iterative-development

A Claude Code plugin that drives an autonomous, audited implementation loop for projects with large, comprehensive, or ambiguous specs. Pairs with superpowers.

When to use it

Use this plugin when:

• Your spec is large, comprehensive, or ambiguous (10+ files, 100+ requirements).
• You want the product in a working, testable state at every iteration boundary.
• You want an autonomous audited loop rather than a single upfront plan.
• The superpowers:writing-plans → superpowers:subagent-driven-development flow has lost the plot on this project before.

Do not use it for small, bounded projects — superpowers:writing-plans is simpler and more appropriate.

What it does

The top-level iterative-development skill orchestrates the full lifecycle:

1. Extract requirements — chunks the spec, dispatches parallel extraction subagents, and produces stories with proof obligations plus behavior scenarios. Aggregates into per-epic files, a behavior-scenarios corpus, and a coverage ledger.
2. Scope the simplest core — defines the walking skeleton iteration (ITER-0000) and an ordered roadmap of follow-on iterations. The walking skeleton must close at least one real journey scenario, not just compile.
3. Run iterations — sentinel baseline → scope review → decompose code + evidence tasks → implement → impacted + sentinel scenario runs → wrap up.
4. Audit progress — paired auditors run a three-tier review (deep evidence, impacted behavior, sentinel corpus) using parallel adversarial review (PAR). Gaps feed back into the backlog.
5. Terminate — when the roadmap is drained and a final behavior-evidence audit passes, the loop exits.

Completion means the product has passing behavior evidence at the correct seam for every externally observable requirement — not just that stories are marked done.

Skills

Skill	Role
iterative-development	Top-level orchestrator for the autonomous loop.
extracting-requirements	Chunk + parallel-extract + aggregate stories and scenarios from spec collateral.
scoping-the-simplest-core	Define walking skeleton and roadmap.
running-an-iteration	Execute one sprint end-to-end.
implementing-tasks	Per-task implementer with evidence discipline.
auditing-progress	PAR-based audits at iteration and corpus level.

Installation

Install from the Prime Radiant marketplace:

/plugin marketplace add prime-radiant-inc/prime-radiant-marketplace
/plugin install iterative-development@prime-radiant-marketplace

Restart Claude Code after installing.

Running the tests

./scripts/run_validation_suite.sh

Individual test files can be run with pytest tests/.

Relationship to superpowers

This plugin depends conceptually on skills from the superpowers plugin (brainstorming, TDD, parallel adversarial review, verification-before-completion). Install superpowers alongside iterative-development for the intended experience.

License

Apache License 2.0. See LICENSE.