobuf" \ pnpm devAlso start the workflow web UI in a separate terminal (from the same workbench directory):
cd workbench/nextjs-turbopack npx workflow web -
Trigger the 7_full.ts workflow:
curl -X POST "http://localhost:3000/api/trigger?workflowFile=workflows/7_full.ts&workflowFn=handleUserSignup" -
View traces in Jaeger UI at http://localhost:16686 - select service
example-nextjs-workflow
Tracing Details
The traces include:
- Step execution spans with
workflow.queue.overhead_ms,step.attempt,step.status - Workflow orchestration spans with
workflow.run.status,workflow.events.count - Queue message spans with messaging attributes
$ARGUMENTS can specify a different workbench (e.g., "example" or "nextjs-webpack").
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 53 lines · 7 tokens per session scan A e013ca50ac44
demo is a command published in the GitHub repository vercel/workflow (2,363 stars, last pushed 3d ago), licensed Apache-2.0. It adds 7 tokens to every session and 453 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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