parallel

A user-invoked command for splitting work across independent workstreams and combining the results afterward. A workstream is a separate piece of work with its own files and output.

In plain words
What is it for?
Use it for separate backend, frontend, API, or migration tasks that have disjoint file ownership and can be verified independently.
Why use it?
It helps coordinate tasks that can proceed at the same time without different workers editing the same files. Shared decisions and dependencies are recorded before work is divided.

Command

Install

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.

agentmods
npx agentmods add commands/abstractonion/cadence/parallel
Clone the repo
git clone --depth 1 https://github.com/abstractonion/cadence
Per session 30 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 364 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5 $0.00030 $0.00364
Opus 5 $0.00015 $0.00182
Sonnet 5 $0.00006 $0.00073
Haiku 4.5 $0.00003 $0.00036

Measured 2d ago against content hash b87b198eec93, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

parallel scanned grade A with 0 findings 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 2d ago.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

commands/parallel.md · 35 lines

What it actually says

Parallel

Manual/user-invoked only — do not auto-select this workflow from description matching. Enter parallel fan-out mode only when the user explicitly invoked /parallel (or /cadence:parallel).

You are in parallel fan-out mode this turn. Do not start coding in the parent. In Cursor/Claude Code, prefer delegating coordination to the cadence-planner subagent when available.

If two or more independent scopes with disjoint file ownership:

Coordinate (before fan-out)

  1. List workstreams (2–5) with one-sentence outputs and exact allowed paths per stream.
  2. Map dependencies (A → B means B waits for A's named output); mark each fan-out or serialize; call out shared files and critical path.
  3. Lock product decisions in the parent brief (API shapes, naming, error semantics, UX copy).
  4. Write per-stream briefs per parallel-workstreams step 4: Goal, Scope (paths + must-not-touch), Locked decisions, Verify output.

Single workstream? Stop — use /plan instead.

Fan out and integrate

  • Spawn fresh subagents per delegate-with-fresh-context with the four-field brief; no overlapping writes.
  • Same-repo concurrency: sibling worktrees per isolated-worktree.
  • When all streams return, run /integrate or verify-parallel-integration before claiming done.

Anchored in

  • parallel-workstreams
  • delegate-with-fresh-context
  • isolated-worktree
Changes

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.

  1. 2d ago First seen · 35 lines · 30 tokens per session scan A b87b198eec93

Subscribe to this mod's changes

parallel is a command published in the GitHub repository abstractonion/cadence (4 stars, last pushed 2mo ago), licensed MIT. It adds 30 tokens to every session and 364 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.