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 tjdrhs90/flutter-flame-harness --skill flame-harness-designgit clone --depth 1 https://github.com/tjdrhs90/flutter-flame-harnessWrote 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/tjdrhs90/flutter-flame-harness/flame-harness-design)<a href="https://agentmods.dev/skills/tjdrhs90/flutter-flame-harness/flame-harness-design"><img src="https://agentmods.dev/badge/skills/tjdrhs90/flutter-flame-harness/flame-harness-design/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/tjdrhs90/flutter-flame-harness/flame-harness-design"><img src="https://agentmods.dev/badge/skills/tjdrhs90/flutter-flame-harness/flame-harness-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00038 | $0.03932 |
| Opus 5.5 | $0.00015 | $0.01573 |
| Sonnet 5.5 | $0.00008 | $0.00786 |
| Haiku 4.5 | $0.00004 | $0.00393 |
Grade A, and why
flame-harness-design 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 2mo 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 — 388 lines — stays where its author put it; the contents beside it link to each section on GitHub.
flame-harness-design
Phase 3 of the flutter-flame-harness pipeline. Reads the latest PRD and config.md, then
produces a design document that specifies the lib/ui/design_tokens.dart constants, the
game's visual/art concept, and the asset and audio sourcing plan (including launcher icon and
splash screen intent). Advances pipeline state to contract.
All file schemas (config.md, state.md, pipeline-log.md) and the phase transition table
are defined in docs/harness-protocol.md — refer to that document as the single source of
truth (§2 for state.md schema; §7 for the design → contract transition). Do not redefine
schemas here.
Input
1. Read docs/harness/config.md
Extract:
| Key | Use |
|---|---|
app_idea |
Informs visual tone (action vs. casual vs. puzzle) |
app_name |
Used in splash screen heading and icon badge |
app_slug |
Used to derive asset directory naming conventions |
default_language |
The user's conversation language; write copy samples in it |
If config.md does not exist, abort with:
flame-harness-design: docs/harness/config.md not found — run the orchestrator to bootstrap first.
2. Read the latest PRD
Find the most recent file matching docs/harness/plans/*-prd.md (sort descending by filename,
take the first). If no PRD exists, abort with:
flame-harness-design: no PRD found in docs/harness/plans/ — run flame-harness-plan first.
Extract from the PRD:
- Genre & core mechanic — informs colour mood (e.g., dark sci-fi vs. bright hyper-casual)
- Target age / tone — age rating and energy level of the visual style
- Monetisation hook — AdMob placement type (banner at bottom → affects HUD spacing)
- Win/lose conditions — informs what UI states need distinct visual treatment
Design tokens
Write a specification for lib/ui/design_tokens.dart that a generator phase Claude can
implement verbatim as const Dart values. The spec must cover every sub-section below.
Colour palette
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.
- 2mo ago First seen · 388 lines · 38 tokens per session scan A f86dd3a5b3fe
flame-harness-design is a skill published in the GitHub repository tjdrhs90/flutter-flame-harness (61 stars, last pushed 3d ago), licensed MIT. It adds 38 tokens to every session and 3,932 once invoked, about $0.0002 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 2026-08-30.
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