Borrowing it
Nothing to install: this file belongs to yuvhaim-gif/dev_harness. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/yuvhaim-gif/dev_harness/main/AGENTS.mdgit clone --depth 1 https://github.com/yuvhaim-gif/dev_harnessWrote 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/instructions/yuvhaim-gif/dev_harness/agents-md)<a href="https://agentmods.dev/instructions/yuvhaim-gif/dev_harness/agents-md"><img src="https://agentmods.dev/badge/instructions/yuvhaim-gif/dev_harness/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/yuvhaim-gif/dev_harness/agents-md"><img src="https://agentmods.dev/badge/instructions/yuvhaim-gif/dev_harness/agents-md.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00392 | $0.00392 |
| Opus 5.5 | $0.00157 | $0.00157 |
| Sonnet 5.5 | $0.00078 | $0.00078 |
| Haiku 4.5 | $0.00039 | $0.00039 |
Grade A, and why
dev_harness AGENTS.md 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 1mo 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.
What it actually says
schema_version: 1
tasks: add_payments_endpoint: description: > Add a POST /payments endpoint to the billing service. Accepts amount, currency, and user_id. Returns a transaction_id. mutation_mode: evolve # evolve = may edit spec_docs, tests, targets spec_docs: # OKF concept bundle (each has a non-empty 'type') - harness/example/docs/IMPLEMENTATION.md - harness/example/docs/API_SCHEMA.md - harness/example/docs/index.md - harness/example/docs/log.md contracts: # stable, hash-pinned (subset of spec_docs) - harness/example/docs/API_SCHEMA.md tests: - harness/example/tests/test_payments.py contract_tests: # tests that pin the contract (subset of tests) - harness/example/tests/test_payments.py targets: - harness/example/src/billing/routes.py - harness/example/src/billing/models.py locked_files: [] # AGENTS.md is ALWAYS locked implicitly commit_prefix: "feat" max_autorepair_attempts: 3 pr_labels: ["feature", "billing"]
optimise_query_layer: description: > Optimise the database query layer in harness/example/src/db/queries.py. Replace N+1 patterns with batch fetches. No API contract changes. mutation_mode: isolated # isolated = ONLY files in targets may change spec_docs: - harness/example/docs/IMPLEMENTATION.md tests: - harness/example/tests/test_queries.py targets: - harness/example/src/db/queries.py locked_files: - harness/example/docs/IMPLEMENTATION.md - harness/example/tests/test_queries.py commit_prefix: "perf" max_autorepair_attempts: 3 pr_labels: ["performance"]
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.
- 1mo ago First seen · 45 lines · 392 tokens per session scan A 8f76ea1077ad
dev_harness AGENTS.md is an instructions file published in the GitHub repository yuvhaim-gif/dev_harness (2 stars, last pushed 3mo ago), licensed MIT. It adds 392 tokens to every session, about $0.0016 per session on Opus 5.5. 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 2026-08-31.
Other instructions, from other repositories
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next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.