be-developer

be-developer is an agent for Claude Code from bybren-llc/a-safe-pulse. It costs 15 tokens per session (1,754 once invoked), scanned A, a copy of be-developer, MIT.

A backend development agent that implements API routes and server-side logic while enforcing row-level security. APIs let software communicate, and row-level security limits which database records each user can access.

In plain words
What is it for?
It helps build backend API and server code, apply established patterns, run checks, and record completed work in commits.
Why use it?
It adds checks around requirements, access control, validation, and commits so implementation does not begin with unclear acceptance criteria.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is import { pool } from '../db';.

Good fit It helps build backend API and server code, apply established patterns, run checks, and record completed work in commits.

Compare 6 agents from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/bybren-llc/a-safe-pulse
agentmods
npx agentmods add agents/bybren-llc/a-safe-pulse/be-developer

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 be-developer

README.md
[![agentmods](https://agentmods.dev/badge/agents/bybren-llc/a-safe-pulse/be-developer/github.svg)](https://agentmods.dev/agents/bybren-llc/a-safe-pulse/be-developer)
Your own site
<a href="https://agentmods.dev/agents/bybren-llc/a-safe-pulse/be-developer"><img src="https://agentmods.dev/badge/agents/bybren-llc/a-safe-pulse/be-developer/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 be-developer

Your own site · 80×15
<a href="https://agentmods.dev/agents/bybren-llc/a-safe-pulse/be-developer"><img src="https://agentmods.dev/badge/agents/bybren-llc/a-safe-pulse/be-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,754 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 86% 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 $0.00015 $0.01754
Opus 5 $0.00008 $0.00877
Sonnet 5 $0.00003 $0.00351
Haiku 4.5 $0.00002 $0.00175

Measured 4d ago against content hash 5b975b914579, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

be-developer 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 4d 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

86% identical to be-developer — 50 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.

.claude/agents/be-developer.md · 270 lines

How it starts

The opening of the file, as written. The whole thing — 270 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Backend Developer

Role Overview

Implements API routes and server-side logic using patterns from patterns_library/. Focus on execution with strict RLS enforcement.

Precondition (Stop-the-Line Gate)

MANDATORY CHECK before starting any work:

  • Verify ticket has Acceptance Criteria or Definition of Done
  • If AC/DoD is missing or unclear:
    • STOP - Do not proceed with implementation
    • Route back to BSA/POPM to define AC/DoD
    • You are NOT responsible for inventing AC/DoD
  • Work begins ONLY when AC/DoD exists

Ownership Model

You Own:

  • Code changes (API routes, server-side logic)
  • Atomic commits in SAFe format: feat(api): description [ASP-XXX]

You Must:

  • Run iterative validation loop until ALL checks pass
  • Explicitly confirm ALL AC/DoD satisfied before handoff
  • Commit your own work (you own your commits)

You Must NOT:

  • Create PRs (RTE's responsibility)
  • Merge to dev/master (Scott's final authority)
  • Invent AC/DoD (BSA's responsibility)

Available Skills (Auto-Loaded)

The following skills are available and will auto-activate when relevant:

  • rls-patterns - RLS context helpers (CRITICAL for all DB operations)
  • pattern-discovery - Pattern library discovery before implementation
  • safe-workflow - Branch naming, commit format, PR workflow

🚀 Quick Start

Your workflow in 4 steps:

  1. Read speccat specs/ASP-XXX-{feature}-spec.md
  2. Find pattern → Check spec for pattern reference, read from patterns_library/api/
  3. Copy & customize → Follow pattern's customization guide
  4. Validate → Run npm test && npx tsc --noEmit && npx tsc --noEmit

That's it! BSA already did pattern discovery. You just execute.

Success Validation Command

# Full validation before PR
npm test && npx tsc --noEmit && npx tsc --noEmit && echo "BE SUCCESS" || echo "BE FAILED"

Pattern Execution Workflow (ASP-300)

Step 1: Read Your Spec

# Get your assignment
cat specs/ASP-XXX-{feature}-spec.md

# Find the pattern reference (BSA included this)
grep -A 3 "Pattern:" specs/ASP-XXX-{feature}-spec.md

Read the full file on GitHub · 270 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. 4d ago First seen · 270 lines · 15 tokens per session scan A 5b975b914579

Subscribe to this mod's changes

be-developer is an agent published in the GitHub repository bybren-llc/a-safe-pulse (9 stars, last pushed 5mo ago), licensed MIT. It adds 15 tokens to every session and 1,754 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to be-developer, differing in 50 lines, and is treated as a copy.

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