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.
npx skills add tjboudreaux/cc-plugin-engineering-excellence --skill eng-holistic-systemsgit clone --depth 1 https://github.com/tjboudreaux/cc-plugin-engineering-excellenceWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/tjboudreaux/cc-plugin-engineering-excellence/eng-holistic-systems)<a href="https://agentmods.dev/skills/tjboudreaux/cc-plugin-engineering-excellence/eng-holistic-systems"><img src="https://agentmods.dev/badge/skills/tjboudreaux/cc-plugin-engineering-excellence/eng-holistic-systems/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/tjboudreaux/cc-plugin-engineering-excellence/eng-holistic-systems"><img src="https://agentmods.dev/badge/skills/tjboudreaux/cc-plugin-engineering-excellence/eng-holistic-systems.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00034 | $0.00385 |
| Opus 5 | $0.00017 | $0.00192 |
| Sonnet 5 | $0.00007 | $0.00077 |
| Haiku 4.5 | $0.00003 | $0.00038 |
Grade A, and why
eng-holistic-systems 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 10d 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.
What it actually says
Holistic Systems Thinking
Intent
- Understand the true user goal, success metrics, and non-negotiable constraints.
- Trace data/control flow across clients, services, contracts, and on-chain/off-chain boundaries.
- Surface hidden couplings, scalability ceilings, and rollback requirements early.
Inputs to Gather
- Problem statement in your own words plus measurable success criteria.
- Existing architecture sketches (runtime, deployment, data lifecycle) and ownership boundaries.
- Operational constraints: latency/throughput budgets, privacy rules, platform limitations, on-chain gas caps, store policies, etc.
- Known risks: single points of failure, stale assumptions, migrations in flight.
Workflow
- Map the ecosystem
- List upstream/downstream systems, contracts, and user touchpoints affected.
- Identify invariants that must hold and where they can break.
- Reason about change scope
- Partition work into independently testable slices with explicit integration seams.
- Decide where to place new logic (client/server/worker/contract) based on latency, trust, and deployability.
- Plan resiliency
- Define failure detection signals, graceful degradation, and rollback/feature-flag hooks.
- Highlight areas needing schema/version negotiation.
- Record decisions for execution
- Capture the chosen approach, tradeoffs, and open questions inside the ticket/PR description before implementation.
Verification
- Confirm each requirement maps to at least one planned change and validation step.
- Share the plan with a peer or stakeholder; ensure assumptions and risks are acknowledged.
- Revisit this skill after implementation planning to see if new dependencies appeared; update the plan accordingly.
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.
- 10d ago First seen · 36 lines · 34 tokens per session scan A 5c9ae3f753fc
eng-holistic-systems is a skill published in the GitHub repository tjboudreaux/cc-plugin-engineering-excellence (4 stars, last pushed 7mo ago), licensed MIT. It adds 34 tokens to every session and 385 once invoked, about $0.0002 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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