# State Hub Forge Derivation Read Token

Date: 2026-08-26 (proposed)
Catalog: `state-hub-forge-derivation-read` (status `draft` until built)
Owner: `ops-mason` (built under `ops-mason/plans/state-hub-forge-derivation-read.md`, approved 2026-08-26)

Read-only Forgejo token so the State Hub can clone **private** repositories and
derive their work records. `CUST-ADR-012` makes the forge the projection source;
that premise held only for repositories central could read, and nine private
repositories were invisible to derivation entirely (`STATE-WP-0083-T04`,
2026-08-26).

**This lane is a pointer.** ops-warden routes it and executes nothing: it issues
SSH certificates only and owns no secret store. The AppRole, policy, and KV path
are ops-mason's build; the token value is minted by the forge owner and
delivered through `paste_once_provision`.

**Ask first:** `warden plan "state hub read private repository" --json`.

---

## OpenBao pointers

| Field | Value |
| --- | --- |
| Mount | `platform` |
| Path | `platform/workloads/state-hub/forge-derivation` |
| Secret field | `FORGE_READ_TOKEN` |
| Policy | `workload-kv-read-state-hub-forge-derivation` (read on that path alone) |
| AppRole | `state-hub-forge-derivation` (`token_ttl=15m`, `token_max_ttl=30m`) |

**Forgejo token scope:** repository **read**, organisation-wide. No push, no
administration, no other Forgejo resource. Approved at that breadth on
2026-08-26 — the maintenance cost of per-repository grants lands on whoever adds
a private repository later, and the leak radius (every private repository,
read-only) was accepted knowingly. Reasoning in the construction plan §6.

**Not the admin PAT.** `forgejo-admin-api-token` is a site-admin credential
owned by `railiance-platform`. Reusing it here was considered and rejected: a
projection that only reads must not hold an identity that can write.

---

## Worker checklist

1. **Plan** (agents — always):

   ```bash
   warden plan "state hub read private repository" --json
   # expect lane=state-hub-forge-derivation-read
   ```

2. **In-cluster consumers do nothing here.** The `state-hub` deployment receives
   the credential as a Kubernetes Secret; `derive_from_forge()` picks it up on
   its own. If derivation reports a repository as unreadable, the lane is the
   thing to check — not the repository.

3. **Never put the token in a clone URL.** Embedded userinfo lands in logs and
   process listings. Use a credential helper or an HTTP header.

4. **Reading the value directly** (operators, rare — verification only):

   ```bash
   bao kv get -field=FORGE_READ_TOKEN platform/workloads/state-hub/forge-derivation
   ```

---

## Verify the lane (capabilities-safe — never read the value)

```bash
# Positive: the AppRole identity can read the data path
bao token capabilities <approle-token> platform/data/workloads/state-hub/forge-derivation
#   → expect: read

# Negative: it can read nothing else, including the admin lane
bao token capabilities <approle-token> platform/data/workloads/forgejo/forgejo-admin
#   → expect: deny
```

The negative check is the one that matters. The whole argument for building this
lane instead of reusing `forgejo-admin-api-token` is that it cannot do what that
one can.

---

## Rotation

Re-mint in Forgejo, then overwrite the KV field. Rotation must not require a
chart change or a redeploy — if it does, the delivery in
`STATE-WP-0084-T02` is wrong and should be fixed rather than worked around.

1. Mint a replacement read-only token in Forgejo (same scope: repository read,
   organisation-wide).
2. Deliver it to `platform/workloads/state-hub/forge-derivation`, field
   `FORGE_READ_TOKEN`, via `paste_once_provision`.
3. Revoke the previous token in Forgejo.
4. Confirm a derivation pass still reads a known private repository.

---

## See also

- `ops-mason/plans/state-hub-forge-derivation-read.md` — the construction plan
- `ops-mason/workplans/MASON-WP-0003-state-hub-forge-read-lane.md` — the build
- `state-hub/workplans/STATE-WP-0084-forge-read-for-private-repositories.md` — the consumer
- `wiki/playbooks/forgejo-admin-api-token.md` — the lane this one is deliberately not