What is ip_reference?

A reference library of ready-made Verilog implementations for common digital hardware modules. Verilog is a language used to describe electronic circuits, and each listed module includes a matching testbench template.

Use it when implementing modules such as arbiters, FIFOs, edge detectors, synchronizers, priority encoders, or counters. Look up the matching Verilog file and testbench, adapt the parameters, then verify it in the Foundry sandbox.

It reduces the need to design standard hardware building blocks from the beginning. The reference implementations and testbenches provide a starting point for compiling and simulating them.

ip_reference — Skill by ic-star-tech

Install

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.

agentmods

npx agentmods add skills/ic-star-tech/ccfoundry-agent-kit/ip_reference

Any agent

npx skills add ic-star-tech/ccfoundry-agent-kit --skill ip_reference

Clone the repo

git clone --depth 1 https://github.com/ic-star-tech/ccfoundry-agent-kit

Made for: Claude Code, Codex.

Per session 15 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 705 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00015	$0.00705
Opus 5	$0.00008	$0.00352
Sonnet 5	$0.00003	$0.00141
Haiku 4.5	$0.00002	$0.00071

Measured 2d ago against content hash 5183a9443690, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ip_reference 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 2d 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.

examples/verilog_module_writer/agent_space/skills/ip_reference/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

IP Reference Portfolio

Trigger

Use this skill when implementing standard digital modules. Look up the reference code from the references/ subdirectory instead of writing from scratch.

How to Use

Check the portfolio table below to find a matching module
Read the .v file from references/<module>/ for the implementation
Read the _tb.v file for the testbench template
Adapt parameters as needed by the task spec
Compile and simulate in the Foundry sandbox

File locations (relative to this skill directory):

references/
├── rra/             # Round Robin Arbiter
│   ├── rra.v
│   └── rra_tb.v
├── sync_fifo/       # Synchronous FIFO
│   ├── sync_fifo.v
│   └── sync_fifo_tb.v
├── edge_detect/     # Edge Detector
│   ├── edge_detect.v
│   └── edge_detect_tb.v
├── priority_enc/    # Priority Encoder
│   ├── priority_enc.v
│   └── priority_enc_tb.v
├── pulse_sync/      # Pulse Synchronizer (CDC)
│   ├── pulse_sync.v
│   └── pulse_sync_tb.v
└── counter/         # Up/Down Counter
    ├── counter.v
    └── counter_tb.v

IP Portfolio

Module	Category	Params	Description	Verified
rra	Arbitration	N=4	Mask-based Round Robin Arbiter, one-hot grant	✅ iverilog
sync_fifo	Memory	DATA_W=8, DEPTH=4	Synchronous FIFO with full/empty/count	✅ iverilog
edge_detect	Utility	—	Rising/falling/both edge detector	✅ iverilog
priority_enc	Logic	N=8	Parameterized priority encoder with valid flag	✅ iverilog
pulse_sync	CDC	—	Single-pulse clock domain crossing (3-stage sync)	✅ iverilog
counter	Utility	WIDTH=8	Up/down counter with load, overflow/underflow	✅ iverilog

Design Conventions

All reference IPs follow the coding_style skill guidelines:

Verilog-2001, ANSI port declarations
Async active-low reset (rst_n)
always @(*) for combinational, always @(posedge clk or negedge rst_n) for sequential
Self-checking testbenches with PASS/FAIL and ALL_TESTS_PASSED summary
$dumpfile / $dumpvars for waveform capture

Read the full file on GitHub · 79 lines

Files

What ships with it

13 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.

Changes

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.

2d ago First seen · 79 lines · 15 tokens per session scan A 5183a9443690

Subscribe to this mod's changes

ip_reference is a skill published in the GitHub repository ic-star-tech/ccfoundry-agent-kit (24 stars, last pushed 2mo ago), licensed MIT. It adds 15 tokens to every session and 705 once invoked, about $0.0001 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 2026-08-30.

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

babysit-pr

Babysit a GitHub pull request after creation by continuously polling review comments, CI checks/workflow runs, and mergeability state until the PR is merged/closed or user help is required. Diagnose failures, retry likely flaky failures up to 3 times, auto-fix/push branch-related issues when appropriate, and keep…

openai/codex · 114 tokens

imagegen

Generate or edit raster images when the task benefits from AI-created bitmap visuals such as photos, illustrations, textures, sprites, mockups, or transparent-background cutouts. Use when Codex should create a brand-new image, transform an existing image, or derive visual variants from references, and the output…

openai/codex · 113 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

next-cache-components-optimizer

Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…

vercel/next.js · 170 tokens