rtl-conformance-test

rtl-conformance-test is a skill for Claude Code from babyworm/rtl-agent-team. It costs 41 tokens per session (1,792 once invoked), scanned A, original, MIT.

A final test that checks whether video-codec RTL produces the exact bitstream required by an H.264 or H.265 standard. JM and HM are reference software implementations used for comparison.

In plain words
What is it for?
Use it to compare RTL output with JM or HM reference bitstreams using codec conformance test vectors.
Why use it?
Passing ordinary functional tests does not prove standards compliance; exact comparison exposes differences that could make the codec unacceptable.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the rtl-agent-team plugin — 47 skills, 99 agents, 6 hooks shipped together

Good fit Use it to compare RTL output with JM or HM reference bitstreams using codec conformance test vectors.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/babyworm/rtl-agent-team/rtl-conformance-test
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.

Any agent
npx skills add babyworm/rtl-agent-team --skill rtl-conformance-test
Clone the repo
git clone --depth 1 https://github.com/babyworm/rtl-agent-team

Made for: Claude Code.

Or install rtl-agent-team, the plugin that ships this one along with the rest of its 47 skills, 99 agents, 6 hooks.

Wrote 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.

agentmods badge for rtl-conformance-test

README.md
[![agentmods](https://agentmods.dev/badge/skills/babyworm/rtl-agent-team/rtl-conformance-test/github.svg)](https://agentmods.dev/skills/babyworm/rtl-agent-team/rtl-conformance-test)
Your own site
<a href="https://agentmods.dev/skills/babyworm/rtl-agent-team/rtl-conformance-test"><img src="https://agentmods.dev/badge/skills/babyworm/rtl-agent-team/rtl-conformance-test/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.

agentmods 80×15 button for rtl-conformance-test

Your own site · 80×15
<a href="https://agentmods.dev/skills/babyworm/rtl-agent-team/rtl-conformance-test"><img src="https://agentmods.dev/badge/skills/babyworm/rtl-agent-team/rtl-conformance-test.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,792 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00041 $0.01792
Opus 5 $0.00020 $0.00896
Sonnet 5 $0.00008 $0.00358
Haiku 4.5 $0.00004 $0.00179

Measured 6d ago against content hash d4c2593a83eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

rtl-conformance-test 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 6d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/conformance_compare.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/rtl-conformance-test/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

<Use_When>

  • RTL passes functional verification and standards compliance must be confirmed.
  • Codec standard version has changed and re-conformance is required.
  • A specific ITU-T JVT conformance suite must be run against the RTL. </Use_When>

<Do_Not_Use_When>

  • conformance_report.json from ref-model does not exist — run ref-model first.
  • Non-codec RTL design — this skill is specific to video codec standards compliance. </Do_Not_Use_When>

<Why_This_Exists> Standards compliance cannot be inferred from internal functional verification. JM/HM produce the normative reference bitstreams, and bitexact match is the only accepted evidence of conformance for codec IP submitted to standards bodies or licensees. </Why_This_Exists>

Prerequisites

  • conformance_report.json (from ref-model) present — ref model gate must pass first.
  • JM 19.0 (H.264) or HM 16.20 (H.265) installed and on PATH.
  • RTL passes rtl-p5s-func-verify (functional verification complete).
  • Conformance test vectors present at sim/conformance/vectors/.

If missing: WARNING — halt and instruct user to resolve the missing prerequisite before proceeding.

<Responsibility_Boundary>

  • Scripts (conformance_compare.py) handle deterministic byte-level bitstream comparison.
  • LLM handles test vector selection, simulation orchestration, failure diagnosis, and spec-section attribution.
  • Contract surface: 100% bitexact match required; any divergence is a hard FAIL with byte offset + hex values recorded. </Responsibility_Boundary>

Apply steps 1-7 to every requested vector suite — do not stop after the first.

<Tool_Usage>

Task(subagent_type="rtl-agent-team:vcodec-syntax-entropy-expert",
     prompt="Select H.264 conformance test vectors applicable to CABAC encoder. "
            "List vector files and JM version to use.")

Task(subagent_type="rtl-agent-team:eda-runner",
     prompt="Run RTL conformance simulation via Bash CLI for each vector in "
            "sim/conformance/vectors/. Compile and run: "
            "scripts/run_sim.sh --sim iverilog --top tb_cabac_conformance "
            "--outdir sim/conformance --trace rtl/cabac_encoder/cabac_encoder.sv "
            "sim/top/tb_cabac_conformance.sv. "
            "Compare output with JM 19.0: "
            "cmp -l sim/conformance/rtl_output.bin sim/conformance/ref/jm_output.bin. "
            "Report PASS/FAIL per vector with divergence byte offset.")

Task(subagent_type="rtl-agent-team:func-verifier",
     prompt="Validate sim/conformance/results.json: verify all vectors ran, all have status, "
            "every FAIL has divergence_byte and expected_hex/actual_hex fields.")

</Tool_Usage>

Read the full file on GitHub · 123 lines

Files

What ships with it

5 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.

  1. 6d ago First seen · 123 lines · 41 tokens per session scan A d4c2593a83eb

Subscribe to this mod's changes

rtl-conformance-test is a skill published in the GitHub repository babyworm/rtl-agent-team (51 stars, last pushed 17d ago), licensed MIT. It adds 41 tokens to every session and 1,792 once invoked, about $0.0002 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 2026-09-03.