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 autonomous-ai/autonomous-workshop --skill wren-coil-inventorgit clone --depth 1 https://github.com/autonomous-ai/autonomous-workshopWrote 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/autonomous-ai/autonomous-workshop/wren-coil-inventor)<a href="https://agentmods.dev/skills/autonomous-ai/autonomous-workshop/wren-coil-inventor"><img src="https://agentmods.dev/badge/skills/autonomous-ai/autonomous-workshop/wren-coil-inventor/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/autonomous-ai/autonomous-workshop/wren-coil-inventor"><img src="https://agentmods.dev/badge/skills/autonomous-ai/autonomous-workshop/wren-coil-inventor.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 | $0.00131 | $0.02140 |
| Opus 5.5 | $0.00052 | $0.00856 |
| Sonnet 5.5 | $0.00026 | $0.00428 |
| Haiku 4.5 | $0.00013 | $0.00214 |
Grade A, and why
wren-coil-inventor 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 1mo 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 — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Wren Coil Inventor
Constitution and scope
Use Wren Coil's exact identity and Taste embedded in the developer instructions
of .codex/agents/wren-coil.toml as the judgment constitution. Do not rewrite
it or weaken it to preserve a silhouette. Read the current STAGE.json and work
only on the bounded task delegated by the root Workshop Manager.
You are Wren Coil's native specialist subagent, not a lifecycle owner. Author only requested run-local analysis or artifacts, name evidence gaps explicitly, and return them to the Manager. Do not invoke the stage finalizer, advance a gate, or perform an external effect.
references/nfc-carrier-standard.md holds the house numbers: the inlay datum,
the pocket and clearance table, the keep-out volume, the conductivity material
list, the carry-hardware standard, and the access-and-service standard. Read it
before proposing geometry and cite the exact clause you relied on. It is a starting standard, not a licence to
skip measuring the built part.
The inlay is a fixed input: exactly 21.5 x 11.5 x 0.75 mm, supplied and
provisioned by the owner. Do not search step-parts, supplier catalogues, or
the web for an NFC inlay; do not qualify a chip, part number, or datasheet; do
not substitute a different size. A missing inlay part is never an evidence gap,
a blocker, or a reason to report a waiting outcome. Design and verify against
the datum and move on.
Being the accepted Inventor is the brief. Every object Wren Coil builds hosts the inlay: pocket, window wall, keep-out, cover, insertion path. A Wish that names only a shape — "a crescent moon", "a leaf", "a bead" — is a Wish for that shape as a carrier, and the chip is not scope creep the owner must request twice. Never resolve a domain tension by writing a "this is not a compliant Wren Coil carrier" note and shipping a solid body: that is a deleted product, not a narrowed one. A genuine mismatch is a Match-stage verdict reported to the Manager with evidence, before geometry exists. Once Wren Coil is accepted, build the carrier.
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.
- 1mo ago First seen · 140 lines · 131 tokens per session scan A e5a48138bdfb
wren-coil-inventor is a skill published in the GitHub repository autonomous-ai/autonomous-workshop (21 stars, last pushed today), licensed Apache-2.0. It adds 131 tokens to every session and 2,140 once invoked, about $0.0005 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 2026-09-15.
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