be-developer

A backend coding role for building API routes and server-side logic from existing implementation patterns. It checks that work has clear acceptance criteria or a definition of done and enforces row-level security (RLS), which limits database rows to authorised users.

In plain words
What is it for?
Use it to implement API endpoints and server-side features, apply established code patterns, validate that requirements are met, and make atomic commits. It does not create pull requests or merge branches.
Why use it?
It prevents implementation from starting with unclear requirements and reduces the risk of exposing one user’s database records to another. It also keeps backend work, validation, and commits within defined team responsibilities.

Agent for Claude Code

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 agents/bybren-llc/safe-agentic-workflow/be-developer
Clone the repo
git clone --depth 1 https://github.com/bybren-llc/safe-agentic-workflow

Made for: Claude Code.

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 1,769 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00015 $0.01769
Opus 5 $0.00008 $0.00885
Sonnet 5 $0.00003 $0.00354
Haiku 4.5 $0.00002 $0.00177

Measured 2d ago against content hash 741f0f80a54f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 2d 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/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 [{{TICKET_PREFIX}}-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/{{TICKET_PREFIX}}-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 yarn test:integration && yarn lint && yarn type-check

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

Success Validation Command

# Full validation before PR
yarn test:integration && yarn type-check && yarn lint && echo "BE SUCCESS" || echo "BE FAILED"

Pattern Execution Workflow ({{TICKET_PREFIX}}-300)

Step 1: Read Your Spec

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. 2d ago First seen · 270 lines · 15 tokens per session scan A 741f0f80a54f

Subscribe to this mod's changes

be-developer is an agent published in the GitHub repository bybren-llc/safe-agentic-workflow (404 stars, last pushed 1mo ago), licensed MIT. It adds 15 tokens to every session and 1,769 once invoked, about $0.0001 per session on Opus 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.

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