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Restructure identity tables: separate credential types, add peer_credentials, specify FK cascades and indexes

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Identity tables were derived from hub's PostgreSQL schema but simplified
without documenting what was removed or why. This restructures them for the
current auth landscape (API key + wraith SSH/cert-authority):

- ADR-049: Separate api_keys and peer_credentials tables (different lookup
  patterns, columns, lifecycles), remove Gitea columns, map hub data→metadata
- ADR-050: Extract SHA-256 vs KDF decision from inline spec text
- Add peer_credentials table for SSH key and cert-authority auth
- Specify all FK cascade behaviors within system DB (RESTRICT, CASCADE, SET NULL)
- Complete index specifications for all identity tables
- Add scope boundary section (storage owns schemas, not auth/authorization)
- Update audit_logs with credentialId+credentialType polymorphic reference
- Add 3 new open questions (OQ-33/34/35) for credential type expansion
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glm-5.1
2026-06-02 12:33:20 +00:00
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--- ---
status: draft status: draft
last_updated: 2026-05-31 last_updated: 2026-06-02
--- ---
# @alkdev/storage Architecture # @alkdev/storage Architecture
@@ -79,6 +79,11 @@ remain to be implemented.
| [043](decisions/043-graph-type-scope.md) | Graph type scope — system/tenant/user | Accepted | | [043](decisions/043-graph-type-scope.md) | Graph type scope — system/tenant/user | Accepted |
| [044](decisions/044-drizzle-honker-adapter.md) | Drizzle-Honker session adapter | Accepted | | [044](decisions/044-drizzle-honker-adapter.md) | Drizzle-Honker session adapter | Accepted |
| [045](decisions/045-org-members-authoritative-belongsto-derived.md) | organization_members authoritative, BelongsToEdge derived | Accepted | | [045](decisions/045-org-members-authoritative-belongsto-derived.md) | organization_members authoritative, BelongsToEdge derived | Accepted |
| [046](decisions/046-fold-drizzlebox-as-utils.md) | Fold @alkdev/drizzlebox as src/sqlite/utils | Accepted |
| [047](decisions/047-honker-event-target.md) | HonkerEventTarget adapter for pubsub | Accepted |
| [048](decisions/048-operation-specs-as-repo-surface.md) | OperationSpecs as repository surface | Accepted |
| [049](decisions/049-identity-schema-restructuring.md) | Identity schema restructuring — separate credential tables, remove Gitea, data→metadata | Accepted |
| [050](decisions/050-sha256-for-api-key-hashing.md) | SHA-256 for machine-generated API keys | Accepted |
### Open Questions ### Open Questions

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# ADR-049: Identity Schema Restructuring
## Status
Accepted
## Context
The identity tables in `sqlite-host.md` were derived from the hub's PostgreSQL
schema (`@alkdev/hub/docs/architecture/storage/identity.md`) but simplified
without documenting what was removed and why. This creates ambiguity for
implementation:
1. **Gitea columns** (`accounts.giteaUsername`, `organizations.giteaOrgName`)
were dropped without documented rationale. These are hub-specific
integration columns — a storage package should not couple to a particular
git hosting provider. Git association, when needed, belongs in a metagraph
instance (e.g., a project graph with git repo metadata) or a downstream
consumer's schema.
2. **`data` JSONB columns** on `accounts` and `organizations` in the hub schema
were silently dropped. The hub used these for account preferences/profile
and org billing/settings. Storage's `commonCols.metadata` serves the same
purpose — an extension namespace following `_subsystem.key` convention. The
mapping from hub `data` to storage `metadata` is unambiguous but was never
stated.
3. **Single `api_keys` table** assumes keypal-style bearer token auth only. The
@alkdev platform now has two authentication mechanisms:
- **API key** (keypal-style): client sends a bearer token, hub hashes it,
looks up by `keyHash`. Transport: HTTP/WebSocket.
- **Peer credential** (wraith-style): client presents an Ed25519 public key
or OpenSSH certificate over an SSH channel (TCP/TLS/Iroh). Server
validates against known fingerprints. Transport: wraith SSH tunnel.
These credential types have fundamentally different query patterns (hash
lookup vs fingerprint lookup), different columns (keyHash makes no sense
for SSH keys; publicKeyFingerprint makes no sense for API keys), and
different lifecycles (rotation vs addition/removal). A single table would be
mostly nulls on either side.
4. **Missing FK cascade behavior** — Identity tables live in the same system
DB, so real FK constraints apply. The current spec uses "logical reference"
language (appropriate for cross-DB scoping columns on `graphs`) for
relationships that are intra-database and should have proper cascades.
5. **Missing columns** — The hub spec includes `api_keys.description`,
`api_keys.rotatedToId`, `api_keys.lastUsedAt`, and `audit_logs.sessionId`
that were dropped from storage without rationale.
## Decision
### 1. Separate credential tables by type
Two tables with distinct columns, not a unified `credentials` table with a
type discriminator:
| Table | Auth mechanism | Lookup pattern | Transport |
|-------|----------------|----------------|-----------|
| `api_keys` | Bearer token | Hash token → look up `keyHash` | HTTP/WebSocket |
| `peer_credentials` | SSH key / cert-authority | Present fingerprint → look up `fingerprint` | wraith (SSH over TCP/TLS/Iroh) |
Rationale: Query patterns, columns, and lifecycles differ fundamentally.
