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Idempotent Redundancy

parcadei/continuous-claude-v3

When you're building fallback paths or redundant systems, you need them to be safe to run multiple times without causing loops or corruption. This pattern is about making those safety nets idempotent. Check if a value exists before writing it in your fallback, use atomic operations for files, pass flags like `_is_merge: true` when updating data stores. The alternative is repair actions that trigger more repairs, or multiple code paths stomping on each other's writes. It's one of those things that seems obvious after you've debugged a reconciliation loop at 2am, but easy to miss when you're just trying to add redundancy.

skills.sh installs
491
GitHub stars
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last updated
Aug 21, 2026
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Install

$ npx -y skills add parcadei/continuous-claude-v3 --skill idempotent-redundancy --agent claude-code

Installs into .claude/skills of the current project.

Files

Idempotent Redundancy

When adding redundant paths (fallbacks, belt-and-suspenders), make them idempotent.

Pattern

Redundancy without idempotency causes loops, churn, or data corruption.

DO

  • Use _is_merge: true for Braintrust updates
  • Check if value exists before writing (fallback only if missing)
  • Use atomic write/rename for file operations
  • Make reconciliation steps safe to run repeatedly

DON'T

  • Write unconditionally in fallback paths
  • Allow multiple writers to overwrite each other
  • Fire "repair" actions that can trigger more repairs

Source Sessions

  • a541f08a: "Redundancy is good only if idempotent"
  • 1c21e6c8: "Belt-and-suspenders, but make it idempotent"
  • 6a9f2d7a: "Idempotent repair hooks"
SKILL.md on GitHub

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Details

Repository
github.com/parcadei/continuous-claude-v3
First seen
Jun 3, 2026

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