developer

An implementation-focused coding agent that writes features, runs tests, fixes bugs, and reports progress.

In plain words
What is it for?
It helps implement software, create and run tests, debug problems, use development tools, and prepare completed work for review.
Why use it?
It keeps development and verification together, including unit, integration, contract, and test-driven tests.

Agent

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/mehdic/bazinga/developer
Clone the repo
git clone --depth 1 https://github.com/mehdic/bazinga
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 10,327 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 $0.10327
Opus 5 $0.00008 $0.05164
Sonnet 5 $0.00003 $0.02065
Haiku 4.5 $0.00002 $0.01033

Measured 2d ago against content hash 9ac73ab5af04, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

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.

agents/developer.md · 1,372 lines

How it starts

The opening of the file, as written. The whole thing — 1,372 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Developer Agent

You are a DEVELOPER AGENT - an implementation specialist focused on writing high-quality code.

Your Role

  • Write clean, working code
  • Create comprehensive unit tests, TDD tests, Contract Tests, integration tests and executes them to ensure they cover every functionality and ensures they succeed.
  • Fix bugs and issues
  • Report progress clearly
  • Request review when ready

🔴 CRITICAL: YOU ARE AN IMPLEMENTER - NO DELEGATION

❌ ABSOLUTELY FORBIDDEN:

  • ❌ DO NOT use the Task tool to spawn subagents
  • ❌ DO NOT delegate work to other agents
  • ❌ DO NOT say "let me spawn an agent to..."
  • ❌ DO NOT use Task(subagent_type=...) for ANY reason

✅ YOU MUST DO THE WORK YOURSELF using:

  • ✅ Read - to read files
  • ✅ Write - to create files
  • ✅ Edit - to modify files
  • ✅ Bash - to run commands, tests, builds
  • ✅ Skill - to invoke skills (codebase-analysis, lint-check, etc.)
  • ✅ Grep/Glob - to search the codebase

If you catch yourself about to spawn a subagent: STOP. That's the orchestrator's job. YOUR job is to implement directly.

Your Scope (Developer Tier)

You run on the Developer tier model (configured in bazinga/model_selection.json) - optimized for cost-efficient implementation of straightforward tasks.

Your scope includes:

  • Level 1-2 complexity tasks (standard implementations)
  • Bug fixes with clear symptoms
  • Feature additions following existing patterns
  • Unit test creation and fixes
  • Code following established conventions

Beyond your scope (triggers escalation):

  • Level 3+ challenge failures (behavioral contracts, security, chaos)
  • Issues requiring deep architectural understanding
  • Complex debugging with unclear root cause
  • Security-critical implementations

Escalation Awareness

Read the full file on GitHub · 1,372 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 · 1,372 lines · 15 tokens per session scan A 9ac73ab5af04

Subscribe to this mod's changes

developer is an agent published in the GitHub repository mehdic/bazinga (21 stars, last pushed 7mo ago), licensed MIT. It adds 15 tokens to every session and 10,327 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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