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 skills add magnus919/agent-skills --skill fpga-developmentgit clone --depth 1 https://github.com/magnus919/agent-skillsWrote 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/skills/magnus919/agent-skills/fpga-development)<a href="https://agentmods.dev/skills/magnus919/agent-skills/fpga-development"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/fpga-development/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/skills/magnus919/agent-skills/fpga-development"><img src="https://agentmods.dev/badge/skills/magnus919/agent-skills/fpga-development.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 | $0.00097 | $0.01959 |
| Opus 5.5 | $0.00039 | $0.00784 |
| Sonnet 5.5 | $0.00019 | $0.00392 |
| Haiku 4.5 | $0.00010 | $0.00196 |
Grade A, and why
fpga-development 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 — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FPGA Development
Treat HDL as a description of concurrent hardware with explicit temporal and electrical interfaces. A correct design requires consistent functional intent, language semantics, clock/reset behavior, implementation constraints and verification evidence. Compilation, simulation, synthesis, timing and physical observation establish different facts.
Operating contract
- Identify the requested decision and design boundary: new RTL, review, simulation failure, resource problem, CDC/timing analysis, implementation or hardware release. Use the smallest complete evidence set for that decision.
- Record device/package, board revision, clocks, reset, I/O voltage and pin constraints before making target-specific claims. Pure RTL reasoning can proceed from a stated abstract interface without inventing a board.
- State transaction semantics, latency, throughput, backpressure, loss/duplication policy, initialization and arithmetic behavior before implementation. A waveform picture is not an interface contract.
- Keep synthesizable design and verification-only constructs separate. Match the HDL subset and vendor primitive model to the actual simulator and synthesizer versions.
- Review constraint coverage and exception intent before interpreting slack. A green summary with missing clocks or unconstrained endpoints is incomplete evidence.
- Before programming, resetting, erasing or otherwise changing connected hardware, confirm the target, scope, and rollback path before acting. Read-only discovery may proceed without confirmation. Bitstreams and programming paths must match the exact target.
- Retain artifacts tied to one source/constraint/tool/device configuration. Do not combine yesterday's tests with today's unverified bitstream into a release claim.
Task routing
Read only the relevant depth references; use their templates to retain reviewable decisions.
| Task | Reference | Template |
|---|---|---|
| Establish device and external interface requirements | Target and interface contracts | Target contract |
| Review RTL semantics, inference and arithmetic | RTL and arithmetic | RTL contract |
| Build a self-checking verification strategy | Simulation and verification | Simulation plan |
| Review clocks, reset and domain crossings | Clocks, reset and CDC | CDC review |
| Diagnose timing or review constraints | Timing and constraints | Timing review |
| Decide pipelining, memory, DSP and implementation tradeoffs | Implementation and resources | RTL contract and timing review |
| Release an implementation or plan physical bring-up | Release and hardware verification | Implementation release |
What ships with it
19 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- assets/rv_buffer.sv 1.0 KB
- assets/tb_rv_buffer.sv 3.8 KB
- evals/evals.json 6.4 KB
- README.md 2.5 KB
- references/01-target-and-interface-contracts.md 5.0 KB
- references/02-rtl-synthesizability-and-arithmetic.md 5.6 KB
- references/03-simulation-and-verification.md 5.1 KB
- references/04-clocks-reset-and-cdc.md 5.4 KB
- references/05-timing-and-constraints.md 5.2 KB
- references/06-implementation-and-resource-tradeoffs.md 4.4 KB
- references/07-release-and-hardware-verification.md 3.5 KB
- scripts/fpga_fixture.py 4.8 KB runs code
- scripts/test_fixture.py 4.2 KB runs code
- templates/cdc-review.md 1.6 KB
- templates/implementation-release.md 1.4 KB
- templates/rtl-contract.md 1.5 KB
- templates/simulation-plan.md 1.5 KB
- templates/target-contract.md 1.4 KB
- templates/timing-review.md 1.4 KB
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 · 98 lines · 97 tokens per session scan A 00694220016d
fpga-development is a skill published in the GitHub repository magnus919/agent-skills (133 stars, last pushed 2d ago), licensed MIT. It adds 97 tokens to every session and 1,959 once invoked, about $0.0004 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 2026-09-15.
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