Credential type proliferation is expected to be low (3-4 types ever). A new
table per type is acceptable. This extends the design principle established by
ADR-002: the metagraph pattern serves graph-shaped data (dynamic schemas,
traversal queries); dedicated tables serve fixed-schema data with known
columns and relational query patterns.
**Decision criterion for future credential types**: Credential types sharing
the same lookup column get a table with a `credentialType` discriminator.
Credential types requiring different lookup columns get their own table. For
example, a future `tls_certificate` credential that uses fingerprint-based
lookup would join `peer_credentials` with a new `credentialType` value. A
credential type using a different lookup column (e.g., a client identifier)
would warrant a new table.
### 2. Remove Gitea columns
`accounts.giteaUsername` and `organizations.giteaOrgName` are removed. Git
hosting integration is a consumer concern, not a storage infrastructure
concern. When a downstream system needs to associate accounts or organizations
with git hosting, it stores that association in:
- A metagraph instance (e.g., a project graph with a `GitRepositoryNode`)
- Consumer-side schema extensions via `commonCols.metadata`
### 3. Hub `data` column maps to storage `commonCols.metadata`
The hub's `accounts.data` and `organizations.data` JSONB columns are not
present in storage's identity tables. Their purpose (extensible account/org
metadata) is served by `commonCols.metadata`, which follows the
`_subsystem.key` convention. No data is lost — the extensible namespace
already exists. The hub maps `data` fields into `metadata` keys when
migrating.
### 4. Add `peer_credentials` table
A new table for SSH key and certificate-authority authentication over wraith
transport:
| Column | Type | Notes |
|--------|------|-------|
| commonCols | — | id, metadata, createdAt, updatedAt |
| ownerId | text NOT NULL | FK → accounts.id (CASCADE) |
| credentialType | text NOT NULL | `ssh_key`, `cert_authority` |
| fingerprint | text NOT NULL UNIQUE | Ed25519 key fingerprint (SHA-256) |
| publicKeyData | text NOT NULL | Full public key in OpenSSH format |
| name | text | Human-readable label |
| enabled | integer NOT NULL DEFAULT 1 | Immediate disable switch |
| expiresAt | integer (timestamp) | Null = never |
| revokedAt | integer (timestamp) | Null = active |
The `credentialType` discriminator separates key entries from CA entries within
a single table because their query pattern (look up by fingerprint) is
identical. Cert-specific data (principals, restrictions, caFingerprint) goes
in `metadata`.
### 5. Add back useful API key columns
| Column | Reason |
|--------|--------|
| `rotatedToId` | API key rotation tracking — sets which key replaced this one |
| `lastUsedAt` | Stale key cleanup and access pattern analysis |
`description` is not added. `name` + `metadata` covers labeling needs.
### 6. Specify FK cascade behavior within system DB
All identity table FKs are intra-database and use real constraints:
| Relationship | onDelete | Rationale |
|-------------|----------|-----------|
| organizations.ownerId → accounts.id | RESTRICT | Cannot delete owner account while org exists |
| organization_members.orgId → organizations.id | CASCADE | Org deletion removes memberships |
| organization_members.accountId → accounts.id | CASCADE | Account deletion removes memberships |
| api_keys.ownerId → accounts.id | CASCADE | Account deletion removes API keys |
| peer_credentials.ownerId → accounts.id | CASCADE | Account deletion removes peer credentials |
| audit_logs.ownerId → accounts.id | RESTRICT | Audit integrity — deactivate account instead of delete |
`audit_logs.keyId` and `audit_logs.credentialId` are logical references (not
FK) because they may reference rows in either `api_keys` or `peer_credentials`,
and the referenced table depends on the audit event type.
### 7. Update audit_logs for multi-credential world
Replace `keyId` (API key only) with polymorphic credential references:
| Column | Type | Notes |
|--------|------|-------|
| credentialId | text | Logical reference to api_keys.id or peer_credentials.id |
| credentialType | text | `api_key`, `peer_credential`, or null |
This replaces the previous `keyId` column. The `credentialType` discriminator
tells the consumer which table to look up (same pattern as
`graphs.ownerId` — logical reference, not FK).
`sessionId` is not added. Session correlation is a hub concern, not a storage
infrastructure concern. When needed, it goes in `metadata`.
