derive-instead-of-transcribing

derive-instead-of-transcribing is a skill for Claude Code, Codex from brcampidelli/chimera-agent. It costs 37 tokens per session (565 once invoked), scanned A, original, Apache-2.0.

A development practice for keeping repeated information in sync by generating one copy from another, such as client types from a schema or documentation from configuration.

In plain words
What is it for?
Use it when two files contain the same information and one can be treated as the source. It helps set up generation, committed outputs, and checks that fail when outputs are outdated.
Why use it?
It removes the risk of manually updating duplicate files and forgetting one. A build check exposes stale generated files before they are shipped.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when two files contain the same information and one can be treated as the source. It helps set up generation, committed outputs, and checks that fail when outputs are outdated.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/brcampidelli/chimera-agent/derive-instead-of-transcribing
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 brcampidelli/chimera-agent --skill derive-instead-of-transcribing
Clone the repo
git clone --depth 1 https://github.com/brcampidelli/chimera-agent

Made for: Claude Code, Codex.

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 derive-instead-of-transcribing

README.md
[![agentmods](https://agentmods.dev/badge/skills/brcampidelli/chimera-agent/derive-instead-of-transcribing/github.svg)](https://agentmods.dev/skills/brcampidelli/chimera-agent/derive-instead-of-transcribing)
Your own site
<a href="https://agentmods.dev/skills/brcampidelli/chimera-agent/derive-instead-of-transcribing"><img src="https://agentmods.dev/badge/skills/brcampidelli/chimera-agent/derive-instead-of-transcribing/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 derive-instead-of-transcribing

Your own site · 80×15
<a href="https://agentmods.dev/skills/brcampidelli/chimera-agent/derive-instead-of-transcribing"><img src="https://agentmods.dev/badge/skills/brcampidelli/chimera-agent/derive-instead-of-transcribing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 565 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 $0.00037 $0.00565
Opus 5 $0.00018 $0.00282
Sonnet 5 $0.00007 $0.00113
Haiku 4.5 $0.00004 $0.00056

Measured 11d ago against content hash 8b9a25705790, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

derive-instead-of-transcribing 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 11d 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.

skills/derive-instead-of-transcribing/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Trigger

Two places in your system hold the same information: a config and its documentation, a schema and its client types, a palette and the site that uses it, a command list and a reference page.

It does not apply when the second copy is deliberately different — a curated getting-started guide is not a stale copy of the reference, it is prose with a different job.

Do

  1. Pick which one is the source. Usually the one the program actually reads at runtime.
  2. Generate the other, committing the generated file so diffs are reviewable.
  3. Add a CI step that regenerates and fails if the committed copy differs, with the exact command to run in the error message.
  4. Stamp the generated file with the version or commit it was generated from, so a reader knows what it describes.

Avoid

Keeping the copy in sync by remembering. That works while one person holds both files in their head, and stops the first week somebody else touches one of them.

Avoid also the halfway version: generating the file but not gating it. An artefact that is sometimes regenerated is worse than a hand-written one, because it carries the authority of being generated while being just as stale.

And avoid generating prose. Reference material generates well; explanation does not, and a page of mechanically-expanded field descriptions is a page nobody reads.

Check

Change the source, do not regenerate, and push. CI must go red and tell you what to run.

Then read the generated file for the thing you changed and confirm it is there — the gate proves the file is current, not that the generator captured the field you care about.

Risk

A generated artefact that nobody can read defeats the purpose; if the output is only meaningful to a machine, it needs a rendering layer, which is more code to maintain.

There is also a coupling cost. The consumer now depends on the producer's shape, and a refactor on one side breaks a build on the other. That is usually the point — but it means the gate has to be easy to satisfy, or someone will disable it during an unrelated refactor and forget.

Read the full file on GitHub · 62 lines

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. 11d ago First seen · 62 lines · 37 tokens per session scan A 8b9a25705790

Subscribe to this mod's changes

derive-instead-of-transcribing is a skill published in the GitHub repository brcampidelli/chimera-agent (23 stars, last pushed today), licensed Apache-2.0. It adds 37 tokens to every session and 565 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 2026-08-30.

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