refactor: faster go codegen

[wim07101993]

Summary

I noticed that the go generate ./... command was getting slow on my computer so I started researching what was up:

Impact

Command	Before	After
go generate ./...	13.9s	5.1s	2.7x
moon run server:generate / server:check-generate	13.9s	3.3s	4.2x

Where the time went

Package	Before	After
internal/domain	5398ms	2134ms
internal/service	5181ms	886ms
internal/crypto	1219ms	612ms
api	432ms	469ms
everything else	~1000ms	~1300ms
serial total	~13.9s	~5.1s
wall clock, packages in parallel	—	~3.3s

The two numbers differ because mockgen's cost is per invocation, not per interface:
it type-loads the package before mocking anything, so a directive covering one
interface costs the same ~800ms as one covering twenty. internal/service had six
such directives and paid the load six times.

After the change the run is no longer a sum — it's a critical path of
api (469ms) + internal/domain (2134ms), with every other package finishing
underneath it.

Validation

• go generate ./...

Release notes / changeset

• No changeset required — no shipped behavior changed.

Notes

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Project	Deployment	Actions	Updated (UTC)
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[github-actions]

🦋 Changeset detected

Latest commit: ef09c17

The changes in this PR will be included in the next version bump.

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[Copilot]

Pull request overview

This PR speeds up Go code generation in the monorepo by (1) consolidating many per-interface mockgen directives into a single package-level invocation for internal/{service,domain,crypto}, and (2) running go generate across directive-holding directories concurrently (while keeping api generation serialized first to avoid source-read/write races). It also updates the server Moon tasks and repository guidance to use the new generator.

Changes:

• Add scripts/go-generate.mjs to discover //go:generate directives and run package generation in parallel with an api-first phase boundary.
• Consolidate mock generation in internal/{service,domain,crypto} into single generate.go directives, collapsing multiple generated mock files into one per package.
• Update Moon tasks + AGENTS.md guidance, and add an empty changeset describing the non-shipping performance improvement.

Reviewed changes

Copilot reviewed 36 out of 37 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
scripts/go-generate.mjs	New Node script to discover //go:generate directives and run generation concurrently with an api-first phase.
scripts/check-go-generate.mjs	Switches “check generate drift” to call the new generator runner and handle errors without stack noise.
internal/service/token.go	Removes per-interface mockgen directive (now consolidated).
internal/service/statement.go	Removes large per-file mockgen directive (now consolidated).
internal/service/session.go	Removes per-interface mockgen directive (now consolidated).
internal/service/mocks/token.mock.go	Deletes standalone generated mock file (consolidated into service.mock.go).
internal/service/mocks/session.mock.go	Deletes standalone generated mock file (consolidated into service.mock.go).
internal/service/mocks/service.mock.go	Regenerated: now contains combined mocks for service/database/auth/session/token/key-related interfaces.
internal/service/mocks/keys.mock.go	Deletes standalone generated mock file (consolidated into service.mock.go).
internal/service/mocks/database.mock.go	Deletes standalone generated mock file (consolidated into service.mock.go).
internal/service/mocks/auth_attempt.mock.go	Deletes standalone generated mock file (consolidated into service.mock.go).
internal/service/keys.go	Removes per-interface mockgen directive (now consolidated).
internal/service/generate.go	New package-level mockgen directive for the entire internal/service package.
internal/service/database.go	Removes per-interface mockgen directive (now consolidated).
internal/service/auth_attempt.go	Removes per-interface mockgen directive for secondary ports (now consolidated).
internal/domain/mock/json_schema.mock.go	Deletes standalone generated mock file (consolidated into domain.mock.go).
internal/domain/mock/flow_passkey_registration.mock.go	Deletes standalone generated mock file (consolidated into domain.mock.go).
internal/domain/mock/flow_on_success.mock.go	Deletes standalone generated mock file (consolidated into domain.mock.go).
internal/domain/mock/flow_field_resolver.schema.mock.go	Deletes standalone generated mock file (consolidated into domain.mock.go).
internal/domain/mock/flow_field_resolver.mock.go	Deletes standalone generated mock file (consolidated into domain.mock.go).
internal/domain/mock/flow_auth_attempt.mock.go	Deletes standalone generated mock file (consolidated into domain.mock.go).
internal/domain/mock/domain.mock.go	New combined generated mocks for multiple domain interfaces.
internal/domain/json_schema.go	Removes per-interface mockgen directive (now consolidated).
internal/domain/generate.go	New package-level mockgen directive for the entire internal/domain package (keeps enumer directives near types).
internal/domain/flow_passkey_registration.go	Removes per-interface mockgen directive (now consolidated).
internal/domain/flow_on_success.go	Removes per-interface mockgen directive (now consolidated).
internal/domain/flow_field_resolver.go	Removes per-interface mockgen directive (now consolidated).
internal/domain/flow_field_resolver_schema.go	Removes per-interface mockgen directive (now consolidated).
internal/domain/flow_auth_attempt.go	Removes per-interface mockgen directive (now consolidated).
internal/crypto/mock/hash.mock.go	Deletes standalone generated mock file (consolidated into crypto.mock.go).
internal/crypto/mock/crypto.mock.go	Regenerated: now also includes hash-related mocks in addition to encryption-related mocks.
internal/crypto/hash.go	Removes per-interface mockgen directive (now consolidated).
internal/crypto/generate.go	New package-level mockgen directive for the entire internal/crypto package.
internal/crypto/encryption.go	Removes per-interface mockgen directive (now consolidated).
apps/server/moon.yml	Updates server:generate to run the new Node generator script; extends inputs accordingly.
AGENTS.md	Updates contributor guidance to prefer moon run server:generate (with note that bare go generate ./... remains valid but slower).
.changeset/parallel-go-codegen.md	Adds an empty changeset documenting the performance-focused refactor.

Files not reviewed (1)

• internal/domain/mock/domain.mock.go: Generated file