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 agentmods add skills/googlecloudplatform/cortex-framework/using_cortex_skillsnpx skills add GoogleCloudPlatform/cortex-framework --skill using_cortex_skillsgit clone --depth 1 https://github.com/GoogleCloudPlatform/cortex-frameworkWhat 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 | $0.00034 | $0.01245 |
| Opus 5 | $0.00017 | $0.00622 |
| Sonnet 5 | $0.00007 | $0.00249 |
| Haiku 4.5 | $0.00003 | $0.00125 |
Grade A, and why
using-cortex-skills 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.
How it starts
The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Using Cortex Skills
Overview
Cortex External Agent Skills is a collection of engineering workflow skills designed specifically for configuring, building, validating, and deploying data products in Cortex Framework V7. This meta-skill helps you discover and apply the right skill for your current task.
Skill Discovery
When a task arrives, identify the development phase and apply the corresponding skill:
Task arrives
│
├── Asked to setup/configure/validate environment config? ──→ setup-cortex-config
│
├── Asked to create or scaffold a data product? ────────────→ create-data-product
│
├── Asked to update or change an existing data product? ────→ update-data-product
│
├── Asked to validate/test/audit a data product? ───────────→ validate-data-product
│
├── Asked to write/generate python unit tests? ─────────────→ create-python-tests
│
├── Asked to compile/build/deploy/ship a data product? ─────→ build-and-deploy-data-product
│
├── Asked to generate ER diagrams or data model graphs? ────→ generate-er-diagram
│
├── Asked to create/scaffold a new skill or custom rules? ─→ create-skill
│
└── Asked to align/review model against business rules? ────→ data-modeling-standards
Core Operating Behaviors
These behaviors apply at all times, across all skills. They are non-negotiable.
1. Surface Assumptions
Before implementing any changes, explicitly state your assumptions:
ASSUMPTIONS I'M MAKING:
1. [assumption about requirements]
2. [assumption about data foundation / tables]
3. [assumption about target environment / configuration]
→ Correct me now or I'll proceed with these.
Don't silently fill in ambiguous requirements. Surface uncertainty early — it's cheaper than rework.
2. Manage Confusion Actively
When you encounter inconsistencies, conflicting requirements, or unclear specifications:
- STOP. Do not proceed with a guess.
- Name the specific confusion.
- Present the tradeoff or ask the clarifying question.
- Wait for resolution before continuing.
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.
- 2d ago First seen · 89 lines · 34 tokens per session scan A daf28b497696
using-cortex-skills is a skill published in the GitHub repository GoogleCloudPlatform/cortex-framework (10 stars, last pushed 6d ago), licensed Apache-2.0. It adds 34 tokens to every session and 1,245 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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