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feat(#2453): remove DAG parent_id now that every op is one DAG

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With the meta-update cascade (#2476) and startup sweep (#2450) folded
into single DAGs that grow per-agent subgraphs via append_subgraph,
nothing links parent/child DAGs anymore — parent_id is dead.

hive-c0re: drop parent_id from Dag/DagSpec (+ the DagView copy); delete
append_children and cancel_children (no callers); simplify trim_history
(no more terminal-parent-with-live-children guard — a one-big-DAG is
terminal only when its whole graph settles); drop the rebuild() parent_id
param; QueueDag returns just the polled DAG (no fan-out children to
gather). hive-sh4re: drop the DagView.parent_id wire field.

frontend: a multi-step op is one DAG now, so renderRebuildQueue drops the
childrenOf/orphans cross-DAG grouping and renders each entry flat; its
per-agent subgraphs render as nodes within the one row (split by deps).
Removed the dead rqe-child style + isChild plumbing.

Docs + the child-DAG queue tests updated/removed to match.
This commit is contained in:
atlas 2026-07-15 19:50:04 +02:00
commit edf9fd036e
15 changed files with 40 additions and 337 deletions
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13
hive-c0re/src/job_queue/model.rs
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@ -115,11 +115,10 @@ pub enum NodeKind {
/// deploy stays inside `actions.rs` in v1 — deliberately not
/// modeled as scheduler nodes (see the design doc §9).
ApprovalDeploy,
/// No-op anchor that completes immediately with no work. It exists so a
/// boot's `StartupSweep` + per-agent `Reconcile` child DAGs can hang off
/// one root (`parent_id`) and render as a single boot tree on the
/// dashboard. Holds no lease and no build slot; the child DAGs it anchors
/// still run concurrently — the grouping is a display link, not a dep edge.
/// No-op anchor that completes immediately with no work. Vestigial since
/// the boot sweep became one in-DAG graph (no `boot_root` anchor / child
/// DAGs) — slated for removal with the other `StartupSweep` residuals.
/// Holds no lease and no build slot.
Noop,
/// Write the agent's durable power intent (`wanted = Up` when `up`, else
/// `Offline`) as a first-class DAG node, at the head of a power-op
@ -242,8 +241,6 @@ pub struct DagSpec {
pub source: Source,
/// Free-form "why".
pub reason: String,
/// Cascade grouping (meta-update / sweep children).
pub parent_id: Option<u64>,
/// Fires the approval-resolution hook on DAG terminal.
pub approval_id: Option<i64>,
/// `MetaUpdate`-only: the inputs to bump (also part of the dedup
@ -266,7 +263,6 @@ pub struct Dag {
pub template: Template,
pub source: Source,
pub reason: String,
pub parent_id: Option<u64>,
pub approval_id: Option<i64>,
pub inputs: Vec<String>,
pub perm_payload: Option<PermPayload>,
@ -355,7 +351,6 @@ impl Dag {
kind: self.template,
state: self.rollup(),
source: self.source,
parent_id: self.parent_id,
reason: self.reason.clone(),
enqueued_at: self.created_at,
started_at,