# CLAUDE.md

Guidance for Claude Code (and other coding agents) working in this repository. This file is
intentionally short and durable — it points at authoritative sources instead of restating their
contents, because restated details drift.

## What this repository is

Ekklesia is a modular, self-hosted church platform built as a strictly layered pnpm/TypeScript
monorepo:

- **Core** (`core/`) owns platform infrastructure: identity, database connectivity, migration
  execution, module discovery/lifecycle, and other feature-agnostic services. Core never imports a
  feature module, a surface, or an app.
- **Modules** (`modules/*`, template at `templates/module`) are independently versioned product
  packages. They own their own data and migrations, declare capabilities/permissions through
  `@ekklesia/contracts` and `@ekklesia/module-sdk`, and must never import Core, another module, or a
  surface directly. Per ADR 0021 a module owns its UI; manifest v7 permits independently optional
  primary and full-viewport display artifacts, authored in React against the same role-neutral
  `@ekklesia/module-ui-sdk` ABI. Ekklesia mounts each through a separate surface role, while
  `pnpm boundaries` still rejects every non-React UI framework and non-`.tsx` presentation source.
- **Surfaces** (`surfaces/*`) own the containing application shell, navigation, and every
  presentation concern a module does not. They consume public API/client contracts only, never Core
  or module internals directly.

These boundaries are enforced by `pnpm boundaries` (`scripts/check-boundaries.ts`), not just
documented. Read `docs/architecture/repository-boundaries.md` and
`docs/architecture/platform-architecture.md` before proposing any change that crosses a layer.

## ADRs are authoritative

`docs/architecture/decisions/` records durable architectural decisions. **Accepted ADRs are
immutable except for status and cross-reference corrections** — do not edit their content to fit a
new change. A changed decision gets a new ADR that supersedes the old one. Read the full ADR index
(`docs/architecture/decisions/README.md`) and every ADR relevant to the area you are touching
before designing a change; do not assume this file's summary of any decision is complete or
current.

## Read before you design

At minimum, read the current versions of:

- `docs/architecture/decisions/README.md` and every ADR relevant to your change
- `docs/architecture/platform-architecture.md` and `docs/architecture/repository-boundaries.md`
- `README.md` (current platform status — what is and is not implemented)
- `docs/development/repository-workflow.md` and `docs/development/testing.md`
- `CONTRIBUTING.md`

These files change as the platform evolves. **Inspect the actual current repository state
(source, tests, package.json scripts, CI workflow) before relying on anything in this file or in
your own memory of a prior session** — treat stale assumptions as a bug to catch, not a shortcut.

## Working conventions

- Work on a clean branch off an up-to-date `main`; never commit or push directly to `main`; never
  change branch-protection settings.
- Keep PRs focused on one bounded slice. Record major architectural changes in an ADR rather than
  burying them in an implementation.
- Add or update tests when you change a contract or architectural rule. New behavior needs new
  test coverage, not just a passing existing suite.
- Errors that reach a user, log, CLI, or `pnpm doctor` output must be sanitized: never expose
  secrets, connection strings, raw SQL, raw driver/exception messages, stack traces, causes, or
  machine-specific paths. Match the sanitization pattern already used by
  `core/src/migrations/runner.ts` and `core/src/diagnostics/doctor.ts` rather than inventing a new
  one.
- Never run a database migration automatically (on import, on startup, in a test that isn't
  explicitly a migration test, or as a side effect of an unrelated command). Migrations are always
  an explicit, operator-invoked action.

## Canonical verification commands

Run from the repository root; `package.json` is the source of truth if this list and the file
ever disagree:

- `pnpm verify` — the full code-only gate (format, lint, boundaries, typecheck, tests, module and
  migration validation, identity schema drift check, build). Docker-free; never touches a live
  database.
- `pnpm test:migrations:integration` — live, disposable-PostgreSQL evidence: migration discovery,
  planning, and execution, plus the `apps/api` HTTP transport (signup, sign-in, principal
  resolution, sign-out). Requires Docker. Run this for any change touching either area.
- `pnpm doctor` — read-only local readiness report. Never treat it as a substitute for `pnpm
  verify` or the integration suite.
- `pnpm migrations:plan` / `pnpm migrations:apply` — read-only planning vs. mutating execution
  against `DATABASE_URL`. Never run `migrations:apply` without the user's explicit intent.
- `pnpm api:start` — starts the identity HTTP transport against an already-migrated `DATABASE_URL`.
  It never applies migrations itself. Never run it without the user's explicit intent.

## When you're unsure

If a task would require weakening an existing ADR's guarantee, introducing a second mechanism
where one already exists (a second migration runner, a second discovery path, a second config
system), or exposing something the boundary checker currently blocks, stop and surface the
conflict instead of working around it.