bx-dev

bx-dev is a skill for Claude Code, Codex from bish-x/bx-dev-skill. It costs 57 tokens per session (26,270 once invoked), scanned B, original, no licence file.

A development-session skill for coordinating coding-agent subagents on implementation and review work. It uses a session branch and does not require an external issue tracker.

In plain words
What is it for?
It helps start or resume a bx-dev session, coordinate implementation and review, and work without an external issue tracker.
Why use it?
It organizes ad-hoc development work and review while keeping changes associated with a dedicated session branch.

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/bish-x/bx-dev-skill/bx-dev
Any agent
npx skills add bish-x/bx-dev-skill --skill bx-dev
Clone the repo
git clone --depth 1 https://github.com/bish-x/bx-dev-skill

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 bx-dev

README.md
[![agentmods](https://agentmods.dev/badge/skills/bish-x/bx-dev-skill/bx-dev.svg)](https://agentmods.dev/skills/bish-x/bx-dev-skill/bx-dev)
Your own site
<a href="https://agentmods.dev/skills/bish-x/bx-dev-skill/bx-dev"><img src="https://agentmods.dev/badge/skills/bish-x/bx-dev-skill/bx-dev.svg" alt="Measured on agentmods" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 26,270 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 3 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00057 $0.26270
Opus 5 $0.00028 $0.13135
Sonnet 5 $0.00011 $0.05254
Haiku 4.5 $0.00006 $0.02627

Measured 3d ago against content hash c2c0cacb208d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

bx-dev scanned grade B with 3 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 3d ago.

The scan reads SKILL.md. This mod also ships 6 executable files (skill-library/backend/mcp-builder/scripts/connections.py, skill-library/backend/mcp-builder/scripts/evaluation.py, skill-library/documents/markitdown/scripts/batch_convert.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Subtle steeringmediumPrompt injection

Instructions that bias recommendations or shape behaviour without the user noticing.

Never tell the user "still waiting on Dev" after a final `subagent_notification` has already arrived.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- API / CLI / no interface -> test via shell commands (curl, running commands)

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

echo "$changed_files" | grep -iE '(auth|login|session|cookie|token|password|secret|credential|jwt|oauth|csrf|sanitiz|encrypt|decrypt|sql.?injection|migration|\.env|deserializ|exec|eval|child_process|webhook)'
skills/bx-dev/SKILL.md · 2,039 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 3d ago First seen · 2,039 lines · 57 tokens per session scan B c2c0cacb208d

Subscribe to this mod's changes

bx-dev is a skill published in the GitHub repository bish-x/bx-dev-skill (23 stars, last pushed 3mo ago), with no licence file. It adds 57 tokens to every session and 26,270 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 3 findings (subtle steering, makes network calls, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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