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agent capabilities live in a swarm KV record, set from swarmctl

An agent's capabilities move from the hive's meta repo
(`meta/capabilities.json`, injected as `HIVE_CAPABILITIES`) into the
`capabilities` field of its key in a new `agent-permissions` KV bucket,
which swarm-controller alone writes.

- swarm-queue-client: `agent_permissions` (bucket, key, `AgentPermissions`,
  direct-get read, the import subject and its wire types).
- swarm-controller: creates the bucket at start; `GET|PUT|DELETE
  /api/agents/{name}/permissions` (deny_unknown_fields and unknown
  capability ⇒ 422, duplicate ⇒ 400, agent must be declared by a hive);
  answers each hive's one-shot import, writing a key only where there is
  none and only for agents that hive's wanted state declares.
- swarmctl: `agent permissions get|set|clear`.
- swarm-nats-auth: a hive reads every key of the bucket and sends its
  import on its own subject; the controller subscribes to the imports and
  may answer them (`responses`).
- hive-c0re: reads each of its agents' keys every 30s into
  /var/lib/hyperhive/swarm-agent-permissions.json and restarts an agent,
  gracefully, when its capabilities change. Unset is the compiled-in
  default (ruth: manage_root_agent; everyone else: none). A failed read
  keeps the stored value. On first boot it seeds that file from
  meta/capabilities.json, sends the grants to the controller, and deletes
  the file once the controller answers.

Deleted: the capabilities.json reader/writer, `HIVE_CAPABILITIES` in the
rendered meta flake, ruth's capability seed, the capabilities half of the
permissions rebuild job (`PermPayload::Capabilities`/`Combined`), the
dashboard's capabilities table and `capabilities_changed` event, and the
now-unused `Capability::description`.

Part of #5170.
This commit is contained in:
atlas 2026-10-15 00:24:41 +02:00 • committed by mara
commit f862354e43
47 changed files with 1943 additions and 1146 deletions

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@ -253,8 +253,9 @@ the operator review and merge it. By design, no second, mount-shaped
path reaches the same file without the review.
Agents holding the `manage_root_agent` capability (granted per agent in
`capabilities.json`; see `hive-sh4re/src/permissions.rs`) get additional
host-side bind mounts via `set_nspawn_flags`:
the swarm's `agent-permissions` record; see
`docs/process/conventions.md#capabilities`) get additional host-side bind
mounts via `set_nspawn_flags`:
- `/var/lib/hyperhive/agents/` → `/agents/` (RW) — **every** agent's
proposed repo, not just direct children. The capability means "may
@ -267,16 +268,13 @@ host-side bind mounts via `set_nspawn_flags`:
An agent without the capability only has its direct children's config
dirs.
⚠️ nspawn bakes bind flags at container start, so granting or
revoking this capability doesn't change any mount until that agent's
container is rebuilt/restarted.
⚠️ nspawn bakes bind flags at container start, so hive-c0re restarts
an agent, after its current turn, when its capabilities change.
The root agent gets the capability by default, seeded on its autodeploy
path (`workers::auto_update::ensure_root_agent`) so the recovery mounts
are there from its first container. That seed only fires while
`capabilities.json` doesn't exist yet: any grant or revoke through
the dashboard creates the file, so a revoked root-agent grant stays
revoked and isn't re-applied on the next hive-c0re restart.
The root agent holds the capability by default: an agent whose record
leaves `capabilities` unset gets the hive's default, which is
`manage_root_agent` for `ruth` and nothing for every other agent.
Setting `"capabilities": []` for her revokes it.
Each proposed repo (`/agents/<n>/config/`) is pre-configured
with `applied` as a git remote pointing at

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@ -391,10 +391,6 @@ Contents:
(`{ "alice": ["messaging", "inbox", "execution"] }`). Written by
`tool_groups::set_groups`; injected as `HIVE_TOOL_GROUPS` env
var into each agent's container.
