key-cape/workplans/KEY-WP-0038-forgejo-oidc-client.md

---
id: KEY-WP-0038
type: workplan
title: "Forgejo as a NetKingdom OIDC client, so the forge can close"
domain: infotech
repo: key-cape
status: active
flavor: implementation
owner: claude-code
topic_slug: railiance
created: "2026-10-08"
updated: "2026-10-08"
depends_on: []
related_repos:
  - prj-forgejo-org-refactor
  - railiance-apps
  - railiance-platform
state_hub_workstream_id: "098e3e2c-a138-560e-b2d3-3a15eb49d8a9"
---

# KEY-WP-0038 - Forgejo as a NetKingdom OIDC client, so the forge can close

## Why

`forgejo.coulomb.social` is closing: private by default, no anonymous access
(prj-forgejo-org-refactor ORGREF-WP-0002, decision
`decisions/forge-visibility-policy.md`). The founder's condition is that Forgejo
sign-in runs through NetKingdom **before** anything closes, so that every human,
agent and service reader has a governed identity rather than an ad-hoc local
account. This plan is ORGREF-WP-0002-T04. Its Forgejo-side counterpart is
railiance-apps `RAPPS-WP-0016` (ORGREF-WP-0002-T05), which owns the Forgejo
Helm release.

## Boundaries

- Registration follows the existing human browser-client pattern
  (`docs/approval-engine-provisioning-request.yaml`, `human_registration`) and the
  client fields validated in KEY-WP-0028. Redirect URIs are exact, never
  wildcards.
- The client secret goes to OpenBao through railiance-platform custody. No secret
  value in git, State Hub, logs or chat.
- Founder guardrail for the whole closure: tighten gradually, never lock anyone
  out, never risk assets. Nothing in this plan changes who can read the forge
  today. It only makes the NetKingdom path available.

## Tasks

```task
id: KEY-WP-0038-T01
status: done
priority: high
state_hub_task_id: "5f019d13-1fa3-5b88-a27a-75a3339ca96e"
```

### T01 — Define what Forgejo receives

Write the claim contract Forgejo consumes, as a non-secret request packet under
`docs/`:

- issuer `https://kc.coulomb.social`; confidential client `forgejo`; authorization
  code with PKCE; scopes `openid profile email groups`
- redirect URI
  `https://forgejo.coulomb.social/user/oauth2/netkingdom/callback`. The
  authentication-source name `netkingdom` must match railiance-apps'
  configuration exactly.
- subject and username: canonical directory subject, plus a stable
  `preferred_username` that Forgejo can match to the existing local accounts
  (founder and agent accounts) for linking
- `groups` naming the Forgejo organisations and teams to map to (for example
  `forge:coulomb:owners`, `forge:coulomb:readers`), and `principal_type` so that
  human and service principals stay distinguishable
- MFA: forge administrators and owners require assurance with a fresh second
  factor; plain readers follow the client-aware MFA policy (KEY-WP-0008)

Acceptance: the founder accepts the packet. The group names are agreed with
railiance-apps.

2026-10-08: packet drafted at `docs/forgejo-oidc-client-request.yaml`. It covers a
confidential client `forgejo` with PKCE and `mfaRequired: true`, the exact
callback, scopes, a custody path, the claims as emitted at this revision, new
LLDAP groups `forge-admins`, `forge-coulomb-owners` and `forge-coulomb-readers`
with a required-claim gate, no automatic account creation, and linking of local
accounts. It also proposes that agents and services use scoped tokens bound to
service identities, not browser sign-in.

2026-10-08: accepted by the founder (in session). railiance-apps' RAPPS-WP-0016
uses the same authentication-source name `netkingdom` and the same group names,
so the agreement condition holds. Before T02, the LLDAP groups `forge-admins`,
`forge-coulomb-owners` and `forge-coulomb-readers` must exist, with the founder
in the first two.

```task
id: KEY-WP-0038-T02
status: wait
depends_on: [KEY-WP-0038-T01, NK-WP-0048-T06]
blocking_reason: "Registration runs as the first KnownSecurityCase of type oidc-browser-relying-party (NK-WP-0048-T06), not as a hand-built rollout."
priority: high
state_hub_task_id: "ddcfb482-8f33-5c81-9ce8-84be8fa5dc30"
```

### T02 — Register the client and hand over its secret

**Changed 2026-10-08 (founder direction):** no case-specific helper script.
Registration is the first case of the SecurityCaseType `oidc-browser-relying-party`
(net-kingdom NK-WP-0048, canon `security-case-types_v0.1`). The parameters
accepted in T01 become the case; ops-mason materializes it (MASON-WP-0010) and
ops-warden follows through (WARDEN-WP-0044). key-cape's part is to declare
client registration as a playbook capability that the type composes, and to
review the type's composition.

The original intent below still describes what must result.

Register `forgejo` from the packet. Mint the client secret straight into custody
(proposed OpenBao path `platform/workloads/forgejo/netkingdom-oidc-client`,
custody owner railiance-platform, consumer Forgejo). Record a receipt with no
secret value.

Acceptance: discovery metadata lists the client's redirect URI. The secret is
readable by Forgejo's custody path only.

```task
id: KEY-WP-0038-T03
status: wait
depends_on: [KEY-WP-0038-T02]
blocking_reason: "Claims are verified against the registered client."
priority: high
state_hub_task_id: "40ddaa29-7245-508c-ad48-ddc063e25115"
```

### T03 — Prove the claims for each kind of identity

Before Forgejo uses the client, verify the issued ID token and UserInfo for one
human (the founder, with MFA), one agent identity and one service identity:
subject, `preferred_username`, `groups`, `principal_type`, assurance. Record the
claims, minus tokens, as evidence.

Decide with railiance-apps whether agents and services sign in to Forgejo at
all, or receive scoped Forgejo tokens bound to a NetKingdom service identity
(ORGREF-WP-0002-T06). Record the decision.

Acceptance: evidence for all three principals; the agent and service decision is
recorded. Then hand over to RAPPS-WP-0016.

```task
id: KEY-WP-0038-T04
status: todo
priority: high
```

### T04 — Implement the `keycape-client` entry point

`capabilities/playbooks/key-cape.oidc-client-registration.yaml` (contract PASS,
`maturity: planned`) declares client registration as a playbook capability, so
that the SecurityCaseType `oidc-browser-relying-party` (net-kingdom NK-WP-0048)
can compose it. Implement the entry point it names, `tools/keycape-client/`:

- `keycape-client register --client-file <rendered-client.yaml>` with modes
  `inspect`, `dry-run`, `apply` and `remove`; adds, updates or removes exactly one
  client in the live registry; idempotent; never prints or writes secret values;
  a confidential client's secret is read from its custody reference
- one implementation replacing the per-client helpers in net-kingdom
  `sso-mfa/k8s/keycape/` (register-coulomb-social, portal-client-rollout,
  vergabe-client-rollout, secrets-engine-openbao-client-rollout), keeping their
  safeguards (byte-preserving merge, compare-and-swap, cluster pin, safe receipts)
  and their tests as regression cases
- client field validation by the KEY-WP-0028 rules
- then set the declaration's `maturity` to `implemented`

Longer term, loading clients from a non-secret registry with secrets referenced
from custody would remove the type's only attended step (see the type README,
"Attended steps").