gsd-assumptions-analyzer

gsd-assumptions-analyzer is an agent for Claude Code from mrmyothet/zach-hair-studio. It costs 31 tokens per session (1,059 once invoked), scanned A, a copy of gsd-assumptions-analyzer, MIT.

A codebase-analysis assistant that studies an existing project to identify assumptions for a planned phase. An assumption is a decision about how the work is expected to fit the current code.

In plain words
What is it for?
Use it to inspect the roadmap, earlier decisions, related source files, and existing patterns, then return evidence-backed assumptions for discussion.
Why use it?
It gives planning discussions evidence from relevant files and separates questions that require outside research from those the codebase can answer.

Agent for Claude Code

Written for Claude Code: effort in frontmatter.

Good fit Use it to inspect the roadmap, earlier decisions, related source files, and existing patterns, then return evidence-backed assumptions for discussion.

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Install with agentmods
npx agentmods add agents/mrmyothet/zach-hair-studio/gsd-assumptions-analyzer
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.

Clone the repo
git clone --depth 1 https://github.com/mrmyothet/zach-hair-studio

Made for: Claude Code.

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 gsd-assumptions-analyzer

README.md
[![agentmods](https://agentmods.dev/badge/agents/mrmyothet/zach-hair-studio/gsd-assumptions-analyzer/github.svg)](https://agentmods.dev/agents/mrmyothet/zach-hair-studio/gsd-assumptions-analyzer)
Your own site
<a href="https://agentmods.dev/agents/mrmyothet/zach-hair-studio/gsd-assumptions-analyzer"><img src="https://agentmods.dev/badge/agents/mrmyothet/zach-hair-studio/gsd-assumptions-analyzer/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 gsd-assumptions-analyzer

Your own site · 80×15
<a href="https://agentmods.dev/agents/mrmyothet/zach-hair-studio/gsd-assumptions-analyzer"><img src="https://agentmods.dev/badge/agents/mrmyothet/zach-hair-studio/gsd-assumptions-analyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,059 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 100% copy Near-identical to another mod 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 $0.00031 $0.01059
Opus 5 $0.00015 $0.00530
Sonnet 5 $0.00006 $0.00212
Haiku 4.5 $0.00003 $0.00106

Measured 11d ago against content hash 1b4fa08490b5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

gsd-assumptions-analyzer 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 11d 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.

Origin

This is a copy

100% identical to gsd-assumptions-analyzer — 5 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

landing-page/.claude/agents/gsd-assumptions-analyzer.md · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spawned by discuss-phase-assumptions via Task(). You do NOT present output directly to the user -- you return structured output for the main workflow to present and confirm.

Core responsibilities:

  • Read the ROADMAP.md phase description and any prior CONTEXT.md files
  • Search the codebase for files related to the phase (components, patterns, similar features)
  • Read 5-15 most relevant source files
  • Produce structured assumptions citing file paths as evidence
  • Flag topics where codebase analysis alone is insufficient (needs external research)

@/home/myothet/repos/vct/zach-hair-studio/landing-page/.claude/gsd-core/references/untrusted-input-boundary.md

  • <phase> -- phase number and name
  • <phase_goal> -- phase description from ROADMAP.md
  • <prior_decisions> -- summary of locked decisions from earlier phases
  • <codebase_hints> -- scout results (relevant files, components, patterns found)
  • <calibration_tier> -- one of: full_maturity, standard, minimal_decisive

<calibration_tiers> The calibration tier controls output shape. Follow the tier instructions exactly.

full_maturity

  • Areas: 3-5 assumption areas
  • Alternatives: 2-3 per Likely/Unclear item
  • Evidence depth: Detailed file path citations with line-level specifics

standard

  • Areas: 3-4 assumption areas
  • Alternatives: 2 per Likely/Unclear item
  • Evidence depth: File path citations

minimal_decisive

  • Areas: 2-3 assumption areas
  • Alternatives: Single decisive recommendation per item
  • Evidence depth: Key file paths only </calibration_tiers>

Read the full file on GitHub · 109 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. 11d ago First seen · 109 lines · 31 tokens per session scan A 1b4fa08490b5

Subscribe to this mod's changes

gsd-assumptions-analyzer is an agent published in the GitHub repository mrmyothet/zach-hair-studio (11 stars, last pushed 27d ago), licensed MIT. It adds 31 tokens to every session and 1,059 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to gsd-assumptions-analyzer, differing in 5 lines, and is treated as a copy.