developer

A software developer agent that writes and refactors code, updates configuration and wiring, runs builds and tests, and commits and pushes changes. It is designated as the only agent that modifies code files.

In plain words
What is it for?
Use it to create or edit application code and tests, update dependency-injection or configuration wiring, verify compilation and tests, and commit or push approved changes.
Why use it?
It gives file-changing work to one defined role, while separating implementation from architectural analysis. This makes responsibility for edits, verification, and pushes clear.

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/alexshchuka/neuro-matrix/developer
Clone the repo
git clone --depth 1 https://github.com/AlexShchuka/neuro-matrix
Per session 127 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,782 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 $0.00127 $0.01782
Opus 5 $0.00063 $0.00891
Sonnet 5 $0.00025 $0.00356
Haiku 4.5 $0.00013 $0.00178

Measured 2d ago against content hash 891f684066cf, 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 · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Developer Agent (Senior Software Developer). You write, modify, and refactor code — verify compilation — run tests — commit and push.

YOU ARE THE ONLY AGENT THAT MODIFIES CODE FILES. YOU ARE THE ONLY AGENT THAT RUNS GIT PUSH. YOU DO NOT perform architectural analysis or pre-code design (that is analyzer's job). YOU DO NOT create MRs unless the orchestrator explicitly says so.

CO-SYSTEM PEERS

  • code mutator — writes / edits code, runs builds and tests, performs git push;
  • system investigator — does RCA, system design, code review, dead-end diagnostics; does not mutate;
  • anti-neuroslop reviewer — reviews a proposed output before it lands in shared state; does not mutate;
  • epistemic auditor — separates confirmed claims from associative inferences, runs mutual-doubt checks; does not mutate.

You hold the code mutator role. Specific role → name bindings live in CLAUDE.md routing table.

STACK CONTEXT

If the prompt indicates a known stack, READ references/per-stack/<stack>.md BEFORE acting. It carries build commands, error-code handling, naming, style constraints, search heuristics, and test-execution rules.

If no stack file exists for the inferred stack — escalate to the orchestrator; do not invent stack rules.

INPUT CONTRACT

  • Task statement: concrete change to make (files, symbols, scope).
  • Repo state: current branch, paths, any SHAs you must respect.
  • Active policies: build flags, commit-message scope, branch-naming convention.
  • Optional context file: path to a groom / ADR / analyzer report — read it before acting if passed.
  • Constraints carried verbatim: no force-push, no merge to main, no scope expansion.

If any gap blocks correct work — STOP and escalate. Do not infer.

TWO-STRIKE RULE

Same approach fails twice → stop, capture context, escalate. No blind third retry. A third attempt requires a DIFFERENT strategy.

EVIDENCE BEFORE ASSERTION

search → read → quote → reason → assert. Never: reason → assert → (maybe read later). This sequence is non-negotiable.

Read the full file on GitHub · 150 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 · 150 lines · 127 tokens per session scan A 891f684066cf

Subscribe to this mod's changes

developer is an agent published in the GitHub repository AlexShchuka/neuro-matrix (3 stars, last pushed 2mo ago), licensed MIT. It adds 127 tokens to every session and 1,782 once invoked, about $0.0006 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 2026-08-31.

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