What is brevix-builder?

A small-edit coding agent limited to surgical changes in one or two files.

Use it for simple renames, targeted replacements, formatter changes, or other small edits that do not require refactoring or architecture changes.

It keeps obvious, narrowly scoped fixes constrained and verifies the edited sections after each change.

brevix-builder — Agent for Claude Code by Yash-Koladiya30

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/Yash-Koladiya30/brevix

Made for: Claude Code.

Or install brevix, the plugin that ships this one along with the rest of its 3 skills, 6 agents.

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/yash-koladiya30/brevix/brevix-builder/github.svg)](https://agentmods.dev/agents/yash-koladiya30/brevix/brevix-builder)

Your own site

<a href="https://agentmods.dev/agents/yash-koladiya30/brevix/brevix-builder"><img src="https://agentmods.dev/badge/agents/yash-koladiya30/brevix/brevix-builder/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/yash-koladiya30/brevix/brevix-builder"><img src="https://agentmods.dev/badge/agents/yash-koladiya30/brevix/brevix-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 34 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 308 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00034	$0.00308
Opus 5	$0.00017	$0.00154
Sonnet 5	$0.00007	$0.00062
Haiku 4.5	$0.00003	$0.00031

Measured 10d ago against content hash de6234b105a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade C, and why

brevix-builder scanned grade C with 1 finding 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 10d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- No `rm -rf`, no `git push`, no force-push, no migration runs.

agents/brevix-builder.md · 44 lines

What it actually says

Brevix Builder

Small-scope edit subagent. Apply edits across at most two files. Verify by re-reading changed regions.

Behavior

Hard limit: ≤2 files edited per invocation.
After every edit, re-read the changed range. Report mismatch if unexpected.
No new abstractions, no refactors beyond the task.
No prose summaries — just the change report.

Output format

path:line-range — change ≤10 words
path:line-range — change ≤10 words
verify: ok

Or, on issue:

verify: mismatch at path:line — saw <X>, expected <Y>

Termination tokens

Return one of these on the last line if the task fails preconditions:

too-big. — needs >2 files
needs-confirm. — destructive or risky action requires user OK
ambiguous. — instructions unclear
regressed. — change breaks existing tests/types

Boundaries

No rm -rf, no git push, no force-push, no migration runs.
Stop after first failed verification. Do not keep editing past a regression.

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.

10d ago First seen · 44 lines · 34 tokens per session scan C de6234b105a3

Subscribe to this mod's changes

brevix-builder is an agent published in the GitHub repository Yash-Koladiya30/brevix (4 stars, last pushed 21d ago), licensed MIT. It adds 34 tokens to every session and 308 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Building agents

Demonstrate

Agent for demonstrating VS Code features.

microsoft/vscode · 10 tokens

playwright-test-generator

Use this agent when you need to create automated browser tests using Playwright Examples: Context: User wants to generate a test for the test plan item.

microsoft/playwright · 151 tokens

AVM Owner Triage

Triage open GitHub issues across the Azure Verified Modules (AVM) repos an owner maintains. Splits the backlog into a Copilot-delegatable pile and a human pile, produces a report with a delegation ratio, and never comments or assigns without explicit user approval.

github/awesome-copilot · 61 tokens

Ultimate Transparent Thinking Beast Mode

Agent "Ultimate Transparent Thinking Beast Mode" from github/awesome-copilot, covering quantum cognitive architecture, phase 2: adversarial intelligence & red-team analysis, phase 3: implementation & iterative refinement and phase 4: comprehensive verification & completion.

github/awesome-copilot · 11 tokens

Context7-Expert

Expert in latest library versions, best practices, and correct syntax using up-to-date documentation.

github/awesome-copilot · 22 tokens

Modernization Agent

Human-in-the-loop modernization assistant for analyzing, documenting, and planning complete project modernization with architectural recommendations.

github/awesome-copilot · 24 tokens

brevix-builder