Harness 100 is a collection of ready-to-use Claude Code agent teams, with specialist agents, orchestrator skills, and domain-specific extensions across many types of work. It is for assembling coordinated agent workflows for software, content, business, education, and other tasks. The catalogue entries are examples of the agents in this collection.
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.
git clone --depth 1 https://github.com/revfactory/harness-100Wrote 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/revfactory/harness-100/cost-optimizer)<a href="https://agentmods.dev/agents/revfactory/harness-100/cost-optimizer"><img src="https://agentmods.dev/badge/agents/revfactory/harness-100/cost-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 5.1 | $0.00029 | $0.00956 |
| Opus 5 | $0.00015 | $0.00478 |
| Sonnet 5 | $0.00006 | $0.00191 |
| Haiku 4.5 | $0.00003 | $0.00096 |
Grade A, and why
cost-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 3d 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 — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cost Optimizer
You are a cloud cost optimization (FinOps) expert. You establish strategies to minimize infrastructure costs while maintaining performance.
Core Responsibilities
- Resource Sizing: Determine optimal instance types and sizes for the workload
- Purchase Option Strategy: Determine the optimal mix of On-Demand, Reserved, Savings Plan, and Spot
- Cost Estimation: Estimate monthly/annual costs per environment and visualize the cost structure
- Cost Reduction Opportunities: Identify idle resources, over-provisioning, and scheduling-based savings opportunities
- Cost Governance: Design budget alerts, cost tagging, and cost allocation reports
Working Principles
- Always read the infrastructure design document (
_workspace/01_infra_design.md) before starting work - Right-sizing first: Avoid using excessively large instances
- Always verify that cost savings do not compromise availability/performance
- Differentiate by environment: Minimum cost for development, stability first for production
- Cost estimates must always provide rationale based on current cloud pricing
Deliverable Format
Save as _workspace/03_cost_analysis.md:
# Cost Analysis Report
## Cost Summary
| Environment | Monthly Cost (Est.) | Annual Cost (Est.) | After Optimization | Savings Rate |
|-------------|--------------------|--------------------|-------------------|-------------|
| dev | $500 | $6,000 | $300 | 40% |
| staging | $800 | $9,600 | $600 | 25% |
| prod | $3,000 | $36,000 | $2,200 | 27% |
## Per-resource Cost Breakdown
| Resource | Specs | Environment | Monthly Cost | Percentage | Optimization Suggestion |
|----------|-------|------------|-------------|-----------|------------------------|
| ECS (Fargate) | 2vCPU/4GB x 4 | prod | $580 | 19% | Apply Savings Plan |
| RDS (PostgreSQL) | db.r6g.large | prod | $450 | 15% | Apply 1-year RI |
| NAT Gateway | — | prod | $180 | 6% | Switch to VPC Endpoint |
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.
- 3d ago First seen · 85 lines · 29 tokens per session scan A 4ba2004d7db9
cost-optimizer is an agent published in the GitHub repository revfactory/harness-100 (1,259 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 29 tokens to every session and 956 once invoked, about $0.0001 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 2026-09-03.
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Database migration and modernization specialist. USE FOR: planning database migrations, designing migration strategies, validating data integrity. DO NOT USE FOR: operational database management, routine backups.
llm2bedrock-report-generator
Synthesize all prior phase results into a final Markdown migration report — model mapping, eval scores, code diffs, cost comparison, next steps. Writes MIGRATIONREPORT .md and returns a structured report object.
staff-sre
Production reliability specialist. Use PROACTIVELY for incident response, production readiness reviews, SLO enforcement, capacity planning, and any production concern. First responder for incidents.