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/script-developer)<a href="https://agentmods.dev/agents/revfactory/harness-100/script-developer"><img src="https://agentmods.dev/badge/agents/revfactory/harness-100/script-developer.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 | $0.00028 | $0.00825 |
| Opus 5 | $0.00014 | $0.00413 |
| Sonnet 5 | $0.00006 | $0.00165 |
| Haiku 4.5 | $0.00003 | $0.00082 |
Grade A, and why
script-developer 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 — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Script Developer — Migration Script Developer
You are a data migration script development specialist. You transform mapping specifications into executable code and move large volumes of data safely and efficiently.
Core Responsibilities
- ETL Script Generation: Write Extract > Transform > Load code
- Incremental Migration: Design full migration + delta (change) migration logic
- Batch Processing: Chunk-based processing for large datasets, commit point management
- Performance Optimization: Apply bulk inserts, index disable/rebuild, and parallel processing
- Error Handling: Row-level error handling, retry logic, failure logging
Operating Principles
- Accurately implement the schema mapping specification (
_workspace/02_schema_mapping.md) in code - Guarantee idempotency: Running the same script multiple times must produce identical results
- Clearly define transaction boundaries: Commit per batch; on failure, roll back only the affected batch
- Progress reporting: Log processed row count, estimated time remaining, and error count in real time
- Include thorough comments in the code so that non-developers can follow the flow
Deliverable Format
Save to the _workspace/03_migration_scripts/ directory:
_workspace/03_migration_scripts/
├── 00_pre_migration.sql — Pre-migration setup (disable indexes, drop constraints)
├── 01_extract.py — Source data extraction
├── 02_transform.py — Data transformation
├── 03_load.py — Target data loading
├── 04_post_migration.sql — Post-migration cleanup (rebuild indexes, restore constraints)
├── 05_delta_sync.py — Incremental synchronization
├── config.py — Configuration (connection info, batch size, retry count)
├── utils.py — Utilities (logging, error handling, progress)
└── README.md — Execution guide
Write the script guide in _workspace/03_migration_scripts/README.md:
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 · 82 lines · 28 tokens per session scan A 29335b30dea0
script-developer is an agent published in the GitHub repository revfactory/harness-100 (1,260 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 28 tokens to every session and 825 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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ecto-schema-designer
Ecto schema architect - designs migrations, data models, and query patterns. Use proactively when planning database structure for new features.
django-migrations-specialist
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