A reporting tool for measuring a coding session’s output tokens and estimated carbon dioxide emissions. It also reports a model-based comparison with a run that did not use Honey, when a matching benchmark exists.

Run it to report session token counts, CO₂-equivalent emissions, and any supported counterfactual savings with their stated basis.

It avoids hand-calculated or unsupported claims about token and carbon savings. The report distinguishes measured emissions from modelled comparisons.

honey-eco — Skill for Claude Code by Green-PT

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo

git clone --depth 1 https://github.com/Green-PT/honey-for-devs

agentmods

npx agentmods add skills/green-pt/honey-for-devs/honey-eco

Made for: Claude Code.

Or install honey, the plugin that ships this one along with the rest of its 14 skills, 3 agents, 3 hooks.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/green-pt/honey-for-devs/honey-eco/github.svg)](https://agentmods.dev/skills/green-pt/honey-for-devs/honey-eco)

Your own site

<a href="https://agentmods.dev/skills/green-pt/honey-for-devs/honey-eco"><img src="https://agentmods.dev/badge/skills/green-pt/honey-for-devs/honey-eco/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/green-pt/honey-for-devs/honey-eco"><img src="https://agentmods.dev/badge/skills/green-pt/honey-for-devs/honey-eco.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 554 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.

Model	Per session	Once invoked
Fable 5.1	$0.00018	$0.00554
Opus 5	$0.00009	$0.00277
Sonnet 5	$0.00004	$0.00111
Haiku 4.5	$0.00002	$0.00055

Measured 11d ago against content hash a709266f1ea4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

honey-eco 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.

.hermes/skills/honey-eco/SKILL.md · 52 lines

How it starts

The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Honey Eco

Surface the numbers the carbon badge is based on. Never estimate by hand — run the committed report so the figure matches hooks/eco.js (the verified EcoLogits v0.8.2 port) exactly.

Do

Run, from the repo root — zero-dependency, reuses the same hooks/eco.js the badge uses:

node scripts/eco-session.js              # newest session
node scripts/eco-session.js --transcript PATH --mode full

Then report terse — output tokens, CO₂eq (g), and the saved line — in a line or two. Keep the exact numbers the script prints; don't round away precision.

Two numbers, two epistemic statuses — never merge them

CO₂eq is measured for this session: real output tokens through the EcoLogits port.
saved is not. It is a modelled counterfactual — how many tokens a no-Honey run would have emitted — taken from a committed bench stamp. Always pass through the basis: line the script prints (stamp, model, n, p). Never state a savings figure without it, and never re-derive one by hand.

When the script prints saved : —, no committed stamp covers this session's model. Say that. Do not extrapolate from another model's ratio — that is exactly how a tool ends up reporting savings while the invoice goes up.

For the authoritative breakdown (usage + embodied + primary energy) the user can run the Python path, which needs the real package:

pip install ecologits && python scripts/eco_report.py

Say once, don't bury

The params are speculative (Anthropic discloses none). The badge shows served impact — EcoLogits' single-stream (batch-1) ceiling divided by serving_concurrency (continuous-batching amortization); eco-session.js/eco_report.py also print the raw ceiling. State that once, briefly, then give the number. The badge renders only in Claude Code (its transcript is all Claude models).

Boundaries

Report only — don't change config or mode (that's the /honey command). The number is a range, not a meter reading; present it as one.

Read the full file on GitHub · 52 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.

11d ago First seen · 52 lines · 18 tokens per session scan A a709266f1ea4

Subscribe to this mod's changes

honey-eco is a skill published in the GitHub repository Green-PT/honey-for-devs (294 stars, last pushed 3d ago), licensed MIT. It adds 18 tokens to every session and 554 once invoked, about $0.0001 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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