JSPM

Context Engineering & Harness Engineering Toolkit for Claude Code

Structured prompts, agent orchestration, and automated pipelines — debugging, code review, UI design, product specs, and more.

If devlyn-cli saved you time, give it a star — it helps others find it too.

Install

npx devlyn-cli

That's it. The interactive installer handles everything. Run it again anytime to update.

How It Works — Three Steps, Full Cycle

devlyn-cli turns Claude Code into an autonomous development pipeline. The core loop is simple:

ideate  →  auto-resolve  →  preflight  →  fix gaps  →  ship

Step 1 — Plan with /devlyn:ideate

Turn a raw idea into structured, implementation-ready specs.

/devlyn:ideate "I want to build a habit tracking app with AI nudges"

This produces three documents through interactive brainstorming:

Need to add features later? Run ideate again — it expands the existing roadmap.

Step 2 — Build with /devlyn:auto-resolve

Point it at a spec (or just describe what you want) and walk away.

/devlyn:auto-resolve "Implement per spec at docs/roadmap/phase-1/1.1-user-auth.md"

It runs a 10-phase pipeline autonomously:

Build → Build Gate → Browser Test → Evaluate → Fix Loop → Simplify → Review → Security → Clean → Docs

• Each phase runs as a separate agent with fresh context
• Git checkpoints at every phase for safe rollback
• Build Gate runs your project's real compilers, typecheckers, and linters — catches type errors, cross-package drift, and Docker build failures that tests alone miss. Auto-detects project type (Next.js, Rust, Go, Solidity, Expo, Swift, and more) and Dockerfiles.
• Browser validation tests your feature end-to-end (clicks, forms, verification)
• Evaluation grades against done-criteria — if it fails, auto-fix and re-evaluate

Skip phases you don't need: --skip-browser, --skip-review, --skip-clean, --skip-docs, --skip-build-gate, --max-rounds 6 Customize the build gate: --build-gate strict (warnings = errors), --build-gate no-docker (skip Docker builds for speed) Use dual-model routing: --engine auto (Codex builds, Claude evaluates — see below)

Step 3 — Verify with /devlyn:preflight

After implementing all roadmap items, run a final alignment check:

/devlyn:preflight

Reads every commitment from your vision, roadmap, and item specs, then audits the codebase evidence-based. Catches what you missed:

Confirmed gaps become new roadmap items — feed them back into auto-resolve. Use --autofix to do this automatically, or --phase 2 to check only one phase.

Bonus — Intelligent Model Routing with --engine

Install the Codex MCP server during setup, then:

/devlyn:auto-resolve "fix the auth bug" --engine auto

--engine auto routes each pipeline phase and team role to the optimal model (Claude Opus 4.6 or GPT-5.4) — validated through A/B testing, not just benchmarks.

--engine auto (default, recommended) · --engine codex (force Codex for build) · --engine claude (Claude only)

Works across the full pipeline:

/devlyn:auto-resolve "implement feature" --engine auto
/devlyn:ideate "plan new project" --engine auto
/devlyn:preflight --engine auto

/devlyn:auto-resolve "fix the auth bug" --with-codex

Manual Commands

When you want step-by-step control instead of the full pipeline.

Debugging & Resolution

Code Review & Quality

UI Design Pipeline

Use /devlyn:team-design-ui for step 1 with a full creative team.

Planning & Docs

Auto-Activated Skills

These activate automatically — no commands needed. They shape how Claude thinks during relevant tasks.

Optional Add-ons

Selected during install. Run npx devlyn-cli again to add more.

Want to add a pack? Open a PR adding it to the OPTIONAL_ADDONS array in bin/devlyn.js.

Requirements

• Node.js 18+
• Claude Code installed and configured

Contributing

• Add a command — .md file in config/commands/
• Add a skill — directory in config/skills/ with SKILL.md
• Add optional skill — add to optional-skills/ and OPTIONAL_ADDONS
• Suggest a pack — PR to the pack list

Star History

License

MIT — Nocodecat @ Donut Studio