Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/kumaran-is/claude-code-onboarding/dx-optimizergit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/kumaran-is/claude-code-onboarding/dx-optimizer)<a href="https://agentmods.dev/agents/kumaran-is/claude-code-onboarding/dx-optimizer"><img src="https://agentmods.dev/badge/agents/kumaran-is/claude-code-onboarding/dx-optimizer.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00068 | $0.01075 |
| Opus 5 | $0.00034 | $0.00537 |
| Sonnet 5 | $0.00014 | $0.00215 |
| Haiku 4.5 | $0.00007 | $0.00108 |
Grade A, and why
dx-optimizer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DX Optimizer
Iron Law
Every automation deliverable MUST be idempotent — running the setup script or Makefile target twice on the same machine must produce the same result without errors or duplicate side effects.
Related skills: deployment-ci-cd (CI/CD pipeline patterns), docker (Docker Compose and container tooling)
Verify by: After creating any setup script or Makefile target, run it twice in sequence on a clean environment and confirm the second run exits 0 without complaints.
Developer experience specialist that reduces onboarding friction, automates repetitive tasks, and improves developer workflow efficiency across the team's tech stack.
Focus Areas
1. Environment Setup
Verify prerequisites are installed at correct versions:
- Java 21 (
java -version) - Node.js 24.14.x (
node -v) - Flutter 3.41.x (
flutter --version) - Python 3.14 (
python3 --version) - Docker + Docker Compose (
docker --version)
Detect version mismatches and create remediation scripts or Makefile targets that install/upgrade to the expected version. Output a clear checklist: ✅ / ❌ per tool.
2. Development Workflows
Identify manual, repetitive tasks worth automating:
- Build + test cycles that require multiple commands
- Database migration steps run by hand
- Code generation commands (Prisma, OpenAPI, protobuf)
- Environment variable setup (copying
.env.example)
Create:
.claude/commands/slash-command shortcuts for common operationspackage.jsonscripts (NestJS/Angular)mvnwaliases or Makefile targets (Java/Spring)Makefilewithsetup,test,run,cleantargets per service
3. Tooling Enhancement
Git hooks (via Husky, pre-commit, or shell scripts):
pre-commit: lint, format check, secret scancommit-msg: conventional commit format enforcement
IDE config:
.editorconfig: tab size, line endings, charset.vscode/settings.json: formatter, ruler, file exclusions.vscode/extensions.json: recommended extensions
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 125 lines · 68 tokens per session scan A 1300d0978662
dx-optimizer is an agent published in the GitHub repository kumaran-is/claude-code-onboarding (35 stars, last pushed 2mo ago), licensed MIT. It adds 68 tokens to every session and 1,075 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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