Borrowing it
Nothing to install: this file belongs to blwfish/kicad-mcp. 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/blwfish/kicad-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/blwfish/kicad-mcpWrote 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/blwfish/kicad-mcp/agents-md)<a href="https://agentmods.dev/instructions/blwfish/kicad-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/blwfish/kicad-mcp/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/blwfish/kicad-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/blwfish/kicad-mcp/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 | $0.02217 | $0.02217 |
| Opus 5.5 | $0.00887 | $0.00887 |
| Sonnet 5.5 | $0.00443 | $0.00443 |
| Haiku 4.5 | $0.00222 | $0.00222 |
Grade A, and why
kicad-mcp 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.
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent working notes — kicad-mcp
Conventions for any AI agent (Claude Code, Cursor, etc.) working in this repo.
General contributor guidance — bug reports, PR style, threshold-test coverage —
is in CONTRIBUTING.md. This file holds the few rules that are easy to violate
while generating code and expensive to retrofit.
Boundary ops: extract decision logic before welding it to pcbnew
When you add or edit a tool that runs a pcbnew or kicad-cli script — anything
that builds a script string for run_pcbnew_script — do not put decision
logic (geometry, thresholds, classification) inside that string. Across the
process boundary it becomes unreachable to any in-process test, and the only test
left is a tautological boundary-mock that asserts its own configured return and
cannot fail.
Instead:
- Put the pure logic in a
*_HELPERstring inutils/(exemplar:utils/geometry.py→GEOMETRY_HELPER). - Keep the embedded script a thin shell: load the board, marshal
pcbnewobjects into plain dicts, splice the helper in by concatenation (""" + _MY_HELPER + """), and call the helper for every decision. - Add a no-KiCad test that
execs the helper and asserts at the boundaries (value / just-below / just-above).
Full pattern and a copyable skeleton: docs/BOUNDARY_OPS.md. Straight-line
marshalling (load → mutate → save, no branching) needs no helper — don't invent
one.
Before finishing such work, run the report-only ratchet:
python scripts/audit_testability.py # report-only; --check fails on NEW violations
It flags new helperless boundary logic and new tautological boundary tests.
Pre-existing violations are grandfathered in scripts/testability_baseline.json;
extracting one ratchets the count down. Refresh after an intentional change with
--update-baseline.
New mutating PCB tool? Wire it into utils/pcb_lock.py
Any tool that loads, modifies, and saves pcb_path (or a sibling
.kicad_pro/derived output the operation is documented as needing
serialized — see AGENT-INSTRUCTIONS.md's "No concurrent PCB writes")
must acquire utils/pcb_lock.py's pcb_write_lock(pcb_path) before doing
its actual work, and return busy_error(pcb_path) immediately if it
comes back False — never block and wait (a queued autoroute pass can
legitimately hold this for up to 30 minutes; a caller silently hanging
that long is worse than an immediate, actionable error).
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 Changed · +21 lines · +323 tokens per session 85b0fee6585c
- 1mo ago Changed · +35 lines · +508 tokens per session 3c9af9ec88f9
- 2mo ago First seen · 104 lines · 1,386 tokens per session scan A f9dbedc6f49f
kicad-mcp AGENTS.md is an instructions file published in the GitHub repository blwfish/kicad-mcp (27 stars, last pushed 6d ago), licensed MIT. It adds 2,217 tokens to every session, about $0.0089 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.
kicad-mcp AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| kicad-mcp AGENTS.mdblwfish/kicad-mcp | Instructions file | 27 | 6d ago | MIT | A | 2,217 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |