What is bear-analyst?

A review agent for shares listed on B3, Brazil’s stock exchange. It reads other analysts’ findings, challenges their weakest assumptions, and creates a downside case with another price target.

Use it after other stock-analysis agents have finished. It helps stress-test an investment thesis and prepare a bear scenario for an investment committee.

It helps reveal risks that a group focused mainly on the positive case may miss. It also shows how fragile the investment argument is.

How guhcostan/b3analysis configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to guhcostan/b3analysis. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/guhcostan/b3analysis/main/.claude/agents/bear-analyst.md

Clone the repo

git clone --depth 1 https://github.com/guhcostan/b3analysis

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/guhcostan/b3analysis/bear-analyst/github.svg)](https://agentmods.dev/agents/guhcostan/b3analysis/bear-analyst)

Your own site

<a href="https://agentmods.dev/agents/guhcostan/b3analysis/bear-analyst"><img src="https://agentmods.dev/badge/agents/guhcostan/b3analysis/bear-analyst/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/guhcostan/b3analysis/bear-analyst"><img src="https://agentmods.dev/badge/agents/guhcostan/b3analysis/bear-analyst.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 81 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,418 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	$0.00081	$0.01418
Opus 5.5	$0.00032	$0.00567
Sonnet 5.5	$0.00016	$0.00284
Haiku 4.5	$0.00008	$0.00142

Measured 2mo ago against content hash 56c04eacc692, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bear-analyst 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/bear-analyst.md · 121 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 · 121 lines · 81 tokens per session scan A 56c04eacc692

Subscribe to this mod's changes

bear-analyst is an agent published in the GitHub repository guhcostan/b3analysis (131 stars, last pushed 11d ago), with no licence file. It adds 81 tokens to every session and 1,418 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 2026-08-30.

Analytics and metrics Finance and fintech

bear-analyst next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
bear-analystguhcostan/b3analysis	Agent	131	11d ago	none	A	81	Claude Code
ic-challengermariourquia/cre-skills-plugin	Agent	51	9d ago	none	A	85	Claude Code
token-economics-designerMatt-Dionis/claude-code-configs	Agent	619	1y ago	MIT	A	28	Claude Code
soleur-finance-budget-analystjikig-ai/soleur	Agent	21	today	none	A	78	Claude Code
pm-business-analystgeekatron/jerry	Agent	37	5d ago	none	B	107	Claude Code
financial-integrity-auditorblendsdk/claude-codeops	Agent	4	3mo ago	MIT	A	142	Claude Code
royalty-audit-analystrecoupable/skills	Agent	9	today	none	A	46	Claude Code

b3analysis: Agent for Claude Code