What is pessimistic-reviewer?

A fresh-context reviewer that checks proposed code changes against project instructions, architecture decisions, and package-specific rules with a deliberately skeptical approach.

Use it as a final review before creating a pull request, especially for checking whether a branch follows the repository’s documented rules.

It can catch problems that may be missed by someone familiar with the implementation discussion.

pessimistic-reviewer — Agent for Claude Code by gorillabiscuit

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/gorillabiscuit/AI-assisted-project-starter

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/gorillabiscuit/ai-assisted-project-starter/pessimistic-reviewer/github.svg)](https://agentmods.dev/agents/gorillabiscuit/ai-assisted-project-starter/pessimistic-reviewer)

Your own site

<a href="https://agentmods.dev/agents/gorillabiscuit/ai-assisted-project-starter/pessimistic-reviewer"><img src="https://agentmods.dev/badge/agents/gorillabiscuit/ai-assisted-project-starter/pessimistic-reviewer/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/gorillabiscuit/ai-assisted-project-starter/pessimistic-reviewer"><img src="https://agentmods.dev/badge/agents/gorillabiscuit/ai-assisted-project-starter/pessimistic-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 63 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 755 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 unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00063	$0.00755
Opus 5.5	$0.00025	$0.00302
Sonnet 5.5	$0.00013	$0.00151
Haiku 4.5	$0.00006	$0.00076

Measured 2mo ago against content hash 2bf8faf6c081, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pessimistic-reviewer 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 2mo 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.

.claude/agents/pessimistic-reviewer.md · 70 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

2mo ago First seen · 70 lines · 63 tokens per session scan A 2bf8faf6c081

Subscribe to this mod's changes

pessimistic-reviewer is an agent published in the GitHub repository gorillabiscuit/AI-assisted-project-starter (2 stars, last pushed 3mo ago), with no licence file. It adds 63 tokens to every session and 755 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.

Code review

pessimistic-reviewer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
pessimistic-reviewergorillabiscuit/AI-assisted-project-starter	Agent	2	3mo ago	none	A	63	Claude Code
cpp-revieweraffaan-m/ECC	Agent	299k	yesterday	MIT	A	41	Claude Code, Kiro
thermo-nuclear-code-quality-review-subagentmichael-denyer/pstack-claude	Agent	4.1k	yesterday	MIT	A	68	Claude Code
review-obsidian-guidelinesuphy/obsidian-reminder	Agent	662	2d ago	MIT	A	63	Claude Code
karimo-implementeropensesh/KARIMO	Agent	290	26d ago	Apache-2.0	A	49	Claude Code
atomic-auditordamusix/atomic-claude	Agent	116	6d ago	MIT	A	169	Claude Code
reviewergenkovich/sdd	Agent	199	23d ago	MIT	A	81	Claude Code