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/huytieu/cog-second-brain/data-formsnpx skills add huytieu/COG-second-brain --skill data-formsgit clone --depth 1 https://github.com/huytieu/COG-second-brainWrote this? Show the measurements
A badge for your README with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them.
[](https://agentmods.dev/skills/huytieu/cog-second-brain/data-forms)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 | $0.00130 | $0.00216 |
| Opus 5 | $0.00065 | $0.00108 |
| Sonnet 5 | $0.00026 | $0.00043 |
| Haiku 4.5 | $0.00013 | $0.00022 |
Grade A, and why
data-forms 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 3d 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
Read .claude/skills/data-forms/SKILL.md and execute it exactly as written — that file is the authoritative
playbook. Then follow .agents/rules/cog.md.
Antigravity substitution: where the playbook delegates to a .claude/agents/<name>
worker, invoke .agents/agents/<name>.md via invoke_subagent instead.
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.
- 3d ago First seen · 11 lines · 130 tokens per session scan A bfb7d1379ae6
data-forms is a skill published in the GitHub repository huytieu/COG-second-brain (1,153 stars, last pushed 8d ago), licensed MIT. It adds 130 tokens to every session and 216 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 2026-08-30.
Other skills, from other repositories
api-testing
API testing patterns for Playwright -- apiRequest fixture usage, Zod response schema creation and validation, test.step wrapping for multi-call tests, per-field negative/validation testing, path parameter fuzzing, and helper fixtures for shared setup/teardown. Use when writing or updating API test specs, adding tests…
debugging
Playwright test debugging conventions for the scaffold — reading failure messages, classifying failure modes (TimeoutError, ZodError, strict-mode violation, locator not found, network errors, schema drift), the playwright.config.ts capture defaults (trace on-first-retry, screenshot only-on-failure, video…
pr-reviewer
Reviews a Git branch as a pull request against the base branch (auto-resolved from origin/HEAD — usually main or master) using this repo's own rules — the CLAUDE.md constitution and the .claude/skills/ that apply to the changed files. Fetches the branch, switches to it, diffs it against the merge-base, routes the…
ai-native-workflow
Sole entry-point router for AI-assisted work on this Playwright scaffold — owns the 8-phase main workflow (classify → route → explore → plan+confidence → human gate → apply → verify → report), the human↔agent conversation contract, the routing matrix that picks the right specialized skill, and the confidence-gate…
data-strategy
Test data strategy for the Playwright scaffold — Faker + Zod factories for dynamic happy-path data, static TS files (.ts with as const exports — never .json) for domain-specific curated invalid sets, and the universal type-mismatch arrays in test-data/static/util/invalid-values.ts. Use when creating or editing a data…
helpers
Plain utility function conventions for the Playwright scaffold — app-specific helpers in helpers/{area}/ (authentication bootstrap, storage-state creation, data seeding) and generic utilities in helpers/util/ (date formatting, string manipulation, parsing). Use when adding a reusable function that does NOT need the…