- `capabilities.json` — per-agent capability grants
(`{ "ruth": ["manage_root_agent"] }`). Written by
`capabilities::set_caps`; injected as `HIVE_CAPABILITIES` env
var. Absent agents have no extra capabilities.
- `swarm-resource-limits.json` — the caps the swarm sets for this
hive's agents
(`{ "sock": { "cpu_quota": "400%", "memory_max": "8G" } }`).
@ -418,6 +414,13 @@ Contents:
The root agent has the meta dir RO-mounted at `/meta/`.
Outside the meta repo, `/var/lib/hyperhive/swarm-agent-permissions.json`
holds the capabilities the swarm grants this hive's agents, as
`workers::swarm_permissions` last read them from the swarm's
`agent-permissions` bucket (every 30 seconds): a copy, not the
record, which `swarmctl agent permissions` sets. `set_nspawn_flags`
reads it at every container start.
hive-c0re renders containers onto `meta#<n>` at creation.
## Destroy vs purge

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@ -334,35 +334,37 @@ that allows the underlying resource access.
| Capability | Effect |
|---|---|
| `manage_root_agent` | may manage *any* agent: bind-mounts every agent's state (rw) + config (ro) into the holder's container, plus `/applied` and `/meta` (ro). Takes effect on the holder's next container rebuild/restart |
| `manage_root_agent` | may manage *any* agent: bind-mounts every agent's state (rw) + config (ro) into the holder's container, plus `/applied` and `/meta` (ro). Takes effect when the holder's container restarts, which hive-c0re does itself on a change |
**Config storage** — per-agent capabilities live in
`/var/lib/hyperhive/meta/capabilities.json` alongside `tool-groups.json`.
Format: `{ "ruth": ["manage_root_agent"] }`.
An absent entry means "no extra capabilities." `render_flake` in `meta.rs`
reads this file and injects `HIVE_CAPABILITIES` (comma-separated
`snake_case` names) into each agent's systemd service env; absent entries emit
no env var so agents without capabilities don't trigger a spurious rebuild.
**Where they live** — in the swarm, not on the hive: the `capabilities` field
of the agent's key in the `agent-permissions` KV bucket
(`swarm-queue-client/src/agent_permissions.rs`), which swarm-controller alone
writes. Set them with `swarmctl agent permissions get|set|clear <agent>`
(`/api/agents/{name}/permissions`). Unset means the hive's default, which is a
constant in hive-c0re (`capabilities::default_for`): none, except `ruth`, who
gets `manage_root_agent`. `"capabilities": []` grants none.
**Setting capabilities** — the operator sets capabilities via the
C4P4B1L1T13S section in the dashboard's P3RM1SS10NS tab.
`hive-c0re::capabilities::set_caps(name, caps)` is the write path.
After a change `meta::sync_agents` commits the updated file; the next agent
rebuild picks up the new `HIVE_CAPABILITIES` env var.
**How a change applies** — every 30 seconds hive-c0re reads the key of each
agent it runs (`workers/swarm_permissions.rs`) and stores the result in
`/var/lib/hyperhive/swarm-agent-permissions.json`, outside the meta repo. nspawn
fixes the bind mounts at container start, so when an agent's capabilities
change hive-c0re restarts it after its current turn. A failed read keeps the
last stored value; it never falls back to the default.
**Runtime resolution** — at session start the harness reads `HIVE_CAPABILITIES`
and resolves each token to a `Capability` variant, logging and skipping
unrecognised ones. An absent or empty var means no extra capabilities.
**Moving off `meta/capabilities.json`** — on its first boot with this code a
hive copies the file's grants into the stored value, sends them to
swarm-controller once (written only for agents with no key, and only for
agents that hive's wanted state declares), and deletes the file from the meta
repo when the controller answers (`workers/permissions_import.rs`).
**Capability NOT configurable from `agent.nix`** — same reasoning as tool
groups: an agent that could grant its own capabilities via a config commit would
bypass the operator approval gate.
