production-first-decisions

A decision-making process for choosing development tools, libraries, and technical approaches based on industry practice and small tests.

In plain words
What is it for?
Use it to research implementation choices, compare alternatives in a test setup, and record decisions in an architecture decision record.
Why use it?
It reduces the risk of adopting an unsuitable solution based only on assumptions or personal preference.

Skill for Claude CodeCodex

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 skills/oleg494/coding-kit/production-first-decisions
Any agent
npx skills add oleg494/coding-kit --skill production-first-decisions
Clone the repo
git clone --depth 1 https://github.com/oleg494/coding-kit

Made for: Claude Code, Codex.

Per session 115 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 704 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 $0.00115 $0.00704
Opus 5 $0.00057 $0.00352
Sonnet 5 $0.00023 $0.00141
Haiku 4.5 $0.00012 $0.00070

Measured 2d ago against content hash 6aecd50f9118, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

production-first-decisions 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.

skills/production-first-decisions/SKILL.md · 46 lines

How it starts

The opening of the file, as written. The whole thing — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Production-first: decisions by industry practice, not from your head

The source of truth is the industry; knowledge is a hypothesis until verified.

Workflow (order of application)

  1. Formulate the question "how is this done in production?" — explicitly, before any action.
  2. Web search: 5-10 queries from different angles — manuals, official guides, GitHub, practitioner articles, ADRs. Primary sources, not retellings.
  3. Cross-check YOUR hypothesis against what you found. Your own knowledge is only an assumption; web search is source of truth #1. "Thought it through" without searching = a guess, not a decision.
  4. Do it the industry way. Readiness criterion for a decision: "everyone does it this way, not just me alone." Not confirmed by sources → it's a hypothesis: verify by search before writing code.

Test-before-integration (spike → ADR)

A new tool/library/approach — FIRST benchmark, THEN integration:

  1. Question: what are we checking — functionality, fit to the stack?
  2. Benchmark in a sandbox: install it, run a real case, compare with alternatives AND with "doing nothing" (doing nothing is always an option).
  3. Record the conclusion in Wiki/decisions/: what was chosen, what was rejected, the benchmarks.
  4. Integrate only after proof. Without a benchmark, integration is a guess.

Research depth — by task

  • Reference (syntax, command) — 2-3 sources, one pass.
  • Decision/choice — DEEP research: breadth (5-10 queries in parallel), then depth; canonical repos, PRs, issues, ADRs; "everyone does it" — measure (how many production projects actually do), not feel.

Three decision principles (filter before code)

  • DRY — one piece of logic and one piece of knowledge in one place. Duplication = two places that must change together.
  • KISS — the simpler option, if it closes the task. Complexity is justified when the simple one can't cope, not "for the future".
  • YAGNI — don't build what wasn't asked for. "Might come in handy" is an insufficient reason.

Read the full file on GitHub · 46 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 · 46 lines · 115 tokens per session scan A 6aecd50f9118

Subscribe to this mod's changes

production-first-decisions is a skill published in the GitHub repository oleg494/coding-kit (1 stars, last pushed 3d ago), licensed MIT. It adds 115 tokens to every session and 704 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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