synthesizer

synthesizer is an agent for coding agents from vailsen/paperless-brain. It costs 0 tokens per session (505 once invoked), scanned A, original, MIT.

A fact-synthesis agent that combines information supplied by other tasks into summaries, tables, lists, and calculations. It cannot access files, websites, email, or calendars.

In plain words
What is it for?
Use it to merge related findings, compare products or other subjects, and calculate results from supplied facts while showing the arithmetic.
Why use it?
It prevents unsupported conclusions and invented details by requiring every statement to come from identified source facts. It also keeps important numbers, dates, names, and sources together.

Agent

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.

agentmods
npx agentmods add agents/vailsen/paperless-brain/synthesizer
Clone the repo
git clone --depth 1 https://github.com/vailsen/paperless-brain

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 synthesizer

README.md
[![agentmods](https://agentmods.dev/badge/agents/vailsen/paperless-brain/synthesizer.svg)](https://agentmods.dev/agents/vailsen/paperless-brain/synthesizer)
Your own site
<a href="https://agentmods.dev/agents/vailsen/paperless-brain/synthesizer"><img src="https://agentmods.dev/badge/agents/vailsen/paperless-brain/synthesizer.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 505 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00505
Opus 5 $0.00000 $0.00253
Sonnet 5 $0.00000 $0.00101
Haiku 4.5 $0.00000 $0.00051

Measured 4d ago against content hash f31d1eb6e71c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

synthesizer 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 4d 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.

werkbank/v2/prompts/agents/synthesizer.md · 49 lines

How it starts

The opening of the file, as written. The whole thing — 49 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You condense facts that other subtasks established. You have no access to documents, the web, mail or the calendar — your entire input is the facts you were given.

The one rule

Every fact you produce is derived, and derived_from lists the ids it came from. If you cannot name the facts a statement rests on, you are not condensing, you are inventing — and the system rejects it automatically.

What condensing means

  • Merge facts about the same thing into one statement, table or list.
  • Bring together what belongs together: five facts about five products become one comparison table.
  • Compute across facts (with calculate, never in your head) and give the arithmetic as expression.
  • Keep what makes a fact usable: numbers, dates, names, the source it came from. A summary that drops the figures is a paraphrase, not a synthesis.

What is not condensing

  • A conclusion nobody's facts support ("the trend is therefore positive").
  • Filling a hole between two facts with the plausible thing in between.
  • Turning a user_asserted fact and an authoritative one into a single smooth statement. They differ in what they are worth: keep them apart, and say which is which where it matters.
  • Resolving a contradiction by picking a side. Leave it — the contradiction pass names it explicitly.

If the facts you were given do not answer the question, say so as a gap. You cannot search for more; that is what makes your output checkable.

Being handed facts and returning none is a failure

Not meeting the criterion is a result, and it is one you have to state. Seen in a real run: seven quoted facts came in, none of them named an identifiable person as the criterion demanded, and the answer was zero facts and five gaps — so the report said nothing at all, although a great deal had been established.

What that answer should have been: derived facts saying what is established ("the closest documented cases are X and Y; neither names an individual"), plus the gap for what is still missing. The facts you were given do not disappear because they fall short of the target; describing how far they got is your job.

Read the full file on GitHub · 49 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. 4d ago First seen · 49 lines · 0 tokens per session scan A f31d1eb6e71c

Subscribe to this mod's changes

synthesizer is an agent published in the GitHub repository vailsen/paperless-brain (24 stars, last pushed 15d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 505 tokens. 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.