## Consequences
**Positive:**
- Two credential types covered from the start — API key auth and wraith SSH
auth can both be stored and looked up efficiently
- Each credential table has native columns for its specific fields — no
null-heavy rows, no JSON lookups for high-query fields
- Gitea coupling removed — storage doesn't depend on a specific git hosting
provider
- FK cascades specified — implementers know exactly what happens on deletion
- Clear provenance mapping — hub's `data` → storage's `metadata` is explicit
**Negative:**
- Two credential tables instead of one — but the columns don't overlap and
query patterns differ, so this is the correct trade-off
- `audit_logs.credentialId`/`credentialType` polymorphic reference — no FK
constraint, consumer resolves the table (same pattern as existing
cross-DB references)
- Hub must migrate its existing identity schema when consuming storage's
definitions — `keyId` → `credentialId` + `credentialType`, `data` → `metadata`,
Gitea columns to metagraph or consumer metadata
- `peer_credentials` credential types may grow (e.g., `tls_certificate`) —
handled by adding enum values, not new tables, since query patterns within
peer auth are similar
## References
- ADR-002: Metagraph over domain-specific tables
- ADR-041: Identity tables in storage package
- ADR-040: System DB + tenant DB separation
- Hub identity tables: `/workspace/@alkdev/hub/docs/architecture/storage/identity.md`
- Wraith NAPI + pubsub: `/workspace/@alkdev/wraith/docs/architecture/napi-and-pubsub.md`
- Wraith auth: `/workspace/@alkdev/wraith/docs/architecture/decisions/012-auth-ed25519-and-cert-authority.md`

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# ADR-050: SHA-256 for Machine-Generated API Keys
## Status
Accepted
## Context
API key hashing has two common approaches:
1. **Fast hash** (SHA-256): O(1) verification at high throughput. Standard for
machine-generated tokens.
2. **Slow KDF** (bcrypt, Argon2): Intentionally expensive to slow brute-force
attacks. Standard for human-chosen passwords.
The choice depends on the input entropy. Human passwords are low-entropy
(maybe 30-40 bits of actual randomness even with complexity requirements), so
brute-force is feasible unless the hash is slow. Machine-generated keys are
high-entropy (128-bit+ randomness from `crypto.randomUUID()` or equivalent),
making brute-force computationally infeasible even with a fast hash.
## Decision
Use SHA-256 for API key hashing. Do not use bcrypt or Argon2.
The API keys in `@alkdev/storage` are machine-generated secrets with 128-bit+
entropy. An attacker attempting to brute-force a SHA-256 hash of such a key
faces 2^128 possible inputs — infeasible regardless of hash speed. Slow KDFs
add latency (50-200ms per verification) without meaningful security
improvement for high-entropy inputs.
## Consequences
**Positive:**
- Fast O(1) verification — critical for high-throughput API authentication
- Widely supported — every language/runtime has SHA-256 built in
- Simple implementation — no salt generation, no cost parameter tuning
**Negative:**
- If a consumer generates low-entropy keys (short, predictable patterns),
SHA-256 provides less protection against brute-force than a slow KDF. This
is a consumer responsibility — the storage table schema cannot enforce key
generation quality.
- SHA-256 is not post-quantum resistant. This is acceptable for API keys,
which can be rotated, unlike passwords which are often long-lived.
## References
- `api_keys.keyHash` in [sqlite-host.md](../sqlite-host.md)
- Hub ADR-010: SHA-256 for API key hashing (same decision, provenance)

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--- ---
status: draft status: draft
last_updated: 2026-06-01 last_updated: 2026-06-02
--- ---
# Open Questions Tracker # Open Questions Tracker
@@ -12,7 +12,7 @@ architecture documents, organized by theme.
| Status | Count | | Status | Count |
|--------|-------| |--------|-------|
| Open | 10 | | Open | 13 |
| Resolved (this revision) | 18 | | Resolved (this revision) | 18 |
| Previously resolved | 11 | | Previously resolved | 11 |
@@ -30,6 +30,9 @@ architecture documents, organized by theme.
- **OQ-30** (composite event target for single-node hub) — latency optimization - **OQ-30** (composite event target for single-node hub) — latency optimization
- **OQ-31** (consumer naming for durable subscriptions) — restart stability - **OQ-31** (consumer naming for durable subscriptions) — restart stability
- **OQ-32** (Drizzle Kit migration compatibility) — custom adapter - **OQ-32** (Drizzle Kit migration compatibility) — custom adapter
- **OQ-33** (peer_credentials SSH key type expansion) — defer until needed
- **OQ-34** (hub api_keys migration path) — needed for hub transition
- **OQ-35** (peer_credentials Iroh auth metadata) — defer until Iroh NAPI complete
## Theme 1: Package Boundaries and Dependencies ## Theme 1: Package Boundaries and Dependencies
@@ -272,6 +275,29 @@ architecture documents, organized by theme.
- **Priority**: medium - **Priority**: medium
- **Notes**: Drizzle Kit supports SQLite migrations but expects `better-sqlite3` or `libsql`. Need to verify `drizzle-kit push`/`drizzle-kit generate` works with the custom Honker adapter, or whether we need a custom migration runner. - **Notes**: Drizzle Kit supports SQLite migrations but expects `better-sqlite3` or `libsql`. Need to verify `drizzle-kit push`/`drizzle-kit generate` works with the custom Honker adapter, or whether we need a custom migration runner.
