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Let the agents AppRole mint unkin-agent Gitea tokens (#114)
Why: AI coding agents authenticate to Gitea as Ben using Ben's token. With the unkin-agent identity now in place (terraform-git PR #59), the agents AppRole should issue that account's tokens directly so agent commits and PRs are attributable and carry only least-privilege scopes.

How:
- add a gitea secrets-engine role minting ephemeral tokens for unkin-agent scoped to write:repository, write:issue, read:user — push branches and open PRs, never merge or administer
- add a policy granting read on gitea/creds/unkin-agent, bound to the agents AppRole, mirroring the agent-* Kubernetes creds bindings

Depends on terraform-git PR #59: the unkin-agent Gitea account must exist before minted tokens work. The vault-plugin-secrets-gitea engine is already live (plugin v0.1.0 registered, gitea mount configured), so no engine/plugin change is needed here.

Reviewed-on: #114
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>
2026-08-08 23:41:53 +10:00

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YAML

# Role minting ephemeral tokens for the unkin-agent bot user -- the shared
# identity Ben's AI coding agents use to submit work. The agent clones/pushes
# code and opens pull requests, so it gets write on repositories (clone + push +
# PR create) and write on issues (PR/issue comments). Read is implied by write.
# No admin/org/user-write scopes, so it can never merge via API privilege; merge
# is blocked separately by branch protection (merge whitelist = Owners).
# read:user is required because tea (and most API clients) validate the login
# via GET /api/v1/user, which 403s without it.
# Reading gitea/creds/unkin-agent mints a lease-bound token deleted from Gitea
# on revoke/expiry. Consumed by the "agents" AppRole (see
# policies/gitea/creds/unkin-agent.yaml).
---
username: unkin-agent
scopes:
- write:repository
- write:issue
- read:user
token_name_prefix: vault-unkin-agent
ttl: 3600 # 1h
max_ttl: 14400 # 4h