MechaCat02 cb3d458cfd feat(apply): §6 M2 — structural-divergence detection + declarative reparent
With the declared parent on the wire (M1), `apply_tree` now compares each
EXISTING group node's server parent to the manifest's (directory-nesting)
parent and resolves a divergence per a request `StructureMode` (default
`Refuse` — a pre-M2 CLI never reshapes the tree):

- `Refuse` → `ApplyError::StructuralDivergence` (422), naming the flags.
- `ForceLocal` → reparent to the declared parent IN the apply tx via the
  extracted `group_repo::reparent_group_tx` (cycle guard + structure_version
  bump), §5.6-gated (`GroupAdmin` on node + source + destination) and
  attach-ceilinged.
- `AdoptServer` → keep the server shape, reconcile content in place.

M1's `create_missing_groups_tx` generalized to `reconcile_group_structure_tx`
(create + reparent share the coarse-lock / attach-ceiling / RBAC path; both are
recorded `structurally_changed` so the pool-based attach re-check skips their
uncommitted rows). `pic plan` previews the drift (`divergence_preview` → a
`structure` row naming server + manifest parents). CLI:
`--force-local-structure` / `--adopt-server-structure` (mutually exclusive) →
the `structure_mode` wire field; the 422 surfaces verbatim. A concurrent
`pic groups reparent` between plan and apply still trips `StateMoved` (the tree
token already folds structure_version).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-07 20:23:10 +02:00

PiCloud

A lightweight, self-hosted, event-driven serverless compute platform. Upload a Rhai script, get an HTTP endpoint. Designed to run on a single modest server with no idle CPU cost, and to scale out to a small cluster when you need it.

Status: Phase 1 — MVP scaffolding in progress.

The authoritative design lives in serverless_cloud_blueprint.md.

Why

Existing serverless platforms are either cloud-locked, heavyweight, or both. PiCloud aims for the opposite end of the spectrum: one binary, one database, one reverse proxy — running on hardware you already own.

Architecture (one paragraph)

PiCloud splits into three logical services — manager (control plane: scripts, schedules, dashboard), orchestrator (per-node event ingress and dispatch), and executor (per-node Rhai sandbox) — each backed by a *-core Rust library. In MVP they run in a single process; in cluster mode they run as three binaries with one manager and one orchestrator + executor per node. Caddy fronts everything; PostgreSQL is the single source of truth.

See CLAUDE.md for working notes and serverless_cloud_blueprint.md for the full design.

Quick Start

Coming as scaffolding lands. For now:

# Rust toolchain (pinned via rust-toolchain.toml)
cargo check --workspace

# Run the all-in-one MVP binary (once main.rs is wired up)
cargo run -p picloud

Repository Layout

crates/
  shared/                 cross-cutting types
  executor-core/          Rhai engine + sandbox
  orchestrator-core/      event ingress, dispatch
  manager-core/           control plane
  picloud/                MVP all-in-one binary
  picloud-{manager,orchestrator,executor}/   cluster-mode binaries (skeleton)
dashboard/                SvelteKit
caddy/                    Caddyfile
docker/                   Dockerfiles
docs/
  git-workflow.md         Trunk-based workflow

Contributing

See docs/git-workflow.md for the branching and commit conventions. TL;DR: trunk-based, short-lived branches, Conventional Commits, no force-pushing main.

License

TBD.

Description
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