code-synthesizer

code-synthesizer is a skill for Claude Code, Codex from sequenzia/agent-alchemy. It costs 26 tokens per session (2,690 once invoked), scanned A, original, MIT.

An analysis agent that combines findings from multiple codebase investigations into one structured technical report.

In plain words
What is it for?
Use it to investigate architecture, trace how components connect, ask targeted follow-up questions, and produce an actionable analysis.
Why use it?
It reduces duplicate or conflicting exploration results and highlights missing information, risks, and relationships between parts of a codebase.

Skill for Claude CodeCodex

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 skills/sequenzia/agent-alchemy/code-synthesizer
Any agent
npx skills add sequenzia/agent-alchemy --skill code-synthesizer
Clone the repo
git clone --depth 1 https://github.com/sequenzia/agent-alchemy

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 code-synthesizer

README.md
[![agentmods](https://agentmods.dev/badge/skills/sequenzia/agent-alchemy/code-synthesizer.svg)](https://agentmods.dev/skills/sequenzia/agent-alchemy/code-synthesizer)
Your own site
<a href="https://agentmods.dev/skills/sequenzia/agent-alchemy/code-synthesizer"><img src="https://agentmods.dev/badge/skills/sequenzia/agent-alchemy/code-synthesizer.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,690 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 5.1 $0.00026 $0.02690
Opus 5 $0.00013 $0.01345
Sonnet 5 $0.00005 $0.00538
Haiku 4.5 $0.00003 $0.00269

Measured 2d ago against content hash bd88a64459f8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

code-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 2d 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.

ported/20260304-102613/core-tools/skills/code-synthesizer/SKILL.md · 279 lines

How it starts

The opening of the file, as written. The whole thing — 279 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Synthesizer

When invoked, perform the following synthesis tasks as a codebase analysis specialist working as part of a collaborative analysis team. Synthesize raw exploration findings from multiple exploration workers into a unified, actionable analysis -- with the ability to ask explorers follow-up questions, investigate gaps directly using shell commands, and evaluate completeness before finalizing.

Prerequisites

Before beginning synthesis, ensure familiarity with:

  • project-conventions -- For understanding the target codebase's conventions
  • language-patterns -- For recognizing language-specific patterns in findings
  • technical-diagrams -- For creating Mermaid diagrams in the synthesis output

Mission

Given exploration reports from multiple workers:

  1. Merge and deduplicate findings across all reports
  2. Identify conflicts and gaps in the reports
  3. Ask explorers targeted follow-up questions to resolve issues
  4. Read critical files to deepen understanding
  5. Investigate gaps directly using shell commands when needed (git history, dependency trees, static analysis)
  6. Map relationships between components
  7. Identify patterns, conventions, and risks
  8. Evaluate completeness -- are critical areas adequately covered?
  9. Produce a structured synthesis for reporting

Session Awareness

When working in a session-enabled deep-analysis run, persisted explorer findings may be available:

  1. Check for .agents/sessions/__da_live__/explorer-{N}-findings.md files
  2. If found, read these files to supplement or replace task-based finding retrieval
  3. Read .agents/sessions/__da_live__/checkpoint.md for session state context (analysis context, codebase path, explorer names)
  4. For recovered sessions (where the synthesizer is started fresh after interruption): rely on the persisted findings files as the primary source of explorer output, since the original explorers may no longer be available for follow-up questions

Interactive Synthesis

Unlike a passive synthesizer, you can communicate with the explorers who produced the findings and investigate directly.

Read the full file on GitHub · 279 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. 2d ago First seen · 279 lines · 26 tokens per session scan A bd88a64459f8

Subscribe to this mod's changes

code-synthesizer is a skill published in the GitHub repository sequenzia/agent-alchemy (44 stars, last pushed 3mo ago), licensed MIT. It adds 26 tokens to every session and 2,690 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 2026-09-03.

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