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/databasenpx skills add gridaco/grida --skill databasegit 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 | $0.00106 | $0.02888 |
| Opus 5 | $0.00053 | $0.01444 |
| Sonnet 5 | $0.00021 | $0.00578 |
| Haiku 4.5 | $0.00011 | $0.00289 |
Grade A, and why
database 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 — 272 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Database — operating contracts
Three contracts this skill protects:
- Applied migrations are immutable.
- The RLS spec is the source of truth — implementations follow tests, not the reverse.
schemas/*.sqlis the human-friendly description of the final shape.
supabase/AGENTS.md is the harder rule layer (RLS, grants, security
boundaries). This skill covers the recurring workflow tasks. Read both.
For realistic optional Library data without changing schema history or the canonical base seed, use the opt-library skill. Return here when that work changes migrations, schemas, RLS, or grants.
Common mistake (read this first)
When asked to "merge migrations" or "consolidate", the temptation is to
collapse every supabase/migrations/* into a single canonical file.
This is wrong if any of those files have already been applied to a
deployed environment. Rewriting an applied migration:
- Diverges file content from what
supabase_migrations.schema_migrationsrecords as already-run. - Makes future
db resetproduce a different starting state for new contributors than what the existing environment holds. - Can silently drop columns, policies, or grants the live system needs.
Before merging anything, classify each migration:
| Class | Signal | Allowed action |
|---|---|---|
| Applied (production) | User confirms it's in production, OR file has been on main long enough to have shipped. |
Read-only. Never edit, never delete. |
| Applied (committed peers) | Tracked on the current branch but originated upstream (already on main / canary). |
Read-only. Never edit, never delete. |
| Local-only (this PR) | Newly added on the current working tree / branch, not yet merged to a deployed branch. | Free to merge, rename, delete, rewrite. |
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 · 272 lines · 106 tokens per session scan A c9ad2147f38d
database is a skill published in the GitHub repository gridaco/grida (2,624 stars, last pushed 11d ago), licensed Apache-2.0. It adds 106 tokens to every session and 2,888 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.
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