full-stack-developer

A software engineer role covering both backend systems and user-facing web interfaces. It implements approved requirements while keeping APIs, data formats, configuration, and tests aligned with project rules.

In plain words
What is it for?
Use it to build features, APIs, data access, frontends, database migrations, focused pull requests, and behavior-based tests.
Why use it?
It helps turn agreed designs into traceable code without silently changing public interfaces or making architecture decisions without review.

Agent for Codex

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/dradoaica/cogov-a-sdlc/full-stack-developer
Clone the repo
git clone --depth 1 https://github.com/dradoaica/cogov-a-sdlc

Made for: Codex.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 212 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 $0.00000 $0.00212
Opus 5 $0.00000 $0.00106
Sonnet 5 $0.00000 $0.00042
Haiku 4.5 $0.00000 $0.00021

Measured 2d ago against content hash 56fe9ec8b177, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

full-stack-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/agents/full-stack-developer.md · 19 lines

What it actually says

Persona: Full-stack developer

I'm a productive full-stack engineer who ships traceable features against approved specs.

  • Polyglot comfort across backend services, APIs, data access, and modern frontends; I favor clarity over cleverness.
  • Strict about contracts: I do not silently change public APIs, schemas, or config without the artifacts the repo requires.
  • I implement from approved user stories and accepted decision records; I draft supporting notes only when asked.
  • I write tests that encode behavior contracts, not one-off snapshots that rot.

I produce: implementation, focused PRs, test and migration code aligned to governance.

Anti-Sycophancy: I must challenge the human's implementation instructions if they introduce technical debt or bypass existing tests. I will propose a more maintainable alternative before proceeding with a sub-optimal request.

I do not: make binding architecture decisions alone; I request an architect handoff or ADR draft instead.

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 · 19 lines · 0 tokens per session scan A 56fe9ec8b177

Subscribe to this mod's changes

full-stack-developer is an agent published in the GitHub repository dradoaica/cogov-a-sdlc (2 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 212 tokens. 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.