bayesian-synthesis

bayesian-synthesis is a skill for Claude Code, Codex from Ridwannurudeen/hermes-council. It costs 29 tokens per session (878 once invoked), scanned A, original, MIT.

A method for combining evidence while showing how confident you are. Bayesian reasoning starts with an initial belief, updates it as evidence arrives, and produces a final belief with remaining uncertainties.

In plain words
What is it for?
Use it for forecasting, comparing options, combining studies or viewpoints, and checking whether your confidence matches the available evidence. Important decisions can be sent to the Arbiter persona for synthesis.
Why use it?
It makes uncertain decisions easier to inspect instead of hiding assumptions behind a confident conclusion. It also shows what new information could change the decision.

Skill for Claude CodeCodex

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

Good fit Use it for forecasting, comparing options, combining studies or viewpoints, and checking whether your confidence matches the available evidence. Important decisions can be sent to the Arbiter persona for synthesis.

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Install with agentmods
npx agentmods add skills/ridwannurudeen/hermes-council/bayesian-synthesis
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 Ridwannurudeen/hermes-council --skill bayesian-synthesis
Clone the repo
git clone --depth 1 https://github.com/Ridwannurudeen/hermes-council

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 bayesian-synthesis

README.md
[![agentmods](https://agentmods.dev/badge/skills/ridwannurudeen/hermes-council/bayesian-synthesis/github.svg)](https://agentmods.dev/skills/ridwannurudeen/hermes-council/bayesian-synthesis)
Your own site
<a href="https://agentmods.dev/skills/ridwannurudeen/hermes-council/bayesian-synthesis"><img src="https://agentmods.dev/badge/skills/ridwannurudeen/hermes-council/bayesian-synthesis/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 bayesian-synthesis

Your own site · 80×15
<a href="https://agentmods.dev/skills/ridwannurudeen/hermes-council/bayesian-synthesis"><img src="https://agentmods.dev/badge/skills/ridwannurudeen/hermes-council/bayesian-synthesis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 878 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.
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 $0.00029 $0.00878
Opus 5 $0.00015 $0.00439
Sonnet 5 $0.00006 $0.00176
Haiku 4.5 $0.00003 $0.00088

Measured 12d ago against content hash 061ddb93b27a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

bayesian-synthesis 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 12d 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/council/bayesian-synthesis/SKILL.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bayesian Synthesis

The Arbiter persona uses explicit Bayesian reasoning to synthesize multiple perspectives into a calibrated verdict. Use this approach when you need to make decisions under uncertainty.

The Bayesian Method

  1. State your prior: What do you believe before seeing any arguments? (0-100%)
  2. Update on evidence: For each new piece of evidence, adjust your belief
  3. State your posterior: Final belief after all updates, with confidence interval
  4. Identify remaining uncertainty: What would change your mind?

When to Use

  • Decision-making under uncertainty: Multiple valid options, unclear trade-offs
  • Forecasting: Predicting outcomes with limited information
  • Evidence synthesis: Combining multiple studies or data sources
  • Belief calibration: Checking if your confidence matches available evidence

How to Use

Full Council (recommended for important decisions)

council_query(
    question="What is the probability that Ethereum's market cap surpasses Bitcoin's by 2028?",
    context="Consider technical fundamentals, adoption metrics, regulatory landscape, and historical precedent."
)

The Arbiter's synthesis will include:

  • PRIOR: Starting belief before arguments
  • EVIDENCE UPDATES: How each persona's argument shifts the belief
  • POSTERIOR: Final calibrated estimate
  • KEY DISAGREEMENTS: Unresolved tensions
  • FINAL VERDICT: Actionable recommendation

Quick Evaluation

council_evaluate(
    content="[your analysis here]",
    question="Is this analysis well-calibrated?",
    criteria=["calibration", "evidence_quality", "uncertainty_handling"]
)

Claim Review With Evidence

council_review_claim(
    claim="This library supports JSON mode on every OpenAI-compatible provider",
    context="We plan to rely on response_format for production parsing",
    evidence_search=true
)

Use verified_sources for retrieved evidence. Treat URLs in sources as model-cited unless they also appear in verified_sources.

Read the full file on GitHub · 100 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. 12d ago First seen · 100 lines · 29 tokens per session scan A 061ddb93b27a

Subscribe to this mod's changes

bayesian-synthesis is a skill published in the GitHub repository Ridwannurudeen/hermes-council (50 stars, last pushed 4mo ago), licensed MIT. It adds 29 tokens to every session and 878 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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