**Adding a new capability** — add a variant to `Capability` in
`hive-sh4re/src/permissions.rs` + an arm to `as_str`. Add it to `Capability::ALL`
(the source of truth for the permissions UI columns). Implement the access
check in the relevant handler (`hive-c0re/src/socket_server/mod.rs`,
`coordinator.rs`, or a handler under `hive-c0re/src/dashboard/`).
`hive-sh4re/src/permissions.rs` and to `Capability::ALL`. Implement the access
check where hive-c0re enforces it (today: `set_nspawn_flags` in
`hive-c0re/src/lifecycle/host_config.rs`).
## Async forms

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@ -73,7 +73,7 @@ Cheap — no build slot:
| `SetWanted` | write the durable power intent (`wanted = Up`/`Offline`) as the head node of a power-op DAG. Takes the agent lease even though it's a store write, so the intent write and the tail `Reconcile` are atomic per-agent — two racing power ops can't clobber each other's intent before either reconciles |
| `EmitRebuilt` | tail of a rebuild/perm-change — emit the agent's `Rebuilt` manager event (ok/fail per outcome, nothing on cancel). One node per agent _and_ per outcome |
| `WriteDropin` | `set_nspawn_flags` + `set_resource_limits` + daemon-reload |
| `WritePermFile` | commit `tool-groups.json` / `capabilities.json` (single git commit under `META_LOCK`) + emit the P3RM1SS10NS snapshots |
| `WritePermFile` | commit `tool-groups.json` (single git commit under `META_LOCK`) + emit the P3RM1SS10NS snapshot |
| `ForgeSweep` | one-shot boot-time forge user/token sweep for every container (`forge::ensure_all`) as a first-class node, so it shows as real work on the dashboard instead of running invisibly in a bare `tokio::spawn`. Agentless |
| `MatrixSweep` | matrix user/space sweep (`matrix::ensure_all`): the boot-time instance, plus one every 30 min from a loop in `main.rs`. Holds `Resource::MatrixSweep` (capacity 1), so two passes never overlap; each tick queues its own pass, which waits for the resource if one is already live. Agentless |
| `KnowledgePull` | `/knowledge` pull (`knowledge::pull`): at boot (commits that landed while `hive-c0re` was down), on the swarm knowledge-changed event, and hourly as a fallback. Holds `Resource::KnowledgeTree` (capacity 1), so two pulls never overlap on the working tree; each trigger queues its own pass, which waits for the resource if one is already live. Agentless |

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@ -12,6 +12,10 @@ This document contains the help content for the `swarmctl` command-line program.
* [`swarmctl agent inference get`↴](#swarmctl-agent-inference-get)
* [`swarmctl agent inference set`↴](#swarmctl-agent-inference-set)
* [`swarmctl agent inference clear`↴](#swarmctl-agent-inference-clear)
* [`swarmctl agent permissions`↴](#swarmctl-agent-permissions)
* [`swarmctl agent permissions get`↴](#swarmctl-agent-permissions-get)
* [`swarmctl agent permissions set`↴](#swarmctl-agent-permissions-set)
* [`swarmctl agent permissions clear`↴](#swarmctl-agent-permissions-clear)
* [`swarmctl schedule`↴](#swarmctl-schedule)
* [`swarmctl schedule add`↴](#swarmctl-schedule-add)
* [`swarmctl schedule list`↴](#swarmctl-schedule-list)
@ -66,6 +70,7 @@ Manage agents across the swarm
* `create` — Queue creation of a new agent on a hive in this swarm
* `mint-forge-token` — Check one agent's forge token, and mint it if it's missing or stale
* `inference` — Show the model, effort, subagent models and subagent cap the swarm sets for an agent, or change the model, effort and subagent models
* `permissions` — Show or change the capabilities the swarm grants an agent
@ -198,6 +203,77 @@ Clear every field for an agent, so it goes back to its own values
## `swarmctl agent permissions`
Show or change the capabilities the swarm grants an agent.
