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jermes

MersivMedia/jermes

Jev decision layer for Hermes Agent cuts cost 39%

Automated README summary

Automatically summarized from the README on 28 Sept 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.

What it is

Jermes is a Hermes Agent plugin that offloads small, bounded decisions from the expensive reasoning model to Jev, TypeSafe AI's System One model. It trims context, gates risky tool calls, selects skills, filters memory, and more, saving cost while keeping answers correct.

How it uses Jev

Jev makes decisions like which old context to keep, whether a tool call is dangerous, which skill to load, whether a memory write is durable, and if the agent is looping. Plain code asks Jev with typed questions and uses returned probabilities with thresholds to act, ask, or leave Hermes alone.

Primitives:choicescorenoul

Technique worth stealing

Use Jev to make bounded decisions with calibrated probabilities, then apply code thresholds to act, ask, or do nothing.

Try it

Install Hermes Agent, then run: hermes plugins install MersivMedia/jermes --enable

View on GitHub

Start using Jev: API key and your first request →

Model judgments from README excerpts

Project signals use repository metadata, an existing summary and the first 700 README characters, not the full project. “Not found” means not detected in that material; it does not establish absence. These are the original judgments with recorded models and dates, not source audits or run results.

Models & evaluation dates

Inclusion gate
jev-1.13.0
Project signals
jev-1.13.0
Category
jev-1.13.0
Pattern tags
jev-1.13.0

Evidence

These signals use repository metadata, an existing summary and at most 700 cleaned README characters. ≥ 0.60 means reported in that excerpt; ≤ 0.40 means not found there. The middle band is inconclusive. None is a source-code audit or a test result. The runnable-tool question excludes research experiments; the recommendation question asks for a learning shortlist, not a quality verdict.

  • Jev is core to the projectFound in material0.74
  • Shows a System One patternnot found in the excerpt0.26
  • Describes handling uncertaintynot found in the excerpt0.06
  • Reports measured numbersFound in material0.98
  • Is a runnable toolunclear0.60
  • Top-10 learning shortlist signalnot found in the excerpt0.29
  • Is a replica of the modelunclear0.44
  • Solves a common problem (0–2)score on a 0–2 scale1.17 / 2
  • About JevFound in material0.98
Signals
Jev is core to the project0.74Shows a System One pattern0.26Describes handling uncertainty0.06Reports measured numbers0.98Is a runnable tool0.60Top-10 learning shortlist signal0.29Is a replica of the model0.4400.51Solves a common problem (0–2)1.17 / 2012

no-judgment band (0.40–0.60)

Design patterns
Fail open, fail closed0.90Funnel0.89Check-up0.76Traffic light0.59Flight recorder0.49Menu0.31Grey zone0.27Viewfinder0.2200.51

no-judgment band (0.40–0.60)

The Jev model and date for each judgment stage are listed above. Card written by DeepSeek V4.1 Flash from the README on 28 Sept 2026.