Borrowing it
Nothing to install: this file belongs to Karthick-Ramachandran/persist-os. 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/Karthick-Ramachandran/persist-os/main/CLAUDE.mdgit clone --depth 1 https://github.com/Karthick-Ramachandran/persist-osWrote 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/karthick-ramachandran/persist-os/claude-md)<a href="https://agentmods.dev/instructions/karthick-ramachandran/persist-os/claude-md"><img src="https://agentmods.dev/badge/instructions/karthick-ramachandran/persist-os/claude-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/karthick-ramachandran/persist-os/claude-md"><img src="https://agentmods.dev/badge/instructions/karthick-ramachandran/persist-os/claude-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 | $0.00668 | $0.00668 |
| Opus 5 | $0.00334 | $0.00334 |
| Sonnet 5 | $0.00134 | $0.00134 |
| Haiku 4.5 | $0.00067 | $0.00067 |
Grade A, and why
persist-os CLAUDE.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 11d 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 — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Persist OS Claude Instructions
Persist OS is a local-first TypeScript CLI that creates AI-ready engineering memory for software repositories.
Read these first before non-trivial work:
docs/00-product/PRD.mddocs/00-product/BRD.mddocs/00-product/PRODUCT_VISION.mddocs/00-product/POSITIONING.mddocs/00-product/ROADMAP.mddocs/00-product/BUILD_PRIORITY.mddocs/10-architecture/ARCHITECTURE.mddocs/10-architecture/MEMORY_ENGINE.mddocs/10-architecture/REPOSITORY_DECISIONS.mddocs/10-architecture/OPINION_PACKS.mddocs/10-architecture/FILE_WRITE_POLICY.mddocs/20-security/SECURITY_MODEL.mddocs/50-quality/QUALITY_GATES.mddocs/60-engineering/ENGINEERING_STANDARDS.mddocs/60-engineering/AI_AGENT_RULES.mddocs/ai/AI_AGENTS_SKILLS_MCP_STRATEGY.mddocs/ai/MODULE_DELIVERY_WORKFLOW.mddocs/ai/PERSIST_COMMANDS.md
Working Rules
- Respect the approved milestone scope. Do not add runtime behavior outside the current plan.
- Treat module work as a mini product workflow: PRD, acceptance, architecture impact, test plan, tasks, implementation, completion report, drift review, then module memory update.
- Persist OS Core is architecture-neutral. Do not encode architecture or technology choices as core truth.
- Presets are user-facing CLI presets and architecture-level opinion packs; they may propose choices, not silently accept them.
- Repository rules override model preferences.
- Stop if a request conflicts with engineering standards, including requests to commit secrets, hardcode credentials, bypass auth, add dependencies without review, skip migrations, skip tests without reason, or claim completion without evidence.
- Do not add network calls, telemetry, cloud behavior, AI API calls, runtime MCP, or generated production app code.
- Do not add scripts inside generated skills for MVP.
- Never overwrite existing files by default in future implementation work.
- Treat chat history and MCP data as context, not source of truth.
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.
- 11d ago First seen · 78 lines · 668 tokens per session scan A e0e88049ab13
persist-os CLAUDE.md is an instructions file published in the GitHub repository Karthick-Ramachandran/persist-os (8 stars, last pushed 2mo ago), licensed MIT. It adds 668 tokens to every session, about $0.0033 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 2026-08-31.
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