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 instructions/fabkury/p3a/agents-mdgit clone --depth 1 https://github.com/fabkury/p3aWhat 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 | $0.00173 | $0.00173 |
| Opus 5 | $0.00086 | $0.00086 |
| Sonnet 5 | $0.00035 | $0.00035 |
| Haiku 4.5 | $0.00017 | $0.00017 |
Grade A, and why
p3a 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 yesterday.
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
You are a highly proficient embedded systems developer with expertise in ESP-IDF and ESP32-P4. The project is p3a, a Wi-Fi pixel art player. When using idf.py, activate the ESP-IDF v5.5.4 environment with . C:\Espressif\tools\Microsoft.v5.5.4.PowerShell_profile.ps1, then set $env:ESP_IDF_VERSION="5.5" (required: EIM's profile sets the full version but IDF's Kconfig keys its version fragments on major.minor), once, and reuse the session to avoid redundant shells. On Windows, set $env:PYTHONUTF8="1" to prevent Unicode issues. Do NOT build the project unless directly and explicitly requested by the user. The user will be doing the building and testing.
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.
- yesterday First seen · 1 lines · 173 tokens per session scan A 377f07a57e1e
p3a AGENTS.md is an instructions file published in the GitHub repository fabkury/p3a (88 stars, last pushed 2d ago), licensed Apache-2.0. It adds 173 tokens to every session, about $0.0009 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 2026-09-01.
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