## Theme 9: Identity and Credentials
### OQ-33: Should `peer_credentials.credentialType` support additional SSH key types beyond Ed25519?
- **Origin**: [sqlite-host.md](sqlite-host.md)
- **Status**: open
- **Priority**: low
- **Notes**: Current spec assumes Ed25519 only (matching wraith ADR-012). RSA and ECDSA keys are common in legacy SSH deployments. If wraith adds support for additional key types, `credentialType` values like `ssh_key_rsa`, `ssh_key_ecdsa` or a `keyType` column may be needed. Defer until wraith supports additional key types.
### OQ-34: How should hub `api_keys` data migrate to the restructured storage schema?
- **Origin**: [sqlite-host.md](sqlite-host.md), [ADR-049](decisions/049-identity-schema-restructuring.md)
- **Status**: open
- **Priority**: medium
- **Notes**: The hub's existing PostgreSQL `api_keys` table has columns (`description`, `keyId`) that map differently to storage's schema. `description` maps to `metadata` (no dedicated column). `keyId` (FK → api_keys.id) becomes `credentialId` + `credentialType` (polymorphic). Hub's `data` columns map to `commonCols.metadata`. A migration script is needed when the hub consumes storage's identity tables.
### OQ-35: Should `peer_credentials` support Iroh-specific authentication metadata?
- **Origin**: [sqlite-host.md](sqlite-host.md)
- **Status**: open
- **Priority**: low
- **Notes**: Iroh connections use node IDs (base58-encoded) for addressing. If Iroh provides an authentication mechanism beyond SSH key auth (e.g., node ID-based trust), `peer_credentials` may need an iroh-specific credential type or additional columns. The Iroh NAPI wrapper is not yet complete; defer until its pubsub integration is implemented.
## ADR Impact ## ADR Impact
| ADR | Resolves | Informs | | ADR | Resolves | Informs |
@@ -295,3 +321,5 @@ architecture documents, organized by theme.
| ADR-046 | | OQ-17 | | ADR-046 | | OQ-17 |
| ADR-047 | OQ-26 | OQ-30 | | ADR-047 | OQ-26 | OQ-30 |
| ADR-048 | OQ-17 (updated), OQ-18 (updated), OQ-19 (updated) | | | ADR-048 | OQ-17 (updated), OQ-18 (updated), OQ-19 (updated) | |
| ADR-049 | | OQ-33, OQ-34, OQ-35 |
| ADR-050 | | | |

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--- ---
status: draft status: draft
last_updated: 2026-06-01 last_updated: 2026-06-02
--- ---
# SQLite Host # SQLite Host
@@ -38,7 +38,8 @@ src/sqlite/
│ │ ├── accounts.ts # accounts table + select/insert schemas │ │ ├── accounts.ts # accounts table + select/insert schemas
│ │ ├── organizations.ts # organizations table + select/insert schemas │ │ ├── organizations.ts # organizations table + select/insert schemas
│ │ ├── organization_members.ts # org membership + select/insert schemas │ │ ├── organization_members.ts # org membership + select/insert schemas
│ │ ├── api_keys.ts # API keys (keypal) + select/insert schemas │ │ ├── api_keys.ts # API key credentials + select/insert schemas
│ │ ├── peer_credentials.ts # SSH key / cert-authority credentials + select/insert schemas
│ │ ├── audit_logs.ts # audit trail + select/insert schemas │ │ ├── audit_logs.ts # audit trail + select/insert schemas
│ │ └── index.ts # barrel re-export │ │ └── index.ts # barrel re-export
│ ├── metagraph/ │ ├── metagraph/
@@ -205,86 +206,285 @@ type deletion if active graphs reference it.
## Identity Tables ## Identity Tables
Identity tables live in the **system DB** (ADR-040, ADR-041). They provide Identity tables live in the **system DB** (ADR-040, ADR-041). They provide
multi-tenant authentication and authorization infrastructure. These tables are multi-tenant authentication and authorization infrastructure. Storage owns the
derived from the hub's existing identity tables; the schemas are aligned but table schemas and FK constraints; it does not own authentication logic,
simplified for the storage package's scope. authorization rules, key lifecycle, or credential verification — those are
consumer concerns.
The identity schemas are derived from the hub's PostgreSQL identity tables
(ADR-049). Gitea-specific columns are removed (git hosting integration is a
consumer concern, modeled in metagraph instances or consumer metadata). The
hub's `data` JSONB columns map to `commonCols.metadata` (same extension
namespace, `_subsystem.key` convention).
### Scope Boundary
Storage's identity tables provide **persistence and structural constraints**.