The hive running the agent reads them every 30 seconds and, when they change, restarts the agent after its current turn. Unset leaves the agent on its hive's default: none, except `ruth`, who gets `manage_root_agent`.
**Usage:** `swarmctl agent permissions <COMMAND>`
###### **Subcommands:**
* `get` — Show the capabilities the swarm grants an agent, or that it sets none
* `set` — Replace the capabilities the swarm grants an agent
* `clear` — Clear the agent's permissions, so its hive's default applies again
## `swarmctl agent permissions get`
Show the capabilities the swarm grants an agent, or that it sets none
**Usage:** `swarmctl agent permissions get [OPTIONS] <AGENT>`
###### **Arguments:**
* `<AGENT>` — Agent name
###### **Options:**
* `--controller-socket <PATH>` — swarm-controller's unix socket.
Supplied by the nix module that installs this binary, from the same `socketPath` option the daemon binds; falls back to `SWARM_CONTROLLER_SOCKET`.
## `swarmctl agent permissions set`
Replace the capabilities the swarm grants an agent
**Usage:** `swarmctl agent permissions set [OPTIONS] --capabilities <CAPABILITIES> <AGENT>`
###### **Arguments:**
* `<AGENT>` — Agent name. A hive must declare it
###### **Options:**
* `--capabilities <CAPABILITIES>` — The capabilities to grant, comma-separated (`manage_root_agent`). `--capabilities ''` grants none
* `--controller-socket <PATH>` — swarm-controller's unix socket.
Supplied by the nix module that installs this binary, from the same `socketPath` option the daemon binds; falls back to `SWARM_CONTROLLER_SOCKET`.
## `swarmctl agent permissions clear`
Clear the agent's permissions, so its hive's default applies again
**Usage:** `swarmctl agent permissions clear [OPTIONS] <AGENT>`
###### **Arguments:**
* `<AGENT>` — Agent name
###### **Options:**
* `--controller-socket <PATH>` — swarm-controller's unix socket.
Supplied by the nix module that installs this binary, from the same `socketPath` option the daemon binds; falls back to `SWARM_CONTROLLER_SOCKET`.
## `swarmctl schedule`
Manage scheduled prompts.

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@ -77,8 +77,8 @@ H0M3 hub (served at
`/core.html`), with minimal chrome: a `← home` back-link and a single pane,
**K3PT ST4T3**. The page is its own esbuild bundle (`core.js`) that
cold-loads `/api/state` and subscribes to `/api/dashboard/stream` for
`tombstones_changed`, `capabilities_changed`, and `tool_groups_changed`
(the latter two re-render the stale-perms sub-section when permission
`tombstones_changed` and `tool_groups_changed`
(the latter re-renders the stale-perms sub-section when permission
data changes). (Rebuild queue and meta inputs are dashboard tabs — see
below.)
@ -104,11 +104,10 @@ container is all hive-c0re can actually prove. Fixing it properly
needs a recorded destroy — **deferred** to the swarm-controller /
snapshot-storage rework where the problem changes shape.
*Stale permission entries*: agents with explicit capability or
tool-group JSON entries but no live container — typically renamed or
deleted agents whose entries persisted in `capabilities.json` /
`tool-groups.json`. Loaded when the page opens;
autorefreshes on `capabilities_changed` + `tool_groups_changed` SSE
*Stale permission entries*: agents with explicit tool-group JSON
entries but no live container — typically renamed or deleted agents
whose entries persisted in `tool-groups.json`. Loaded when the page opens;
autorefreshes on `tool_groups_changed` SSE
events. Each ghost agent gets a `✕ clear perms` button
(`DELETE /api/permissions/{name}`).
@ -230,11 +229,13 @@ entry with that id pre-expanded.
## P3RM1SS10NS tab
Per-agent permission configuration. Two sections, each rendered as a
column-driven checkbox matrix: rows are agents, columns are the
permission names fetched from hive-c0re. The column list is
authoritative — adding a new tool-group or capability to hive-c0re
requires no UI change; the new column appears automatically.
