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 dkadts/landing-kit-building --skill design-lockgit clone --depth 1 https://github.com/dkadts/landing-kit-buildingWrote 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/dkadts/landing-kit-building/design-lock)<a href="https://agentmods.dev/skills/dkadts/landing-kit-building/design-lock"><img src="https://agentmods.dev/badge/skills/dkadts/landing-kit-building/design-lock/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/dkadts/landing-kit-building/design-lock"><img src="https://agentmods.dev/badge/skills/dkadts/landing-kit-building/design-lock.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 | $0.00062 | $0.01364 |
| Opus 5 | $0.00031 | $0.00682 |
| Sonnet 5 | $0.00012 | $0.00273 |
| Haiku 4.5 | $0.00006 | $0.00136 |
Grade A, and why
design-lock 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 9d 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 — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/design-lock
Pivotal moment of the workflow. Before this: research and decisions. After this: build only.
Fills DESIGN-LOCK.md — the design constitution that gets frozen and does not change without explicit override.
When to use
- After
/refs(there is a proposal with reasons). - OR after
/brief+/copy-analyzeif there are no references. - Before
/tokensand/build(they refuse to work without LOCK).
Requirements
Verify readiness:
brief/00-priority.md— LOCKED (desktop-first / mobile-first).brief/01-business.md— filled (niche, competitors).brief/05-design.md— filled (mood, associations).brief/copy-analysis.md— exists (affects length, tone, section structure).references/proposal.md— exists (if/refsalready ran).references/approved-manifest.md— exists (created by/refs; empty is fine).
If anything is missing — offer to run what's missing first.
Process
Walk the 9 DESIGN-LOCK.md sections strictly in order. Each is a separate dialog.
For every section:
- Show the current proposed values (from
references/proposal.mdif present, else frombrief/05-design.md). - Explain briefly why these values (one sentence).
- Show a preview — generate a mini-HTML example right in the message:
- For type — a block with H1, H2, body using the actual fonts.
- For color — palette tiles with HEX values.
- For radius — 3 squares with different radii for comparison.
- For spacing — a visual scale.
- For motion — describe (ease + duration) + offer a URL of a site with the example.
- Ask: accept / change / show alternatives.
- If "change" — offer 3 variants, let user pick.
- Write the final value to
DESIGN-LOCK.md, markSTATUS: LOCKED.
Section order (by dependency):
- Spacing — base of everything.
- Type scale — depends on spacing.
- Color — independent.
- Radius — independent (but should match density).
- Motion — independent, but should match mood.
- Density — affects spacing multipliers.
- Photography — independent.
- Section vocabulary — depends on structure from
/copy-analyze. - Anti-patterns — all on by default; only disable with a reason.
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.
- 9d ago First seen · 127 lines · 62 tokens per session scan A dc794d074464
design-lock is a skill published in the GitHub repository dkadts/landing-kit-building (2 stars, last pushed 21d ago), licensed MIT. It adds 62 tokens to every session and 1,364 once invoked, about $0.0003 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 2026-08-31.
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