stack

Guidance for choosing the technology platform and making a project fit that platform's current practices. The platform may be a programming stack or a hosted service such as Salesforce or ServiceNow.

In plain words
What is it for?
Use it when selecting or changing a language, framework, hosting service, or low-code platform, and when comparing options for fit, cost, hiring, handover, or compliance.
Why use it?
It makes the technology choice explicit instead of assuming one by habit. It also requires checking current platform facts and recording the trade-offs behind the recommendation.

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/tradebaas/groundwork/stack
Any agent
npx skills add Tradebaas/Groundwork --skill stack
Clone the repo
git clone --depth 1 https://github.com/Tradebaas/Groundwork

Made for: Claude Code, Codex.

Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,950 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 $0.00098 $0.01950
Opus 5 $0.00049 $0.00975
Sonnet 5 $0.00020 $0.00390
Haiku 4.5 $0.00010 $0.00195

Measured yesterday against content hash b7a061b4cf12, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

stack 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.

.agents/skills/stack/SKILL.md · 129 lines

How it starts

The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.

stack: choose deliberately, then be born current

"Stack" here means whatever the product is built on: a language and framework on self-chosen infrastructure, or a hosted platform where the product is largely configured (Power Platform, ServiceNow, Salesforce, Google's builders, or any successor). This skill carries a method, not a platform table; every platform fact is looked up live from the vendor's current official documentation, so platforms and practices that appear after this skill was written are in scope automatically.

1. Decide the stack: options on merit

Derive candidates from BRIEF.md (target, users, constraints, integrations, team). Hosted platforms are candidates on equal footing when the brief points there (existing tenant, licensing, citizen-developer handover). Present 2-3 genuinely different options with honest trade-offs (fit, ecosystem maturity, hiring/handover, cost, compliance implications, e.g. EU data residency of managed services). Recommend one; the owner confirms. Record as a decision record with the options and the reason.

Verify before recommending. Versions, support status, pricing, EU-residency: check current authoritative sources (official docs, release pages). Model memory is a rumor with a cutoff.

2. Generate docs/standards/<stack>.md

Start from docs/standards/TEMPLATE-STACK.md, which owns the shape. Its floor table is the part checks/check.mjs reads: six classes of risk, each answered with a command, a reasoned not applicable, or a named manual check with a defer: marker. Fill that table as you research, because it is what step 3 has to satisfy.

Research what a top engineer in this ecosystem does today, from primary sources, and write it down with versions, dates, and source links.

Head the file with what its readers depend on: the stack's name and version, whether it is a hosted platform (and which one), and the date these facts were last verified against primary sources. That header carries weight elsewhere - the platform line is what switches on the platform route in code-review, debug, maintain and deliver, and the date is what maintain's quarterly audit tests for staleness. A file with no platform line reads downstream as "not a platform", so a platform project that omits it loses all four routes silently. Then cover at least:

Read the full file on GitHub · 129 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. yesterday First seen · 129 lines · 98 tokens per session scan A b7a061b4cf12

Subscribe to this mod's changes

stack is a skill published in the GitHub repository Tradebaas/Groundwork (2 stars, last pushed 6d ago), licensed MIT. It adds 98 tokens to every session and 1,950 once invoked, about $0.0005 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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