Per-agent tool-group configuration, rendered as a column-driven
checkbox matrix: rows are agents, columns are the group names fetched
from hive-c0re. The column list is authoritative — adding a new
tool-group to hive-c0re requires no UI change; the new column appears
automatically. Capabilities aren't set here: they're the swarm's,
set with `swarmctl agent permissions` (see
`docs/process/conventions.md#capabilities`).
The snapshot carries `agents` (the full manageable roster — live
containers ∪ agents with an explicit entry) and `effective` (per-agent
@ -248,29 +249,11 @@ strip those defaults. The `(default)` badge keys off absence from
Fetches fire on tab activation (not page-load) to avoid unnecessary
work when the operator never visits this tab. Live mutations from the
rebuild-queue worker are also pushed via the `capabilities_changed` /
`tool_groups_changed` SSE events (same payload shape as the GET
endpoints), so an open P3RM1SS10NS tab reflects worker-applied changes
rebuild-queue worker are also pushed via the `tool_groups_changed`
SSE event (same payload shape as the GET endpoint), so an open P3RM1SS10NS tab reflects worker-applied changes
without requiring navigation. Tab-activation re-fetches remain as a
safety net for reconnect windows.
**C4P4B1L1T13S** — per-agent capability grants. Capabilities unlock
gated MCP tools and system-level access beyond the default agent
surface. A saving POST queues a rebuild for the affected agent so the
new `HIVE_CAPABILITIES` env var takes effect in the next session.
The current capabilities are:
| Name | Effect |
|------|--------|
| `manage_root_agent` | mounts every agent's state (rw) + config (ro) into this agent's container so it can manage/recover any agent |
Each row is one agent. Columns are the capability names returned by
`GET /api/capabilities` as `caps: Vec<String>`. Checking or unchecking
boxes only stages the change in-browser; the browser writes nothing until
the operator selects the page-level **save all** button (described below). Row
values follow the `effective`/`assignments` rule described above.
<!-- vale write-good.Passive = NO -->
**T00L GR0UPS** — per-agent tool-group permissions. Tool groups are
named buckets of MCP tools; each agent starts with a role default
@ -291,10 +274,9 @@ The current tool groups are: `messaging`, `meta`, `inbox`, `lifecycle`,
Claude's built-in `WebFetch` and `WebSearch` to `--tools` /
`--allowedTools` for that agent session.
Both tables share the same visual shape: `.cap-table-wrap` /
`.tg-table-wrap` outer scroll container, `thead` with a label column
(`.cap-agent-col` / `.tg-agent-col`) + one column per permission
(`.cap-col` / `.tg-group-col`). Each tbody row is one agent: a name cell
The table's shape: a `.tg-table-wrap` outer scroll container, `thead`
with a label column (`.tg-agent-col`) + one column per group
(`.tg-group-col`). Each tbody row is one agent: a name cell
and its checkbox cells, where each checkbox carries `data-baseline` (its
render-time state) and the row carries `data-agent` for dirty-tracking.
@ -302,18 +284,15 @@ render-time state) and the row carries `data-agent` for dirty-tracking.
buttons exist. A single page-level `.perm-save-bar` with a **save all (N
agents)** button sits at the bottom of the pane, enabled only when some
checkbox diverges from its baseline. Selecting it diffs every checkbox
across *both* matrices and POSTs one batch to `POST /api/permissions` as
`{ changes: [ { agent, tool_groups?, capabilities? } ] }` — the batch
includes only the perm-types that actually changed for each agent (an
omitted field leaves that file untouched; an included array fully
replaces it).
hive-c0re coalesces an agent's capabilities + tool-groups into a
single rebuild, so changing both for one agent is one rebuild, not two.
and POSTs one batch to `POST /api/permissions` as
`{ changes: [ { agent, tool_groups } ] }` — the batch includes only the
agents whose groups changed (an included array fully replaces the
agent's groups).
