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github: PATs live in swarm bao; the agent fetches them itself

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An operator links an agent's GitHub personal access token in the swarm UI
(LinkGithubAccountForm, "link github account" on /agents). swarm-controller's
PUT /api/hives/{hive}/agents/{agent}/github-account stores it at
swarm/agents/<agent>/github-token (swarm_secret_client::github), a flat leaf
under the agent's prefix that the agent's existing read grant already covers:
no policy change, and no list grant, since there is one token per agent.

In the agent, hive-agent-github-token (oneshot + 2-minute timer, as the agent
user, under its own store certificate, ordered before hive-github-notify)
reads that path and writes <state>/github-token, 0600 and agent-owned, the
file the gh wrapper, git credential helper and hive-github-notify already
read. It replaces the file by rename only when the bytes changed and never
deletes it: a hive-written github-token stays until a token is linked in the
swarm UI. It is installed only with a store address and
services.hyperhive.agent.github.enable.

Removed: the dashboard's CR3D3NTIALS page (credentials.html/js/css, its
build entries and H0M3 tile; GITHUB was its only tab), hive-c0re's
dashboard/matrix_accounts.rs with GET/POST /api/github-account,
priv_client::write_agent_github_token, the host socket's
SetAgentGithubToken and `hivectl github set-token`, and hive-priv's
WriteAgentGithubToken with write_agent_state_file, its only caller gone.

Docs: integrations/github.md and swarm/ui.md describe the swarm path,
swarm/credentials.md gains the store-path row, and the hive UI docs,
hivectl docs and security.md's hive-priv table drop the removed pieces.

Closes #4347
This commit is contained in:
atlas 2026-10-02 17:48:27 +02:00
commit 8e23feb01b
41 changed files with 804 additions and 846 deletions
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docs/trust-boundary/security.md
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@ -295,7 +295,6 @@ known operations; there is no arbitrary command pass-through:
| `ControlInfraContainer` | `systemctl <action> container@<container>.service` — the `InfraContainer` enum is the allowlist, and serde rejects unknown names at the wire boundary (`hive-c0re` has no variant, so no request can name it) |
| `SyncAgentTmpfiles` | unlink `/etc/tmpfiles.d/hyperhive-agents.conf` and return `Ok` |
| `SetAgentPaused` | create / remove the `<state>/<name>/harness/paused` marker that parks an agent's turn loop |
| `WriteAgentGithubToken` | write `0600` `github-token` into agent state dir |
| `RegisterCiRunner` | write `/run/hive-ci/runner-token` (host path, root-owned) then `systemctl --machine=hive-ci restart gitea-runner-hive.service`. Only the registration token crosses; the forge admin token never enters the container |
| `EnsureAgentSubvolume` | `btrfs subvolume create <state>/<name>` for a new agent — no-op when the path exists or the filesystem isn't btrfs |
| `UpgradeAgentSubvolume` | migrate an existing plain state dir into a subvolume: create, `cp -a --reflink=auto`, atomic swap. Operator opt-in, and the caller stops the agent first |