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/gridaco/grida/etiologynpx skills add gridaco/grida --skill etiologygit clone --depth 1 https://github.com/gridaco/gridaWhat 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 | $0.00101 | $0.01122 |
| Opus 5 | $0.00051 | $0.00561 |
| Sonnet 5 | $0.00020 | $0.00224 |
| Haiku 4.5 | $0.00010 | $0.00112 |
Grade A, and why
etiology 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- etiology — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
etiology
The temptation in a bug fix is to suppress the symptom. The discipline is to know which fix you wrote: the one that addressed the cause, or the one that masked it. Every bug has an etiology — the chain of cause that produced the observable fault — and a fix is only honest once that chain has been traced.
Errors only grow. A bandaid leaks into adjacent call sites, and the next reader inherits both the original defect and the workaround that obscures it. Be fixated on the etiology; the symptom is what alerted you to the bug, not the bug itself. A bandaid is occasionally correct, but it is never the default.
The diagnostic ladder
Before writing the fix, walk the ladder. Each rung is a question the next rung depends on; skipping a rung produces a fix that doesn't know what it is.
- Presentation. What is the user-observable fault? State the symptom precisely — not the suspected cause, the symptom.
- Proximate cause. Which specific code is wrong, and is the defect at the line you would patch, or upstream of it? The line that fires the error is rarely the line that contains it.
- API contract. Was the abstraction we relied on misleading — i.e., would another developer following normal patterns re-trigger the same bug at a different call site? If yes, the defect is in the interface, not the caller.
- Isolated or systemic. Is this a self-contained oversight, or one presentation of a broader pathology in the surrounding code? If broader, scope the fix to the broader cause; patching one of N produces N − 1 future bug reports.
Stating in the PR description which rung you stopped at — and why — keeps the review honest.
Coverage cuts both ways
- Should-have-been covered. The defect slipped a test that ought to exist. The fix carries that test — coverage earned by a regression is the cheapest coverage you will ever buy.
- Impossible to cover. Interactive timing, render-order asymmetries, benchmark-only drift, layered composition where the execution order is the behavior — defects of this kind have no defense once shipped. That raises the bar on the fix, not lowers it. Prefer the underlying refactor; if you must ship a surgical patch, document the constraint at the call site so the next reader sees both the symptom and the rule that keeps it from recurring.
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 · 113 lines · 101 tokens per session scan A 687cbe01fa3f
etiology is a skill published in the GitHub repository gridaco/grida (2,629 stars, last pushed 12d ago), licensed Apache-2.0. It adds 101 tokens to every session and 1,122 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 2026-08-30.
Other skills, from other repositories
react-hook-form
Correct React Hook Form usage anywhere in the monorepo — data flow, subscriptions, reset, dirty state, number inputs, and controlled-input rules. Load this BEFORE writing or modifying ANY form code, adding a field to an existing form, touching watch/useWatch/formState/getValues/setValue/reset, wiring a form into a…
safe-sql-execution
Use whenever code will build, return, fetch, or execute SQL that runs against a user's real Postgres database — even when the request reads like an ordinary feature or bug fix and never says "security," "injection," or "SafeSqlFragment." This covers: writing or editing any pg-meta function, query builder, or endpoint…
studio-e2e-tests
Write and run Playwright E2E tests for Supabase Studio (e2e/studio). Use when asked to run e2e tests, write new E2E tests, or debug flaky or failing Playwright tests. Covers running commands, avoiding race conditions, waiting strategies, selectors, helper functions, and CI vs local differences.
studio-mock-api-tests
Component tests for Supabase Studio that mock API requests at the network layer with MSW. Use when writing or reviewing a component test that exercises a React Query hook or mutation, or when migrating an existing test away from vi.mock('@/data/...'). Covers the customRender + addAPIMock template and the jsdom/MSW…
ask-the-docs
Answer questions about the Supabase docs app (apps/docs) using documented architecture, build pipeline, and review-pattern notes, and apply feature-design principles (codebase reuse, coding minimalism) when proposing or critiquing changes. Use when the user asks "how does X work in the docs app?", "where does Y…
clickhouse-logs-queries
Write, review, and migrate Supabase logs queries against the ClickHouse-backed logs table (the logs.all.otel analytics endpoint). Use this whenever a task involves Logs Explorer SQL, the logattributes map, querying a log source (edgelogs, postgreslogs, authlogs, etc.), translating an old BigQuery cross join…