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 Jody09-dotcom/constructionx-skills --skill cdm-2015-checkgit clone --depth 1 https://github.com/Jody09-dotcom/constructionx-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/jody09-dotcom/constructionx-skills/cdm-2015-check)<a href="https://agentmods.dev/skills/jody09-dotcom/constructionx-skills/cdm-2015-check"><img src="https://agentmods.dev/badge/skills/jody09-dotcom/constructionx-skills/cdm-2015-check/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/jody09-dotcom/constructionx-skills/cdm-2015-check"><img src="https://agentmods.dev/badge/skills/jody09-dotcom/constructionx-skills/cdm-2015-check.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 | $0.00098 | $0.01501 |
| Opus 5 | $0.00049 | $0.00750 |
| Sonnet 5 | $0.00020 | $0.00300 |
| Haiku 4.5 | $0.00010 | $0.00150 |
Grade A, and why
cdm-2015-check 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 10d 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 — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CDM 2015 Check
This skill produces a one-page CDM 2015 brief for a UK construction project. It checks F10 notifiability, lists the duty-holders that apply, and produces Pre-Construction Information (PCI) and Construction Phase Plan (CPP) checklists. Advisory only. HSE is the authoritative source. For formal compliance, engage a qualified CDM coordinator or chartered construction professional.
When to Use
- New project scoping, before tender or contract signing
- Tender stage, checking what the client must provide
- Due-diligence review on a project you are about to take on
- Client education, explaining CDM duties to a commercial or domestic client
- Checking F10 notifiability for a project you are mid-way through planning
Workflow
Phase 1, ask project facts.
- Project description and scope
- Duration in working days (elapsed)
- Peak workforce on site at any one time
- Client type: commercial, public sector, domestic (i.e. private householder for their own dwelling)
- Is there more than one contractor on site (including subbies)? Yes/No
- Location and environmental factors (live building, public nearby, rail/road adjacency)
Phase 2, apply F10 notifiability test.
Under CDM 2015 Regulation 6, a project is notifiable to HSE via Form F10 if either:
- It is expected to last longer than 30 working days AND have more than 20 workers working simultaneously at any point, OR
- It is expected to exceed 500 person-days.
If either threshold is met, F10 notification is required. The client is the duty-holder for submitting the F10, but in practice the Principal Designer or Principal Contractor often prepares it.
Reference references/cdm-2015-duty-holders.md for the exact HSE wording and guidance.
Phase 3, list duty-holders.
Apply the CDM 2015 roles:
- Client (always). Domestic clients: their duties pass to the contractor (single-contractor) or Principal Contractor (multi-contractor). Commercial clients: full duties apply.
- Principal Designer. Required when more than one contractor is on site. Appointed in writing by the client.
- Principal Contractor. Required when more than one contractor is on site. Appointed in writing by the client.
- Designers. Anyone preparing or modifying a design, including temporary works designers and specifier-subcontractors.
- Contractors. Anyone managing or carrying out construction work.
- Workers. Operatives on site.
What ships with it
1 file 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.
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.
- 10d ago First seen · 132 lines · 98 tokens per session scan A 5e4970a3b250
cdm-2015-check is a skill published in the GitHub repository Jody09-dotcom/constructionx-skills (1 stars, last pushed 4mo ago), licensed MIT. It adds 98 tokens to every session and 1,501 once invoked, about $0.0005 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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