Consumer concerns NOT in storage's scope:
- Key generation, hashing, and verification (keypal, wraith handle this)
- Authentication protocol flow (hub/wraith handle this)
- Authorization and scope evaluation (ACL graph + operations enforce this)
- Account lifecycle policy (when to suspend, deactivate, transfer ownership)
- Key rotation and revocation orchestration
- Session and connection management
### `accounts` ### `accounts`
| Column | Type | Notes | | Column | Type | Constraints | Notes |
|---------------|---------------------|-------| |-------------|---------------------|----------------------------------------|-------------------------------------------------------|
| commonCols | — | id, metadata, createdAt, updatedAt | | id | text | PK | Consumer-generated UUID |
| email | text NOT NULL UNIQUE | Unique identifier | | metadata | text (JSON) | default `{}` | Extension namespace (`_subsystem.key`). Replaces hub's `data` JSONB column (ADR-049). Account preferences, profile data. |
| displayName | text | Display name | | createdAt | integer (timestamp) | not null, default `now` | |
| accessLevel | text NOT NULL DEFAULT `user` | `admin`, `user`, `service` | | updatedAt | integer (timestamp) | not null, default `now` | |
| status | text NOT NULL DEFAULT `active` | `active`, `suspended`, `deactivated` | | email | text | not null, **unique** | Primary identifier. Service accounts may use deployment-configured reserved patterns. |
| displayName | text | | Display name |
| accessLevel | text | not null, default `user` | `admin`, `user`, `service` |
| status | text | not null, default `active` | `active`, `suspended`, `deactivated` |
**Indexes**: `unq_accounts_email` UNIQUE on `(email)`. **`accessLevel` semantics**: `admin` manages all resources across
organizations. `user` manages own resources and org-scoped resources. `service`
is an automated account (LLM workers, spoke credentials, CI tokens) — no git
hosting link required.
**`status` semantics**: `active` can authenticate. `suspended` is admin-locked
(security hold). `deactivated` is user-initiated shutdown. Suspended and
deactivated accounts retain owned resources (RESTRICT FK) but cannot
authenticate.
**Indexes**: `unq_accounts_email` UNIQUE on `(email)`,
`idx_accounts_access_level` on `(accessLevel)`,
`idx_accounts_status` on `(status)`.
No `giteaUsername` column — git hosting integration is a consumer concern
(ADR-049). When needed, store git associations in `metadata` or a metagraph
instance.
### `organizations` ### `organizations`
| Column | Type | Notes | | Column | Type | Constraints | Notes |
|----------|---------------------|-------| |--------|---------------------|----------------------------------------|-------------------------------------------------|
| commonCols | — | id, metadata, createdAt, updatedAt | | id | text | PK | Consumer-generated UUID |
| name | text NOT NULL UNIQUE | Organization name | | metadata | text (JSON) | default `{}` | Extension namespace. Replaces hub's `data` JSONB column (ADR-049). Org settings, billing data. |
| slug | text NOT NULL UNIQUE | URL-friendly identifier | | createdAt | integer (timestamp) | not null, default `now` | |
| ownerId | text NOT NULL | Logical reference to accounts.id | | updatedAt | integer (timestamp) | not null, default `now` | |
| name | text | not null, **unique** | Organization name |
| slug | text | not null, **unique** | URL-friendly identifier |
| ownerId | text | not null, FK → accounts.id (**RESTRICT**) | Administrative/transferable owner. Cannot delete owner account while org exists. Transfer ownership first. |
**Indexes**: `unq_organizations_name` UNIQUE on `(name)`, `unq_organizations_slug` UNIQUE on `(slug)`. **`ownerId` semantics**: The administrative owner of the organization. This
account MUST also have `membershipLevel: 'owner'` in `organization_members`
(enforced by consumer). To change the owner, the consumer calls a transfer
ownership operation that: (1) validates the new owner has `membershipLevel:
'owner'`, (2) updates `ownerId`, (3) optionally demotes the old owner's
membership level. RESTRICT cascade prevents deleting the owner account while
the org exists.
**Indexes**: `unq_organizations_name` UNIQUE on `(name)`,
`unq_organizations_slug` UNIQUE on `(slug)`,
`idx_organizations_owner_id` on `(ownerId)`.
**Dual ownership representation**: `organizations.ownerId` and
`organization_members.membershipLevel: 'owner'` both represent ownership. The
column exists for efficient lookup (a single indexed read for "who owns this
org?") and RESTRICT FK semantics (cannot delete the owner account while the
org exists). The membership row exists for relational queries ("list all
owners of this org"). The consumer-enforced invariant is: `ownerId` always
references an account that also has `membershipLevel: 'owner'` in
`organization_members`. The consumer must maintain this invariant on
membership changes and ownership transfers.
No `giteaOrgName` column — git hosting integration is a consumer concern
(ADR-049).
### `organization_members` ### `organization_members`
| Column | Type | Notes | | Column | Type | Constraints | Notes |
|-----------------|---------------------|-------| |-----------------|---------------------|----------------------------------------|--------------------------------------|
| commonCols | — | id, metadata, createdAt, updatedAt | | id | text | PK | Consumer-generated UUID |
| orgId | text NOT NULL | FK → organizations.id (cascade) | | metadata | text (JSON) | default `{}` | Extension namespace |
| accountId | text NOT NULL | FK → accounts.id (cascade) | | createdAt | integer (timestamp) | not null, default `now` | |
| membershipLevel | text NOT NULL | `owner`, `admin`, `member` | | updatedAt | integer (timestamp) | not null, default `now` | |
| orgId | text | not null, FK → organizations.id (**CASCADE**) | Org deletion removes memberships |
| accountId | text | not null, FK → accounts.id (**CASCADE**) | Account deletion removes memberships |
| membershipLevel | text | not null | `owner`, `admin`, `member` |
**Unique constraint**: `(orgId, accountId)`. **Unique constraint**: `(orgId, accountId)` — one membership per account per org.
