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windy-git/alembic/versions/001_genesis.py
Grant Whitmer 659991b2bd G0: cell substrate — invariants made executable 
Strand G0 complete and VERIFIED against real Postgres, not asserted.

  - FastAPI plane, fail-closed provider seams, repair-pointer error taxonomy
  - migration 001: all 10 tables incl. repo_type NOT NULL and model_cards (I-7)
  - 17 invariant tests, ruff clean, vocabulary audit clean

Two bugs found by RUNNING it that review would not have caught:

  1. SQLAlchemy Enum persists .name, not .value — so RepoState.deleted_soft
     and CreatedVia.imported would have written labels migration 001 never
     declared, failing at runtime rather than at review. Pinned via
     values_callable.
  2. op.create_table asks each Enum to emit its own CREATE TYPE with no
     checkfirst, so the second reference raised DuplicateObject and the
     migration died halfway. Types are now created once, referenced with
     create_type=False.

Proven live, with the hostile env var set:
  - I-12: COMMIT_SHA=deadbeef... in the environment, /version reports real HEAD.
    That env pin is the documented root cause of nine sibling services
    misreporting their commit; here it is structurally ignored.
  - I-8: three unconfigured providers -> status degraded, HTTP 503, each saying
    'refusing to report healthy'. No mock, no false green.
  - G0.4: upgrade -> downgrade -> upgrade round-trip clean (10 -> 0 -> 10).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-11 14:19:28 -04:00

