What is gallformers CLAUDE.md?

Project-specific instructions for Gallformers, including background jobs, database setup for tests, reusable interface components, and work planning. They also define required checks before code is committed.

Adding or changing Gallformers code, especially background work, database-backed tests, user-interface components, and planned tasks.

They give an agent the project's rules and conventions, reducing duplicate code and avoiding changes that fail the project's checks.

How jeffdc/gallformers configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to jeffdc/gallformers. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/jeffdc/gallformers/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/jeffdc/gallformers

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/jeffdc/gallformers/claude-md/github.svg)](https://agentmods.dev/instructions/jeffdc/gallformers/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/jeffdc/gallformers/claude-md"><img src="https://agentmods.dev/badge/instructions/jeffdc/gallformers/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/jeffdc/gallformers/claude-md"><img src="https://agentmods.dev/badge/instructions/jeffdc/gallformers/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,084 This file is loaded in full into every session.

When invoked 1,084 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.01084	$0.01084
Opus 5.5	$0.00434	$0.00434
Sonnet 5.5	$0.00217	$0.00217
Haiku 4.5	$0.00108	$0.00108

Measured 1mo ago against content hash 754bb66e5da1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gallformers CLAUDE.md 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 1mo 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.

CLAUDE.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CRITICAL:

Investigation Before Action
Search Before You Write
The most common agent failure is writing new code for something that already exists. Do not do this.
Do not commit until precommit passes.
Always compile with --warnings-as-errors**. When verifying code changes, NEVER use plain mix compile - always use mix compile --warnings-as-errors or run mix precommit. CI enforces warnings-as-errors, so skipping this locally will cause CI failures.

Background Jobs

Use Oban for durable, retryable, or scheduled background work. Reserve plain GenServer loops and Process.send_after/3 for in-memory process behavior where persistence, retries, and operator visibility do not matter. The canonical queue dashboard is mounted at /admin/jobs.

Test Database

Tests use a separate PostgreSQL test database (gallformers_test) that is:

Schema-only: Created via Ecto migrations (no production data)
Minimal seed data: Loaded from priv/repo/test_seeds.sql with just enough data for tests
Rebuilt fresh: make test rebuilds the test DB before each run

make test-db               # Rebuild test database manually (rarely needed)

Reusable UI Components

CRITICAL: This project has reusable UI components that MUST be used. Do NOT implement custom/inline versions of these components. Creating new UI patterns requires explicit user approval.

All component files are in lib/gallformers_web/components/.

Before Adding UI Code

Check existing components - Search core_components.ex and form_components.ex
Check existing pages - See how similar UI is implemented elsewhere
If no component exists - ASK before implementing inline. We may want to create a reusable component.

See CODING_STANDARDS.md for details as needed.

Domain Model

docs/domain/domain-model.md records the domain language being discovered for the redesign (galls, organisms, Sources, Observations). It is about the domain, not software, and is not yet implemented. The software design draft lives in matter 8567.
The current code and database follow docs/domain/general.md and docs/domain/admin-domain-reference.md ("everything is a species") until the taxonomy migration (matter 8567).
Don't use the target model to explain current code, or the current docs to design new work.

Read the full file on GitHub · 88 lines

Changes

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.

1mo ago Changed · +7 lines · +157 tokens per session 754bb66e5da1
2mo ago First seen · 81 lines · 927 tokens per session scan A 747b96569dfa

Subscribe to this mod's changes

gallformers CLAUDE.md is an instructions file published in the GitHub repository jeffdc/gallformers (22 stars, last pushed today), licensed Apache-2.0. It adds 1,084 tokens to every session, about $0.0043 per session on Opus 5.5. 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.

gallformers CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
gallformers CLAUDE.mdjeffdc/gallformers	Instructions file	22	today	Apache-2.0	A	1,084	Claude Code
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vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

gallformers: Instructions file for Claude Code