**Indexes**: `idx_org_members_account_id` on `(accountId)`.
**`membershipLevel` semantics**: `owner` has full control including member
management. `admin` can manage projects and members. `member` can access org
resources. Distinct from `organizations.ownerId` — `membershipLevel` is
runtime access control; `ownerId` is the administrative/transferable owner.
This table is the authoritative source for org membership (ADR-045). The ACL This table is the authoritative source for org membership (ADR-045). The ACL
graph's `BelongsToEdge` is derived from it — when membership changes, the graph's `BelongsToEdge` is derived from it — when membership changes, the
consumer writes the SQL row first, then creates or removes the ACL edge. consumer writes the SQL row first, then creates or removes the ACL edge.
**Indexes**: `unq_org_members_org_account` UNIQUE on `(orgId, accountId)`,
`idx_org_members_account_id` on `(accountId)`,
`idx_org_members_org_id` on `(orgId)`.
### `api_keys` ### `api_keys`
| Column | Type | Notes | API key credentials for bearer token authentication. The client sends a raw
|------------|---------------------|-------| key; the consumer hashes it and looks up by `keyHash`. Storage does not
| commonCols | — | id, metadata, createdAt, updatedAt | perform hashing or verification — that is a consumer concern (keypal, hub).
| ownerId | text NOT NULL | Logical reference to accounts.id |
| keyHash | text NOT NULL UNIQUE | SHA-256 hash (never stores raw key) |
| name | text | Human-readable key label |
| enabled | integer NOT NULL DEFAULT 1 | Disable without revoking |
| expiresAt | integer (timestamp) | When the key expires (null = never) |
| revokedAt | integer (timestamp) | When revoked (null = active) |
**Indexes**: `unq_api_keys_key_hash` UNIQUE on `(keyHash)`, `idx_api_keys_owner_id` on `(ownerId)`. | Column | Type | Constraints | Notes |
|------------|---------------------|----------------------------------------|------------------------------------------------------|
| id | text | PK | Consumer-generated UUID |
| metadata | text (JSON) | default `{}` | Extension namespace. Scope data: `metadata.scopes` (`string[]`), `metadata.resources` (`Record<string, string[]>`), `metadata.tags` (`string[]`). Consumer provides the adapter (e.g., `HubKeyStorage` for keypal). Scopes remain in metadata rather than as native columns because scope schemas vary by consumer — keypal uses colon-separated hierarchies, other consumers may differ. |
| createdAt | integer (timestamp) | not null, default `now` | |
| updatedAt | integer (timestamp) | not null, default `now` | |
| ownerId | text | not null, FK → accounts.id (**CASCADE**) | Account deletion removes API keys |
| keyHash | text | not null, **unique** | SHA-256 hash of raw key. Never stores raw key. |
| name | text | | Human-readable key label |
| enabled | integer | not null, default 1 | Immediate disable switch (1 = enabled, 0 = disabled) |
| expiresAt | integer (timestamp) | | When the key expires (null = never) |
| revokedAt | integer (timestamp) | | When the key was revoked (null = active). Permanent. |
| rotatedToId | text | | Self-reference to `api_keys.id` — the key that replaced this one (null if not rotated). |
| lastUsedAt | integer (timestamp) | | Last authentication time. Null if never used. |
Keypal scope data is stored in `metadata` (`metadata.scopes`, `metadata.resources`). **Key lifecycle states**: enabled+not expired = active. enabled+expired =
The hub provides a `HubKeyStorage` adapter that reads/writes this table to rejected. disabled = rejected regardless of expiration. revoked = permanently
implement keypal's `Storage` interface. disabled regardless of enabled/expiry.
**Rotation**: When a key is rotated, the consumer creates a new `api_keys` row
and sets the old key's `rotatedToId` to the new key's id. The old key's
`revokedAt` is set at the same time. This provides an audit trail of key
rotation without requiring a separate rotation history table.
**SHA-256 rationale**: API keys are high-entropy machine-generated strings
(128-bit+). Brute-force against SHA-256 is infeasible for such inputs. Slow
KDFs (bcrypt, Argon2) are unnecessary for machine keys — they add latency
without meaningful security improvement. (ADR-050)
**Indexes**: `unq_api_keys_key_hash` UNIQUE on `(keyHash)`,
`idx_api_keys_owner_id` on `(ownerId)`,
`idx_api_keys_enabled` on `(enabled)`,
`idx_api_keys_active` on `(ownerId)` WHERE `revokedAt IS NULL AND enabled = 1`
### `peer_credentials`
SSH key and certificate-authority credentials for wraith transport
authentication. The client presents an Ed25519 public key or OpenSSH
certificate; the consumer validates against the stored fingerprint. Storage
does not perform SSH authentication — that is a consumer concern (wraith,
hub).
