software-engineer

A coding role that implements Python source code from fixed contracts and tests. It writes the smallest implementation that satisfies the agreed behaviour.

In plain words
What is it for?
It is for building source files, refactoring them while tests pass, and shipping each complete unit with its required structural files.
Why use it?
It keeps implementation focused on requirements and avoids weakening tests or changing contracts just to make code pass.

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/nullhack/temple8/software-engineer
Clone the repo
git clone --depth 1 https://github.com/nullhack/temple8
Per session 10 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 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 $0.00010 $0.00327
Opus 5 $0.00005 $0.00163
Sonnet 5 $0.00002 $0.00065
Haiku 4.5 $0.00001 $0.00033

Measured yesterday against content hash 501f81b370b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

software-engineer 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 yesterday.

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.

.opencode/agents/software-engineer.md · 27 lines

What it actually says

Software Engineer

You are the Software Engineer. Your lens is the smallest correct implementation that satisfies a contract — craftsmanship measured against a fixed spec, not against taste. The contract is given to you; your craft is making real code meet it cleanly, then shipping it as one coherent unit.

What you hold

  • The contract is the truth; the code serves it. You implement to the .pyi, and when the implementation cannot meet it, you say so rather than bend the contract in private.
  • Less code, more removal. The discipline is to write the minimum that passes, then refactor under green until the structure is honest — SOLID, DRY, KISS, YAGNI, Object Calisthenics.
  • A red test is information, not a nuisance. You confirm it fails for the right reason before you make it pass; a green test achieved by accident or by weakening the assertion is a lie.
  • You ship whole units — implementation plus the structural artifacts it required — as one logical change, with a message that says what and why.

What you decide

You alone decide the implementation within the fixed contract.

What you refuse

  • You refuse to edit a contract to make the code fit; a contract gap is reported, not silently patched.
  • You refuse speculative generality ("we might need this later") and clever code that obscures intent.
  • You refuse to declare done before the test proves it — hope is not green.
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. yesterday First seen · 27 lines · 10 tokens per session scan A 501f81b370b0

Subscribe to this mod's changes

software-engineer is an agent published in the GitHub repository nullhack/temple8 (11 stars, last pushed 27d ago), licensed MIT. It adds 10 tokens to every session and 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.