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"""001 genesis — the complete section 4 data model.
I-7: this migration creates `repo_type` NOT NULL and creates `model_cards`, even
though `repo_type=model` does not ship until v2. Shipping v1 with the v2 columns
absent is forbidden.
Every migration in this repo has a tested downgrade (G0.4). The sibling ecosystem
has a documented schema file that omits its own identity spine and ten tables; a
fresh deploy from it produces a server that cannot register a user. That happens
when migrations and documentation drift. Here the migration IS the truth.
Revision ID: 001_genesis
Revises:
Create Date: 2026-08-11
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects import postgresql
revision = "001_genesis"
down_revision = None
branch_labels = None
depends_on = None
SCHEMA = "windgit"
def upgrade() -> None:
op.execute(f"CREATE SCHEMA IF NOT EXISTS {SCHEMA}")
bind = op.get_bind()
# Create each type ONCE, explicitly, then reference it with create_type=False.
#
# Without create_type=False, `op.create_table` asks the Enum to emit its own
# CREATE TYPE with no checkfirst, so the second reference to an already-created
# type raises DuplicateObject and the migration dies halfway through. This bug
# is invisible to review and to any test that does not run against real
# Postgres -- it surfaced here only because `alembic upgrade head` was actually
# executed. Every migration in this repo gets run before it gets committed.
_DEFS = {
"repo_type": ("code", "model", "dataset"),
"visibility": ("private", "unlisted", "public"),
"repo_state": ("active", "archived", "deleted-soft"),
"created_via": ("portal", "agent", "import", "cloud-folder"),
"grant_role": ("owner", "maintainer", "writer", "reader"),
"mirror_health": ("healthy", "degraded", "failed"),
}
for name, labels in _DEFS.items():
postgresql.ENUM(*labels, name=name, schema=SCHEMA).create(bind, checkfirst=True)
def _ref(name: str) -> postgresql.ENUM:
return postgresql.ENUM(*_DEFS[name], name=name, schema=SCHEMA, create_type=False)
repo_type = _ref("repo_type")
visibility = _ref("visibility")
repo_state = _ref("repo_state")
created_via = _ref("created_via")
grant_role = _ref("grant_role")
mirror_health = _ref("mirror_health")
op.create_table(
"repos",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("identity_id", sa.String(64), nullable=False),
sa.Column("passport", sa.String(32)),
sa.Column("slug", sa.String(128), nullable=False),
sa.Column("display_name", sa.String(255), nullable=False),
# I-7 — NOT NULL, from migration 001, forever.
sa.Column("repo_type", repo_type, nullable=False),
sa.Column("gitea_repo_id", sa.Integer),
sa.Column("visibility", visibility, nullable=False, server_default="private"),
sa.Column("cloud_folder_ref", sa.String(255)),
sa.Column("default_branch", sa.String(128), server_default="main"),
sa.Column("lfs_bytes", sa.BigInteger, server_default="0"),
sa.Column("object_bytes", sa.BigInteger, server_default="0"),
sa.Column("state", repo_state, server_default="active"),
sa.Column("created_via", created_via, nullable=False),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
sa.UniqueConstraint("identity_id", "slug", name="uq_repos_identity_slug"),
schema=SCHEMA,
)
op.create_index("ix_repos_repo_type", "repos", ["repo_type"], schema=SCHEMA)
op.create_index("ix_repos_passport", "repos", ["passport"], schema=SCHEMA)
op.create_table(
"repo_grants",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("repo_id", postgresql.UUID(as_uuid=True), sa.ForeignKey(f"{SCHEMA}.repos.id", ondelete="CASCADE"), nullable=False),
sa.Column("grantee_identity_id", sa.String(64)),
sa.Column("grantee_passport", sa.String(32)),
sa.Column("role", grant_role, nullable=False),
sa.Column("granted_by", sa.String(64), nullable=False),
sa.Column("expires_at", sa.DateTime(timezone=True)),
sa.Column("confirm_ref", sa.String(128)),
sa.Column("revoked_at", sa.DateTime(timezone=True)),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
# The invariant lives in the database, not in application code.
sa.CheckConstraint(
"(grantee_identity_id IS NULL) <> (grantee_passport IS NULL)",
name="ck_grant_exactly_one_grantee",
),
schema=SCHEMA,
)
op.create_index("ix_grants_repo", "repo_grants", ["repo_id"], schema=SCHEMA)
op.create_table(
"repo_versions",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("repo_id", postgresql.UUID(as_uuid=True), sa.ForeignKey(f"{SCHEMA}.repos.id", ondelete="CASCADE"), nullable=False),
sa.Column("seq", sa.Integer, nullable=False),
sa.Column("commit_sha", sa.String(64), nullable=False),
sa.Column("tree_sha", sa.String(64)),
sa.Column("author_identity_id", sa.String(64)),
sa.Column("author_passport", sa.String(32)),
sa.Column("signed", sa.Boolean, server_default=sa.false()),
sa.Column("signature_verified", sa.Boolean, server_default=sa.false()),
sa.Column("ei_at_action", sa.String(32)),
sa.Column("message", sa.Text),
sa.Column("bytes_added", sa.BigInteger, server_default="0"),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
sa.UniqueConstraint("repo_id", "seq", name="uq_version_repo_seq"),
schema=SCHEMA,
)
op.create_index("ix_versions_commit", "repo_versions", ["commit_sha"], schema=SCHEMA)
op.create_table(
"mirror_state",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("repo_id", postgresql.UUID(as_uuid=True), sa.ForeignKey(f"{SCHEMA}.repos.id", ondelete="CASCADE"), nullable=False),
sa.Column("remote_url", sa.String(512), nullable=False),
sa.Column("direction", sa.String(16), server_default="push"),
sa.Column("last_success_at", sa.DateTime(timezone=True)),
sa.Column("last_error", sa.Text),
sa.Column("lag_seconds", sa.Integer),
sa.Column("state", mirror_health, server_default="healthy"),
schema=SCHEMA,
)
op.create_table(
"agent_tokens",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("passport", sa.String(32), nullable=False),
sa.Column("repo_id", postgresql.UUID(as_uuid=True), sa.ForeignKey(f"{SCHEMA}.repos.id", ondelete="CASCADE")),
sa.Column("scopes", postgresql.ARRAY(sa.String(64)), nullable=False),
sa.Column("token_hash", sa.String(128), nullable=False, unique=True),
sa.Column("expires_at", sa.DateTime(timezone=True)),
sa.Column("last_used_at", sa.DateTime(timezone=True)),
sa.Column("revoked_at", sa.DateTime(timezone=True)),
sa.Column("revoked_reason", sa.String(255)),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
schema=SCHEMA,
)
op.create_index("ix_agent_tokens_passport", "agent_tokens", ["passport"], schema=SCHEMA)
op.create_table(
"agent_actions",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("passport", sa.String(32), nullable=False),
sa.Column("repo_id", postgresql.UUID(as_uuid=True)),
sa.Column("action", sa.String(64), nullable=False),
sa.Column("ei_at_action", sa.String(32)),
sa.Column("confirm_ref", sa.String(128)),
sa.Column("result", sa.String(32), nullable=False),
sa.Column("cost_microcents", sa.BigInteger, server_default="0"),
sa.Column("ts", sa.DateTime(timezone=True), server_default=sa.func.now()),
schema=SCHEMA,
)
op.create_index("ix_agent_actions_passport_ts", "agent_actions", ["passport", "ts"], schema=SCHEMA)
# v2 surface, v1 schema. I-7.
op.create_table(
"model_cards",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("repo_id", postgresql.UUID(as_uuid=True), sa.ForeignKey(f"{SCHEMA}.repos.id", ondelete="CASCADE"), nullable=False, unique=True),
sa.Column("base_model", sa.String(255)),
sa.Column("license", sa.String(64)),
sa.Column("pipeline_tag", sa.String(64)),
sa.Column("tags", postgresql.ARRAY(sa.String(64))),
sa.Column("library", sa.String(64)),
sa.Column("card_yaml", postgresql.JSONB),
sa.Column("card_body", sa.Text),
schema=SCHEMA,
)
op.create_table(
"jobs",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("kind", sa.String(64), nullable=False),
sa.Column("payload", postgresql.JSONB, nullable=False),
sa.Column("state", sa.String(32), server_default="pending"),
sa.Column("attempts", sa.Integer, server_default="0"),
sa.Column("last_error", sa.Text),
sa.Column("run_after", sa.DateTime(timezone=True)),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
schema=SCHEMA,
)
op.create_table(
"webhook_events",
sa.Column("id", postgresql.UUID(as_uuid=True), primary_key=True),
sa.Column("event_type", sa.String(64), nullable=False),
sa.Column("payload", postgresql.JSONB, nullable=False),
sa.Column("delivered", sa.Boolean, server_default=sa.false()),
sa.Column("attempts", sa.Integer, server_default="0"),
sa.Column("last_error", sa.Text),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
schema=SCHEMA,
)
def downgrade() -> None:
for table in (
"webhook_events", "jobs", "model_cards", "agent_actions",
"agent_tokens", "mirror_state", "repo_versions", "repo_grants", "repos",
):
op.drop_table(table, schema=SCHEMA)
bind = op.get_bind()
for name in ("mirror_health", "grant_role", "created_via", "repo_state", "visibility", "repo_type"):
postgresql.ENUM(name=name, schema=SCHEMA).drop(bind, checkfirst=True)
# Deliberately NOT dropping the schema. `alembic_version` lives inside
# `windgit` (env.py sets version_table_schema), so a DROP SCHEMA CASCADE here
# deletes alembic's own bookkeeping table out from under the migration that
# is still running, and the final DELETE FROM alembic_version fails. The
# schema is cheap to leave; the tables and types are what this reverses.
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