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SKILL verified MIT Self-run

Subagent Orchestration

skill-kpab-claude-fable-5-skills-subagent-orchestration · by kpab

Patterns for delegating work to parallel subagents with Claude Fable 5 — when to split tasks, async coordination, long-lived workers, and fresh-context verifiers. Use when designing multi-agent harnesses, when a large task has independent parts, when runs bottleneck on sequential steps, or when self-review keeps missing its own mistakes.

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Install

$ agentstack add skill-kpab-claude-fable-5-skills-subagent-orchestration

✓ scanned · ✓ verified — works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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About

Subagent Orchestration

Fable 5 dispatches and sustains parallel subagents far more dependably than prior models. Used well this cuts wall-clock time and improves verification quality; used badly it burns tokens on coordination overhead. The patterns:

When to delegate

Split out a subtask when it is (a) independent of your current working context, (b) large enough to amortize the handoff, and (c) specifiable in a few sentences plus file pointers. Don't delegate tightly coupled edits — coordination costs exceed parallelism gains.

Coordination

  • Launch independent subagents in the same turn and keep working while they run; don't block on the slowest one.
  • Intervene only on signal: a subagent off-track or missing context it can't discover itself.
  • Prefer long-lived subagents that carry context across related subtasks over respawning per subtask — repeated context loading is the dominant hidden cost.

Fresh-context verifiers

For checking finished work, a separate verifier subagent with a clean context outperforms self-critique: it can't share your blind spots because it doesn't share your assumptions. Give the verifier the specification and the output — not your reasoning — and have it report discrepancies against the spec at a defined cadence (every N components, every X hours) rather than once at the end.

Handoff template

A good subagent brief contains exactly: goal (one sentence), inputs (paths/data), definition of done (checkable), constraints (what not to touch), and where to write results. If you can't fill these in, the task isn't ready to delegate.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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