| Column | Type | Constraints | Notes |
|-----------------|---------------------|----------------------------------------|------------------------------------------------------|
| id | text | PK | Consumer-generated UUID |
| metadata | text (JSON) | default `{}` | Extension namespace. Cert data: `metadata.principals` (`string[]`), `metadata.restrictions` (`string[]`), `metadata.caFingerprint` (`string`, for cert-authority entries only). |
| createdAt | integer (timestamp) | not null, default `now` | |
| updatedAt | integer (timestamp) | not null, default `now` | |
| ownerId | text | not null, FK → accounts.id (**CASCADE**) | Account deletion removes peer credentials |
| credentialType | text | not null | `ssh_key`, `cert_authority` |
| fingerprint | text | not null, **unique** | Ed25519 key fingerprint (SHA-256, OpenSSH format) |
| publicKeyData | text | not null | Full public key in OpenSSH format (`ssh-ed25519 AAAA...`) |
| name | text | | Human-readable label |
| enabled | integer | not null, default 1 | Immediate disable switch |
| expiresAt | integer (timestamp) | | When the credential expires (null = never). Certificates carry expiry; standalone keys typically don't. |
| revokedAt | integer (timestamp) | | When the credential was revoked (null = active). |
**`credentialType` semantics**: `ssh_key` is an individual public key. The
consumer verifies the key against known fingerprints. `cert_authority` is a
trusted CA public key. The consumer validates certificates signed by this CA
against the stored fingerprint. Both types share the same lookup pattern
(present fingerprint → find by fingerprint → check owner + enable + expiry +
revocation), which is why they share a table.
**Adding new credential types** (ADR-049): Credential types sharing the same
lookup column as `peer_credentials` (fingerprint-based) add a new
`credentialType` value to this table. Credential types requiring different
lookup columns warrant their own table. (OQ-33) Current types assume Ed25519
only; additional SSH key types may require `credentialType` expansion.
**Fingerprint format**: OpenSSH SHA-256 fingerprint (base64, no prefix). Used
for lookup during SSH authentication. The `publicKeyData` column stores the
full key for reconstruction/verification when needed.
**Indexes**: `unq_peer_credentials_fingerprint` UNIQUE on `(fingerprint)`,
`idx_peer_credentials_owner_id` on `(ownerId)`,
`idx_peer_credentials_credential_type` on `(credentialType)`,
`idx_peer_credentials_active` on `(ownerId)` WHERE `revokedAt IS NULL AND enabled = 1`
### `audit_logs` ### `audit_logs`
| Column | Type | Notes | Append-only audit trail for security-relevant events. The consumer (hub)
|----------|---------------------|-------| writes entries for key operations, authentication events, membership changes,
| commonCols | — | id, metadata, createdAt, updatedAt | and other auditable actions. The consumer is responsible for reading and
| action | text NOT NULL | `created`, `revoked`, `rotated`, `login`, `access_denied` | displaying audit data.
| ownerId | text NOT NULL | Logical reference to accounts.id |
| keyId | text | Logical reference to api_keys.id (nullable) |
| orgId | text | Logical reference to organizations.id (nullable) |
| details | text (JSON) | Action-specific context |
**Indexes**: `idx_audit_logs_owner_id` on `(ownerId)`, `idx_audit_logs_action` on `(action)`, `idx_audit_logs_created_at` on `(createdAt)`. | Column | Type | Constraints | Notes |
|----------------|---------------------|----------------------------------------|------------------------------------------------------|
| id | text | PK | Consumer-generated UUID |
| metadata | text (JSON) | default `{}` | Extension namespace. Session context: `metadata.sessionId` (when relevant). |
| createdAt | integer (timestamp) | not null, default `now` | |
| updatedAt | integer (timestamp) | not null, default `now` | |
| action | text | not null | `created`, `revoked`, `rotated`, `enabled`, `disabled`, `login`, `access_denied` |
| ownerId | text | not null, FK → accounts.id (**RESTRICT**) | The identity performing the action. RESTRICT prevents account deletion when audit entries exist — deactivate instead. |
| credentialId | text | | Logical reference to api_keys.id or peer_credentials.id (nullable — not all events are credential-related). |
| credentialType | text | | `api_key`, `peer_credential`, or null. Discriminator for `credentialId` — tells the consumer which table to look up. |
| orgId | text | FK → organizations.id (**SET NULL**) | Organization context. Null for personal actions. Set null on org deletion to preserve audit trail. |
| details | text (JSON) | | Action-specific context (IP, user agent, scope changes, etc.) |
**`action` enum is extensible**: The initial set covers API key operations
and basic auth events. Additional actions for account, membership, and
organization lifecycle events (e.g., `account_created`, `membership_added`,
`org_created`) should be added by consumers as those features are implemented.
**`credentialId` + `credentialType` polymorphic reference**: Replaces the
previous `keyId` column (API key only). The pair allows audit entries to
reference either credential table. No FK constraint — the consumer resolves
the table based on `credentialType` (ADR-049).
**`orgId` FK with SET NULL**: Unlike `credentialId` (polymorphic, no single
target table), `orgId` always references `organizations.id` within the same
system.db. A real FK with `SET NULL` preserves the audit trail on org deletion
(nulling the org reference without deleting the audit entry) while enforcing
referential integrity at the database level rather than relying on consumer
discipline.