The batch is atomic: it validates every change first and on any error
rejects the whole POST (`{error}`, nothing applied); a clean 200 (`ok`)
flips the bar to a queued→rebuilding state and re-fetches both tables.
Live `capabilities_changed` / `tool_groups_changed` events re-render the
matrices unless the section has unsaved edits, so an in-progress edit set
flips the bar to a queued→rebuilding state and re-fetches the table.
Live `tool_groups_changed` events re-render the
matrix unless it has unsaved edits, so an in-progress edit set
isn't clobbered.
## ST4TS page (`/stats.html`)
@ -767,31 +746,16 @@ below — some endpoints aren't in it yet.
`/var/lib/hyperhive/meta/tool-groups.json` and queues a rebuild so
`HIVE_TOOL_GROUPS` takes effect. Agent name validated;
`guard_agent_name` applied.
- `GET /api/capabilities` — returns `{ caps: Vec<String>,
assignments: BTreeMap<String, Vec<String>>,
descriptions: BTreeMap<String, String> }`. `caps` is the
ordered list of all known capability names; `assignments` is the
per-agent grant map (absent agents have no extra capabilities);
`descriptions` maps each capability name to a short human-readable
string surfaced as a column-header tooltip on hover.
- `POST /api/capabilities/{agent}` — body `{ caps: ["name", …] }`.
Writes the capability set for `{agent}` to
`/var/lib/hyperhive/meta/capabilities.json` and queues a rebuild so
`HIVE_CAPABILITIES` takes effect. Agent name validated;
unknown capability strings rejected (400). `guard_agent_name`
applied.
- `POST /api/permissions` — batch perm apply for the save-all
permissions button. Body
`{ changes: [{ agent, tool_groups?: ["name", …], capabilities?: ["name", …] }] }`.
Sparse per agent: an omitted field leaves that perm-type untouched,
an empty array clears it, a populated array fully replaces it (same
replace semantics as the per-agent endpoints above). Each affected
agent gets ONE combined `PermChange` queue entry, so changing both
an agent's tool-groups and capabilities triggers a single rebuild,
not two. **Atomic**: the endpoint validates every change first (agent names via
`guard_agent_name`, group + capability names) and on any validation
error writes or enqueues nothing (non-2xx `{ error }`); it skips
rows with both fields omitted rather than erroring on them.
`{ changes: [{ agent, tool_groups?: ["name", …] }] }`.
An omitted `tool_groups` leaves the agent untouched, an empty array
clears it, a populated array fully replaces it (same replace
semantics as the per-agent endpoint above). Each affected agent gets
one `PermChange` queue entry. **Atomic**: the endpoint validates every
change first (agent names via `guard_agent_name`, group names) and on
any validation error writes or enqueues nothing (non-2xx `{ error }`);
it skips rows with the field omitted rather than erroring on them.
Returns `200 "ok"` on
success.
- `POST /api/meta-update` — `nix flake update` the selected
@ -841,13 +805,6 @@ payload):
operator cancel / retry (`/api/system/reminders/*`), `cancel_loose_end`
with Reminder kind, and the scheduler tick after each delivery
batch (`reminder_scheduler`).
- `capabilities_changed` (seq, caps: `Vec<str>`, descriptions: map,
assignments: `BTreeMap<String, Vec<String>>`) — full snapshot of
capability grants. Emitted from the rebuild-queue worker after a
`PermChange` / Capabilities entry commits the JSON file. Payload
matches `GET /api/capabilities` shape so the client can call
`renderCapabilities` directly. P3RM1SS10NS tab subscribes; activation
re-fetch still runs as a safety net.
- `tool_groups_changed` (seq, groups: `Vec<str>`, descriptions: map,
assignments: `BTreeMap<String, Vec<String>>`) — full snapshot of
tool-group assignments. Emitted from the rebuild-queue worker after