intersynth

intersynth

Multi-agent synthesis engine for Claude Code.

What this does

When interflux dispatches 5 review agents in parallel, each one writes its findings to a file. Without synthesis, the host agent has to read all 5 files: flooding its context with thousands of tokens of agent output. intersynth sits between the parallel agents and the host, reading their output files, deduplicating findings, writing structured verdicts, and returning a compact 10-line summary.

Two specialized synthesis agents handle the different contracts: synthesize-review for code reviews and flux-drive output, synthesize-research for flux-research findings. They're separate because review verdicts have different structure than research findings, and one generic synthesizer would do neither well.

Installation

First, add the interagency marketplace (one-time setup):

/plugin marketplace add mistakeknot/interagency-marketplace

Then install the plugin:

/plugin install intersynth

Architecture

agents/
  synthesize-review.md      Review output synthesis
  synthesize-research.md    Research output synthesis
hooks/
  lib-verdict.sh            Verdict file utilities (write, read, parse, count, clean)

Uses Haiku by default: synthesis is structuring and deduplication, not deep reasoning.

lib-verdict.sh provides the canonical verdict file format: verdict_write, verdict_read, verdict_parse_all, verdict_count_by_status, verdict_get_attention, verdict_clean, verdict_total_tokens. Clavain keeps a backward-compat copy.

Design decisions

• Verdict files are ephemeral: cleaned at sprint start, never committed to git
• The 10-line summary constraint is intentional: if synthesis can't compress findings into 10 lines, the agents produced too much noise
• Two agents, not one, because the review and research synthesis contracts are fundamentally different