agentleFS
stjarnstromstjarnstrom/spec-system/skills/fan-out/SKILL.md

fan-out

Skill0 starsChanged 46 days agoMITView on GitHub

Split work that has many independent units across parallel subagents, verify each one's evidence, and consolidate into one result. Use for audits across many services, files, or capabilities; migrations that touch many places the same way; several unrelated failures; or when the user asks to parallelise.

8 other projects use a version of this.

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The file

We split this skill into the rules it gives an agent

1 rule. 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • 0

    Common

    Most of the 6 edited versions we read keep these.

  • 1

    Distinctive

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Read-only work (audits, investigations): general-purpose agents told to read and not edit.

    line 31

“Common” is measured: kept by at least 6 in 10 of the 6 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Fan out, verify, consolidate. Parallel agents are fast and fresh-eyed; they also make confident mistakes. The value is in the verification step.

Procedure

  1. Split into units that share nothing. One per service, directory, capability (with a spec layer the registry already draws those lines), or failure domain. A unit fits one fresh context. Units that share state, a file, or a root cause are one unit — splitting them buys conflicts, not speed.
  2. Write one brief per unit, the same shape for all:
    • scope: the paths, and "change nothing outside them";
    • the question or change, stated once, with the exact criteria;
    • the output contract: a table row per finding with file:line evidence, or for a change, the commits and the test command's output;
    • "do not spawn subagents". Briefs go to files when they are long; the dispatch names the path.
  3. Dispatch every unit in one message so they run concurrently.
    • Read-only work (audits, investigations): general-purpose agents told to read and not edit.
    • Changes: spec-system:implementer, each with isolation: "worktree", its own branch name, and the base commit. The same change in many places is still one task per place, reviewed as one diff when the change is mechanical.
    • Size the fan-out to the work, not the other way round.
  4. Verify before you consolidate.
    • Discard findings without file:line evidence.
    • Spot-check a sample of each agent's claims yourself; agents repeat the same systematic error across units.
    • For changes: merge each branch (spec-system:merge-conflicts when needed), then run the full suite once on the merged result. Per-unit green does not prove the whole is green.
  5. Consolidate into one table: unit, finding or change, evidence, confidence. Mark what you could not confirm and say where you looked. With a spec layer, audit findings about behaviour cite the statement they contradict and go to the anomaly list — an audit records, it does not fix.

Rules

  • Subagents do not spawn subagents. One level of fan-out.
  • The consolidated result is yours: a finding you did not verify is labelled unverified, not dropped silently and not passed on as fact.

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