**Indexes**: `idx_audit_logs_owner_id` on `(ownerId)`,
`idx_audit_logs_credential_id` on `(credentialId)`,
`idx_audit_logs_action` on `(action)`,
`idx_audit_logs_created_at` on `(createdAt)`,
`idx_audit_logs_org_id` on `(orgId)`.
### FK Cascade Behavior (System DB)
All identity table FKs are intra-database (same system.db file). Real
constraints apply, not logical references.
| Relationship | onDelete | Rationale |
|-------------|----------|-----------|
| organizations.ownerId → accounts.id | RESTRICT | Cannot delete owner account while org exists. Transfer ownership first. |
| organization_members.orgId → organizations.id | CASCADE | Org deletion removes memberships |
| organization_members.accountId → accounts.id | CASCADE | Account deletion removes memberships |
| api_keys.ownerId → accounts.id | CASCADE | Account deletion removes API keys |
| peer_credentials.ownerId → accounts.id | CASCADE | Account deletion removes peer credentials |
| audit_logs.ownerId → accounts.id | RESTRICT | Audit integrity — deactivate accounts instead of deleting. Preserves accountability. |
| audit_logs.orgId → organizations.id | SET NULL | Org deletion preserves audit trail (org reference nulled, entry retained). |
Polymorphic references (no FK, consumer resolves):
`audit_logs.credentialId` → `api_keys.id` or `peer_credentials.id`
(disambiguated by `audit_logs.credentialType`).
Cross-DB logical references (no FK, different database file):
`graphs.ownerId` → `accounts.id`, `graphs.projectId` → project identity
(ADR-042). Consumer enforces referential integrity at application layer.
## Relations ## Relations
### System DB Relations ### System DB Relations
- **organizations → organization_members**: one-to-many - **accounts → organizations**: one-to-many (via `organizations.ownerId`)
- **accounts → organization_members**: one-to-many - **accounts → organization_members**: one-to-many (via `organization_members.accountId`)
- **accounts → api_keys**: one-to-many (via `api_keys.ownerId`)
- **accounts → peer_credentials**: one-to-many (via `peer_credentials.ownerId`)
- **accounts → audit_logs**: one-to-many (via `audit_logs.ownerId`)
- **organizations → organization_members**: one-to-many (via `organization_members.orgId`)
### Tenant DB Relations ### Tenant DB Relations
@@ -301,7 +501,7 @@ implement keypal's `Storage` interface.
### `createSystemDatabase(client)` ### `createSystemDatabase(client)`
Creates a Drizzle database instance with the identity schema (accounts, Creates a Drizzle database instance with the identity schema (accounts,
organizations, organization_members, api_keys, audit_logs) attached. organizations, organization_members, api_keys, peer_credentials, audit_logs) attached.
```ts ```ts
import { createSystemDatabase } from "@alkdev/storage/sqlite"; import { createSystemDatabase } from "@alkdev/storage/sqlite";
@@ -346,7 +546,9 @@ db.transaction((tx) => {
| [038](decisions/038-sqlite-first-pg-removed.md) | SQLite-first, PG removed | Single database host | | [038](decisions/038-sqlite-first-pg-removed.md) | SQLite-first, PG removed | Single database host |
| [039](decisions/039-honker-as-sqlite-extension.md) | Honker as SQLite extension | DB + pub/sub + queues in one file | | [039](decisions/039-honker-as-sqlite-extension.md) | Honker as SQLite extension | DB + pub/sub + queues in one file |
| [040](decisions/040-system-db-tenant-db.md) | System DB + tenant DB | Identity in system.db, graphs in tenant-{orgId}.db | | [040](decisions/040-system-db-tenant-db.md) | System DB + tenant DB | Identity in system.db, graphs in tenant-{orgId}.db |
| [041](decisions/041-identity-tables-in-storage.md) | Identity tables in storage | accounts, organizations, api_keys, audit_logs | | [041](decisions/041-identity-tables-in-storage.md) | Identity tables in storage | accounts, organizations, api_keys, peer_credentials, audit_logs |
| [049](decisions/049-identity-schema-restructuring.md) | Identity schema restructuring | Separate credential tables, remove Gitea, data→metadata, FK cascades |
| [050](decisions/050-sha256-for-api-key-hashing.md) | SHA-256 for API keys | Fast hash for high-entropy machine keys, not slow KDF |
| [042](decisions/042-scoping-columns-on-graphs.md) | Scoping columns on graphs | `ownerId`, `projectId` on `graphs` table | | [042](decisions/042-scoping-columns-on-graphs.md) | Scoping columns on graphs | `ownerId`, `projectId` on `graphs` table |
| [043](decisions/043-graph-type-scope.md) | Graph type scope | `system` / `tenant` / `user` scope on `graph_types` | | [043](decisions/043-graph-type-scope.md) | Graph type scope | `system` / `tenant` / `user` scope on `graph_types` |
| [044](decisions/044-drizzle-honker-adapter.md) | Drizzle-Honker adapter | ~100-line session adapter, POC validated | | [044](decisions/044-drizzle-honker-adapter.md) | Drizzle-Honker adapter | ~100-line session adapter, POC validated |